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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 03:13:10 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 03:13:10 +0000 |
commit | 3c57dd931145d43f2b0aef96c4d178135956bf91 (patch) | |
tree | 3de698981e9f0cc2c4f9569b19a5f3595e741f6b /app/display/gimptoolline.c | |
parent | Initial commit. (diff) | |
download | gimp-3c57dd931145d43f2b0aef96c4d178135956bf91.tar.xz gimp-3c57dd931145d43f2b0aef96c4d178135956bf91.zip |
Adding upstream version 2.10.36.upstream/2.10.36
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | app/display/gimptoolline.c | 1796 |
1 files changed, 1796 insertions, 0 deletions
diff --git a/app/display/gimptoolline.c b/app/display/gimptoolline.c new file mode 100644 index 0000000..271f926 --- /dev/null +++ b/app/display/gimptoolline.c @@ -0,0 +1,1796 @@ +/* GIMP - The GNU Image Manipulation Program + * Copyright (C) 1995 Spencer Kimball and Peter Mattis + * + * gimptoolline.c + * Copyright (C) 2017 Michael Natterer <mitch@gimp.org> + * + * Major improvements for interactivity + * Copyright (C) 2014 Michael Henning <drawoc@darkrefraction.com> + * + * 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 "display-types.h" + +#include "core/gimp-utils.h" +#include "core/gimpmarshal.h" + +#include "widgets/gimpwidgets-utils.h" + +#include "gimpcanvasgroup.h" +#include "gimpcanvashandle.h" +#include "gimpcanvasline.h" +#include "gimpdisplayshell.h" +#include "gimpdisplayshell-cursor.h" +#include "gimpdisplayshell-utils.h" +#include "gimptoolline.h" + +#include "gimp-intl.h" + + +#define SHOW_LINE TRUE +#define GRAB_LINE_MASK GDK_MOD1_MASK +#define ENDPOINT_HANDLE_TYPE GIMP_HANDLE_CROSS +#define ENDPOINT_HANDLE_SIZE GIMP_CANVAS_HANDLE_SIZE_CROSS +#define SLIDER_HANDLE_TYPE GIMP_HANDLE_FILLED_DIAMOND +#define SLIDER_HANDLE_SIZE (ENDPOINT_HANDLE_SIZE * 2 / 3) +#define HANDLE_CIRCLE_SCALE 1.8 +#define LINE_VICINITY ((gint) (SLIDER_HANDLE_SIZE * HANDLE_CIRCLE_SCALE) / 2) +#define SLIDER_TEAR_DISTANCE (5 * LINE_VICINITY) + + +/* hover-only "handles" */ +#define HOVER_NEW_SLIDER (GIMP_TOOL_LINE_HANDLE_NONE - 1) + + +typedef enum +{ + GRAB_NONE, + GRAB_SELECTION, + GRAB_LINE +} GimpToolLineGrab; + +enum +{ + PROP_0, + PROP_X1, + PROP_Y1, + PROP_X2, + PROP_Y2, + PROP_SLIDERS, + PROP_SELECTION, + PROP_STATUS_TITLE, +}; + +enum +{ + CAN_ADD_SLIDER, + ADD_SLIDER, + PREPARE_TO_REMOVE_SLIDER, + REMOVE_SLIDER, + SELECTION_CHANGED, + HANDLE_CLICKED, + LAST_SIGNAL +}; + +struct _GimpToolLinePrivate +{ + gdouble x1; + gdouble y1; + gdouble x2; + gdouble y2; + GArray *sliders; + gint selection; + gchar *status_title; + + gdouble saved_x1; + gdouble saved_y1; + gdouble saved_x2; + gdouble saved_y2; + gdouble saved_slider_value; + + gdouble mouse_x; + gdouble mouse_y; + gint hover; + gdouble new_slider_value; + gboolean remove_slider; + GimpToolLineGrab grab; + + GimpCanvasItem *line; + GimpCanvasItem *start_handle; + GimpCanvasItem *end_handle; + GimpCanvasItem *slider_group; + GArray *slider_handles; + GimpCanvasItem *handle_circle; +}; + + +/* local function prototypes */ + +static void gimp_tool_line_constructed (GObject *object); +static void gimp_tool_line_finalize (GObject *object); +static void gimp_tool_line_set_property (GObject *object, + guint property_id, + const GValue *value, + GParamSpec *pspec); +static void gimp_tool_line_get_property (GObject *object, + guint property_id, + GValue *value, + GParamSpec *pspec); + +static void gimp_tool_line_changed (GimpToolWidget *widget); +static void gimp_tool_line_focus_changed (GimpToolWidget *widget); +static gint gimp_tool_line_button_press (GimpToolWidget *widget, + const GimpCoords *coords, + guint32 time, + GdkModifierType state, + GimpButtonPressType press_type); +static void gimp_tool_line_button_release (GimpToolWidget *widget, + const GimpCoords *coords, + guint32 time, + GdkModifierType state, + GimpButtonReleaseType release_type); +static void gimp_tool_line_motion (GimpToolWidget *widget, + const GimpCoords *coords, + guint32 time, + GdkModifierType state); +static GimpHit gimp_tool_line_hit (GimpToolWidget *widget, + const GimpCoords *coords, + GdkModifierType state, + gboolean proximity); +static void gimp_tool_line_hover (GimpToolWidget *widget, + const GimpCoords *coords, + GdkModifierType state, + gboolean proximity); +static void gimp_tool_line_leave_notify (GimpToolWidget *widget); +static gboolean gimp_tool_line_key_press (GimpToolWidget *widget, + GdkEventKey *kevent); +static void gimp_tool_line_motion_modifier (GimpToolWidget *widget, + GdkModifierType key, + gboolean press, + GdkModifierType state); +static gboolean gimp_tool_line_get_cursor (GimpToolWidget *widget, + const GimpCoords *coords, + GdkModifierType state, + GimpCursorType *cursor, + GimpToolCursorType *tool_cursor, + GimpCursorModifier *modifier); + +static gint gimp_tool_line_get_hover (GimpToolLine *line, + const GimpCoords *coords, + GdkModifierType state); +static GimpControllerSlider * + gimp_tool_line_get_slider (GimpToolLine *line, + gint slider); +static GimpCanvasItem * + gimp_tool_line_get_handle (GimpToolLine *line, + gint handle); +static gdouble gimp_tool_line_project_point (GimpToolLine *line, + gdouble x, + gdouble y, + gboolean constrain, + gdouble *dist); + +static gboolean + gimp_tool_line_selection_motion (GimpToolLine *line, + gboolean constrain); + +static void gimp_tool_line_update_handles (GimpToolLine *line); +static void gimp_tool_line_update_circle (GimpToolLine *line); +static void gimp_tool_line_update_hilight (GimpToolLine *line); +static void gimp_tool_line_update_status (GimpToolLine *line, + GdkModifierType state, + gboolean proximity); + +static gboolean gimp_tool_line_handle_hit (GimpCanvasItem *handle, + gdouble x, + gdouble y, + gdouble *min_dist); + + +G_DEFINE_TYPE_WITH_PRIVATE (GimpToolLine, gimp_tool_line, GIMP_TYPE_TOOL_WIDGET) + +#define parent_class gimp_tool_line_parent_class + +static guint line_signals[LAST_SIGNAL] = { 0, }; + + +static void +gimp_tool_line_class_init (GimpToolLineClass *klass) +{ + GObjectClass *object_class = G_OBJECT_CLASS (klass); + GimpToolWidgetClass *widget_class = GIMP_TOOL_WIDGET_CLASS (klass); + + object_class->constructed = gimp_tool_line_constructed; + object_class->finalize = gimp_tool_line_finalize; + object_class->set_property = gimp_tool_line_set_property; + object_class->get_property = gimp_tool_line_get_property; + + widget_class->changed = gimp_tool_line_changed; + widget_class->focus_changed = gimp_tool_line_focus_changed; + widget_class->button_press = gimp_tool_line_button_press; + widget_class->button_release = gimp_tool_line_button_release; + widget_class->motion = gimp_tool_line_motion; + widget_class->hit = gimp_tool_line_hit; + widget_class->hover = gimp_tool_line_hover; + widget_class->leave_notify = gimp_tool_line_leave_notify; + widget_class->key_press = gimp_tool_line_key_press; + widget_class->motion_modifier = gimp_tool_line_motion_modifier; + widget_class->get_cursor = gimp_tool_line_get_cursor; + + line_signals[CAN_ADD_SLIDER] = + g_signal_new ("can-add-slider", + G_TYPE_FROM_CLASS (klass), + G_SIGNAL_RUN_LAST, + G_STRUCT_OFFSET (GimpToolLineClass, can_add_slider), + NULL, NULL, + gimp_marshal_BOOLEAN__DOUBLE, + G_TYPE_BOOLEAN, 1, + G_TYPE_DOUBLE); + + line_signals[ADD_SLIDER] = + g_signal_new ("add-slider", + G_TYPE_FROM_CLASS (klass), + G_SIGNAL_RUN_LAST, + G_STRUCT_OFFSET (GimpToolLineClass, add_slider), + NULL, NULL, + gimp_marshal_INT__DOUBLE, + G_TYPE_INT, 1, + G_TYPE_DOUBLE); + + line_signals[PREPARE_TO_REMOVE_SLIDER] = + g_signal_new ("prepare-to-remove-slider", + G_TYPE_FROM_CLASS (klass), + G_SIGNAL_RUN_FIRST, + G_STRUCT_OFFSET (GimpToolLineClass, prepare_to_remove_slider), + NULL, NULL, + gimp_marshal_VOID__INT_BOOLEAN, + G_TYPE_NONE, 2, + G_TYPE_INT, + G_TYPE_BOOLEAN); + + line_signals[REMOVE_SLIDER] = + g_signal_new ("remove-slider", + G_TYPE_FROM_CLASS (klass), + G_SIGNAL_RUN_FIRST, + G_STRUCT_OFFSET (GimpToolLineClass, remove_slider), + NULL, NULL, + gimp_marshal_VOID__INT, + G_TYPE_NONE, 1, + G_TYPE_INT); + + line_signals[SELECTION_CHANGED] = + g_signal_new ("selection-changed", + G_TYPE_FROM_CLASS (klass), + G_SIGNAL_RUN_FIRST, + G_STRUCT_OFFSET (GimpToolLineClass, selection_changed), + NULL, NULL, + g_cclosure_marshal_VOID__VOID, + G_TYPE_NONE, 0); + + line_signals[HANDLE_CLICKED] = + g_signal_new ("handle-clicked", + G_TYPE_FROM_CLASS (klass), + G_SIGNAL_RUN_LAST, + G_STRUCT_OFFSET (GimpToolLineClass, handle_clicked), + NULL, NULL, + gimp_marshal_BOOLEAN__INT_UINT_ENUM, + G_TYPE_BOOLEAN, 3, + G_TYPE_INT, + G_TYPE_UINT, + GIMP_TYPE_BUTTON_PRESS_TYPE); + + g_object_class_install_property (object_class, PROP_X1, + g_param_spec_double ("x1", NULL, NULL, + -GIMP_MAX_IMAGE_SIZE, + GIMP_MAX_IMAGE_SIZE, 0, + GIMP_PARAM_READWRITE | + G_PARAM_CONSTRUCT)); + + g_object_class_install_property (object_class, PROP_Y1, + g_param_spec_double ("y1", NULL, NULL, + -GIMP_MAX_IMAGE_SIZE, + GIMP_MAX_IMAGE_SIZE, 0, + GIMP_PARAM_READWRITE | + G_PARAM_CONSTRUCT)); + + g_object_class_install_property (object_class, PROP_X2, + g_param_spec_double ("x2", NULL, NULL, + -GIMP_MAX_IMAGE_SIZE, + GIMP_MAX_IMAGE_SIZE, 0, + GIMP_PARAM_READWRITE | + G_PARAM_CONSTRUCT)); + + g_object_class_install_property (object_class, PROP_Y2, + g_param_spec_double ("y2", NULL, NULL, + -GIMP_MAX_IMAGE_SIZE, + GIMP_MAX_IMAGE_SIZE, 0, + GIMP_PARAM_READWRITE | + G_PARAM_CONSTRUCT)); + + g_object_class_install_property (object_class, PROP_SLIDERS, + g_param_spec_boxed ("sliders", NULL, NULL, + G_TYPE_ARRAY, + GIMP_PARAM_READWRITE)); + + g_object_class_install_property (object_class, PROP_SELECTION, + g_param_spec_int ("selection", NULL, NULL, + GIMP_TOOL_LINE_HANDLE_NONE, + G_MAXINT, + GIMP_TOOL_LINE_HANDLE_NONE, + GIMP_PARAM_READWRITE | + G_PARAM_CONSTRUCT)); + + g_object_class_install_property (object_class, PROP_STATUS_TITLE, + g_param_spec_string ("status-title", + NULL, NULL, + _("Line: "), + GIMP_PARAM_READWRITE | + G_PARAM_CONSTRUCT)); +} + +static void +gimp_tool_line_init (GimpToolLine *line) +{ + GimpToolLinePrivate *private; + + private = line->private = gimp_tool_line_get_instance_private (line); + + private->sliders = g_array_new (FALSE, FALSE, sizeof (GimpControllerSlider)); + + private->selection = GIMP_TOOL_LINE_HANDLE_NONE; + private->hover = GIMP_TOOL_LINE_HANDLE_NONE; + private->grab = GRAB_NONE; + + private->slider_handles = g_array_new (FALSE, TRUE, + sizeof (GimpCanvasItem *)); +} + +static void +gimp_tool_line_constructed (GObject *object) +{ + GimpToolLine *line = GIMP_TOOL_LINE (object); + GimpToolWidget *widget = GIMP_TOOL_WIDGET (object); + GimpToolLinePrivate *private = line->private; + + G_OBJECT_CLASS (parent_class)->constructed (object); + + private->line = gimp_tool_widget_add_line (widget, + private->x1, + private->y1, + private->x2, + private->y2); + + gimp_canvas_item_set_visible (private->line, SHOW_LINE); + + private->start_handle = + gimp_tool_widget_add_handle (widget, + ENDPOINT_HANDLE_TYPE, + private->x1, + private->y1, + ENDPOINT_HANDLE_SIZE, + ENDPOINT_HANDLE_SIZE, + GIMP_HANDLE_ANCHOR_CENTER); + + private->end_handle = + gimp_tool_widget_add_handle (widget, + ENDPOINT_HANDLE_TYPE, + private->x2, + private->y2, + ENDPOINT_HANDLE_SIZE, + ENDPOINT_HANDLE_SIZE, + GIMP_HANDLE_ANCHOR_CENTER); + + private->slider_group = + gimp_canvas_group_new (gimp_tool_widget_get_shell (widget)); + gimp_tool_widget_add_item (widget, private->slider_group); + g_object_unref (private->slider_group); + + private->handle_circle = + gimp_tool_widget_add_handle (widget, + GIMP_HANDLE_CIRCLE, + private->x1, + private->y1, + ENDPOINT_HANDLE_SIZE * HANDLE_CIRCLE_SCALE, + ENDPOINT_HANDLE_SIZE * HANDLE_CIRCLE_SCALE, + GIMP_HANDLE_ANCHOR_CENTER); + + gimp_tool_line_changed (widget); +} + +static void +gimp_tool_line_finalize (GObject *object) +{ + GimpToolLine *line = GIMP_TOOL_LINE (object); + GimpToolLinePrivate *private = line->private; + + g_clear_pointer (&private->sliders, g_array_unref); + g_clear_pointer (&private->status_title, g_free); + g_clear_pointer (&private->slider_handles, g_array_unref); + + G_OBJECT_CLASS (parent_class)->finalize (object); +} + +static void +gimp_tool_line_set_property (GObject *object, + guint property_id, + const GValue *value, + GParamSpec *pspec) +{ + GimpToolLine *line = GIMP_TOOL_LINE (object); + GimpToolLinePrivate *private = line->private; + + switch (property_id) + { + case PROP_X1: + private->x1 = g_value_get_double (value); + break; + case PROP_Y1: + private->y1 = g_value_get_double (value); + break; + case PROP_X2: + private->x2 = g_value_get_double (value); + break; + case PROP_Y2: + private->y2 = g_value_get_double (value); + break; + + case PROP_SLIDERS: + { + GArray *sliders = g_value_dup_boxed (value); + gboolean deselect; + + g_return_if_fail (sliders != NULL); + + deselect = + GIMP_TOOL_LINE_HANDLE_IS_SLIDER (private->selection) && + (sliders->len != private->sliders->len || + ! gimp_tool_line_get_slider (line, private->selection)->selectable); + + g_array_unref (private->sliders); + private->sliders = sliders; + + if (GIMP_TOOL_LINE_HANDLE_IS_SLIDER (private->hover)) + private->hover = GIMP_TOOL_LINE_HANDLE_NONE; + + if (deselect) + gimp_tool_line_set_selection (line, GIMP_TOOL_LINE_HANDLE_NONE); + } + break; + + case PROP_SELECTION: + { + gint selection = g_value_get_int (value); + + g_return_if_fail (selection < (gint) private->sliders->len); + g_return_if_fail (selection < 0 || + gimp_tool_line_get_slider (line, + selection)->selectable); + + if (selection != private->selection) + { + private->selection = selection; + + if (private->grab == GRAB_SELECTION) + private->grab = GRAB_NONE; + + g_signal_emit (line, line_signals[SELECTION_CHANGED], 0); + } + } + break; + + case PROP_STATUS_TITLE: + g_free (private->status_title); + private->status_title = g_value_dup_string (value); + if (! private->status_title) + private->status_title = g_strdup (_("Line: ")); + break; + + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); + break; + } +} + +static void +gimp_tool_line_get_property (GObject *object, + guint property_id, + GValue *value, + GParamSpec *pspec) +{ + GimpToolLine *line = GIMP_TOOL_LINE (object); + GimpToolLinePrivate *private = line->private; + + switch (property_id) + { + case PROP_X1: + g_value_set_double (value, private->x1); + break; + case PROP_Y1: + g_value_set_double (value, private->y1); + break; + case PROP_X2: + g_value_set_double (value, private->x2); + break; + case PROP_Y2: + g_value_set_double (value, private->y2); + break; + + case PROP_SLIDERS: + g_value_set_boxed (value, private->sliders); + break; + + case PROP_SELECTION: + g_value_set_int (value, private->selection); + break; + + case PROP_STATUS_TITLE: + g_value_set_string (value, private->status_title); + break; + + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); + break; + } +} + +static void +gimp_tool_line_changed (GimpToolWidget *widget) +{ + GimpToolLine *line = GIMP_TOOL_LINE (widget); + GimpToolLinePrivate *private = line->private; + gint i; + + gimp_canvas_line_set (private->line, + private->x1, + private->y1, + private->x2, + private->y2); + + gimp_canvas_handle_set_position (private->start_handle, + private->x1, + private->y1); + + gimp_canvas_handle_set_position (private->end_handle, + private->x2, + private->y2); + + /* remove excessive slider handles */ + for (i = private->sliders->len; i < private->slider_handles->len; i++) + { + gimp_canvas_group_remove_item (GIMP_CANVAS_GROUP (private->slider_group), + gimp_tool_line_get_handle (line, i)); + } + + g_array_set_size (private->slider_handles, private->sliders->len); + + for (i = 0; i < private->sliders->len; i++) + { + gdouble value; + gdouble x; + gdouble y; + GimpCanvasItem **handle; + + value = gimp_tool_line_get_slider (line, i)->value; + + x = private->x1 + (private->x2 - private->x1) * value; + y = private->y1 + (private->y2 - private->y1) * value; + + handle = &g_array_index (private->slider_handles, GimpCanvasItem *, i); + + if (*handle) + { + gimp_canvas_handle_set_position (*handle, x, y); + } + else + { + *handle = gimp_canvas_handle_new (gimp_tool_widget_get_shell (widget), + SLIDER_HANDLE_TYPE, + GIMP_HANDLE_ANCHOR_CENTER, + x, + y, + SLIDER_HANDLE_SIZE, + SLIDER_HANDLE_SIZE); + + gimp_canvas_group_add_item (GIMP_CANVAS_GROUP (private->slider_group), + *handle); + g_object_unref (*handle); + } + } + + gimp_tool_line_update_handles (line); + gimp_tool_line_update_circle (line); + gimp_tool_line_update_hilight (line); +} + +static void +gimp_tool_line_focus_changed (GimpToolWidget *widget) +{ + GimpToolLine *line = GIMP_TOOL_LINE (widget); + + gimp_tool_line_update_hilight (line); +} + +gboolean +gimp_tool_line_button_press (GimpToolWidget *widget, + const GimpCoords *coords, + guint32 time, + GdkModifierType state, + GimpButtonPressType press_type) +{ + GimpToolLine *line = GIMP_TOOL_LINE (widget); + GimpToolLinePrivate *private = line->private; + gboolean result = FALSE; + + private->grab = GRAB_NONE; + private->remove_slider = FALSE; + + private->saved_x1 = private->x1; + private->saved_y1 = private->y1; + private->saved_x2 = private->x2; + private->saved_y2 = private->y2; + + if (press_type != GIMP_BUTTON_PRESS_NORMAL && + private->hover > GIMP_TOOL_LINE_HANDLE_NONE && + private->selection > GIMP_TOOL_LINE_HANDLE_NONE) + { + g_signal_emit (line, line_signals[HANDLE_CLICKED], 0, + private->selection, state, press_type, &result); + + if (! result) + gimp_tool_widget_hover (widget, coords, state, TRUE); + } + + if (press_type == GIMP_BUTTON_PRESS_NORMAL || ! result) + { + private->saved_x1 = private->x1; + private->saved_y1 = private->y1; + private->saved_x2 = private->x2; + private->saved_y2 = private->y2; + + if (GIMP_TOOL_LINE_HANDLE_IS_SLIDER (private->hover)) + { + private->saved_slider_value = + gimp_tool_line_get_slider (line, private->hover)->value; + } + + if (private->hover > GIMP_TOOL_LINE_HANDLE_NONE) + { + gimp_tool_line_set_selection (line, private->hover); + + private->grab = GRAB_SELECTION; + } + else if (private->hover == HOVER_NEW_SLIDER) + { + gint slider; + + g_signal_emit (line, line_signals[ADD_SLIDER], 0, + private->new_slider_value, &slider); + + g_return_val_if_fail (slider < (gint) private->sliders->len, FALSE); + + if (slider >= 0) + { + gimp_tool_line_set_selection (line, slider); + + private->saved_slider_value = + gimp_tool_line_get_slider (line, private->selection)->value; + + private->grab = GRAB_SELECTION; + } + } + else if (state & GRAB_LINE_MASK) + { + private->grab = GRAB_LINE; + } + + result = (private->grab != GRAB_NONE); + } + + if (! result) + { + private->hover = GIMP_TOOL_LINE_HANDLE_NONE; + + gimp_tool_line_set_selection (line, GIMP_TOOL_LINE_HANDLE_NONE); + } + + gimp_tool_line_update_handles (line); + gimp_tool_line_update_circle (line); + gimp_tool_line_update_status (line, state, TRUE); + + return result; +} + +void +gimp_tool_line_button_release (GimpToolWidget *widget, + const GimpCoords *coords, + guint32 time, + GdkModifierType state, + GimpButtonReleaseType release_type) +{ + GimpToolLine *line = GIMP_TOOL_LINE (widget); + GimpToolLinePrivate *private = line->private; + GimpToolLineGrab grab = private->grab; + + private->grab = GRAB_NONE; + + if (release_type == GIMP_BUTTON_RELEASE_CANCEL) + { + if (grab != GRAB_NONE) + { + if (grab == GRAB_SELECTION && + GIMP_TOOL_LINE_HANDLE_IS_SLIDER (private->selection)) + { + gimp_tool_line_get_slider (line, private->selection)->value = + private->saved_slider_value; + + if (private->remove_slider) + { + private->remove_slider = FALSE; + + g_signal_emit (line, line_signals[PREPARE_TO_REMOVE_SLIDER], 0, + private->selection, FALSE); + } + } + + g_object_set (line, + "x1", private->saved_x1, + "y1", private->saved_y1, + "x2", private->saved_x2, + "y2", private->saved_y2, + NULL); + } + } + else if (grab == GRAB_SELECTION) + { + if (private->remove_slider) + { + private->remove_slider = FALSE; + + g_signal_emit (line, line_signals[REMOVE_SLIDER], 0, + private->selection); + } + else if (release_type == GIMP_BUTTON_RELEASE_CLICK) + { + gboolean result; + + g_signal_emit (line, line_signals[HANDLE_CLICKED], 0, + private->selection, state, GIMP_BUTTON_PRESS_NORMAL, + &result); + } + } +} + +void +gimp_tool_line_motion (GimpToolWidget *widget, + const GimpCoords *coords, + guint32 time, + GdkModifierType state) +{ + GimpToolLine *line = GIMP_TOOL_LINE (widget); + GimpToolLinePrivate *private = line->private; + gdouble diff_x = coords->x - private->mouse_x; + gdouble diff_y = coords->y - private->mouse_y; + + private->mouse_x = coords->x; + private->mouse_y = coords->y; + + if (private->grab == GRAB_LINE) + { + g_object_set (line, + "x1", private->x1 + diff_x, + "y1", private->y1 + diff_y, + "x2", private->x2 + diff_x, + "y2", private->y2 + diff_y, + NULL); + } + else + { + gboolean constrain = (state & gimp_get_constrain_behavior_mask ()) != 0; + + gimp_tool_line_selection_motion (line, constrain); + } + + gimp_tool_line_update_status (line, state, TRUE); +} + +GimpHit +gimp_tool_line_hit (GimpToolWidget *widget, + const GimpCoords *coords, + GdkModifierType state, + gboolean proximity) +{ + GimpToolLine *line = GIMP_TOOL_LINE (widget); + + if (! (state & GRAB_LINE_MASK)) + { + gint hover = gimp_tool_line_get_hover (line, coords, state); + + if (hover != GIMP_TOOL_LINE_HANDLE_NONE) + return