/// <summary> 窗体键盘按下事件<para />
/// 1、移动选中元素
/// </summary>
private void frmMain_KeyDown(object sender, KeyEventArgs e)
{
_isctrl = e.Control;
_isshift = e.Shift;
//键盘移动绘制元素位移量
Size offset = Size.Empty;
/* 判断按键为前头和Delete
*/
if ((37 <= e.KeyValue && 40 >= e.KeyValue) ||
46 == e.KeyValue)
{
if (!_ischange)
{
_ischange = true;
}
}
else
{
e.Handled = true;
return;
}
if (_wa.IsSelectElement)
{
switch (e.KeyValue)
{
default: { break; }
case 37: //←
{
offset = new Size(-_wa.GridWidth, 0);
_wa.MoveElementTo(offset, new Object[] { _isctrl, _isshift });
break;
}
case 38: //↑
{
offset = new Size(0, -_wa.GridHeight);
_wa.MoveElementTo(offset, new Object[] { _isctrl, _isshift });
break;
}
case 39: //→
{
offset = new Size(_wa.GridWidth, 0);
_wa.MoveElementTo(offset, new Object[] { _isctrl, _isshift });
break;
}
case 40: //↓
{
offset = new Size(0, _wa.GridHeight);
_wa.MoveElementTo(offset, new Object[] { _isctrl, _isshift });
break;
}
case 46: //Delete
{
_wa.DeleteElement();
break;
}
}
_wa.RecordHistory();
picWorkArea.Invalidate();
}
}
