}// void DrawDragRect()
/// <summary>
/// 判断指定拖拽点是否可用
/// </summary>
/// <param name="point">拖拽点样式</param>
/// <returns>是否可用</returns>
private bool DragRectEnable(DragPointStyle point)
{
switch (point)
{
case DragPointStyle.Move:
return(bolCanMove);
case DragPointStyle.LeftTop:
return(bolCanMove && bolCanResize);
case DragPointStyle.TopCenter:
return(bolCanMove && bolCanResize);
case DragPointStyle.TopRight:
return(bolCanMove && bolCanResize);
case DragPointStyle.RightCenter:
return(bolCanResize);
case DragPointStyle.RightBottom:
return(bolCanResize);
case DragPointStyle.BottomCenter:
return(bolCanResize);
case DragPointStyle.LeftBottom:
return(bolCanMove && bolCanResize);
case DragPointStyle.LeftCenter:
return(bolCanMove && bolCanResize);
default:
return(false);
}
} //bool DragRectEnable()
/// <summary>
/// 处理文档用户界面事件
/// </summary>
/// <param name="args">事件参数</param>
public override void HandleDocumentEvent(DocumentEventArgs args)
{
if (args.Style == DocumentEventStyles.MouseDown)
{
if (this.Enabled)
{
if (this.OwnerDocument.EditorControl != null)
{
if (this.OwnerDocument.EditorControl.MouseDragScroll)
{
return;
}
}
DragPointStyle hit = this.GetDragHit(args.X, args.Y);
if (this.ShowDragRect)
{
if (hit >= 0)
{
DragBounds(hit);
args.CancelBubble = true;
if (this.OwnerDocument.EditorControl != null)
{
this.OwnerDocument.EditorControl.UpdateTextCaret();
}
return;
}
}
//if (this.AbsBounds.Contains(args.X, args.Y))
{
this.OwnerDocument.CurrentContentElement.SetSelection(this.ViewIndex, 1);
args.CancelBubble = true;
}
}
}
else if (args.Style == DocumentEventStyles.MouseMove)
{
if (this.Enabled)
{
if (this.ShowDragRect)
{
DragRectangle dr = this.CreateDragRectangle();
DragPointStyle hit = dr.DragHit(args.X, args.Y);
if (hit >= 0)
{
args.Cursor = DragRectangle.GetMouseCursor(hit);
base.HandleDocumentEvent(args);
return;
}
}
args.Cursor = System.Windows.Forms.Cursors.Arrow;
}
}
else
{
base.HandleDocumentEvent(args);
}
}
/// <summary>
/// 移动矩形
/// </summary>
/// <param name="dx">横向移动量</param>
/// <param name="dy">纵向移动量</param>
/// <param name="DragStyle">移动方式</param>
/// <param name="SourceRect">原始矩形</param>
/// <returns>移动后的矩形</returns>
public static System.Drawing.Rectangle CalcuteDragRectangle(
int dx,
int dy,
DragPointStyle DragStyle,
System.Drawing.Rectangle SourceRect)
{
// 中间
if (DragStyle == DragPointStyle.Move)
{
SourceRect.Offset(dx, dy);
}
// 左边
if (DragStyle == DragPointStyle.LeftTop ||
DragStyle == DragPointStyle.LeftCenter ||
DragStyle == DragPointStyle.LeftBottom)
{
SourceRect.Offset(dx, 0);
SourceRect.Width = SourceRect.Width - dx;
}
// 顶边
if (DragStyle == DragPointStyle.LeftTop ||
DragStyle == DragPointStyle.TopCenter ||
DragStyle == DragPointStyle.TopRight)
{
SourceRect.Offset(0, dy);
SourceRect.Height = SourceRect.Height - dy;
}
// 右边
if (DragStyle == DragPointStyle.TopRight ||
DragStyle == DragPointStyle.RightCenter ||
DragStyle == DragPointStyle.RightBottom)
{
SourceRect.Width = SourceRect.Width + dx;
}
// 底边
if (DragStyle == DragPointStyle.RightBottom ||
DragStyle == DragPointStyle.BottomCenter ||
DragStyle == DragPointStyle.LeftBottom)
{
SourceRect.Height = SourceRect.Height + dy;
}
return(SourceRect);
}
private bool DragBounds(DragPointStyle hit)
{
MouseCapturer cap = new MouseCapturer(this.OwnerDocument.EditorControl);
cap.Tag = hit;
