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PIKApp/app/tools/pikadrawtool.c

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Initial checkin of Pika from heckimp
2023-09-26 00:35:21 +02:00
/* 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) 1995-2001 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 "libpikamath/pikamath.h"
#include "tools-types.h"
#include "core/pikaimage.h"
#include "core/pikapickable.h"
#include "display/pikacanvas.h"
#include "display/pikacanvasarc.h"
#include "display/pikacanvasboundary.h"
#include "display/pikacanvasgroup.h"
#include "display/pikacanvasguide.h"
#include "display/pikacanvashandle.h"
#include "display/pikacanvasitem-utils.h"
#include "display/pikacanvasline.h"
#include "display/pikacanvaspen.h"
#include "display/pikacanvaspolygon.h"
#include "display/pikacanvasrectangle.h"
#include "display/pikacanvassamplepoint.h"
#include "display/pikacanvastextcursor.h"
#include "display/pikacanvastransformpreview.h"
#include "display/pikacanvastext.h"
#include "display/pikadisplay.h"
#include "display/pikadisplayshell.h"
#include "display/pikadisplayshell-items.h"
#include "display/pikadisplayshell-transform.h"
#include "display/pikatoolwidget.h"
#include "pikadrawtool.h"
#include "pikatoolcontrol.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 pika_draw_tool_dispose (GObject *object);
static gboolean pika_draw_tool_has_display (PikaTool *tool,
PikaDisplay *display);
static PikaDisplay * pika_draw_tool_has_image (PikaTool *tool,
PikaImage *image);
static void pika_draw_tool_control (PikaTool *tool,
PikaToolAction action,
PikaDisplay *display);
static gboolean pika_draw_tool_key_press (PikaTool *tool,
GdkEventKey *kevent,
PikaDisplay *display);
static gboolean pika_draw_tool_key_release (PikaTool *tool,
GdkEventKey *kevent,
PikaDisplay *display);
static void pika_draw_tool_modifier_key (PikaTool *tool,
GdkModifierType key,
gboolean press,
GdkModifierType state,
PikaDisplay *display);
static void pika_draw_tool_active_modifier_key
(PikaTool *tool,
GdkModifierType key,
gboolean press,
GdkModifierType state,
PikaDisplay *display);
static void pika_draw_tool_oper_update (PikaTool *tool,
const PikaCoords *coords,
GdkModifierType state,
gboolean proximity,
PikaDisplay *display);
static void pika_draw_tool_cursor_update (PikaTool *tool,
const PikaCoords *coords,
GdkModifierType state,
PikaDisplay *display);
static PikaUIManager * pika_draw_tool_get_popup (PikaTool *tool,
const PikaCoords *coords,
GdkModifierType state,
PikaDisplay *display,
const gchar **ui_path);
static void pika_draw_tool_widget_status (PikaToolWidget *widget,
const gchar *status,
PikaTool *tool);
static void pika_draw_tool_widget_status_coords
(PikaToolWidget *widget,
const gchar *title,
gdouble x,
const gchar *separator,
gdouble y,
const gchar *help,
PikaTool *tool);
static void pika_draw_tool_widget_message
(PikaToolWidget *widget,
const gchar *message,
PikaTool *tool);
static void pika_draw_tool_widget_snap_offsets
(PikaToolWidget *widget,
gint offset_x,
gint offset_y,
gint width,
gint height,
PikaTool *tool);
static void pika_draw_tool_draw (PikaDrawTool *draw_tool);
static void pika_draw_tool_undraw (PikaDrawTool *draw_tool);
static void pika_draw_tool_real_draw (PikaDrawTool *draw_tool);
G_DEFINE_TYPE (PikaDrawTool, pika_draw_tool, PIKA_TYPE_TOOL)
