579 lines
18 KiB
C
579 lines
18 KiB
C
/* gtkcellrendererpixbuf.c
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* Copyright (C) 2000 Red Hat, Inc., Jonathan Blandford <jrb@redhat.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <stdlib.h>
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#include <cairo-gobject.h>
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#include "gtkcellrendererpixbuf.h"
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#include "deprecated/gtkiconfactory.h"
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#include "gtkiconhelperprivate.h"
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#include "gtkicontheme.h"
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#include "gtkintl.h"
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#include "gtkprivate.h"
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#include "a11y/gtkimagecellaccessible.h"
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/**
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* SECTION:gtkcellrendererpixbuf
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* @Short_description: Renders a pixbuf in a cell
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* @Title: GtkCellRendererPixbuf
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*
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* A #GtkCellRendererPixbuf can be used to render an image in a cell. It allows
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* to render either a given #GdkPixbuf (set via the
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* #GtkCellRendererPixbuf:pixbuf property) or a named icon (set via the
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* #GtkCellRendererPixbuf:icon-name property).
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*
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* To support the tree view, #GtkCellRendererPixbuf also supports rendering two
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* alternative pixbufs, when the #GtkCellRenderer:is-expander property is %TRUE.
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* If the #GtkCellRenderer:is-expanded property is %TRUE and the
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* #GtkCellRendererPixbuf:pixbuf-expander-open property is set to a pixbuf, it
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* renders that pixbuf, if the #GtkCellRenderer:is-expanded property is %FALSE
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* and the #GtkCellRendererPixbuf:pixbuf-expander-closed property is set to a
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* pixbuf, it renders that one.
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*/
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static void gtk_cell_renderer_pixbuf_get_property (GObject *object,
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guint param_id,
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GValue *value,
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GParamSpec *pspec);
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static void gtk_cell_renderer_pixbuf_set_property (GObject *object,
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guint param_id,
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const GValue *value,
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GParamSpec *pspec);
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static void gtk_cell_renderer_pixbuf_get_size (GtkCellRenderer *cell,
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GtkWidget *widget,
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const GdkRectangle *rectangle,
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gint *x_offset,
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gint *y_offset,
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gint *width,
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gint *height);
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static void gtk_cell_renderer_pixbuf_render (GtkCellRenderer *cell,
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cairo_t *cr,
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GtkWidget *widget,
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const GdkRectangle *background_area,
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const GdkRectangle *cell_area,
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GtkCellRendererState flags);
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enum {
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PROP_0,
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PROP_PIXBUF,
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PROP_PIXBUF_EXPANDER_OPEN,
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PROP_PIXBUF_EXPANDER_CLOSED,
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PROP_SURFACE,
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PROP_STOCK_ID,
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PROP_STOCK_SIZE,
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PROP_STOCK_DETAIL,
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PROP_FOLLOW_STATE,
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PROP_ICON_NAME,
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PROP_GICON
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};
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struct _GtkCellRendererPixbufPrivate
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{
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GtkIconHelper *icon_helper;
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GtkIconSize icon_size;
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GdkPixbuf *pixbuf_expander_open;
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GdkPixbuf *pixbuf_expander_closed;
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gboolean follow_state;
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gchar *stock_detail;
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};
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G_DEFINE_TYPE_WITH_PRIVATE (GtkCellRendererPixbuf, gtk_cell_renderer_pixbuf, GTK_TYPE_CELL_RENDERER)
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static void
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gtk_cell_renderer_pixbuf_init (GtkCellRendererPixbuf *cellpixbuf)
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{
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GtkCellRendererPixbufPrivate *priv;
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cellpixbuf->priv = gtk_cell_renderer_pixbuf_get_instance_private (cellpixbuf);
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priv = cellpixbuf->priv;
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priv->icon_helper = _gtk_icon_helper_new ();
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_gtk_icon_helper_set_force_scale_pixbuf (priv->icon_helper, TRUE);
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priv->icon_size = GTK_ICON_SIZE_MENU;
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}
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static void
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gtk_cell_renderer_pixbuf_finalize (GObject *object)
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{
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GtkCellRendererPixbuf *cellpixbuf = GTK_CELL_RENDERER_PIXBUF (object);
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GtkCellRendererPixbufPrivate *priv = cellpixbuf->priv;
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g_clear_object (&priv->icon_helper);
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if (priv->pixbuf_expander_open)
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g_object_unref (priv->pixbuf_expander_open);
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if (priv->pixbuf_expander_closed)
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g_object_unref (priv->pixbuf_expander_closed);
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g_free (priv->stock_detail);
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G_OBJECT_CLASS (gtk_cell_renderer_pixbuf_parent_class)->finalize (object);
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}
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static void
