Commit 8dbab53f authored by Michael Natterer's avatar Michael Natterer 😴
Browse files

app: add a guide line canvas item class

parent 612aee9f
......@@ -19,6 +19,8 @@ libappdisplay_a_sources = \
display-types.h \
gimpcanvas.c \
gimpcanvas.h \
gimpcanvasguide.c \
gimpcanvasguide.h \
gimpcanvashandle.c \
gimpcanvashandle.h \
gimpcanvasitem.c \
......
/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpcanvasguide.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 "gimpcanvasguide.h"
#include "gimpdisplayshell.h"
#include "gimpdisplayshell-transform.h"
enum
{
PROP_0,
PROP_ORIENTATION,
PROP_POSITION
};
typedef struct _GimpCanvasGuidePrivate GimpCanvasGuidePrivate;
struct _GimpCanvasGuidePrivate
{
GimpOrientationType orientation;
gint position;
};
#define GET_PRIVATE(guide) \
G_TYPE_INSTANCE_GET_PRIVATE (guide, \
GIMP_TYPE_CANVAS_GUIDE, \
GimpCanvasGuidePrivate)
/* local function prototypes */
static void gimp_canvas_guide_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gimp_canvas_guide_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static void gimp_canvas_guide_draw (GimpCanvasItem *item,
GimpDisplayShell *shell,
cairo_t *cr);
static GdkRegion * gimp_canvas_guide_get_extents (GimpCanvasItem *item,
GimpDisplayShell *shell);
G_DEFINE_TYPE (GimpCanvasGuide, gimp_canvas_guide, GIMP_TYPE_CANVAS_ITEM)
#define parent_class gimp_canvas_guide_parent_class
static void
gimp_canvas_guide_class_init (GimpCanvasGuideClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GimpCanvasItemClass *item_class = GIMP_CANVAS_ITEM_CLASS (klass);
object_class->set_property = gimp_canvas_guide_set_property;
object_class->get_property = gimp_canvas_guide_get_property;
item_class->draw = gimp_canvas_guide_draw;
item_class->get_extents = gimp_canvas_guide_get_extents;
g_object_class_install_property (object_class, PROP_ORIENTATION,
g_param_spec_enum ("orientation", NULL, NULL,
GIMP_TYPE_ORIENTATION_TYPE,
GIMP_ORIENTATION_HORIZONTAL,
GIMP_PARAM_READWRITE));
g_object_class_install_property (object_class, PROP_POSITION,
g_param_spec_int ("position", NULL, NULL,
-GIMP_MAX_IMAGE_SIZE,
GIMP_MAX_IMAGE_SIZE, 0,
GIMP_PARAM_READWRITE));
g_type_class_add_private (klass, sizeof (GimpCanvasGuidePrivate));
}
static void
gimp_canvas_guide_init (GimpCanvasGuide *guide)
{
}
static void
gimp_canvas_guide_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GimpCanvasGuidePrivate *private = GET_PRIVATE (object);
switch (property_id)
{
case PROP_ORIENTATION:
private->orientation = g_value_get_enum (value);
break;
case PROP_POSITION:
private->position = g_value_get_int (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_canvas_guide_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GimpCanvasGuidePrivate *private = GET_PRIVATE (object);
switch (property_id)
{
case PROP_ORIENTATION:
g_value_set_enum (value, private->orientation);
break;
case PROP_POSITION:
g_value_set_int (value, private->position);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_canvas_guide_transform (GimpCanvasItem *item,
GimpDisplayShell *shell,
gdouble *x1,
gdouble *y1,
gdouble *x2,
gdouble *y2)
{
GimpCanvasGuidePrivate *private = GET_PRIVATE (item);
GtkAllocation allocation;
gint x, y;
gtk_widget_get_allocation (shell->canvas, &allocation);
*x1 = 0;
*y1 = 0;
*x2 = allocation.width;
*y2 = allocation.height;
switch (private->orientation)
{
case GIMP_ORIENTATION_HORIZONTAL:
gimp_display_shell_transform_xy (shell, 0, private->position, &x, &y);
*y1 = *y2 = y + 0.5;
break;
case GIMP_ORIENTATION_VERTICAL:
gimp_display_shell_transform_xy (shell, private->position, 0, &x, &y);
*x1 = *x2 = x + 0.5;
break;
case GIMP_ORIENTATION_UNKNOWN:
return;
}
}
static void
gimp_canvas_guide_draw (GimpCanvasItem *item,
GimpDisplayShell *shell,
cairo_t *cr)
{
gdouble x1, y1;
gdouble x2, y2;
gimp_canvas_guide_transform (item, shell, &x1, &y1, &x2, &y2);
cairo_move_to (cr, x1, y1);
cairo_line_to (cr, x2, y2);
_gimp_canvas_item_stroke (item, shell, cr);
}
static GdkRegion *
gimp_canvas_guide_get_extents (GimpCanvasItem *item,
GimpDisplayShell *shell)
{
GdkRectangle rectangle;
gdouble x1, y1;
gdouble x2, y2;
gimp_canvas_guide_transform (item, shell, &x1, &y1, &x2, &y2);
rectangle.x = MIN (x1, x2) - 1.5;
rectangle.y = MIN (y1, y2) - 1.5;
rectangle.width = ABS (x2 - x1) + 3.0;
rectangle.height = ABS (y2 - y1) + 3.0;
return gdk_region_rectangle (&rectangle);
}
GimpCanvasItem *
gimp_canvas_guide_new (GimpOrientationType orientation,
gint position)
{
return g_object_new (GIMP_TYPE_CANVAS_GUIDE,
"orientation", orientation,
"position", position,
NULL);
}
/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpcanvasguide.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_GUIDE_H__
#define __GIMP_CANVAS_GUIDE_H__
#include "gimpcanvasitem.h"
#define GIMP_TYPE_CANVAS_GUIDE (gimp_canvas_guide_get_type ())
#define GIMP_CANVAS_GUIDE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_CANVAS_GUIDE, GimpCanvasGuide))
#define GIMP_CANVAS_GUIDE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_CANVAS_GUIDE, GimpCanvasGuideClass))
#define GIMP_IS_CANVAS_GUIDE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_CANVAS_GUIDE))
#define GIMP_IS_CANVAS_GUIDE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_CANVAS_GUIDE))
#define GIMP_CANVAS_GUIDE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GIMP_TYPE_CANVAS_GUIDE, GimpCanvasGuideClass))
typedef struct _GimpCanvasGuide GimpCanvasGuide;
typedef struct _GimpCanvasGuideClass GimpCanvasGuideClass;
struct _GimpCanvasGuide
{
GimpCanvasItem parent_instance;
};
struct _GimpCanvasGuideClass
{
GimpCanvasItemClass parent_class;
};
GType gimp_canvas_guide_get_type (void) G_GNUC_CONST;
GimpCanvasItem * gimp_canvas_guide_new (GimpOrientationType orientation,
gint position);
#endif /* __GIMP_CANVAS_GUIDE_H__ */
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