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gboolean | gwy_pixmap_layer_wants_repaint () |
GdkPixbuf * | gwy_pixmap_layer_paint () |
void | gwy_pixmap_layer_set_data_key () |
const gchar * | gwy_pixmap_layer_get_data_key () |
void | gwy_pixmap_layer_make_pixbuf () |
GObject ╰── GInitiallyUnowned ╰── GtkObject ╰── GwyDataViewLayer ╰── GwyPixmapLayer ├── GwyLayerBasic ╰── GwyLayerMask
GwyPixmapLayer is a base class for data field displaying GwyDataViewLayer's. It is a GwyDataView component and it is not normally usable outside of it.
The layer takes the data field to display from its parent GwyDataView.
The key under which the data field is found must be set with
gwy_pixmap_layer_set_data_key()
.
The other methods are only rarely needed outside GwyDataView implementation.
gboolean
gwy_pixmap_layer_wants_repaint (GwyPixmapLayer *pixmap_layer
);
Checks whether a pixmap layer wants repaint.
GdkPixbuf *
gwy_pixmap_layer_paint (GwyPixmapLayer *pixmap_layer
);
Returns a pixbuf with painted pixmap layer.
This method does not enforce repaint. If the layer doesn't think it needs to repaint the pixbuf, it simply returns the current one. To enforce update, emit "data-changed" signal on corresponding data field.
The pixbuf. It should not be modified or freed. If the data field
to draw is not present in the container, NULL
is returned.
void gwy_pixmap_layer_set_data_key (GwyPixmapLayer *pixmap_layer
,const gchar *key
);
Sets the data field to display by a pixmap layer.
const gchar *
gwy_pixmap_layer_get_data_key (GwyPixmapLayer *pixmap_layer
);
Gets the key identifying data field this pixmap layer displays.
void gwy_pixmap_layer_make_pixbuf (GwyPixmapLayer *pixmap_layer
,gboolean has_alpha
);
Creates or resizes pixmap layer GdkPixbuf to match its data field.
This method is intended for pixmap layer implementation.
“data-key”
property “data-key” char *
The :data-key property is the container key used to identify displayed GwyDataField in container.
Owner: GwyPixmapLayer
Flags: Read / Write
Default value: NULL