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app: add GimpCanvasHandle which draws tool handles

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Currently only a centered cross is implemented.
This commit is contained in:
Michael Natterer
2010-09-21 19:22:29 +02:00
parent b0d8ba5ffd
commit de2ae87047
3 changed files with 444 additions and 0 deletions
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2
app/display/Makefile.am
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@ -19,6 +19,8 @@ libappdisplay_a_sources = \
display-types.h \
gimpcanvas.c \
gimpcanvas.h \
gimpcanvashandle.c \
gimpcanvashandle.h \
gimpcanvasitem.c \
gimpcanvasitem.h \
gimpcanvasline.c \

382
app/display/gimpcanvashandle.c Normal file
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@ -0,0 +1,382 @@
/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpcanvashandle.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 "gimpcanvashandle.h"
#include "gimpdisplayshell.h"
#include "gimpdisplayshell-transform.h"
enum
{
PROP_0,
PROP_TYPE,
PROP_ANCHOR,
PROP_X,
PROP_Y,
PROP_WIDTH,
PROP_HEIGHT
};
typedef struct _GimpCanvasHandlePrivate GimpCanvasHandlePrivate;
struct _GimpCanvasHandlePrivate
{
GimpHandleType type;
GtkAnchorType anchor;
gdouble x;
gdouble y;
gint width;
gint height;
};
#define GET_PRIVATE(handle) \
G_TYPE_INSTANCE_GET_PRIVATE (handle, \
GIMP_TYPE_CANVAS_HANDLE, \
GimpCanvasHandlePrivate)
/* local function prototypes */
static void gimp_canvas_handle_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gimp_canvas_handle_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static void gimp_canvas_handle_draw (GimpCanvasItem *item,
GimpDisplayShell *shell,
cairo_t *cr);
static GdkRegion * gimp_canvas_handle_get_extents (GimpCanvasItem *item,
GimpDisplayShell *shell);
G_DEFINE_TYPE (GimpCanvasHandle, gimp_canvas_handle,
GIMP_TYPE_CANVAS_ITEM)
#define parent_class gimp_canvas_handle_parent_class
static void
gimp_canvas_handle_class_init (GimpCanvasHandleClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GimpCanvasItemClass *item_class = GIMP_CANVAS_ITEM_CLASS (klass);
object_class->set_property = gimp_canvas_handle_set_property;
object_class->get_property = gimp_canvas_handle_get_property;
item_class->draw = gimp_canvas_handle_draw;
item_class->get_extents = gimp_canvas_handle_get_extents;
g_object_class_install_property (object_class, PROP_TYPE,
g_param_spec_enum ("type", NULL, NULL,
GIMP_TYPE_HANDLE_TYPE,
GIMP_HANDLE_CROSS,
GIMP_PARAM_READWRITE));
g_object_class_install_property (object_class, PROP_ANCHOR,
g_param_spec_enum ("anchor", NULL, NULL,
GTK_TYPE_ANCHOR_TYPE,
GTK_ANCHOR_CENTER,
GIMP_PARAM_READWRITE));
g_object_class_install_property (object_class, PROP_X,
g_param_spec_double ("x", NULL, NULL,
-GIMP_MAX_IMAGE_SIZE,
GIMP_MAX_IMAGE_SIZE, 0,
GIMP_PARAM_READWRITE));
g_object_class_install_property (object_class, PROP_Y,
g_param_spec_double ("y", NULL, NULL,
-GIMP_MAX_IMAGE_SIZE,
GIMP_MAX_IMAGE_SIZE, 0,
GIMP_PARAM_READWRITE));
g_object_class_install_property (object_class, PROP_WIDTH,
g_param_spec_int ("width", NULL, NULL,
3, 1001, 7,
GIMP_PARAM_READWRITE));
g_object_class_install_property (object_class, PROP_HEIGHT,
g_param_spec_int ("height", NULL, NULL,
3, 1001, 7,
GIMP_PARAM_READWRITE));
g_type_class_add_private (klass, sizeof (GimpCanvasHandlePrivate));
}
static void
gimp_canvas_handle_init (GimpCanvasHandle *handle)
{
}
static void
gimp_canvas_handle_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GimpCanvasHandlePrivate *private = GET_PRIVATE (object);
switch (property_id)
{
case PROP_TYPE:
private->type = g_value_get_enum (value);
break;
case PROP_ANCHOR:
private->anchor = g_value_get_enum (value);
break;
case PROP_X:
private->x = g_value_get_double (value);
break;
case PROP_Y:
private->y = g_value_get_double (value);
break;
case PROP_WIDTH:
private->width = g_value_get_int (value);
break;
case PROP_HEIGHT:
private->height = g_value_get_int (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_canvas_handle_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GimpCanvasHandlePrivate *private = GET_PRIVATE (object);
switch (property_id)
{
case PROP_TYPE:
g_value_set_enum (value, private->type);
break;
case PROP_ANCHOR:
g_value_set_enum (value, private->anchor);
break;
case PROP_X:
g_value_set_double (value, private->x);
break;
case PROP_Y:
g_value_set_double (value, private->y);
break;
case PROP_WIDTH:
g_value_set_int (value, private->width);
break;
case PROP_HEIGHT:
g_value_set_int (value, private->height);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static inline void
gimp_canvas_handle_shift_to_center (GtkAnchorType anchor,
gdouble x,
gdouble y,
gint width,
gint height,
gdouble *shifted_x,
gdouble *shifted_y)
{
switch (anchor)
{
case GTK_ANCHOR_CENTER:
/* nothing, this is the default */
break;
case GTK_ANCHOR_NORTH:
y += height / 2;
break;
case GTK_ANCHOR_NORTH_WEST:
x += width / 2;
y += height / 2;
break;
case GTK_ANCHOR_NORTH_EAST:
x -= width / 2;
y += height / 2;
break;
case GTK_ANCHOR_SOUTH:
y -= height / 2;
break;
case GTK_ANCHOR_SOUTH_WEST:
x += width / 2;
y -= height / 2;
break;
case GTK_ANCHOR_SOUTH_EAST:
x -= width / 2;
y -= height / 2;
break;
case GTK_ANCHOR_WEST:
x += width / 2;
break;
case GTK_ANCHOR_EAST:
x -= width / 2;
break;
default:
break;
}
if (shifted_x)
*shifted_x = x;
if (shifted_y)
*shifted_y = y;
}
static void
gimp_canvas_handle_transform (GimpCanvasItem *item,
GimpDisplayShell *shell,
gdouble *x,
gdouble *y)
{
GimpCanvasHandlePrivate *private = GET_PRIVATE (item);
gimp_display_shell_transform_xy_f (shell,
private->x, private->y,
x, y,
FALSE);
switch (private->type)
{
case GIMP_HANDLE_SQUARE:
break;
case GIMP_HANDLE_FILLED_SQUARE:
break;
case GIMP_HANDLE_CIRCLE:
case GIMP_HANDLE_FILLED_CIRCLE:
case GIMP_HANDLE_CROSS:
gimp_canvas_handle_shift_to_center (private->anchor,
*x, *y,
private->width,
private->height,
x, y);
break;
default:
break;
}
*x = PROJ_ROUND (*x) + 0.5;
*y = PROJ_ROUND (*y) + 0.5;
}
static void
gimp_canvas_handle_draw (GimpCanvasItem *item,
GimpDisplayShell *shell,
cairo_t *cr)
{
GimpCanvasHandlePrivate *private = GET_PRIVATE (item);
gdouble x, y;
gimp_canvas_handle_transform (item, shell, &x, &y);
switch (private->type)
{
case GIMP_HANDLE_SQUARE:
break;
case GIMP_HANDLE_FILLED_SQUARE:
break;
case GIMP_HANDLE_CIRCLE:
break;
case GIMP_HANDLE_FILLED_CIRCLE:
break;
case GIMP_HANDLE_CROSS:
cairo_move_to (cr, x - private->width / 2, y);
cairo_line_to (cr, x + private->width / 2, y);
cairo_move_to (cr, x, y - private->height / 2);
cairo_line_to (cr, x, y + private->height / 2);
_gimp_canvas_item_set_extents (item,
x - private->width / 2 - 1.5,
y - private->height / 2 - 1.5,
private->width + 3.0,
private->height + 3.0);
_gimp_canvas_item_stroke (item, shell, cr);
break;
default:
break;
}
}
static GdkRegion *
gimp_canvas_handle_get_extents (GimpCanvasItem *item,
GimpDisplayShell *shell)
{
return GIMP_CANVAS_ITEM_CLASS (parent_class)->get_extents (item, shell);
}
GimpCanvasItem *
gimp_canvas_handle_new (GimpHandleType type,
GtkAnchorType anchor,
gdouble x,
gdouble y,
gint width,
gint height)
{
return g_object_new (GIMP_TYPE_CANVAS_HANDLE,
"type", type,
"anchor", anchor,
"x", x,
"y", y,
"width", width,
"height", height,
NULL);
}

