289 lines
9.4 KiB
C
289 lines
9.4 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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* pikadisplayshell-items.c
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* Copyright (C) 2010 Michael Natterer <mitch@gimp.org>
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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 <libpikamath/pikamath.h>
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#include "display-types.h"
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#include "pikacanvascanvasboundary.h"
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#include "pikacanvascursor.h"
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#include "pikacanvasgrid.h"
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#include "pikacanvaslayerboundary.h"
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#include "pikacanvaspassepartout.h"
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#include "pikacanvasproxygroup.h"
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#include "pikadisplayshell.h"
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#include "pikadisplayshell-expose.h"
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#include "pikadisplayshell-items.h"
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#include "pikadisplayshell-transform.h"
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/* local function prototypes */
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static void pika_display_shell_item_update (PikaCanvasItem *item,
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cairo_region_t *region,
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PikaDisplayShell *shell);
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static void pika_display_shell_unrotated_item_update (PikaCanvasItem *item,
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cairo_region_t *region,
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PikaDisplayShell *shell);
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/* public functions */
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void
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pika_display_shell_items_init (PikaDisplayShell *shell)
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{
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g_return_if_fail (PIKA_IS_DISPLAY_SHELL (shell));
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shell->canvas_item = pika_canvas_group_new (shell);
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shell->passe_partout = pika_canvas_passe_partout_new (shell, 0, 0, 0, 0);
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pika_canvas_item_set_visible (shell->passe_partout, FALSE);
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pika_display_shell_add_item (shell, shell->passe_partout);
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g_object_unref (shell->passe_partout);
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shell->preview_items = pika_canvas_group_new (shell);
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pika_display_shell_add_item (shell, shell->preview_items);
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g_object_unref (shell->preview_items);
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shell->vectors = pika_canvas_proxy_group_new (shell);
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pika_display_shell_add_item (shell, shell->vectors);
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g_object_unref (shell->vectors);
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shell->grid = pika_canvas_grid_new (shell, NULL);
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pika_canvas_item_set_visible (shell->grid, FALSE);
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g_object_set (shell->grid, "grid-style", TRUE, NULL);
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pika_display_shell_add_item (shell, shell->grid);
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g_object_unref (shell->grid);
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shell->guides = pika_canvas_proxy_group_new (shell);
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pika_display_shell_add_item (shell, shell->guides);
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g_object_unref (shell->guides);
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shell->sample_points = pika_canvas_proxy_group_new (shell);
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pika_display_shell_add_item (shell, shell->sample_points);
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g_object_unref (shell->sample_points);
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shell->canvas_boundary = pika_canvas_canvas_boundary_new (shell);
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pika_canvas_item_set_visible (shell->canvas_boundary, FALSE);
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pika_display_shell_add_item (shell, shell->canvas_boundary);
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g_object_unref (shell->canvas_boundary);
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shell->layer_boundary = pika_canvas_layer_boundary_new (shell);
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pika_canvas_item_set_visible (shell->layer_boundary, FALSE);
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pika_display_shell_add_item (shell, shell->layer_boundary);
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g_object_unref (shell->layer_boundary);
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shell->tool_items = pika_canvas_group_new (shell);
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pika_display_shell_add_item (shell, shell->tool_items);
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g_object_unref (shell->tool_items);
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g_signal_connect (shell->canvas_item, "update",
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G_CALLBACK (pika_display_shell_item_update),
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shell);
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shell->unrotated_item = pika_canvas_group_new (shell);
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shell->cursor = pika_canvas_cursor_new (shell);
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pika_canvas_item_set_visible (shell->cursor, FALSE);
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pika_display_shell_add_unrotated_item (shell, shell->cursor);
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g_object_unref (shell->cursor);
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g_signal_connect (shell->unrotated_item, "update",
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G_CALLBACK (pika_display_shell_unrotated_item_update),
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shell);
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}
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void
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pika_display_shell_items_free (PikaDisplayShell *shell)
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{
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g_return_if_fail (PIKA_IS_DISPLAY_SHELL (shell));
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if (shell->canvas_item)
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{
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g_signal_handlers_disconnect_by_func (shell->canvas_item,
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pika_display_shell_item_update,
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shell);
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g_clear_object (&shell->canvas_item);
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shell->passe_partout = NULL;
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shell->preview_items = NULL;
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shell->vectors = NULL;
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shell->grid = NULL;
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shell->guides = NULL;
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shell->sample_points = NULL;
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shell->canvas_boundary = NULL;
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shell->layer_boundary = NULL;
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shell->tool_items = NULL;
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}
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if (shell->unrotated_item)
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{
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g_signal_handlers_disconnect_by_func (shell->unrotated_item,
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pika_display_shell_unrotated_item_update,
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shell);
