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Diffstat (limited to 'app/tools/gimpgradienttool-editor.c')
| -rw-r--r-- | app/tools/gimpgradienttool-editor.c | 2520 |
1 files changed, 2520 insertions, 0 deletions
diff --git a/app/tools/gimpgradienttool-editor.c b/app/tools/gimpgradienttool-editor.c new file mode 100644 index 0000000..093c00b --- /dev/null +++ b/app/tools/gimpgradienttool-editor.c @@ -0,0 +1,2520 @@ +/* GIMP - The GNU Image Manipulation Program + * Copyright (C) 1995 Spencer Kimball and Peter Mattis + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <https://www.gnu.org/licenses/>. + */ + +#include "config.h" + +#include <gegl.h> +#include <gtk/gtk.h> +#include <gdk/gdkkeysyms.h> + +#include "libgimpbase/gimpbase.h" +#include "libgimpmath/gimpmath.h" +#include "libgimpwidgets/gimpwidgets.h" + +#include "tools-types.h" + +#include "operations/gimp-operation-config.h" + +#include "core/gimpdata.h" +#include "core/gimpgradient.h" +#include "core/gimp-gradients.h" +#include "core/gimpimage.h" + +#include "widgets/gimpcolorpanel.h" +#include "widgets/gimpeditor.h" +#include "widgets/gimpwidgets-utils.h" + +#include "display/gimpdisplay.h" +#include "display/gimpdisplayshell.h" +#include "display/gimptoolgui.h" +#include "display/gimptoolline.h" + +#include "gimpgradientoptions.h" +#include "gimpgradienttool.h" +#include "gimpgradienttool-editor.h" + +#include "gimp-intl.h" + + +#define EPSILON 2e-10 + + +typedef enum +{ + DIRECTION_NONE, + DIRECTION_LEFT, + DIRECTION_RIGHT +} Direction; + + +typedef struct +{ + /* line endpoints at the beginning of the operation */ + gdouble start_x; + gdouble start_y; + gdouble end_x; + gdouble end_y; + + /* copy of the gradient at the beginning of the operation, owned by the gradient + * info, or NULL, if the gradient isn't affected + */ + GimpGradient *gradient; + + /* handle added by the operation, or HANDLE_NONE */ + gint added_handle; + /* handle removed by the operation, or HANDLE_NONE */ + gint removed_handle; + /* selected handle at the end of the operation, or HANDLE_NONE */ + gint selected_handle; +} GradientInfo; + + +/* local function prototypes */ + +static gboolean gimp_gradient_tool_editor_line_can_add_slider (GimpToolLine *line, + gdouble value, + GimpGradientTool *gradient_tool); +static gint gimp_gradient_tool_editor_line_add_slider (GimpToolLine *line, + gdouble value, + GimpGradientTool *gradient_tool); +static void gimp_gradient_tool_editor_line_prepare_to_remove_slider (GimpToolLine *line, + gint slider, + gboolean remove, + GimpGradientTool *gradient_tool); +static void gimp_gradient_tool_editor_line_remove_slider (GimpToolLine *line, + gint slider, + GimpGradientTool *gradient_tool); +static void gimp_gradient_tool_editor_line_selection_changed (GimpToolLine *line, + GimpGradientTool *gradient_tool); +static gboolean gimp_gradient_tool_editor_line_handle_clicked (GimpToolLine *line, + gint handle, + GdkModifierType state, + GimpButtonPressType press_type, + GimpGradientTool *gradient_tool); + +static void gimp_gradient_tool_editor_gui_response (GimpToolGui *gui, + gint response_id, + GimpGradientTool *gradient_tool); + +static void gimp_gradient_tool_editor_color_entry_color_clicked (GimpColorButton *button, + GimpGradientTool *gradient_tool); +static void gimp_gradient_tool_editor_color_entry_color_changed (GimpColorButton *button, + GimpGradientTool *gradient_tool); +static void gimp_gradient_tool_editor_color_entry_color_response (GimpColorButton *button, + GimpColorDialogState state, + GimpGradientTool *gradient_tool); + +static void gimp_gradient_tool_editor_color_entry_type_changed (GtkComboBox *combo, + GimpGradientTool *gradient_tool); + +static void gimp_gradient_tool_editor_endpoint_se_value_changed (GimpSizeEntry *se, + GimpGradientTool *gradient_tool); + +static void gimp_gradient_tool_editor_stop_se_value_changed (GimpSizeEntry *se, + GimpGradientTool *gradient_tool); + +static void gimp_gradient_tool_editor_stop_delete_clicked (GtkWidget *button, + GimpGradientTool *gradient_tool); + +static void gimp_gradient_tool_editor_midpoint_se_value_changed (GimpSizeEntry *se, + GimpGradientTool *gradient_tool); + +static void gimp_gradient_tool_editor_midpoint_type_changed (GtkComboBox *combo, + GimpGradientTool *gradient_tool); + +static void gimp_gradient_tool_editor_midpoint_color_changed (GtkComboBox *combo, + GimpGradientTool *gradient_tool); + +static void gimp_gradient_tool_editor_midpoint_new_stop_clicked (GtkWidget *button, + GimpGradientTool *gradient_tool); +static void gimp_gradient_tool_editor_midpoint_center_clicked (GtkWidget *button, + GimpGradientTool *gradient_tool); + +static gboolean gimp_gradient_tool_editor_flush_idle (GimpGradientTool *gradient_tool); + +static gboolean gimp_gradient_tool_editor_is_gradient_editable (GimpGradientTool *gradient_tool); + +static gboolean gimp_gradient_tool_editor_handle_is_endpoint (GimpGradientTool *gradient_tool, + gint handle); +static gboolean gimp_gradient_tool_editor_handle_is_stop (GimpGradientTool *gradient_tool, + gint handle); +static gboolean gimp_gradient_tool_editor_handle_is_midpoint (GimpGradientTool *gradient_tool, + gint handle); +static GimpGradientSegment * gimp_gradient_tool_editor_handle_get_segment (GimpGradientTool *gradient_tool, + gint handle); + +static void gimp_gradient_tool_editor_block_handlers (GimpGradientTool *gradient_tool); +static void gimp_gradient_tool_editor_unblock_handlers (GimpGradientTool *gradient_tool); +static gboolean gimp_gradient_tool_editor_are_handlers_blocked (GimpGradientTool *gradient_tool); + +static void gimp_gradient_tool_editor_freeze_gradient (GimpGradientTool *gradient_tool); +static void gimp_gradient_tool_editor_thaw_gradient (GimpGradientTool *gradient_tool); + +static gint gimp_gradient_tool_editor_add_stop (GimpGradientTool *gradient_tool, + gdouble value); +static void gimp_gradient_tool_editor_delete_stop (GimpGradientTool *gradient_tool, + gint slider); +static gint gimp_gradient_tool_editor_midpoint_to_stop (GimpGradientTool *gradient_tool, + gint slider); + +static void gimp_gradient_tool_editor_update_sliders (GimpGradientTool *gradient_tool); + +static void gimp_gradient_tool_editor_purge_gradient_history (GSList **stack); +static void gimp_gradient_tool_editor_purge_gradient (GimpGradientTool *gradient_tool); + +static GtkWidget * gimp_gradient_tool_editor_color_entry_new (GimpGradientTool *gradient_tool, + const gchar *title, + Direction direction, + GtkWidget *chain_button, + GtkWidget **color_panel, + GtkWidget **type_combo); +static void gimp_gradient_tool_editor_init_endpoint_gui (GimpGradientTool *gradient_tool); +static void gimp_gradient_tool_editor_init_stop_gui (GimpGradientTool *gradient_tool); +static void gimp_gradient_tool_editor_init_midpoint_gui (GimpGradientTool *gradient_tool); +static void gimp_gradient_tool_editor_update_endpoint_gui (GimpGradientTool *gradient_tool, + gint selection); +static void gimp_gradient_tool_editor_update_stop_gui (GimpGradientTool *gradient_tool, + gint selection); +static void gimp_gradient_tool_editor_update_midpoint_gui (GimpGradientTool *gradient_tool, + gint selection); +static void gimp_gradient_tool_editor_update_gui (GimpGradientTool *gradient_tool); + +static GradientInfo * gimp_gradient_tool_editor_gradient_info_new (GimpGradientTool *gradient_tool); +static void gimp_gradient_tool_editor_gradient_info_free (GradientInfo *info); +static void gimp_gradient_tool_editor_gradient_info_apply (GimpGradientTool *gradient_tool, + const GradientInfo *info, + gboolean set_selection); +static gboolean gimp_gradient_tool_editor_gradient_info_is_trivial (GimpGradientTool *gradient_tool, + const GradientInfo *info); + + +/* private functions */ + + +static gboolean +gimp_gradient_tool_editor_line_can_add_slider (GimpToolLine *line, + gdouble value, + GimpGradientTool *gradient_tool) +{ + GimpGradientOptions *options = GIMP_GRADIENT_TOOL_GET_OPTIONS (gradient_tool); + gdouble offset = options->offset / 100.0; + + return gimp_gradient_tool_editor_is_gradient_editable (gradient_tool) && + value >= offset; +} + +static gint +gimp_gradient_tool_editor_line_add_slider (GimpToolLine *line, + gdouble value, + GimpGradientTool *gradient_tool) +{ + GimpGradientOptions *options = GIMP_GRADIENT_TOOL_GET_OPTIONS (gradient_tool); + GimpPaintOptions *paint_options = GIMP_PAINT_OPTIONS (options); + gdouble offset = options->offset / 100.0; + + /* adjust slider value according to the offset */ + value = (value - offset) / (1.0 - offset); + + /* flip the slider value, if necessary */ + if (paint_options->gradient_options->gradient_reverse) + value = 1.0 - value; + + return gimp_gradient_tool_editor_add_stop (gradient_tool, value); +} + +static void +gimp_gradient_tool_editor_line_prepare_to_remove_slider (GimpToolLine *line, + gint slider, + gboolean remove, + GimpGradientTool *gradient_tool) +{ + if (remove) + { + GradientInfo *info; + GimpGradient *tentative_gradient; + + /* show a tentative gradient, demonstrating the result of actually + * removing the slider + */ + + info = gradient_tool->undo_stack->data; + + if (info->added_handle == slider) + { + /* see