/// <summary> 按下中键时可拖动滚动条
///
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void MindMap_Panel_MouseDown(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Middle || e.Button == MouseButtons.Right)
{
MoveValue = e.Location;
}
else if (e.Button == MouseButtons.Left)
{
MindMapNodeContent.MindMapNodeContentBase ContentControl = ((Control)sender).GetNodeContent();
if (ContentControl == null)
{
IsMindMapNode = false;
#region 空白处按住左键，即将进行矩形选择
if (Control.ModifierKeys == Keys.Control)//按住ctrl就记录已选中节点
{
SelectedNodeList = GetSelectedNode();
}
else
{
SelectedNodeList.Clear(); //虽然不按住Control在调用本方法之前所有节点就已经取消选中了，但为了性能还是不要调用GetSelectedNode方法了吧
}
ShowOrHideLine(true); //显示矩形的线条
#endregion 空白处按住左键，即将进行矩形选择
}
else
{
// 在节点中按住左键,即将进行拖拽操作
IsMindMapNode = true;
}
MoveValue = Scroll_panel.PointToClient(Control.MousePosition);
}
IsDrag = false;
}
/// <summary>按住鼠标中间可拖动滚动条
///
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void MindMap_Panel_MouseMove(object sender, MouseEventArgs e)
{
#region 计算矩形的尺寸
Point PointTemp1 = Scroll_panel.PointToClient(Control.MousePosition);
Point PanelLocation = new Point(0, 0);
Size PanelSize = new Size();
if (MoveValue.X < PointTemp1.X)
{
PanelLocation.X = MoveValue.X;
PanelSize.Width = PointTemp1.X - MoveValue.X;
}
else
{
PanelLocation.X = PointTemp1.X;
PanelSize.Width = MoveValue.X - PointTemp1.X;
}
if (MoveValue.Y < PointTemp1.Y)
{
PanelLocation.Y = MoveValue.Y;
PanelSize.Height = PointTemp1.Y - MoveValue.Y;
}
else
{
PanelLocation.Y = PointTemp1.Y;
PanelSize.Height = MoveValue.Y - PointTemp1.Y;
}
#endregion 计算矩形的尺寸
Rectangle CurrentRectangle = new Rectangle(PanelLocation, PanelSize); //计算出当前在控件中左键画出的矩形
if (CurrentRectangle.Width < 3 || CurrentRectangle.Height < 3)
{
return; //必须拖动一定距离才触发，否则单击也会触发
}
IsDrag = true;
if (Control.MouseButtons == MouseButtons.Right)
{
#region 右键拖动思维导图
Point PointTemp = new Point();
PointTemp.X = MoveValue.X - e.Location.X;
PointTemp.Y = MoveValue.Y - e.Location.Y;
Point ResultPoint = new Point(Main_Panel.HorizontalScroll.Value + PointTemp.X, Main_Panel.VerticalScroll.Value + PointTemp.Y);
Main_Panel.AutoScrollPosition = ResultPoint;
RecordScrollPosition();
#endregion 右键拖动思维导图
}
else if (Control.MouseButtons == MouseButtons.Left)
{
if (IsMindMapNode) //是否在节点中进行左键拖拽
{
//是：拖拽节点
MindMapNodeContent.MindMapNodeContentBase ContentControl = ((Control)sender).GetNodeContent();
if (ContentControl == null)
{
return;
}
ContentControl.DoDragDrop(ContentControl, DragDropEffects.Move);
}
else
{
//不是：就拖拽出矩形框框
#region 画出矩形
Selected_Top_panel.Location = PanelLocation;
Selected_Top_panel.Width = PanelSize.Width;
Selected_Left_panel.Location = PanelLocation;
Selected_Left_panel.Height = PanelSize.Height;
Selected_Right_panel.Location = new Point(PanelLocation.X + PanelSize.Width, PanelLocation.Y);
Selected_Right_panel.Height = PanelSize.Height;
Selected_Bottom_panel.Location = new Point(PanelLocation.X, PanelLocation.Y + PanelSize.Height);
Selected_Bottom_panel.Width = PanelSize.Width;
#endregion 画出矩形
#region 中框住的节点
//获取所有节点实例
List <MindMapNodeContainer> MindMapNodeContainerTemp = mindMapNode.GetChidrenNode(true);
MindMapNodeContainerTemp.Add(mindMapNode);
foreach (MindMapNodeContainer MindMapNodeContaineritem in MindMapNodeContainerTemp)//遍历所有节点实例
{
#region 获取当前节点的坐标和尺寸信息[矩形信息]
Point ContentPoint = MindMapNodeContaineritem.NodeContent.PointToScreen(new Point()); //获取节点屏幕坐标
ContentPoint = Scroll_panel.PointToClient(ContentPoint); //获取节点在控件中的位置
Rectangle RectangleTemp = new Rectangle(ContentPoint, MindMapNodeContaineritem.NodeContent.Size); //获取节点的位置和尺寸信息
#endregion 获取当前节点的坐标和尺寸信息[矩形信息]
#region 被框住就选中或反选节点
if (CurrentRectangle.IntersectsWith(RectangleTemp)) //左键拖出的矩形是否与当前实例有交集
{
if (SelectedNodeList.Contains(MindMapNodeContaineritem)) //如果已经选中了就取消选中
{
MindMapNodeContaineritem.NodeContent.Selected = false;
}
else
{
MindMapNodeContaineritem.NodeContent.Selected = true;
}
}
else
{
if (SelectedNodeList.Contains(MindMapNodeContaineritem))
{
continue;//在拖动之前就已经选中了就不管
}
MindMapNodeContaineritem.NodeContent.Selected = false;
}
#endregion 被框住就选中或反选节点
}
#endregion 中框住的节点
}
}
}
