void LeftGroup()
{
var leftRect = new Rect(0, 0, position.width * midLinePos, position.height);
GUI.BeginGroup(leftRect);
if (backTex != null)
{
var xTex = leftRect.width / backTex.width;
var yTex = leftRect.height / backTex.height;
var xStart = viewOffset.x.Fix(-backTex.width, 0, backTex.width);
var yStart = viewOffset.y.Fix(-backTex.height, 0, backTex.height);
for (int x = 0; x <= xTex + 1; x++)
{
for (int y = 0; y <= yTex + 1; y++)
{
GUI.DrawTexture(new Rect(xStart + backTex.width * x, yStart + backTex.height * y, backTex.width, backTex.height), backTex);
}
}
}
else
{
//Debug.LogError("background.png is null");
backTex = Resources.Load <Texture2D>("background");
//backTex=Resources.Load<Texture2D>("background.png");
}
//遍历所有节点，移除无效节点
for (int i = nodeRootList.Count - 1; i >= 0; --i)
{
if (nodeRootList[i].isRelease)
{
nodeRootList.RemoveAt(i);
}
}
if (curEvent.button == 1) // 鼠标右键
{
if (curEvent.type == EventType.MouseDown)
{
if (!makeTransitionMode)
{
bool clickedOnNode = false;
selectNode = GetMouseInNode();
clickedOnNode = (selectNode != null);
if (!clickedOnNode)
{
ShowMenu(0);
}
else
{
ShowMenu(1);
}
}
}
}
// 选择节点为空时，无法连线
if (selectNode == null)
{
makeTransitionMode = false;
}
if (!makeTransitionMode)
{
if (curEvent.type == EventType.MouseUp)
{
selectNode = null;
}
}
// 在连线状态，按下鼠标
if (makeTransitionMode && curEvent.type == EventType.MouseDown)
{
NodeView <DataT> newSelectNode = GetMouseInNode();
// 如果按下鼠标时，选中了一个节点，则将 新选中根节点 添加为 selectNode 的子节点
if (newSelectNode == null)
{
}
else
if (selectNode != newSelectNode)
{
selectNode.AddChild(newSelectNode);
}
// 取消连线状态
makeTransitionMode = false;
// 清空选择节点
selectNode = null;
}
// 连线状态下 选择节点不为空
if (makeTransitionMode && selectNode != null)
{
ViewTool.DrawCurve(selectNode.windowRect.GetPos(Dir.right), mousePos);
}
// 开始绘制节点
// 注意：必须在 BeginWindows(); 和 EndWindows(); 之间 调用 GUI.Window 才能显示
BeginWindows();
for (int i = 0; i < nodeRootList.Count; i++)
{
NodeView <DataT> nodeView = nodeRootList[i];
nodeView.windowRect = GUI.Window(i, nodeView.windowRect, DrawNodeWindow, "");
nodeView.DrawToChildCurve();
}
EndWindows();
if (curEvent.button == 0)
{
if (curEvent.type == EventType.MouseDrag)
{
selectNode = GetMouseInNode();
if (selectNode == null)
{
viewOffset += curEvent.delta;
}
}
}
GUI.EndGroup();
}