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gimp/app/display/gimpdisplayshell-items.c

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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpdisplayshell-items.c
* Copyright (C) 2010 Michael Natterer <mitch@gimp.org>
*
* 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 <libgimpmath/gimpmath.h>
#include "display-types.h"
#include "gimpcanvascanvasboundary.h"
#include "gimpcanvascursor.h"
#include "gimpcanvasgrid.h"
#include "gimpcanvaslayerboundary.h"
#include "gimpcanvaspassepartout.h"
#include "gimpcanvasproxygroup.h"
#include "gimpdisplayshell.h"
#include "gimpdisplayshell-expose.h"
#include "gimpdisplayshell-items.h"
#include "gimpdisplayshell-transform.h"
/* local function prototypes */
static void gimp_display_shell_item_update (GimpCanvasItem *item,
cairo_region_t *region,
GimpDisplayShell *shell);
static void gimp_display_shell_unrotated_item_update (GimpCanvasItem *item,
cairo_region_t *region,
GimpDisplayShell *shell);
/* public functions */
void
gimp_display_shell_items_init (GimpDisplayShell *shell)
{
g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
shell->canvas_item = gimp_canvas_group_new (shell);
shell->passe_partout = gimp_canvas_passe_partout_new (shell, 0, 0, 0, 0);
gimp_canvas_item_set_visible (shell->passe_partout, FALSE);
gimp_display_shell_add_item (shell, shell->passe_partout);
g_object_unref (shell->passe_partout);
shell->preview_items = gimp_canvas_group_new (shell);
gimp_display_shell_add_item (shell, shell->preview_items);
g_object_unref (shell->preview_items);
shell->vectors = gimp_canvas_proxy_group_new (shell);
gimp_display_shell_add_item (shell, shell->vectors);
g_object_unref (shell->vectors);
shell->grid = gimp_canvas_grid_new (shell, NULL);
gimp_canvas_item_set_visible (shell->grid, FALSE);
g_object_set (shell->grid, "grid-style", TRUE, NULL);
gimp_display_shell_add_item (shell, shell->grid);
g_object_unref (shell->grid);
shell->guides = gimp_canvas_proxy_group_new (shell);
gimp_display_shell_add_item (shell, shell->guides);
g_object_unref (shell->guides);
shell->sample_points = gimp_canvas_proxy_group_new (shell);
gimp_display_shell_add_item (shell, shell->sample_points);
g_object_unref (shell->sample_points);
shell->canvas_boundary = gimp_canvas_canvas_boundary_new (shell);
gimp_canvas_item_set_visible (shell->canvas_boundary, FALSE);
gimp_display_shell_add_item (shell, shell->canvas_boundary);
g_object_unref (shell->canvas_boundary);
shell->layer_boundary = gimp_canvas_layer_boundary_new (shell);
gimp_canvas_item_set_visible (shell->layer_boundary, FALSE);
gimp_display_shell_add_item (shell, shell->layer_boundary);
g_object_unref (shell->layer_boundary);
shell->tool_items = gimp_canvas_group_new (shell);
gimp_display_shell_add_item (shell, shell->tool_items);
g_object_unref (shell->tool_items);
g_signal_connect (shell->canvas_item, "update",
G_CALLBACK (gimp_display_shell_item_update),
shell);
shell->unrotated_item = gimp_canvas_group_new (shell);
shell->cursor = gimp_canvas_cursor_new (shell);
gimp_canvas_item_set_visible (shell->cursor, FALSE);
gimp_display_shell_add_unrotated_item (shell, shell->cursor);
g_object_unref (shell->cursor);
g_signal_connect (shell->unrotated_item, "update",
G_CALLBACK (gimp_display_shell_unrotated_item_update),
shell);
}
void
gimp_display_shell_items_free (GimpDisplayShell *shell)
{
g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
if (shell->canvas_item)
{
g_signal_handlers_disconnect_by_func (shell->canvas_item,
gimp_display_shell_item_update,
shell);
g_clear_object (&shell->canvas_item);
