gtkzooms

gtkzooms — Functions for dealing with zoom factors

Synopsis

gdouble             gtk_zooms_get_zoom_in               (gdouble zoom);
gdouble             gtk_zooms_get_zoom_out              (gdouble zoom);
gdouble             gtk_zooms_get_min_zoom              (void);
gdouble             gtk_zooms_get_max_zoom              (void);
gdouble             gtk_zooms_clamp_zoom                (gdouble zoom);

Description

GtkImageView uses a discrete amount of zoom factors for determining which zoom to set. Using these functions, it is possible to retrieve information and manipulate a zoom factor.

Details

gtk_zooms_get_zoom_in ()

gdouble             gtk_zooms_get_zoom_in               (gdouble zoom);

Returns the zoom factor that is one step larger than the supplied zoom factor.

`zoom` :	A zoom factor.
Returns :	a zoom factor that is one step larger than the supplied one

gtk_zooms_get_zoom_out ()

gdouble             gtk_zooms_get_zoom_out              (gdouble zoom);

Returns the zoom factor that is one step smaller than the supplied zoom factor.

`zoom` :	a zoom factor
Returns :	a zoom factor that is one step smaller than the supplied one.

gtk_zooms_get_min_zoom ()

gdouble             gtk_zooms_get_min_zoom              (void);

Returns the minimum allowed zoom factor.

Returns :

The minimal zoom factor.

gtk_zooms_get_max_zoom ()

gdouble             gtk_zooms_get_max_zoom              (void);

Returns the maximum allowed zoom factor.

Returns :

The maximal zoom factor.

gtk_zooms_clamp_zoom ()

gdouble             gtk_zooms_clamp_zoom                (gdouble zoom);

Returns the zoom factor clamped to the minumum and maximum allowed value.

`zoom` :	A zoom factor
Returns :	The zoom factor clamped to the interval [min, max].

			GtkImageView Reference Manual
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