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gtk2/gtk/gtkcellrendererpixbuf.c
Benjamin Otte fa3b803de9 cellrendererpixbuf: Don't eat states 
Even when not following states, blacklist the states we don't follow
instead of whitelisting the ones we do. This way, we don't accidentally
eat new ones like the text direction flags.

Fixes a bug where text direction wasn't available when rendering stock
items.

https://bugzilla.gnome.org/show_bug.cgi?id=702423
2013-09-05 18:48:47 +02:00

573 lines
18 KiB
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/* 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, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <stdlib.h>
#include <cairo-gobject.h>
#include "gtkcellrendererpixbuf.h"
#include "deprecated/gtkiconfactory.h"
#include "gtkiconhelperprivate.h"
#include "gtkicontheme.h"
#include "gtkintl.h"
#include "gtkprivate.h"
#include "a11y/gtkimagecellaccessible.h"
/**
* SECTION:gtkcellrendererpixbuf
* @Short_description: Renders a pixbuf in a cell
* @Title: GtkCellRendererPixbuf
*
* A #GtkCellRendererPixbuf can be used to render an image in a cell. It allows
* to render either a given #GdkPixbuf (set via the
* #GtkCellRendererPixbuf:pixbuf property) or a named icon (set via the
* #GtkCellRendererPixbuf:icon-name property).
*
* To support the tree view, #GtkCellRendererPixbuf also supports rendering two
* alternative pixbufs, when the #GtkCellRenderer:is-expander property is %TRUE.
* If the #GtkCellRenderer:is-expanded property is %TRUE and the
* #GtkCellRendererPixbuf:pixbuf-expander-open property is set to a pixbuf, it
* renders that pixbuf, if the #GtkCellRenderer:is-expanded property is %FALSE
* and the #GtkCellRendererPixbuf:pixbuf-expander-closed property is set to a
* pixbuf, it renders that one.
*/
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_get_size (GtkCellRenderer *cell,
GtkWidget *widget,
const GdkRectangle *rectangle,
gint *x_offset,
gint *y_offset,
gint *width,
gint *height);
static void gtk_cell_renderer_pixbuf_render (GtkCellRenderer *cell,
cairo_t *cr,
GtkWidget *widget,
const GdkRectangle *background_area,
const GdkRectangle *cell_area,
GtkCellRendererState flags);
enum {
PROP_0,
PROP_PIXBUF,
PROP_PIXBUF_EXPANDER_OPEN,
PROP_PIXBUF_EXPANDER_CLOSED,
PROP_SURFACE,
PROP_STOCK_ID,
PROP_STOCK_SIZE,
PROP_STOCK_DETAIL,
PROP_FOLLOW_STATE,
PROP_ICON_NAME,
PROP_GICON
};
struct _GtkCellRendererPixbufPrivate
{
GtkIconHelper *icon_helper;
GtkIconSize icon_size;
GdkPixbuf *pixbuf_expander_open;
GdkPixbuf *pixbuf_expander_closed;
gboolean follow_state;
gchar *stock_detail;
};
G_DEFINE_TYPE_WITH_PRIVATE (GtkCellRendererPixbuf, gtk_cell_renderer_pixbuf, GTK_TYPE_CELL_RENDERER)
static void
gtk_cell_renderer_pixbuf_init (GtkCellRendererPixbuf *cellpixbuf)
{
GtkCellRendererPixbufPrivate *priv;
cellpixbuf->priv = gtk_cell_renderer_pixbuf_get_instance_private (cellpixbuf);
priv = cellpixbuf->priv;
priv->icon_helper = _gtk_icon_helper_new ();
priv->icon_size = GTK_ICON_SIZE_MENU;
}
static void
gtk_cell_renderer_pixbuf_finalize (GObject *object)
{
GtkCellRendererPixbuf *cellpixbuf = GTK_CELL_RENDERER_PIXBUF (object);
GtkCellRendererPixbufPrivate *priv = cellpixbuf->priv;
g_clear_object (&priv->icon_helper);
if (priv->pixbuf_expander_open)
g_object_unref (priv->pixbuf_expander_open);
if (priv->pixbuf_expander_closed)
g_object_unref (priv->pixbuf_expander_closed);
g_free (priv->stock_detail);
G_OBJECT_CLASS (gtk_cell_renderer_pixbuf_parent_class)->finalize (object);
}
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);
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,
GTK_PARAM_READWRITE));
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,
GTK_PARAM_READWRITE));
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,
GTK_PARAM_READWRITE));
g_object_class_install_property (object_class,
PROP_SURFACE,
g_param_spec_boxed ("surface",
P_("surface"),
P_("The surface to render"),
CAIRO_GOBJECT_TYPE_SURFACE,
GTK_PARAM_READWRITE));
/**
* GtkCellRendererPixbuf:stock-id:
*
* Deprecated: 3.10: Use #GtkCellRendererPixbuf:icon-name instead.
