Allow user to enable or disable sprung layout.

This setting is saved with the patch so sprung patches remain sprung when
loaded again, but manually arranged patches won't be mangled.


git-svn-id: http://svn.drobilla.net/lad/trunk/ganv@5340 a436a847-0d15-0410-975c-d299462d15a1

1 files changed, 29 insertions, 2 deletions

diff --git a/src/Canvas.cpp b/src/Canvas.cpp
index 24cfaf4..7ab8577 100644
--- a/src/Canvas.cpp
+++ b/src/Canvas.cpp
@@ -247,6 +247,7 @@ struct GanvCanvasImpl {
 
 #ifdef GANV_FDGL
 		this->layout_idle_id = 0;
+		this->sprung_layout  = FALSE;
 #endif
 
 		_animate_idle_id = g_timeout_add(120, on_animate_timeout, this);
@@ -444,7 +445,8 @@ struct GanvCanvasImpl {
 	gboolean locked;
 
 #ifdef GANV_FDGL
-	guint layout_idle_id;
+	guint    layout_idle_id;
+	gboolean sprung_layout;
 #endif
 };
 
@@ -789,6 +791,9 @@ GanvCanvasImpl::layout_iteration()
 	if (_drag_state == EDGE) {
 		return FALSE;  // Canvas is locked, halt layout process
 	}
+	if (!sprung_layout) {
+		return FALSE;  // We shouldn't be running at all
+	}
 
 	static const double T_PER_US = .0001;  // Sym time per real microsecond
 
@@ -1948,7 +1953,7 @@ void
 ganv_canvas_contents_changed(GanvCanvas* canvas)
 {
 #ifdef GANV_FDGL
-	if (!canvas->impl->layout_idle_id) {
+	if (!canvas->impl->layout_idle_id && canvas->impl->sprung_layout) {
 		canvas->impl->layout_idle_id = g_timeout_add_full(
 			G_PRIORITY_DEFAULT_IDLE,
 			33,
@@ -2554,6 +2559,28 @@ ganv_canvas_export_dot(GanvCanvas* canvas, const char* filename)
 }
 
 gboolean
+ganv_canvas_supports_sprung_layout(GanvCanvas* canvas)
+{
+#ifdef GANV_FDGL
+	return TRUE;
+#else
+	return FALSE;
+#endif
+}
+
+gboolean
+ganv_canvas_set_sprung_layout(GanvCanvas* canvas, gboolean sprung_layout)
+{
+#ifndef GANV_FDGL
+	return FALSE;
+#else
+	canvas->impl->sprung_layout = sprung_layout;
+	ganv_canvas_contents_changed(canvas);
+	return TRUE;
+#endif
+}
+
+gboolean
 ganv_canvas_get_locked(GanvCanvas* canvas)
 {
 	return canvas->impl->locked;