Commit 483efcbf authored by Michael Natterer's avatar Michael Natterer 😴
Browse files

app: add a boundary canvas item class

This can be done much better, but this one kindof works for now.
parent d921f852
......@@ -19,6 +19,8 @@ libappdisplay_a_sources = \
display-types.h \
gimpcanvas.c \
gimpcanvas.h \
gimpcanvasboundary.c \
gimpcanvasboundary.h \
gimpcanvasguide.c \
gimpcanvasguide.h \
gimpcanvashandle.c \
......
/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpcanvasboundary.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 <http://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 "base/boundary.h"
#include "core/gimpparamspecs.h"
#include "gimpcanvasboundary.h"
#include "gimpdisplayshell.h"
#include "gimpdisplayshell-transform.h"
enum
{
PROP_0,
PROP_SEGS,
PROP_OFFSET_X,
PROP_OFFSET_Y
};
typedef struct _GimpCanvasBoundaryPrivate GimpCanvasBoundaryPrivate;
struct _GimpCanvasBoundaryPrivate
{
BoundSeg *segs;
gint n_segs;
gdouble offset_x;
gdouble offset_y;
};
#define GET_PRIVATE(boundary) \
G_TYPE_INSTANCE_GET_PRIVATE (boundary, \
GIMP_TYPE_CANVAS_BOUNDARY, \
GimpCanvasBoundaryPrivate)
/* local function prototypes */
static void gimp_canvas_boundary_finalize (GObject *object);
static void gimp_canvas_boundary_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gimp_canvas_boundary_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static void gimp_canvas_boundary_draw (GimpCanvasItem *item,
GimpDisplayShell *shell,
cairo_t *cr);
static GdkRegion * gimp_canvas_boundary_get_extents (GimpCanvasItem *item,
GimpDisplayShell *shell);
G_DEFINE_TYPE (GimpCanvasBoundary, gimp_canvas_boundary,
GIMP_TYPE_CANVAS_ITEM)
#define parent_class gimp_canvas_boundary_parent_class
static void
gimp_canvas_boundary_class_init (GimpCanvasBoundaryClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GimpCanvasItemClass *item_class = GIMP_CANVAS_ITEM_CLASS (klass);
object_class->finalize = gimp_canvas_boundary_finalize;
object_class->set_property = gimp_canvas_boundary_set_property;
object_class->get_property = gimp_canvas_boundary_get_property;
item_class->draw = gimp_canvas_boundary_draw;
item_class->get_extents = gimp_canvas_boundary_get_extents;
g_object_class_install_property (object_class, PROP_SEGS,
gimp_param_spec_array ("segs", NULL, NULL,
GIMP_PARAM_READWRITE));
g_object_class_install_property (object_class, PROP_OFFSET_X,
g_param_spec_double ("offset-x", NULL, NULL,
-GIMP_MAX_IMAGE_SIZE,
GIMP_MAX_IMAGE_SIZE, 0,
GIMP_PARAM_READWRITE));
g_object_class_install_property (object_class, PROP_OFFSET_Y,
g_param_spec_double ("offset-y", NULL, NULL,
-GIMP_MAX_IMAGE_SIZE,
GIMP_MAX_IMAGE_SIZE, 0,
GIMP_PARAM_READWRITE));
g_type_class_add_private (klass, sizeof (GimpCanvasBoundaryPrivate));
}
static void
gimp_canvas_boundary_init (GimpCanvasBoundary *boundary)
{
}
static void
gimp_canvas_boundary_finalize (GObject *object)
{
GimpCanvasBoundaryPrivate *private = GET_PRIVATE (object);
if (private->segs)
{
g_free (private->segs);
private->segs = NULL;
private->n_segs = 0;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gimp_canvas_boundary_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GimpCanvasBoundaryPrivate *private = GET_PRIVATE (object);
switch (property_id)
{
case PROP_SEGS:
break;
case PROP_OFFSET_X:
private->offset_x = g_value_get_double (value);
break;
case PROP_OFFSET_Y:
private->offset_y = g_value_get_double (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_canvas_boundary_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GimpCanvasBoundaryPrivate *private = GET_PRIVATE (object);
switch (property_id)
{
case PROP_SEGS:
break;
case PROP_OFFSET_X:
g_value_set_double (value, private->offset_x);
break;
case PROP_OFFSET_Y:
g_value_set_double (value, private->offset_y);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_canvas_boundary_transform (GimpCanvasItem *item,
GimpDisplayShell *shell,
BoundSeg *segs)
{
GimpCanvasBoundaryPrivate *private = GET_PRIVATE (item);
gint i;
for (i = 0; i < private->n_segs; i++)
