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-rw-r--r--app/tools/gimpdrawtool.c1281
1 files changed, 1281 insertions, 0 deletions
diff --git a/app/tools/gimpdrawtool.c b/app/tools/gimpdrawtool.c
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+++ b/app/tools/gimpdrawtool.c
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+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995-2001 Spencer Kimball, Peter Mattis, and others
+ *
+ * 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 <string.h>
+
+#include <gegl.h>
+#include <gtk/gtk.h>
+
+#include "libgimpmath/gimpmath.h"
+
+#include "tools-types.h"
+
+#include "core/gimpimage.h"
+#include "core/gimppickable.h"
+
+#include "display/gimpcanvas.h"
+#include "display/gimpcanvasarc.h"
+#include "display/gimpcanvasboundary.h"
+#include "display/gimpcanvasgroup.h"
+#include "display/gimpcanvasguide.h"
+#include "display/gimpcanvashandle.h"
+#include "display/gimpcanvasitem-utils.h"
+#include "display/gimpcanvasline.h"
+#include "display/gimpcanvaspen.h"
+#include "display/gimpcanvaspolygon.h"
+#include "display/gimpcanvasrectangle.h"
+#include "display/gimpcanvassamplepoint.h"
+#include "display/gimpcanvastextcursor.h"
+#include "display/gimpcanvastransformpreview.h"
+#include "display/gimpdisplay.h"
+#include "display/gimpdisplayshell.h"
+#include "display/gimpdisplayshell-items.h"
+#include "display/gimpdisplayshell-transform.h"
+#include "display/gimptoolwidget.h"
+
+#include "gimpdrawtool.h"
+#include "gimptoolcontrol.h"
+
+
+#define USE_TIMEOUT
+#define DRAW_FPS 120
+#define DRAW_TIMEOUT (1000 /* milliseconds */ / (2 * DRAW_FPS))
+#define MINIMUM_DRAW_INTERVAL (G_TIME_SPAN_SECOND / DRAW_FPS)
+
+
+static void gimp_draw_tool_dispose (GObject *object);
+
+static gboolean gimp_draw_tool_has_display (GimpTool *tool,
+ GimpDisplay *display);
+static GimpDisplay * gimp_draw_tool_has_image (GimpTool *tool,
+ GimpImage *image);
+static void gimp_draw_tool_control (GimpTool *tool,
+ GimpToolAction action,
+ GimpDisplay *display);
+static gboolean gimp_draw_tool_key_press (GimpTool *tool,
+ GdkEventKey *kevent,
+ GimpDisplay *display);
+static gboolean gimp_draw_tool_key_release (GimpTool *tool,
+ GdkEventKey *kevent,
+ GimpDisplay *display);
+static void gimp_draw_tool_modifier_key (GimpTool *tool,
+ GdkModifierType key,
+ gboolean press,
+ GdkModifierType state,
+ GimpDisplay *display);
+static void gimp_draw_tool_active_modifier_key
+ (GimpTool *tool,
+ GdkModifierType key,
+ gboolean press,
+ GdkModifierType state,
+ GimpDisplay *display);
+static void gimp_draw_tool_oper_update (GimpTool *tool,
+ const GimpCoords *coords,
+ GdkModifierType state,
+ gboolean proximity,
+ GimpDisplay *display);
+static void gimp_draw_tool_cursor_update (GimpTool *tool,
+ const GimpCoords *coords,
+ GdkModifierType state,
+ GimpDisplay *display);
+
+static void gimp_draw_tool_widget_status (GimpToolWidget *widget,
+ const gchar *status,
+ GimpTool *tool);
+static void gimp_draw_tool_widget_status_coords
+ (GimpToolWidget *widget,
+ const gchar *title,
+ gdouble x,
+ const gchar *separator,
+ gdouble y,
+ const gchar *help,
+ GimpTool *tool);
+static void gimp_draw_tool_widget_message
+ (GimpToolWidget *widget,
+ const gchar *message,
+ GimpTool *tool);
+static void gimp_draw_tool_widget_snap_offsets
+ (GimpToolWidget *widget,
+ gint offset_x,
+ gint offset_y,
+ gint width,
+ gint height,
+ GimpTool *tool);
+
+static void gimp_draw_tool_draw (GimpDrawTool *draw_tool);
+static void gimp_draw_tool_undraw (GimpDrawTool *draw_tool);
+static void gimp_draw_tool_real_draw (GimpDrawTool *draw_tool);
+
+
+G_DEFINE_TYPE (GimpDrawTool, gimp_draw_tool, GIMP_TYPE_TOOL)
+
+#define parent_class gimp_draw_tool_parent_class
+
+
+static void
+gimp_draw_tool_class_init (GimpDrawToolClass *klass)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+ GimpToolClass *tool_class = GIMP_TOOL_CLASS (klass);
+
+ object_class->dispose = gimp_draw_tool_dispose;
+
+ tool_class->has_display = gimp_draw_tool_has_display;
+ tool_class->has_image = gimp_draw_tool_has_image;
+ tool_class->control = gimp_draw_tool_control;
