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-rw-r--r--app/display/gimpcanvaslayerboundary.c322
1 files changed, 322 insertions, 0 deletions
diff --git a/app/display/gimpcanvaslayerboundary.c b/app/display/gimpcanvaslayerboundary.c
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+++ b/app/display/gimpcanvaslayerboundary.c
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+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpcanvaslayerboundary.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 "libgimpbase/gimpbase.h"
+#include "libgimpmath/gimpmath.h"
+
+#include "display-types.h"
+
+#include "core/gimpchannel.h"
+#include "core/gimplayer.h"
+#include "core/gimplayer-floating-selection.h"
+
+#include "gimpcanvas-style.h"
+#include "gimpcanvaslayerboundary.h"
+#include "gimpdisplayshell.h"
+
+
+enum
+{
+ PROP_0,
+ PROP_LAYER,
+ PROP_EDIT_MASK
+};
+
+
+typedef struct _GimpCanvasLayerBoundaryPrivate GimpCanvasLayerBoundaryPrivate;
+
+struct _GimpCanvasLayerBoundaryPrivate
+{
+ GimpLayer *layer;
+ gboolean edit_mask;
+};
+
+#define GET_PRIVATE(layer_boundary) \
+ ((GimpCanvasLayerBoundaryPrivate *) gimp_canvas_layer_boundary_get_instance_private ((GimpCanvasLayerBoundary *) (layer_boundary)))
+
+
+/* local function prototypes */
+
+static void gimp_canvas_layer_boundary_set_property (GObject *object,
+ guint property_id,
+ const GValue *value,
+ GParamSpec *pspec);
+static void gimp_canvas_layer_boundary_get_property (GObject *object,
+ guint property_id,
+ GValue *value,
+ GParamSpec *pspec);
+static void gimp_canvas_layer_boundary_finalize (GObject *object);
+static void gimp_canvas_layer_boundary_draw (GimpCanvasItem *item,
+ cairo_t *cr);
+static cairo_region_t * gimp_canvas_layer_boundary_get_extents (GimpCanvasItem *item);
+static void gimp_canvas_layer_boundary_stroke (GimpCanvasItem *item,
+ cairo_t *cr);
+
+
+G_DEFINE_TYPE_WITH_PRIVATE (GimpCanvasLayerBoundary, gimp_canvas_layer_boundary,
+ GIMP_TYPE_CANVAS_RECTANGLE)
+
+#define parent_class gimp_canvas_layer_boundary_parent_class
+
+
+static void
+gimp_canvas_layer_boundary_class_init (GimpCanvasLayerBoundaryClass *klass)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+ GimpCanvasItemClass *item_class = GIMP_CANVAS_ITEM_CLASS (klass);
+
+ object_class->set_property = gimp_canvas_layer_boundary_set_property;
+ object_class->get_property = gimp_canvas_layer_boundary_get_property;
+ object_class->finalize = gimp_canvas_layer_boundary_finalize;
+
+ item_class->draw = gimp_canvas_layer_boundary_draw;
+ item_class->get_extents = gimp_canvas_layer_boundary_get_extents;
+ item_class->stroke = gimp_canvas_layer_boundary_stroke;
+
+ g_object_class_install_property (object_class, PROP_LAYER,
+ g_param_spec_object ("layer", NULL, NULL,
+ GIMP_TYPE_LAYER,
+ GIMP_PARAM_READWRITE));
+
+ g_object_class_install_property (object_class, PROP_EDIT_MASK,
+ g_param_spec_boolean ("edit-mask", NULL, NULL,
+ FALSE,
+ GIMP_PARAM_READWRITE));
+}
+
+static void
+gimp_canvas_layer_boundary_init (GimpCanvasLayerBoundary *layer_boundary)
+{
+}
+
+static void
+gimp_canvas_layer_boundary_finalize (GObject *object)
+{
+ GimpCanvasLayerBoundaryPrivate *private = GET_PRIVATE (object);
+
+ if (private->layer)
+ g_object_remove_weak_pointer (G_OBJECT (private->layer),
+ (gpointer) &private->layer);
+
+ G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+static void
+gimp_canvas_layer_boundary_set_property (GObject *object,
+ guint property_id,
+ const GValue *value,
+ GParamSpec *pspec)
+{
+ GimpCanvasLayerBoundaryPrivate *private = GET_PRIVATE (object);
+
+ switch (property_id)
+ {
+ case PROP_LAYER:
+ if (private->layer)
+ g_object_remove_weak_pointer (G_OBJECT (private->layer),
+ (gpointer) &private->layer);
+ private->layer = g_value_get_object (value); /* don't ref */
+ if (private->layer)
+ g_object_add_weak_pointer (G_OBJECT (private->layer),
+ (gpointer) &private->layer);
+ break;
+ case PROP_EDIT_MASK:
+ private->edit_mask = g_value_get_boolean (value);
