/// <summary>
/// 按下鼠标左键
/// </summary>
public override void OnMouseDown(DrawArea drawArea, MouseEventArgs e)
{
_selectMode = SelectionMode.None;
PointF point = new Point(e.X, e.Y);
// 调整大小的测试（仅当选择了控件时，光标位于句柄上）
int n = drawArea.GraphicsList.SelectionCount;
for (int i = 0; i < n; i++)
{
DrawObject o = drawArea.GraphicsList.GetSelectedObject(i);
int handleNumber = o.HitTest(point);
bool hitOnOutline = o.HitOnCircumferance;
if (handleNumber > 0)
{
_selectMode = SelectionMode.Size;
#region LineConnect
if (o is DrawConnectLine && handleNumber != 2)
{
((DrawConnectLine)o).SetFollowObjectNull(handleNumber);
}
if (o is DrawConnectObject connect)
{
connect.SetFollowDrawObject(handleNumber, null, -1);
}
//if (o is WireConnectLineDrawObject && handleNumber != 2)
//{
// ((WireConnectLineDrawObject)o).SetFollowObjectNull(handleNumber);
//}
#endregion
//if ( o is SingleDisConnectorDrawObject && handleNumber == 9)
//{
// float state = ((SingleDisConnectorDrawObject)o).Switch;
// ((SingleDisConnectorDrawObject)o).Switch = state == 0 ? 1 : 0;
//}
// 在类成员中保留调整大小的对象
_resizedObject = o;
_resizedObjectHandle = handleNumber;
// 因为我们只想调整一个对象的大小，所以取消选择所有其他对象。
drawArea.GraphicsList.UnselectAll();
o.Selected = true;
o.MouseClickOnHandle(handleNumber);
break;
}
if (hitOnOutline && (n == 1))
{
_selectMode = SelectionMode.Size;
o.MouseClickOnBorder();
o.Selected = true;
}
}
// 移动测试（光标在对象上）
if (_selectMode == SelectionMode.None)
{
int n1 = drawArea.GraphicsList.Count;
DrawObject o = null;
for (int i = 0; i < n1; i++)
{
if (drawArea.GraphicsList[i].HitTest(point) == 0)
{
o = drawArea.GraphicsList[i];
break;
}
}
if (o != null)
{
_selectMode = SelectionMode.Move;
// 如果未按ctrl且尚未选择单击的对象，则取消全选
if ((Control.ModifierKeys & Keys.Control) == 0 && !o.Selected)
{
drawArea.GraphicsList.UnselectAll();
}
// 选择单击的对象
o.Selected = true;
drawArea.Cursor = Cursors.SizeAll;
}
}
//判断是否点击到旋钮
if (_selectMode == SelectionMode.None)
{
for (int i = 0; i < n; i++)
{
DrawObject o = drawArea.GraphicsList.GetSelectedObject(i);
bool hitonknob = o.HitKnobTest(point);
if (hitonknob)
{
_selectMode = SelectionMode.Rotate;
// 在类成员中保留调整角度的对象
_rerotateObject = o;
// 因为我们只想调整一个对象的大小，所以取消选择所有其他对象。
drawArea.GraphicsList.UnselectAll();
o.Selected = true;
break;
}
}
}
// 净选择
if (_selectMode == SelectionMode.None)
{
// 点击背景
if ((Control.ModifierKeys & Keys.Control) == 0)
{
drawArea.GraphicsList.UnselectAll();
}
_selectMode = SelectionMode.NetSelection;
drawArea.DrawNetRectangle = true;
}
//保存一次最近操作
_lastPoint.X = e.X;
_lastPoint.Y = e.Y;
_startPoint.X = e.X;
_startPoint.Y = e.Y;
drawArea.Capture = true;
drawArea.NetRectangle = DrawRectangleObject.GetNormalizedRectangle(_startPoint, _lastPoint);
drawArea.Refresh();
}