+ tool_class->key_press = gimp_draw_tool_key_press;
+ tool_class->key_release = gimp_draw_tool_key_release;
+ tool_class->modifier_key = gimp_draw_tool_modifier_key;
+ tool_class->active_modifier_key = gimp_draw_tool_active_modifier_key;
+ tool_class->oper_update = gimp_draw_tool_oper_update;
+ tool_class->cursor_update = gimp_draw_tool_cursor_update;
+
+ klass->draw = gimp_draw_tool_real_draw;
+}
+
+static void
+gimp_draw_tool_init (GimpDrawTool *draw_tool)
+{
+ draw_tool->display = NULL;
+ draw_tool->paused_count = 0;
+ draw_tool->preview = NULL;
+ draw_tool->item = NULL;
+}
+
+static void
+gimp_draw_tool_dispose (GObject *object)
+{
+ GimpDrawTool *draw_tool = GIMP_DRAW_TOOL (object);
+
+ if (draw_tool->draw_timeout)
+ {
+ g_source_remove (draw_tool->draw_timeout);
+ draw_tool->draw_timeout = 0;
+ }
+
+ gimp_draw_tool_set_widget (draw_tool, NULL);
+ gimp_draw_tool_set_default_status (draw_tool, NULL);
+
+ G_OBJECT_CLASS (parent_class)->dispose (object);
+}
+
+static gboolean
+gimp_draw_tool_has_display (GimpTool *tool,
+ GimpDisplay *display)
+{
+ GimpDrawTool *draw_tool = GIMP_DRAW_TOOL (tool);
+
+ return (display == draw_tool->display ||
+ GIMP_TOOL_CLASS (parent_class)->has_display (tool, display));
+}
+
+static GimpDisplay *
+gimp_draw_tool_has_image (GimpTool *tool,
+ GimpImage *image)
+{
+ GimpDrawTool *draw_tool = GIMP_DRAW_TOOL (tool);
+ GimpDisplay *display;
+
+ display = GIMP_TOOL_CLASS (parent_class)->has_image (tool, image);
+
+ if (! display && draw_tool->display)
+ {
+ if (image && gimp_display_get_image (draw_tool->display) == image)
+ display = draw_tool->display;
+
+ /* NULL image means any display */
+ if (! image)
+ display = draw_tool->display;
+ }
+
+ return display;
+}
+
+static void
+gimp_draw_tool_control (GimpTool *tool,
+ GimpToolAction action,
+ GimpDisplay *display)
+{
+ GimpDrawTool *draw_tool = GIMP_DRAW_TOOL (tool);
+
+ switch (action)
+ {
+ case GIMP_TOOL_ACTION_PAUSE:
+ case GIMP_TOOL_ACTION_RESUME:
+ break;
+
+ case GIMP_TOOL_ACTION_HALT:
+ if (gimp_draw_tool_is_active (draw_tool))
+ gimp_draw_tool_stop (draw_tool);
+ gimp_draw_tool_set_widget (draw_tool, NULL);
+ break;
+
+ case GIMP_TOOL_ACTION_COMMIT:
+ break;
+ }
+
+ GIMP_TOOL_CLASS (parent_class)->control (tool, action, display);
+}
+
+static gboolean
+gimp_draw_tool_key_press (GimpTool *tool,
+ GdkEventKey *kevent,
+ GimpDisplay *display)
+{
+ GimpDrawTool *draw_tool = GIMP_DRAW_TOOL (tool);
+
+ if (draw_tool->widget && display == draw_tool->display)
+ {
+ return gimp_tool_widget_key_press (draw_tool->widget, kevent);
+ }
+
+ return GIMP_TOOL_CLASS (parent_class)->key_press (tool, kevent, display);
+}
+
+static gboolean
+gimp_draw_tool_key_release (GimpTool *tool,
+ GdkEventKey *kevent,
+ GimpDisplay *display)
+{
+ GimpDrawTool *draw_tool = GIMP_DRAW_TOOL (tool);
+
+ if (draw_tool->widget && display == draw_tool->display)
+ {
+ return gimp_tool_widget_key_release (draw_tool->widget, kevent);
+ }
+
+ return GIMP_TOOL_CLASS (parent_class)->key_release (tool, kevent, display);
+}
+
+static void
+gimp_draw_tool_modifier_key (GimpTool *tool,
+ GdkModifierType key,
+ gboolean press,
+ GdkModifierType state,
+ GimpDisplay *display)
+{
+ GimpDrawTool *draw_tool = GIMP_DRAW_TOOL (tool);
+
+ if (draw_tool->widget && display == draw_tool->display)
+ {
+ gimp_tool_widget_hover_modifier (draw_tool->widget, key, press, state);
+ }
+
+ GIMP_TOOL_CLASS (parent_class)->modifier_key (tool, key, press, state,
+ display);
+}
+
+static void
+gimp_draw_tool_active_modifier_key (GimpTool *tool,
+ GdkModifierType key,
+ gboolean press,
+ GdkModifierType state,
+ GimpDisplay *display)
+{
+ GimpDrawTool *draw_tool = GIMP_DRAW_TOOL (tool);
+
+ if (draw_tool->widget && display == draw_tool->display)
+ {
+ gimp_tool_widget_motion_modifier (draw_tool->widget, key, press, state);
+ }
+
+ GIMP_TOOL_CLASS (parent_class)->active_modifier_key (tool, key, press, state,
+ display);
+}
+
+static void
+gimp_draw_tool_oper_update (GimpTool *tool,
+ const GimpCoords *coords,
+ GdkModifierType state,
+ gboolean proximity,
+ GimpDisplay *display)
+{
+ GimpDrawTool *draw_tool = GIMP_DRAW_TOOL (tool);
