gtk2/gtk/gtkcellrendererpixbuf.c
2005-03-09 06:15:13 +00:00

612 lines
18 KiB
C

/* gtkcellrendererpixbuf.c
* Copyright (C) 2000 Red Hat, Inc., Jonathan Blandford <jrb@redhat.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <config.h>
#include <stdlib.h>
#include "gtkalias.h"
#include "gtkcellrendererpixbuf.h"
#include "gtkiconfactory.h"
#include "gtkintl.h"
static void gtk_cell_renderer_pixbuf_get_property (GObject *object,
guint param_id,
GValue *value,
GParamSpec *pspec);
static void gtk_cell_renderer_pixbuf_set_property (GObject *object,
guint param_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_cell_renderer_pixbuf_init (GtkCellRendererPixbuf *celltext);
static void gtk_cell_renderer_pixbuf_class_init (GtkCellRendererPixbufClass *class);
static void gtk_cell_renderer_pixbuf_finalize (GObject *object);
static void gtk_cell_renderer_pixbuf_create_stock_pixbuf (GtkCellRendererPixbuf *cellpixbuf,
GtkWidget *widget);
static void gtk_cell_renderer_pixbuf_get_size (GtkCellRenderer *cell,
GtkWidget *widget,
GdkRectangle *rectangle,
gint *x_offset,
gint *y_offset,
gint *width,
gint *height);
static void gtk_cell_renderer_pixbuf_render (GtkCellRenderer *cell,
GdkDrawable *window,
GtkWidget *widget,
GdkRectangle *background_area,
GdkRectangle *cell_area,
GdkRectangle *expose_area,
GtkCellRendererState flags);
enum {
PROP_ZERO,
PROP_PIXBUF,
PROP_PIXBUF_EXPANDER_OPEN,
PROP_PIXBUF_EXPANDER_CLOSED,
PROP_STOCK_ID,
PROP_STOCK_SIZE,
PROP_STOCK_DETAIL,
PROP_FOLLOW_STATE
};
static gpointer parent_class;
#define GTK_CELL_RENDERER_PIXBUF_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GTK_TYPE_CELL_RENDERER_PIXBUF, GtkCellRendererPixbufPrivate))
typedef struct _GtkCellRendererPixbufPrivate GtkCellRendererPixbufPrivate;
struct _GtkCellRendererPixbufPrivate
{
gchar *stock_id;
GtkIconSize stock_size;
gchar *stock_detail;
gboolean follow_state;
};
GType
gtk_cell_renderer_pixbuf_get_type (void)
{
static GType cell_pixbuf_type = 0;
if (!cell_pixbuf_type)
{
static const GTypeInfo cell_pixbuf_info =
{
sizeof (GtkCellRendererPixbufClass),
NULL, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc) gtk_cell_renderer_pixbuf_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GtkCellRendererPixbuf),
0, /* n_preallocs */
(GInstanceInitFunc) gtk_cell_renderer_pixbuf_init,
};
cell_pixbuf_type =
g_type_register_static (GTK_TYPE_CELL_RENDERER, "GtkCellRendererPixbuf",
&cell_pixbuf_info, 0);
}
return cell_pixbuf_type;
}
static void
gtk_cell_renderer_pixbuf_init (GtkCellRendererPixbuf *cellpixbuf)
{
GtkCellRendererPixbufPrivate *priv;
priv = GTK_CELL_RENDERER_PIXBUF_GET_PRIVATE (cellpixbuf);
priv->stock_size = GTK_ICON_SIZE_MENU;
}
static void
gtk_cell_renderer_pixbuf_class_init (GtkCellRendererPixbufClass *class)
{
GObjectClass *object_class = G_OBJECT_CLASS (class);
GtkCellRendererClass *cell_class = GTK_CELL_RENDERER_CLASS (class);
parent_class = g_type_class_peek_parent (class);
