360 lines
13 KiB
C
360 lines
13 KiB
C
/* PIKA - Photo and Image Kooker Application
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* a rebranding of The GNU Image Manipulation Program (created with heckimp)
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* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
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*
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* Original copyright, applying to most contents (license remains unchanged):
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* Major improvement to support polygonal segments
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* Copyright (C) 2008 Martin Nordholts
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <gegl.h>
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#include <gtk/gtk.h>
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#include "libpikawidgets/pikawidgets.h"
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#include "tools-types.h"
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#include "core/pikachannel.h"
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#include "core/pikachannel-select.h"
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#include "core/pikaimage.h"
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#include "core/pikalayer-floating-selection.h"
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#include "widgets/pikahelp-ids.h"
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#include "display/pikadisplay.h"
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#include "display/pikatoolpolygon.h"
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#include "pikafreeselecttool.h"
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#include "pikaselectionoptions.h"
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#include "pikatoolcontrol.h"
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#include "pika-intl.h"
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struct _PikaFreeSelectToolPrivate
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{
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gboolean started;
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gboolean changed;
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/* The selection operation active when the tool was started */
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PikaChannelOps operation_at_start;
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};
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static void pika_free_select_tool_control (PikaTool *tool,
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PikaToolAction action,
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PikaDisplay *display);
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static void pika_free_select_tool_button_press (PikaTool *tool,
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const PikaCoords *coords,
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guint32 time,
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GdkModifierType state,
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PikaButtonPressType press_type,
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PikaDisplay *display);
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static void pika_free_select_tool_button_release (PikaTool *tool,
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const PikaCoords *coords,
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guint32 time,
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GdkModifierType state,
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PikaButtonReleaseType release_type,
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PikaDisplay *display);
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static void pika_free_select_tool_options_notify (PikaTool *tool,
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PikaToolOptions *options,
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const GParamSpec *pspec);
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static gboolean pika_free_select_tool_have_selection (PikaSelectionTool *sel_tool,
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PikaDisplay *display);
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static void pika_free_select_tool_change_complete (PikaPolygonSelectTool *poly_sel,
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PikaDisplay *display);
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static void pika_free_select_tool_commit (PikaFreeSelectTool *free_sel,
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PikaDisplay *display);
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static void pika_free_select_tool_halt (PikaFreeSelectTool *free_sel);
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static gboolean pika_free_select_tool_select (PikaFreeSelectTool *free_sel,
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PikaDisplay *display);
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G_DEFINE_TYPE_WITH_PRIVATE (PikaFreeSelectTool, pika_free_select_tool,
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PIKA_TYPE_POLYGON_SELECT_TOOL)
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#define parent_class pika_free_select_tool_parent_class
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void
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pika_free_select_tool_register (PikaToolRegisterCallback callback,
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gpointer data)
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{
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(* callback) (PIKA_TYPE_FREE_SELECT_TOOL,
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PIKA_TYPE_SELECTION_OPTIONS,
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pika_selection_options_gui,
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0,
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"pika-free-select-tool",
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_("Free Select"),
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_("Free Select Tool: Select a hand-drawn region with free "
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"and polygonal segments"),
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N_("_Free Select"), "F",
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NULL, PIKA_HELP_TOOL_FREE_SELECT,
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PIKA_ICON_TOOL_FREE_SELECT,
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data);
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}
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static void
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pika_free_select_tool_class_init (PikaFreeSelectToolClass *klass)
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{
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PikaToolClass *tool_class = PIKA_TOOL_CLASS (klass);
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PikaSelectionToolClass *sel_class = PIKA_SELECTION_TOOL_CLASS (klass);
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PikaPolygonSelectToolClass *poly_sel_class = PIKA_POLYGON_SELECT_TOOL_CLASS (klass);
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tool_class->control = pika_free_select_tool_control;
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tool_class->button_press = pika_free_select_tool_button_press;
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tool_class->button_release = pika_free_select_tool_button_release;
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tool_class->options_notify = pika_free_select_tool_options_notify;