+
+ if (draw_tool->widget && display == draw_tool->display)
+ {
+ gimp_tool_widget_hover (draw_tool->widget, coords, state, proximity);
+ }
+ else if (proximity && draw_tool->default_status)
+ {
+ gimp_tool_replace_status (tool, display, "%s", draw_tool->default_status);
+ }
+ else if (! proximity)
+ {
+ gimp_tool_pop_status (tool, display);
+ }
+ else
+ {
+ GIMP_TOOL_CLASS (parent_class)->oper_update (tool, coords, state,
+ proximity, display);
+ }
+}
+
+static void
+gimp_draw_tool_cursor_update (GimpTool *tool,
+ const GimpCoords *coords,
+ GdkModifierType state,
+ GimpDisplay *display)
+{
+ GimpDrawTool *draw_tool = GIMP_DRAW_TOOL (tool);
+
+ if (draw_tool->widget && display == draw_tool->display)
+ {
+ GimpCursorType cursor;
+ GimpToolCursorType tool_cursor;
+ GimpCursorModifier modifier;
+
+ cursor = gimp_tool_control_get_cursor (tool->control);
+ tool_cursor = gimp_tool_control_get_tool_cursor (tool->control);
+ modifier = gimp_tool_control_get_cursor_modifier (tool->control);
+
+ if (gimp_tool_widget_get_cursor (draw_tool->widget, coords, state,
+ &cursor, &tool_cursor, &modifier))
+ {
+ gimp_tool_set_cursor (tool, display,
+ cursor, tool_cursor, modifier);
+ return;
+ }
+ }
+
+ GIMP_TOOL_CLASS (parent_class)->cursor_update (tool, coords, state,
+ display);
+}
+
+static void
+gimp_draw_tool_widget_status (GimpToolWidget *widget,
+ const gchar *status,
+ GimpTool *tool)
+{
+ GimpDrawTool *draw_tool = GIMP_DRAW_TOOL (tool);
+
+ if (gimp_draw_tool_is_active (draw_tool))
+ {
+ if (status)
+ gimp_tool_replace_status (tool, draw_tool->display, "%s", status);
+ else
+ gimp_tool_pop_status (tool, draw_tool->display);
+ }
+}
+
+static void
+gimp_draw_tool_widget_status_coords (GimpToolWidget *widget,
+ const gchar *title,
+ gdouble x,
+ const gchar *separator,
+ gdouble y,
+ const gchar *help,
+ GimpTool *tool)
+{
+ GimpDrawTool *draw_tool = GIMP_DRAW_TOOL (tool);
+
+ if (gimp_draw_tool_is_active (draw_tool))
+ {
+ gimp_tool_pop_status (tool, draw_tool->display);
+ gimp_tool_push_status_coords (tool, draw_tool->display,
+ gimp_tool_control_get_precision (
+ tool->control),
+ title, x, separator, y, help);
+ }
+}
+
+static void
+gimp_draw_tool_widget_message (GimpToolWidget *widget,
+ const gchar *message,
+ GimpTool *tool)
+{
+ GimpDrawTool *draw_tool = GIMP_DRAW_TOOL (tool);
+
+ if (gimp_draw_tool_is_active (draw_tool))
+ gimp_tool_message_literal (tool, draw_tool->display, message);
+}
+
+static void
+gimp_draw_tool_widget_snap_offsets (GimpToolWidget *widget,
+ gint offset_x,
+ gint offset_y,
+ gint width,
+ gint height,
+ GimpTool *tool)
+{
+ gimp_tool_control_set_snap_offsets (tool->control,
+ offset_x, offset_y,
+ width, height);
+}
+
+#ifdef USE_TIMEOUT
+static gboolean
+gimp_draw_tool_draw_timeout (GimpDrawTool *draw_tool)
+{
+ guint64 now = g_get_monotonic_time ();
+
+ /* keep the timeout running if the last drawing just happened */
+ if ((now - draw_tool->last_draw_time) <= MINIMUM_DRAW_INTERVAL)
+ return TRUE;
+
+ draw_tool->draw_timeout = 0;
+
+ gimp_draw_tool_draw (draw_tool);
+
+ return FALSE;
+}
+#endif
+
+static void
+gimp_draw_tool_draw (GimpDrawTool *draw_tool)
+{
+ guint64 now = g_get_monotonic_time ();
+
+ if (draw_tool->display &&
+ draw_tool->paused_count == 0 &&
+ (! draw_tool->draw_timeout ||
+ (now - draw_tool->last_draw_time) > MINIMUM_DRAW_INTERVAL))
+ {
+ GimpDisplayShell *shell = gimp_display_get_shell (draw_tool->display);
+
+ if (draw_tool->draw_timeout)
+ {
+ g_source_remove (draw_tool->draw_timeout);
+ draw_tool->draw_timeout = 0;
+ }
+
+ gimp_draw_tool_undraw (draw_tool);
+
+ GIMP_DRAW_TOOL_GET_CLASS (draw_tool)->draw (draw_tool);
+
+ if (draw_tool->group_stack)
+ {
+ g_warning ("%s: draw_tool->group_stack not empty after calling "
+ "GimpDrawTool::draw() of %s",
+ G_STRFUNC,
+ g_type_name (G_TYPE_FROM_INSTANCE (draw_tool)));
+
+ while (draw_tool->group_stack)
+ gimp_draw_tool_pop_group (draw_tool);
+ }
+
+ if (draw_tool->preview)
+ gimp_display_shell_add_preview_item (shell, draw_tool->preview);
+
+ if (draw_tool->item)
+ gimp_display_shell_add_tool_item (shell, draw_tool->item);
+
+#if 0
