public DragEvent OnMiddleMouseDrag(MouseInputEvent evt)
{
if (!evt.IsMouseMiddleDown)
{
return(null);
}
Vector2 baseOffset = new Vector2();
ScrollbarOrientation orientation = 0;
if (horizontalScrollingEnabled)
{
baseOffset.x = evt.MousePosition.x - horizontalHandle.layoutResult.screenPosition.x;
orientation |= ScrollbarOrientation.Horizontal;
}
if (verticalScrollingEnabled)
{
baseOffset.y = evt.MousePosition.y - verticalHandle.layoutResult.screenPosition.y;
orientation |= ScrollbarOrientation.Vertical;
}
return(new ScrollbarDragEvent(orientation, baseOffset, this));
}
/*
* Constructor
*/
public ThumbnailViewer()
{
_thumbnails = new ArrayList();
_selectedIndex = -1;
_scrollbarLoc = ScrollbarOrientation.Horizontal;
_firstViewable = 0;
_rows = _cols = 1;
if (_scrollbarLoc == ScrollbarOrientation.Horizontal)
{
_scrollbar = new HScrollBar();
_scrollbar.Size = new Size(this.Width, SCROLLBAR_WIDTH);
_scrollbar.Location = new Point(0, this.Height - SCROLLBAR_WIDTH);
}
else
{
_scrollbar = new VScrollBar();
_scrollbar.Size = new Size(SCROLLBAR_WIDTH, this.Height);
_scrollbar.Location = new Point(this.Width - SCROLLBAR_WIDTH, 0);
}
this.Controls.Add(_scrollbar);
_scrollbar.ValueChanged += new EventHandler(ScrollBar_ValueChanged);
}
public ScrollbarDragEvent(ScrollbarOrientation orientation, Vector2 baseOffset, ScrollView scrollView)
{
this.orientation = orientation;
this.baseOffset = baseOffset;
this.scrollView = scrollView;
}
public static extern int GetScrollPos(IntPtr hwnd, ScrollbarOrientation orientation);