#define parent_class pika_draw_tool_parent_class
static void
pika_draw_tool_class_init (PikaDrawToolClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
PikaToolClass *tool_class = PIKA_TOOL_CLASS (klass);
object_class->dispose = pika_draw_tool_dispose;
tool_class->has_display = pika_draw_tool_has_display;
tool_class->has_image = pika_draw_tool_has_image;
tool_class->control = pika_draw_tool_control;
tool_class->key_press = pika_draw_tool_key_press;
tool_class->key_release = pika_draw_tool_key_release;
tool_class->modifier_key = pika_draw_tool_modifier_key;
tool_class->active_modifier_key = pika_draw_tool_active_modifier_key;
tool_class->oper_update = pika_draw_tool_oper_update;
tool_class->cursor_update = pika_draw_tool_cursor_update;
tool_class->get_popup = pika_draw_tool_get_popup;
klass->draw = pika_draw_tool_real_draw;
}
static void
pika_draw_tool_init (PikaDrawTool *draw_tool)
{
draw_tool->display = NULL;
draw_tool->paused_count = 0;
draw_tool->preview = NULL;
draw_tool->item = NULL;
}
static void
pika_draw_tool_dispose (GObject *object)
{
PikaDrawTool *draw_tool = PIKA_DRAW_TOOL (object);
if (draw_tool->draw_timeout)
{
g_source_remove (draw_tool->draw_timeout);
draw_tool->draw_timeout = 0;
}
pika_draw_tool_set_widget (draw_tool, NULL);
pika_draw_tool_set_default_status (draw_tool, NULL);
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static gboolean
pika_draw_tool_has_display (PikaTool *tool,
PikaDisplay *display)
{
PikaDrawTool *draw_tool = PIKA_DRAW_TOOL (tool);
return (display == draw_tool->display ||
PIKA_TOOL_CLASS (parent_class)->has_display (tool, display));
}
static PikaDisplay *
pika_draw_tool_has_image (PikaTool *tool,
PikaImage *image)
{
PikaDrawTool *draw_tool = PIKA_DRAW_TOOL (tool);
PikaDisplay *display;
display = PIKA_TOOL_CLASS (parent_class)->has_image (tool, image);
if (! display && draw_tool->display)
{
if (image && pika_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
pika_draw_tool_control (PikaTool *tool,
PikaToolAction action,
PikaDisplay *display)
{
PikaDrawTool *draw_tool = PIKA_DRAW_TOOL (tool);
switch (action)
{
case PIKA_TOOL_ACTION_PAUSE:
case PIKA_TOOL_ACTION_RESUME:
break;
case PIKA_TOOL_ACTION_HALT:
if (pika_draw_tool_is_active (draw_tool))
pika_draw_tool_stop (draw_tool);
pika_draw_tool_set_widget (draw_tool, NULL);
break;
case PIKA_TOOL_ACTION_COMMIT:
break;
}
PIKA_TOOL_CLASS (parent_class)->control (tool, action, display);
}
static gboolean
pika_draw_tool_key_press (PikaTool *tool,
GdkEventKey *kevent,
PikaDisplay *display)
{
PikaDrawTool *draw_tool = PIKA_DRAW_TOOL (tool);
if (draw_tool->widget && display == draw_tool->display)
{
return pika_tool_widget_key_press (draw_tool->widget, kevent);
}
return PIKA_TOOL_CLASS (parent_class)->key_press (tool, kevent, display);
}
static gboolean
pika_draw_tool_key_release (PikaTool *tool,
GdkEventKey *kevent,
PikaDisplay *display)
{
PikaDrawTool *draw_tool = PIKA_DRAW_TOOL (tool);
if (draw_tool->widget && display == draw_tool->display)
{
return pika_tool_widget_key_release (draw_tool->widget, kevent);
}
return PIKA_TOOL_CLASS (parent_class)->key_release (tool, kevent, display);
}
static void
pika_draw_tool_modifier_key (PikaTool *tool,
GdkModifierType key,
gboolean press,
GdkModifierType state,
PikaDisplay *display)
{
PikaDrawTool *draw_tool = PIKA_DRAW_TOOL (tool);
