local UIPreviewEditor = class("UIPreviewEditor" , require("Editor"));

function UIPreviewEditor:ctor()
	UIPreviewEditor.super.ctor(self);
	-- 挂接UI的根节点
	self.node = nil
end

function UIPreviewEditor:activate()
	UIPreviewEditor.super.activate(self);
	-- 恢复场景的位置
	app.mainScene:setPosition(cc.p(0,0));
	-- 恢复下场景的缩放
	app.setting.ScreenScale = 1;
	app.mainScene:setScale(app.setting.ScreenScale);
	app.setting.OriginAnchor = cc.p(0,0);
	app.setting.SourceNodeNum = 0;
	app.setting.TargetNodeNum = 0;
	app:refreshSetting();

	self.mBackgroundNode = self:createUIBackground();
	app.mainLayer:addChild(self.mBackgroundNode , -100);
end

function UIPreviewEditor:unactivate()
	UIPreviewEditor.super.unactivate(self);
	self:closeNode()
	if self.mBackgroundNode then
		self.mBackgroundNode:removeFromParent();
		self.mBackgroundNode = nil;
	end
end

-- 关闭当前打开的UI
function UIPreviewEditor:closeNode()
	if self.node then
		self.node:removeFromParent();
		self.node = nil;
	end
end

-- 从文件载入节点
function UIPreviewEditor:loadNode(nodeFile)
	self:closeNode();
	self.node = tolua.cast(cc.StreamObject:loadFromFile(nodeFile) , "cc.Node3D");
	self:initNode(self.node);
	return self.node;	
end

-- 创建UI底图
function UIPreviewEditor:createUIBackground()
	local glNode  = gl.glNodeCreate()
	glNode:setAnchorPoint(cc.p(0, 0))
	
	local function primitivesDraw(transform, transformUpdated)
		local node = self.node;
		if node then
			-- 绑定相机、世界矩阵
			cc.DrawPrimitives.setCamera(cc.Director:getInstance():getActiveCamera());
			cc.DrawPrimitives.setWorldTransform(node:getNodeToWorldTransform());

			-- 画矩形
			local rect = cc.rect(0 , 0 , node:getContentSize().width , node:getContentSize().height);
			cc.DrawPrimitives.drawSolidRect(cc.p(rect.x , rect.y), cc.p(rect.x + rect.width , rect.y + rect.height) , cc.c4f(0.6,0.6,0.6,1))

			-- 状态恢复
			gl.lineWidth(1)
			cc.DrawPrimitives.drawColor4B(255,255,255,255)
			cc.DrawPrimitives.setPointSize(1)
		end
	end

	glNode:registerScriptDrawHandler(primitivesDraw)
	return glNode;
end

function UIPreviewEditor:play()
	UIPreviewEditor.super.play(self)
	if self.node then
		self.node:playCurveAnimation();
		if self.node.stop then
			self.node:stop();
		end
		if self.node.play then
			self.node:play();
		end
		
		-- UIEffectNode需要重新播放下
		local function visit(node)
			if node.stop then
				node:stop()
			end
			if node.play then
				node:play()
			end
		end
		self.node:visitNode(visit);
	end
end

function UIPreviewEditor:stop()
	if self.node then
		self.node:stopCurveAnimation();
		if self.node.stop then
			self.node:stop();
		end
	end
end

-- 创建新的光效
function UIPreviewEditor:newNode()
	local node = self:createNode("Layout");
	self:initNode(node)
	node:ignoreContentAdaptWithSize(false);
	node:setSizeType(1);
	node:setSizePercent(cc.p(1,1));
	node:setAnchorPoint(cc.p(0,0));
	node:setBackGroundColorType(cc.LayoutBackGroundColorType.none);
	return node;
end

-- 初始化光效，添加到场景中
function UIPreviewEditor:initNode(node)
	self.node = node
	app.mainLayer:addChild(self.node)
	-- 默认播放更节点的动画
	if app.setting.PlayUIAnimation then
		self.node:playCurveAnimation()
	end
end

function UIPreviewEditor:relayoutAll()
		local function onNode(node)
		if type(node.requestDoLayout) == "function" then
			node:requestDoLayout();
		end
		return true;
	end
	-- 遍历所有子节点，把子UI取出来统一放在Items里
	if self.node then	
		self.node:visitNode(onNode);
	end
end

-- 属性改变通知
function UIPreviewEditor:onPropertyValueChanged(propName , newValue , oldValue)
	self:relayoutAll();
end

function UIPreviewEditor:createNode(nodeType)
	local node = UIPreviewEditor.super.createNode(self , nodeType);
	if node.enableAutoPlay then
		node:enableAutoPlay();
	end
	return node;
end

-- 各个派生类可以重写这个函数
function UIPreviewEditor:save(filename)
	self.node:recalcAllPList();
	UIPreviewEditor.super.save(self, filename);
	local images = self.node:collectAllImage();
	if images then
		local msg = "保存UI" .. filename .. "成功，这个UI用到了这些图片：\r\n";
		for i , v in pairs(images) do
			msg = msg .. i .. " 用了 " .. v .. " 次\r\n";
		end
		alert(msg);
	end
end

return UIPreviewEditor;