*/
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,
GTK_PARAM_READWRITE | G_PARAM_DEPRECATED));
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,
GTK_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,
GTK_PARAM_READWRITE));
/**
* GtkCellRendererPixbuf:icon-name:
*
* The name of the themed icon to display.
* This property only has an effect if not overridden by "stock_id"
* or "pixbuf" properties.
*
* Since: 2.8
*/
g_object_class_install_property (object_class,
PROP_ICON_NAME,
g_param_spec_string ("icon-name",
P_("Icon Name"),
P_("The name of the icon from the icon theme"),
NULL,
GTK_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,
GTK_PARAM_READWRITE));
/**
* GtkCellRendererPixbuf:gicon:
*
* The GIcon representing the icon to display.
* If the icon theme is changed, the image will be updated
* automatically.
*
* Since: 2.14
*/
g_object_class_install_property (object_class,
PROP_GICON,
g_param_spec_object ("gicon",
P_("Icon"),
P_("The GIcon being displayed"),
G_TYPE_ICON,
GTK_PARAM_READWRITE));
gtk_cell_renderer_class_set_accessible_type (cell_class, GTK_TYPE_IMAGE_CELL_ACCESSIBLE);
}
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 = cellpixbuf->priv;
switch (param_id)
{
case PROP_PIXBUF:
g_value_set_object (value, _gtk_icon_helper_peek_pixbuf (priv->icon_helper));
break;
case PROP_PIXBUF_EXPANDER_OPEN:
g_value_set_object (value, priv->pixbuf_expander_open);
break;
case PROP_PIXBUF_EXPANDER_CLOSED:
g_value_set_object (value, priv->pixbuf_expander_closed);
break;
case PROP_SURFACE:
g_value_set_boxed (value, _gtk_icon_helper_peek_surface (priv->icon_helper));
break;
case PROP_STOCK_ID:
g_value_set_string (value, _gtk_icon_helper_get_stock_id (priv->icon_helper));
break;
case PROP_STOCK_SIZE:
g_value_set_uint (value, priv->icon_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;
case PROP_ICON_NAME:
g_value_set_string (value, _gtk_icon_helper_get_icon_name (priv->icon_helper));
break;
case PROP_GICON:
g_value_set_object (value, _gtk_icon_helper_peek_gicon (priv->icon_helper));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
break;
}
}
static void
gtk_cell_renderer_pixbuf_reset (GtkCellRendererPixbuf *cellpixbuf)
{
GtkCellRendererPixbufPrivate *priv = cellpixbuf->priv;
GtkImageType storage_type = _gtk_icon_helper_get_storage_type (priv->icon_helper);
switch (storage_type)
{
case GTK_IMAGE_SURFACE:
g_object_notify (G_OBJECT (cellpixbuf), "surface");
break;
case GTK_IMAGE_PIXBUF:
g_object_notify (G_OBJECT (cellpixbuf), "pixbuf");
break;
case GTK_IMAGE_STOCK:
g_object_notify (G_OBJECT (cellpixbuf), "stock-id");
break;
case GTK_IMAGE_ICON_NAME:
g_object_notify (G_OBJECT (cellpixbuf), "icon-name");
break;
case GTK_IMAGE_GICON:
g_object_notify (G_OBJECT (cellpixbuf), "gicon");
break;
case GTK_IMAGE_EMPTY:
default:
break;
}
_gtk_icon_helper_clear (priv->icon_helper);
}
static void
gtk_cell_renderer_pixbuf_set_property (GObject *object,
guint param_id,
const GValue *value,
GParamSpec *pspec)
{
GtkCellRendererPixbuf *cellpixbuf = GTK_CELL_RENDERER_PIXBUF (object);
GtkCellRendererPixbufPrivate *priv = cellpixbuf->priv;
switch (param_id)
{
case PROP_PIXBUF:
