public static void ClearLine()
{
if (StartPoint != null)
{
StartPoint.RemoveAt(StartPoint.childCount - 1);
}
StartPoint = null;
}
private void ProcessEvents(UnityEngine.Event e)
{
drag = Vector2.zero;
switch (e.type)
{
case EventType.MouseDown:
if (e.button == 0)
{
activeDrag = true;
if (ConnectPoint <T> .StartPoint != null)
{
ShowCreateNodeMenu(e.mousePosition, "", (node) =>
{
if (ConnectPoint <T> .StartPoint.point == Point.In)
{
node.AddNextNode(ConnectPoint <T> .StartPoint.node);
}
else
{
ConnectPoint <T> .StartPoint.node.AddNextNode(node);
}
ConnectPoint <T> .ClearLine();
});
}
}
if (e.button == 1)
{
ConnectPoint <T> .ClearLine();
ShowCreateNodeMenu(e.mousePosition, "Add Node");
}
if (e.button == 2)
{
ConnectPoint <T> .ClearLine();
}
break;
case EventType.MouseUp:
if (e.button == 0)
{
activeDrag = false;
}
break;
case EventType.MouseDrag:
if (e.button == 0 && activeDrag)
{
OnCanvasDrag(e.delta);
}
break;
}
}
public ConnectPoint(Node <T> node, Point point)
{
this.node = node;
this.point = point;
RegisterCallback <MouseDownEvent>((e) =>
{
if (StartPoint != null) // 被连接点
{
if (StartPoint.node != this.node && StartPoint.point != this.point)
{
if (this.point == Point.In)
{
StartPoint.node.AddNextNode(this.node);
}
else
{
this.node.AddNextNode(StartPoint.node);
}
}
ClearLine();
}
else // 连接点
{
StartPoint = this;
var drawLine = new IMGUIContainer(() =>
{
Vector2 p1 = this.transform.position;
Vector2 p2 = UnityEngine.Event.current.mousePosition;
Handles.DrawBezier(
p1,
p2,
p1 + Vector2.left * 50f,
p2 - Vector2.left * 50f,
Color.white,
null,
2f
);
GUI.changed = true;
})
{
transform =
{
position = new Vector2(5, 5),
}
};
Add(drawLine);
}
});
}
private Node()
{
m_NextNodes = new List <Node <T> >();
m_PrevNodes = new List <Node <T> >();
this.RegisterCallback <PointerDownEvent>((a) =>
{
this.BringToFront();
}, TrickleDown.NoTrickleDown);
#region 节点顶部
#region 连接点
connectPointIn = new ConnectPoint <T>(this, Point.In);
connectPointIn.AddToClassList("connectPoint");
connectPointIn.RegisterCallback <PointerDownEvent>((a) => { a.StopPropagation(); });
connectPointOut = new ConnectPoint <T>(this, Point.Out);
connectPointOut.AddToClassList("connectPoint");
connectPointOut.RegisterCallback <PointerDownEvent>((a) => { a.StopPropagation(); });
#endregion
Label label = new Label()
{
text = $"节点",
};
label.AddToClassList("text");
VisualElement title = new VisualElement();
title.AddToClassList("title");
title.RegisterCallback <MouseMoveEvent>((a) =>
{
if (isMove)
{
this.transform.position += (Vector3)a.mouseDelta;
}
});
title.RegisterCallback <PointerDownEvent>((a) =>
{
isMove = true;
});
title.RegisterCallback <PointerUpEvent>((a) =>
{
isMove = false;
});
title.RegisterCallback <PointerEnterEvent>((a) =>
{
isMove = false;
});
title.Add(connectPointIn);
title.Add(label);
title.Add(connectPointOut);
title.RegisterCallback <MouseDownEvent>((v) =>
{
if (v.button == 0 && v.clickCount == 2)
{
if (Contains(m_ContentUI))
{
Remove(m_ContentUI);
}
else
{
Add(m_ContentUI);
}
}
else if (v.button == 1 && v.clickCount == 1)
{
GenericMenu genericMenu = new GenericMenu();
genericMenu.AddItem(new GUIContent("Delete"), false, Delete);
NodeWindow.AddCreateNodeMenu(genericMenu, this.transform.position + new Vector3(150, 60, 0), "Add Next Node", (node) =>
{
AddNextNode(node);
});
NodeWindow.AddCreateNodeMenu(genericMenu, this.transform.position - new Vector3(20, 20, 0), "Add Prev Node", (node) =>
{
node.AddNextNode(this);
});
genericMenu.ShowAsContext();
}
});
#endregion
Add(title);
}