/*************************************************************************
handler function for when thumb tracking begins
*************************************************************************/
bool Scrollbar::handleThumbTrackStarted(const EventArgs&)
{
// simply trigger our own version of this event
WindowEventArgs args(this);
onThumbTrackStarted(args);
return true;
}
/*************************************************************************
Handler for mouse button down events
*************************************************************************/
void Thumb::onMouseButtonDown(MouseEventArgs& e)
{
// default processing
PushButton::onMouseButtonDown(e);
if (e.button == LeftButton)
{
// initialise the dragging state
d_beingDragged = true;
d_dragPoint = CoordConverter::screenToWindow(*this, e.position);
// trigger tracking started event
WindowEventArgs args(this);
onThumbTrackStarted(args);
++e.handled;
}
}
/*************************************************************************
Handler for mouse button down events
*************************************************************************/
void Thumb::onMouseButtonDown(MouseEventArgs& e)
{
// default processing
PushButton::onMouseButtonDown(e);
if (e.button == LeftButton)
{
// initialise the dragging state
d_beingDragged = true;
d_dragPoint = screenToWindow(e.position);
if (getMetricsMode() == Relative)
{
d_dragPoint = relativeToAbsolute(d_dragPoint);
}
// trigger tracking started event
WindowEventArgs args(this);
onThumbTrackStarted(args);
e.handled = true;
}
}