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-rw-r--r--app/tools/gimpfreeselecttool.c355
1 files changed, 355 insertions, 0 deletions
diff --git a/app/tools/gimpfreeselecttool.c b/app/tools/gimpfreeselecttool.c
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+++ b/app/tools/gimpfreeselecttool.c
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+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * Major improvement to support polygonal segments
+ * Copyright (C) 2008 Martin Nordholts
+ *
+ * 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 "libgimpwidgets/gimpwidgets.h"
+
+#include "tools-types.h"
+
+#include "core/gimpchannel.h"
+#include "core/gimpchannel-select.h"
+#include "core/gimpimage.h"
+#include "core/gimplayer-floating-selection.h"
+
+#include "widgets/gimphelp-ids.h"
+
+#include "display/gimpdisplay.h"
+#include "display/gimptoolpolygon.h"
+
+#include "gimpfreeselecttool.h"
+#include "gimpselectionoptions.h"
+#include "gimptoolcontrol.h"
+
+#include "gimp-intl.h"
+
+
+struct _GimpFreeSelectToolPrivate
+{
+ gboolean started;
+ gboolean changed;
+
+ /* The selection operation active when the tool was started */
+ GimpChannelOps operation_at_start;
+};
+
+
+static void gimp_free_select_tool_control (GimpTool *tool,
+ GimpToolAction action,
+ GimpDisplay *display);
+static void gimp_free_select_tool_button_press (GimpTool *tool,
+ const GimpCoords *coords,
+ guint32 time,
+ GdkModifierType state,
+ GimpButtonPressType press_type,
+ GimpDisplay *display);
+static void gimp_free_select_tool_button_release (GimpTool *tool,
+ const GimpCoords *coords,
+ guint32 time,
+ GdkModifierType state,
+ GimpButtonReleaseType release_type,
+ GimpDisplay *display);
+static void gimp_free_select_tool_options_notify (GimpTool *tool,
+ GimpToolOptions *options,
+ const GParamSpec *pspec);
+
+static gboolean gimp_free_select_tool_have_selection (GimpSelectionTool *sel_tool,
+ GimpDisplay *display);
+
+static void gimp_free_select_tool_change_complete (GimpPolygonSelectTool *poly_sel,
+ GimpDisplay *display);
+
+static void gimp_free_select_tool_commit (GimpFreeSelectTool *free_sel,
+ GimpDisplay *display);
+static void gimp_free_select_tool_halt (GimpFreeSelectTool *free_sel);
+
+static gboolean gimp_free_select_tool_select (GimpFreeSelectTool *free_sel,
+ GimpDisplay *display);
+
+
+G_DEFINE_TYPE_WITH_PRIVATE (GimpFreeSelectTool, gimp_free_select_tool,
+ GIMP_TYPE_POLYGON_SELECT_TOOL)
+
+#define parent_class gimp_free_select_tool_parent_class
+
+
+void
+gimp_free_select_tool_register (GimpToolRegisterCallback callback,
+ gpointer data)
+{
+ (* callback) (GIMP_TYPE_FREE_SELECT_TOOL,
+ GIMP_TYPE_SELECTION_OPTIONS,
+ gimp_selection_options_gui,
+ 0,
+ "gimp-free-select-tool",
+ _("Free Select"),
+ _("Free Select Tool: Select a hand-drawn region with free "
+ "and polygonal segments"),
+ N_("_Free Select"), "F",
+ NULL, GIMP_HELP_TOOL_FREE_SELECT,
+ GIMP_ICON_TOOL_FREE_SELECT,
+ data);
+}
+
+static void
+gimp_free_select_tool_class_init (GimpFreeSelectToolClass *klass)
+{
+ GimpToolClass *tool_class = GIMP_TOOL_CLASS (klass);
+ GimpSelectionToolClass *sel_class = GIMP_SELECTION_TOOL_CLASS (klass);
