snap cursor to center of HMD tools dialog when shown, or app when the dialog is hidden

interface/src/ui/HMDToolsDialog.cpp

@@ -170,4 +170,19 @@ void HMDToolsDialog::closeEvent(QCloseEvent* event) {
     emit closed();
 }
 
+void HMDToolsDialog::centerCursorOnWidget(QWidget* widget) {
+    QWindow* window = widget->windowHandle();
+    QScreen* screen = window->screen();
+    QPoint windowCenter = window->geometry().center();
+    QCursor::setPos(screen, windowCenter);
+}
+
+void HMDToolsDialog::showEvent(QShowEvent* event) {
+    centerCursorOnWidget(this);
+}
+
+void HMDToolsDialog::hideEvent(QHideEvent* event) {
+    centerCursorOnWidget(Application::getInstance()->getWindow());
+}
+
 

interface/src/ui/HMDToolsDialog.h

@@ -35,10 +35,13 @@ public slots:
     void applicationWindowScreenChanged(QScreen* screen);
 
 protected:
-    // Emits a 'closed' signal when this dialog is closed.
+    virtual void closeEvent(QCloseEvent*); // Emits a 'closed' signal when this dialog is closed.
-    void closeEvent(QCloseEvent*);
+    virtual void showEvent(QShowEvent* event);
+    virtual void hideEvent(QHideEvent* event);
 
 private:
+    void centerCursorOnWidget(QWidget* widget);
+
     bool _wasMoved;
     QRect _previousRect;
     QScreen* _previousScreen;