+ gimp_display_shell_flush (shell, TRUE);
+#endif
+
+ draw_tool->last_draw_time = g_get_monotonic_time ();
+
+#if 0
+ g_printerr ("drawing tool stuff took %f seconds\n",
+ (draw_tool->last_draw_time - now) / 1000000.0);
+#endif
+ }
+}
+
+static void
+gimp_draw_tool_undraw (GimpDrawTool *draw_tool)
+{
+ if (draw_tool->display)
+ {
+ GimpDisplayShell *shell = gimp_display_get_shell (draw_tool->display);
+
+ if (draw_tool->preview)
+ {
+ gimp_display_shell_remove_preview_item (shell, draw_tool->preview);
+ g_clear_object (&draw_tool->preview);
+ }
+
+ if (draw_tool->item)
+ {
+ gimp_display_shell_remove_tool_item (shell, draw_tool->item);
+ g_clear_object (&draw_tool->item);
+ }
+ }
+}
+
+static void
+gimp_draw_tool_real_draw (GimpDrawTool *draw_tool)
+{
+ if (draw_tool->widget)
+ {
+ GimpCanvasItem *item = gimp_tool_widget_get_item (draw_tool->widget);
+
+ gimp_draw_tool_add_item (draw_tool, item);
+ }
+}
+
+void
+gimp_draw_tool_start (GimpDrawTool *draw_tool,
+ GimpDisplay *display)
+{
+ g_return_if_fail (GIMP_IS_DRAW_TOOL (draw_tool));
+ g_return_if_fail (GIMP_IS_DISPLAY (display));
+ g_return_if_fail (gimp_draw_tool_is_active (draw_tool) == FALSE);
+
+ draw_tool->display = display;
+
+ gimp_draw_tool_draw (draw_tool);
+}
+
+void
+gimp_draw_tool_stop (GimpDrawTool *draw_tool)
+{
+ g_return_if_fail (GIMP_IS_DRAW_TOOL (draw_tool));
+ g_return_if_fail (gimp_draw_tool_is_active (draw_tool) == TRUE);
+
+ gimp_draw_tool_undraw (draw_tool);
+
+ if (draw_tool->draw_timeout)
+ {
+ g_source_remove (draw_tool->draw_timeout);
+ draw_tool->draw_timeout = 0;
+ }
+
+ draw_tool->last_draw_time = 0;
+
+ draw_tool->display = NULL;
+}
+
+gboolean
+gimp_draw_tool_is_active (GimpDrawTool *draw_tool)
+{
+ g_return_val_if_fail (GIMP_IS_DRAW_TOOL (draw_tool), FALSE);
+
+ return draw_tool->display != NULL;
+}
+
+void
+gimp_draw_tool_pause (GimpDrawTool *draw_tool)
+{
+ g_return_if_fail (GIMP_IS_DRAW_TOOL (draw_tool));
+
+ draw_tool->paused_count++;
+
+ if (draw_tool->draw_timeout)
+ {
+ g_source_remove (draw_tool->draw_timeout);
+ draw_tool->draw_timeout = 0;
+ }
+}
+
+void
+gimp_draw_tool_resume (GimpDrawTool *draw_tool)
+{
+ g_return_if_fail (GIMP_IS_DRAW_TOOL (draw_tool));
+ g_return_if_fail (draw_tool->paused_count > 0);
+
+ draw_tool->paused_count--;
+
+ if (draw_tool->paused_count == 0)
+ {
+#ifdef USE_TIMEOUT
+ /* Don't install the timeout if the draw tool isn't active, so
+ * suspend()/resume() can always be called, and have no side
+ * effect on an inactive tool. See bug #687851.
+ */
+ if (gimp_draw_tool_is_active (draw_tool) && ! draw_tool->draw_timeout)
+ {
+ draw_tool->draw_timeout =
+ gdk_threads_add_timeout_full (G_PRIORITY_HIGH_IDLE,
+ DRAW_TIMEOUT,
+ (GSourceFunc) gimp_draw_tool_draw_timeout,
+ draw_tool, NULL);
+ }
+#endif
+
+ /* call draw() anyway, it will do nothing if the timeout is
+ * running, but will additionally check the drawing times to
+ * ensure the minimum framerate
+ */
+ gimp_draw_tool_draw (draw_tool);
+ }
+}
+
+/**
+ * gimp_draw_tool_calc_distance:
+ * @draw_tool: a #GimpDrawTool
+ * @display: a #GimpDisplay
+ * @x1: start point X in image coordinates
+ * @y1: start point Y in image coordinates
+ * @x2: end point X in image coordinates
+ * @y2: end point Y in image coordinates
+ *
+ * If you just need to compare distances, consider to use
+ * gimp_draw_tool_calc_distance_square() instead.
+ *
+ * Returns: the distance between the given points in display coordinates
+ **/
+gdouble
+gimp_draw_tool_calc_distance (GimpDrawTool *draw_tool,
+ GimpDisplay *display,
+ gdouble x1,
+ gdouble y1,
+ gdouble x2,
+ gdouble y2)
+{
+ return sqrt (gimp_draw_tool_calc_distance_square (draw_tool, display,
+ x1, y1, x2, y2));
+}
+
+/**
+ * gimp_draw_tool_calc_distance_square:
+ * @draw_tool: a #GimpDrawTool
+ * @display: a #GimpDisplay
+ * @x1: start point X in image coordinates
+ * @y1: start point Y in image coordinates
+ * @x2: end point X in image coordinates
+ * @y2: end point Y in image coordinates
+ *
+ * This function is more effective than gimp_draw_tool_calc_distance()
+ * as it doesn't perform a sqrt(). Use this if you just need to compare
+ * distances.
