Allow changing the edit voxel size using the mouse wheel.

interface/src/Application.cpp

@@ -24,6 +24,7 @@
 #include <QMainWindow>
 #include <QMenuBar>
 #include <QMouseEvent>
+#include <QWheelEvent>
 #include <QShortcut>
 #include <QTimer>
 #include <QtDebug>
@@ -82,6 +83,8 @@ protected:
     virtual void mouseMoveEvent(QMouseEvent* event);
     virtual void mousePressEvent(QMouseEvent* event);
     virtual void mouseReleaseEvent(QMouseEvent* event);
+    
+    virtual void wheelEvent(QWheelEvent* event);
 };
 
 void GLCanvas::initializeGL() {
@@ -116,6 +119,10 @@ void GLCanvas::mouseReleaseEvent(QMouseEvent* event) {
     static_cast<Application*>(QCoreApplication::instance())->mouseReleaseEvent(event);
 }
 
+void GLCanvas::wheelEvent(QWheelEvent* event) {
+    static_cast<Application*>(QCoreApplication::instance())->wheelEvent(event);
+}
+
 Application::Application(int& argc, char** argv) :
         QApplication(argc, argv),
         _window(new QMainWindow(desktop())),
@@ -720,6 +727,18 @@ void Application::mouseReleaseEvent(QMouseEvent* event) {
         _mousePressed = false;
     }
 }
+
+void Application::wheelEvent(QWheelEvent* event) {
+    if (_mouseMode == NO_EDIT_MODE) {
+        event->ignore();
+        return;
+    }
+    if (event->delta() > 0) {
+        _mouseVoxelScale *= 2;
+    } else {
+        _mouseVoxelScale /= 2;
+    }
+}
     
 //  Every second, check the frame rates and other stuff
 void Application::timer() {

interface/src/Application.h

@@ -34,6 +34,7 @@ class QGLWidget;
 class QKeyEvent;
 class QMainWindow;
 class QMouseEvent;
+class QWheelEvent;
 
 class Agent;
 class ProgramObject;
@@ -55,6 +56,8 @@ public:
     void mousePressEvent(QMouseEvent* event);
     void mouseReleaseEvent(QMouseEvent* event);
 
+    void wheelEvent(QWheelEvent* event);
+
 private slots:
     
     void timer();