forked from AuroraMiddleware/gtk
b529f77827
We had a pretty complex setup where we tried to avoid scaling up themes from dirs that specified a size. However, not only was it very complex, but it didn't quite work with window scales, because when using e.g. a size 32 directory for 16@2x the dir size is wrong anyway. Additionally it turns out most code either picks an existing icon size, or uses the FORCE_SIZE flags, so it doesn't seem like a useful behaviour. This change drops the FORCE_SIZE flags, and always scales icons. Additionally it moves the scaling of the icon to rendering, which seems more modern, and allows us to (later) share icons loaded for different sizes that happened to use the same source file (at different scales). Note that this changes the behaviour of gtk_icon_paintable_download_texture() is it now returns the unscaled source icon. However, ignore thats, as I plan to remove this function and replace it with a way to render a paintable to a cairo-surface instead.
568 lines
19 KiB
C
568 lines
19 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 "a11y/gtkimagecellaccessible.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 (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_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 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->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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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 = 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 (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 = GTK_CELL_RENDERER_PIXBUF (cell);
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GtkCellRendererPixbufPrivate *priv = gtk_cell_renderer_pixbuf_get_instance_private (cellpixbuf);
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gint pixbuf_width;
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gint pixbuf_height;
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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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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, GTK_STYLE_CLASS_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 (cellpixbuf, 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);
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pixbuf_height = gdk_paintable_get_intrinsic_height (paintable);
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}
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else
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pixbuf_width = pixbuf_height = gtk_icon_helper_get_size (icon_helper);
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g_object_unref (icon_helper);
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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));
|
|
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_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;
|
|
gint xpad, ypad;
|
|
GtkIconHelper *icon_helper;
|
|
|
|
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, NULL))
|
|
return;
|
|
|
|
context = gtk_widget_get_style_context (widget);
|
|
gtk_style_context_save (context);
|
|
|
|
gtk_style_context_add_class (context, GTK_STYLE_CLASS_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);
|
|
}
|