/// <summary>
/// 选择元素（可多选）
/// </summary>
/// <param name="item"></param>
protected virtual void SelectItem(DiagramItem item)
{
if (Keyboard.Modifiers == ModifierKeys.Control)
{
if (item != null)
{
if (primaryItem != item && allItem.Contains(item))
{
RemoveSelection(item);
}
else
{
AddSelection(item);
}
}
}
else if (Keyboard.Modifiers == ModifierKeys.Shift)
{
if (item != null)
{
AddSelection(item);
}
}
else
{
if (item != null)
{
SetRange(new DiagramItem[] { item });
}
else
{
DoClear();
}
}
}
/// <summary>
/// 选择元素（可多选）
/// </summary>
/// <param name="item"></param>
protected virtual void SelectItem(DiagramItem item)
{
//var sel = View.Selection;
//if (Keyboard.Modifiers == ModifierKeys.Control)
//{
// if (item != null && item.CanSelect)
// {
// if (item.IsSelected)
// sel.Remove(item);
// else
// sel.Add(item);
// }
//}
//else if (Keyboard.Modifiers == ModifierKeys.Shift)
//{
// if (item != null && item.CanSelect)
// sel.Add(item);
//}
//else
//{
// if (item != null && item.CanSelect)
// sel.Set(item);
// else
// sel.Clear();
//}
}
/// <summary>
/// 移除一个节点
/// </summary>
/// <param name="item"></param>
public void RemoveSelection(DiagramItem item)
{
if (allItem.Contains(item))
{
allItem.Remove(item);
}
}
public ControlAdorner(DiagramItem item, Control control)
: base(item)
{
this.control = control;
control.DataContext = item;
visuals = new VisualCollection(this);
visuals.Add(control);
}
/// <summary>
/// 当鼠标按下时没修改按下元素和按下位置
/// </summary>
/// <param name="e"></param>
public void OnMouseDown(object sender, MouseButtonEventArgs e)
{
IInputElement element = sender as IInputElement;
MouseDownItem = (e.OriginalSource as DependencyObject).FindParent <DiagramItem>();
MouseDownPoint = e.GetPosition(element);
e.Handled = true;
}
/// <summary>
/// 清除所有选择（内部方法）
/// </summary>
private void DoClear()
{
foreach (DiagramItem item in allItem)
{
item.AllFeature.DoFeatureEvent("DeselectItem");
}
allItem.Clear();
primaryItem = null;
}
/// <summary>
/// 添加一个节点
/// </summary>
/// <param name="item"></param>
public void AddSelection(DiagramItem item)
{
if (!allItem.Contains(item))
{
bool isPrimary = Count == 0;
allItem.Add(item);
if (isPrimary)
{
primaryItem = item;
}
}
}
/// <summary>
/// 当鼠标移动时触发
/// 如果选中元素，执行拖动方法
/// 如果没有选中元素。创建一个选择框
/// </summary>
/// <param name="e"></param>
public void OnMouseMove(object sender, MouseEventArgs e)
{
if (e.LeftButton == MouseButtonState.Pressed && MouseDownPoint.HasValue)
{
if (MouseDownItem == null)
{
(view.AllFeature["AddAdorner"] as AddAdornerFeature).SetPublicAdorner("Drag", CreateRubberbandAdorner((view as DiagramView)));
}
MouseDownItem = null;
MouseDownPoint = null;
}
e.Handled = true;
}
void CreateNode(string elementType, Point p)
{
Console.WriteLine("CreateNode");
string TestNodeName = allNodes.Count.ToString();
NodeModelBase nodeModel = NodeModelBase.GetNodeModel(TestNodeName, elementType);
DiagramItem node = NodeViewModelBase.GetNodeViewModel(nodeModel).GetCompleteNode();
node.Width = 100;
node.Height = 50;
node.SetValue(Canvas.LeftProperty, p.X - 50);
node.SetValue(Canvas.TopProperty, p.Y - 25);
