pc_tiantian/core/luaScript/Tools/Widgets/UIScrollView.lua

cc.ScrollView.ClassName = "ScrollView"

function cc.ScrollView:saveToXmlNode(xmlNode)
	cc.Layout.saveToXmlNode(self , xmlNode);

	xmlNode.BounceEnabled = self:isBounceEnabled();
	xmlNode.Direction = self:getDirection();
	xmlNode.InnerContainerSize = self:getInnerContainerSize();

end

function cc.ScrollView:loadFromXmlNode(xmlNode)
	cc.Layout.loadFromXmlNode(self , xmlNode);
    self:setBounceEnabled(xmlNode.BounceEnabled);
    self:setDirection(xmlNode.Direction);
    self:setInnerContainerSize(xmlNode.InnerContainerSize);
end


function cc.ScrollView:extend(node)
	cc.Layout:extend(node);	
	node:setName("ScrollView");

	local vBar = node:getVBar();
	vBar:setBackGroundImage("jindutiao_01.png" , cc.TextureResType.plistType);
    vBar:setProgressImage("res/ui/zy_tongyong/jindutiao_1.png");
	
	local hBar = node:getHBar();
	hBar:setBackGroundImage("jindutiao_01.png" , cc.TextureResType.plistType);
	hBar:setProgressImage("res/ui/zy_tongyong/jindutiao_1.png");
	
	-- 0.1Ӣէ
	node:setChildFocusCancelOffset(cc.Device:getDPI() * 0.1);
end

function cc.ScrollView:hideAllBar()
	local vBar = self:getVBar();
	vBar:setVisible(false)
		
	local hBar = self:getHBar();
	hBar:setVisible(false)
end

function cc.ScrollView:jumpToTopOnSizeChanged()
	local function onEvent(ui, eventType)
		if eventType == 3 then
			self:jumpToTop();
		end
	end	
	self:getInnerContainer():setWidgetEventListener(onEvent)
end

function cc.ScrollView:jumpToBottomOnSizeChanged()
	local function onEvent(ui, eventType)
		if eventType == 3 then
			self:jumpToBottom();
		end
	end	
	self:getInnerContainer():setWidgetEventListener(onEvent)
end

-- ܱփؓޚ֣քλ׃љؖ҈ìࠉӔԃ4ַԃjumpToPercentHorizontalìscrollToֈگ˽ì׵ܘքˇ{x = [0-100] , y = [0-100]};
function cc.ScrollView:getCenterPercent(childNode)
	local world = childNode:getWorldTranslation();
	local size = childNode:getContentSize();
	local anchor = childNode:getAnchorPoint();
	world.x = world.x + (size.width) / 2;
	world.y = world.y + (size.height) / 2;
	local nodePos = self:getInnerContainer():convertToNodeSpace(world);
	local percent = self:getPercent(nodePos);
	return cc.p(percent.x * 100 , percent.y * 100);
end

-- Ƀ֢ٶޚ֣ߓא
function cc.ScrollView:scrollXToCenter(childNode , scrollTime)
	local x = self:getCenterPercent(childNode).x;
	--print("xxxx" , x , childNode:getPosition().x);
	self:scrollToPercentHorizontal(x , scrollTime , true);
end

-- Ƀ֢ٶޚ֣ߓא
function cc.ScrollView:scrollYToCenter(childNode , scrollTime)
	self:scrollToPercentVertical(self:getCenterPercent(childNode).y , scrollTime , true);
end

-- 获得子节点的位置百分比，可以用来调用jumpToPercentHorizontal，scrollTo等函数，返回的是{x = [0-100] , y = [0-100]};
function cc.ScrollView:getChildPercent(childNode)
	local world = childNode:getPosition();
	local nodeSize = childNode:getContentSize();
	local anchor = childNode:getAnchorPoint();
	world.x = world.x - (nodeSize.width) * anchor.x;
	world.y = world.y - (nodeSize.height) * anchor.y;
	local innerSize = self:getInnerContainerSize();
	local size = self:getSize();
	-- scrollView最下面是0位置而百分比上面是0
	world.y = innerSize.height - world.y - nodeSize.height
	local perscent = cc.p(0,0)
	local remainSize = cc.size(innerSize.width - size.width, innerSize.height - size.height)
	if remainSize.width == 0 then
		perscent.x = 0
	else
		perscent.x = world.x / remainSize.width
	end
	
	if remainSize.height == 0 then
		perscent.y = 0
	else
		perscent.y = world.y / remainSize.height
	end
	
	if perscent.x > 1 then
		perscent.x = 1
	end
	if perscent.y > 1 then
		perscent.y = 1
	end
	return cc.p(perscent.x * 100 , perscent.y * 100);
end

-- 滚动到节点所在的位置
function cc.ScrollView:scrollXToChild(childNode , scrollTime)
	local x = self:getChildPercent(childNode).x;
	--print("xxxx" , x , childNode:getPosition().x);
	self:scrollToPercentHorizontal(x , scrollTime , true);
end

-- 滚动到节点所在的位置
function cc.ScrollView:scrollYToChild(childNode , scrollTime)
	self:scrollToPercentVertical(self:getChildPercent(childNode).y , scrollTime , true);
end

function cc.ScrollView:createNode()
	local layer = cc.ScrollView:create();
	return layer;
end

-- ʨ׃Ĭɏֵ
function cc.ScrollView:setDefaults()
	cc.Layout.setDefaults(self);
	self:setBackGroundColor(cc.c3b(255,150,100));
    self:setBounceEnabled(true);
	self:loadDefaults();
	-- ĬɏѨҪЬӦtouch˂ݾ
	self:setTouchEnabled(true)
end

function cc.ScrollView:loadDefaults()
	self:addProtectedChild(self:createTouchSizeDrawer());
end

-- ԴݨԴݨڶ֯ȸԲ
function cc.ScrollView:createTouchSizeDrawer()
	local glNode  = gl.glNodeCreate()
	glNode:setAnchorPoint(cc.p(0, 0))
	
	local function primitivesDraw(transform, transformUpdated)
		local isStencilEnabled = gl.isEnabled(gl.STENCIL_TEST)
		if isStencilEnabled then
			gl.disable(gl.STENCIL_TEST);
		end
		local isScissorEnabled = gl.isEnabled(gl.SCISSOR_TEST)
		if isScissorEnabled then
			gl.disable(gl.SCISSOR_TEST);
		end
		-- ѳ֨Рܺbˀާߘֳ
		cc.DrawPrimitives.setCamera(self:getActiveCamera());
		cc.DrawPrimitives.setWorldTransform(transform);
		-- ۭߘю
		gl.lineWidth(1)
		cc.DrawPrimitives.drawColor4B(255,255,255,255)
		local rect = cc.rect(0,self:getSize().height,self:getInnerContainerSize().width,-self:getInnerContainerSize().height);
		cc.DrawPrimitives.drawRect(cc.p(rect.x , rect.y), cc.p(rect.x + rect.width , rect.y + rect.height))

		-- ״̬ܖش
		gl.lineWidth(1)
		cc.DrawPrimitives.drawColor4B(255,255,255,255)
		cc.DrawPrimitives.setPointSize(1)

		if isStencilEnabled then
			gl.enable(gl.STENCIL_TEST);
		end
		if isScissorEnabled then
			gl.enable(gl.SCISSOR_TEST);
		end
	end

	glNode:registerScriptDrawHandler(primitivesDraw)
	return glNode;
end