comparison base/View.cpp @ 12:f67ddc287bc3

* Add ability to create empty layers for editing
* Add first basic editing capability (adding points to a time instant layer)
* Add various keyboard and mouse shortcuts for navigation &c
* Add ability to resize a selection by dragging its edges
* Add maximum zoom level

 						  ZoomConstraint::RoundUp);
     }
 
     if (newZoomLevel != m_zoomLevel) {
 	setZoomLevel(newZoomLevel);
+    }
+}
+
+void
+View::scroll(bool right, bool lots)
+{
+    long delta;
+    if (lots) {
+	delta = ((width() / 2) * m_zoomLevel);
+    } else {
+	delta = ((width() / 20) * m_zoomLevel);
+    }
+    if (right) delta = -delta;
+
+    if (int(m_centreFrame) < delta) {
+	setCentreFrame(0);
+    } else if (int(m_centreFrame) - delta >= int(getModelsEndFrame())) {
+	setCentreFrame(getModelsEndFrame());
+    } else {
+	setCentreFrame(m_centreFrame - delta);
     }
 }
 
 void
 View::checkProgress(void *object)