gtk_cell_renderer_pixbuf_reset (cellpixbuf);
_gtk_icon_helper_set_pixbuf (priv->icon_helper, g_value_get_object (value));
break;
case PROP_PIXBUF_EXPANDER_OPEN:
if (priv->pixbuf_expander_open)
g_object_unref (priv->pixbuf_expander_open);
priv->pixbuf_expander_open = (GdkPixbuf*) g_value_dup_object (value);
break;
case PROP_PIXBUF_EXPANDER_CLOSED:
if (priv->pixbuf_expander_closed)
g_object_unref (priv->pixbuf_expander_closed);
priv->pixbuf_expander_closed = (GdkPixbuf*) g_value_dup_object (value);
break;
case PROP_SURFACE:
gtk_cell_renderer_pixbuf_reset (cellpixbuf);
_gtk_icon_helper_set_surface (priv->icon_helper, g_value_get_boxed (value));
break;
case PROP_STOCK_ID:
gtk_cell_renderer_pixbuf_reset (cellpixbuf);
_gtk_icon_helper_set_stock_id (priv->icon_helper, g_value_get_string (value), priv->icon_size);
break;
case PROP_STOCK_SIZE:
priv->icon_size = g_value_get_uint (value);
_gtk_icon_helper_set_icon_size (priv->icon_helper, priv->icon_size);
break;
case PROP_STOCK_DETAIL:
g_free (priv->stock_detail);
priv->stock_detail = g_value_dup_string (value);
break;
case PROP_ICON_NAME:
gtk_cell_renderer_pixbuf_reset (cellpixbuf);
_gtk_icon_helper_set_icon_name (priv->icon_helper, g_value_get_string (value), priv->icon_size);
break;
case PROP_FOLLOW_STATE:
priv->follow_state = g_value_get_boolean (value);
break;
case PROP_GICON:
gtk_cell_renderer_pixbuf_reset (cellpixbuf);
_gtk_icon_helper_set_gicon (priv->icon_helper, g_value_get_object (value), priv->icon_size);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
break;
}
}
/**
* 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_get_size (GtkCellRenderer *cell,
GtkWidget *widget,
const GdkRectangle *cell_area,
gint *x_offset,
gint *y_offset,
gint *width,
gint *height)
{
GtkCellRendererPixbuf *cellpixbuf = (GtkCellRendererPixbuf *) cell;
GtkCellRendererPixbufPrivate *priv = cellpixbuf->priv;
gint pixbuf_width = 0;
gint pixbuf_height = 0;
gint calc_width;
gint calc_height;
gint xpad, ypad;
GtkStyleContext *context;
context = gtk_widget_get_style_context (widget);
gtk_style_context_save (context);
gtk_style_context_add_class (context, GTK_STYLE_CLASS_IMAGE);
if (!_gtk_icon_helper_get_is_empty (priv->icon_helper))
_gtk_icon_helper_get_size (priv->icon_helper,
gtk_widget_get_style_context (widget),
&pixbuf_width, &pixbuf_height);
gtk_style_context_restore (context);
if (priv->pixbuf_expander_open)
{
pixbuf_width = MAX (pixbuf_width, gdk_pixbuf_get_width (priv->pixbuf_expander_open));
pixbuf_height = MAX (pixbuf_height, gdk_pixbuf_get_height (priv->pixbuf_expander_open));
}
if (priv->pixbuf_expander_closed)
{
pixbuf_width = MAX (pixbuf_width, gdk_pixbuf_get_width (priv->pixbuf_expander_closed));
pixbuf_height = MAX (pixbuf_height, gdk_pixbuf_get_height (priv->pixbuf_expander_closed));
}
gtk_cell_renderer_get_padding (cell, &xpad, &ypad);
calc_width = (gint) xpad * 2 + pixbuf_width;
calc_height = (gint) ypad * 2 + pixbuf_height;
if (cell_area && pixbuf_width > 0 && pixbuf_height > 0)
{
gfloat xalign, yalign;
gtk_cell_renderer_get_alignment (cell, &xalign, &yalign);
if (x_offset)
{
*x_offset = (((gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL) ?