if (draw_tool->widget && display == draw_tool->display)
{
pika_tool_widget_hover_modifier (draw_tool->widget, key, press, state);
}
PIKA_TOOL_CLASS (parent_class)->modifier_key (tool, key, press, state,
display);
}
static void
pika_draw_tool_active_modifier_key (PikaTool *tool,
GdkModifierType key,
gboolean press,
GdkModifierType state,
PikaDisplay *display)
{
PikaDrawTool *draw_tool = PIKA_DRAW_TOOL (tool);
if (draw_tool->widget && display == draw_tool->display)
{
pika_tool_widget_motion_modifier (draw_tool->widget, key, press, state);
}
PIKA_TOOL_CLASS (parent_class)->active_modifier_key (tool, key, press, state,
display);
}
static void
pika_draw_tool_oper_update (PikaTool *tool,
const PikaCoords *coords,
GdkModifierType state,
gboolean proximity,
PikaDisplay *display)
{
PikaDrawTool *draw_tool = PIKA_DRAW_TOOL (tool);
if (draw_tool->widget && display == draw_tool->display)
{
pika_tool_widget_hover (draw_tool->widget, coords, state, proximity);
}
else if (proximity && draw_tool->default_status)
{
pika_tool_replace_status (tool, display, "%s", draw_tool->default_status);
}
else if (! proximity)
{
pika_tool_pop_status (tool, display);
}
else
{
PIKA_TOOL_CLASS (parent_class)->oper_update (tool, coords, state,
proximity, display);
}
}
static void
pika_draw_tool_cursor_update (PikaTool *tool,
const PikaCoords *coords,
GdkModifierType state,
PikaDisplay *display)
{
PikaDrawTool *draw_tool = PIKA_DRAW_TOOL (tool);
if (draw_tool->widget && display == draw_tool->display)
{
PikaCursorType cursor;
PikaToolCursorType tool_cursor;
PikaCursorModifier modifier;
cursor = pika_tool_control_get_cursor (tool->control);
tool_cursor = pika_tool_control_get_tool_cursor (tool->control);
modifier = pika_tool_control_get_cursor_modifier (tool->control);
if (pika_tool_widget_get_cursor (draw_tool->widget, coords, state,
&cursor, &tool_cursor, &modifier))
{
pika_tool_set_cursor (tool, display,
cursor, tool_cursor, modifier);
return;
}
}
PIKA_TOOL_CLASS (parent_class)->cursor_update (tool, coords, state,
display);
}
static PikaUIManager *
pika_draw_tool_get_popup (PikaTool *tool,
const PikaCoords *coords,
GdkModifierType state,
PikaDisplay *display,
const gchar **ui_path)
{
PikaDrawTool *draw_tool = PIKA_DRAW_TOOL (tool);
if (draw_tool->widget && display == draw_tool->display)
{
PikaUIManager *ui_manager;
ui_manager = pika_tool_widget_get_popup (draw_tool->widget,
coords, state,
ui_path);
if (ui_manager)
return ui_manager;
}
return PIKA_TOOL_CLASS (parent_class)->get_popup (tool,
coords, state, display,
ui_path);
}
static void
pika_draw_tool_widget_status (PikaToolWidget *widget,
const gchar *status,
PikaTool *tool)
{
PikaDrawTool *draw_tool = PIKA_DRAW_TOOL (tool);
if (pika_draw_tool_is_active (draw_tool))
{
if (status)
pika_tool_replace_status (tool, draw_tool->display, "%s", status);
else
pika_tool_pop_status (tool, draw_tool->display);
}
}
static void
pika_draw_tool_widget_status_coords (PikaToolWidget *widget,
const gchar *title,
gdouble x,
const gchar *separator,
gdouble y,
const gchar *help,
PikaTool *tool)
{
PikaDrawTool *draw_tool = PIKA_DRAW_TOOL (tool);
if (pika_draw_tool_is_active (draw_tool))
{
pika_tool_pop_status (tool, draw_tool->display);
pika_tool_push_status_coords (tool, draw_tool->display,
pika_tool_control_get_precision (
tool->control),
title, x, separator, y, help);
}
}
static void
