mirror of https://github.com/GNOME/gimp.git
app: add a boundary canvas item class
This can be done much better, but this one kindof works for now.
This commit is contained in:
Michael Natterer
parent
d921f8520b
commit
483efcbff5
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@ -19,6 +19,8 @@ libappdisplay_a_sources = \
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display-types.h \
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gimpcanvas.c \
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gimpcanvas.h \
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gimpcanvasboundary.c \
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gimpcanvasboundary.h \
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gimpcanvasguide.c \
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gimpcanvasguide.h \
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gimpcanvashandle.c \
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@ -0,0 +1,339 @@
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/* GIMP - The GNU Image Manipulation Program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* gimpcanvasboundary.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 <http://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 "libgimpbase/gimpbase.h"
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#include "libgimpmath/gimpmath.h"
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#include "display-types.h"
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#include "base/boundary.h"
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#include "core/gimpparamspecs.h"
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#include "gimpcanvasboundary.h"
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#include "gimpdisplayshell.h"
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#include "gimpdisplayshell-transform.h"
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enum
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{
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PROP_0,
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PROP_SEGS,
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PROP_OFFSET_X,
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PROP_OFFSET_Y
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};
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typedef struct _GimpCanvasBoundaryPrivate GimpCanvasBoundaryPrivate;
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struct _GimpCanvasBoundaryPrivate
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{
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BoundSeg *segs;
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gint n_segs;
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gdouble offset_x;
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gdouble offset_y;
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};
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#define GET_PRIVATE(boundary) \
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G_TYPE_INSTANCE_GET_PRIVATE (boundary, \
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GIMP_TYPE_CANVAS_BOUNDARY, \
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GimpCanvasBoundaryPrivate)
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/* local function prototypes */
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static void gimp_canvas_boundary_finalize (GObject *object);
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static void gimp_canvas_boundary_set_property (GObject *object,
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guint property_id,
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const GValue *value,
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GParamSpec *pspec);
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static void gimp_canvas_boundary_get_property (GObject *object,
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guint property_id,
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GValue *value,
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GParamSpec *pspec);
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static void gimp_canvas_boundary_draw (GimpCanvasItem *item,
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GimpDisplayShell *shell,
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cairo_t *cr);
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static GdkRegion * gimp_canvas_boundary_get_extents (GimpCanvasItem *item,
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GimpDisplayShell *shell);
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G_DEFINE_TYPE (GimpCanvasBoundary, gimp_canvas_boundary,
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GIMP_TYPE_CANVAS_ITEM)
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#define parent_class gimp_canvas_boundary_parent_class
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static void
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gimp_canvas_boundary_class_init (GimpCanvasBoundaryClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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GimpCanvasItemClass *item_class = GIMP_CANVAS_ITEM_CLASS (klass);
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object_class->finalize = gimp_canvas_boundary_finalize;
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object_class->set_property = gimp_canvas_boundary_set_property;
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object_class->get_property = gimp_canvas_boundary_get_property;
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item_class->draw = gimp_canvas_boundary_draw;
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item_class->get_extents = gimp_canvas_boundary_get_extents;
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g_object_class_install_property (object_class, PROP_SEGS,
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gimp_param_spec_array ("segs", NULL, NULL,
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GIMP_PARAM_READWRITE));
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g_object_class_install_property (object_class, PROP_OFFSET_X,
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g_param_spec_double ("offset-x", NULL, NULL,
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-GIMP_MAX_IMAGE_SIZE,
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GIMP_MAX_IMAGE_SIZE, 0,
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GIMP_PARAM_READWRITE));
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g_object_class_install_property (object_class, PROP_OFFSET_Y,
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g_param_spec_double ("offset-y", NULL, NULL,
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-GIMP_MAX_IMAGE_SIZE,
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GIMP_MAX_IMAGE_SIZE, 0,
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GIMP_PARAM_READWRITE));
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g_type_class_add_private (klass, sizeof (GimpCanvasBoundaryPrivate));
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}
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static void
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gimp_canvas_boundary_init (GimpCanvasBoundary *boundary)
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{
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}
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static void
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gimp_canvas_boundary_finalize (GObject *object)
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{
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GimpCanvasBoundaryPrivate *private = GET_PRIVATE (object);
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if (private->segs)
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{
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g_free (private->segs);
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private->segs = NULL;
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private->n_segs = 0;
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}
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static void
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gimp_canvas_boundary_set_property (GObject *object,
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guint property_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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GimpCanvasBoundaryPrivate *private = GET_PRIVATE (object);
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switch (property_id)
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{
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case PROP_SEGS:
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break;
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case PROP_OFFSET_X:
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private->offset_x = g_value_get_double (value);
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break;
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case PROP_OFFSET_Y:
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private->offset_y = g_value_get_double (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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break;
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}
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}
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static void
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gimp_canvas_boundary_get_property (GObject *object,
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guint property_id,
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GValue *value,
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GParamSpec *pspec)
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{
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GimpCanvasBoundaryPrivate *private = GET_PRIVATE (object);
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switch (property_id)
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{
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case PROP_SEGS:
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break;
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case PROP_OFFSET_X:
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g_value_set_double (value, private->offset_x);
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break;
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case PROP_OFFSET_Y:
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g_value_set_double (value, private->offset_y);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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break;
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}
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}
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static void
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gimp_canvas_boundary_transform (GimpCanvasItem *item,
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GimpDisplayShell *shell,
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BoundSeg *segs)
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{
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GimpCanvasBoundaryPrivate *private = GET_PRIVATE (item);
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gint i;
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for (i = 0; i < private->n_segs; i++)
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{
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if (private->segs[i].x1 == -1 &&
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private->segs[i].y1 == -1 &&
