PIKApp/app/tools/pikapolygonselecttool.c

560 lines
21 KiB
C

/* PIKA - Photo and Image Kooker Application
* a rebranding of The GNU Image Manipulation Program (created with heckimp)
* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
*
* Original copyright, applying to most contents (license remains unchanged):
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* Major improvement to support polygonal segments
* Copyright (C) 2008 Martin Nordholts
*
* This program is polygon software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Polygon 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 "libpikawidgets/pikawidgets.h"
#include "tools-types.h"
#include "core/pikachannel.h"
#include "core/pikachannel-select.h"
#include "core/pikaimage.h"
#include "core/pikalayer-floating-selection.h"
#include "widgets/pikahelp-ids.h"
#include "widgets/pikawidgets-utils.h"
#include "display/pikadisplay.h"
#include "display/pikatoolpolygon.h"
#include "pikapolygonselecttool.h"
#include "pikaselectionoptions.h"
#include "pikatoolcontrol.h"
struct _PikaPolygonSelectToolPrivate
{
PikaToolWidget *widget;
PikaToolWidget *grab_widget;
gboolean pending_response;
gint pending_response_id;
};
/* local function prototypes */
static void pika_polygon_select_tool_finalize (GObject *object);
static void pika_polygon_select_tool_control (PikaTool *tool,
PikaToolAction action,
PikaDisplay *display);
static void pika_polygon_select_tool_button_press (PikaTool *tool,
const PikaCoords *coords,
guint32 time,
GdkModifierType state,
PikaButtonPressType press_type,
PikaDisplay *display);
static void pika_polygon_select_tool_button_release (PikaTool *tool,
const PikaCoords *coords,
guint32 time,
GdkModifierType state,
PikaButtonReleaseType release_type,
PikaDisplay *display);
static void pika_polygon_select_tool_motion (PikaTool *tool,
const PikaCoords *coords,
guint32 time,
GdkModifierType state,
PikaDisplay *display);
static gboolean pika_polygon_select_tool_key_press (PikaTool *tool,
GdkEventKey *kevent,
PikaDisplay *display);
static void pika_polygon_select_tool_modifier_key (PikaTool *tool,
GdkModifierType key,
gboolean press,
GdkModifierType state,
PikaDisplay *display);
static void pika_polygon_select_tool_oper_update (PikaTool *tool,
const PikaCoords *coords,
GdkModifierType state,
gboolean proximity,
PikaDisplay *display);
static void pika_polygon_select_tool_cursor_update (PikaTool *tool,
const PikaCoords *coords,
GdkModifierType state,
PikaDisplay *display);
static void pika_polygon_select_tool_real_confirm (PikaPolygonSelectTool *poly_sel,
PikaDisplay *display);
static void pika_polygon_select_tool_polygon_change_complete (PikaToolWidget *polygon,
PikaPolygonSelectTool *poly_sel);
static void pika_polygon_select_tool_polygon_response (PikaToolWidget *polygon,
gint response_id,
PikaPolygonSelectTool *poly_sel);
static void pika_polygon_select_tool_start (PikaPolygonSelectTool *poly_sel,
PikaDisplay *display);
G_DEFINE_TYPE_WITH_PRIVATE (PikaPolygonSelectTool, pika_polygon_select_tool,
PIKA_TYPE_SELECTION_TOOL)
#define parent_class pika_polygon_select_tool_parent_class
/* private functions */
static void
pika_polygon_select_tool_class_init (PikaPolygonSelectToolClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
PikaToolClass *tool_class = PIKA_TOOL_CLASS (klass);
object_class->finalize = pika_polygon_select_tool_finalize;
tool_class->control = pika_polygon_select_tool_control;
tool_class->button_press = pika_polygon_select_tool_button_press;
tool_class->button_release = pika_polygon_select_tool_button_release;
tool_class->motion = pika_polygon_select_tool_motion;
tool_class->key_press = pika_polygon_select_tool_key_press;
tool_class->modifier_key = pika_polygon_select_tool_modifier_key;
tool_class->oper_update = pika_polygon_select_tool_oper_update;
tool_class->cursor_update = pika_polygon_select_tool_cursor_update;