pika_draw_tool_widget_message (PikaToolWidget *widget,
const gchar *message,
PikaTool *tool)
{
PikaDrawTool *draw_tool = PIKA_DRAW_TOOL (tool);
if (pika_draw_tool_is_active (draw_tool))
pika_tool_message_literal (tool, draw_tool->display, message);
}
static void
pika_draw_tool_widget_snap_offsets (PikaToolWidget *widget,
gint offset_x,
gint offset_y,
gint width,
gint height,
PikaTool *tool)
{
pika_tool_control_set_snap_offsets (tool->control,
offset_x, offset_y,
width, height);
}
#ifdef USE_TIMEOUT
static gboolean
pika_draw_tool_draw_timeout (PikaDrawTool *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;
pika_draw_tool_draw (draw_tool);
return FALSE;
}
#endif
static void
pika_draw_tool_draw (PikaDrawTool *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))
{
PikaDisplayShell *shell = pika_display_get_shell (draw_tool->display);
if (draw_tool->draw_timeout)
{
g_source_remove (draw_tool->draw_timeout);
draw_tool->draw_timeout = 0;
}
pika_draw_tool_undraw (draw_tool);
PIKA_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 "
"PikaDrawTool::draw() of %s",
G_STRFUNC,
g_type_name (G_TYPE_FROM_INSTANCE (draw_tool)));
while (draw_tool->group_stack)
pika_draw_tool_pop_group (draw_tool);
}
if (draw_tool->preview)
pika_display_shell_add_preview_item (shell, draw_tool->preview);
if (draw_tool->item)
pika_display_shell_add_tool_item (shell, draw_tool->item);
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
pika_draw_tool_undraw (PikaDrawTool *draw_tool)
{
if (draw_tool->display)
{
PikaDisplayShell *shell = pika_display_get_shell (draw_tool->display);
if (draw_tool->preview)
{
pika_display_shell_remove_preview_item (shell, draw_tool->preview);
g_clear_object (&draw_tool->preview);
}
if (draw_tool->item)
{
pika_display_shell_remove_tool_item (shell, draw_tool->item);
g_clear_object (&draw_tool->item);
}
}
}
static void
pika_draw_tool_real_draw (PikaDrawTool *draw_tool)
{
if (draw_tool->widget)
{
PikaCanvasItem *item = pika_tool_widget_get_item (draw_tool->widget);
pika_draw_tool_add_item (draw_tool, item);
}
}
void
pika_draw_tool_start (PikaDrawTool *draw_tool,
PikaDisplay *display)
{
g_return_if_fail (PIKA_IS_DRAW_TOOL (draw_tool));
g_return_if_fail (PIKA_IS_DISPLAY (display));
g_return_if_fail (pika_draw_tool_is_active (draw_tool) == FALSE);
draw_tool->display = display;
pika_draw_tool_draw (draw_tool);
}
void
pika_draw_tool_stop (PikaDrawTool *draw_tool)
{
g_return_if_fail (PIKA_IS_DRAW_TOOL (draw_tool));
g_return_if_fail (pika_draw_tool_is_active (draw_tool) == TRUE);
pika_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
pika_draw_tool_is_active (PikaDrawTool *draw_tool)
{
g_return_val_if_fail (PIKA_IS_DRAW_TOOL (draw_tool), FALSE);
return draw_tool->display != NULL;
}
void
pika_draw_tool_pause (PikaDrawTool *draw_tool)
{
g_return_if_fail (PIKA_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
pika_draw_tool_resume (PikaDrawTool *draw_tool)
{
g_return_if_fail (PIKA_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 (pika_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) pika_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
*/
pika_draw_tool_draw (draw_tool);
}
}
/**
* pika_draw_tool_calc_distance:
* @draw_tool: a #PikaDrawTool
* @display: a #PikaDisplay
* @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
* pika_draw_tool_calc_distance_square() instead.
