forked from AuroraMiddleware/gtk
607 lines
20 KiB
C
607 lines
20 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 "gtkcellrendererpixbuf.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 "gtksnapshot.h"
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#include "gtkstylecontextprivate.h"
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#include "gtktypebuiltins.h"
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#include <cairo-gobject.h>
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#include <stdlib.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 (GtkCellRendererPixbuf *self,
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GtkWidget *widget,
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const GdkRectangle *rectangle,
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int *x_offset,
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int *y_offset,
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int *width,
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int *height);
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static void gtk_cell_renderer_pixbuf_snapshot (GtkCellRenderer *cell,
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GtkSnapshot *snapshot,
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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_TEXTURE,
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PROP_ICON_SIZE,
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PROP_ICON_NAME,
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PROP_GICON
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};
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typedef struct _GtkCellRendererPixbufPrivate GtkCellRendererPixbufPrivate;
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typedef struct _GtkCellRendererPixbufClass GtkCellRendererPixbufClass;
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struct _GtkCellRendererPixbuf
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{
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GtkCellRenderer parent;
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};
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struct _GtkCellRendererPixbufClass
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{
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GtkCellRendererClass parent_class;
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};
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struct _GtkCellRendererPixbufPrivate
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{
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GtkImageDefinition *image_def;
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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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GdkTexture *texture_expander_open;
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GdkTexture *texture_expander_closed;
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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 = gtk_cell_renderer_pixbuf_get_instance_private (cellpixbuf);
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priv->image_def = gtk_image_definition_new_empty ();
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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 = gtk_cell_renderer_pixbuf_get_instance_private (cellpixbuf);
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gtk_image_definition_unref (priv->image_def);
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g_clear_object (&priv->pixbuf_expander_open);
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g_clear_object (&priv->pixbuf_expander_closed);
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g_clear_object (&priv->texture_expander_open);
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g_clear_object (&priv->texture_expander_closed);
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G_OBJECT_CLASS (gtk_cell_renderer_pixbuf_parent_class)->finalize (object);
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}
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static GtkSizeRequestMode
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gtk_cell_renderer_pixbuf_get_request_mode (GtkCellRenderer *cell)
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{
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return GTK_SIZE_REQUEST_CONSTANT_SIZE;
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}
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static void
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gtk_cell_renderer_pixbuf_get_preferred_width (GtkCellRenderer *cell,
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GtkWidget *widget,
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int *minimum,
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int *natural)
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{
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int size = 0;
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gtk_cell_renderer_pixbuf_get_size (GTK_CELL_RENDERER_PIXBUF (cell), widget, NULL,
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NULL, NULL, &size, NULL);
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if (minimum != NULL)
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*minimum = size;
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if (natural != NULL)
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*natural = size;
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}
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static void
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gtk_cell_renderer_pixbuf_get_preferred_height (GtkCellRenderer *cell,
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GtkWidget *widget,
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int *minimum,
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int *natural)
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{
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int size = 0;
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gtk_cell_renderer_pixbuf_get_size (GTK_CELL_RENDERER_PIXBUF (cell), widget, NULL,
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NULL, NULL, NULL, &size);
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if (minimum != NULL)
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*minimum = size;
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if (natural != NULL)
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*natural = size;
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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_request_mode = gtk_cell_renderer_pixbuf_get_request_mode;
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cell_class->get_preferred_width = gtk_cell_renderer_pixbuf_get_preferred_width;
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cell_class->get_preferred_height = gtk_cell_renderer_pixbuf_get_preferred_height;
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cell_class->snapshot = gtk_cell_renderer_pixbuf_snapshot;
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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_WRITABLE));
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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:texture:
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*/
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g_object_class_install_property (object_class,
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PROP_TEXTURE,
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g_param_spec_object ("texture",
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P_("Texture"),
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P_("The texture to render"),
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GDK_TYPE_TEXTURE,
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GTK_PARAM_READWRITE));
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/**
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* GtkCellRendererPixbuf:icon-size:
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*
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* The #GtkIconSize value that specifies the size of the rendered icon.
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*/
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g_object_class_install_property (object_class,
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PROP_ICON_SIZE,
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g_param_spec_enum ("icon-size",
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P_("Icon Size"),
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P_("The GtkIconSize value that specifies the size of the rendered icon"),
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GTK_TYPE_ICON_SIZE,
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GTK_ICON_SIZE_INHERIT,
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GTK_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY));
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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 the "pixbuf" property.
