public override eDrawObjectMouseDown OnMouseDown(ICanvas canvas, UnitPoint point, ISnapPoint snappoint)
{
if (m_tanSnap != null && Control.MouseButtons == MouseButtons.Right)
{
ReverseTangent(canvas);
return(eDrawObjectMouseDown.Continue);
}
if (m_perSnap != null || m_tanSnap != null)
{
if (snappoint != null)
{
point = snappoint.SnapPoint;
}
OnMouseMove(canvas, point);
if (m_singleLineSegment)
{
return(eDrawObjectMouseDown.Done);
}
return(eDrawObjectMouseDown.DoneRepeat);
}
eDrawObjectMouseDown result = base.OnMouseDown(canvas, point, snappoint);
if (m_singleLineSegment)
{
return(eDrawObjectMouseDown.Done);
}
return(eDrawObjectMouseDown.DoneRepeat);
}
/// <summary>
/// 处理鼠标按下的绘图
/// </summary>
/// <param name="mouseunitpoint"></param>
/// <param name="snappoint"></param>
protected virtual void HandleMouseDownWhenDrawing(UnitPoint mouseunitpoint, ISnapPoint snappoint)
{
if (m_commandType != eCommandType.draw)
{
return;
}
if (m_newObject == null)
{
m_newObject = m_model.CreateObject(m_drawObjectId, mouseunitpoint, snappoint);
DoInvalidate(false, m_newObject.GetBoundingRect(m_canvaswrapper));
return;
}
eDrawObjectMouseDown result = m_newObject.OnMouseDown(m_canvaswrapper, mouseunitpoint, snappoint);
switch (result)
{
case eDrawObjectMouseDown.Done:
m_model.AddObject(m_model.ActiveLayer, m_newObject);
m_newObject = null;
DoInvalidate(true);
break;
case eDrawObjectMouseDown.DoneRepeat:
m_model.AddObject(m_model.ActiveLayer, m_newObject);
m_newObject = m_model.CreateObject(m_newObject.Id, m_newObject.RepeatStartingPoint, null);
DoInvalidate(true);
break;
case eDrawObjectMouseDown.Continue:
break;
}
}
protected virtual void HandleMouseDownWhenDrawing(UnitPoint mouseunitpoint, ISnapPoint snappoint)
{
if (m_commandType == eCommandType.draw)
{
if (m_newObject == null)
{
m_newObject = m_model.CreateObject(m_drawObjectId, mouseunitpoint, snappoint);
DoInvalidate(false, m_newObject.GetBoundingRect(m_canvaswrapper));
}
else
{
if (m_newObject != null)
{
eDrawObjectMouseDown result = m_newObject.OnMouseDown(m_canvaswrapper, mouseunitpoint, snappoint);
switch (result)
{
case eDrawObjectMouseDown.Done:
IDrawObject addedObj = m_model.AddObject(m_model.ActiveLayer, m_newObject);
if (m_newObject is IConnectionCurve)
{
m_model.TrySnapConnectCrvToRectShape(m_canvaswrapper, (IConnectionCurve)addedObj);
}
m_newObject = null;
DoInvalidate(true);
break;
case eDrawObjectMouseDown.DoneRepeat:
addedObj = m_model.AddObject(m_model.ActiveLayer, m_newObject);
if (addedObj is IConnectionCurve)
{
m_model.TrySnapConnectCrvToRectShape(m_canvaswrapper, (IConnectionCurve)addedObj);
}
m_newObject = m_model.CreateObject(m_newObject.Id, m_newObject.RepeatStartingPoint, null);
DoInvalidate(true);
break;
case eDrawObjectMouseDown.Continue:
break;
case eDrawObjectMouseDown.Cancel:
m_newObject = null;
DoInvalidate(true);
break;
}
}
}
}
}
/// <summary>
/// 鼠标按下事件
/// </summary>
/// <param name="e"></param>
protected override void OnMouseDown(MouseEventArgs e)
{
m_mousedownPoint = new PointF(e.X, e.Y); // used when panning
m_dragOffset = new PointF(0, 0);
UnitPoint mousepoint = ToUnit(m_mousedownPoint); //获取当前光标世界坐标
if (m_snappoint != null)
{
mousepoint = m_snappoint.SnapPoint;
}
if (m_commandType == eCommandType.editNode) //如果为编辑节点
{
bool handled = false;
if (m_nodeMoveHelper.HandleMouseDown(mousepoint, ref handled))
{
FinishNodeEdit();
base.OnMouseDown(e);
return;
}
}
if (m_commandType == eCommandType.select) //如果为选中
{
bool handled = false;
if (m_nodeMoveHelper.HandleMouseDown(mousepoint, ref handled))
{
m_commandType = eCommandType.editNode;
m_snappoint = null;