*
* Returns: the distance between the given points in display coordinates
**/
gdouble
pika_draw_tool_calc_distance (PikaDrawTool *draw_tool,
PikaDisplay *display,
gdouble x1,
gdouble y1,
gdouble x2,
gdouble y2)
{
return sqrt (pika_draw_tool_calc_distance_square (draw_tool, display,
x1, y1, x2, y2));
}
/**
* pika_draw_tool_calc_distance_square:
* @draw_tool: a #PikaDrawTool
* @display: a #PikaDisplay
* @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 pika_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
pika_draw_tool_calc_distance_square (PikaDrawTool *draw_tool,
PikaDisplay *display,
gdouble x1,
gdouble y1,
gdouble x2,
gdouble y2)
{
PikaDisplayShell *shell;
gdouble tx1, ty1;
gdouble tx2, ty2;
g_return_val_if_fail (PIKA_IS_DRAW_TOOL (draw_tool), 0.0);
g_return_val_if_fail (PIKA_IS_DISPLAY (display), 0.0);
shell = pika_display_get_shell (display);
pika_display_shell_transform_xy_f (shell, x1, y1, &tx1, &ty1);
pika_display_shell_transform_xy_f (shell, x2, y2, &tx2, &ty2);
return SQR (tx2 - tx1) + SQR (ty2 - ty1);
}
void
pika_draw_tool_set_widget (PikaDrawTool *draw_tool,
PikaToolWidget *widget)
{
g_return_if_fail (PIKA_IS_DRAW_TOOL (draw_tool));
g_return_if_fail (widget == NULL || PIKA_IS_TOOL_WIDGET (widget));
if (widget == draw_tool->widget)
return;
if (draw_tool->widget)
{
pika_tool_widget_set_focus (draw_tool->widget, FALSE);
g_signal_handlers_disconnect_by_func (draw_tool->widget,
pika_draw_tool_widget_status,
draw_tool);
g_signal_handlers_disconnect_by_func (draw_tool->widget,
pika_draw_tool_widget_status_coords,
draw_tool);
g_signal_handlers_disconnect_by_func (draw_tool->widget,
pika_draw_tool_widget_message,
draw_tool);
g_signal_handlers_disconnect_by_func (draw_tool->widget,
pika_draw_tool_widget_snap_offsets,
draw_tool);
if (pika_draw_tool_is_active (draw_tool))
{
PikaCanvasItem *item = pika_tool_widget_get_item (draw_tool->widget);
pika_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 (pika_draw_tool_is_active (draw_tool))
{
PikaCanvasItem *item = pika_tool_widget_get_item (draw_tool->widget);
pika_draw_tool_add_item (draw_tool, item);
}
g_signal_connect (draw_tool->widget, "status",
G_CALLBACK (pika_draw_tool_widget_status),
draw_tool);
g_signal_connect (draw_tool->widget, "status-coords",
G_CALLBACK (pika_draw_tool_widget_status_coords),
draw_tool);
g_signal_connect (draw_tool->widget, "message",
G_CALLBACK (pika_draw_tool_widget_message),
draw_tool);
g_signal_connect (draw_tool->widget, "snap-offsets",
G_CALLBACK (pika_draw_tool_widget_snap_offsets),
draw_tool);
pika_tool_widget_set_focus (draw_tool->widget, TRUE);
}
}
void
pika_draw_tool_set_default_status (PikaDrawTool *draw_tool,
const gchar *status)
{
g_return_if_fail (PIKA_IS_DRAW_TOOL (draw_tool));
if (draw_tool->default_status)
g_free (draw_tool->default_status);
draw_tool->default_status = g_strdup (status);
}
void
pika_draw_tool_add_preview (PikaDrawTool *draw_tool,
PikaCanvasItem *item)
{
g_return_if_fail (PIKA_IS_DRAW_TOOL (draw_tool));
g_return_if_fail (PIKA_IS_CANVAS_ITEM (item));
if (! draw_tool->preview)
draw_tool->preview =
pika_canvas_group_new (pika_display_get_shell (draw_tool->display));
pika_canvas_group_add_item (PIKA_CANVAS_GROUP (draw_tool->preview), item);
}
void
pika_draw_tool_remove_preview (PikaDrawTool *draw_tool,
PikaCanvasItem *item)
{
g_return_if_fail (PIKA_IS_DRAW_TOOL (draw_tool));
