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Add xfce_panel_pixbuf_from_source().

Convenience function to load pixbuf from icon names
the the ones used in desktop files.
Code is the same as that from XfcePanelImage.
upstream/xfce4-panel-4.10.1
Nick Schermer 12 years ago
parent
commit
72c7bf9eef
  1. 1
      docs/references/libxfce4panel-sections.txt
  2. 1
      libxfce4panel/libxfce4panel.symbols
  3. 123
      libxfce4panel/xfce-panel-convenience.c
  4. 4
      libxfce4panel/xfce-panel-convenience.h

1
docs/references/libxfce4panel-sections.txt

@ -56,6 +56,7 @@ xfce_hvbox_get_type
xfce_panel_create_button
xfce_panel_create_toggle_button
xfce_panel_get_channel_name
xfce_panel_pixbuf_from_source
xfce_allow_panel_customization
xfce_create_panel_button
xfce_create_panel_toggle_button

1
libxfce4panel/libxfce4panel.symbols

@ -76,6 +76,7 @@ xfce_hvbox_get_orientation
xfce_panel_create_button G_GNUC_MALLOC G_GNUC_WARN_UNUSED_RESULT
xfce_panel_create_toggle_button G_GNUC_MALLOC G_GNUC_WARN_UNUSED_RESULT
xfce_panel_get_channel_name
xfce_panel_pixbuf_from_source
#endif
#endif

123
libxfce4panel/xfce-panel-convenience.c

@ -21,6 +21,10 @@
#include <config.h>
#endif
#ifdef HAVE_MATH_H
#include <math.h>
#endif
#include <libxfce4util/libxfce4util.h>
#include <gtk/gtk.h>
@ -118,5 +122,124 @@ xfce_panel_get_channel_name (void)
/**
* xfce_panel_pixbuf_from_source:
* @source: string that contains the location of an icon
* @icon_theme: icon theme or %NULL to use the default icon theme
* @size: size the icon should be loaded
*
* Try to load a pixbug from a source string. The source could be
* an abolute path, an icon name or a filename that point to a
* file in the pixmaps directory.
*
* This function is particularly usefull for loading names from
* the Icon key of desktop files.
*
* The pixbufs is never bigger then @size. If it is when loaded from the
* disk, the pixbuf is scales preserving the aspect ratio.
*
* Returns: a GdkPixbuf or %NULL is nothing was found. The value should
* be released with g_object_unref is no long used.
*
* See also: XfcePanelImage
*
* Since: 4.8
**/
GdkPixbuf *
xfce_panel_pixbuf_from_source (const gchar *source,
GtkIconTheme *icon_theme,
gint size)
{
GdkPixbuf *pixbuf = NULL;
gchar *p;
gchar *name;
gchar *filename;
gint src_w, src_h;
gdouble wratio, hratio;
gint dest_w, dest_h;
GdkPixbuf *dest;
GError *error = NULL;
g_return_val_if_fail (source != NULL, NULL);
g_return_val_if_fail (icon_theme == NULL || GTK_IS_ICON_THEME (icon_theme), NULL);
g_return_val_if_fail (size > 0, NULL);
if (G_UNLIKELY (g_path_is_absolute (source)))
{
pixbuf = gdk_pixbuf_new_from_file (source, &error);
if (G_UNLIKELY (pixbuf == NULL))
{
g_message ("Failed to load image \"%s\": %s",
source, error->message);
g_error_free (error);
}
}
else
{
if (G_UNLIKELY (icon_theme == NULL))
icon_theme = gtk_icon_theme_get_default ();
/* try to load from the icon theme */
pixbuf = gtk_icon_theme_load_icon (icon_theme, source, size, 0, NULL);
if (G_UNLIKELY (pixbuf == NULL))
{
/* try to lookup names like application.png in the theme */
p = strrchr (source, '.');
if (p != NULL)
{
name = g_strndup (source, p - source);
pixbuf = gtk_icon_theme_load_icon (icon_theme, name, size, 0, NULL);
g_free (name);
}
/* maybe they point to a file in the pixbufs folder */
if (G_UNLIKELY (pixbuf == NULL))
{
filename = g_build_filename ("pixmaps", source, NULL);
name = xfce_resource_lookup (XFCE_RESOURCE_DATA, filename);
g_free (filename);
if (name != NULL)
{
pixbuf = gdk_pixbuf_new_from_file (name, NULL);
g_free (name);
}
}
}
}
/* scale the pixbug if required */
if (G_LIKELY (pixbuf != NULL))
{
src_w = gdk_pixbuf_get_width (pixbuf);
src_h = gdk_pixbuf_get_height (pixbuf);
if (src_w > size || src_h > size)
{
/* calculate the new dimensions */
wratio = (gdouble) src_w / (gdouble) size;
hratio = (gdouble) src_h / (gdouble) size;
dest_w = dest_h = size;
if (hratio > wratio)
dest_w = rint (src_w / hratio);
else
dest_h = rint (src_h / wratio);
dest = gdk_pixbuf_scale_simple (pixbuf, MAX (dest_w, 1),
MAX (dest_h, 1),
GDK_INTERP_BILINEAR);
g_object_unref (G_OBJECT (pixbuf));
pixbuf = dest;
}
}
return pixbuf;
}
#define __XFCE_PANEL_CONVENIENCE_C__
#include <libxfce4panel/libxfce4panel-aliasdef.c>

4
libxfce4panel/xfce-panel-convenience.h

@ -35,6 +35,10 @@ GtkWidget *xfce_panel_create_toggle_button (void) G_GNUC_MALLOC G_GNUC_WARN_U
const gchar *xfce_panel_get_channel_name (void);
GdkPixbuf *xfce_panel_pixbuf_from_source (const gchar *source,
GtkIconTheme *icon_theme,
gint size) G_GNUC_MALLOC G_GNUC_WARN_UNUSED_RESULT;
G_END_DECLS
#endif /* !__XFCE_PANEL_CONVENIENCE_H__ */

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