private void DrawLine(MDF_ConnectItemModel from, MDF_ConnectItemModel to)
{
if (from == null || to == null)
{
return;
}
MDF_Line line = CreateLine(new MDF_ConnectLineModel()
{
From = from.Key, To = to.Key
});
if (line == null)
{
return;
}
ComputeLineInfo(line);
if (LineSource == null)
{
LineSource = new ObservableCollection <MDF_ConnectLineModel>();
}
LineSource.Add(line.DataContext as MDF_ConnectLineModel);
SelectedItem = null;
this.UpdateLayout();
}
/// <summary>
/// 删除线
/// </summary>
/// <param name="model"></param>
private void DeleteLine(MDF_ConnectLineModel model)
{
if (canvasLine == null)
{
return;
}
if (model == null)
{
return;
}
MDF_Line line = canvasLine.Children.FirstOrDefault(p => ((p as FrameworkElement).DataContext as MDF_ConnectLineModel) == model) as MDF_Line;
if (line == null)
{
return;
}
if (LineCheck != null && !LineCheck.DeleckLine(model))
{
return;
}
line.LineSelected -= line_LineSelected;
canvasLine.Children.Remove(line);
LineSource.Remove(model);
}
private MDF_Line CreateLine(MDF_ConnectLineModel linemodel)
{
if (canvasLine == null)
{
return(null);
}
if (LineSource == null)
{
return(null);
}
if (m_dicitem.Where(p => p.Key == linemodel.From).Count() == 0)
{
return(null);
}
if (m_dicitem.Where(p => p.Key == linemodel.To).Count() == 0)
{
return(null);
}
ConnectItem from = m_dicitem[linemodel.From];
ConnectItem to = m_dicitem[linemodel.To];
if (from == null || to == null)
{
return(null);
}
if (LineCheck != null)
{
if (!LineCheck.AddLineCheck(from.DataContext as MDF_ConnectItemModel, to.DataContext as MDF_ConnectItemModel))
{
return(null);
}
}
//判断是否已存在，如果存在则执行创建线
var v = canvasLine.Children.FirstOrDefault(p => ((p as MDF_Line).DataContext as MDF_ConnectLineModel).From == linemodel.From &&
((p as MDF_Line).DataContext as MDF_ConnectLineModel).To == linemodel.To);
if (v != null)
{
return(null);
}
MDF_Line line = new MDF_Line();
line.SetBinding(MDF_Line.StyleProperty, new Binding()
{
Source = this, Path = new PropertyPath("LineStyle")
});
line.DataContext = linemodel;
canvasLine.Children.Add(line);
ComputeLineInfo(line);
line.LineSelected += line_LineSelected;
return(line);
}
private void SetLineSelected(MDF_ConnectLineModel model, MDF_ConnectLineModel oldvalue)
{
if (oldvalue != null)
{
MDF_Line oldline = canvasLine.Children.FirstOrDefault(p => ((p as MDF_Line).DataContext as MDF_ConnectLineModel) == oldvalue) as MDF_Line;
if (oldline != null)
{
oldline.Selected = false;
}
}
if (model == null)
{
return;
}
if (canvasLine == null)
{
return;
}
MDF_Line line = canvasLine.Children.FirstOrDefault(p => ((p as MDF_Line).DataContext as MDF_ConnectLineModel) == model) as MDF_Line;
if (line == null)
{
return;
}
line.Selected = true;
}
//计算线位置
private void ComputeLineInfo(MDF_Line line)
{
if (line == null)
{
return;
}
MDF_ConnectLineModel model = line.DataContext as MDF_ConnectLineModel;
if (model == null)
{
return;
}
if (gridMain == null || canvasLine == null)
{
return;
}
if (m_dicitem.Count == 0)
{
return;
}
if (m_dicitem.Keys.Contains(model.From) && m_dicitem.Keys.Contains(model.To))
{
ConnectItem from = m_dicitem[model.From];
ConnectItem to = m_dicitem[model.To];
if (from == null || to == null)
{
return;
}
//计算控件坐标点
if (from.ActualHeight == 0)
{
return;
}
if (canvasLine.ActualHeight == 0)
{
return;
}
List <Point> pfromlist = SLControlUnity.GetControlPointLeftRight(canvasLine, from);
List <Point> ptolist = SLControlUnity.GetControlPointLeftRight(canvasLine, to);
Tuple <Point, Point> nearpoint = SLControlUnity.ComplateNearPoint(pfromlist, ptolist); //得到最近两个点
double len = SLControlUnity.Distance(nearpoint.Item1, nearpoint.Item2); //得到两点最近距离
double angle = SLControlUnity.SlopeAngle(nearpoint.Item1, nearpoint.Item2); //计算两点倾斜角度
Canvas.SetLeft(line, nearpoint.Item1.X);
Canvas.SetTop(line, nearpoint.Item1.Y - line.ActualHeight / 2);
line.Width = len;
CompositeTransform transform = line.RenderTransform as CompositeTransform;
if (transform == null)
{
transform = new CompositeTransform();
line.RenderTransform = transform;
}
line.RenderTransformOrigin = new Point(0, 0.5);
//transform.CenterX = 0;
//transform.CenterY = 0.5;
transform.Rotation = angle;
}
}