g_return_if_fail (PIKA_IS_CANVAS_ITEM (item));
g_return_if_fail (draw_tool->preview != NULL);
pika_canvas_group_remove_item (PIKA_CANVAS_GROUP (draw_tool->preview), item);
}
void
pika_draw_tool_add_item (PikaDrawTool *draw_tool,
PikaCanvasItem *item)
{
PikaCanvasGroup *group;
g_return_if_fail (PIKA_IS_DRAW_TOOL (draw_tool));
g_return_if_fail (PIKA_IS_CANVAS_ITEM (item));
if (! draw_tool->item)
draw_tool->item =
pika_canvas_group_new (pika_display_get_shell (draw_tool->display));
group = PIKA_CANVAS_GROUP (draw_tool->item);
if (draw_tool->group_stack)
group = draw_tool->group_stack->data;
pika_canvas_group_add_item (group, item);
}
void
pika_draw_tool_remove_item (PikaDrawTool *draw_tool,
PikaCanvasItem *item)
{
g_return_if_fail (PIKA_IS_DRAW_TOOL (draw_tool));
g_return_if_fail (PIKA_IS_CANVAS_ITEM (item));
g_return_if_fail (draw_tool->item != NULL);
pika_canvas_group_remove_item (PIKA_CANVAS_GROUP (draw_tool->item), item);
}
PikaCanvasGroup *
pika_draw_tool_add_stroke_group (PikaDrawTool *draw_tool)
{
PikaCanvasItem *item;
g_return_val_if_fail (PIKA_IS_DRAW_TOOL (draw_tool), NULL);
item = pika_canvas_group_new (pika_display_get_shell (draw_tool->display));
pika_canvas_group_set_group_stroking (PIKA_CANVAS_GROUP (item), TRUE);
pika_draw_tool_add_item (draw_tool, item);
g_object_unref (item);
return PIKA_CANVAS_GROUP (item);
}
PikaCanvasGroup *
pika_draw_tool_add_fill_group (PikaDrawTool *draw_tool)
{
PikaCanvasItem *item;
g_return_val_if_fail (PIKA_IS_DRAW_TOOL (draw_tool), NULL);
item = pika_canvas_group_new (pika_display_get_shell (draw_tool->display));
pika_canvas_group_set_group_filling (PIKA_CANVAS_GROUP (item), TRUE);
pika_draw_tool_add_item (draw_tool, item);
g_object_unref (item);
return PIKA_CANVAS_GROUP (item);
}
void
pika_draw_tool_push_group (PikaDrawTool *draw_tool,
PikaCanvasGroup *group)
{
g_return_if_fail (PIKA_IS_DRAW_TOOL (draw_tool));
g_return_if_fail (PIKA_IS_CANVAS_GROUP (group));
draw_tool->group_stack = g_list_prepend (draw_tool->group_stack, group);
}
void
pika_draw_tool_pop_group (PikaDrawTool *draw_tool)
{
g_return_if_fail (PIKA_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);
}
/**
* pika_draw_tool_add_line:
* @draw_tool: the #PikaDrawTool
* @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
* coordinates.
**/
PikaCanvasItem *
pika_draw_tool_add_line (PikaDrawTool *draw_tool,
gdouble x1,
gdouble y1,
gdouble x2,
gdouble y2)
{
PikaCanvasItem *item;
g_return_val_if_fail (PIKA_IS_DRAW_TOOL (draw_tool), NULL);
item = pika_canvas_line_new (pika_display_get_shell (draw_tool->display),
x1, y1, x2, y2);
pika_draw_tool_add_item (draw_tool, item);
g_object_unref (item);
return item;
}
/**
* pika_draw_tool_add_guide:
* @draw_tool: the #PikaDrawTool
* @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.
**/
PikaCanvasItem *
pika_draw_tool_add_guide (PikaDrawTool *draw_tool,
PikaOrientationType orientation,
gint position,
PikaGuideStyle style)
{
PikaCanvasItem *item;
g_return_val_if_fail (PIKA_IS_DRAW_TOOL (draw_tool), NULL);
item = pika_canvas_guide_new (pika_display_get_shell (draw_tool->display),
orientation, position,
style);
pika_draw_tool_add_item (draw_tool, item);
g_object_unref (item);
return item;
}
/**
* pika_draw_tool_add_crosshair:
* @draw_tool: the #PikaDrawTool
* @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.