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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: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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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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}
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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 = gtk_cell_renderer_pixbuf_get_instance_private (cellpixbuf);
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switch (param_id)
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{
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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_TEXTURE:
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g_value_set_object (value, gtk_image_definition_get_paintable (priv->image_def));
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break;
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case PROP_ICON_SIZE:
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g_value_set_enum (value, priv->icon_size);
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break;
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case PROP_ICON_NAME:
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g_value_set_string (value, gtk_image_definition_get_icon_name (priv->image_def));
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break;
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case PROP_GICON:
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g_value_set_object (value, gtk_image_definition_get_gicon (priv->image_def));
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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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notify_storage_type (GtkCellRendererPixbuf *cellpixbuf,
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GtkImageType storage_type)
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{
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switch (storage_type)
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{
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case GTK_IMAGE_PAINTABLE:
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g_object_notify (G_OBJECT (cellpixbuf), "texture");
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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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default:
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g_assert_not_reached ();
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case GTK_IMAGE_EMPTY:
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break;
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}
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}
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static void
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take_image_definition (GtkCellRendererPixbuf *cellpixbuf,
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GtkImageDefinition *def)
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{
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GtkCellRendererPixbufPrivate *priv = gtk_cell_renderer_pixbuf_get_instance_private (cellpixbuf);
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GtkImageType old_storage_type, new_storage_type;
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if (def == NULL)
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def = gtk_image_definition_new_empty ();
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old_storage_type = gtk_image_definition_get_storage_type (priv->image_def);
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new_storage_type = gtk_image_definition_get_storage_type (def);
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if (new_storage_type != old_storage_type)
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notify_storage_type (cellpixbuf, old_storage_type);
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gtk_image_definition_unref (priv->image_def);
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priv->image_def = def;
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}
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static void
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gtk_cell_renderer_pixbuf_set_icon_size (GtkCellRendererPixbuf *cellpixbuf,
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GtkIconSize icon_size)
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{
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GtkCellRendererPixbufPrivate *priv = gtk_cell_renderer_pixbuf_get_instance_private (cellpixbuf);
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if (priv->icon_size == icon_size)
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return;
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priv->icon_size = icon_size;
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g_object_notify (G_OBJECT (cellpixbuf), "icon-size");
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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 = gtk_cell_renderer_pixbuf_get_instance_private (cellpixbuf);
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GdkTexture *texture;
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GdkPixbuf *pixbuf;
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switch (param_id)
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{
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case PROP_PIXBUF:
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pixbuf = g_value_get_object (value);
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if (pixbuf)
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texture = gdk_texture_new_for_pixbuf (pixbuf);
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else
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texture = NULL;
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take_image_definition (cellpixbuf, gtk_image_definition_new_paintable (GDK_PAINTABLE (texture)));
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break;
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case PROP_PIXBUF_EXPANDER_OPEN:
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g_clear_object (&priv->pixbuf_expander_open);
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g_clear_object (&priv->texture_expander_open);
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priv->pixbuf_expander_open = (GdkPixbuf*) g_value_dup_object (value);
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priv->texture_expander_open = gdk_texture_new_for_pixbuf (priv->pixbuf_expander_open);
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break;
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case PROP_PIXBUF_EXPANDER_CLOSED:
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g_clear_object (&priv->pixbuf_expander_closed);
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g_clear_object (&priv->texture_expander_closed);
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priv->pixbuf_expander_closed = (GdkPixbuf*) g_value_dup_object (value);
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priv->texture_expander_closed = gdk_texture_new_for_pixbuf (priv->pixbuf_expander_open);
