Add menu-showing function to RDDialog (using manual event loop pump)

qrenderdoc/Code/CaptureContext.cpp

@@ -25,6 +25,7 @@
 #include "CaptureContext.h"
 #include <QApplication>
 #include <QFileInfo>
+#include <QMenu>
 #include <QMessageBox>
 #include <QMetaObject>
 #include <QStandardPaths>
@@ -282,6 +283,18 @@ void GUIInvoke::blockcall(const std::function<void()> &f)
   QMetaObject::invokeMethod(invoke, "doInvoke", Qt::BlockingQueuedConnection);
 }
 
+void RDDialog::show(QMenu *menu, QPoint pos)
+{
+  menu->setWindowModality(Qt::ApplicationModal);
+  menu->popup(pos);
+  QEventLoop loop;
+  while(menu->isVisible())
+  {
+    loop.processEvents(QEventLoop::WaitForMoreEvents);
+    QCoreApplication::sendPostedEvents();
+  }
+}
+
 void RDDialog::show(QDialog *dialog)
 {
   dialog->setWindowModality(Qt::ApplicationModal);

qrenderdoc/Code/CaptureContext.h

@@ -253,9 +253,12 @@ public:
   bool isRunning() { return m_Thread; }
 };
 
+class QMenu;
+
 // helper for doing a manual blocking invoke of a dialog
 struct RDDialog
 {
+  static void show(QMenu *menu, QPoint pos);
   static void show(QDialog *dialog);
   static QMessageBox::StandardButton messageBox(
       QMessageBox::Icon, QWidget *parent, const QString &title, const QString &text,