**/
PikaCanvasItem *
pika_draw_tool_add_crosshair (PikaDrawTool *draw_tool,
gint position_x,
gint position_y)
{
PikaCanvasGroup *group;
group = pika_draw_tool_add_stroke_group (draw_tool);
pika_draw_tool_push_group (draw_tool, group);
pika_draw_tool_add_guide (draw_tool,
PIKA_ORIENTATION_VERTICAL, position_x,
PIKA_GUIDE_STYLE_NONE);
pika_draw_tool_add_guide (draw_tool,
PIKA_ORIENTATION_HORIZONTAL, position_y,
PIKA_GUIDE_STYLE_NONE);
pika_draw_tool_pop_group (draw_tool);
return PIKA_CANVAS_ITEM (group);
}
/**
* pika_draw_tool_add_sample_point:
* @draw_tool: the #PikaDrawTool
* @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
**/
PikaCanvasItem *
pika_draw_tool_add_sample_point (PikaDrawTool *draw_tool,
gint x,
gint y,
gint index)
{
PikaCanvasItem *item;
g_return_val_if_fail (PIKA_IS_DRAW_TOOL (draw_tool), NULL);
item = pika_canvas_sample_point_new (pika_display_get_shell (draw_tool->display),
x, y, index, TRUE);
pika_draw_tool_add_item (draw_tool, item);
g_object_unref (item);
return item;
}
/**
* pika_draw_tool_add_rectangle:
* @draw_tool: the #PikaDrawTool
* @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.
**/
PikaCanvasItem *
pika_draw_tool_add_rectangle (PikaDrawTool *draw_tool,
gboolean filled,
gdouble x,
gdouble y,
gdouble width,
gdouble height)
{
PikaCanvasItem *item;
g_return_val_if_fail (PIKA_IS_DRAW_TOOL (draw_tool), NULL);
item = pika_canvas_rectangle_new (pika_display_get_shell (draw_tool->display),
x, y, width, height, filled);
pika_draw_tool_add_item (draw_tool, item);
g_object_unref (item);
return item;
}
PikaCanvasItem *
pika_draw_tool_add_arc (PikaDrawTool *draw_tool,
gboolean filled,
gdouble x,
gdouble y,
gdouble width,
gdouble height,
gdouble start_angle,
gdouble slice_angle)
{
PikaCanvasItem *item;
g_return_val_if_fail (PIKA_IS_DRAW_TOOL (draw_tool), NULL);
item = pika_canvas_arc_new (pika_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);
pika_draw_tool_add_item (draw_tool, item);
g_object_unref (item);
return item;
}
PikaCanvasItem *
pika_draw_tool_add_handle (PikaDrawTool *draw_tool,
PikaHandleType type,
gdouble x,
gdouble y,
gint width,
gint height,
PikaHandleAnchor anchor)
{
PikaCanvasItem *item;
g_return_val_if_fail (PIKA_IS_DRAW_TOOL (draw_tool), NULL);
item = pika_canvas_handle_new (pika_display_get_shell (draw_tool->display),
type, anchor, x, y, width, height);
pika_draw_tool_add_item (draw_tool, item);
g_object_unref (item);
return item;
}
PikaCanvasItem *
pika_draw_tool_add_lines (PikaDrawTool *draw_tool,
const PikaVector2 *points,
gint n_points,
PikaMatrix3 *transform,
gboolean filled)
{
PikaCanvasItem *item;
g_return_val_if_fail (PIKA_IS_DRAW_TOOL (draw_tool), NULL);
if (points == NULL || n_points < 2)
return NULL;
item = pika_canvas_polygon_new (pika_display_get_shell (draw_tool->display),
points, n_points, transform, filled);
pika_draw_tool_add_item (draw_tool, item);
g_object_unref (item);
return item;
}
PikaCanvasItem *
pika_draw_tool_add_strokes (PikaDrawTool *draw_tool,
const PikaCoords *points,
gint n_points,
PikaMatrix3 *transform,
gboolean filled)
{
PikaCanvasItem *item;
g_return_val_if_fail (PIKA_IS_DRAW_TOOL (draw_tool), NULL);
if (points == NULL || n_points < 2)
return NULL;
item = pika_canvas_polygon_new_from_coords (pika_display_get_shell (draw_tool->display),
points, n_points, transform, filled);
pika_draw_tool_add_item (draw_tool, item);
g_object_unref (item);
return item;
}
PikaCanvasItem *
pika_draw_tool_add_pen (PikaDrawTool *draw_tool,
const PikaVector2 *points,
gint n_points,
PikaContext *context,
PikaActiveColor color,
gint width)
{
PikaCanvasItem *item;
g_return_val_if_fail (PIKA_IS_DRAW_TOOL (draw_tool), NULL);
if (points == NULL || n_points < 2)
return NULL;
item = pika_canvas_pen_new (pika_display_get_shell (draw_tool->display),
points, n_points, context, color, width);
pika_draw_tool_add_item (draw_tool, item);
g_object_unref (item);
return item;
}
/**
* pika_draw_tool_add_boundary:
* @draw_tool: a #PikaDrawTool
* @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) .
