static void
layer_change_revert(struct LayerChange *change, Diagram *dia)
{
switch (change->type) {
case TYPE_DELETE_LAYER:
data_add_layer_at(dia->data, change->layer, change->index);
break;
case TYPE_ADD_LAYER:
data_remove_layer(dia->data, change->layer);
break;
case TYPE_RAISE_LAYER:
data_lower_layer(dia->data, change->layer);
break;
case TYPE_LOWER_LAYER:
data_raise_layer(dia->data, change->layer);
break;
}
diagram_add_update_all(dia);
if (layer_dialog->diagram == dia) {
layer_dialog_set_diagram(dia);
}
change->applied = 0;
}
static void
layer_dialog_delete_callback(GtkWidget *widget, gpointer gdata)
{
Diagram *dia;
GtkWidget *selected;
Layer *layer;
int pos;
dia = layer_dialog->diagram;
if ((dia != NULL) && (dia->data->layers->len>1)) {
assert(GTK_LIST(layer_dialog->layer_list)->selection != NULL);
selected = GTK_LIST(layer_dialog->layer_list)->selection->data;
layer = dia->data->active_layer;
data_remove_layer(dia->data, layer);
diagram_add_update_all(dia);
diagram_flush(dia);
pos = gtk_list_child_position(GTK_LIST(layer_dialog->layer_list), selected);
gtk_container_remove(GTK_CONTAINER(layer_dialog->layer_list), selected);
undo_layer(dia, layer, TYPE_DELETE_LAYER,
dia->data->layers->len - pos);
undo_set_transactionpoint(dia->undo);
if (--pos<0)
pos = 0;
gtk_list_select_item(GTK_LIST(layer_dialog->layer_list), pos);
}
}
static PyObject *
PyDiaDiagramData_DeleteLayer(PyDiaDiagramData *self, PyObject *args)
{
PyDiaLayer *layer;
if (!PyArg_ParseTuple(args, "O!:DiagramData.delete_layer",
&PyDiaLayer_Type, &layer))
return NULL;
data_remove_layer(self->data, layer->layer);
layer_destroy(layer->layer);
layer->layer = NULL;
Py_INCREF(Py_None);
return Py_None;
}
