o Key-press event in the QGLView were ignored, as it never got the

  focus. Fix: Gain focus on mouse-click inside that view.
o QGLView: make zoom-in as well possible on '=' key. On American
  keyboards, the '=' key is right next to the '-' (Minus) key, while
  '+' (plus) requires Shift-equals.
o Provide a useful 'c' key-binding for 'center'. Very useful after
  getting lost in panning.

1 files changed, 11 insertions, 5 deletions

diff --git a/src/QGLView.cc b/src/QGLView.cc
index 8aaeaf2..5cb2e1b 100644
--- a/src/QGLView.cc
+++ b/src/QGLView.cc
@@ -167,15 +167,20 @@ void QGLView::paintGL()
 
 void QGLView::keyPressEvent(QKeyEvent *event)
 {
-  if (event->key() == Qt::Key_Plus) {
+  switch (event->key()) {
+  case Qt::Key_Plus:  // On many keyboards, this requires to press Shift-equals
+  case Qt::Key_Equal: // ...so simplify this a bit.
     cam.viewer_distance *= 0.9;
     updateGL();
-    return;
-  }
-  if (event->key() == Qt::Key_Minus) {
+    break;
+  case Qt::Key_Minus:
     cam.viewer_distance /= 0.9;
     updateGL();
-    return;
+    break;
+  case Qt::Key_C:     // 'center'
+    cam.object_trans << 0, 0, 0;
+    updateGL();
+    break;
   }
 }
 
@@ -187,6 +192,7 @@ void QGLView::wheelEvent(QWheelEvent *event)
 
 void QGLView::mousePressEvent(QMouseEvent *event)
 {
+  setFocus();
   mouse_drag_active = true;
   last_mouse = event->globalPos();
 }