cap.ReversibleShape = ReversibleShapeStyle.Custom;
cap.Draw += new CaptureMouseMoveEventHandler(cap_Draw);
DomDocumentContentElement ce = this.DocumentContentElement;
if (cap.CaptureMouseMove())
{
if (LastDragBounds.Width > 0 && LastDragBounds.Height > 0)
{
if (LastDragBounds.Width != this.Width ||
LastDragBounds.Height != this.Height)
{
System.Drawing.SizeF OldSize = new System.Drawing.SizeF(
this.Width,
this.Height);
this.InvalidateView();
this.EditorSize = new SizeF(LastDragBounds.Width, LastDragBounds.Height);
this.InvalidateView();
ce.SetSelection(this.ViewIndex, 1);
if (this.OwnerDocument.BeginLogUndo())
{
this.OwnerDocument.UndoList.AddProperty(
XTextUndoStyles.EditorSize,
OldSize,
new System.Drawing.SizeF(this.Width, this.Height),
this);
this.OwnerDocument.EndLogUndo();
}
this.ContentElement.RefreshPrivateContent(
this.ContentElement.PrivateContent.IndexOf(this));
//ce.RefreshPrivateContent(ce.Content.IndexOf(this));
this.OwnerDocument.Modified = true;
return(true);
}
}
}
return(false);
}
private void cap_Draw(object sender, CaptureMouseMoveEventArgs e)
{
DragPointStyle hit = (DragPointStyle)e.Sender.Tag;
System.Drawing.Rectangle rect = Rectangle.Ceiling(this.AbsBounds);
System.Drawing.Point p1 = e.StartPosition;
System.Drawing.Point p2 = e.CurrentPosition;
SimpleRectangleTransform trans = this.OwnerDocument.EditorControl.GetTransformItemByDescPoint(rect.Left, rect.Top);
if (trans != null)
{
p1 = trans.TransformPoint(p1);
p2 = trans.TransformPoint(p2);
rect = DragRectangle.CalcuteDragRectangle(
(int)(p2.X - p1.X),
(int)(p2.Y - p1.Y),
hit,
Rectangle.Ceiling(this.AbsBounds));
if (rect.Width > (int)this.OwnerDocument.Width)
{
rect.Width = (int)this.OwnerDocument.Width;
}
if (this.WidthHeightRate > 0.1)
{
rect.Height = (int)(rect.Width / this.WidthHeightRate);
}
LastDragBounds = rect;
rect = trans.UnTransformRectangle(rect);
using (ReversibleDrawer drawer =
ReversibleDrawer.FromHwnd(this.OwnerDocument.EditorControl.Handle))
{
drawer.PenStyle = PenStyle.PS_DOT;
drawer.PenColor = System.Drawing.Color.Red;
drawer.DrawRectangle(rect);
}
}
}
/// <summary>
/// 计算拖拉矩形上的鼠标光标位置
/// </summary>
/// <remarks>
/// 鼠标设置如下
/// 西北-东南 南北 东北-西南
/// ■ ■ ■
/// ┌────────────────┐
/// │0 1 2│
/// │ │
/// │ │
/// │ │
/// │ │
/// ■│7 西-南 3│■ 西-南
/// │ │
/// │ │
/// │ │
/// │ │
/// │6 5 4 │
/// └────────────────┘
/// ■ ■ ■
/// 东北-西南 南北 西北-东南
/// </remarks>
/// <param name="point">拖拽矩形的序号,从0至7</param>
/// <returns>鼠标光标对象,若序号小于0或大于7则返回空引用</returns>
public static System.Windows.Forms.Cursor GetMouseCursor(DragPointStyle point)
{
switch (point)
{
case DragPointStyle.Move:
return(System.Windows.Forms.Cursors.Arrow);
case DragPointStyle.LeftTop:
return(System.Windows.Forms.Cursors.SizeNWSE);
case DragPointStyle.TopCenter:
return(System.Windows.Forms.Cursors.SizeNS);
case DragPointStyle.TopRight:
return(System.Windows.Forms.Cursors.SizeNESW);
case DragPointStyle.RightCenter:
return(System.Windows.Forms.Cursors.SizeWE);
case DragPointStyle.RightBottom:
return(System.Windows.Forms.Cursors.SizeNWSE);
case DragPointStyle.BottomCenter:
return(System.Windows.Forms.Cursors.SizeNS);
case DragPointStyle.LeftBottom:
return(System.Windows.Forms.Cursors.SizeNESW);
case DragPointStyle.LeftCenter:
return(System.Windows.Forms.Cursors.SizeWE);
default:
return(System.Windows.Forms.Cursors.Default);
}
//return null;
}
