MoveLockedMode = 
{
no = 0;
x = 1;
y = 2;
}

-- 2D平移工具功能
local Move2DTool = class("Move2DTool", require("MoveTool"))
function Move2DTool:ctor()

	-- 当前锁定模式
	self.lockedMode = MoveLockedMode.no;

	self.super.ctor(self);
end

function Move2DTool:clear()
	self.super.clear(self);
end

function Move2DTool:MouseDown(button , x , y)
	self.super.MouseDown(self, button, x, y)
end

local function roundVec3(vec)
	vec.x = math.floor(vec.x + 0.5)
	vec.y = math.floor(vec.y + 0.5)
	vec.z = math.floor(vec.z + 0.5)
	return vec;
end


-- 根据Shift键决定锁定哪个轴，并返回移动目标
function Move2DTool:getMoveEndPos(screenX , screenY)
	-- 转换坐标，将屏幕坐标转换成GLView的坐标
	local startPos = app.visibleRect:convertScreenToGLView(self.startPos.x , self.startPos.y);
	local endPos = app.visibleRect:convertScreenToGLView(screenX , screenY);

	local key = app.cs.getModifierKeys();
	-- Shift锁定横竖移动
	if key == Keys.Shift then
		if self.lockedMode == MoveLockedMode.no then
			-- x 方向移动的距离更远
			if math.abs(endPos.x - startPos.x) > math.abs(endPos.y - startPos.y) then
				self.lockedMode = MoveLockedMode.x;
			else
				self.lockedMode = MoveLockedMode.y;
			end
		end
		-- x 方向移动的距离更远
		if self.lockedMode == MoveLockedMode.x then
			endPos.y = startPos.y;
		else
			endPos.x = startPos.x;
		end
	else
		self.lockedMode = MoveLockedMode.no;
	end
	return {startPos = startPos , endPos =endPos};
end

function Move2DTool:moveTo(screenX, screenY)
	-- 转换坐标，将屏幕坐标转换成GLView的坐标
	local startEndPos = self:getMoveEndPos(screenX , screenY);
	local startPos = startEndPos.startPos;
	local endPos = startEndPos.endPos;

	-- 通过命令来移动	
	local scale = app.setting.ScreenScale;
	local scale = app.setting.ScreenScale;
	local offset = cc.pSub(endPos , startPos)
	-- 增量
	local targetOffset = cc.vec3(offset.x / scale, offset.y / scale, 0);
	for i , v in pairs(self.originPoies) do
		local originWorld = i:getParent():convertToWorldSpace(v.pos);
		local newWorld = cc.vec3Add(originWorld , targetOffset);
		local newLocal = roundVec3(i:getParent():convertToNodeSpace(newWorld));
		
		i:setTranslation(newLocal);
	end		
end

function Move2DTool:commandMoveTo(screenX, screenY)
	-- 转换坐标，将屏幕坐标转换成GLView的坐标
	local startEndPos = self:getMoveEndPos(screenX , screenY);
	local startPos = startEndPos.startPos;
	local endPos = startEndPos.endPos;
	-- 如果没有发生偏移则不需要移动
	if cc.pEqual(endPos, startPos) then
		return;
	end
		
	-- 通过命令来移动
	local commands = {};
	local scale = app.setting.ScreenScale;
	local offset = cc.pSub(endPos , startPos);
	-- 增量
	local targetOffset = cc.vec3(offset.x / scale, offset.y / scale, 0);
	
	for i , v in pairs(self.originPoies) do
		local originWorld = i:getParent():convertToWorldSpace(v.pos);
		local newWorld = cc.vec3Add(originWorld , targetOffset);
		local newLocal = roundVec3(i:getParent():convertToNodeSpace(newWorld));
		
		-- 将节点的位置恢复到原始位置
		i:setTranslation(v.pos);
		table.insert(commands, Commands:moveNode(i, newLocal));
	end
	
	app.undoRedoManager:doCommand(Commands:batchCommand(commands));
end

function Move2DTool:commandMoveBy(offset)
	-- 如果没有发生偏移则不需要移动
	if cc.pEqual(offset, {x = 0, y = 0}) then
		return;
	end
	
	-- 增量
	local scale = app.setting.ScreenScale;
	local targetOffset = cc.vec3(offset.x, offset.y, 0);
	
	-- 通过命令来移动
	local commands = {};
	for i , v in pairs(app.editor.SelectedNodes) do
		local originWorld = v:getParent():convertToWorldSpace(v:getPosition());
		local newWorld = cc.vec3Add(originWorld , targetOffset);
		local newLocal = roundVec3(v:getParent():convertToNodeSpace(newWorld));

		-- v:setPosition(newLocal);
		table.insert(commands, Commands:moveNode(v, newLocal));
	end
	
	app.undoRedoManager:doCommand(Commands:batchCommand(commands));
end	

return Move2DTool;