private void AddItemIntoCanvas(BlockControl block)
{
var container = new DesignerItemContainer();
container.Content = block;
block.Container = container;
SetComponent(container, block);
//应用样式
var containerStyle = this.BlockContainerStyle;
if (containerStyle != null)
{
container.Style = containerStyle;
}
container.DataContext = block;
container.SetBinding(Canvas.LeftProperty, new Binding {
Path = new PropertyPath(BlockControl.LeftProperty), Mode = BindingMode.TwoWay
});
container.SetBinding(Canvas.TopProperty, new Binding {
Path = new PropertyPath(BlockControl.TopProperty), Mode = BindingMode.TwoWay
});
_canvas.Children.Add(container);
}
private void RemoveItemFromCanvas(BlockControl block)
{
//先把所有的连接都移除。
foreach (var con in block.Container.Connections)
{
var connection = GetComponent(con) as BlockRelation;
this.Relations.Remove(connection);
}
_canvas.Children.Remove(block.Container);
}
private void _canvas_DragLineCompleted(object sender, CanvasDragLineCompletedEventArgs e)
{
var source = BlockControl.GetBlockControl(e.Source);
var sink = BlockControl.GetBlockControl(e.Sink);
var relation = new BlockRelation
{
FromBlock = source.TypeFullName,
ToBlock = sink.TypeFullName
};
this.Relations.Insert(0, relation);
this.OnRelationAdded(relation);
}
/// <summary>
/// 绑定 From、To
/// </summary>
/// <param name="from"></param>
/// <param name="to"></param>
private void BindBlocks()
{
ResetSource();
ResetSink();
_connection.SourceChanged += (o, e) =>
{
var sourceBlock = BlockControl.GetBlockControl(_connection.Source);
this.FromBlock = sourceBlock.TypeFullName;
};
_connection.SinkChanged += (o, e) =>
{
var sinkBlock = BlockControl.GetBlockControl(_connection.Sink);
this.ToBlock = sinkBlock.TypeFullName;
};
}