(1.0 - xalign) : xalign) *
(cell_area->width - calc_width));
*x_offset = MAX (*x_offset, 0);
}
if (y_offset)
{
*y_offset = (yalign *
(cell_area->height - calc_height));
*y_offset = MAX (*y_offset, 0);
}
}
else
{
if (x_offset) *x_offset = 0;
if (y_offset) *y_offset = 0;
}
if (width)
*width = calc_width;
if (height)
*height = calc_height;
}
static void
gtk_cell_renderer_pixbuf_render (GtkCellRenderer *cell,
cairo_t *cr,
GtkWidget *widget,
const GdkRectangle *background_area,
const GdkRectangle *cell_area,
GtkCellRendererState flags)
{
GtkCellRendererPixbuf *cellpixbuf = (GtkCellRendererPixbuf *) cell;
GtkCellRendererPixbufPrivate *priv = cellpixbuf->priv;
GtkStyleContext *context;
GdkRectangle pix_rect;
GdkRectangle draw_rect;
gboolean is_expander;
gint xpad, ypad;
GtkStateFlags state;
GtkIconHelper *icon_helper = NULL;
gtk_cell_renderer_pixbuf_get_size (cell, widget, (GdkRectangle *) cell_area,
&pix_rect.x,
&pix_rect.y,
&pix_rect.width,
&pix_rect.height);
gtk_cell_renderer_get_padding (cell, &xpad, &ypad);
pix_rect.x += cell_area->x + xpad;
pix_rect.y += cell_area->y + ypad;
pix_rect.width -= xpad * 2;
pix_rect.height -= ypad * 2;
if (!gdk_rectangle_intersect (cell_area, &pix_rect, &draw_rect))
return;
context = gtk_widget_get_style_context (widget);
gtk_style_context_save (context);
state = gtk_cell_renderer_get_state (cell, widget, flags);
if (!priv->follow_state)
state &= ~(GTK_STATE_FLAG_FOCUSED | GTK_STATE_FLAG_PRELIGHT | GTK_STATE_FLAG_SELECTED);
gtk_style_context_set_state (context, state);
gtk_style_context_add_class (context, GTK_STYLE_CLASS_IMAGE);
g_object_get (cell, "is-expander", &is_expander, NULL);
if (is_expander)
{
gboolean is_expanded;
g_object_get (cell, "is-expanded", &is_expanded, NULL);
if (is_expanded && priv->pixbuf_expander_open != NULL)
{
icon_helper = _gtk_icon_helper_new ();
_gtk_icon_helper_set_pixbuf (icon_helper, priv->pixbuf_expander_open);
}
else if (!is_expanded && priv->pixbuf_expander_closed != NULL)
{
icon_helper = _gtk_icon_helper_new ();
_gtk_icon_helper_set_pixbuf (icon_helper, priv->pixbuf_expander_closed);
}
}
if (icon_helper == NULL)
icon_helper = g_object_ref (priv->icon_helper);
_gtk_icon_helper_set_window (icon_helper,
gtk_widget_get_window (widget));
_gtk_icon_helper_draw (icon_helper,
context, cr,
pix_rect.x, pix_rect.y);
g_object_unref (icon_helper);
gtk_style_context_restore (context);
}
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