protected override void OnMouseMove(MouseEventArgs e)
{
base.OnMouseMove(e);
_endPoint = e.Location;
if (_mouseDown)
{
if (DrawStyle == DrawStyle.Line)
{
LinePointList.Add(_endPoint);
}
}
base.Invalidate();
}
private void DrawTools(Graphics g, Point point)
{
switch (DrawStyle)
{
case DrawStyle.Rectangle:
using (Pen pen = new Pen(this.SelectColor))
{
g.DrawRectangle(
pen,
Rectangle.FromLTRB(
_mouseDownPoint.X,
_mouseDownPoint.Y,
point.X,
point.Y));
}
break;
case DrawStyle.Ellipse:
using (Pen pen = new Pen(this.SelectColor))
{
g.DrawEllipse(
pen,
Rectangle.FromLTRB(
_mouseDownPoint.X,
_mouseDownPoint.Y,
point.X,
point.Y));
}
break;
case DrawStyle.Arrow:
using (Pen pen = new Pen(this.SelectColor))
{
pen.EndCap = LineCap.ArrowAnchor;
pen.EndCap = LineCap.Custom;
pen.CustomEndCap = new AdjustableArrowCap(4, 4, true);
g.DrawLine(pen, _mouseDownPoint, point);
}
break;
case DrawStyle.Text:
using (Pen pen = new Pen(this.SelectColor))
{
pen.DashStyle = DashStyle.DashDot;
pen.DashCap = DashCap.Round;
pen.DashPattern = new float[] { 9f, 3f, 3f, 3f };
g.DrawRectangle(
pen,
Rectangle.FromLTRB(
_mouseDownPoint.X,
_mouseDownPoint.Y,
point.X,
point.Y));
}
break;
case DrawStyle.Line:
if (LinePointList.Count < 2)
{
return;
}
Point[] points = LinePointList.ToArray();
using (Pen pen = new Pen(this.SelectColor))
{
g.DrawLines(
pen,
points);
}
break;
}
}
private void AddOperate(Point point)
{
Color color = this.SelectColor;
switch (DrawStyle)
{
case DrawStyle.Rectangle:
OperateManager.AddOperate(
OperateType.DrawRectangle,
color,
Rectangle.FromLTRB(
_mouseDownPoint.X,
_mouseDownPoint.Y,
point.X,
point.Y));
break;
case DrawStyle.Ellipse:
OperateManager.AddOperate(
OperateType.DrawEllipse,
color,
Rectangle.FromLTRB(
_mouseDownPoint.X,
_mouseDownPoint.Y,
point.X,
point.Y));
break;
case DrawStyle.Arrow:
Point[] points = new Point[] { _mouseDownPoint, point };
OperateManager.AddOperate(
OperateType.DrawArrow,
color,
points);
break;
case DrawStyle.Line:
if (LinePointList.Count < 2)
{
return;
}
OperateManager.AddOperate(
OperateType.DrawLine,
color,
LinePointList.ToArray());
LinePointList.Clear();
break;
case DrawStyle.Text:
EventHandler handler = base.Events[EventTextBoxShow] as EventHandler;
if (handler != null)
{
handler(this, new EventArgs());
}
Rectangle textRect = Rectangle.FromLTRB(
_mouseDownPoint.X,
_mouseDownPoint.Y,
point.X,
point.Y);
DrawTextData textData = new DrawTextData(
string.Empty,
base.Font,
textRect);
OperateManager.AddOperate(
OperateType.DrawText,
color,
textData);
break;
}
}