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gtk_cell_renderer_pixbuf_class_init (GtkCellRendererPixbufClass *class)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (class);
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GtkCellRendererClass *cell_class = GTK_CELL_RENDERER_CLASS (class);
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object_class->finalize = gtk_cell_renderer_pixbuf_finalize;
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object_class->get_property = gtk_cell_renderer_pixbuf_get_property;
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object_class->set_property = gtk_cell_renderer_pixbuf_set_property;
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cell_class->get_size = gtk_cell_renderer_pixbuf_get_size;
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cell_class->render = gtk_cell_renderer_pixbuf_render;
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g_object_class_install_property (object_class,
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PROP_PIXBUF,
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g_param_spec_object ("pixbuf",
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P_("Pixbuf Object"),
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P_("The pixbuf to render"),
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GDK_TYPE_PIXBUF,
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GTK_PARAM_READWRITE));
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g_object_class_install_property (object_class,
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PROP_PIXBUF_EXPANDER_OPEN,
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g_param_spec_object ("pixbuf-expander-open",
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P_("Pixbuf Expander Open"),
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P_("Pixbuf for open expander"),
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GDK_TYPE_PIXBUF,
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GTK_PARAM_READWRITE));
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g_object_class_install_property (object_class,
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PROP_PIXBUF_EXPANDER_CLOSED,
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g_param_spec_object ("pixbuf-expander-closed",
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P_("Pixbuf Expander Closed"),
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P_("Pixbuf for closed expander"),
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GDK_TYPE_PIXBUF,
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GTK_PARAM_READWRITE));
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/**
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* GtkCellRendererPixbuf:surface:
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*
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* Since: 3.10
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*/
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g_object_class_install_property (object_class,
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PROP_SURFACE,
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g_param_spec_boxed ("surface",
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P_("surface"),
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P_("The surface to render"),
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CAIRO_GOBJECT_TYPE_SURFACE,
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GTK_PARAM_READWRITE));
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/**
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* GtkCellRendererPixbuf:stock-id:
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*
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* Deprecated: 3.10: Use #GtkCellRendererPixbuf:icon-name instead.
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*/
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g_object_class_install_property (object_class,
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PROP_STOCK_ID,
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g_param_spec_string ("stock-id",
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P_("Stock ID"),
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P_("The stock ID of the stock icon to render"),
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NULL,
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GTK_PARAM_READWRITE | G_PARAM_DEPRECATED));
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g_object_class_install_property (object_class,
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PROP_STOCK_SIZE,
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g_param_spec_uint ("stock-size",
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P_("Size"),
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P_("The GtkIconSize value that specifies the size of the rendered icon"),
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0,
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G_MAXUINT,
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GTK_ICON_SIZE_MENU,
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GTK_PARAM_READWRITE));
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g_object_class_install_property (object_class,
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PROP_STOCK_DETAIL,
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g_param_spec_string ("stock-detail",
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P_("Detail"),
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P_("Render detail to pass to the theme engine"),
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NULL,
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GTK_PARAM_READWRITE));
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/**
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* GtkCellRendererPixbuf:icon-name:
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*
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* The name of the themed icon to display.
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* This property only has an effect if not overridden by "stock_id"
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* or "pixbuf" properties.
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*
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* Since: 2.8
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*/
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g_object_class_install_property (object_class,
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PROP_ICON_NAME,
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g_param_spec_string ("icon-name",
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P_("Icon Name"),
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P_("The name of the icon from the icon theme"),
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NULL,
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GTK_PARAM_READWRITE));
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/**
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* GtkCellRendererPixbuf:follow-state:
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*
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* Specifies whether the rendered pixbuf should be colorized
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* according to the #GtkCellRendererState.
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*
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* Since: 2.8
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*/
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g_object_class_install_property (object_class,
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PROP_FOLLOW_STATE,
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g_param_spec_boolean ("follow-state",
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P_("Follow State"),
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P_("Whether the rendered pixbuf should be "
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"colorized according to the state"),
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FALSE,
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GTK_PARAM_READWRITE));
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/**
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* GtkCellRendererPixbuf:gicon:
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*
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* The GIcon representing the icon to display.