GIMP_HIT_DIRECT; + } + else + { + return GIMP_HIT_INDIRECT; + } + + return GIMP_HIT_NONE; +} + +void +gimp_tool_line_hover (GimpToolWidget *widget, + const GimpCoords *coords, + GdkModifierType state, + gboolean proximity) +{ + GimpToolLine *line = GIMP_TOOL_LINE (widget); + GimpToolLinePrivate *private = line->private; + + private->mouse_x = coords->x; + private->mouse_y = coords->y; + + if (! (state & GRAB_LINE_MASK)) + private->hover = gimp_tool_line_get_hover (line, coords, state); + else + private->hover = GIMP_TOOL_LINE_HANDLE_NONE; + + gimp_tool_line_update_handles (line); + gimp_tool_line_update_circle (line); + gimp_tool_line_update_status (line, state, proximity); +} + +static void +gimp_tool_line_leave_notify (GimpToolWidget *widget) +{ + GimpToolLine *line = GIMP_TOOL_LINE (widget); + GimpToolLinePrivate *private = line->private; + + private->hover = GIMP_TOOL_LINE_HANDLE_NONE; + + gimp_tool_line_update_handles (line); + gimp_tool_line_update_circle (line); + + GIMP_TOOL_WIDGET_CLASS (parent_class)->leave_notify (widget); +} + +static gboolean +gimp_tool_line_key_press (GimpToolWidget *widget, + GdkEventKey *kevent) +{ + GimpToolLine *line = GIMP_TOOL_LINE (widget); + GimpToolLinePrivate *private = line->private; + GimpDisplayShell *shell; + gdouble pixels = 1.0; + gboolean move_line; + + move_line = kevent->state & GRAB_LINE_MASK; + + if (private->selection == GIMP_TOOL_LINE_HANDLE_NONE && ! move_line) + return GIMP_TOOL_WIDGET_CLASS (parent_class)->key_press (widget, kevent); + + shell = gimp_tool_widget_get_shell (widget); + + if (kevent->state & gimp_get_extend_selection_mask ()) + pixels = 10.0; + + if (kevent->state & gimp_get_toggle_behavior_mask ()) + pixels = 50.0; + + switch (kevent->keyval) + { + case GDK_KEY_Left: + case GDK_KEY_Right: + case GDK_KEY_Up: + case GDK_KEY_Down: + /* move an endpoint (or both endpoints) */ + if (private->selection < 0 || move_line) + { + gdouble xdist, ydist; + gdouble dx, dy; + + xdist = FUNSCALEX (shell, pixels); + ydist = FUNSCALEY (shell, pixels); + + dx = 0.0; + dy = 0.0; + + switch (kevent->keyval) + { + case GDK_KEY_Left: dx = -xdist; break; + case GDK_KEY_Right: dx = +xdist; break; + case GDK_KEY_Up: dy = -ydist; break; + case GDK_KEY_Down: dy = +ydist; break; + } + + if (private->selection == GIMP_TOOL_LINE_HANDLE_START || move_line) + { + g_object_set (line, + "x1", private->x1 + dx, + "y1", private->y1 + dy, + NULL); + } + + if (private->selection == GIMP_TOOL_LINE_HANDLE_END || move_line) + { + g_object_set (line, + "x2", private->x2 + dx, + "y2", private->y2 + dy, + NULL); + } + } + /* move a slider */ + else + { + GimpControllerSlider *slider; + gdouble dist; + gdouble dvalue; + + slider = gimp_tool_line_get_slider (line, private->selection); + + if (! slider->movable) + break; + + dist = gimp_canvas_item_transform_distance (private->line, + private->x1, private->y1, + private->x2, private->y2); + + if (dist > 0.0) + dist = pixels / dist; + + dvalue = 0.0; + + switch (kevent->keyval) + { + case GDK_KEY_Left: + if (private->x1 < private->x2) dvalue = -dist; + else if (private->x1 > private->x2) dvalue = +dist; + break; + + case GDK_KEY_Right: + if (private->x1 < private->x2) dvalue = +dist; + else if (private->x1 > private->x2) dvalue = -dist; + break; + + case GDK_KEY_Up: + if (private->y1 < private->y2) dvalue = -dist; + else if (private->y1 > private->y2) dvalue = +dist; + break; + + case GDK_KEY_Down: + if (private->y1 < private->y2) dvalue = +dist; + else if (private->y1 > private->y2) dvalue = -dist; + break; + } + + if (dvalue != 0.0) + { + slider->value += dvalue; + slider->value = CLAMP (slider->value, slider->min, slider->max); + slider->value = CLAMP (slider->value, 0.0, 1.0); + + g_object_set (line, + "sliders", private->sliders, + NULL); + } + } + return TRUE; + + case GDK_KEY_BackSpace: + case GDK_KEY_Delete: + if (GIMP_TOOL_LINE_HANDLE_IS_SLIDER (private->selection)) + { + if (gimp_tool_line_get_slider (line, private->selection)->removable) + { + g_signal_emit (line, line_signals[REMOVE_SLIDER], 0, + private->selection); + } + } + return TRUE; + } + + return GIMP_TOOL_WIDGET_CLASS (parent_class)->key_press (widget, kevent); +} + +static void +gimp_tool_line_motion_modifier (GimpToolWidget *widget, + GdkModifierType key, + gboolean press, + GdkModifierType state) +{ + GimpToolLine *line = GIMP_TOOL_LINE (widget); + + if (key == gimp_get_constrain_behavior_mask ()) + { + gimp_tool_line_selection_motion (line, press); + + gimp_tool_line_update_status (line, state, TRUE); + } +} + +static gboolean +gimp_tool_line_get_cursor (GimpToolWidget *widget, + const GimpCoords *coords, + GdkModifierType state, + GimpCursorType *cursor, + GimpToolCursorType *tool_cursor, + GimpCursorModifier *modifier) +{ + GimpToolLine *line = GIMP_TOOL_LINE (widget); + GimpToolLinePrivate *private = line->private; + + if (private->grab ==GRAB_LINE || (state & GRAB_LINE_MASK)) + { + *modifier = GIMP_CURSOR_MODIFIER_MOVE; + + return TRUE; + } + else if (private->grab == GRAB_SELECTION || + private->hover > GIMP_TOOL_LINE_HANDLE_NONE) + { + const GimpControllerSlider *slider = NULL; + + if (private->grab == GRAB_SELECTION) + { + if (GIMP_TOOL_LINE_HANDLE_IS_SLIDER (private->selection)) + slider = gimp_tool_line_get_slider (line, private->selection); + } + else if (GIMP_TOOL_LINE_HANDLE_IS_SLIDER (private->hover)) + { + slider = gimp_tool_line_get_slider (line, private->hover); + } + + if (private->grab == GRAB_SELECTION && slider && private->remove_slider) + { + *modifier = GIMP_CURSOR_MODIFIER_MINUS; + + return TRUE; + } + else if (! slider || slider->movable) + { + *modifier = GIMP_CURSOR_MODIFIER_MOVE; + + return TRUE; + } + } + else if (private->hover == HOVER_NEW_SLIDER) + { + *modifier = GIMP_CURSOR_MODIFIER_PLUS; + + return TRUE; + } + + return FALSE; +} + +static gint +gimp_tool_line_get_hover (GimpToolLine *line, + const GimpCoords *coords, + GdkModifierType state) +{ + GimpToolLinePrivate *private = line->private; + gint hover = GIMP_TOOL_LINE_HANDLE_NONE; + gdouble min_dist; + gint first_handle; + gint i; + + /* find the closest handle to the cursor */ + min_dist = G_MAXDOUBLE; + first_handle = private->sliders->len - 1; + + /* skip the sliders if the two endpoints are the same, in particular so + * that if the line is created during a button-press event (as in the + * blend tool), the end endpoint is dragged, instead of a slider. + */ + if (private->x1 == private->x2 && private->y1 == private->y2) + first_handle = -1; + + for (i = first_handle; i > GIMP_TOOL_LINE_HANDLE_NONE; i--) + { + GimpCanvasItem *handle; + + if (GIMP_TOOL_LINE_HANDLE_IS_SLIDER (i)) + { + const GimpControllerSlider *slider; + + slider = gimp_tool_line_get_slider (line, i); + + if (! slider->visible || ! slider->selectable) + continue; + } + + handle = gimp_tool_line_get_handle (line, i); + + if (gimp_tool_line_handle_hit (handle, + private->mouse_x, + private->mouse_y, + &min_dist)) + { + hover = i; + } + } + + if (hover == GIMP_TOOL_LINE_HANDLE_NONE) + { + gboolean constrain; + gdouble value; + gdouble dist; + + constrain = (state & gimp_get_constrain_behavior_mask ()) != 0; + + value = gimp_tool_line_project_point (line, + private->mouse_x, + private->mouse_y, + constrain, + &dist); + + if (value >= 0.0 && value <= 1.0 && dist <= LINE_VICINITY) + { + gboolean can_add; + + g_signal_emit (line, line_signals[CAN_ADD_SLIDER], 0, + value, &can_add); + + if (can_add) + { + hover = HOVER_NEW_SLIDER; + private->new_slider_value = value; + } + } + } + + return hover; +} + +static GimpControllerSlider * +gimp_tool_line_get_slider (GimpToolLine *line, + gint slider) +{ + GimpToolLinePrivate *private = line->private; + + gimp_assert (slider >= 0 && slider < private->sliders->len); + + return &g_array_index (private->sliders, GimpControllerSlider, slider); +} + +static GimpCanvasItem * +gimp_tool_line_get_handle (GimpToolLine *line, + gint handle) +{ + GimpToolLinePrivate *private = line->private; + + switch (handle) + { + case GIMP_TOOL_LINE_HANDLE_NONE: + return NULL; + + case GIMP_TOOL_LINE_HANDLE_START: + return private->start_handle; + + case GIMP_TOOL_LINE_HANDLE_END: + return private->end_handle; + + default: + gimp_assert (handle >= 0 && + handle < (gint) private->slider_handles->len); + + return g_array_index (private->slider_handles, + GimpCanvasItem *, handle); + } +} + +static gdouble +gimp_tool_line_project_point (GimpToolLine *line, + gdouble x, + gdouble y, + gboolean constrain, + gdouble *dist) +{ + GimpToolLinePrivate *private = line->private; + gdouble length_sqr; + gdouble value = 0.0; + + length_sqr = SQR (private->x2 - private->x1) + + SQR (private->y2 - private->y1); + + /* don't calculate the projection for 0-length lines, since we'll just get + * NaN. + */ + if (length_sqr > 0.0) + { + value = (private->x2 - private->x1) * (x - private->x1) + + (private->y2 - private->y1) * (y - private->y1); + value /= length_sqr; + + if (dist) + { + gdouble px; + gdouble py; + + px = private->x1 + (private->x2 - private->x1) * value; + py = private->y1 + (private->y2 - private->y1) * value; + + *dist = gimp_canvas_item_transform_distance (private->line, + x, y, + px, py); + } + + if (constrain) + value = RINT (12.0 * value) / 12.0; + } + else + { + if (dist) + { + *dist = gimp_canvas_item_transform_distance (private->line, + x, y, + private->x1, private->y1); + } + } + + return value; +} + +static gboolean +gimp_tool_line_selection_motion (GimpToolLine *line, + gboolean constrain) +{ + GimpToolLinePrivate *private = line->private; + gdouble x = private->mouse_x; + gdouble y = private->mouse_y; + + if (private->grab != GRAB_SELECTION) + return FALSE; + + switch (private->selection) + { + case GIMP_TOOL_LINE_HANDLE_NONE: + gimp_assert_not_reached (); + + case GIMP_TOOL_LINE_HANDLE_START: + if (constrain) + { + gimp_display_shell_constrain_line ( + gimp_tool_widget_get_shell (GIMP_TOOL_WIDGET (line)), + private->x2, private->y2, + &x, &y, + GIMP_CONSTRAIN_LINE_15_DEGREES); + } + + g_object_set (line, + "x1", x, + "y1", y, + NULL); + return TRUE; + + case GIMP_TOOL_LINE_HANDLE_END: + if (constrain) + { + gimp_display_shell_constrain_line ( + gimp_tool_widget_get_shell (GIMP_TOOL_WIDGET (line)), + private->x1, private->y1, + &x, &y, + GIMP_CONSTRAIN_LINE_15_DEGREES); + } + + g_object_set (line, + "x2", x, + "y2", y, + NULL); + return TRUE; + + default: + { + GimpDisplayShell *shell; + GimpControllerSlider *slider; + gdouble value; + gdouble dist; + gboolean remove_slider; + + shell = gimp_tool_widget_get_shell (GIMP_TOOL_WIDGET (line)); + + slider = gimp_tool_line_get_slider (line, private->selection); + + /* project the cursor