/// <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);
}