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* If the icon theme is changed, the image will be updated
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* automatically.
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*
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* Since: 2.14
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*/
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g_object_class_install_property (object_class,
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PROP_GICON,
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g_param_spec_object ("gicon",
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P_("Icon"),
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P_("The GIcon being displayed"),
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G_TYPE_ICON,
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GTK_PARAM_READWRITE));
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gtk_cell_renderer_class_set_accessible_type (cell_class, GTK_TYPE_IMAGE_CELL_ACCESSIBLE);
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}
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static void
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gtk_cell_renderer_pixbuf_get_property (GObject *object,
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guint param_id,
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GValue *value,
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GParamSpec *pspec)
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{
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GtkCellRendererPixbuf *cellpixbuf = GTK_CELL_RENDERER_PIXBUF (object);
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GtkCellRendererPixbufPrivate *priv = cellpixbuf->priv;
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switch (param_id)
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{
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case PROP_PIXBUF:
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g_value_set_object (value, _gtk_icon_helper_peek_pixbuf (priv->icon_helper));
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break;
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case PROP_PIXBUF_EXPANDER_OPEN:
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g_value_set_object (value, priv->pixbuf_expander_open);
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break;
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case PROP_PIXBUF_EXPANDER_CLOSED:
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g_value_set_object (value, priv->pixbuf_expander_closed);
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break;
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case PROP_SURFACE:
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g_value_set_boxed (value, _gtk_icon_helper_peek_surface (priv->icon_helper));
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break;
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case PROP_STOCK_ID:
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g_value_set_string (value, _gtk_icon_helper_get_stock_id (priv->icon_helper));
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break;
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case PROP_STOCK_SIZE:
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g_value_set_uint (value, priv->icon_size);
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break;
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case PROP_STOCK_DETAIL:
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g_value_set_string (value, priv->stock_detail);
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break;
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case PROP_FOLLOW_STATE:
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g_value_set_boolean (value, priv->follow_state);
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break;
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case PROP_ICON_NAME:
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g_value_set_string (value, _gtk_icon_helper_get_icon_name (priv->icon_helper));
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break;
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case PROP_GICON:
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g_value_set_object (value, _gtk_icon_helper_peek_gicon (priv->icon_helper));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
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break;
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}
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}
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static void
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gtk_cell_renderer_pixbuf_reset (GtkCellRendererPixbuf *cellpixbuf)
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{
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GtkCellRendererPixbufPrivate *priv = cellpixbuf->priv;
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GtkImageType storage_type = _gtk_icon_helper_get_storage_type (priv->icon_helper);
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switch (storage_type)
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{
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case GTK_IMAGE_SURFACE:
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g_object_notify (G_OBJECT (cellpixbuf), "surface");
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break;
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case GTK_IMAGE_PIXBUF:
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g_object_notify (G_OBJECT (cellpixbuf), "pixbuf");
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break;
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case GTK_IMAGE_STOCK:
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g_object_notify (G_OBJECT (cellpixbuf), "stock-id");
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break;
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case GTK_IMAGE_ICON_NAME:
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g_object_notify (G_OBJECT (cellpixbuf), "icon-name");
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break;
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case GTK_IMAGE_GICON:
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g_object_notify (G_OBJECT (cellpixbuf), "gicon");
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break;
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case GTK_IMAGE_EMPTY:
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default:
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break;
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}
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_gtk_icon_helper_clear (priv->icon_helper);
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}
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static void
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gtk_cell_renderer_pixbuf_set_property (GObject *object,
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guint param_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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GtkCellRendererPixbuf *cellpixbuf = GTK_CELL_RENDERER_PIXBUF (object);
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GtkCellRendererPixbufPrivate *priv = cellpixbuf->priv;
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switch (param_id)
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{
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case PROP_PIXBUF:
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gtk_cell_renderer_pixbuf_reset (cellpixbuf);
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_gtk_icon_helper_set_pixbuf (priv->icon_helper, g_value_get_object (value));
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break;
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case PROP_PIXBUF_EXPANDER_OPEN:
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if (priv->pixbuf_expander_open)
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g_object_unref (priv->pixbuf_expander_open);
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priv->pixbuf_expander_open = (GdkPixbuf*) g_value_dup_object (value);
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break;
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case PROP_PIXBUF_EXPANDER_CLOSED:
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if (priv->pixbuf_expander_closed)