+ *
+ * Returns: the square of the distance between the given points in
+ * display coordinates
+ **/
+gdouble
+gimp_draw_tool_calc_distance_square (GimpDrawTool *draw_tool,
+ GimpDisplay *display,
+ gdouble x1,
+ gdouble y1,
+ gdouble x2,
+ gdouble y2)
+{
+ GimpDisplayShell *shell;
+ gdouble tx1, ty1;
+ gdouble tx2, ty2;
+
+ g_return_val_if_fail (GIMP_IS_DRAW_TOOL (draw_tool), 0.0);
+ g_return_val_if_fail (GIMP_IS_DISPLAY (display), 0.0);
+
+ shell = gimp_display_get_shell (display);
+
+ gimp_display_shell_transform_xy_f (shell, x1, y1, &tx1, &ty1);
+ gimp_display_shell_transform_xy_f (shell, x2, y2, &tx2, &ty2);
+
+ return SQR (tx2 - tx1) + SQR (ty2 - ty1);
+}
+
+void
+gimp_draw_tool_set_widget (GimpDrawTool *draw_tool,
+ GimpToolWidget *widget)
+{
+ g_return_if_fail (GIMP_IS_DRAW_TOOL (draw_tool));
+ g_return_if_fail (widget == NULL || GIMP_IS_TOOL_WIDGET (widget));
+
+ if (widget == draw_tool->widget)
+ return;
+
+ if (draw_tool->widget)
+ {
+ gimp_tool_widget_set_focus (draw_tool->widget, FALSE);
+
+ g_signal_handlers_disconnect_by_func (draw_tool->widget,
+ gimp_draw_tool_widget_status,
+ draw_tool);
+ g_signal_handlers_disconnect_by_func (draw_tool->widget,
+ gimp_draw_tool_widget_status_coords,
+ draw_tool);
+ g_signal_handlers_disconnect_by_func (draw_tool->widget,
+ gimp_draw_tool_widget_message,
+ draw_tool);
+ g_signal_handlers_disconnect_by_func (draw_tool->widget,
+ gimp_draw_tool_widget_snap_offsets,
+ draw_tool);
+
+ if (gimp_draw_tool_is_active (draw_tool))
+ {
+ GimpCanvasItem *item = gimp_tool_widget_get_item (draw_tool->widget);
+
+ gimp_draw_tool_remove_item (draw_tool, item);
+ }
+
+ g_object_unref (draw_tool->widget);
+ }
+
+ draw_tool->widget = widget;
+
+ if (draw_tool->widget)
+ {
+ g_object_ref (draw_tool->widget);
+
+ if (gimp_draw_tool_is_active (draw_tool))
+ {
+ GimpCanvasItem *item = gimp_tool_widget_get_item (draw_tool->widget);
+
+ gimp_draw_tool_add_item (draw_tool, item);
+ }
+
+ g_signal_connect (draw_tool->widget, "status",
+ G_CALLBACK (gimp_draw_tool_widget_status),
+ draw_tool);
+ g_signal_connect (draw_tool->widget, "status-coords",
+ G_CALLBACK (gimp_draw_tool_widget_status_coords),
+ draw_tool);
+ g_signal_connect (draw_tool->widget, "message",
+ G_CALLBACK (gimp_draw_tool_widget_message),
+ draw_tool);
+ g_signal_connect (draw_tool->widget, "snap-offsets",
+ G_CALLBACK (gimp_draw_tool_widget_snap_offsets),
+ draw_tool);
+
+ gimp_tool_widget_set_focus (draw_tool->widget, TRUE);
+ }
+}
+
+void
+gimp_draw_tool_set_default_status (GimpDrawTool *draw_tool,
+ const gchar *status)
+{
+ g_return_if_fail (GIMP_IS_DRAW_TOOL (draw_tool));
+
+ if (draw_tool->default_status)
+ g_free (draw_tool->default_status);
+
+ draw_tool->default_status = g_strdup (status);
+}
+
+void
+gimp_draw_tool_add_preview (GimpDrawTool *draw_tool,
+ GimpCanvasItem *item)
+{
+ g_return_if_fail (GIMP_IS_DRAW_TOOL (draw_tool));
+ g_return_if_fail (GIMP_IS_CANVAS_ITEM (item));
+
+ if (! draw_tool->preview)
+ draw_tool->preview =
+ gimp_canvas_group_new (gimp_display_get_shell (draw_tool->display));
+
+ gimp_canvas_group_add_item (GIMP_CANVAS_GROUP (draw_tool->preview), item);
+}
+
+void
+gimp_draw_tool_remove_preview (GimpDrawTool *draw_tool,
+ GimpCanvasItem *item)
+{
+ g_return_if_fail (GIMP_IS_DRAW_TOOL (draw_tool));
+ g_return_if_fail (GIMP_IS_CANVAS_ITEM (item));
+ g_return_if_fail (draw_tool->preview != NULL);
+
+ gimp_canvas_group_remove_item (GIMP_CANVAS_GROUP (draw_tool->preview), item);
+}
+
+void
+gimp_draw_tool_add_item (GimpDrawTool *draw_tool,
+ GimpCanvasItem *item)
+{
+ GimpCanvasGroup *group;
+
+ g_return_if_fail (GIMP_IS_DRAW_TOOL (draw_tool));
+ g_return_if_fail (GIMP_IS_CANVAS_ITEM (item));
+
+ if (! draw_tool->item)
+ draw_tool->item =