+ GimpPolygonSelectToolClass *poly_sel_class = GIMP_POLYGON_SELECT_TOOL_CLASS (klass);
+
+ tool_class->control = gimp_free_select_tool_control;
+ tool_class->button_press = gimp_free_select_tool_button_press;
+ tool_class->button_release = gimp_free_select_tool_button_release;
+ tool_class->options_notify = gimp_free_select_tool_options_notify;
+
+ sel_class->have_selection = gimp_free_select_tool_have_selection;
+
+ poly_sel_class->change_complete = gimp_free_select_tool_change_complete;
+}
+
+static void
+gimp_free_select_tool_init (GimpFreeSelectTool *free_sel)
+{
+ GimpTool *tool = GIMP_TOOL (free_sel);
+ GimpSelectionTool *sel_tool = GIMP_SELECTION_TOOL (tool);
+
+ free_sel->priv = gimp_free_select_tool_get_instance_private (free_sel);
+
+ gimp_tool_control_set_preserve (tool->control, FALSE);
+ gimp_tool_control_set_dirty_mask (tool->control,
+ GIMP_DIRTY_SELECTION);
+ gimp_tool_control_set_dirty_action (tool->control,
+ GIMP_TOOL_ACTION_COMMIT);
+ gimp_tool_control_set_tool_cursor (tool->control,
+ GIMP_TOOL_CURSOR_FREE_SELECT);
+
+ sel_tool->allow_move = TRUE;
+}
+
+static void
+gimp_free_select_tool_control (GimpTool *tool,
+ GimpToolAction action,
+ GimpDisplay *display)
+{
+ GimpFreeSelectTool *free_sel = GIMP_FREE_SELECT_TOOL (tool);
+
+ switch (action)
+ {
+ case GIMP_TOOL_ACTION_PAUSE:
+ case GIMP_TOOL_ACTION_RESUME:
+ break;
+
+ case GIMP_TOOL_ACTION_HALT:
+ gimp_free_select_tool_halt (free_sel);
+ break;
+
+ case GIMP_TOOL_ACTION_COMMIT:
+ gimp_free_select_tool_commit (free_sel, display);
+ break;
+ }
+
+ GIMP_TOOL_CLASS (parent_class)->control (tool, action, display);
+}
+
+static void
+gimp_free_select_tool_button_press (GimpTool *tool,
+ const GimpCoords *coords,
+ guint32 time,
+ GdkModifierType state,
+ GimpButtonPressType press_type,
+ GimpDisplay *display)
+{
+ GimpSelectionOptions *options = GIMP_SELECTION_TOOL_GET_OPTIONS (tool);
+ GimpFreeSelectTool *free_sel = GIMP_FREE_SELECT_TOOL (tool);
+ GimpPolygonSelectTool *poly_sel = GIMP_POLYGON_SELECT_TOOL (tool);
+ GimpFreeSelectToolPrivate *priv = free_sel->priv;
+
+ if (press_type == GIMP_BUTTON_PRESS_NORMAL &&
+ gimp_selection_tool_start_edit (GIMP_SELECTION_TOOL (poly_sel),
+ display, coords))
+ return;
+
+ GIMP_TOOL_CLASS (parent_class)->button_press (tool, coords, time, state,
+ press_type, display);
+
+ if (press_type == GIMP_BUTTON_PRESS_NORMAL &&
+ gimp_polygon_select_tool_is_grabbed (poly_sel))
+ {
+ if (! priv->started)
+ {
+ priv->started = TRUE;
+ priv->operation_at_start = options->operation;
+ }
+
+ gimp_selection_tool_start_change (
+ GIMP_SELECTION_TOOL (tool),
+ ! gimp_polygon_select_tool_is_closed (poly_sel),
+ priv->operation_at_start);
+
+ priv->changed = FALSE;
+ }
+}
+
+static void
+gimp_free_select_tool_button_release (GimpTool *tool,
+ const GimpCoords *coords,
+ guint32 time,
+ GdkModifierType state,
+ GimpButtonReleaseType release_type,
+ GimpDisplay *display)
+{
+ GimpFreeSelectTool *free_sel = GIMP_FREE_SELECT_TOOL (tool);
+ GimpPolygonSelectTool *poly_sel = GIMP_POLYGON_SELECT_TOOL (tool);
+ GimpFreeSelectToolPrivate *priv = free_sel->priv;
+
+ if (gimp_polygon_select_tool_is_grabbed (poly_sel))
+ {
+ gimp_selection_tool_end_change (GIMP_SELECTION_TOOL (tool),