position onto the line */ + value = gimp_tool_line_project_point (line, x, y, constrain, &dist); + + /* slider dragging */ + if (slider->movable) + { + value = CLAMP (value, slider->min, slider->max); + value = CLAMP (value, 0.0, 1.0); + + value = fabs (value); /* avoid negative zero */ + + slider->value = value; + + g_object_set (line, + "sliders", private->sliders, + NULL); + } + + /* slider tearing */ + remove_slider = slider->removable && dist > SLIDER_TEAR_DISTANCE; + + if (remove_slider != private->remove_slider) + { + private->remove_slider = remove_slider; + + g_signal_emit (line, line_signals[PREPARE_TO_REMOVE_SLIDER], 0, + private->selection, remove_slider); + + /* set the cursor modifier to a minus by talking to the shell + * directly -- eek! + */ + { + GimpCursorType cursor; + GimpToolCursorType tool_cursor; + GimpCursorModifier modifier; + + cursor = shell->current_cursor; + tool_cursor = shell->tool_cursor; + modifier = GIMP_CURSOR_MODIFIER_NONE; + + gimp_tool_line_get_cursor (GIMP_TOOL_WIDGET (line), NULL, 0, + &cursor, &tool_cursor, &modifier); + + gimp_display_shell_set_cursor (shell, cursor, tool_cursor, modifier); + } + + gimp_tool_line_update_handles (line); + gimp_tool_line_update_circle (line); + gimp_tool_line_update_status (line, + constrain ? + gimp_get_constrain_behavior_mask () : + 0, + TRUE); + } + + return TRUE; + } + } +} + +static void +gimp_tool_line_update_handles (GimpToolLine *line) +{ + GimpToolLinePrivate *private = line->private; + gdouble value; + gdouble dist; + gint i; + + value = gimp_tool_line_project_point (line, + private->mouse_x, + private->mouse_y, + FALSE, + &dist); + + for (i = 0; i < private->sliders->len; i++) + { + const GimpControllerSlider *slider; + GimpCanvasItem *handle; + gint size; + gint hit_radius; + gboolean show_autohidden; + gboolean visible; + + slider = gimp_tool_line_get_slider (line, i); + handle = gimp_tool_line_get_handle (line, i); + + size = slider->size * SLIDER_HANDLE_SIZE; + size = MAX (size, 1); + + hit_radius = (MAX (size, SLIDER_HANDLE_SIZE) * HANDLE_CIRCLE_SCALE) / 2; + + /* show a autohidden slider if it's selected, or if no other handle is + * grabbed or hovered-over, and the cursor is close enough to the line, + * between the slider's min and max values. + */ + show_autohidden = private->selection == i || + (private->grab == GRAB_NONE && + (private->hover <= GIMP_TOOL_LINE_HANDLE_NONE || + private->hover == i) && + dist <= hit_radius && + value >= slider->min && + value <= slider->max); + + visible = slider->visible && + (! slider->autohide || show_autohidden) && + ! (private->selection == i && private->remove_slider); + + handle = gimp_tool_line_get_handle (line, i); + + if (visible) + { + g_object_set (handle, + "type", slider->type, + "width", size, + "height", size, + NULL); + } + + gimp_canvas_item_set_visible (handle, visible); + } +} + +static void +gimp_tool_line_update_circle (GimpToolLine *line) +{ + GimpToolLinePrivate *private = line->private; + gboolean visible; + + visible = (private->grab == GRAB_NONE && + private->hover != GIMP_TOOL_LINE_HANDLE_NONE) || + (private->grab == GRAB_SELECTION && + private->remove_slider); + + if (visible) + { + gdouble x; + gdouble y; + gint width; + gint height; + gboolean dashed; + + if (private->grab == GRAB_NONE && private->hover == HOVER_NEW_SLIDER) + { + /* new slider */ + x = private->x1 + + (private->x2 - private->x1) * private->new_slider_value; + y = private->y1 + + (private->y2 - private->y1) * private->new_slider_value; + + width = height = SLIDER_HANDLE_SIZE; + + dashed = TRUE; + } + else + { + GimpCanvasItem *handle; + + if (private->grab == GRAB_SELECTION) + { + /* tear slider */ + handle = gimp_tool_line_get_handle (line, private->selection); + dashed = TRUE; + } + else + { + /* hover over handle */ + handle = gimp_tool_line_get_handle (line, private->hover); + dashed = FALSE; + } + + gimp_canvas_handle_get_position (handle, &x, &y); + gimp_canvas_handle_get_size (handle, &width, &height); + } + + width = MAX (width, SLIDER_HANDLE_SIZE); + height = MAX (height, SLIDER_HANDLE_SIZE); + + width *= HANDLE_CIRCLE_SCALE; + height *= HANDLE_CIRCLE_SCALE; + + gimp_canvas_handle_set_position (private->handle_circle, x, y); + gimp_canvas_handle_set_size (private->handle_circle, width, height); + + g_object_set (private->handle_circle, + "type", dashed ? GIMP_HANDLE_DASHED_CIRCLE : + GIMP_HANDLE_CIRCLE, + NULL); + } + + gimp_canvas_item_set_visible (private->handle_circle, visible); +} + +static void +gimp_tool_line_update_hilight (GimpToolLine *line) +{ + GimpToolLinePrivate *private = line->private; + gboolean focus; + gint i; + + focus = gimp_tool_widget_get_focus (GIMP_TOOL_WIDGET (line)); + + for (i = GIMP_TOOL_LINE_HANDLE_NONE + 1; + i < (gint) private->sliders->len; + i++) + { + GimpCanvasItem *handle; + + handle = gimp_tool_line_get_handle (line, i); + + gimp_canvas_item_set_highlight (handle, focus && i == private->selection); + } +} + +static void +gimp_tool_line_update_status (GimpToolLine *line, + GdkModifierType state, + gboolean proximity) +{ + GimpToolLinePrivate *private = line->private; + + if (proximity) + { + GimpDisplayShell *shell; + const gchar *toggle_behavior_format = NULL; + const gchar *message = NULL; + gchar *line_status = NULL; + gchar *status; + gint handle; + + shell = gimp_tool_widget_get_shell (GIMP_TOOL_WIDGET (line)); + + if (private->grab == GRAB_SELECTION) + handle = private->selection; + else + handle = private->hover; + + if (handle == GIMP_TOOL_LINE_HANDLE_START || + handle == GIMP_TOOL_LINE_HANDLE_END) + { + line_status = gimp_display_shell_get_line_status (shell, + _("Click-Drag to move the endpoint"), + ". ", + private->x1, + private->y1, + private->x2, + private->y2); + toggle_behavior_format = _("%s for constrained angles"); + } + else if (GIMP_TOOL_LINE_HANDLE_IS_SLIDER (handle) || + handle == HOVER_NEW_SLIDER) + { + if (private->grab == GRAB_SELECTION && private->remove_slider) + { + message = _("Release to remove the slider"); + } + else + { + toggle_behavior_format = _("%s for constrained values"); + + if (GIMP_TOOL_LINE_HANDLE_IS_SLIDER (handle)) + { + if (gimp_tool_line_get_slider (line, handle)->movable) + { + if (gimp_tool_line_get_slider (line, handle)->removable) + { + if (private->grab == GRAB_SELECTION) + { + message = _("Click-Drag to move the slider; " + "drag away to remove the slider"); + } + else + { + message = _("Click-Drag to move or remove the slider"); + } + } + else + { + message = _("Click-Drag to move the slider"); + } + } + else + { + toggle_behavior_format = NULL; + + if (gimp_tool_line_get_slider (line, handle)->removable) + { + if (private->grab == GRAB_SELECTION) + { + message = _("Click-Drag away to remove the slider"); + } + else + { + message = _("Click-Drag to remove the slider"); + } + } + else + { + message = NULL; + } + } + } + else + { + message = _("Click or Click-Drag to add a new slider"); + } + } + } + else if (state & GDK_MOD1_MASK) + { + message = _("Click-Drag to move the line"); + } + + status = + gimp_suggest_modifiers (message ? message : (line_status ? line_status : ""), + ((toggle_behavior_format ? + gimp_get_constrain_behavior_mask () : 0) | + (private->grab == GRAB_NONE ? + GDK_MOD1_MASK : 0)) & + ~state, + NULL, + toggle_behavior_format, + _("%s to move the whole line")); + + if (message || line_status) + { + gimp_tool_widget_set_status (GIMP_TOOL_WIDGET (line), status); + } + else + { + line_status = gimp_display_shell_get_line_status (shell, + private->status_title, + ". ", + private->x1, + private->y1, + private->x2, + private->y2); + gimp_tool_widget_set_status_coords (GIMP_TOOL_WIDGET (line), + line_status, + private->x2 - private->x1, + ", ", + private->y2 - private->y1, + status); + } + + g_free (status); + if (line_status) + g_free (line_status); + } + else + { + gimp_tool_widget_set_status (GIMP_TOOL_WIDGET (line), NULL); + } +} + +static gboolean +gimp_tool_line_handle_hit (GimpCanvasItem *handle, + gdouble x, + gdouble y, + gdouble *min_dist) +{ + gdouble handle_x; + gdouble handle_y; + gint handle_width; + gint handle_height; + gint radius; + gdouble dist; + + gimp_canvas_handle_get_position (handle, &handle_x, &handle_y); + gimp_canvas_handle_get_size (handle, &handle_width, &handle_height); + + handle_width = MAX (handle_width, SLIDER_HANDLE_SIZE); + handle_height = MAX (handle_height, SLIDER_HANDLE_SIZE); + + radius = ((gint) (handle_width * HANDLE_CIRCLE_SCALE)) / 2; + radius = MAX (radius, LINE_VICINITY); + + dist = gimp_canvas_item_transform_distance (handle, + x, y, handle_x, handle_y); + + if (dist <= radius && dist < *min_dist) + { + *min_dist = dist; + + return TRUE; + } + else + { + return FALSE; + } +} + + +/* public functions */ + +GimpToolWidget * +gimp_tool_line_new (GimpDisplayShell *shell, + gdouble x1, + gdouble y1, + gdouble x2, + gdouble y2) +{ + g_return_val_if_fail (GIMP_IS_DISPLAY_SHELL (shell), NULL); + + return g_object_new (GIMP_TYPE_TOOL_LINE, + "shell", shell, + "x1", x1, + "y1", y1, + "x2", x2, + "y2", y2, + NULL); +} + +void +gimp_tool_line_set_sliders (GimpToolLine *line, + const GimpControllerSlider *sliders, + gint n_sliders) +{ + GimpToolLinePrivate *private; + + g_return_if_fail (GIMP_IS_TOOL_LINE (line)); + g_return_if_fail (n_sliders == 0 || (n_sliders > 0 && sliders != NULL)); + + private = line->private; + + if (GIMP_TOOL_LINE_HANDLE_IS_SLIDER (private->selection) && + private->sliders->len != n_sliders) + { + gimp_tool_line_set_selection (line, GIMP_TOOL_LINE_HANDLE_NONE); + } + + g_array_set_size (private->sliders, n_sliders); + + memcpy (private->sliders->data, sliders, + n_sliders * sizeof (GimpControllerSlider)); + + g_object_set (line, + "sliders", private->sliders, + NULL); +} + +const GimpControllerSlider * +gimp_tool_line_get_sliders (GimpToolLine *line, + gint *n_sliders) +{ + GimpToolLinePrivate *private; + + g_return_val_if_fail (GIMP_IS_TOOL_LINE (line), NULL); + + private = line->private; + + if (n_sliders) *n_sliders = private->sliders->len; + + return (const GimpControllerSlider *) private->sliders->data; +} + +void +gimp_tool_line_set_selection (GimpToolLine *line, + gint handle) +{ + GimpToolLinePrivate *private; + + g_return_if_fail (GIMP_IS_TOOL_LINE (line)); + + private = line->private; + + g_return_if_fail (handle >= GIMP_TOOL_LINE_HANDLE_NONE && + handle < (gint) private->sliders->len); + + g_object_set (line, + "selection", handle, + NULL); +} + +gint +gimp_tool_line_get_selection (GimpToolLine *line) +{ + GimpToolLinePrivate *private; + + g_return_val_if_fail (GIMP_IS_TOOL_LINE (line), GIMP_TOOL_LINE_HANDLE_NONE); + + private = line->private; + + return private->selection; +} |