Add assertions for 0-width ModuleWidgets. Add warning if framebuffer cannot be created in FramebufferWidget.

include/widget/Widget.hpp

@@ -136,7 +136,7 @@ struct Widget {
 	}
 
 	/** Override these event callbacks to respond to events.
-	See events.hpp for a description of each event.
+	See event.hpp for a description of each event.
 	*/
 	virtual void onHover(const event::Hover &e) {recursePositionEvent(&Widget::onHover, e);}
 	virtual void onButton(const event::Button &e) {recursePositionEvent(&Widget::onButton, e);}

src/app/RackWidget.cpp

@@ -358,6 +358,8 @@ static void RackWidget_updateAdjacent(RackWidget *that) {
 void RackWidget::addModule(ModuleWidget *m) {
 	// Add module to ModuleContainer
 	assert(m);
+	// Module must be 3U high and at least 1HP wide
+	assert(m->box.size.x >= RACK_GRID_WIDTH);
 	assert(m->box.size.y == RACK_GRID_HEIGHT);
 	moduleContainer->addChild(m);
 

src/widget/FramebufferWidget.cpp

@@ -70,8 +70,10 @@ void FramebufferWidget::step() {
 			fb = nvgluCreateFramebuffer(vg, fbSize.x * oversample, fbSize.y * oversample, 0);
 	}
 
-	if (!fb)
+	if (!fb) {
+		WARN("Framebuffer of size (%f, %f) * %f could not be created for FramebufferWidget", VEC_ARGS(fbSize), oversample);
 		return;
+	}
 
 	nvgluBindFramebuffer(fb);
 	drawFramebuffer();
@@ -80,8 +82,10 @@ void FramebufferWidget::step() {
 	// If oversampling, create another framebuffer and copy it to actual size.
 	if (oversample != 1.0) {
 		NVGLUframebuffer *newFb = nvgluCreateFramebuffer(vg, fbSize.x, fbSize.y, 0);
-		if (!newFb)
+		if (!newFb) {
+			WARN("Non-oversampled framebuffer of size (%f, %f) could not be created for FramebufferWidget", VEC_ARGS(fbSize));
 			return;
+		}
 
 		// Use NanoVG for resizing framebuffers
 		nvgluBindFramebuffer(newFb);