*/
PikaCanvasItem *
pika_draw_tool_add_boundary (PikaDrawTool *draw_tool,
const PikaBoundSeg *bound_segs,
gint n_bound_segs,
PikaMatrix3 *transform,
gdouble offset_x,
gdouble offset_y)
{
PikaCanvasItem *item;
g_return_val_if_fail (PIKA_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 = pika_canvas_boundary_new (pika_display_get_shell (draw_tool->display),
bound_segs, n_bound_segs,
transform,
offset_x, offset_y);
pika_draw_tool_add_item (draw_tool, item);
g_object_unref (item);
return item;
}
PikaCanvasItem *
pika_draw_tool_add_text_cursor (PikaDrawTool *draw_tool,
PangoRectangle *cursor,
gboolean overwrite,
PikaTextDirection direction)
{
PikaCanvasItem *item;
g_return_val_if_fail (PIKA_IS_DRAW_TOOL (draw_tool), NULL);
item = pika_canvas_text_cursor_new (pika_display_get_shell (draw_tool->display),
cursor, overwrite, direction);
pika_draw_tool_add_item (draw_tool, item);
g_object_unref (item);
return item;
}
PikaCanvasItem *
pika_draw_tool_add_transform_preview (PikaDrawTool *draw_tool,
PikaPickable *pickable,
const PikaMatrix3 *transform,
gdouble x1,
gdouble y1,
gdouble x2,
gdouble y2)
{
PikaCanvasItem *item;
g_return_val_if_fail (PIKA_IS_DRAW_TOOL (draw_tool), NULL);
g_return_val_if_fail (PIKA_IS_PICKABLE (pickable), NULL);
g_return_val_if_fail (transform != NULL, NULL);
item = pika_canvas_transform_preview_new (pika_display_get_shell (draw_tool->display),
pickable, transform,
x1, y1, x2, y2);
pika_draw_tool_add_preview (draw_tool, item);
g_object_unref (item);
return item;
}
PikaCanvasItem *
pika_draw_tool_add_text (PikaDrawTool *draw_tool,
gdouble x,
gdouble y,
gdouble font_size,
gchar *text)
{
PikaCanvasItem *item;
g_return_val_if_fail (PIKA_IS_DRAW_TOOL (draw_tool), NULL);
item = pika_canvas_text_new (pika_display_get_shell (draw_tool->display),
x, y, font_size, text);
pika_draw_tool_add_item (draw_tool, item);
g_object_unref (item);
return item;
}
gboolean
pika_draw_tool_on_handle (PikaDrawTool *draw_tool,
PikaDisplay *display,
gdouble x,
gdouble y,
PikaHandleType type,
gdouble handle_x,
gdouble handle_y,
gint width,
gint height,
PikaHandleAnchor anchor)
{
PikaDisplayShell *shell;
gdouble tx, ty;
gdouble handle_tx, handle_ty;
g_return_val_if_fail (PIKA_IS_DRAW_TOOL (draw_tool), FALSE);
g_return_val_if_fail (PIKA_IS_DISPLAY (display), FALSE);
shell = pika_display_get_shell (display);
pika_display_shell_zoom_xy_f (shell,
x, y,
&tx, &ty);
pika_display_shell_zoom_xy_f (shell,
handle_x, handle_y,
&handle_tx, &handle_ty);
switch (type)
{
case PIKA_HANDLE_SQUARE:
case PIKA_HANDLE_FILLED_SQUARE:
case PIKA_HANDLE_CROSS:
case PIKA_HANDLE_CROSSHAIR:
pika_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 PIKA_HANDLE_CIRCLE:
case PIKA_HANDLE_FILLED_CIRCLE:
pika_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;
}