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-rw-r--r--app/display/gimptoolline.c1796
1 files changed, 1796 insertions, 0 deletions
diff --git a/app/display/gimptoolline.c b/app/display/gimptoolline.c
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+++ b/app/display/gimptoolline.c
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+/* 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;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-22 13:46:37 +0000