Update the Qt rendering widget periodically

src/editor/C4ConsoleQtViewport.cpp

@@ -369,6 +369,8 @@ C4ConsoleQtViewportDockWidget::C4ConsoleQtViewportDockWidget(C4ConsoleQtMainWind
 	setTitleBarWidget((title_label = new C4ConsoleQtViewportLabel(windowTitle(), this)));
 	setWidget(view);
 	connect(this, SIGNAL(topLevelChanged(bool)), this, SLOT(TopLevelChanged(bool)));
+	// Register viewport widget for periodic rendering updates.
+	cvp->viewport_widget = view;
 }
 
 void C4ConsoleQtViewportDockWidget::mousePressEvent(QMouseEvent *eventPress)

src/editor/C4ViewportWindow.cpp

@@ -29,6 +29,11 @@
 #include <gtk/gtk.h>
 #endif
 
+#ifdef WITH_QT_EDITOR
+#undef LineFeed
+#include <QWidget>
+#endif
+
 #ifdef USE_WIN32_WINDOWS
 
 void UpdateWindowLayout(HWND hwnd)
@@ -170,7 +175,10 @@ bool C4Viewport::TogglePlayerLock() {return 0;}
 
 void C4ViewportWindow::PerformUpdate()
 {
-#ifndef WITH_QT_EDITOR // done by callback
+#ifdef WITH_QT_EDITOR
+	if (viewport_widget)
+		viewport_widget->update();
+#else
 	if (cvp)
 	{
 		cvp->UpdateOutputSize();

src/editor/C4ViewportWindow.h

@@ -46,6 +46,10 @@ public:
 	C4Window * Init(int32_t iPlayer);
 	virtual void Close();
 	virtual void PerformUpdate();
+
+#ifdef WITH_QT_EDITOR
+	class QWidget *viewport_widget;
+#endif
 };
 
 #endif