+ gimp_canvas_group_new (gimp_display_get_shell (draw_tool->display));
+
+ group = GIMP_CANVAS_GROUP (draw_tool->item);
+
+ if (draw_tool->group_stack)
+ group = draw_tool->group_stack->data;
+
+ gimp_canvas_group_add_item (group, item);
+}
+
+void
+gimp_draw_tool_remove_item (GimpDrawTool *draw_tool,
+ GimpCanvasItem *item)
+{
+ g_return_if_fail (GIMP_IS_DRAW_TOOL (draw_tool));
+ g_return_if_fail (GIMP_IS_CANVAS_ITEM (item));
+ g_return_if_fail (draw_tool->item != NULL);
+
+ gimp_canvas_group_remove_item (GIMP_CANVAS_GROUP (draw_tool->item), item);
+}
+
+GimpCanvasGroup *
+gimp_draw_tool_add_stroke_group (GimpDrawTool *draw_tool)
+{
+ GimpCanvasItem *item;
+
+ g_return_val_if_fail (GIMP_IS_DRAW_TOOL (draw_tool), NULL);
+
+ item = gimp_canvas_group_new (gimp_display_get_shell (draw_tool->display));
+ gimp_canvas_group_set_group_stroking (GIMP_CANVAS_GROUP (item), TRUE);
+
+ gimp_draw_tool_add_item (draw_tool, item);
+ g_object_unref (item);
+
+ return GIMP_CANVAS_GROUP (item);
+}
+
+GimpCanvasGroup *
+gimp_draw_tool_add_fill_group (GimpDrawTool *draw_tool)
+{
+ GimpCanvasItem *item;
+
+ g_return_val_if_fail (GIMP_IS_DRAW_TOOL (draw_tool), NULL);
+
+ item = gimp_canvas_group_new (gimp_display_get_shell (draw_tool->display));
+ gimp_canvas_group_set_group_filling (GIMP_CANVAS_GROUP (item), TRUE);
+
+ gimp_draw_tool_add_item (draw_tool, item);
+ g_object_unref (item);
+
+ return GIMP_CANVAS_GROUP (item);
+}
+
+void
+gimp_draw_tool_push_group (GimpDrawTool *draw_tool,
+ GimpCanvasGroup *group)
+{
+ g_return_if_fail (GIMP_IS_DRAW_TOOL (draw_tool));
+ g_return_if_fail (GIMP_IS_CANVAS_GROUP (group));
+
+ draw_tool->group_stack = g_list_prepend (draw_tool->group_stack, group);
+}
+
+void
+gimp_draw_tool_pop_group (GimpDrawTool *draw_tool)
+{
+ g_return_if_fail (GIMP_IS_DRAW_TOOL (draw_tool));
+ g_return_if_fail (draw_tool->group_stack != NULL);
+
+ draw_tool->group_stack = g_list_remove (draw_tool->group_stack,
+ draw_tool->group_stack->data);
+}
+
+/**
+ * gimp_draw_tool_add_line:
+ * @draw_tool: the #GimpDrawTool
+ * @x1: start point X in image coordinates
+ * @y1: start point Y in image coordinates
+ * @x2: end point X in image coordinates
+ * @y2: end point Y in image coordinates
+ *
+ * This function takes image space coordinates and transforms them to
+ * screen window coordinates, then draws a line between the resulting
+ * coordindates.
+ **/
+GimpCanvasItem *
+gimp_draw_tool_add_line (GimpDrawTool *draw_tool,
+ gdouble x1,
+ gdouble y1,
+ gdouble x2,
+ gdouble y2)
+{
+ GimpCanvasItem *item;
+
+ g_return_val_if_fail (GIMP_IS_DRAW_TOOL (draw_tool), NULL);
+
+ item = gimp_canvas_line_new (gimp_display_get_shell (draw_tool->display),
+ x1, y1, x2, y2);
+
+ gimp_draw_tool_add_item (draw_tool, item);
+ g_object_unref (item);
+
+ return item;
+}
+
+/**
+ * gimp_draw_tool_add_guide:
+ * @draw_tool: the #GimpDrawTool
+ * @orientation: the orientation of the guide line
+ * @position: the position of the guide line in image coordinates
+ *
+ * This function draws a guide line across the canvas.
+ **/
+GimpCanvasItem *
+gimp_draw_tool_add_guide (GimpDrawTool *draw_tool,
+ GimpOrientationType orientation,
+ gint position,
+ GimpGuideStyle style)
+{
+ GimpCanvasItem *item;
+
+ g_return_val_if_fail (GIMP_IS_DRAW_TOOL (draw_tool), NULL);
+
+ item = gimp_canvas_guide_new (gimp_display_get_shell (draw_tool->display),
+ orientation, position,
+ style);
+
+ gimp_draw_tool_add_item (draw_tool, item);
+ g_object_unref (item);
+
+ return item;
+}
+
+/**
+ * gimp_draw_tool_add_crosshair:
+ * @draw_tool: the #GimpDrawTool
+ * @position_x: the position of the vertical guide line in image coordinates
+ * @position_y: the position of the horizontal guide line in image coordinates
+ *
+ * This function draws two crossing guide lines across the canvas.