60
app/display/gimpcanvashandle.h Normal file
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@ -0,0 +1,60 @@
/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpcanvashandle.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_HANDLE_H__
#define __GIMP_CANVAS_HANDLE_H__
#include "gimpcanvasitem.h"
#define GIMP_TYPE_CANVAS_HANDLE (gimp_canvas_handle_get_type ())
#define GIMP_CANVAS_HANDLE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_CANVAS_HANDLE, GimpCanvasHandle))
#define GIMP_CANVAS_HANDLE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_CANVAS_HANDLE, GimpCanvasHandleClass))
#define GIMP_IS_CANVAS_HANDLE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_CANVAS_HANDLE))
#define GIMP_IS_CANVAS_HANDLE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_CANVAS_HANDLE))
#define GIMP_CANVAS_HANDLE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GIMP_TYPE_CANVAS_HANDLE, GimpCanvasHandleClass))
typedef struct _GimpCanvasHandle GimpCanvasHandle;
typedef struct _GimpCanvasHandleClass GimpCanvasHandleClass;
struct _GimpCanvasHandle
{
GimpCanvasItem parent_instance;
};
struct _GimpCanvasHandleClass
{
GimpCanvasItemClass parent_class;
};
GType gimp_canvas_handle_get_type (void) G_GNUC_CONST;
GimpCanvasItem * gimp_canvas_handle_new (GimpHandleType type,
GtkAnchorType anchor,
gdouble x,
gdouble y,
gint width,
gint height);
#endif /* __GIMP_CANVAS_HANDLE_H__ */