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Gwyddion Widgets Library Reference Manual | ![]() |
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GwyVectorLayerGwyVectorLayer — Base class for GwyDataView vector (interactive) layers |
GwyVectorLayer; GwyVectorLayerClass; GwySelection* gwy_vector_layer_get_selection (GwyVectorLayer *layer); void gwy_vector_layer_set_selection_key (GwyVectorLayer *layer, const gchar *key); const gchar* gwy_vector_layer_get_selection_key (GwyVectorLayer *layer); void gwy_vector_layer_draw (GwyVectorLayer *layer, GdkDrawable *drawable); gboolean gwy_vector_layer_button_press (GwyVectorLayer *layer, GdkEventButton *event); gboolean gwy_vector_layer_button_release (GwyVectorLayer *layer, GdkEventButton *event); gboolean gwy_vector_layer_motion_notify (GwyVectorLayer *layer, GdkEventMotion *event); gboolean gwy_vector_layer_key_press (GwyVectorLayer *layer, GdkEventKey *event); gboolean gwy_vector_layer_key_release (GwyVectorLayer *layer, GdkEventKey *event);
typedef struct { GwyDataViewLayerClass parent_class; GType selection_type; /* Virtual table */ void (*draw)(GwyVectorLayer *layer, GdkDrawable *drawable); gboolean (*button_press)(GwyVectorLayer *layer, GdkEventButton *event); gboolean (*button_release)(GwyVectorLayer *layer, GdkEventButton *event); gboolean (*motion_notify)(GwyVectorLayer *layer, GdkEventMotion *event); gboolean (*key_press)(GwyVectorLayer *layer, GdkEventKey *event); gboolean (*key_release)(GwyVectorLayer *layer, GdkEventKey *event); gpointer reserved1; gpointer reserved2; } GwyVectorLayerClass;
GwySelection* gwy_vector_layer_get_selection (GwyVectorLayer *layer);
Gets the selection objects a vector layer currently uses.
layer : | A vector data view layer. |
Returns : | A GwySelection. |
void gwy_vector_layer_set_selection_key (GwyVectorLayer *layer, const gchar *key);
Sets the selection object to use by a vector layer.
layer : | A vector layer. |
key : | Container string key identifying the selection object. |
const gchar* gwy_vector_layer_get_selection_key (GwyVectorLayer *layer);
Gets the key identifying selection this vector layer displays.
layer : | A vector layer. |
Returns : | The string key, or NULL if it isn't set. |
void gwy_vector_layer_draw (GwyVectorLayer *layer, GdkDrawable *drawable);
Draws layer on given drawable (which should be a GwyDataView window).
layer : | A vector data view layer. |
drawable : | A drawable to draw on. |
gboolean gwy_vector_layer_button_press (GwyVectorLayer *layer, GdkEventButton *event);
Sends a mouse button press event to a layer.
This method primarily exists for GwyDataView to forward events to layers. You should rarely need it.
layer : | A vector data view layer. |
event : | A Gdk mouse button event. |
Returns : | TRUE if the event was handled. In practice, it returns FALSE. |
gboolean gwy_vector_layer_button_release (GwyVectorLayer *layer, GdkEventButton *event);
Sends a mouse button release event to a layer.
This method primarily exists for GwyDataView to forward events to layers. You should rarely need it.
layer : | A vector data view layer. |
event : | A Gdk mouse button event. |
Returns : | TRUE if the event was handled. In practice, it returns FALSE. |
gboolean gwy_vector_layer_motion_notify (GwyVectorLayer *layer, GdkEventMotion *event);
Sends a mouse pointer motion notification event to a layer.
This method primarily exists for GwyDataView to forward events to layers. You should rarely need it.
layer : | A vector data view layer. |
event : | A Gdk mouse pointer motion notification event. It can be a hint. |
Returns : | TRUE if the event was handled. In practice, it returns FALSE. |
gboolean gwy_vector_layer_key_press (GwyVectorLayer *layer, GdkEventKey *event);
Sends a key press event to a layer.
This method primarily exists for GwyDataView to forward events to layers. You should rarely need it.
layer : | A vector data view layer. |
event : | A Gdk key event. |
Returns : | TRUE if the event was handled. In practice, it returns FALSE. |
gboolean gwy_vector_layer_key_release (GwyVectorLayer *layer, GdkEventKey *event);
Sends a key release event to a layer.
This method primarily exists for GwyDataView to forward events to layers. You should rarely need it.
layer : | A vector data view layer. |
event : | A Gdk key event. |
Returns : | TRUE if the event was handled. In practice, it returns FALSE. |
"selection-key" gchararray : Read / Write
The :selection-key property is the container key used to identify displayed GwySelection in container.
Default value: NULL
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