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sel_class->have_selection = pika_free_select_tool_have_selection;
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poly_sel_class->change_complete = pika_free_select_tool_change_complete;
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}
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static void
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pika_free_select_tool_init (PikaFreeSelectTool *free_sel)
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{
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PikaTool *tool = PIKA_TOOL (free_sel);
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PikaSelectionTool *sel_tool = PIKA_SELECTION_TOOL (tool);
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free_sel->priv = pika_free_select_tool_get_instance_private (free_sel);
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pika_tool_control_set_preserve (tool->control, FALSE);
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pika_tool_control_set_dirty_mask (tool->control,
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PIKA_DIRTY_SELECTION);
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pika_tool_control_set_dirty_action (tool->control,
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PIKA_TOOL_ACTION_COMMIT);
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pika_tool_control_set_tool_cursor (tool->control,
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PIKA_TOOL_CURSOR_FREE_SELECT);
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sel_tool->allow_move = TRUE;
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}
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static void
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pika_free_select_tool_control (PikaTool *tool,
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PikaToolAction action,
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PikaDisplay *display)
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{
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PikaFreeSelectTool *free_sel = PIKA_FREE_SELECT_TOOL (tool);
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switch (action)
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{
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case PIKA_TOOL_ACTION_PAUSE:
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case PIKA_TOOL_ACTION_RESUME:
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break;
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case PIKA_TOOL_ACTION_HALT:
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pika_free_select_tool_halt (free_sel);
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break;
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case PIKA_TOOL_ACTION_COMMIT:
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pika_free_select_tool_commit (free_sel, display);
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break;
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}
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PIKA_TOOL_CLASS (parent_class)->control (tool, action, display);
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}
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static void
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pika_free_select_tool_button_press (PikaTool *tool,
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const PikaCoords *coords,
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guint32 time,
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GdkModifierType state,
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PikaButtonPressType press_type,
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PikaDisplay *display)
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{
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PikaSelectionOptions *options = PIKA_SELECTION_TOOL_GET_OPTIONS (tool);
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PikaFreeSelectTool *free_sel = PIKA_FREE_SELECT_TOOL (tool);
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PikaPolygonSelectTool *poly_sel = PIKA_POLYGON_SELECT_TOOL (tool);
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PikaFreeSelectToolPrivate *priv = free_sel->priv;
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if (press_type == PIKA_BUTTON_PRESS_NORMAL &&
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pika_selection_tool_start_edit (PIKA_SELECTION_TOOL (poly_sel),
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display, coords))
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return;
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PIKA_TOOL_CLASS (parent_class)->button_press (tool, coords, time, state,
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press_type, display);
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if (press_type == PIKA_BUTTON_PRESS_NORMAL &&
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pika_polygon_select_tool_is_grabbed (poly_sel))
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{
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if (! priv->started)
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{
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priv->started = TRUE;
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priv->operation_at_start = options->operation;
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}
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pika_selection_tool_start_change (
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PIKA_SELECTION_TOOL (tool),
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! pika_polygon_select_tool_is_closed (poly_sel),
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priv->operation_at_start);
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priv->changed = FALSE;
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}
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}
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static void
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pika_free_select_tool_button_release (PikaTool *tool,
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const PikaCoords *coords,
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guint32 time,
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GdkModifierType state,
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PikaButtonReleaseType release_type,
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PikaDisplay *display)
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{
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PikaFreeSelectTool *free_sel = PIKA_FREE_SELECT_TOOL (tool);
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PikaPolygonSelectTool *poly_sel = PIKA_POLYGON_SELECT_TOOL (tool);
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PikaFreeSelectToolPrivate *priv = free_sel->priv;
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if (pika_polygon_select_tool_is_grabbed (poly_sel))
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{
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pika_selection_tool_end_change (PIKA_SELECTION_TOOL (tool),
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! priv->changed);
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priv->changed = FALSE;
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}
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PIKA_TOOL_CLASS (parent_class)->button_release (tool, coords, time, state,
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release_type, display);
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}
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static void
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pika_free_select_tool_options_notify (PikaTool *tool,