{
if (private->segs[i].x1 == -1 &&
private->segs[i].y1 == -1 &&
private->segs[i].x2 == -1 &&
private->segs[i].y2 == -1)
{
segs[i] = private->segs[i];
}
else
{
gimp_display_shell_transform_xy (shell,
private->segs[i].x1 +
private->offset_x,
private->segs[i].y1 +
private->offset_y,
&segs[i].x1,
&segs[i].y1);
gimp_display_shell_transform_xy (shell,
private->segs[i].x2 +
private->offset_x,
private->segs[i].y2 +
private->offset_y,
&segs[i].x2,
&segs[i].y2);
}
}
}
static void
gimp_canvas_boundary_draw (GimpCanvasItem *item,
GimpDisplayShell *shell,
cairo_t *cr)
{
GimpCanvasBoundaryPrivate *private = GET_PRIVATE (item);
BoundSeg *segs;
gint i;
segs = g_new0 (BoundSeg, private->n_segs);
gimp_canvas_boundary_transform (item, shell, segs);
cairo_move_to (cr, segs[0].x1 + 0.5, segs[0].y1 + 0.5);
for (i = 1; i < private->n_segs; i++)
{
if (segs[i].x1 == -1 &&
segs[i].y1 == -1 &&
segs[i].x2 == -1 &&
segs[i].y2 == -1)
{
cairo_close_path (cr);
_gimp_canvas_item_stroke (item, shell, cr);
i++;
if (i == private->n_segs)
break;
cairo_move_to (cr, segs[i].x1 + 0.5, segs[i].y1 + 0.5);
}
else
{
cairo_line_to (cr, segs[i].x1 + 0.5, segs[i].y1 + 0.5);
}
}
cairo_close_path (cr);
_gimp_canvas_item_stroke (item, shell, cr);
g_free (segs);
}
static GdkRegion *
gimp_canvas_boundary_get_extents (GimpCanvasItem *item,
GimpDisplayShell *shell)
{
GimpCanvasBoundaryPrivate *private = GET_PRIVATE (item);
GdkRectangle rectangle;
BoundSeg *segs;
gint x1, y1, x2, y2;
gint i;
segs = g_new0 (BoundSeg, private->n_segs);
gimp_canvas_boundary_transform (item, shell, segs);
x1 = segs[0].x1 - 1;
y1 = segs[0].y1 - 1;
x2 = x1 + 3;
y2 = y1 + 3;
for (i = 1; i < private->n_segs; i++)
{
if (segs[i].x1 != -1 ||
segs[i].y1 != -1 ||
segs[i].x2 != -1 ||
segs[i].y2 != -1)
{
gint x3 = segs[i].x1 - 1;
gint y3 = segs[i].y1 - 1;
gint x4 = x3 + 3;
gint y4 = y3 + 3;
x1 = MIN (x1, x3);
y1 = MIN (y1, y3);
x2 = MAX (x2, x4);
y2 = MAX (y2, y4);
}
}
g_free (segs);
rectangle.x = x1;
rectangle.y = y1;
rectangle.width = x2 - x1;
rectangle.height = y2 - y1;
return gdk_region_rectangle (&rectangle);
}
GimpCanvasItem *
gimp_canvas_boundary_new (const BoundSeg *segs,
gint n_segs,
gdouble offset_x,
gdouble offset_y)
{
GimpCanvasItem *item;
GimpCanvasBoundaryPrivate *private;
item = g_object_new (GIMP_TYPE_CANVAS_BOUNDARY,
"offset-x", offset_x,
"offset-y", offset_y,
NULL);
private = GET_PRIVATE (item);
/* puke */
private->segs = g_memdup (segs, n_segs * sizeof (BoundSeg));
private->n_segs = n_segs;
return item;
}
/* GIMP - The GNU Image Manipulation Program Copyright (C) 1995
* Spencer Kimball and Peter Mattis
*
* gimpcanvasboundary.h
* 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 <http://www.gnu.org/licenses/>.
*/
#ifndef __GIMP_CANVAS_BOUNDARY_H__
#define __GIMP_CANVAS_BOUNDARY_H__
#include "gimpcanvasitem.h"
#define GIMP_TYPE_CANVAS_BOUNDARY (gimp_canvas_boundary_get_type ())
#define GIMP_CANVAS_BOUNDARY(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_CANVAS_BOUNDARY, GimpCanvasBoundary))
#define GIMP_CANVAS_BOUNDARY_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_CANVAS_BOUNDARY, GimpCanvasBoundaryClass))
#define GIMP_IS_CANVAS_BOUNDARY(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_CANVAS_BOUNDARY))
#define GIMP_IS_CANVAS_BOUNDARY_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_CANVAS_BOUNDARY))
#define GIMP_CANVAS_BOUNDARY_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GIMP_TYPE_CANVAS_BOUNDARY, GimpCanvasBoundaryClass))
typedef struct _GimpCanvasBoundary GimpCanvasBoundary;
typedef struct _GimpCanvasBoundaryClass GimpCanvasBoundaryClass;
struct _GimpCanvasBoundary
{
GimpCanvasItem parent_instance;
};
struct _GimpCanvasBoundaryClass
{
GimpCanvasItemClass parent_class;
};
GType gimp_canvas_boundary_get_type (void) G_GNUC_CONST;
GimpCanvasItem * gimp_canvas_boundary_new (const BoundSeg *segs,
gint n_segs,
gdouble offset_x,
gdouble offset_y);
#endif /* __GIMP_CANVAS_BOUNDARY_H__ */
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