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private->segs[i].x2 == -1 &&
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private->segs[i].y2 == -1)
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{
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segs[i] = private->segs[i];
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}
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else
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{
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gimp_display_shell_transform_xy (shell,
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private->segs[i].x1 +
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private->offset_x,
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private->segs[i].y1 +
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private->offset_y,
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&segs[i].x1,
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&segs[i].y1);
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gimp_display_shell_transform_xy (shell,
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private->segs[i].x2 +
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private->offset_x,
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private->segs[i].y2 +
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private->offset_y,
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&segs[i].x2,
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&segs[i].y2);
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}
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}
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}
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static void
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gimp_canvas_boundary_draw (GimpCanvasItem *item,
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GimpDisplayShell *shell,
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cairo_t *cr)
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{
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GimpCanvasBoundaryPrivate *private = GET_PRIVATE (item);
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BoundSeg *segs;
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gint i;
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segs = g_new0 (BoundSeg, private->n_segs);
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gimp_canvas_boundary_transform (item, shell, segs);
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cairo_move_to (cr, segs[0].x1 + 0.5, segs[0].y1 + 0.5);
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for (i = 1; i < private->n_segs; i++)
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{
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if (segs[i].x1 == -1 &&
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segs[i].y1 == -1 &&
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segs[i].x2 == -1 &&
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segs[i].y2 == -1)
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{
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cairo_close_path (cr);
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_gimp_canvas_item_stroke (item, shell, cr);
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i++;
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if (i == private->n_segs)
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break;
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cairo_move_to (cr, segs[i].x1 + 0.5, segs[i].y1 + 0.5);
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}
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else
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{
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cairo_line_to (cr, segs[i].x1 + 0.5, segs[i].y1 + 0.5);
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}
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}
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cairo_close_path (cr);
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_gimp_canvas_item_stroke (item, shell, cr);
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g_free (segs);
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}
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static GdkRegion *
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gimp_canvas_boundary_get_extents (GimpCanvasItem *item,
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GimpDisplayShell *shell)
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{
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GimpCanvasBoundaryPrivate *private = GET_PRIVATE (item);
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GdkRectangle rectangle;
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BoundSeg *segs;
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gint x1, y1, x2, y2;
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gint i;
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segs = g_new0 (BoundSeg, private->n_segs);
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gimp_canvas_boundary_transform (item, shell, segs);
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x1 = segs[0].x1 - 1;
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y1 = segs[0].y1 - 1;
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x2 = x1 + 3;
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y2 = y1 + 3;
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for (i = 1; i < private->n_segs; i++)
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{
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if (segs[i].x1 != -1 ||
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segs[i].y1 != -1 ||
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segs[i].x2 != -1 ||
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segs[i].y2 != -1)
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{
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gint x3 = segs[i].x1 - 1;
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gint y3 = segs[i].y1 - 1;
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gint x4 = x3 + 3;
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gint y4 = y3 + 3;
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x1 = MIN (x1, x3);
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y1 = MIN (y1, y3);
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x2 = MAX (x2, x4);
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y2 = MAX (y2, y4);
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}
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}
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g_free (segs);
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rectangle.x = x1;
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rectangle.y = y1;
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rectangle.width = x2 - x1;
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rectangle.height = y2 - y1;
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return gdk_region_rectangle (&rectangle);
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}
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GimpCanvasItem *
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gimp_canvas_boundary_new (const BoundSeg *segs,
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gint n_segs,
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gdouble offset_x,
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gdouble offset_y)
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{
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GimpCanvasItem *item;
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GimpCanvasBoundaryPrivate *private;
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item = g_object_new (GIMP_TYPE_CANVAS_BOUNDARY,
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"offset-x", offset_x,
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"offset-y", offset_y,
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NULL);
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private = GET_PRIVATE (item);
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/* puke */
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private->segs = g_memdup (segs, n_segs * sizeof (BoundSeg));
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private->n_segs = n_segs;
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return item;
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}
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@ -0,0 +1,58 @@
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/* GIMP - The GNU Image Manipulation Program Copyright (C) 1995
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* Spencer Kimball and Peter Mattis
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*
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* gimpcanvasboundary.h
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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 <http://www.gnu.org/licenses/>.
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*/
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#ifndef __GIMP_CANVAS_BOUNDARY_H__
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#define __GIMP_CANVAS_BOUNDARY_H__
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#include "gimpcanvasitem.h"
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#define GIMP_TYPE_CANVAS_BOUNDARY (gimp_canvas_boundary_get_type ())
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#define GIMP_CANVAS_BOUNDARY(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_CANVAS_BOUNDARY, GimpCanvasBoundary))
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#define GIMP_CANVAS_BOUNDARY_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_CANVAS_BOUNDARY, GimpCanvasBoundaryClass))
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#define GIMP_IS_CANVAS_BOUNDARY(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_CANVAS_BOUNDARY))
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#define GIMP_IS_CANVAS_BOUNDARY_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_CANVAS_BOUNDARY))
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#define GIMP_CANVAS_BOUNDARY_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GIMP_TYPE_CANVAS_BOUNDARY, GimpCanvasBoundaryClass))
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typedef struct _GimpCanvasBoundary GimpCanvasBoundary;
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typedef struct _GimpCanvasBoundaryClass GimpCanvasBoundaryClass;
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struct _GimpCanvasBoundary
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{
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GimpCanvasItem parent_instance;
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};
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struct _GimpCanvasBoundaryClass
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{
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GimpCanvasItemClass parent_class;
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};
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GType gimp_canvas_boundary_get_type (void) G_GNUC_CONST;
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GimpCanvasItem * gimp_canvas_boundary_new (const BoundSeg *segs,
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gint n_segs,
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gdouble offset_x,
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gdouble offset_y);
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#endif /* __GIMP_CANVAS_BOUNDARY_H__ */
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