How to enable middle mouse button events [code]

After I had searched high and low in forums and Google I came to the conclusion that something must have been broken in the source somewhere.

It took me just about 5 minutes to find where to do the change and recompile.

In t2dSceneWindow.h add these declarations att the bottom somewhere after the other onXxxxMouse events.

void onMiddleMouseDown(const GuiEvent &event);
void onMiddleMouseUp(const GuiEvent &event);
void onMiddleMouseDragged(const GuiEvent &event);

In t2dSceneWindow.cc add the following functions somewhere (preferable after the other on mouse functions).

//-----------------------------------------------------------------------------
// Mouse Event Handler.
//-----------------------------------------------------------------------------
void t2dSceneWindow::onMiddleMouseDown( const GuiEvent& event )
{
    // Lock Mouse (if necessary).
    if(mLockMouse)
        mouseLock();

    // Dispatch Mouse Event.
    dispatchMouseEvent("onMiddleMouseDown", event);
}

//-----------------------------------------------------------------------------
// Mouse Event Handler.
//-----------------------------------------------------------------------------
void t2dSceneWindow::onMiddleMouseUp( const GuiEvent& event )
{
    // Lock Mouse (if necessary).
    if(mLockMouse)
        mouseUnlock();

    // Dispatch Mouse Event.
    dispatchMouseEvent("onMiddleMouseUp", event);
}

//-----------------------------------------------------------------------------
// Mouse Event Handler.
//-----------------------------------------------------------------------------
void t2dSceneWindow::onMiddleMouseDragged( const GuiEvent& event )
{
    // Dispatch Mouse Event.
    dispatchMouseEvent("onMiddleMouseDragged", event);
}

As you can see in the code, there are already functions for the mouse wheel scroll as well:

onMouseWheelUp
onMouseWheelDown

Enjoy!