void VScrollBarOverlayWindow::SetThumbOffsetY(int y)
{
int const new_offset = GetValidOffsetYValue(y);
if (new_offset != mouse_offset_y_)
{
if (HasState(ThumbState::MOUSE_DOWN))
MouseDragging();
mouse_offset_y_ = new_offset;
QueueDraw();
}
}
void wxMouseEventsManager::OnMove(wxMouseEvent& event)
{
switch ( m_state )
{
case State_Normal:
event.Skip();
break;
case State_Pressed:
wxASSERT_MSG( event.LeftIsDown(),
"should have detected mouse being released" );
{
// it's probably a bad idea to query the system for these
// values every time the mouse is moved so cache them on the
// assumption that they don't change -- which is wrong, of
// course, the user can change them but it doesn't happen often
static const int
dragMinX = wxSystemSettings::GetMetric(wxSYS_DRAG_X);
static const int
dragMinY = wxSystemSettings::GetMetric(wxSYS_DRAG_Y);
const wxPoint& pos = event.GetPosition();
const wxPoint ofs = pos - m_posLast;
if ( abs(ofs.x) > dragMinX || abs(ofs.y) > dragMinY )
{
// the mouse left the rectangle inside which its movements
// are considered to be too small to constitute a start of
// drag operation, do [attempt to] start it now
if ( MouseDragBegin(m_item, pos) )
{
m_state = State_Dragging;
}
}
else // still didn't move far enough away
{
event.Skip();
}
}
break;
case State_Dragging:
m_posLast = event.GetPosition();
MouseDragging(m_item, m_posLast);
break;
}
}