object_class->finalize = gtk_cell_renderer_pixbuf_finalize;
object_class->get_property = gtk_cell_renderer_pixbuf_get_property;
object_class->set_property = gtk_cell_renderer_pixbuf_set_property;
cell_class->get_size = gtk_cell_renderer_pixbuf_get_size;
cell_class->render = gtk_cell_renderer_pixbuf_render;
g_object_class_install_property (object_class,
PROP_PIXBUF,
g_param_spec_object ("pixbuf",
P_("Pixbuf Object"),
P_("The pixbuf to render"),
GDK_TYPE_PIXBUF,
G_PARAM_READABLE |
G_PARAM_WRITABLE));
g_object_class_install_property (object_class,
PROP_PIXBUF_EXPANDER_OPEN,
g_param_spec_object ("pixbuf-expander-open",
P_("Pixbuf Expander Open"),
P_("Pixbuf for open expander"),
GDK_TYPE_PIXBUF,
G_PARAM_READABLE |
G_PARAM_WRITABLE));
g_object_class_install_property (object_class,
PROP_PIXBUF_EXPANDER_CLOSED,
g_param_spec_object ("pixbuf-expander-closed",
P_("Pixbuf Expander Closed"),
P_("Pixbuf for closed expander"),
GDK_TYPE_PIXBUF,
G_PARAM_READABLE |
G_PARAM_WRITABLE));
g_object_class_install_property (object_class,
PROP_STOCK_ID,
g_param_spec_string ("stock-id",
P_("Stock ID"),
P_("The stock ID of the stock icon to render"),
NULL,
G_PARAM_READWRITE));
g_object_class_install_property (object_class,
PROP_STOCK_SIZE,
g_param_spec_uint ("stock-size",
P_("Size"),
P_("The GtkIconSize value that specifies the size of the rendered icon"),
0,
G_MAXUINT,
GTK_ICON_SIZE_MENU,
G_PARAM_READWRITE));
g_object_class_install_property (object_class,
PROP_STOCK_DETAIL,
g_param_spec_string ("stock-detail",
P_("Detail"),
P_("Render detail to pass to the theme engine"),
NULL,
G_PARAM_READWRITE));
/**
* GtkCellRendererPixbuf:follow-state:
*
* Specifies whether the rendered pixbuf should be colorized
* according to the #GtkCellRendererState.
*
* Since: 2.8
*/
g_object_class_install_property (object_class,
PROP_FOLLOW_STATE,
g_param_spec_boolean ("follow-state",
P_("Follow State"),
P_("Whether the rendered pixbuf should be "
"colorized according to the state"),
FALSE,
G_PARAM_READWRITE));
g_type_class_add_private (object_class, sizeof (GtkCellRendererPixbufPrivate));
}
static void
gtk_cell_renderer_pixbuf_finalize (GObject *object)
{
GtkCellRendererPixbuf *cellpixbuf = GTK_CELL_RENDERER_PIXBUF (object);
GtkCellRendererPixbufPrivate *priv;
priv = GTK_CELL_RENDERER_PIXBUF_GET_PRIVATE (object);
if (cellpixbuf->pixbuf)
g_object_unref (cellpixbuf->pixbuf);
if (priv->stock_id)
g_free (priv->stock_id);
if (priv->stock_detail)
g_free (priv->stock_detail);
(* G_OBJECT_CLASS (parent_class)->finalize) (object);
}
static void
gtk_cell_renderer_pixbuf_get_property (GObject *object,
guint param_id,
GValue *value,
GParamSpec *pspec)
{
GtkCellRendererPixbuf *cellpixbuf = GTK_CELL_RENDERER_PIXBUF (object);
GtkCellRendererPixbufPrivate *priv;
priv = GTK_CELL_RENDERER_PIXBUF_GET_PRIVATE (object);
switch (param_id)
{
case PROP_PIXBUF:
g_value_set_object (value,