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PikaToolOptions *options,
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const GParamSpec *pspec)
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{
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if (! strcmp (pspec->name, "antialias") ||
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! strcmp (pspec->name, "feather") ||
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! strcmp (pspec->name, "feather-radius"))
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{
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if (tool->display)
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{
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pika_free_select_tool_change_complete (
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PIKA_POLYGON_SELECT_TOOL (tool), tool->display);
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}
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}
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PIKA_TOOL_CLASS (parent_class)->options_notify (tool, options, pspec);
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}
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static gboolean
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pika_free_select_tool_have_selection (PikaSelectionTool *sel_tool,
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PikaDisplay *display)
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{
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PikaPolygonSelectTool *poly_sel = PIKA_POLYGON_SELECT_TOOL (sel_tool);
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PikaTool *tool = PIKA_TOOL (sel_tool);
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if (display == tool->display)
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{
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gint n_points;
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pika_polygon_select_tool_get_points (poly_sel, NULL, &n_points);
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if (n_points > 2)
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return TRUE;
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}
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return PIKA_SELECTION_TOOL_CLASS (parent_class)->have_selection (sel_tool,
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display);
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}
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static void
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pika_free_select_tool_change_complete (PikaPolygonSelectTool *poly_sel,
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PikaDisplay *display)
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{
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PikaFreeSelectTool *free_sel = PIKA_FREE_SELECT_TOOL (poly_sel);
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PikaFreeSelectToolPrivate *priv = free_sel->priv;
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priv->changed = TRUE;
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pika_selection_tool_start_change (PIKA_SELECTION_TOOL (free_sel),
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FALSE,
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priv->operation_at_start);
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if (pika_polygon_select_tool_is_closed (poly_sel))
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pika_free_select_tool_select (free_sel, display);
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pika_selection_tool_end_change (PIKA_SELECTION_TOOL (free_sel),
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FALSE);
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}
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static void
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pika_free_select_tool_halt (PikaFreeSelectTool *free_sel)
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{
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PikaFreeSelectToolPrivate *priv = free_sel->priv;
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priv->started = FALSE;
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}
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static void
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pika_free_select_tool_commit (PikaFreeSelectTool *free_sel,
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PikaDisplay *display)
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{
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PikaPolygonSelectTool *poly_sel = PIKA_POLYGON_SELECT_TOOL (free_sel);
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if (! pika_polygon_select_tool_is_closed (poly_sel))
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{
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if (pika_free_select_tool_select (free_sel, display))
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pika_image_flush (pika_display_get_image (display));
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}
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}
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static gboolean
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pika_free_select_tool_select (PikaFreeSelectTool *free_sel,
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PikaDisplay *display)
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{
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PikaSelectionOptions *options = PIKA_SELECTION_TOOL_GET_OPTIONS (free_sel);
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PikaTool *tool = PIKA_TOOL (free_sel);
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PikaFreeSelectToolPrivate *priv = free_sel->priv;
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PikaImage *image = pika_display_get_image (display);
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const PikaVector2 *points;
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gint n_points;
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pika_polygon_select_tool_get_points (PIKA_POLYGON_SELECT_TOOL (free_sel),
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&points, &n_points);
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if (n_points > 2)
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{
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/* prevent this change from halting the tool */
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pika_tool_control_push_preserve (tool->control, TRUE);
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pika_channel_select_polygon (pika_image_get_mask (image),
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C_("command", "Free Select"),
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n_points,
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points,
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priv->operation_at_start,
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options->antialias,
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options->feather,
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options->feather_radius,
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options->feather_radius,
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TRUE);
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pika_tool_control_pop_preserve (tool->control);
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return TRUE;
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}
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return FALSE;
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}
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