private void _DrawingBoard_PanelZoomed(object sender, BoardZoomEventArgs e)
{
var mpoint = PointToClient(MousePosition);
if (_DrawingBoard.Width > Width)
{
_HScrollBar.Enabled = true;
_HScrollBar.Minimum = -_Blankness;
_HScrollBar.Maximum = _DrawingBoard.Width - Width + _Blankness;
var acu = e.MouseClickedLocation.X / e.OldZoom;
var now = acu * Zoom;
_HScrollBar.Value = -(int)(mpoint.X - now);
}
else
{
_HScrollBar.Enabled = false;
}
if (_DrawingBoard.Height > Height)
{
_VScrollBar.Enabled = true;
_VScrollBar.Minimum = -_Blankness;
_VScrollBar.Maximum = _DrawingBoard.Height - Height + _Blankness;
var acu = e.MouseClickedLocation.Y / e.OldZoom;
var now = acu * Zoom;
_VScrollBar.Value = -(int)(mpoint.Y - now);
}
else
{
_VScrollBar.Enabled = false;
}
Refresh();
}
private void OnZoomed(BoardZoomEventArgs e)
{
EventHandler <BoardZoomEventArgs> handler = Zoomed;
if (handler != null)
{
handler(this, e);
}
}