+ **/
+GimpCanvasItem *
+gimp_draw_tool_add_crosshair (GimpDrawTool *draw_tool,
+ gint position_x,
+ gint position_y)
+{
+ GimpCanvasGroup *group;
+
+ group = gimp_draw_tool_add_stroke_group (draw_tool);
+
+ gimp_draw_tool_push_group (draw_tool, group);
+ gimp_draw_tool_add_guide (draw_tool,
+ GIMP_ORIENTATION_VERTICAL, position_x,
+ GIMP_GUIDE_STYLE_NONE);
+ gimp_draw_tool_add_guide (draw_tool,
+ GIMP_ORIENTATION_HORIZONTAL, position_y,
+ GIMP_GUIDE_STYLE_NONE);
+ gimp_draw_tool_pop_group (draw_tool);
+
+ return GIMP_CANVAS_ITEM (group);
+}
+
+/**
+ * gimp_draw_tool_add_sample_point:
+ * @draw_tool: the #GimpDrawTool
+ * @x: X position of the sample point
+ * @y: Y position of the sample point
+ * @index: Index of the sample point
+ *
+ * This function draws a sample point
+ **/
+GimpCanvasItem *
+gimp_draw_tool_add_sample_point (GimpDrawTool *draw_tool,
+ gint x,
+ gint y,
+ gint index)
+{
+ GimpCanvasItem *item;
+
+ g_return_val_if_fail (GIMP_IS_DRAW_TOOL (draw_tool), NULL);
+
+ item = gimp_canvas_sample_point_new (gimp_display_get_shell (draw_tool->display),
+ x, y, index, TRUE);
+
+ gimp_draw_tool_add_item (draw_tool, item);
+ g_object_unref (item);
+
+ return item;
+}
+
+/**
+ * gimp_draw_tool_add_rectangle:
+ * @draw_tool: the #GimpDrawTool
+ * @filled: whether to fill the rectangle
+ * @x: horizontal image coordinate
+ * @y: vertical image coordinate
+ * @width: width in image coordinates
+ * @height: height in image coordinates
+ *
+ * This function takes image space coordinates and transforms them to
+ * screen window coordinates, then draws the resulting rectangle.
+ **/
+GimpCanvasItem *
+gimp_draw_tool_add_rectangle (GimpDrawTool *draw_tool,
+ gboolean filled,
+ gdouble x,
+ gdouble y,
+ gdouble width,
+ gdouble height)
+{
+ GimpCanvasItem *item;
+
+ g_return_val_if_fail (GIMP_IS_DRAW_TOOL (draw_tool), NULL);
+
+ item = gimp_canvas_rectangle_new (gimp_display_get_shell (draw_tool->display),
+ x, y, width, height, filled);
+
+ gimp_draw_tool_add_item (draw_tool, item);
+ g_object_unref (item);
+
+ return item;
+}
+
+GimpCanvasItem *
+gimp_draw_tool_add_arc (GimpDrawTool *draw_tool,
+ gboolean filled,
+ gdouble x,
+ gdouble y,
+ gdouble width,
+ gdouble height,
+ gdouble start_angle,
+ gdouble slice_angle)
+{
+ GimpCanvasItem *item;
+
+ g_return_val_if_fail (GIMP_IS_DRAW_TOOL (draw_tool), NULL);
+
+ item = gimp_canvas_arc_new (gimp_display_get_shell (draw_tool->display),
+ x + width / 2.0,
+ y + height / 2.0,
+ width / 2.0,
+ height / 2.0,
+ start_angle,
+ slice_angle,
+ filled);
+
+ gimp_draw_tool_add_item (draw_tool, item);
+ g_object_unref (item);
+
+ return item;
+}
+
+GimpCanvasItem *
+gimp_draw_tool_add_handle (GimpDrawTool *draw_tool,
+ GimpHandleType type,
+ gdouble x,
+ gdouble y,
+ gint width,
+ gint height,
+ GimpHandleAnchor anchor)
+{
+ GimpCanvasItem *item;
+
+ g_return_val_if_fail (GIMP_IS_DRAW_TOOL (draw_tool), NULL);
+
+ item = gimp_canvas_handle_new (gimp_display_get_shell (draw_tool->display),
+ type, anchor, x, y, width, height);
+
+ gimp_draw_tool_add_item (draw_tool, item);
+ g_object_unref (item);
+
+ return item;
+}
+
+GimpCanvasItem *
+gimp_draw_tool_add_lines (GimpDrawTool *draw_tool,
+ const GimpVector2 *points,
+ gint n_points,
+ GimpMatrix3 *transform,
+ gboolean filled)
+{
+ GimpCanvasItem *item;
+
+ g_return_val_if_fail (GIMP_IS_DRAW_TOOL (draw_tool), NULL);
+
+ if (points == NULL || n_points < 2)
+ return NULL;
+
+ item = gimp_canvas_polygon_new (gimp_display_get_shell (draw_tool->display),
+ points, n_points, transform, filled);
+
+ gimp_draw_tool_add_item (draw_tool, item);
+ g_object_unref (item);
+
+ return item;
+}
+
+GimpCanvasItem *
+gimp_draw_tool_add_strokes (GimpDrawTool *draw_tool,
+ const GimpCoords *points,
+ gint n_points,
+ GimpMatrix3 *transform,
+ gboolean filled)
+{
+ GimpCanvasItem *item;
+
+ g_return_val_if_fail (GIMP_IS_DRAW_TOOL (draw_tool), NULL);
+
+ if (points == NULL || n_points < 2)
+ return NULL;
+
+ item = gimp_canvas_polygon_new_from_coords (gimp_display_get_shell (draw_tool->display),
+ points, n_points, transform, filled);
+
+ gimp_draw_tool_add_item (draw_tool, item);
+ g_object_unref (item);
+
+ return item;
+}
+
+GimpCanvasItem *
+gimp_draw_tool_add_pen (GimpDrawTool *draw_tool,
+ const GimpVector2 *points,
+ gint n_points,
+ GimpContext *context,
+ GimpActiveColor color,
+ gint width)
+{
+ GimpCanvasItem *item;
+
+ g_return_val_if_fail (GIMP_IS_DRAW_TOOL (draw_tool), NULL);
+
+ if (points == NULL || n_points < 2)
+ return NULL;
+
+ item = gimp_canvas_pen_new (gimp_display_get_shell (draw_tool->display),
+ points, n_points, context, color, width);
+
+ gimp_draw_tool_add_item (draw_tool, item);
+ g_object_unref (item);
+
+ return item;
+}
+
+/**
+ * gimp_draw_tool_add_boundary:
+ * @draw_tool: a #GimpDrawTool
+ * @bound_segs: the sorted brush outline
+ * @n_bound_segs: the number of segments in @bound_segs
+ * @matrix: transform matrix for the boundary
+ * @offset_x: x offset
+ * @offset_y: y offset
+ *
+ * Draw the boundary of the brush that @draw_tool uses. The boundary
+ * should be sorted with sort_boundary(), and @n_bound_segs should
+ * include the sentinel segments inserted by sort_boundary() that
+ * indicate the end of connected segment sequences (groups) .
