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-rw-r--r--app/display/gimpdisplayshell-items.c284
1 files changed, 284 insertions, 0 deletions
diff --git a/app/display/gimpdisplayshell-items.c b/app/display/gimpdisplayshell-items.c
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+++ b/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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