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gtk2/gtk/gtkcellrendererpixbuf.c
Benjamin Otte d2881d901b cellrendererpixbuf: Always follow state 
Applications forget to set the follow-state property and then some
themes used a style where normal symbolic icons have the same color as
prelit or selected backgrounds and that suddenly made icons invisible
and who wants that?

https://bugzilla.gnome.org/show_bug.cgi?id=746201
2015-03-14 15:46:13 +01:00

575 lines
18 KiB
C
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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 ();
_gtk_icon_helper_set_force_scale_pixbuf (priv->icon_helper, TRUE);
priv->icon_size = GTK_ICON_SIZE_MENU;
priv->follow_state = TRUE;
}
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));
/**
* GtkCellRendererPixbuf:surface:
*
* Since: 3.10
*/
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
*
* Deprecated: 3.16: Cell renderers always follow state.
*/
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"),
TRUE,
GTK_PARAM_READWRITE | G_PARAM_DEPRECATED));
/**
* 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.
*
* Returns: 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;
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);
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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