comment in gimp_gradient_tool_editor_delete_stop() */ + + gimp_assert (info->gradient != NULL); + + tentative_gradient = g_object_ref (info->gradient); + } + else + { + GimpGradientSegment *seg; + gint i; + + tentative_gradient = + GIMP_GRADIENT (gimp_data_duplicate (GIMP_DATA (gradient_tool->gradient))); + + seg = gimp_gradient_tool_editor_handle_get_segment (gradient_tool, slider); + + i = gimp_gradient_segment_range_get_n_segments (gradient_tool->gradient, + gradient_tool->gradient->segments, + seg) - 1; + + seg = gimp_gradient_segment_get_nth (tentative_gradient->segments, i); + + gimp_gradient_segment_range_merge (tentative_gradient, + seg, seg->next, NULL, NULL); + } + + gimp_gradient_tool_set_tentative_gradient (gradient_tool, tentative_gradient); + + g_object_unref (tentative_gradient); + } + else + { + gimp_gradient_tool_set_tentative_gradient (gradient_tool, NULL); + } +} + +static void +gimp_gradient_tool_editor_line_remove_slider (GimpToolLine *line, + gint slider, + GimpGradientTool *gradient_tool) +{ + gimp_gradient_tool_editor_delete_stop (gradient_tool, slider); + gimp_gradient_tool_set_tentative_gradient (gradient_tool, NULL); +} + +static void +gimp_gradient_tool_editor_line_selection_changed (GimpToolLine *line, + GimpGradientTool *gradient_tool) +{ + gint selection; + + selection = + gimp_tool_line_get_selection (GIMP_TOOL_LINE (gradient_tool->widget)); + + if (gradient_tool->gui) + { + /* hide all color dialogs */ + gimp_color_panel_dialog_response ( + GIMP_COLOR_PANEL (gradient_tool->endpoint_color_panel), + GIMP_COLOR_DIALOG_OK); + gimp_color_panel_dialog_response ( + GIMP_COLOR_PANEL (gradient_tool->stop_left_color_panel), + GIMP_COLOR_DIALOG_OK); + gimp_color_panel_dialog_response ( + GIMP_COLOR_PANEL (gradient_tool->stop_right_color_panel), + GIMP_COLOR_DIALOG_OK); + + /* reset the stop colors chain button */ + if (gimp_gradient_tool_editor_handle_is_stop (gradient_tool, selection)) + { + const GimpGradientSegment *seg; + gboolean homogeneous; + + seg = gimp_gradient_tool_editor_handle_get_segment (gradient_tool, + selection); + + homogeneous = seg->right_color.r == seg->next->left_color.r && + seg->right_color.g == seg->next->left_color.g && + seg->right_color.b == seg->next->left_color.b && + seg->right_color.a == seg->next->left_color.a && + seg->right_color_type == seg->next->left_color_type; + + gimp_chain_button_set_active ( + GIMP_CHAIN_BUTTON (gradient_tool->stop_chain_button), homogeneous); + } + } + + gimp_gradient_tool_editor_update_gui (gradient_tool); +} + +static gboolean +gimp_gradient_tool_editor_line_handle_clicked (GimpToolLine *line, + gint handle, + GdkModifierType state, + GimpButtonPressType press_type, + GimpGradientTool *gradient_tool) +{ + if (gimp_gradient_tool_editor_handle_is_midpoint (gradient_tool, handle)) + { + if (press_type == GIMP_BUTTON_PRESS_DOUBLE && + gimp_gradient_tool_editor_is_gradient_editable (gradient_tool)) + { + gint stop; + + stop = gimp_gradient_tool_editor_midpoint_to_stop (gradient_tool, handle); + + gimp_tool_line_set_selection (line, stop); + + /* return FALSE, so that the new slider can be dragged immediately */ + return FALSE; + } + } + + return FALSE; +} + + +static void +gimp_gradient_tool_editor_gui_response (GimpToolGui *gui, + gint response_id, + GimpGradientTool *gradient_tool) +{ + switch (response_id) + { + default: + gimp_tool_line_set_selection (GIMP_TOOL_LINE (gradient_tool->widget), + GIMP_TOOL_LINE_HANDLE_NONE); + break; + } +} + +static void +gimp_gradient_tool_editor_color_entry_color_clicked (GimpColorButton *button, + GimpGradientTool *gradient_tool) +{ + gimp_gradient_tool_editor_start_edit (gradient_tool); +} + +static void +gimp_gradient_tool_editor_color_entry_color_changed (GimpColorButton *button, + GimpGradientTool *gradient_tool) +{ + GimpGradientOptions *options = GIMP_GRADIENT_TOOL_GET_OPTIONS (gradient_tool); + GimpPaintOptions *paint_options = GIMP_PAINT_OPTIONS (options); + gint selection; + GimpRGB color; + Direction direction; + GtkWidget *chain_button; + GimpGradientSegment *seg; + + if (gimp_gradient_tool_editor_are_handlers_blocked (gradient_tool)) + return; + + selection = + gimp_tool_line_get_selection (GIMP_TOOL_LINE (gradient_tool->widget)); + + gimp_color_button_get_color (button, &color); + + direction = + GPOINTER_TO_INT (g_object_get_data (G_OBJECT (button), + "gimp-gradient-tool-editor-direction")); + chain_button = g_object_get_data (G_OBJECT (button), + "gimp-gradient-tool-editor-chain-button"); + + gimp_gradient_tool_editor_start_edit (gradient_tool); + gimp_gradient_tool_editor_freeze_gradient (gradient_tool); + + /* swap the endpoint handles, if necessary */ + if (paint_options->gradient_options->gradient_reverse) + { + switch (selection) + { + case GIMP_TOOL_LINE_HANDLE_START: + selection = GIMP_TOOL_LINE_HANDLE_END; + break; + + case GIMP_TOOL_LINE_HANDLE_END: + selection = GIMP_TOOL_LINE_HANDLE_START; + break; + } + } + + seg = gimp_gradient_tool_editor_handle_get_segment (gradient_tool, selection); + + switch (selection) + { + case GIMP_TOOL_LINE_HANDLE_START: + seg->left_color = color; + seg->left_color_type = GIMP_GRADIENT_COLOR_FIXED; + break; + + case GIMP_TOOL_LINE_HANDLE_END: + seg->right_color = color; + seg->right_color_type = GIMP_GRADIENT_COLOR_FIXED; + break; + + default: + if (direction == DIRECTION_LEFT || + (chain_button && + gimp_chain_button_get_active (GIMP_CHAIN_BUTTON (chain_button)))) + { + seg->right_color = color; + seg->right_color_type = GIMP_GRADIENT_COLOR_FIXED; + } + + if (direction == DIRECTION_RIGHT || + (chain_button && + gimp_chain_button_get_active (GIMP_CHAIN_BUTTON (chain_button)))) + { + seg->next->left_color = color; + seg->next->left_color_type = GIMP_GRADIENT_COLOR_FIXED; + } + } + + gimp_gradient_tool_editor_thaw_gradient (gradient_tool); + gimp_gradient_tool_editor_end_edit (gradient_tool, FALSE); +} + +static void +gimp_gradient_tool_editor_color_entry_color_response (GimpColorButton *button, + GimpColorDialogState state, + GimpGradientTool *gradient_tool) +{ + gimp_gradient_tool_editor_end_edit (gradient_tool, FALSE); +} + +static void +gimp_gradient_tool_editor_color_entry_type_changed (GtkComboBox *combo, + GimpGradientTool *gradient_tool) +{ + GimpGradientOptions *options = GIMP_GRADIENT_TOOL_GET_OPTIONS (gradient_tool); + GimpPaintOptions *paint_options = GIMP_PAINT_OPTIONS (options); + gint selection; + gint color_type; + Direction direction; + GtkWidget *chain_button; + GimpGradientSegment *seg; + + if (gimp_gradient_tool_editor_are_handlers_blocked (gradient_tool)) + return; + + selection = + gimp_tool_line_get_selection (GIMP_TOOL_LINE (gradient_tool->widget)); + + if (! gimp_int_combo_box_get_active (GIMP_INT_COMBO_BOX (combo), &color_type)) + return; + + direction = + GPOINTER_TO_INT (g_object_get_data (G_OBJECT (combo), + "gimp-gradient-tool-editor-direction")); + chain_button = g_object_get_data (G_OBJECT (combo), + "gimp-gradient-tool-editor-chain-button"); + + gimp_gradient_tool_editor_start_edit (gradient_tool); + gimp_gradient_tool_editor_freeze_gradient (gradient_tool); + + /* swap the endpoint handles, if necessary */ + if (paint_options->gradient_options->gradient_reverse) + { + switch (selection) + { + case GIMP_TOOL_LINE_HANDLE_START: + selection = GIMP_TOOL_LINE_HANDLE_END; + break; + + case GIMP_TOOL_LINE_HANDLE_END: + selection = GIMP_TOOL_LINE_HANDLE_START; + break; + } + } + + seg = gimp_gradient_tool_editor_handle_get_segment (gradient_tool, selection); + + switch (selection) + { + case GIMP_TOOL_LINE_HANDLE_START: + seg->left_color_type = color_type; + break; + + case GIMP_TOOL_LINE_HANDLE_END: + seg->right_color_type = color_type; + break; + + default: + if (direction == DIRECTION_LEFT || + (chain_button && + gimp_chain_button_get_active (GIMP_CHAIN_BUTTON (chain_button)))) + { + seg->right_color_type = color_type; + } + + if (direction == DIRECTION_RIGHT || + (chain_button && + gimp_chain_button_get_active (GIMP_CHAIN_BUTTON (chain_button)))) + { + seg->next->left_color_type = color_type; + } + } + + gimp_gradient_tool_editor_thaw_gradient (gradient_tool); + gimp_gradient_tool_editor_end_edit (gradient_tool, FALSE); +} + +static void +gimp_gradient_tool_editor_endpoint_se_value_changed (GimpSizeEntry *se, + GimpGradientTool *gradient_tool) +{ + gint selection; + gdouble x; + gdouble y; + + if (gimp_gradient_tool_editor_are_handlers_blocked (gradient_tool)) + return; + + selection = + gimp_tool_line_get_selection (GIMP_TOOL_LINE (gradient_tool->widget)); + + if (selection == GIMP_TOOL_LINE_HANDLE_NONE) + return; + + x = gimp_size_entry_get_refval (se, 0); + y = gimp_size_entry_get_refval (se, 1); + + gimp_gradient_tool_editor_start_edit (gradient_tool); + gimp_gradient_tool_editor_block_handlers (gradient_tool); + + switch (selection) + { + case GIMP_TOOL_LINE_HANDLE_START: + g_object_set (gradient_tool->widget, + "x1", x, + "y1", y, + NULL); + break; + + case GIMP_TOOL_LINE_HANDLE_END: + g_object_set (gradient_tool->widget, + "x2", x, + "y2", y, + NULL); + break; + + default: + gimp_assert_not_reached (); + } + + gimp_gradient_tool_editor_unblock_handlers (gradient_tool); + gimp_gradient_tool_editor_end_edit (gradient_tool, FALSE); +} + +static void +gimp_gradient_tool_editor_stop_se_value_changed (GimpSizeEntry *se, + GimpGradientTool *gradient_tool) +{ + gint selection; + gdouble value; + GimpGradientSegment *seg; + + if (gimp_gradient_tool_editor_are_handlers_blocked (gradient_tool)) + return; + + selection = + gimp_tool_line_get_selection (GIMP_TOOL_LINE (gradient_tool->widget)); + + if (selection == GIMP_TOOL_LINE_HANDLE_NONE) + return; + + value = gimp_size_entry_get_refval (se, 0) / 100.0; + + gimp_gradient_tool_editor_start_edit (gradient_tool); + gimp_gradient_tool_editor_freeze_gradient (gradient_tool); + + seg = gimp_gradient_tool_editor_handle_get_segment (gradient_tool, selection); + + gimp_gradient_segment_range_compress (gradient_tool->gradient, + seg, seg, + seg->left, value); + gimp_gradient_segment_range_compress (gradient_tool->gradient, + seg->next, seg->next, + value, seg->next->right); + + gimp_gradient_tool_editor_thaw_gradient (gradient_tool); + gimp_gradient_tool_editor_end_edit (gradient_tool, FALSE); +} + +static void +gimp_gradient_tool_editor_stop_delete_clicked (GtkWidget *button, + GimpGradientTool *gradient_tool) +{ + gint selection; + + selection = + gimp_tool_line_get_selection (GIMP_TOOL_LINE (gradient_tool->widget)); + + gimp_gradient_tool_editor_delete_stop (gradient_tool, selection); +} + +static void +gimp_gradient_tool_editor_midpoint_se_value_changed (GimpSizeEntry *se, + GimpGradientTool *gradient_tool) +{ + gint selection; + gdouble value; + GimpGradientSegment *seg; + + if (gimp_gradient_tool_editor_are_handlers_blocked (gradient_tool)) + return; + + selection = + gimp_tool_line_get_selection (GIMP_TOOL_LINE (gradient_tool->widget)); + + if (selection == GIMP_TOOL_LINE_HANDLE_NONE) + return; + + value = gimp_size_entry_get_refval (se, 0) / 100.0; + + gimp_gradient_tool_editor_start_edit (gradient_tool); + gimp_gradient_tool_editor_freeze_gradient (gradient_tool); + + seg = gimp_gradient_tool_editor_handle_get_segment (gradient_tool, selection); + + seg->middle = value; + + gimp_gradient_tool_editor_thaw_gradient (gradient_tool); + gimp_gradient_tool_editor_end_edit (gradient_tool, FALSE); +} + +static void +gimp_gradient_tool_editor_midpoint_type_changed (GtkComboBox *combo, + GimpGradientTool *gradient_tool) +{ + gint selection; + gint type; + GimpGradientSegment *seg; + + if (gimp_gradient_tool_editor_are_handlers_blocked (gradient_tool)) + return; + + selection = + gimp_tool_line_get_selection (GIMP_TOOL_LINE (gradient_tool->widget)); + + if (! gimp_int_combo_box_get_active (GIMP_INT_COMBO_BOX (combo), &type)) + return; + + gimp_gradient_tool_editor_start_edit (gradient_tool); + gimp_gradient_tool_editor_freeze_gradient (gradient_tool); + + seg = gimp_gradient_tool_editor_handle_get_segment (gradient_tool, selection); + + seg->type = type; + + gimp_gradient_tool_editor_thaw_gradient (gradient_tool); + gimp_gradient_tool_editor_end_edit (gradient_tool, FALSE); +} + +static void +gimp_gradient_tool_editor_midpoint_color_changed (GtkComboBox *combo, + GimpGradientTool *gradient_tool) +{ + gint selection; + gint color; + GimpGradientSegment *seg; + + if (gimp_gradient_tool_editor_are_handlers_blocked (gradient_tool)) + return; + + selection = + gimp_tool_line_get_selection (GIMP_TOOL_LINE (gradient_tool->widget)); + + if (! gimp_int_combo_box_get_active (GIMP_INT_COMBO_BOX (combo), &color)) + return; + + gimp_gradient_tool_editor_start_edit (gradient_tool); + gimp_gradient_tool_editor_freeze_gradient (gradient_tool); + + seg = gimp_gradient_tool_editor_handle_get_segment (gradient_tool, selection); + + seg->color = color; + + gimp_gradient_tool_editor_thaw_gradient (gradient_tool); + gimp_gradient_tool_editor_end_edit (gradient_tool, FALSE); +} + +static void +gimp_gradient_tool_editor_midpoint_new_stop_clicked (GtkWidget *button, + GimpGradientTool *gradient_tool) +{ + gint selection; + gint stop; + + selection = + gimp_tool_line_get_selection (GIMP_TOOL_LINE (gradient_tool->widget)); + + stop = gimp_gradient_tool_editor_midpoint_to_stop (gradient_tool, selection); + + gimp_tool_line_set_selection (GIMP_TOOL_LINE (gradient_tool->widget), stop); +} + +static void +gimp_gradient_tool_editor_midpoint_center_clicked (GtkWidget *button, + GimpGradientTool *gradient_tool) +{ + gint selection; + GimpGradientSegment *seg; + + selection = + gimp_tool_line_get_selection (GIMP_TOOL_LINE (gradient_tool->widget)); + + gimp_gradient_tool_editor_start_edit (gradient_tool); + gimp_gradient_tool_editor_freeze_gradient (gradient_tool); + + seg = gimp_gradient_tool_editor_handle_get_segment (gradient_tool, selection); + + gimp_gradient_segment_range_recenter_handles (gradient_tool->gradient, seg, seg); + + gimp_gradient_tool_editor_thaw_gradient (gradient_tool); + gimp_gradient_tool_editor_end_edit (gradient_tool, FALSE); +} + +static gboolean +gimp_gradient_tool_editor_flush_idle (GimpGradientTool *gradient_tool) +{ + GimpDisplay *display = GIMP_TOOL (gradient_tool)->display; + + gimp_image_flush (gimp_display_get_image (display)); + + gradient_tool->flush_idle_id = 0; + + return G_SOURCE_REMOVE; +} + +static gboolean +gimp_gradient_tool_editor_is_gradient_editable (GimpGradientTool *gradient_tool) +{ + GimpGradientOptions *options = GIMP_GRADIENT_TOOL_GET_OPTIONS (gradient_tool); + + return ! options->modify_active || + gimp_data_is_writable (GIMP_DATA (gradient_tool->gradient)); +} + +static gboolean +gimp_gradient_tool_editor_handle_is_endpoint (GimpGradientTool *gradient_tool, + gint handle) +{ + return handle == GIMP_TOOL_LINE_HANDLE_START || + handle == GIMP_TOOL_LINE_HANDLE_END; +} + +static gboolean +gimp_gradient_tool_editor_handle_is_stop (GimpGradientTool *gradient_tool, + gint handle) +{ + gint n_sliders; + + gimp_tool_line_get_sliders (GIMP_TOOL_LINE (gradient_tool->widget), &n_sliders); + + return handle >= 0 && handle < n_sliders / 2; +} + +static gboolean +gimp_gradient_tool_editor_handle_is_midpoint (GimpGradientTool *gradient_tool, + gint handle) +{ + gint n_sliders; + + gimp_tool_line_get_sliders (GIMP_TOOL_LINE (gradient_tool->widget), &n_sliders); + + return handle >= n_sliders / 2; +} + +static GimpGradientSegment * +gimp_gradient_tool_editor_handle_get_segment (GimpGradientTool *gradient_tool, + gint handle) +{ + switch (handle) + { + case GIMP_TOOL_LINE_HANDLE_START: + return gradient_tool->gradient->segments; + + case GIMP_TOOL_LINE_HANDLE_END: + return gimp_gradient_segment_get_last (gradient_tool->gradient->segments); + + default: + { + const GimpControllerSlider *sliders; + gint n_sliders; + gint seg_i; + + sliders = gimp_tool_line_get_sliders (GIMP_TOOL_LINE (gradient_tool->widget), + &n_sliders); + + gimp_assert (handle >= 0 && handle < n_sliders); + + seg_i = GPOINTER_TO_INT (sliders[handle].data); + + return gimp_gradient_segment_get_nth (gradient_tool->gradient->segments, + seg_i); + } + } +} + +static void +gimp_gradient_tool_editor_block_handlers (GimpGradientTool *gradient_tool) +{ + gradient_tool->block_handlers_count++; +} + +static void +gimp_gradient_tool_editor_unblock_handlers (GimpGradientTool *gradient_tool) +{ + gimp_assert (gradient_tool->block_handlers_count > 0); + + gradient_tool->block_handlers_count--; +} + +static gboolean +gimp_gradient_tool_editor_are_handlers_blocked (GimpGradientTool *gradient_tool) +{ + return gradient_tool->block_handlers_count > 0; +} + +static void +gimp_gradient_tool_editor_freeze_gradient (GimpGradientTool *gradient_tool) +{ + GimpGradientOptions *options = GIMP_GRADIENT_TOOL_GET_OPTIONS (gradient_tool); + GimpGradient *custom; + GradientInfo *info; + + gimp_gradient_tool_editor_block_handlers (gradient_tool); + + custom = gimp_gradients_get_custom (GIMP_CONTEXT (options)->gimp); + + if (gradient_tool->gradient == custom || options->modify_active) + { + gimp_assert (gimp_gradient_tool_editor_is_gradient_editable (gradient_tool)); + + gimp_data_freeze (GIMP_DATA (gradient_tool->gradient)); + } + else + { + /* copy the active gradient to the custom gradient, and make the custom + * gradient active. + */ + gimp_data_freeze (GIMP_DATA (custom)); + + gimp_data_copy (GIMP_DATA (custom), GIMP_DATA (gradient_tool->gradient)); + + gimp_context_set_gradient (GIMP_CONTEXT (options), custom); + + gimp_assert (gradient_tool->gradient == custom); + gimp_assert (gimp_gradient_tool_editor_is_gradient_editable (gradient_tool)); + } + + if (gradient_tool->edit_count > 0) + { + info = gradient_tool->undo_stack->data; + + if (! info->gradient) + { + info->gradient = + GIMP_GRADIENT (gimp_data_duplicate (GIMP_DATA (gradient_tool->gradient))); + } + } +} + +static void +gimp_gradient_tool_editor_thaw_gradient (GimpGradientTool *gradient_tool) +{ + gimp_data_thaw (GIMP_DATA (gradient_tool->gradient)); + + gimp_gradient_tool_editor_update_sliders (gradient_tool); + gimp_gradient_tool_editor_update_gui (gradient_tool); + + gimp_gradient_tool_editor_unblock_handlers (gradient_tool); +} + +static gint +gimp_gradient_tool_editor_add_stop (GimpGradientTool *gradient_tool, + gdouble value) +{ + GimpGradientOptions *options = GIMP_GRADIENT_TOOL_GET_OPTIONS (gradient_tool); + GimpPaintOptions *paint_options = GIMP_PAINT_OPTIONS (options); + GimpGradientSegment *seg; + gint stop; + GradientInfo *info; + + gimp_gradient_tool_editor_start_edit (gradient_tool); + gimp_gradient_tool_editor_freeze_gradient (gradient_tool); + + gimp_gradient_split_at (gradient_tool->gradient, + GIMP_CONTEXT (options), NULL, value, + paint_options->gradient_options->gradient_blend_color_space, + &seg, NULL); + + stop = + gimp_gradient_segment_range_get_n_segments (gradient_tool->gradient, + gradient_tool->gradient->segments, + seg) - 1; + + info = gradient_tool->undo_stack->data; + info->added_handle = stop; + + gimp_gradient_tool_editor_thaw_gradient (gradient_tool); + gimp_gradient_tool_editor_end_edit (gradient_tool, FALSE); + + return stop; +} + +static void +gimp_gradient_tool_editor_delete_stop (GimpGradientTool *gradient_tool, + gint slider) +{ + GradientInfo *info; + + gimp_assert (gimp_gradient_tool_editor_handle_is_stop (gradient_tool, slider)); + + gimp_gradient_tool_editor_start_edit (gradient_tool); + gimp_gradient_tool_editor_freeze_gradient (gradient_tool); + + info = gradient_tool->undo_stack->data; + + if (info->added_handle == slider) + { + /* when removing a stop that was added as part of the current action, + * restore the original gradient at the beginning of the action, rather + * than deleting the stop from the current gradient, so that the affected + * midpoint returns to its state at the beginning of the action, instead + * of being reset. + * + * note that this assumes that the gradient hasn't changed in any other + * way during the action, which is ugly, but currently always true. + */ + + gimp_assert (info->gradient != NULL); + + gimp_data_copy (GIMP_DATA (gradient_tool->gradient), + GIMP_DATA (info->gradient)); + + g_clear_object (&info->gradient); + + info->added_handle = GIMP_TOOL_LINE_HANDLE_NONE; + } + else + { + GimpGradientSegment *seg; + + seg = gimp_gradient_tool_editor_handle_get_segment (gradient_tool, slider); + + gimp_gradient_segment_range_merge (gradient_tool->gradient, + seg, seg->next, NULL, NULL); + + info->removed_handle = slider; + } + + gimp_gradient_tool_editor_thaw_gradient (gradient_tool); + gimp_gradient_tool_editor_end_edit (gradient_tool, FALSE); +} + +static gint +gimp_gradient_tool_editor_midpoint_to_stop (GimpGradientTool *gradient_tool, + gint slider) +{ + const GimpControllerSlider *sliders; + + gimp_assert (gimp_gradient_tool_editor_handle_is_midpoint (gradient_tool, slider)); + + sliders = gimp_tool_line_get_sliders (GIMP_TOOL_LINE (gradient_tool->widget), + NULL); + + if (sliders[slider].value > sliders[slider].min + EPSILON && + sliders[slider].value < sliders[slider].max - EPSILON) + { + const GimpGradientSegment *seg; + gint stop; + GradientInfo *info; + + seg = gimp_gradient_tool_editor_handle_get_segment (gradient_tool, slider); + + stop = gimp_gradient_tool_editor_add_stop (gradient_tool, seg->middle); + + info = gradient_tool->undo_stack->data; + info->removed_handle = slider; + + slider = stop; + } + + return slider; +} + +static void +gimp_gradient_tool_editor_update_sliders (GimpGradientTool *gradient_tool) +{ + GimpGradientOptions *options = GIMP_GRADIENT_TOOL_GET_OPTIONS (gradient_tool); + GimpPaintOptions *paint_options = GIMP_PAINT_OPTIONS (options); + gdouble offset = options->offset / 100.0; + gboolean editable; + GimpControllerSlider *sliders; + gint n_sliders; + gint n_segments; + GimpGradientSegment *seg; + GimpControllerSlider *slider; + gint i; + + if (! gradient_tool->widget || options->instant) + return; + + editable = gimp_gradient_tool_editor_is_gradient_editable (gradient_tool); + + n_segments = gimp_gradient_segment_range_get_n_segments ( + gradient_tool->gradient, gradient_tool->gradient->segments, NULL); + + n_sliders = (n_segments - 1) + /* gradient stops, between each adjacent + * pair of segments */ + (n_segments); /* midpoints, inside each segment */ + + sliders = g_new (GimpControllerSlider, n_sliders); + + slider = sliders; + + /* initialize the gradient-stop sliders */ + for (seg = gradient_tool->gradient->segments, i = 0; + seg->next; + seg = seg->next, i++) + { + *slider = GIMP_CONTROLLER_SLIDER_DEFAULT; + + slider->value = seg->right; + slider->min = seg->left; + slider->max = seg->next->right; + + slider->movable = editable; + slider->removable = editable; + + slider->data = GINT_TO_POINTER (i); + + slider++; + } + + /* initialize the midpoint sliders */ + for (seg = gradient_tool->gradient->segments, i = 0; + seg; + seg = seg->next, i++) + { + *slider = GIMP_CONTROLLER_SLIDER_DEFAULT; + + slider->value = seg->middle; + slider->min = seg->left; + slider->max = seg->right; + + /* hide midpoints of zero-length segments, since they'd otherwise + * prevent the segment's endpoints from being selected + */ + slider->visible = fabs (slider->max - slider->min) > EPSILON; + slider->movable = editable; + + slider->autohide = TRUE; + slider->type = GIMP_HANDLE_FILLED_CIRCLE; + slider->size = 0.6; + + slider->data = GINT_TO_POINTER (i); + + slider++; + } + + /* flip the slider limits and values, if necessary */ + if (paint_options->gradient_options->gradient_reverse) + { + for (i = 0; i < n_sliders; i++) + { + gdouble temp; + + sliders[i].value = 1.0 - sliders[i].value; + temp = sliders[i].min; + sliders[i].min = 1.0 - sliders[i].max; + sliders[i].max = 1.0 - temp; + } + } + + /* adjust the sliders according to the offset */ + for (i = 0; i < n_sliders; i++) + { + sliders[i].value = (1.0 - offset) * sliders[i].value + offset; + sliders[i].min = (1.0 - offset) * sliders[i].min + offset; + sliders[i].max = (1.0 - offset) * sliders[i].max + offset; + } + + /* avoid updating the gradient in gimp_gradient_tool_editor_line_changed() */ + gimp_gradient_tool_editor_block_handlers (gradient_tool); + + gimp_tool_line_set_sliders (GIMP_TOOL_LINE (gradient_tool->widget), + sliders, n_sliders); + + gimp_gradient_tool_editor_unblock_handlers (gradient_tool); + + g_free (sliders); +} + +static void +gimp_gradient_tool_editor_purge_gradient_history (GSList **stack) +{ + GSList *link; + + /* eliminate all history steps that modify the gradient */ + while ((link = *stack)) + { + GradientInfo *info = link->data; + + if (info->gradient) + { + gimp_gradient_tool_editor_gradient_info_free (info); + + *stack = g_slist_delete_link (*stack, link); + } + else + { + stack = &link->next; + } + } +} + +static void +gimp_gradient_tool_editor_purge_gradient (GimpGradientTool *gradient_tool) +{ + if (gradient_tool->widget) + { + gimp_gradient_tool_editor_update_sliders (gradient_tool); + + gimp_tool_line_set_selection (GIMP_TOOL_LINE (gradient_tool->widget), + GIMP_TOOL_LINE_HANDLE_NONE); + } + + gimp_gradient_tool_editor_purge_gradient_history (&gradient_tool->undo_stack); + gimp_gradient_tool_editor_purge_gradient_history (&gradient_tool->redo_stack); +} + +static GtkWidget * +gimp_gradient_tool_editor_color_entry_new (GimpGradientTool *gradient_tool, + const gchar *title, + Direction direction, + GtkWidget *chain_button, + GtkWidget **color_panel, + GtkWidget **type_combo) +{ + GimpContext *context = GIMP_CONTEXT (GIMP_GRADIENT_TOOL_GET_OPTIONS (gradient_tool)); + GtkWidget *hbox; + GtkWidget *button; + GtkWidget *combo; + GimpRGB color = {}; + + hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 2); + + /* the color panel */ + *color_panel = button = gimp_color_panel_new (title, &color, + GIMP_COLOR_AREA_SMALL_CHECKS, + 24, 24); + gimp_color_button_set_update (GIMP_COLOR_BUTTON (button), TRUE); + gimp_color_panel_set_context (GIMP_COLOR_PANEL (button), context); + gtk_box_pack_start (GTK_BOX (hbox), button, TRUE, TRUE, 0); + gtk_widget_show (button); + + g_object_set_data (G_OBJECT (button), + "gimp-gradient-tool-editor-direction", + GINT_TO_POINTER (direction)); + g_object_set_data (G_OBJECT (button), + "gimp-gradient-tool-editor-chain-button", + chain_button); + + g_signal_connect (button, "clicked", + G_CALLBACK (gimp_gradient_tool_editor_color_entry_color_clicked), + gradient_tool); + g_signal_connect (button, "color-changed", + G_CALLBACK (gimp_gradient_tool_editor_color_entry_color_changed), + gradient_tool); + g_signal_connect (button, "response", + G_CALLBACK (gimp_gradient_tool_editor_color_entry_color_response), + gradient_tool); + + /* the color type combo */ + *type_combo = combo = gimp_enum_combo_box_new (GIMP_TYPE_GRADIENT_COLOR); + gtk_box_pack_start (GTK_BOX (hbox), combo, FALSE, TRUE, 0); + gtk_widget_show (combo); + + g_object_set_data (G_OBJECT (combo), + "gimp-gradient-tool-editor-direction", + GINT_TO_POINTER (direction)); + g_object_set_data (G_OBJECT (combo), + "gimp-gradient-tool-editor-chain-button", + chain_button); + + g_signal_connect (combo, "changed", + G_CALLBACK (gimp_gradient_tool_editor_color_entry_type_changed), + gradient_tool); + + return hbox; +} + +static void +gimp_gradient_tool_editor_init_endpoint_gui (GimpGradientTool *gradient_tool) +{ + GimpDisplay *display = GIMP_TOOL (gradient_tool)->display; + GimpDisplayShell *shell = gimp_display_get_shell (display); + GimpImage *image = gimp_display_get_image (display); + gdouble xres; + gdouble yres; + GtkWidget *editor; + GtkWidget *table; + GtkWidget *label; + GtkWidget *spinbutton; + GtkWidget *se; + GtkWidget *hbox; + gint row = 0; + + gimp_image_get_resolution (image, &xres, &yres); + + /* the endpoint editor */ + gradient_tool->endpoint_editor = + editor = gimp_editor_new (); + gtk_box_pack_start (GTK_BOX (gimp_tool_gui_get_vbox (gradient_tool->gui)), + editor, FALSE, TRUE, 0); + + /* the main table */ + table = gtk_table_new (1, 2, FALSE); + gtk_table_set_row_spacings (GTK_TABLE (table), 4); + gtk_table_set_col_spacings (GTK_TABLE (table), 4); + gtk_box_pack_start (GTK_BOX (editor), table, FALSE, TRUE, 0); + gtk_widget_show (table); + + /* the position labels */ + label = gtk_label_new (_("X:")); + gtk_label_set_xalign (GTK_LABEL (label), 0.0); + gtk_table_attach (GTK_TABLE (table), label, 0, 1, row, row + 1, + GTK_SHRINK | GTK_FILL, GTK_SHRINK, 0, 0); + gtk_widget_show (label); + + label = gtk_label_new (_("Y:")); + gtk_label_set_xalign (GTK_LABEL (label), 0.0); + gtk_table_attach (GTK_TABLE (table), label, 0, 1, row + 1, row + 2, + GTK_SHRINK | GTK_FILL, GTK_SHRINK, 0, 0); + gtk_widget_show (label); + + /* the position size entry */ + spinbutton = gimp_spin_button_new_with_range (0.0, 0.0, 1.0); + gtk_spin_button_set_numeric (GTK_SPIN_BUTTON (spinbutton), TRUE); + gtk_entry_set_width_chars (GTK_ENTRY (spinbutton), 6); + + gradient_tool->endpoint_se = + se = gimp_size_entry_new (1, GIMP_UNIT_PIXEL, "%a", + TRUE, TRUE, FALSE, 6, + GIMP_SIZE_ENTRY_UPDATE_SIZE); + gtk_table_set_row_spacings (GTK_TABLE (se), 4); + gtk_table_set_col_spacings (GTK_TABLE (se), 2); + + gimp_size_entry_add_field (GIMP_SIZE_ENTRY (se), + GTK_SPIN_BUTTON (spinbutton), NULL); + gtk_table_attach_defaults (GTK_TABLE (se), spinbutton, 1, 2, 0, 1); + gtk_widget_show (spinbutton); + + gtk_table_attach (GTK_TABLE (table), se, 1, 2, row, row + 2, + GTK_SHRINK | GTK_FILL | GTK_EXPAND, + GTK_SHRINK | GTK_FILL, + 0, 0); + gtk_widget_show (se); + + gimp_size_entry_set_unit (GIMP_SIZE_ENTRY (se), shell->unit); + + gimp_size_entry_set_resolution (GIMP_SIZE_ENTRY (se), 0, xres, FALSE); + gimp_size_entry_set_resolution (GIMP_SIZE_ENTRY (se), 1, yres, FALSE); + + gimp_size_entry_set_refval_boundaries (GIMP_SIZE_ENTRY (se), 0, + -GIMP_MAX_IMAGE_SIZE, + GIMP_MAX_IMAGE_SIZE); + gimp_size_entry_set_refval_boundaries (GIMP_SIZE_ENTRY (se), 1, + -GIMP_MAX_IMAGE_SIZE, + GIMP_MAX_IMAGE_SIZE); + + gimp_size_entry_set_size (GIMP_SIZE_ENTRY (se), 0, + 0, gimp_image_get_width (image)); + gimp_size_entry_set_size (GIMP_SIZE_ENTRY (se), 1, + 0, gimp_image_get_height (image)); + + g_signal_connect (se, "value-changed", + G_CALLBACK (gimp_gradient_tool_editor_endpoint_se_value_changed), + gradient_tool); + + row += 2; + + /* the color label */ + label = gtk_label_new (_("Color:")); + gtk_label_set_xalign (GTK_LABEL (label), 0.0); + gtk_table_attach (GTK_TABLE (table), label, 0, 1, row, row + 1, + GTK_SHRINK | GTK_FILL, GTK_SHRINK, 0, 0); + gtk_widget_show (label); + + /* the color entry */ + hbox = gimp_gradient_tool_editor_color_entry_new ( + gradient_tool, _("Change Endpoint Color"), DIRECTION_NONE, NULL, + &gradient_tool->endpoint_color_panel, &gradient_tool->endpoint_type_combo); + gtk_table_attach (GTK_TABLE (table), hbox, 1, 2, row, row + 1, + GTK_SHRINK | GTK_FILL | GTK_EXPAND, + GTK_SHRINK | GTK_FILL, + 0, 0); + gtk_widget_show (hbox); + + row++; +} + +static void +gimp_gradient_tool_editor_init_stop_gui (GimpGradientTool *gradient_tool) +{ + GtkWidget *editor; + GtkWidget *table; + GtkWidget *label; + GtkWidget *se; + GtkWidget *table2; + GtkWidget *button; + GtkWidget *hbox; + GtkWidget *separator; + gint row = 0; + + /* the stop editor */ + gradient_tool->stop_editor = + editor = gimp_editor_new (); + gtk_box_pack_start (GTK_BOX (gimp_tool_gui_get_vbox (gradient_tool->gui)), + editor, FALSE, TRUE, 0); + + /* the main table */ + table = gtk_table_new (1, 2, FALSE); + gtk_table_set_row_spacings (GTK_TABLE (table), 4); + gtk_table_set_col_spacings (GTK_TABLE (table), 4); + gtk_box_pack_start (GTK_BOX (editor), table, FALSE, TRUE, 0); + gtk_widget_show (table); + + /* the position label */ + label = gtk_label_new (_("Position:")); + gtk_label_set_xalign (GTK_LABEL (label), 0.0); + gtk_table_attach (GTK_TABLE (table), label, 0, 1, row, row + 1, + GTK_SHRINK | GTK_FILL, GTK_SHRINK, 0, 0); + gtk_widget_show (label); + + /* the position size entry */ + gradient_tool->stop_se = + se = gimp_size_entry_new (1, GIMP_UNIT_PERCENT, "%a", + FALSE, TRUE, FALSE, 6, + GIMP_SIZE_ENTRY_UPDATE_SIZE); + gimp_size_entry_show_unit_menu (GIMP_SIZE_ENTRY (se), FALSE); + gtk_table_attach (GTK_TABLE (table), se, 1, 2, row, row + 1, + GTK_SHRINK | GTK_FILL | GTK_EXPAND, + GTK_SHRINK | GTK_FILL, + 0, 0); + gtk_widget_show (se); + + g_signal_connect (se, "value-changed", + G_CALLBACK (gimp_gradient_tool_editor_stop_se_value_changed), + gradient_tool); + + row++; + + /* the color labels */ + label = gtk_label_new (_("Left color:")); + gtk_label_set_xalign (GTK_LABEL (label), 0.0); + gtk_table_attach (GTK_TABLE (table), label, 0, 1, row, row + 1, + GTK_SHRINK | GTK_FILL, GTK_SHRINK, 0, 0); + gtk_widget_show (label); + + label = gtk_label_new (_("Right color:")); + gtk_label_set_xalign (GTK_LABEL (label), 0.0); + gtk_table_attach (GTK_TABLE (table), label, 0, 1, row + 1, row + 2, + GTK_SHRINK | GTK_FILL, GTK_SHRINK, 0, 0); + gtk_widget_show (label); + + /* the color entries table */ + table2 = gtk_table_new (1, 2, FALSE); + gtk_table_set_row_spacings (GTK_TABLE (table2), 4); + gtk_table_set_col_spacings (GTK_TABLE (table2), 2); + gtk_table_attach (GTK_TABLE (table), table2, 1, 2, row, row + 2, + GTK_SHRINK | GTK_FILL | GTK_EXPAND, + GTK_SHRINK | GTK_FILL, + 0, 0); + gtk_widget_show (table2); + + /* the color entries chain button */ + gradient_tool->stop_chain_button = + button = gimp_chain_button_new (GIMP_CHAIN_RIGHT); + gtk_table_attach (GTK_TABLE (table2), button, 1, 2, 0, 2, + GTK_SHRINK | GTK_FILL, + GTK_SHRINK | GTK_FILL | GTK_EXPAND, + 0, 0); + gtk_widget_show (button); + + /* the color entries */ + hbox = gimp_gradient_tool_editor_color_entry_new ( + gradient_tool, _("Change Stop Color"), DIRECTION_LEFT, button, + &gradient_tool->stop_left_color_panel, &gradient_tool->stop_left_type_combo); + gtk_table_attach (GTK_TABLE (table2), hbox, 0, 1, 0, 1, + GTK_SHRINK | GTK_FILL | GTK_EXPAND, + GTK_SHRINK | GTK_FILL, + 0, 0); + gtk_widget_show (hbox); + + hbox = gimp_gradient_tool_editor_color_entry_new ( + gradient_tool, _("Change Stop Color"), DIRECTION_RIGHT, button, + &gradient_tool->stop_right_color_panel, &gradient_tool->stop_right_type_combo); + gtk_table_attach (GTK_TABLE (table2), hbox, 0, 1, 1, 2, + GTK_SHRINK | GTK_FILL | GTK_EXPAND, + GTK_SHRINK | GTK_FILL, + 0, 0); + gtk_widget_show (hbox); + + row += 2; + + /* the action buttons separator */ + separator = gtk_hseparator_new (); + gtk_table_attach (GTK_TABLE (table), separator, 0, 2, row, row + 1, + GTK_SHRINK | GTK_FILL | GTK_EXPAND, + GTK_SHRINK | GTK_FILL, + 0, 0); + gtk_widget_show (separator); + + row++; + + /* the delete button */ + gimp_editor_add_button (GIMP_EDITOR (editor), + GIMP_ICON_EDIT_DELETE, _("Delete stop"), + NULL, + G_CALLBACK (gimp_gradient_tool_editor_stop_delete_clicked), + NULL, G_OBJECT (gradient_tool)); +} + +static void +gimp_gradient_tool_editor_init_midpoint_gui (GimpGradientTool *gradient_tool) +{ + GtkWidget *editor; + GtkWidget *table; + GtkWidget *label; + GtkWidget *se; + GtkWidget *combo; + GtkWidget *separator; + gint row = 0; + + /* the stop editor */ + gradient_tool->midpoint_editor = + editor = gimp_editor_new (); + gtk_box_pack_start (GTK_BOX (gimp_tool_gui_get_vbox (gradient_tool->gui)), + editor, FALSE, TRUE, 0); + + /* the main table */ + table = gtk_table_new (1, 2, FALSE); + gtk_table_set_row_spacings (GTK_TABLE (table), 4); + gtk_table_set_col_spacings (GTK_TABLE (table), 4); + gtk_box_pack_start (GTK_BOX (editor), table, FALSE, TRUE, 0); + gtk_widget_show (table); + + /* the position label */ + label = gtk_label_new (_("Position:")); + gtk_label_set_xalign (GTK_LABEL (label), 0.0); + gtk_table_attach (GTK_TABLE (table), label, 0, 1, row, row + 1, + GTK_SHRINK | GTK_FILL, GTK_SHRINK, 0, 0); + gtk_widget_show (label); + + /* the position size entry */ + gradient_tool->midpoint_se = + se = gimp_size_entry_new (1, GIMP_UNIT_PERCENT, "%a", + FALSE, TRUE, FALSE, 6, + GIMP_SIZE_ENTRY_UPDATE_SIZE); + gimp_size_entry_show_unit_menu (GIMP_SIZE_ENTRY (se), FALSE); + gtk_table_attach (GTK_TABLE (table), se, 1, 2, row, row + 1, + GTK_SHRINK | GTK_FILL | GTK_EXPAND, + GTK_SHRINK | GTK_FILL, + 0, 0); + gtk_widget_show (se); + + g_signal_connect (se, "value-changed", + G_CALLBACK (gimp_gradient_tool_editor_midpoint_se_value_changed), + gradient_tool); + + row++; + + /* the type label */ + label = gtk_label_new (_("Blending:")); + gtk_label_set_xalign (GTK_LABEL (label), 0.0); + gtk_table_attach (GTK_TABLE (table), label, 0, 1, row, row + 1, + GTK_SHRINK | GTK_FILL, GTK_SHRINK, 0, 0); + gtk_widget_show (label); + + /* the type combo */ + gradient_tool->midpoint_type_combo = + combo = gimp_enum_combo_box_new (GIMP_TYPE_GRADIENT_SEGMENT_TYPE); + gtk_table_attach (GTK_TABLE (table), combo, 1, 2, row, row + 1, + GTK_SHRINK | GTK_FILL | GTK_EXPAND, + GTK_SHRINK | GTK_FILL, + 0, 0); + gtk_widget_show (combo); + + g_signal_connect (combo, "changed", + G_CALLBACK (gimp_gradient_tool_editor_midpoint_type_changed), + gradient_tool); + + row++; + + /* the color label */ + label = gtk_label_new (_("Coloring:")); + gtk_label_set_xalign (GTK_LABEL (label), 0.0); + gtk_table_attach (GTK_TABLE (table), label, 0, 1, row, row + 1, + GTK_SHRINK | GTK_FILL, GTK_SHRINK, 0, 0); + gtk_widget_show (label); + + /* the color combo */ + gradient_tool->midpoint_color_combo = + combo = gimp_enum_combo_box_new (GIMP_TYPE_GRADIENT_SEGMENT_COLOR); + gtk_table_attach (GTK_TABLE (table), combo, 1, 2, row, row + 1, + GTK_SHRINK | GTK_FILL | GTK_EXPAND, + GTK_SHRINK | GTK_FILL, + 0, 0); + gtk_widget_show (combo); + + g_signal_connect (combo, "changed", + G_CALLBACK (gimp_gradient_tool_editor_midpoint_color_changed), + gradient_tool); + + row++; + + /* the action buttons separator */ + separator = gtk_hseparator_new (); + gtk_table_attach (GTK_TABLE (table), separator, 0, 2, row, row + 1, + GTK_SHRINK | GTK_FILL | GTK_EXPAND, + GTK_SHRINK | GTK_FILL, + 0, 0); + gtk_widget_show (separator); + + row++; + + /* the new stop button */ + gradient_tool->midpoint_new_stop_button = + gimp_editor_add_button (GIMP_EDITOR (editor), + GIMP_ICON_DOCUMENT_NEW, _("New stop at midpoint"), + NULL, + G_CALLBACK (gimp_gradient_tool_editor_midpoint_new_stop_clicked), + NULL, G_OBJECT (gradient_tool)); + + /* the center button */ + gradient_tool->midpoint_center_button = + gimp_editor_add_button (GIMP_EDITOR (editor), + GIMP_ICON_CENTER_HORIZONTAL, _("Center midpoint"), + NULL, + G_CALLBACK (gimp_gradient_tool_editor_midpoint_center_clicked), + NULL, G_OBJECT (gradient_tool)); +} + +static void +gimp_gradient_tool_editor_update_endpoint_gui (GimpGradientTool *gradient_tool, + gint selection) +{ + GimpGradientOptions *options = GIMP_GRADIENT_TOOL_GET_OPTIONS (gradient_tool); + GimpPaintOptions *paint_options = GIMP_PAINT_OPTIONS (options); + GimpContext *context = GIMP_CONTEXT (options); + gboolean editable; + GimpGradientSegment *seg; + const gchar *title; + gdouble x; + gdouble y; + GimpRGB color; + GimpGradientColor color_type; + + editable = gimp_gradient_tool_editor_is_gradient_editable (gradient_tool); + + switch (selection) + { + case GIMP_TOOL_LINE_HANDLE_START: + g_object_get (gradient_tool->widget, + "x1", &x, + "y1", &y, + NULL); + break; + + case GIMP_TOOL_LINE_HANDLE_END: + g_object_get (gradient_tool->widget, + "x2", &x, + "y2", &y, + NULL); + break; + + default: + gimp_assert_not_reached (); + } + + /* swap the endpoint handles, if necessary */ + if (paint_options->gradient_options->gradient_reverse) + { + switch (selection) + { + case GIMP_TOOL_LINE_HANDLE_START: + selection = GIMP_TOOL_LINE_HANDLE_END; + break; + + case GIMP_TOOL_LINE_HANDLE_END: + selection = GIMP_TOOL_LINE_HANDLE_START; + break; + } + } + + seg = gimp_gradient_tool_editor_handle_get_segment (gradient_tool, selection); + + switch (selection) + { + case GIMP_TOOL_LINE_HANDLE_START: + title = _("Start Endpoint"); + + gimp_gradient_segment_get_left_flat_color (gradient_tool->gradient, context, + seg, &color); + color_type = seg->left_color_type; + break; + + case GIMP_TOOL_LINE_HANDLE_END: + title = _("End Endpoint"); + + gimp_gradient_segment_get_right_flat_color (gradient_tool->gradient, context, + seg, &color); + color_type = seg->right_color_type; + break; + + default: + gimp_assert_not_reached (); + } + + gimp_tool_gui_set_title (gradient_tool->gui, title); + + gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (gradient_tool->endpoint_se), 0, x); + gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (gradient_tool->endpoint_se), 1, y); + + gimp_color_button_set_color ( + GIMP_COLOR_BUTTON (gradient_tool->endpoint_color_panel), &color); + gimp_int_combo_box_set_active ( + GIMP_INT_COMBO_BOX (gradient_tool->endpoint_type_combo), color_type); + + gtk_widget_set_sensitive (gradient_tool->endpoint_color_panel, editable); + gtk_widget_set_sensitive (gradient_tool->endpoint_type_combo, editable); + + gtk_widget_show (gradient_tool->endpoint_editor); +} + +static void +gimp_gradient_tool_editor_update_stop_gui (GimpGradientTool *gradient_tool, + gint selection) +{ + GimpGradientOptions *options = GIMP_GRADIENT_TOOL_GET_OPTIONS (gradient_tool); + GimpContext *context = GIMP_CONTEXT (options); + gboolean editable; + GimpGradientSegment *seg; + gint index; + gchar *title; + gdouble min; + gdouble max; + gdouble value; + GimpRGB left_color; + GimpGradientColor left_color_type; + GimpRGB right_color; + GimpGradientColor right_color_type; + + editable = gimp_gradient_tool_editor_is_gradient_editable (gradient_tool); + + seg = gimp_gradient_tool_editor_handle_get_segment (gradient_tool, selection); + + index = GPOINTER_TO_INT ( + gimp_tool_line_get_sliders (GIMP_TOOL_LINE (gradient_tool->widget), + NULL)[selection].data); + + title = g_strdup_printf (_("Stop %d"), index + 1); + + min = seg->left; + max = seg->next->right; + value = seg->right; + + gimp_gradient_segment_get_right_flat_color (gradient_tool->gradient, context, + seg, &left_color); + left_color_type = seg->right_color_type; + + gimp_gradient_segment_get_left_flat_color (gradient_tool->gradient, context, + seg->next, &right_color); + right_color_type = seg->next->left_color_type; + + gimp_tool_gui_set_title (gradient_tool->gui, title); + + gimp_size_entry_set_refval_boundaries (GIMP_SIZE_ENTRY (gradient_tool->stop_se), + 0, 100.0 * min, 100.0 * max); + gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (gradient_tool->stop_se), + 0, 100.0 * value); + + gimp_color_button_set_color ( + GIMP_COLOR_BUTTON (gradient_tool->stop_left_color_panel), &left_color); + gimp_int_combo_box_set_active ( + GIMP_INT_COMBO_BOX (gradient_tool->stop_left_type_combo), left_color_type); + + gimp_color_button_set_color ( + GIMP_COLOR_BUTTON (gradient_tool->stop_right_color_panel), &right_color); + gimp_int_combo_box_set_active ( + GIMP_INT_COMBO_BOX (gradient_tool->stop_right_type_combo), right_color_type); + + gtk_widget_set_sensitive (gradient_tool->stop_se, editable); + gtk_widget_set_sensitive (gradient_tool->stop_left_color_panel, editable); + gtk_widget_set_sensitive (gradient_tool->stop_left_type_combo, editable); + gtk_widget_set_sensitive (gradient_tool->stop_right_color_panel, editable); + gtk_widget_set_sensitive (gradient_tool->stop_right_type_combo, editable); + gtk_widget_set_sensitive (gradient_tool->stop_chain_button, editable); + gtk_widget_set_sensitive ( + GTK_WIDGET (gimp_editor_get_button_box (GIMP_EDITOR (gradient_tool->stop_editor))), + editable); + + g_free (title); + + gtk_widget_show (gradient_tool->stop_editor); +} + +static void +gimp_gradient_tool_editor_update_midpoint_gui (GimpGradientTool *gradient_tool, + gint selection) +{ + gboolean editable; + const GimpGradientSegment *seg; + gint index; + gchar *title; + gdouble min; + gdouble max; + gdouble value; + GimpGradientSegmentType type; + GimpGradientSegmentColor color; + + editable = gimp_gradient_tool_editor_is_gradient_editable (gradient_tool); + + seg = gimp_gradient_tool_editor_handle_get_segment (gradient_tool, selection); + + index = GPOINTER_TO_INT ( + gimp_tool_line_get_sliders (GIMP_TOOL_LINE (gradient_tool->widget), + NULL)[selection].data); + + title = g_strdup_printf (_("Midpoint %d"), index + 1); + + min = seg->left; + max = seg->right; + value = seg->middle; + type = seg->type; + color = seg->color; + + gimp_tool_gui_set_title (gradient_tool->gui, title); + + gimp_size_entry_set_refval_boundaries (GIMP_SIZE_ENTRY (gradient_tool->midpoint_se), + 0, 100.0 * min, 100.0 * max); + gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (gradient_tool->midpoint_se), + 0, 100.0 * value); + + gimp_int_combo_box_set_active ( + GIMP_INT_COMBO_BOX (gradient_tool->midpoint_type_combo), type); + + gimp_int_combo_box_set_active ( + GIMP_INT_COMBO_BOX (gradient_tool->midpoint_color_combo), color); + + gtk_widget_set_sensitive (gradient_tool->midpoint_new_stop_button, + value > min + EPSILON && value < max - EPSILON); + gtk_widget_set_sensitive (gradient_tool->midpoint_center_button, + fabs (value - (min + max) / 2.0) > EPSILON); + + gtk_widget_set_sensitive (gradient_tool->midpoint_se, editable); + gtk_widget_set_sensitive (gradient_tool->midpoint_type_combo, editable); + gtk_widget_set_sensitive (gradient_tool->midpoint_color_combo, editable); + gtk_widget_set_sensitive ( + GTK_WIDGET (gimp_editor_get_button_box (GIMP_EDITOR (gradient_tool->midpoint_editor))), + editable); + + g_free (title); + + gtk_widget_show (gradient_tool->midpoint_editor); +} + +static void +gimp_gradient_tool_editor_update_gui (GimpGradientTool *gradient_tool) +{ + GimpGradientOptions *options = GIMP_GRADIENT_TOOL_GET_OPTIONS (gradient_tool); + + if (gradient_tool->gradient && gradient_tool->widget && ! options->instant) + { + gint selection; + + selection = + gimp_tool_line_get_selection (GIMP_TOOL_LINE (gradient_tool->widget)); + + if (selection != GIMP_TOOL_LINE_HANDLE_NONE) + { + if (! gradient_tool->gui) + { + GimpDisplayShell *shell; + + shell = gimp_tool_widget_get_shell (gradient_tool->widget); + + gradient_tool->gui = + gimp_tool_gui_new (GIMP_TOOL (gradient_tool)->tool_info, + NULL, NULL, NULL, NULL, + gtk_widget_get_screen (GTK_WIDGET (shell)), + gimp_widget_get_monitor (GTK_WIDGET (shell)), + TRUE, + + _("_Close"), GTK_RESPONSE_CLOSE, + + NULL); + + gimp_tool_gui_set_shell (gradient_tool->gui, shell); + gimp_tool_gui_set_viewable (gradient_tool->gui, + GIMP_VIEWABLE (gradient_tool->gradient)); + gimp_tool_gui_set_auto_overlay (gradient_tool->gui, TRUE); + + g_signal_connect (gradient_tool->gui, "response", + G_CALLBACK (gimp_gradient_tool_editor_gui_response), + gradient_tool); + + gimp_gradient_tool_editor_init_endpoint_gui (gradient_tool); + gimp_gradient_tool_editor_init_stop_gui (gradient_tool); + gimp_gradient_tool_editor_init_midpoint_gui (gradient_tool); + } + + gimp_gradient_tool_editor_block_handlers (gradient_tool); + + if (gimp_gradient_tool_editor_handle_is_endpoint (gradient_tool, selection)) + gimp_gradient_tool_editor_update_endpoint_gui (gradient_tool, selection); + else + gtk_widget_hide (gradient_tool->endpoint_editor); + + if (gimp_gradient_tool_editor_handle_is_stop (gradient_tool, selection)) + gimp_gradient_tool_editor_update_stop_gui (gradient_tool, selection); + else + gtk_widget_hide (gradient_tool->stop_editor); + + if (gimp_gradient_tool_editor_handle_is_midpoint (gradient_tool, selection)) + gimp_gradient_tool_editor_update_midpoint_gui (gradient_tool, selection); + else + gtk_widget_hide (gradient_tool->midpoint_editor); + + gimp_gradient_tool_editor_unblock_handlers (gradient_tool); + + gimp_tool_gui_show (gradient_tool->gui); + + return; + } + } + + if (gradient_tool->gui) + gimp_tool_gui_hide (gradient_tool->gui); +} + +static GradientInfo * +gimp_gradient_tool_editor_gradient_info_new (GimpGradientTool *gradient_tool) +{ + GradientInfo *info = g_slice_new (GradientInfo); + + info->start_x = gradient_tool->start_x; + info->start_y = gradient_tool->start_y; + info->end_x = gradient_tool->end_x; + info->end_y = gradient_tool->end_y; + + info->gradient = NULL; + + info->added_handle = GIMP_TOOL_LINE_HANDLE_NONE; + info->removed_handle = GIMP_TOOL_LINE_HANDLE_NONE; + info->selected_handle = GIMP_TOOL_LINE_HANDLE_NONE; + + return info; +} + +static void +gimp_gradient_tool_editor_gradient_info_free (GradientInfo *info) +{ + if (info->gradient) + g_object_unref (info->gradient); + + g_slice_free (GradientInfo, info); +} + +static void +gimp_gradient_tool_editor_gradient_info_apply (GimpGradientTool *gradient_tool, + const GradientInfo *info, + gboolean set_selection) +{ + gint selection; + + gimp_assert (gradient_tool->widget != NULL); + gimp_assert (gradient_tool->gradient != NULL); + + /* pick the handle to select */ + if (info->gradient) + { + if (info->removed_handle != GIMP_TOOL_LINE_HANDLE_NONE) + { + /* we're undoing a stop-deletion or midpoint-to-stop operation; + * select the removed handle + */ + selection = info->removed_handle; + } + else if (info->added_handle != GIMP_TOOL_LINE_HANDLE_NONE) + { + /* we're undoing a stop addition operation */ + gimp_assert (gimp_gradient_tool_editor_handle_is_stop (gradient_tool, + info->added_handle)); + + selection = + gimp_tool_line_get_selection (GIMP_TOOL_LINE (gradient_tool->widget)); + + /* if the selected handle is a stop... */ + if (gimp_gradient_tool_editor_handle_is_stop (gradient_tool, selection)) + { + /* if the added handle is selected, clear the selection */ + if (selection == info->added_handle) + selection = GIMP_TOOL_LINE_HANDLE_NONE; + /* otherwise, keep the currently selected stop, possibly + * adjusting its handle index + */ + else if (selection > info->added_handle) + selection--; + } + /* otherwise, if the selected handle is a midpoint... */ + else if (gimp_gradient_tool_editor_handle_is_midpoint (gradient_tool, selection)) + { + const GimpControllerSlider *sliders; + gint seg_i; + + sliders = + gimp_tool_line_get_sliders (GIMP_TOOL_LINE (gradient_tool->widget), + NULL); + + seg_i = GPOINTER_TO_INT (sliders[selection].data); + + /* if the midpoint belongs to one of the two segments incident to + * the added stop, clear the selection + */ + if (seg_i == info->added_handle || + seg_i == info->added_handle + 1) + { + selection = GIMP_TOOL_LINE_HANDLE_NONE; + } + /* otherwise, keep the currently selected stop, adjusting its + * handle index + */ + else + { + /* midpoint handles follow stop handles; since we removed a + * stop, we must decrement the handle index + */ + selection--; + + if (seg_i > info->added_handle) + selection--; + } + } + /* otherwise, don't change the selection */ + else + { + set_selection = FALSE; + } + } + else if (info->selected_handle != GIMP_TOOL_LINE_HANDLE_NONE) + { + /* we're undoing a property change operation; select the handle + * corresponding to the affected object + */ + selection = info->selected_handle; + } + else + { + /* something went wrong... */ + g_warn_if_reached (); + + set_selection = FALSE; + } + } + else if ((info->start_x != gradient_tool->start_x || + info->start_y != gradient_tool->start_y) && + (info->end_x == gradient_tool->end_x && + info->end_y == gradient_tool->end_y)) + { + /* we're undoing a start-endpoint move operation; select the start + * endpoint + */ + selection = GIMP_TOOL_LINE_HANDLE_START; + } + else if ((info->end_x != gradient_tool->end_x || + info->end_y != gradient_tool->end_y) && + (info->start_x == gradient_tool->start_x && + info->start_y == gradient_tool->start_y)) + + { + /* we're undoing am end-endpoint move operation; select the end + * endpoint + */ + selection = GIMP_TOOL_LINE_HANDLE_END; + } + else + { + /* we're undoing a line move operation; don't change the selection */ + set_selection = FALSE; + } + + gimp_gradient_tool_editor_block_handlers (gradient_tool); + + g_object_set (gradient_tool->widget, + "x1", info->start_x, + "y1", info->start_y, + "x2", info->end_x, + "y2", info->end_y, + NULL); + + if (info->gradient) + { + gimp_gradient_tool_editor_freeze_gradient (gradient_tool); + + gimp_data_copy (GIMP_DATA (gradient_tool->gradient), + GIMP_DATA (info->gradient)); + + gimp_gradient_tool_editor_thaw_gradient (gradient_tool); + } + + if (set_selection) + { + gimp_tool_line_set_selection (GIMP_TOOL_LINE (gradient_tool->widget), + selection); + } + + gimp_gradient_tool_editor_update_gui (gradient_tool); + + gimp_gradient_tool_editor_unblock_handlers (gradient_tool); +} + +static gboolean +gimp_gradient_tool_editor_gradient_info_is_trivial (GimpGradientTool *gradient_tool, + const GradientInfo *info) +{ + const GimpGradientSegment *seg1; + const GimpGradientSegment *seg2; + + if (info->start_x != gradient_tool->start_x || + info->start_y != gradient_tool->start_y || + info->end_x != gradient_tool->end_x || + info->end_y != gradient_tool->end_y) + { + return FALSE; + } + + if (info->gradient) + { + for (seg1 = info->gradient->segments, seg2 = gradient_tool->gradient->segments; + seg1 && seg2; + seg1 = seg1->next, seg2 = seg2->next) + { + if (memcmp (seg1, seg2, G_STRUCT_OFFSET (GimpGradientSegment, prev))) + return FALSE; + } + + if (seg1 || seg2) + return FALSE; + } + + return TRUE; +} + + +/* public functions */ + +void +gimp_gradient_tool_editor_options_notify (GimpGradientTool *gradient_tool, + GimpToolOptions *options, + const GParamSpec *pspec) +{ + if (! strcmp (pspec->name, "modify-active")) + { + gimp_gradient_tool_editor_update_sliders (gradient_tool); + gimp_gradient_tool_editor_update_gui (gradient_tool); + } + else if (! strcmp (pspec->name, "gradient-reverse")) + { + gimp_gradient_tool_editor_update_sliders (gradient_tool); + + /* if an endpoint is selected, swap the selected endpoint */ + if (gradient_tool->widget) + { + gint selection; + + selection = + gimp_tool_line_get_selection (GIMP_TOOL_LINE (gradient_tool->widget)); + + switch (selection) + { + case GIMP_TOOL_LINE_HANDLE_START: + gimp_tool_line_set_selection (GIMP_TOOL_LINE (gradient_tool->widget), + GIMP_TOOL_LINE_HANDLE_END); + break; + + case GIMP_TOOL_LINE_HANDLE_END: + gimp_tool_line_set_selection (GIMP_TOOL_LINE (gradient_tool->widget), + GIMP_TOOL_LINE_HANDLE_START); + break; + } + } + } + else if (gradient_tool->render_node && + gegl_node_find_property (gradient_tool->render_node, pspec->name)) + { + gimp_gradient_tool_editor_update_sliders (gradient_tool); + } +} + +void +gimp_gradient_tool_editor_start (GimpGradientTool *gradient_tool) +{ + g_signal_connect (gradient_tool->widget, "can-add-slider", + G_CALLBACK (gimp_gradient_tool_editor_line_can_add_slider), + gradient_tool); + g_signal_connect (gradient_tool->widget, "add-slider", + G_CALLBACK (gimp_gradient_tool_editor_line_add_slider), + gradient_tool); + g_signal_connect (gradient_tool->widget, "prepare-to-remove-slider", + G_CALLBACK (gimp_gradient_tool_editor_line_prepare_to_remove_slider), + gradient_tool); + g_signal_connect (gradient_tool->widget, "remove-slider", + G_CALLBACK (gimp_gradient_tool_editor_line_remove_slider), + gradient_tool); + g_signal_connect (gradient_tool->widget, "selection-changed", + G_CALLBACK (gimp_gradient_tool_editor_line_selection_changed), + gradient_tool); + g_signal_connect (gradient_tool->widget, "handle-clicked", + G_CALLBACK (gimp_gradient_tool_editor_line_handle_clicked), + gradient_tool); +} + +void +gimp_gradient_tool_editor_halt (GimpGradientTool *gradient_tool) +{ + g_clear_object (&gradient_tool->gui); + + gradient_tool->edit_count = 0; + + if (gradient_tool->undo_stack) + { + g_slist_free_full (gradient_tool->undo_stack, + (GDestroyNotify) gimp_gradient_tool_editor_gradient_info_free); + gradient_tool->undo_stack = NULL; + } + + if (gradient_tool->redo_stack) + { + g_slist_free_full (gradient_tool->redo_stack, + (GDestroyNotify) gimp_gradient_tool_editor_gradient_info_free); + gradient_tool->redo_stack = NULL; + } + + if (gradient_tool->flush_idle_id) + { + g_source_remove (gradient_tool->flush_idle_id); + gradient_tool->flush_idle_id = 0; + } +} + +gboolean +gimp_gradient_tool_editor_line_changed (GimpGradientTool *gradient_tool) +{ + GimpGradientOptions *options = GIMP_GRADIENT_TOOL_GET_OPTIONS (gradient_tool); + GimpPaintOptions *paint_options = GIMP_PAINT_OPTIONS (options); + gdouble offset = options->offset / 100.0; + const GimpControllerSlider *sliders; + gint n_sliders; + gint i; + GimpGradientSegment *seg; + gboolean changed = FALSE; + + if (gimp_gradient_tool_editor_are_handlers_blocked (gradient_tool)) + return FALSE; + + if (! gradient_tool->gradient || offset == 1.0) + return FALSE; + + sliders = gimp_tool_line_get_sliders (GIMP_TOOL_LINE (gradient_tool->widget), + &n_sliders); + + if (n_sliders == 0) + return FALSE; + + /* update the midpoints first, since moving the gradient stops may change the + * gradient's midpoints w.r.t. the sliders, but not the other way around. + */ + for (seg = gradient_tool->gradient->segments, i = n_sliders / 2; + seg; + seg = seg->next, i++) + { + gdouble value; + + value = sliders[i].value; + + /* adjust slider value according to the offset */ + value = (value - offset) / (1.0 - offset); + + /* flip the slider value, if necessary */ + if (paint_options->gradient_options->gradient_reverse) + value = 1.0 - value; + + if (fabs (value - seg->middle) > EPSILON) + { + if (! changed) + { + gimp_gradient_tool_editor_start_edit (gradient_tool); + gimp_gradient_tool_editor_freeze_gradient (gradient_tool); + + /* refetch the segment, since the gradient might have changed */ + seg = gimp_gradient_tool_editor_handle_get_segment (gradient_tool, i); + + changed = TRUE; + } + + seg->middle = value; + } + } + + /* update the gradient stops */ + for (seg = gradient_tool->gradient->segments, i = 0; + seg->next; + seg = seg->next, i++) + { + gdouble value; + + value = sliders[i].value; + + /* adjust slider value according to the offset */ + value = (value - offset) / (1.0 - offset); + + /* flip the slider value, if necessary */ + if (paint_options->gradient_options->gradient_reverse) + value = 1.0 - value; + + if (fabs (value - seg->right) > EPSILON) + { + if (! changed) + { + gimp_gradient_tool_editor_start_edit (gradient_tool); + gimp_gradient_tool_editor_freeze_gradient (gradient_tool); + + /* refetch the segment, since the gradient might have changed */ + seg = gimp_gradient_tool_editor_handle_get_segment (gradient_tool, i); + + changed = TRUE; + } + + gimp_gradient_segment_range_compress (gradient_tool->gradient, + seg, seg, + seg->left, value); + gimp_gradient_segment_range_compress (gradient_tool->gradient, + seg->next, seg->next, + value, seg->next->right); + } + } + + if (changed) + { + gimp_gradient_tool_editor_thaw_gradient (gradient_tool); + gimp_gradient_tool_editor_end_edit (gradient_tool, FALSE); + } + + gimp_gradient_tool_editor_update_gui (gradient_tool); + + return changed; +} + +void +gimp_gradient_tool_editor_fg_bg_changed (GimpGradientTool *gradient_tool) +{ + gimp_gradient_tool_editor_update_gui (gradient_tool); +} + +void +gimp_gradient_tool_editor_gradient_dirty (GimpGradientTool *gradient_tool) +{ + if (gimp_gradient_tool_editor_are_handlers_blocked (gradient_tool)) + return; + + gimp_gradient_tool_editor_purge_gradient (gradient_tool); +} + +void +gimp_gradient_tool_editor_gradient_changed (GimpGradientTool *gradient_tool) +{ + GimpGradientOptions *options = GIMP_GRADIENT_TOOL_GET_OPTIONS (gradient_tool); + GimpContext *context = GIMP_CONTEXT (options); + + if (options->modify_active_frame) + { + gtk_widget_set_sensitive (options->modify_active_frame, + gradient_tool->gradient != + gimp_gradients_get_custom (context->gimp)); + } + + if (options->modify_active_hint) + { + gtk_widget_set_visible (options->modify_active_hint, + gradient_tool->gradient && + ! gimp_data_is_writable (GIMP_DATA (gradient_tool->gradient))); + } + + if (gimp_gradient_tool_editor_are_handlers_blocked (gradient_tool)) + return; + + gimp_gradient_tool_editor_purge_gradient (gradient_tool); +} + +const gchar * +gimp_gradient_tool_editor_can_undo (GimpGradientTool *gradient_tool) +{ + if (! gradient_tool->undo_stack || gradient_tool->edit_count > 0) + return NULL; + + return _("Gradient Step"); +} + +const gchar * +gimp_gradient_tool_editor_can_redo (GimpGradientTool *gradient_tool) +{ + if (! gradient_tool->redo_stack || gradient_tool->edit_count > 0) + return NULL; + + return _("Gradient Step"); +} + +gboolean +gimp_gradient_tool_editor_undo (GimpGradientTool *gradient_tool) +{ + GimpTool *tool = GIMP_TOOL (gradient_tool); + GradientInfo *info; + GradientInfo *new_info; + + gimp_assert (gradient_tool->undo_stack != NULL); + gimp_assert (gradient_tool->edit_count == 0); + + info = gradient_tool->undo_stack->data; + + new_info = gimp_gradient_tool_editor_gradient_info_new (gradient_tool); + + if (info->gradient) + { + new_info->gradient = + GIMP_GRADIENT (gimp_data_duplicate (GIMP_DATA (gradient_tool->gradient))); + + /* swap the added and removed handles, so that gradient_info_apply() does + * the right thing on redo + */ + new_info->added_handle = info->removed_handle; + new_info->removed_handle = info->added_handle; + new_info->selected_handle = info->selected_handle; + } + + gradient_tool->undo_stack = g_slist_remove (gradient_tool->undo_stack, info); + gradient_tool->redo_stack = g_slist_prepend (gradient_tool->redo_stack, new_info); + + gimp_gradient_tool_editor_gradient_info_apply (gradient_tool, info, TRUE); + gimp_gradient_tool_editor_gradient_info_free (info); + + /* the initial state of the gradient tool is not useful; we might as well halt */ + if (! gradient_tool->undo_stack) + gimp_tool_control (tool, GIMP_TOOL_ACTION_HALT, tool->display); + + return TRUE; +} + +gboolean +gimp_gradient_tool_editor_redo (GimpGradientTool *gradient_tool) +{ + GradientInfo *info; + GradientInfo *new_info; + + gimp_assert (gradient_tool->redo_stack != NULL); + gimp_assert (gradient_tool->edit_count == 0); + + info = gradient_tool->redo_stack->data; + + new_info = gimp_gradient_tool_editor_gradient_info_new (gradient_tool); + + if (info->gradient) + { + new_info->gradient = + GIMP_GRADIENT (gimp_data_duplicate (GIMP_DATA (gradient_tool->gradient))); + + /* swap the added and removed handles, so that gradient_info_apply() does + * the right thing on undo + */ + new_info->added_handle = info->removed_handle; + new_info->removed_handle = info->added_handle; + new_info->selected_handle = info->selected_handle; + } + + gradient_tool->redo_stack = g_slist_remove (gradient_tool->redo_stack, info); + gradient_tool->undo_stack = g_slist_prepend (gradient_tool->undo_stack, new_info); + + gimp_gradient_tool_editor_gradient_info_apply (gradient_tool, info, TRUE); + gimp_gradient_tool_editor_gradient_info_free (info); + + return TRUE; +} + +void +gimp_gradient_tool_editor_start_edit (GimpGradientTool *gradient_tool) +{ + if (gradient_tool->edit_count++ == 0) + { + GradientInfo *info; + + info = gimp_gradient_tool_editor_gradient_info_new (gradient_tool); + + gradient_tool->undo_stack = g_slist_prepend (gradient_tool->undo_stack, info); + + /* update the undo actions / menu items */ + if (! gradient_tool->flush_idle_id) + { + gradient_tool->flush_idle_id = + g_idle_add ((GSourceFunc) gimp_gradient_tool_editor_flush_idle, + gradient_tool); + } + } +} + +void +gimp_gradient_tool_editor_end_edit (GimpGradientTool *gradient_tool, + gboolean cancel) +{ + /* can happen when halting using esc */ + if (gradient_tool->edit_count == 0) + return; + + if (--gradient_tool->edit_count == 0) + { + GradientInfo *info = gradient_tool->undo_stack->data; + + info->selected_handle = + gimp_tool_line_get_selection (GIMP_TOOL_LINE (gradient_tool->widget)); + + if (cancel || + gimp_gradient_tool_editor_gradient_info_is_trivial (gradient_tool, info)) + { + /* if the edit is canceled, or if nothing changed, undo the last + * step + */ + gimp_gradient_tool_editor_gradient_info_apply (gradient_tool, info, FALSE); + + gradient_tool->undo_stack = g_slist_remove (gradient_tool->undo_stack, + info); + gimp_gradient_tool_editor_gradient_info_free (info); + } + else + { + /* otherwise, blow the redo stack */ + g_slist_free_full (gradient_tool->redo_stack, + (GDestroyNotify) gimp_gradient_tool_editor_gradient_info_free); + gradient_tool->redo_stack = NULL; + } + + /* update the undo actions / menu items */ + if (! gradient_tool->flush_idle_id) + { + gradient_tool->flush_idle_id = + g_idle_add ((GSourceFunc) gimp_gradient_tool_editor_flush_idle, + gradient_tool); + } + } +} |