+ ! priv->changed);
+
+ priv->changed = FALSE;
+ }
+
+ GIMP_TOOL_CLASS (parent_class)->button_release (tool, coords, time, state,
+ release_type, display);
+}
+
+static void
+gimp_free_select_tool_options_notify (GimpTool *tool,
+ GimpToolOptions *options,
+ const GParamSpec *pspec)
+{
+ if (! strcmp (pspec->name, "antialias") ||
+ ! strcmp (pspec->name, "feather") ||
+ ! strcmp (pspec->name, "feather-radius"))
+ {
+ if (tool->display)
+ {
+ gimp_free_select_tool_change_complete (
+ GIMP_POLYGON_SELECT_TOOL (tool), tool->display);
+ }
+ }
+
+ GIMP_TOOL_CLASS (parent_class)->options_notify (tool, options, pspec);
+}
+
+static gboolean
+gimp_free_select_tool_have_selection (GimpSelectionTool *sel_tool,
+ GimpDisplay *display)
+{
+ GimpPolygonSelectTool *poly_sel = GIMP_POLYGON_SELECT_TOOL (sel_tool);
+ GimpTool *tool = GIMP_TOOL (sel_tool);
+
+ if (display == tool->display)
+ {
+ gint n_points;
+
+ gimp_polygon_select_tool_get_points (poly_sel, NULL, &n_points);
+
+ if (n_points > 2)
+ return TRUE;
+ }
+
+ return GIMP_SELECTION_TOOL_CLASS (parent_class)->have_selection (sel_tool,
+ display);
+}
+
+static void
+gimp_free_select_tool_change_complete (GimpPolygonSelectTool *poly_sel,
+ GimpDisplay *display)
+{
+ GimpFreeSelectTool *free_sel = GIMP_FREE_SELECT_TOOL (poly_sel);
+ GimpFreeSelectToolPrivate *priv = free_sel->priv;
+
+ priv->changed = TRUE;
+
+ gimp_selection_tool_start_change (GIMP_SELECTION_TOOL (free_sel),
+ FALSE,
+ priv->operation_at_start);
+
+ if (gimp_polygon_select_tool_is_closed (poly_sel))
+ gimp_free_select_tool_select (free_sel, display);
+
+ gimp_selection_tool_end_change (GIMP_SELECTION_TOOL (free_sel),
+ FALSE);
+}
+
+static void
+gimp_free_select_tool_halt (GimpFreeSelectTool *free_sel)
+{
+ GimpFreeSelectToolPrivate *priv = free_sel->priv;
+
+ priv->started = FALSE;
+}
+
+static void
+gimp_free_select_tool_commit (GimpFreeSelectTool *free_sel,
+ GimpDisplay *display)
+{
+ GimpPolygonSelectTool *poly_sel = GIMP_POLYGON_SELECT_TOOL (free_sel);
+
+ if (! gimp_polygon_select_tool_is_closed (poly_sel))
+ {
+ if (gimp_free_select_tool_select (free_sel, display))
+ gimp_image_flush (gimp_display_get_image (display));
+ }
+}
+
+static gboolean
+gimp_free_select_tool_select (GimpFreeSelectTool *free_sel,
+ GimpDisplay *display)
+{
+ GimpSelectionOptions *options = GIMP_SELECTION_TOOL_GET_OPTIONS (free_sel);
+ GimpTool *tool = GIMP_TOOL (free_sel);
+ GimpFreeSelectToolPrivate *priv = free_sel->priv;
+ GimpImage *image = gimp_display_get_image (display);
+ const GimpVector2 *points;
+ gint n_points;
+
+ gimp_polygon_select_tool_get_points (GIMP_POLYGON_SELECT_TOOL (free_sel),
+ &points, &n_points);
+
+ if (n_points > 2)
+ {
+ /* prevent this change from halting the tool */
+ gimp_tool_control_push_preserve (tool->control, TRUE);
+
+ gimp_channel_select_polygon (gimp_image_get_mask (image),
+ C_("command", "Free Select"),
+ n_points,
+ points,
+ priv->operation_at_start,
+ options->antialias,
+ options->feather,
+ options->feather_radius,
+ options->feather_radius,
+ TRUE);
+
+ gimp_tool_control_pop_preserve (tool->control);
+
+ return TRUE;
+ }
+
+ return FALSE;
+}
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