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Clutter 0.4 Reference Manual | ![]() |
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ClutterBackend* clutter_get_default_backend (void); gdouble clutter_backend_get_resolution (ClutterBackend *backend); void clutter_backend_set_resolution (ClutterBackend *backend, gdouble dpi); guint clutter_backend_get_double_click_time (ClutterBackend *backend); void clutter_backend_set_double_click_time (ClutterBackend *backend, guint msec); guint clutter_backend_get_double_click_distance (ClutterBackend *backend); void clutter_backend_set_double_click_distance (ClutterBackend *backend, guint distance);
Clutter can be compiled against different backends. Each backend has to implement a set of functions, in order to be used by Clutter.
ClutterBackend is the base class abstracting the various implementation; it provides a basic API to query the backend for generic information and settings.
ClutterBackend is available since Clutter 0.4
ClutterBackend* clutter_get_default_backend (void);
FIXME
Returns : | the default backend. You should not ref or unref the returned object. Applications should not rarely need to use this. |
Since 0.4
gdouble clutter_backend_get_resolution (ClutterBackend *backend);
Gets the resolution for font handling on the screen; see
clutter_backend_set_resolution()
for full details.
backend : |
a ClutterBackend |
Returns : | the current resolution, or -1 if no resolution has been set. |
Since 0.4
void clutter_backend_set_resolution (ClutterBackend *backend, gdouble dpi);
Sets the resolution for font handling on the screen. This is a scale factor between points specified in a PangoFontDescription and cairo units. The default value is 96, meaning that a 10 point font will be 13 units high. (10 * 96. / 72. = 13.3).
Applications should never need to call this function.
backend : |
a ClutterBackend |
dpi : |
the resolution in "dots per inch" (Physical inches aren't actually involved; the terminology is conventional). |
Since 0.4
guint clutter_backend_get_double_click_time (ClutterBackend *backend);
Gets the maximum time between two button press events, as set
by clutter_backend_set_double_click_time()
.
backend : |
a ClutterBackend |
Returns : | a time in milliseconds |
Since 0.4
void clutter_backend_set_double_click_time (ClutterBackend *backend, guint msec);
Sets the maximum time between two button press events, used to verify whether it's a double click event or not.
backend : |
a ClutterBackend |
msec : |
milliseconds between two button press events |
Since 0.4
guint clutter_backend_get_double_click_distance (ClutterBackend *backend);
Retrieves the distance used to verify a double click event
backend : |
a ClutterBackend |
Returns : | a distance, in pixels. |
Since 0.4