mirror of https://github.com/GNOME/gimp.git
app: add a guide line canvas item class
This commit is contained in:
Michael Natterer
parent
612aee9f33
commit
8dbab53fae
|
|
@ -19,6 +19,8 @@ libappdisplay_a_sources = \
|
|||
display-types.h \
|
||||
gimpcanvas.c \
|
||||
gimpcanvas.h \
|
||||
gimpcanvasguide.c \
|
||||
gimpcanvasguide.h \
|
||||
gimpcanvashandle.c \
|
||||
gimpcanvashandle.h \
|
||||
gimpcanvasitem.c \
|
||||
|
|
|
|||
|
|
@ -0,0 +1,236 @@
|
|||
/* 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);
|
||||
}
|
||||
|
|
@ -0,0 +1,56 @@
|
|||
/* 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__ */
|
||||
Loading…
Reference in New Issue