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#include <gtk/gtk.h>
#include <glib.h>
enum
{
/*
* In GTK+ 3.24.9 and later, the "overlay-scrolling" property is assigned
* a property number of 85. We might as well follow that convention here
* and avoid any property number collisions.
*/
PROP_OVERLAY_SCROLLING = 85
};
static gboolean overlay_scrolling_enabled = TRUE;
static GParamSpec * gtk_overlay_scrolling_pspec;
static void (*original_gtk_settings_set_property) (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void (*original_gtk_settings_get_property) (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void overridden_gtk_settings_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void overridden_gtk_settings_get_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
G_MODULE_EXPORT const char *
g_module_check_init (GModule *module)
{
/*
* Exit immediately on GTK+ versions prior to 3.15.0, since overlay
* scrolling hadn't been introduced yet!
*/
if (gtk_check_version (3,15,0) != NULL)
{
return "Your version of GTK+ is too old to support overlay scrolling.\n"
"This module is thus unnecessary and you should remove it.";
}
/*
* Similarly, a property was introduced in GTK+ 3.24.9 to disable overlay
* scrolling globally, making this module redundant.
*/
else if (gtk_check_version (3,24,9) == NULL)
{
return "Your version of GTK+ already supports globally disabling overlay scrolling.\n"
"This module is thus redundant and you should remove it.";
}
/*
* Otherwise, this module is useful for the current version of GTK+, so
* proceed with loading it.
*/
else
{
g_module_make_resident (module);
return NULL;
}
}
G_MODULE_EXPORT int
gtk_module_init (gint * argc, char *** argv)
{
GtkSettingsClass *gtk_settings_class;
GtkScrolledWindowClass *gtk_scrolled_window_class;
(void) argc;
(void) argv;
gtk_settings_class = g_type_class_ref (GTK_TYPE_SETTINGS);
gtk_overlay_scrolling_pspec = g_param_spec_boolean ("gtk-overlay-scrolling",
"Overlay Scrolling",
"Whether to enable overlay scrolling mode globally",
overlay_scrolling_enabled,
G_PARAM_READWRITE);
g_object_class_install_property (gtk_settings_class,
PROP_OVERLAY_SCROLLING,
gtk_overlay_scrolling_pspec);
original_gtk_settings_set_property = G_OBJECT_CLASS (gtk_settings_class)->set_property;
G_OBJECT_CLASS (gtk_settings_class)->set_property = overridden_gtk_settings_class_set_property;
original_gtk_settings_get_property = G_OBJECT_CLASS (gtk_settings_class)->get_property;
G_OBJECT_CLASS (gtk_settings_class)->get_property = overridden_gtk_settings_class_get_property;
g_type_class_unref (gtk_settings_class);
return 0;
}
static void overridden_gtk_settings_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
switch (property_id)
{
case PROP_OVERLAY_SCROLLING:
overlay_scrolling_enabled = g_value_get_boolean (value);
break;
default:
original_gtk_settings_set_property (object, property_id, value, pspec);
}
}
static void overridden_gtk_settings_get_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
switch (property_id)
{
case PROP_OVERLAY_SCROLLING:
g_value_set_boolean (value, overlay_scrolling_enabled);
break;
default:
original_gtk_settings_get_property (object, property_id, value, pspec);
}
}
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