klass->change_complete = NULL;
klass->confirm = pika_polygon_select_tool_real_confirm;
}
static void
pika_polygon_select_tool_init (PikaPolygonSelectTool *poly_sel)
{
PikaTool *tool = PIKA_TOOL (poly_sel);
PikaSelectionTool *sel_tool = PIKA_SELECTION_TOOL (tool);
poly_sel->priv = pika_polygon_select_tool_get_instance_private (poly_sel);
pika_tool_control_set_motion_mode (tool->control,
PIKA_MOTION_MODE_EXACT);
pika_tool_control_set_wants_click (tool->control, TRUE);
pika_tool_control_set_wants_double_click (tool->control, TRUE);
pika_tool_control_set_active_modifiers (tool->control,
PIKA_TOOL_ACTIVE_MODIFIERS_SEPARATE);
pika_tool_control_set_precision (tool->control,
PIKA_CURSOR_PRECISION_SUBPIXEL);
sel_tool->allow_move = FALSE;
}
static void
pika_polygon_select_tool_finalize (GObject *object)
{
PikaPolygonSelectTool *poly_sel = PIKA_POLYGON_SELECT_TOOL (object);
PikaPolygonSelectToolPrivate *priv = poly_sel->priv;
g_clear_object (&priv->widget);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
pika_polygon_select_tool_control (PikaTool *tool,
PikaToolAction action,
PikaDisplay *display)
{
PikaPolygonSelectTool *poly_sel = PIKA_POLYGON_SELECT_TOOL (tool);
switch (action)
{
case PIKA_TOOL_ACTION_PAUSE:
case PIKA_TOOL_ACTION_RESUME:
break;
case PIKA_TOOL_ACTION_HALT:
pika_polygon_select_tool_halt (poly_sel);
break;
case PIKA_TOOL_ACTION_COMMIT:
break;
}
PIKA_TOOL_CLASS (parent_class)->control (tool, action, display);
}
static void
pika_polygon_select_tool_button_press (PikaTool *tool,
const PikaCoords *coords,
guint32 time,
GdkModifierType state,
PikaButtonPressType press_type,
PikaDisplay *display)
{
PikaPolygonSelectTool *poly_sel = PIKA_POLYGON_SELECT_TOOL (tool);
PikaPolygonSelectToolPrivate *priv = poly_sel->priv;
if (tool->display && tool->display != display)
pika_tool_control (tool, PIKA_TOOL_ACTION_COMMIT, tool->display);
if (! priv->widget) /* not tool->display, we have a subclass */
{
/* First of all handle delegation to the selection mask edit logic
* if appropriate.
*/
if (pika_selection_tool_start_edit (PIKA_SELECTION_TOOL (poly_sel),
display, coords))
{
return;
}
pika_polygon_select_tool_start (poly_sel, display);
pika_tool_widget_hover (priv->widget, coords, state, TRUE);
}
if (pika_tool_widget_button_press (priv->widget, coords, time, state,
press_type))
{
priv->grab_widget = priv->widget;
}
if (press_type == PIKA_BUTTON_PRESS_NORMAL)
pika_tool_control_activate (tool->control);
}
static void
pika_polygon_select_tool_button_release (PikaTool *tool,
const PikaCoords *coords,
guint32 time,
GdkModifierType state,
PikaButtonReleaseType release_type,
PikaDisplay *display)
{
PikaPolygonSelectTool *poly_sel = PIKA_POLYGON_SELECT_TOOL (tool);
PikaPolygonSelectToolPrivate *priv = poly_sel->priv;
PikaImage *image = pika_display_get_image (display);
pika_tool_control_halt (tool->control);
switch (release_type)
{
case PIKA_BUTTON_RELEASE_CLICK:
case PIKA_BUTTON_RELEASE_NO_MOTION:
/* If there is a floating selection, anchor it */
if (pika_image_get_floating_selection (image))
{
floating_sel_anchor (pika_image_get_floating_selection (image));
pika_tool_control (tool, PIKA_TOOL_ACTION_HALT, display);
return;
}
/* fallthru */
default:
if (priv->grab_widget)
{
pika_tool_widget_button_release (priv->grab_widget,
coords, time, state, release_type);
priv->grab_widget = NULL;
}
}
if (priv->pending_response)
{
pika_polygon_select_tool_polygon_response (priv->widget,
priv->pending_response_id,
poly_sel);
priv->pending_response = FALSE;
}
}
static void
pika_polygon_select_tool_motion (PikaTool *tool,
const PikaCoords *coords,
guint32 time,
GdkModifierType state,
PikaDisplay *display)
{
PikaPolygonSelectTool *poly_sel = PIKA_POLYGON_SELECT_TOOL (tool);
PikaPolygonSelectToolPrivate *priv = poly_sel->priv;
if (priv->grab_widget)
{
pika_tool_widget_motion (priv->grab_widget, coords, time, state);