cellpixbuf->pixbuf ? G_OBJECT (cellpixbuf->pixbuf) : NULL);
break;
case PROP_PIXBUF_EXPANDER_OPEN:
g_value_set_object (value,
cellpixbuf->pixbuf_expander_open ? G_OBJECT (cellpixbuf->pixbuf_expander_open) : NULL);
break;
case PROP_PIXBUF_EXPANDER_CLOSED:
g_value_set_object (value,
cellpixbuf->pixbuf_expander_closed ? G_OBJECT (cellpixbuf->pixbuf_expander_closed) : NULL);
break;
case PROP_STOCK_ID:
g_value_set_string (value, priv->stock_id);
break;
case PROP_STOCK_SIZE:
g_value_set_uint (value, priv->stock_size);
break;
case PROP_STOCK_DETAIL:
g_value_set_string (value, priv->stock_detail);
break;
case PROP_FOLLOW_STATE:
g_value_set_boolean (value, priv->follow_state);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
break;
}
}
static void
gtk_cell_renderer_pixbuf_set_property (GObject *object,
guint param_id,
const GValue *value,
GParamSpec *pspec)
{
GdkPixbuf *pixbuf;
GtkCellRendererPixbuf *cellpixbuf = GTK_CELL_RENDERER_PIXBUF (object);
GtkCellRendererPixbufPrivate *priv;
priv = GTK_CELL_RENDERER_PIXBUF_GET_PRIVATE (object);
switch (param_id)
{
case PROP_PIXBUF:
pixbuf = (GdkPixbuf*) g_value_get_object (value);
if (pixbuf)
g_object_ref (pixbuf);
if (cellpixbuf->pixbuf)
g_object_unref (cellpixbuf->pixbuf);
cellpixbuf->pixbuf = pixbuf;
break;
case PROP_PIXBUF_EXPANDER_OPEN:
pixbuf = (GdkPixbuf*) g_value_get_object (value);
if (pixbuf)
g_object_ref (pixbuf);
if (cellpixbuf->pixbuf_expander_open)
g_object_unref (cellpixbuf->pixbuf_expander_open);
cellpixbuf->pixbuf_expander_open = pixbuf;
break;
case PROP_PIXBUF_EXPANDER_CLOSED:
pixbuf = (GdkPixbuf*) g_value_get_object (value);
if (pixbuf)
g_object_ref (pixbuf);
if (cellpixbuf->pixbuf_expander_closed)
g_object_unref (cellpixbuf->pixbuf_expander_closed);
cellpixbuf->pixbuf_expander_closed = pixbuf;
break;
case PROP_STOCK_ID:
if (priv->stock_id)
{
if (cellpixbuf->pixbuf)
{
g_object_unref (cellpixbuf->pixbuf);
cellpixbuf->pixbuf = NULL;
}
g_free (priv->stock_id);
}
priv->stock_id = g_strdup (g_value_get_string (value));
break;
case PROP_STOCK_SIZE:
priv->stock_size = g_value_get_uint (value);
break;
case PROP_STOCK_DETAIL:
if (priv->stock_detail)
g_free (priv->stock_detail);
priv->stock_detail = g_strdup (g_value_get_string (value));
break;
case PROP_FOLLOW_STATE:
priv->follow_state = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
break;
}
if (cellpixbuf->pixbuf && priv->stock_id)
{
g_object_unref (cellpixbuf->pixbuf);
cellpixbuf->pixbuf = NULL;
}
}
/**
* gtk_cell_renderer_pixbuf_new:
*
* Creates a new #GtkCellRendererPixbuf. Adjust rendering
* parameters using object properties. Object properties can be set
* globally (with g_object_set()). Also, with #GtkTreeViewColumn, you
* can bind a property to a value in a #GtkTreeModel. For example, you
* can bind the "pixbuf" property on the cell renderer to a pixbuf value
* in the model, thus rendering a different image in each row of the
* #GtkTreeView.
