/// <summary>
/// A handler for mouse down events
/// </summary>
/// <param name="sender">the object that generated the event</param>
/// <param name="e">the mouse event data</param>
public override void MouseDown(object sender, MouseEventArgs e)
{
if (e.Button != MouseButtons.Left) return;
foreach (var f in _canvas.SelectedFigures)
{
foreach (var h in f.Handles)
{
if (h.Touches(e.X, e.Y))
_selectedHandle = h;
}
}
if (_selectedHandle != null) // mouse was pressed over a handle
{
_selectedHandle.Selected = true;
}
else
{
_canvas.ClearSelected();
_selectedFigure = _canvas.FindFigureAtPoint(e.Location);
if (_selectedFigure != null) // mouse was pressed over a figure
{
_selectedFigure.Selected = true;
_canvas.TopFigure = _selectedFigure;
_figureLocator = _selectedFigure.RelativeLocator(e.Location);
}
else // just on the canvas, so make a selection rectangle
{
_startPoint = e.Location;
_selectionBox = new Rectangle(e.Location, Size.Empty);
_canvas.SelectionRectangle = _selectionBox;
_canvas.Repaint(Rectangle.Inflate(_selectionBox, 1, 1));
}
}
}