}
}
static gboolean
pika_polygon_select_tool_key_press (PikaTool *tool,
GdkEventKey *kevent,
PikaDisplay *display)
{
PikaPolygonSelectTool *poly_sel = PIKA_POLYGON_SELECT_TOOL (tool);
PikaPolygonSelectToolPrivate *priv = poly_sel->priv;
if (priv->widget && display == tool->display)
{
return pika_tool_widget_key_press (priv->widget, kevent);
}
return FALSE;
}
static void
pika_polygon_select_tool_modifier_key (PikaTool *tool,
GdkModifierType key,
gboolean press,
GdkModifierType state,
PikaDisplay *display)
{
PikaPolygonSelectTool *poly_sel = PIKA_POLYGON_SELECT_TOOL (tool);
PikaPolygonSelectToolPrivate *priv = poly_sel->priv;
if (priv->widget && display == tool->display)
{
pika_tool_widget_hover_modifier (priv->widget, key, press, state);
/* let PikaSelectTool handle alt+<mod> */
if (! (state & GDK_MOD1_MASK))
{
/* otherwise, shift/ctrl are handled by the widget */
state &= ~(pika_get_extend_selection_mask () |
pika_get_modify_selection_mask ());
}
}
PIKA_TOOL_CLASS (parent_class)->modifier_key (tool, key, press, state,
display);
}
static void
pika_polygon_select_tool_oper_update (PikaTool *tool,
const PikaCoords *coords,
GdkModifierType state,
gboolean proximity,
PikaDisplay *display)
{
PikaPolygonSelectTool *poly_sel = PIKA_POLYGON_SELECT_TOOL (tool);
PikaPolygonSelectToolPrivate *priv = poly_sel->priv;
if (priv->widget && display == tool->display)
{
pika_tool_widget_hover (priv->widget, coords, state, proximity);
/* let PikaSelectTool handle alt+<mod> */
if (! (state & GDK_MOD1_MASK))
{
/* otherwise, shift/ctrl are handled by the widget */
state &= ~(pika_get_extend_selection_mask () |
pika_get_modify_selection_mask ());
}
}
PIKA_TOOL_CLASS (parent_class)->oper_update (tool, coords, state, proximity,
display);
}
static void
pika_polygon_select_tool_cursor_update (PikaTool *tool,
const PikaCoords *coords,
GdkModifierType state,
PikaDisplay *display)
{
PikaPolygonSelectTool *poly_sel = PIKA_POLYGON_SELECT_TOOL (tool);
PikaPolygonSelectToolPrivate *priv = poly_sel->priv;
PikaCursorModifier modifier = PIKA_CURSOR_MODIFIER_NONE;
if (tool->display)
{
if (priv->widget && display == tool->display)
{
pika_tool_widget_get_cursor (priv->widget, coords, state,
NULL, NULL, &modifier);
/* let PikaSelectTool handle alt+<mod> */
if (! (state & GDK_MOD1_MASK))
{
/* otherwise, shift/ctrl are handled by the widget */
state &= ~(pika_get_extend_selection_mask () |
pika_get_modify_selection_mask ());
}
}
pika_tool_set_cursor (tool, display,
pika_tool_control_get_cursor (tool->control),
pika_tool_control_get_tool_cursor (tool->control),
modifier);
}
PIKA_TOOL_CLASS (parent_class)->cursor_update (tool, coords, state,
display);
}
static void
pika_polygon_select_tool_real_confirm (PikaPolygonSelectTool *poly_sel,
PikaDisplay *display)
{
pika_tool_control (PIKA_TOOL (poly_sel), PIKA_TOOL_ACTION_COMMIT, display);
}
static void
pika_polygon_select_tool_polygon_change_complete (PikaToolWidget *polygon,
PikaPolygonSelectTool *poly_sel)
{
if (PIKA_POLYGON_SELECT_TOOL_GET_CLASS (poly_sel)->change_complete)
{
PIKA_POLYGON_SELECT_TOOL_GET_CLASS (poly_sel)->change_complete (
poly_sel, PIKA_TOOL (poly_sel)->display);
}
}
static void
pika_polygon_select_tool_polygon_response (PikaToolWidget *polygon,
gint response_id,
PikaPolygonSelectTool *poly_sel)
{
PikaTool *tool = PIKA_TOOL (poly_sel);
PikaPolygonSelectToolPrivate *priv = poly_sel->priv;
/* if we're in the middle of a click, defer the response to the
* button_release() event
*/
if (pika_tool_control_is_active (tool->control))
{
priv->pending_response = TRUE;
priv->pending_response_id = response_id;
return;
}
switch (response_id)
{
case PIKA_TOOL_WIDGET_RESPONSE_CONFIRM:
/* don't pika_tool_control(COMMIT) here because we don't always
* want to HALT the tool after committing because we have a
* subclass, we do that in the default implementation of
* confirm().