*
* Return value: the new cell renderer
**/
GtkCellRenderer *
gtk_cell_renderer_pixbuf_new (void)
{
return g_object_new (GTK_TYPE_CELL_RENDERER_PIXBUF, NULL);
}
static void
gtk_cell_renderer_pixbuf_create_stock_pixbuf (GtkCellRendererPixbuf *cellpixbuf,
GtkWidget *widget)
{
GtkCellRendererPixbufPrivate *priv;
priv = GTK_CELL_RENDERER_PIXBUF_GET_PRIVATE (cellpixbuf);
if (cellpixbuf->pixbuf)
g_object_unref (cellpixbuf->pixbuf);
cellpixbuf->pixbuf = gtk_widget_render_icon (widget,
priv->stock_id,
priv->stock_size,
priv->stock_detail);
}
static GdkPixbuf *
create_colorized_pixbuf (GdkPixbuf *src,
GdkColor *new_color)
{
gint i, j;
gint width, height, has_alpha, src_row_stride, dst_row_stride;
gint red_value, green_value, blue_value;
guchar *target_pixels;
guchar *original_pixels;
guchar *pixsrc;
guchar *pixdest;
GdkPixbuf *dest;
red_value = new_color->red / 255.0;
green_value = new_color->green / 255.0;
blue_value = new_color->blue / 255.0;
dest = gdk_pixbuf_new (gdk_pixbuf_get_colorspace (src),
gdk_pixbuf_get_has_alpha (src),
gdk_pixbuf_get_bits_per_sample (src),
gdk_pixbuf_get_width (src),
gdk_pixbuf_get_height (src));
has_alpha = gdk_pixbuf_get_has_alpha (src);
width = gdk_pixbuf_get_width (src);
height = gdk_pixbuf_get_height (src);
src_row_stride = gdk_pixbuf_get_rowstride (src);
dst_row_stride = gdk_pixbuf_get_rowstride (dest);
target_pixels = gdk_pixbuf_get_pixels (dest);
original_pixels = gdk_pixbuf_get_pixels (src);
for (i = 0; i < height; i++) {
pixdest = target_pixels + i*dst_row_stride;
pixsrc = original_pixels + i*src_row_stride;
for (j = 0; j < width; j++) {
*pixdest++ = (*pixsrc++ * red_value) >> 8;
*pixdest++ = (*pixsrc++ * green_value) >> 8;
*pixdest++ = (*pixsrc++ * blue_value) >> 8;
if (has_alpha) {
*pixdest++ = *pixsrc++;
}
}
}
return dest;
}
static void
gtk_cell_renderer_pixbuf_get_size (GtkCellRenderer *cell,
GtkWidget *widget,
GdkRectangle *cell_area,
gint *x_offset,
gint *y_offset,
gint *width,
gint *height)
{
GtkCellRendererPixbuf *cellpixbuf = (GtkCellRendererPixbuf *) cell;
GtkCellRendererPixbufPrivate *priv;
gint pixbuf_width = 0;
gint pixbuf_height = 0;
gint calc_width;
gint calc_height;
priv = GTK_CELL_RENDERER_PIXBUF_GET_PRIVATE (cell);
if (!cellpixbuf->pixbuf && priv->stock_id)
gtk_cell_renderer_pixbuf_create_stock_pixbuf (cellpixbuf, widget);
if (cellpixbuf->pixbuf)
{
pixbuf_width = gdk_pixbuf_get_width (cellpixbuf->pixbuf);
pixbuf_height = gdk_pixbuf_get_height (cellpixbuf->pixbuf);
}
if (cellpixbuf->pixbuf_expander_open)
{
pixbuf_width = MAX (pixbuf_width, gdk_pixbuf_get_width (cellpixbuf->pixbuf_expander_open));
pixbuf_height = MAX (pixbuf_height, gdk_pixbuf_get_height (cellpixbuf->pixbuf_expander_open));
}
if (cellpixbuf->pixbuf_expander_closed)
{
pixbuf_width = MAX (pixbuf_width, gdk_pixbuf_get_width (cellpixbuf->pixbuf_expander_closed));
pixbuf_height = MAX (pixbuf_height, gdk_pixbuf_get_height (cellpixbuf->pixbuf_expander_closed));
}
calc_width = (gint) cell->xpad * 2 + pixbuf_width;
calc_height = (gint) cell->ypad * 2 + pixbuf_height;
if (x_offset) *x_offset = 0;
if (y_offset) *y_offset = 0;
if (cell_area && pixbuf_width > 0 && pixbuf_height > 0)
{
if (x_offset)
{
*x_offset = (((gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL) ?