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break;
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case PROP_TEXTURE:
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take_image_definition (cellpixbuf, gtk_image_definition_new_paintable (g_value_get_object (value)));
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break;
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case PROP_ICON_SIZE:
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gtk_cell_renderer_pixbuf_set_icon_size (cellpixbuf, g_value_get_enum (value));
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break;
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case PROP_ICON_NAME:
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take_image_definition (cellpixbuf, gtk_image_definition_new_icon_name (g_value_get_string (value)));
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break;
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case PROP_GICON:
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take_image_definition (cellpixbuf, gtk_image_definition_new_gicon (g_value_get_object (value)));
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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 GtkIconHelper *
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create_icon_helper (GtkCellRendererPixbuf *cellpixbuf,
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GtkWidget *widget)
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{
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GtkCellRendererPixbufPrivate *priv = gtk_cell_renderer_pixbuf_get_instance_private (cellpixbuf);
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GtkIconHelper *icon_helper;
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icon_helper = gtk_icon_helper_new (gtk_style_context_get_node (gtk_widget_get_style_context (widget)),
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widget);
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_gtk_icon_helper_set_use_fallback (icon_helper, TRUE);
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_gtk_icon_helper_set_definition (icon_helper, priv->image_def);
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return icon_helper;
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}
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static void
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gtk_cell_renderer_pixbuf_get_size (GtkCellRendererPixbuf *self,
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GtkWidget *widget,
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const GdkRectangle *cell_area,
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int *x_offset,
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int *y_offset,
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int *width,
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int *height)
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{
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GtkCellRendererPixbufPrivate *priv = gtk_cell_renderer_pixbuf_get_instance_private (self);
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GtkCellRenderer *cell = GTK_CELL_RENDERER (self);
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int pixbuf_width;
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int pixbuf_height;
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int calc_width;
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int calc_height;
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int xpad, ypad;
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GtkStyleContext *context;
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GtkIconHelper *icon_helper;
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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, "image");
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gtk_icon_size_set_style_classes (gtk_style_context_get_node (context), priv->icon_size);
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icon_helper = create_icon_helper (self, widget);
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if (_gtk_icon_helper_get_is_empty (icon_helper))
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pixbuf_width = pixbuf_height = 0;
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else if (gtk_image_definition_get_paintable (priv->image_def))
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{
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GdkPaintable *paintable = gtk_image_definition_get_paintable (priv->image_def);
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pixbuf_width = gdk_paintable_get_intrinsic_width (paintable);
|
|
pixbuf_height = gdk_paintable_get_intrinsic_height (paintable);
|
|
}
|
|
else
|
|
pixbuf_width = pixbuf_height = gtk_icon_helper_get_size (icon_helper);
|
|
|
|
g_object_unref (icon_helper);
|
|
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 = (int) xpad * 2 + pixbuf_width;
|
|
calc_height = (int) ypad * 2 + pixbuf_height;
|
|
|
|
if (cell_area && pixbuf_width > 0 && pixbuf_height > 0)
|
|
{
|
|
float 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_snapshot (GtkCellRenderer *cell,
|
|
GtkSnapshot *snapshot,
|
|
GtkWidget *widget,
|
|
const GdkRectangle *background_area,
|
|
const GdkRectangle *cell_area,
|
|
GtkCellRendererState flags)
|
|
|
|
{
|
|
GtkCellRendererPixbuf *cellpixbuf = GTK_CELL_RENDERER_PIXBUF (cell);
|
|
GtkCellRendererPixbufPrivate *priv = gtk_cell_renderer_pixbuf_get_instance_private (cellpixbuf);
|
|
GtkStyleContext *context;
|
|
GdkRectangle pix_rect;
|
|
gboolean is_expander;
|
|
int xpad, ypad;
|
|
GtkIconHelper *icon_helper;
|
|
|
|
gtk_cell_renderer_pixbuf_get_size (cellpixbuf, widget,
|
|
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, NULL))
|
|
return;
|
|
|
|
context = gtk_widget_get_style_context (widget);
|
|
gtk_style_context_save (context);
|
|
|
|
gtk_style_context_add_class (context, "image");
|
|
gtk_icon_size_set_style_classes (gtk_style_context_get_node (context), priv->icon_size);
|
|
|
|
is_expander = gtk_cell_renderer_get_is_expander (cell);
|
|
if (is_expander)
|
|
{
|
|
gboolean is_expanded = gtk_cell_renderer_get_is_expanded (cell);;
|
|
|
|
if (is_expanded && priv->pixbuf_expander_open != NULL)
|
|
{
|
|
icon_helper = gtk_icon_helper_new (gtk_style_context_get_node (context), widget);
|
|
_gtk_icon_helper_set_paintable (icon_helper, GDK_PAINTABLE (priv->texture_expander_open));
|
|
}
|
|
else if (!is_expanded && priv->pixbuf_expander_closed != NULL)
|
|
{
|
|
icon_helper = gtk_icon_helper_new (gtk_style_context_get_node (context), widget);
|
|
_gtk_icon_helper_set_paintable (icon_helper, GDK_PAINTABLE (priv->texture_expander_closed));
|
|
}
|
|
else
|
|
{
|
|
icon_helper = create_icon_helper (cellpixbuf, widget);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
icon_helper = create_icon_helper (cellpixbuf, widget);
|
|
}
|
|
|
|
gtk_snapshot_save (snapshot);
|
|
gtk_snapshot_translate (snapshot, &GRAPHENE_POINT_INIT (pix_rect.x, pix_rect.y));
|
|
gdk_paintable_snapshot (GDK_PAINTABLE (icon_helper), snapshot, pix_rect.width, pix_rect.height);
|
|
gtk_snapshot_restore (snapshot);
|
|
|
|
g_object_unref (icon_helper);
|
|
gtk_style_context_restore (context);
|
|
}
|