*/
if (PIKA_POLYGON_SELECT_TOOL_GET_CLASS (poly_sel)->confirm)
{
PIKA_POLYGON_SELECT_TOOL_GET_CLASS (poly_sel)->confirm (
poly_sel, tool->display);
}
break;
case PIKA_TOOL_WIDGET_RESPONSE_CANCEL:
pika_tool_control (tool, PIKA_TOOL_ACTION_HALT, tool->display);
break;
}
}
static void
pika_polygon_select_tool_start (PikaPolygonSelectTool *poly_sel,
PikaDisplay *display)
{
PikaTool *tool = PIKA_TOOL (poly_sel);
PikaPolygonSelectToolPrivate *priv = poly_sel->priv;
PikaDisplayShell *shell = pika_display_get_shell (display);
tool->display = display;
priv->widget = pika_tool_polygon_new (shell);
pika_draw_tool_set_widget (PIKA_DRAW_TOOL (tool), priv->widget);
g_signal_connect (priv->widget, "change-complete",
G_CALLBACK (pika_polygon_select_tool_polygon_change_complete),
poly_sel);
g_signal_connect (priv->widget, "response",
G_CALLBACK (pika_polygon_select_tool_polygon_response),
poly_sel);
pika_draw_tool_start (PIKA_DRAW_TOOL (tool), display);
}
/* public functions */
gboolean
pika_polygon_select_tool_is_closed (PikaPolygonSelectTool *poly_sel)
{
PikaPolygonSelectToolPrivate *priv;
g_return_val_if_fail (PIKA_IS_POLYGON_SELECT_TOOL (poly_sel), FALSE);
priv = poly_sel->priv;
if (priv->widget)
return pika_tool_polygon_is_closed (PIKA_TOOL_POLYGON (priv->widget));
return FALSE;
}
void
pika_polygon_select_tool_get_points (PikaPolygonSelectTool *poly_sel,
const PikaVector2 **points,
gint *n_points)
{
PikaPolygonSelectToolPrivate *priv;
g_return_if_fail (PIKA_IS_POLYGON_SELECT_TOOL (poly_sel));
priv = poly_sel->priv;
if (priv->widget)
{
pika_tool_polygon_get_points (PIKA_TOOL_POLYGON (priv->widget),
points, n_points);
}
else
{
if (points) *points = NULL;
if (n_points) *n_points = 0;
}
}
/* protected functions */
gboolean
pika_polygon_select_tool_is_grabbed (PikaPolygonSelectTool *poly_sel)
{
PikaPolygonSelectToolPrivate *priv;
g_return_val_if_fail (PIKA_IS_POLYGON_SELECT_TOOL (poly_sel), FALSE);
priv = poly_sel->priv;
return priv->grab_widget != NULL;
}
void
pika_polygon_select_tool_halt (PikaPolygonSelectTool *poly_sel)
{
PikaPolygonSelectToolPrivate *priv;
g_return_if_fail (PIKA_IS_POLYGON_SELECT_TOOL (poly_sel));
priv = poly_sel->priv;
pika_draw_tool_set_widget (PIKA_DRAW_TOOL (poly_sel), NULL);
g_clear_object (&priv->widget);
}