1.0 - cell->xalign : cell->xalign) *
(cell_area->width - calc_width - 2 * cell->xpad));
*x_offset = MAX (*x_offset, 0) + cell->xpad;
}
if (y_offset)
{
*y_offset = (cell->yalign *
(cell_area->height - calc_height - 2 * cell->ypad));
*y_offset = MAX (*y_offset, 0) + cell->ypad;
}
}
if (width)
*width = calc_width;
if (height)
*height = calc_height;
}
static void
gtk_cell_renderer_pixbuf_render (GtkCellRenderer *cell,
GdkWindow *window,
GtkWidget *widget,
GdkRectangle *background_area,
GdkRectangle *cell_area,
GdkRectangle *expose_area,
GtkCellRendererState flags)
{
GtkCellRendererPixbuf *cellpixbuf = (GtkCellRendererPixbuf *) cell;
GtkCellRendererPixbufPrivate *priv;
GdkPixbuf *pixbuf;
GdkPixbuf *invisible = NULL;
GdkPixbuf *colorized = NULL;
GdkRectangle pix_rect;
GdkRectangle draw_rect;
priv = GTK_CELL_RENDERER_PIXBUF_GET_PRIVATE (cell);
gtk_cell_renderer_pixbuf_get_size (cell, widget, cell_area,
&pix_rect.x,
&pix_rect.y,
&pix_rect.width,
&pix_rect.height);
pix_rect.x += cell_area->x;
pix_rect.y += cell_area->y;
pix_rect.width -= cell->xpad * 2;
pix_rect.height -= cell->ypad * 2;
if (!gdk_rectangle_intersect (cell_area, &pix_rect, &draw_rect) ||
!gdk_rectangle_intersect (expose_area, &draw_rect, &draw_rect))
return;
pixbuf = cellpixbuf->pixbuf;
if (cell->is_expander)
{
if (cell->is_expanded &&
cellpixbuf->pixbuf_expander_open != NULL)
pixbuf = cellpixbuf->pixbuf_expander_open;
else if (!cell->is_expanded &&
cellpixbuf->pixbuf_expander_closed != NULL)
pixbuf = cellpixbuf->pixbuf_expander_closed;
}
if (!pixbuf)
return;
if (GTK_WIDGET_STATE (widget) == GTK_STATE_INSENSITIVE || !cell->sensitive)
{
GtkIconSource *source;
source = gtk_icon_source_new ();
gtk_icon_source_set_pixbuf (source, pixbuf);
/* The size here is arbitrary; since size isn't
* wildcarded in the source, it isn't supposed to be
* scaled by the engine function
*/
gtk_icon_source_set_size (source, GTK_ICON_SIZE_SMALL_TOOLBAR);
gtk_icon_source_set_size_wildcarded (source, FALSE);
invisible = gtk_style_render_icon (widget->style,
source,
gtk_widget_get_direction (widget),
GTK_STATE_INSENSITIVE,
/* arbitrary */
(GtkIconSize)-1,
widget,
"gtkcellrendererpixbuf");
gtk_icon_source_free (source);
pixbuf = invisible;
}
else if (priv->follow_state &&
(flags & (GTK_CELL_RENDERER_SELECTED|GTK_CELL_RENDERER_PRELIT)) != 0)
{
GtkStateType state;
if ((flags & GTK_CELL_RENDERER_SELECTED) != 0)
{
if (GTK_WIDGET_HAS_FOCUS (widget))
state = GTK_STATE_SELECTED;
else
state = GTK_STATE_ACTIVE;
}
else
state = GTK_STATE_PRELIGHT;
colorized = create_colorized_pixbuf (pixbuf,
&widget->style->base[state]);
pixbuf = colorized;
}
gdk_draw_pixbuf (window,
widget->style->black_gc,
pixbuf,
/* pixbuf 0, 0 is at pix_rect.x, pix_rect.y */
draw_rect.x - pix_rect.x,
draw_rect.y - pix_rect.y,
draw_rect.x,
draw_rect.y,
draw_rect.width,
draw_rect.height,
GDK_RGB_DITHER_NORMAL,
0, 0);
if (invisible)
g_object_unref (invisible);
if (colorized)
g_object_unref (colorized);
}