static void
update_autoscale(ViewHelper *self)
{
GdkRectangle viewport = self->widget_allocation;
GeglRectangle bbox = gegl_node_get_bounding_box(self->node);
model_rect_to_view_rect(self, &bbox);
if (!self->node || viewport.width < 0 || viewport.height < 0
|| bbox.width < 0 || bbox.height < 0)
return;
if (self->autoscale_policy == GEGL_GTK_VIEW_AUTOSCALE_WIDGET) {
/* Request widget size change */
/* XXX: Should we reset scale/x/y here? */
g_signal_emit(self, view_helper_signals[SIGNAL_SIZE_CHANGED],
0, &bbox, NULL);
} else if (self->autoscale_policy == GEGL_GTK_VIEW_AUTOSCALE_CONTENT) {
/* Calculate and set scaling factor to make the content fit inside */
float width_ratio = bbox.width / (float)viewport.width;
float height_ratio = bbox.height / (float)viewport.height;
float max_ratio = width_ratio >= height_ratio ? width_ratio : height_ratio;
float current_scale = view_helper_get_scale(self);
view_helper_set_scale(self, current_scale * (1.0 / max_ratio));
}
}
/* Test that the redraw signal is emitted when the GeglNode has been computed.
*
* NOTE: Does not test that the actual drawing happens, or even
* that queue_redraw is called, as this is hard to observe reliably
* Redraws can be triggered by other things, and the exposed events
* can be coalesced by GTK. */
static void
test_redraw_on_computed (int x, int y, float scale,
GeglRectangle *input, GeglRectangle *output)
{
ViewHelperTest test;
RedrawTestState test_data;
test_data.expected_result = output;
setup_helper_test(&test);
/* Setup will invalidate the node, make sure those events are processed. */
while (gtk_events_pending()) {
gtk_main_iteration();
}
gegl_node_process (test.out);
view_helper_set_x(test.helper, x);
view_helper_set_y(test.helper, y);
view_helper_set_scale(test.helper, scale);
g_signal_connect(G_OBJECT(test.helper), "redraw-needed",
G_CALLBACK(needs_redraw_event),
&test_data);
g_signal_emit_by_name(test.out, "computed", input, NULL);
g_timeout_add(300, test_utils_quit_gtk_main, NULL);
gtk_main();
g_assert(test_data.needs_redraw_called);
teardown_helper_test(&test);
}
/**
* gegl_gtk_view_set_scale:
* @self: A #GeglGtkView
* @scale:
*
* Setter for the :scale property
**/
void
gegl_gtk_view_set_scale(GeglGtkView *self, float scale)
{
view_helper_set_scale(GET_PRIVATE(self), scale);
}