+ break;
+
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+ break;
+ }
+}
+
+static void
+gimp_canvas_layer_boundary_get_property (GObject *object,
+ guint property_id,
+ GValue *value,
+ GParamSpec *pspec)
+{
+ GimpCanvasLayerBoundaryPrivate *private = GET_PRIVATE (object);
+
+ switch (property_id)
+ {
+ case PROP_LAYER:
+ g_value_set_object (value, private->layer);
+ break;
+ case PROP_EDIT_MASK:
+ g_value_set_boolean (value, private->edit_mask);
+ break;
+
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+ break;
+ }
+}
+
+static void
+gimp_canvas_layer_boundary_draw (GimpCanvasItem *item,
+ cairo_t *cr)
+{
+ GimpCanvasLayerBoundaryPrivate *private = GET_PRIVATE (item);
+
+ if (private->layer)
+ GIMP_CANVAS_ITEM_CLASS (parent_class)->draw (item, cr);
+}
+
+static cairo_region_t *
+gimp_canvas_layer_boundary_get_extents (GimpCanvasItem *item)
+{
+ GimpCanvasLayerBoundaryPrivate *private = GET_PRIVATE (item);
+
+ if (private->layer)
+ return GIMP_CANVAS_ITEM_CLASS (parent_class)->get_extents (item);
+
+ return NULL;
+}
+
+static void
+gimp_canvas_layer_boundary_stroke (GimpCanvasItem *item,
+ cairo_t *cr)
+{
+ GimpCanvasLayerBoundaryPrivate *private = GET_PRIVATE (item);
+ GimpDisplayShell *shell = gimp_canvas_item_get_shell (item);
+
+ gimp_canvas_set_layer_style (gimp_canvas_item_get_canvas (item), cr,
+ private->layer,
+ shell->offset_x, shell->offset_y);
+ cairo_stroke (cr);
+}
+
+GimpCanvasItem *
+gimp_canvas_layer_boundary_new (GimpDisplayShell *shell)
+{
+ g_return_val_if_fail (GIMP_IS_DISPLAY_SHELL (shell), NULL);
+
+ return g_object_new (GIMP_TYPE_CANVAS_LAYER_BOUNDARY,
+ "shell", shell,
+ NULL);
+}
+
+void
+gimp_canvas_layer_boundary_set_layer (GimpCanvasLayerBoundary *boundary,
+ GimpLayer *layer)
+{
+ GimpCanvasLayerBoundaryPrivate *private;
+
+ g_return_if_fail (GIMP_IS_CANVAS_LAYER_BOUNDARY (boundary));
+ g_return_if_fail (layer == NULL || GIMP_IS_LAYER (layer));
+
+ private = GET_PRIVATE (boundary);
+
+ if (layer && gimp_layer_is_floating_sel (layer))
+ {
+ GimpDrawable *drawable;
+
+ drawable = gimp_layer_get_floating_sel_drawable (layer);
+
+ if (GIMP_IS_CHANNEL (drawable))
+ {
+ /* if the owner drawable is a channel, show no outline */
+
+ layer = NULL;
+ }
+ else
+ {
+ /* otherwise, set the layer to the owner drawable */
+
+ layer = GIMP_LAYER (drawable);
+ }
+ }
+
+ if (layer != private->layer)
+ {
+ gboolean edit_mask = FALSE;
+
+ gimp_canvas_item_begin_change (GIMP_CANVAS_ITEM (boundary));
+
+ if (layer)
+ {
+ GimpItem *item = GIMP_ITEM (layer);
+
+ edit_mask = (gimp_layer_get_mask (layer) &&
+ gimp_layer_get_edit_mask (layer));
+
+ g_object_set (boundary,
+ "x", (gdouble) gimp_item_get_offset_x (item),
+ "y", (gdouble) gimp_item_get_offset_y (item),
+ "width", (gdouble) gimp_item_get_width (item),
+ "height", (gdouble) gimp_item_get_height (item),
+ NULL);
+ }
+
+ g_object_set (boundary,
+ "layer", layer,
+ "edit-mask", edit_mask,
+ NULL);
+
+ gimp_canvas_item_end_change (GIMP_CANVAS_ITEM (boundary));
+ }
+ else if (layer && layer == private->layer)
+ {
+ GimpItem *item = GIMP_ITEM (layer);
+ gint lx, ly, lw, lh;
+ gdouble x, y, w ,h;
+ gboolean edit_mask;
+
+ lx = gimp_item_get_offset_x (item);
+ ly = gimp_item_get_offset_y (item);
+ lw = gimp_item_get_width (item);
+ lh = gimp_item_get_height (item);
+
+ edit_mask = (gimp_layer_get_mask (layer) &&
+ gimp_layer_get_edit_mask (layer));
+
+ g_object_get (boundary,
+ "x", &x,
+ "y", &y,
+ "width", &w,
+ "height", &h,
+ NULL);
+
+ if (lx != (gint) x ||
+ ly != (gint) y ||
+ lw != (gint) w ||
+ lh != (gint) h ||
+ edit_mask != private->edit_mask)
+ {
+ gimp_canvas_item_begin_change (GIMP_CANVAS_ITEM (boundary));
+
+ g_object_set (boundary,
+ "x", (gdouble) lx,
+ "y", (gdouble) ly,
+ "width", (gdouble) lw,
+ "height", (gdouble) lh,
+ "edit-mask", edit_mask,
+ NULL);
+
+ gimp_canvas_item_end_change (GIMP_CANVAS_ITEM (boundary));
+ }
+ }
+}
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