AddNode(TestNodeName, node);
}
/// <summary>
/// 当鼠标移动时触发
/// 如果选中元素，执行拖动方法
/// 如果没有选中元素。创建一个选择框
/// </summary>
/// <param name="e"></param>
public virtual void OnMouseMove(MouseEventArgs e)
{
if (e.LeftButton == MouseButtonState.Pressed && MouseDownPoint.HasValue)
{
if (MouseDownItem != null)
{
View.DragTool.BeginDrag(MouseDownPoint.Value, MouseDownItem, DragThumbKinds.Center);
}
else
{
View.Selection.Clear();
(View.AllFeature["AddAdorner"] as AddAdornerFeature).SetPublicAdorner("Drag", CreateRubberbandAdorner());
}
MouseDownItem = null;
MouseDownPoint = null;
}
e.Handled = true;
}
/// <summary>
/// 开始拖拽
/// </summary>
/// <param name="start"></param>
/// <param name="item"></param>
/// <param name="kind"></param>
public virtual void BeginDrag(Point start, DiagramItem item, DragThumbKinds kind)
{
//this.start = start;
//DragKind = kind;
//if (kind == DragThumbKinds.Center)
//{
// if (!item.CanMove || !IsMovable(item))
// return;
// if (!view.Selection.Contains(item))
// view.Selection.Set(item);
// DragItems = view.Selection.Where(p => p.CanMove && IsMovable(p)).ToArray();
//}
//else
//{
// DragItems = new DiagramItem[] { item };
//}
//InitialBounds = DragItems.Select(p => p.Bounds).ToArray();
//view..DragAdorner = CreateAdorner();
}
/// <summary>
/// 选中事件，可以选中一个或多个
/// </summary>
/// <param name="items"></param>
public void SetRange(IEnumerable <DiagramItem> items)
{
DoClear(); //清除所有
bool isPrimary = true; //第一个节点是主要节点
foreach (var item in items)
{
allItem.Add(item); //将节点添加到字典中;//设为被选中
if (isPrimary) //是否为主节点
{
primaryItem = item;
item.AllFeature.DoFeatureEvent("SelectedItem", true);
isPrimary = false;
}
else
{
item.AllFeature.DoFeatureEvent("SelectedItem");
}
}
}
/// <summary>
/// 开始拖拽
/// </summary>
/// <param name="start"></param>
/// <param name="item"></param>
/// <param name="kind"></param>
public virtual void BeginDrag(Point start, DiagramItem item, DragThumbKinds kind)
{
Start = start;
DragKind = kind;
if (kind == DragThumbKinds.Center)
{
if (!IsMovable(item))
{
return;
}
if (!View.Selection.Contains(item))
{
View.Selection.Set(item);
}
//DragItems = View.Selection.Where(p => p.CanMove && IsMovable(p)).ToArray();
}
else
{
DragItems = new DiagramItem[] { item };
}
InitialBounds = DragItems.Select(p => p.Bounds).ToArray();
//View.DragAdorner = CreateAdorner();
}
/// <summary>
/// 是否包含某个节点
/// </summary>
/// <param name="item"></param>
/// <returns></returns>
public bool Contains(DiagramItem item)
{
return(allItem.Contains(item));
}
public void AddNode(string itemName, DiagramItem item)
{
allNodes.Add(itemName, item);
(view as Canvas).Children.Add(item);
}
/// <summary>
/// 返回对应的元素是否允许拖动
/// </summary>
/// <param name="item"></param>
/// <returns></returns>
protected bool IsMovable(DiagramItem item)
{
return(!(item is LinkBase));
}
/// <summary>
/// 当鼠标按下时没修改按下元素和按下位置
/// </summary>
/// <param name="e"></param>
public virtual void OnMouseDown(MouseButtonEventArgs e)
{
MouseDownItem = (e.OriginalSource as DependencyObject).FindParent <DiagramItem>();
MouseDownPoint = e.GetPosition(View);
e.Handled = true;
}