+ */
+GimpCanvasItem *
+gimp_draw_tool_add_boundary (GimpDrawTool *draw_tool,
+ const GimpBoundSeg *bound_segs,
+ gint n_bound_segs,
+ GimpMatrix3 *transform,
+ gdouble offset_x,
+ gdouble offset_y)
+{
+ GimpCanvasItem *item;
+
+ g_return_val_if_fail (GIMP_IS_DRAW_TOOL (draw_tool), NULL);
+ g_return_val_if_fail (n_bound_segs > 0, NULL);
+ g_return_val_if_fail (bound_segs != NULL, NULL);
+
+ item = gimp_canvas_boundary_new (gimp_display_get_shell (draw_tool->display),
+ bound_segs, n_bound_segs,
+ transform,
+ offset_x, offset_y);
+
+ gimp_draw_tool_add_item (draw_tool, item);
+ g_object_unref (item);
+
+ return item;
+}
+
+GimpCanvasItem *
+gimp_draw_tool_add_text_cursor (GimpDrawTool *draw_tool,
+ PangoRectangle *cursor,
+ gboolean overwrite,
+ GimpTextDirection direction)
+{
+ GimpCanvasItem *item;
+
+ g_return_val_if_fail (GIMP_IS_DRAW_TOOL (draw_tool), NULL);
+
+ item = gimp_canvas_text_cursor_new (gimp_display_get_shell (draw_tool->display),
+ cursor, overwrite, direction);
+
+ gimp_draw_tool_add_item (draw_tool, item);
+ g_object_unref (item);
+
+ return item;
+}
+
+GimpCanvasItem *
+gimp_draw_tool_add_transform_preview (GimpDrawTool *draw_tool,
+ GimpPickable *pickable,
+ const GimpMatrix3 *transform,
+ gdouble x1,
+ gdouble y1,
+ gdouble x2,
+ gdouble y2)
+{
+ GimpCanvasItem *item;
+
+ g_return_val_if_fail (GIMP_IS_DRAW_TOOL (draw_tool), NULL);
+ g_return_val_if_fail (GIMP_IS_PICKABLE (pickable), NULL);
+ g_return_val_if_fail (transform != NULL, NULL);
+
+ item = gimp_canvas_transform_preview_new (gimp_display_get_shell (draw_tool->display),
+ pickable, transform,
+ x1, y1, x2, y2);
+
+ gimp_draw_tool_add_preview (draw_tool, item);
+ g_object_unref (item);
+
+ return item;
+}
+
+gboolean
+gimp_draw_tool_on_handle (GimpDrawTool *draw_tool,
+ GimpDisplay *display,
+ gdouble x,
+ gdouble y,
+ GimpHandleType type,
+ gdouble handle_x,
+ gdouble handle_y,
+ gint width,
+ gint height,
+ GimpHandleAnchor anchor)
+{
+ GimpDisplayShell *shell;
+ gdouble tx, ty;
+ gdouble handle_tx, handle_ty;
+
+ g_return_val_if_fail (GIMP_IS_DRAW_TOOL (draw_tool), FALSE);
+ g_return_val_if_fail (GIMP_IS_DISPLAY (display), FALSE);
+
+ shell = gimp_display_get_shell (display);
+
+ gimp_display_shell_zoom_xy_f (shell,
+ x, y,
+ &tx, &ty);
+ gimp_display_shell_zoom_xy_f (shell,
+ handle_x, handle_y,
+ &handle_tx, &handle_ty);
+
+ switch (type)
+ {
+ case GIMP_HANDLE_SQUARE:
+ case GIMP_HANDLE_FILLED_SQUARE:
+ case GIMP_HANDLE_CROSS:
+ case GIMP_HANDLE_CROSSHAIR:
+ gimp_canvas_item_shift_to_north_west (anchor,
+ handle_tx, handle_ty,
+ width, height,
+ &handle_tx, &handle_ty);
+
+ return (tx == CLAMP (tx, handle_tx, handle_tx + width) &&
+ ty == CLAMP (ty, handle_ty, handle_ty + height));
+
+ case GIMP_HANDLE_CIRCLE:
+ case GIMP_HANDLE_FILLED_CIRCLE:
+ gimp_canvas_item_shift_to_center (anchor,
+ handle_tx, handle_ty,
+ width, height,
+ &handle_tx, &handle_ty);
+
+ /* FIXME */
+ if (width != height)
+ width = (width + height) / 2;
+
+ width /= 2;
+
+ return ((SQR (handle_tx - tx) + SQR (handle_ty - ty)) < SQR (width));
+
+ default:
+ g_warning ("%s: invalid handle type %d", G_STRFUNC, type);
+ break;
+ }
+
+ return FALSE;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-19 13:06:05 +0000