base.OnMouseDown(e);
return;
}
m_selection = new SelectionRectangle(m_mousedownPoint);
}
if (m_commandType == eCommandType.move) //如果为移动
{
m_moveHelper.HandleMouseDownForMove(mousepoint, m_snappoint);
}
if (m_commandType == eCommandType.draw) //如果为绘制
{
HandleMouseDownWhenDrawing(mousepoint, null);
DoInvalidate(true);
}
if (m_commandType == eCommandType.edit) //如果为编辑
{
if (m_editTool == null) //如果编辑工具为空
{
m_editTool = m_model.GetEditTool(m_editToolId);
}
if (m_editTool != null) //如果编辑工具不为空
{
if (m_editTool.SupportSelection)
{
m_selection = new SelectionRectangle(m_mousedownPoint);
}
eDrawObjectMouseDown mouseresult = m_editTool.OnMouseDown(m_canvaswrapper, mousepoint, m_snappoint);
/*
* if (mouseresult == eDrawObjectMouseDown.Continue)
* {
* if (m_editTool.SupportSelection)
* m_selection = new SelectionRectangle(m_mousedownPoint);
* }
* */
if (mouseresult == eDrawObjectMouseDown.Done) //如果绘制已经完成
{
m_editTool.Finished();
m_editTool = m_model.GetEditTool(m_editToolId); // continue with new tool
//m_editTool = null;
if (m_editTool.SupportSelection)
{
m_selection = new SelectionRectangle(m_mousedownPoint);
}
}
}
DoInvalidate(true);
UpdateCursor(); //更新光标
}
base.OnMouseDown(e);
}
protected override void OnMouseDown(MouseEventArgs e)
{
if (m_rectBaseTextBox != null && m_rectBaseTextBox.Tag != null)
{
((DrawTools.RectBase)m_rectBaseTextBox.Tag).Text = m_rectBaseTextBox.Text;
((DrawTools.RectBase)m_rectBaseTextBox.Tag).Selected = false;
Controls.Remove(m_rectBaseTextBox);
m_model.ClearSelectedObjects();
m_rectBaseTextBox = null;
DoInvalidate(true);
return;
}
if (e.Button == MouseButtons.Middle)
{
CommandEscape();
CommandPan();
}
if (e.Button == MouseButtons.Right)
{
CommandEscape();
}
m_mousedownPoint = new PointF(e.X, e.Y); // used when panning
m_dragOffset = new PointF(0, 0);
UnitPoint mousepoint = ToUnit(m_mousedownPoint);
if (m_snappoint != null)
{
mousepoint = m_snappoint.SnapPoint; //snap point: rect point
}
if (m_commandType == eCommandType.editNode)
{
//modify a obj's node, e.g: move node
bool handled = false;
if (m_nodeMoveHelper.HandleMouseDown(mousepoint, ref handled, m_snappoint))
{
FinishNodeEdit();
base.OnMouseDown(e);
return;
}
}
if (m_commandType == eCommandType.select)
{
//select an exsiting obj
bool handled = false;
if (m_nodeMoveHelper.HandleMouseDown(mousepoint, ref handled, m_snappoint))
{
m_commandType = eCommandType.editNode;
m_snappoint = null;
base.OnMouseDown(e);
return;
}
m_selection = new SelectionRectangle(m_mousedownPoint);
}
if (m_commandType == eCommandType.move)
{
m_moveHelper.HandleMouseDownForMove(mousepoint, m_snappoint);
}
if (m_commandType == eCommandType.draw)
{
//make a new obj and add it to model
HandleMouseDownWhenDrawing(mousepoint, m_snappoint);
DoInvalidate(true);
}
if (m_commandType == eCommandType.edit)
{
if (m_editTool == null)
{
m_editTool = m_model.GetEditTool(m_editToolId);
}
if (m_editTool != null)
{
if (m_editTool.SupportSelection)
{
m_selection = new SelectionRectangle(m_mousedownPoint);
}
eDrawObjectMouseDown mouseresult = m_editTool.OnMouseDown(m_canvaswrapper, mousepoint, m_snappoint);
/*
* if (mouseresult == eDrawObjectMouseDown.Continue)
* {
* if (m_editTool.SupportSelection)
* m_selection = new SelectionRectangle(m_mousedownPoint);
* }
* */
if (mouseresult == eDrawObjectMouseDown.Done)
{
m_editTool.Finished();
m_editTool = m_model.GetEditTool(m_editToolId); // continue with new tool
//m_editTool = null;
if (m_editTool.SupportSelection)
{
m_selection = new SelectionRectangle(m_mousedownPoint);
}
}
}
DoInvalidate(true);
UpdateCursor();
}
base.OnMouseDown(e);
}