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g_clear_object (&shell->unrotated_item);
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shell->cursor = NULL;
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}
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}
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void
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pika_display_shell_add_item (PikaDisplayShell *shell,
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PikaCanvasItem *item)
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{
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g_return_if_fail (PIKA_IS_DISPLAY_SHELL (shell));
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g_return_if_fail (PIKA_IS_CANVAS_ITEM (item));
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pika_canvas_group_add_item (PIKA_CANVAS_GROUP (shell->canvas_item), item);
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}
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void
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pika_display_shell_remove_item (PikaDisplayShell *shell,
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PikaCanvasItem *item)
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{
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g_return_if_fail (PIKA_IS_DISPLAY_SHELL (shell));
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g_return_if_fail (PIKA_IS_CANVAS_ITEM (item));
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pika_canvas_group_remove_item (PIKA_CANVAS_GROUP (shell->canvas_item), item);
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}
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void
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pika_display_shell_add_preview_item (PikaDisplayShell *shell,
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PikaCanvasItem *item)
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{
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g_return_if_fail (PIKA_IS_DISPLAY_SHELL (shell));
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g_return_if_fail (PIKA_IS_CANVAS_ITEM (item));
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pika_canvas_group_add_item (PIKA_CANVAS_GROUP (shell->preview_items), item);
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}
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void
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pika_display_shell_remove_preview_item (PikaDisplayShell *shell,
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PikaCanvasItem *item)
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{
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g_return_if_fail (PIKA_IS_DISPLAY_SHELL (shell));
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g_return_if_fail (PIKA_IS_CANVAS_ITEM (item));
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pika_canvas_group_remove_item (PIKA_CANVAS_GROUP (shell->preview_items), item);
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}
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void
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pika_display_shell_add_unrotated_item (PikaDisplayShell *shell,
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PikaCanvasItem *item)
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{
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g_return_if_fail (PIKA_IS_DISPLAY_SHELL (shell));
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g_return_if_fail (PIKA_IS_CANVAS_ITEM (item));
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pika_canvas_group_add_item (PIKA_CANVAS_GROUP (shell->unrotated_item), item);
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}
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void
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pika_display_shell_remove_unrotated_item (PikaDisplayShell *shell,
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PikaCanvasItem *item)
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{
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g_return_if_fail (PIKA_IS_DISPLAY_SHELL (shell));
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g_return_if_fail (PIKA_IS_CANVAS_ITEM (item));
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pika_canvas_group_remove_item (PIKA_CANVAS_GROUP (shell->unrotated_item), item);
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}
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void
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pika_display_shell_add_tool_item (PikaDisplayShell *shell,
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PikaCanvasItem *item)
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{
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g_return_if_fail (PIKA_IS_DISPLAY_SHELL (shell));
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g_return_if_fail (PIKA_IS_CANVAS_ITEM (item));
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pika_canvas_group_add_item (PIKA_CANVAS_GROUP (shell->tool_items), item);
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}
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void
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pika_display_shell_remove_tool_item (PikaDisplayShell *shell,
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PikaCanvasItem *item)
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{
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g_return_if_fail (PIKA_IS_DISPLAY_SHELL (shell));
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g_return_if_fail (PIKA_IS_CANVAS_ITEM (item));
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pika_canvas_group_remove_item (PIKA_CANVAS_GROUP (shell->tool_items), item);
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}
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/* private functions */
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static void
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pika_display_shell_item_update (PikaCanvasItem *item,
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cairo_region_t *region,
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PikaDisplayShell *shell)
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{
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if (shell->rotate_transform)
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{
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gint n_rects;
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gint i;
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n_rects = cairo_region_num_rectangles (region);
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for (i = 0; i < n_rects; i++)
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{
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cairo_rectangle_int_t rect;
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gdouble tx1, ty1;
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gdouble tx2, ty2;
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gint x1, y1, x2, y2;
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cairo_region_get_rectangle (region, i, &rect);
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pika_display_shell_rotate_bounds (shell,
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rect.x, rect.y,
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rect.x + rect.width,
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rect.y + rect.height,
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&tx1, &ty1, &tx2, &ty2);
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x1 = floor (tx1 - 0.5);
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y1 = floor (ty1 - 0.5);
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x2 = ceil (tx2 + 0.5);
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y2 = ceil (ty2 + 0.5);
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pika_display_shell_expose_area (shell, x1, y1, x2 - x1, y2 - y1);
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}
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}
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else
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{
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pika_display_shell_expose_region (shell, region);
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}
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}
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static void
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pika_display_shell_unrotated_item_update (PikaCanvasItem *item,
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cairo_region_t *region,
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PikaDisplayShell *shell)
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{
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pika_display_shell_expose_region (shell, region);
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}
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