shell->passe_partout = NULL;
shell->preview_items = NULL;
shell->vectors = NULL;
shell->grid = NULL;
shell->guides = NULL;
shell->sample_points = NULL;
shell->canvas_boundary = NULL;
shell->layer_boundary = NULL;
shell->tool_items = NULL;
}
if (shell->unrotated_item)
{
g_signal_handlers_disconnect_by_func (shell->unrotated_item,
gimp_display_shell_unrotated_item_update,
shell);
g_clear_object (&shell->unrotated_item);
shell->cursor = NULL;
}
}
void
gimp_display_shell_add_item (GimpDisplayShell *shell,
GimpCanvasItem *item)
{
g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
g_return_if_fail (GIMP_IS_CANVAS_ITEM (item));
gimp_canvas_group_add_item (GIMP_CANVAS_GROUP (shell->canvas_item), item);
}
void
gimp_display_shell_remove_item (GimpDisplayShell *shell,
GimpCanvasItem *item)
{
g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
g_return_if_fail (GIMP_IS_CANVAS_ITEM (item));
gimp_canvas_group_remove_item (GIMP_CANVAS_GROUP (shell->canvas_item), item);
}
void
gimp_display_shell_add_preview_item (GimpDisplayShell *shell,
GimpCanvasItem *item)
{
g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
g_return_if_fail (GIMP_IS_CANVAS_ITEM (item));
gimp_canvas_group_add_item (GIMP_CANVAS_GROUP (shell->preview_items), item);
}
void
gimp_display_shell_remove_preview_item (GimpDisplayShell *shell,
GimpCanvasItem *item)
{
g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
g_return_if_fail (GIMP_IS_CANVAS_ITEM (item));
gimp_canvas_group_remove_item (GIMP_CANVAS_GROUP (shell->preview_items), item);
}
void
gimp_display_shell_add_unrotated_item (GimpDisplayShell *shell,
GimpCanvasItem *item)
{
g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
g_return_if_fail (GIMP_IS_CANVAS_ITEM (item));
gimp_canvas_group_add_item (GIMP_CANVAS_GROUP (shell->unrotated_item), item);
}
void
gimp_display_shell_remove_unrotated_item (GimpDisplayShell *shell,
GimpCanvasItem *item)
{
g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
g_return_if_fail (GIMP_IS_CANVAS_ITEM (item));
gimp_canvas_group_remove_item (GIMP_CANVAS_GROUP (shell->unrotated_item), item);
}
void
gimp_display_shell_add_tool_item (GimpDisplayShell *shell,
GimpCanvasItem *item)
{
g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
g_return_if_fail (GIMP_IS_CANVAS_ITEM (item));
gimp_canvas_group_add_item (GIMP_CANVAS_GROUP (shell->tool_items), item);
}
void
gimp_display_shell_remove_tool_item (GimpDisplayShell *shell,
GimpCanvasItem *item)
{
g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
g_return_if_fail (GIMP_IS_CANVAS_ITEM (item));
gimp_canvas_group_remove_item (GIMP_CANVAS_GROUP (shell->tool_items), item);
}
/* private functions */
static void
gimp_display_shell_item_update (GimpCanvasItem *item,
cairo_region_t *region,
GimpDisplayShell *shell)
{
if (shell->rotate_transform)
{
gint n_rects;
gint i;
n_rects = cairo_region_num_rectangles (region);
for (i = 0; i < n_rects; i++)
{
cairo_rectangle_int_t rect;
gdouble tx1, ty1;
gdouble tx2, ty2;
gint x1, y1, x2, y2;
cairo_region_get_rectangle (region, i, &rect);
gimp_display_shell_rotate_bounds (shell,
rect.x, rect.y,
rect.x + rect.width,
rect.y + rect.height,
&tx1, &ty1, &tx2, &ty2);
x1 = floor (tx1 - 0.5);
y1 = floor (ty1 - 0.5);
x2 = ceil (tx2 + 0.5);
y2 = ceil (ty2 + 0.5);
gimp_display_shell_expose_area (shell, x1, y1, x2 - x1, y2 - y1);
}
}
else
{
gimp_display_shell_expose_region (shell, region);
}
}
static void
gimp_display_shell_unrotated_item_update (GimpCanvasItem *item,
cairo_region_t *region,
GimpDisplayShell *shell)
{
gimp_display_shell_expose_region (shell, region);
}
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