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g_object_unref (priv->pixbuf_expander_closed);
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priv->pixbuf_expander_closed = (GdkPixbuf*) g_value_dup_object (value);
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break;
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case PROP_SURFACE:
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gtk_cell_renderer_pixbuf_reset (cellpixbuf);
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_gtk_icon_helper_set_surface (priv->icon_helper, g_value_get_boxed (value));
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break;
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case PROP_STOCK_ID:
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gtk_cell_renderer_pixbuf_reset (cellpixbuf);
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_gtk_icon_helper_set_stock_id (priv->icon_helper, g_value_get_string (value), priv->icon_size);
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break;
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case PROP_STOCK_SIZE:
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priv->icon_size = g_value_get_uint (value);
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_gtk_icon_helper_set_icon_size (priv->icon_helper, priv->icon_size);
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break;
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case PROP_STOCK_DETAIL:
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g_free (priv->stock_detail);
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priv->stock_detail = g_value_dup_string (value);
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break;
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case PROP_ICON_NAME:
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gtk_cell_renderer_pixbuf_reset (cellpixbuf);
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_gtk_icon_helper_set_icon_name (priv->icon_helper, g_value_get_string (value), priv->icon_size);
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break;
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case PROP_FOLLOW_STATE:
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priv->follow_state = g_value_get_boolean (value);
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break;
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case PROP_GICON:
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gtk_cell_renderer_pixbuf_reset (cellpixbuf);
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_gtk_icon_helper_set_gicon (priv->icon_helper, g_value_get_object (value), priv->icon_size);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
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break;
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}
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}
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/**
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* gtk_cell_renderer_pixbuf_new:
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*
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* Creates a new #GtkCellRendererPixbuf. Adjust rendering
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* parameters using object properties. Object properties can be set
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* globally (with g_object_set()). Also, with #GtkTreeViewColumn, you
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* can bind a property to a value in a #GtkTreeModel. For example, you
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* can bind the “pixbuf” property on the cell renderer to a pixbuf value
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* in the model, thus rendering a different image in each row of the
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* #GtkTreeView.
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*
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* Returns: the new cell renderer
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**/
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GtkCellRenderer *
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gtk_cell_renderer_pixbuf_new (void)
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{
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return g_object_new (GTK_TYPE_CELL_RENDERER_PIXBUF, NULL);
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}
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static void
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gtk_cell_renderer_pixbuf_get_size (GtkCellRenderer *cell,
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GtkWidget *widget,
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const GdkRectangle *cell_area,
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gint *x_offset,
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gint *y_offset,
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gint *width,
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gint *height)
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{
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GtkCellRendererPixbuf *cellpixbuf = (GtkCellRendererPixbuf *) cell;
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GtkCellRendererPixbufPrivate *priv = cellpixbuf->priv;
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gint pixbuf_width = 0;
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gint pixbuf_height = 0;
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gint calc_width;
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gint calc_height;
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gint xpad, ypad;
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GtkStyleContext *context;
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context = gtk_widget_get_style_context (widget);
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gtk_style_context_save (context);
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gtk_style_context_add_class (context, GTK_STYLE_CLASS_IMAGE);
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if (!_gtk_icon_helper_get_is_empty (priv->icon_helper))
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_gtk_icon_helper_get_size (priv->icon_helper,
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gtk_widget_get_style_context (widget),
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&pixbuf_width, &pixbuf_height);
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gtk_style_context_restore (context);
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if (priv->pixbuf_expander_open)
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{
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pixbuf_width = MAX (pixbuf_width, gdk_pixbuf_get_width (priv->pixbuf_expander_open));
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pixbuf_height = MAX (pixbuf_height, gdk_pixbuf_get_height (priv->pixbuf_expander_open));
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}
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if (priv->pixbuf_expander_closed)
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{
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pixbuf_width = MAX (pixbuf_width, gdk_pixbuf_get_width (priv->pixbuf_expander_closed));
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pixbuf_height = MAX (pixbuf_height, gdk_pixbuf_get_height (priv->pixbuf_expander_closed));
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}
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gtk_cell_renderer_get_padding (cell, &xpad, &ypad);
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calc_width = (gint) xpad * 2 + pixbuf_width;
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calc_height = (gint) ypad * 2 + pixbuf_height;
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|
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if (cell_area && pixbuf_width > 0 && pixbuf_height > 0)
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{
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gfloat xalign, yalign;
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|
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gtk_cell_renderer_get_alignment (cell, &xalign, &yalign);
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if (x_offset)
|
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{
|
|
*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);
|
|
}
|