オブジェクトをドラッグアンドドロップするための良いコンテナを作る方法（コロナSDK）？

Question

私はコロナSDKを初めて使用しています。

私はアプリケーションのドラッグアンドドロップを使ってテストを実装しています。

私は、近くにあるドラッグオブジェクトを「引き付ける」コンテナのコー​​ドを作成しました。

display.setStatusBar(display.HiddenStatusBar) 

local posX, posY = 100, 200 
local sizeX, sizeY = 150, 100 

local container = display.newRect(posX, posY, sizeX, sizeY) 
container:setFillColor(255,0,0) 
container.strokeWidth = 3 
container:setStrokeColor(100, 100, 100) 

local myObject = display.newRect(0, 0, sizeX, sizeY) 
myObject.alpha = 0.6 
myObject:setFillColor(0,0,255) 


-- dcenter, d1, d2, d3, d4 are test points: IF THERE ARE AT LEAST 2 POINTS INSIDE THE TARGET CONTAINER, THAN THE OBJECT WILL BE ATRACTED INTO THE CONTAINER 
-- uncomment the code bellow to see the test points 

-- local dcenter = display.newCircle((sizeX/2) - 1, (sizeY/2) - 1, 2) 
-- dcenter:setFillColor(120,120,120) 
-- 
-- local d1 = display.newCircle((sizeX/2) - (((1/3) * sizeX)/2) - 1, (sizeY/2) - (((1/3) * sizeY)/2) - 1, 2) 
-- d1:setFillColor(120,120,120) 
-- 
-- local d2 = display.newCircle((sizeX/2) - (((1/3) * sizeX)/2) - 1, (sizeY/2) + (((1/3) * sizeY)/2) - 1, 2) 
-- d2:setFillColor(120,120,120) 
-- 
-- local d3 = display.newCircle((sizeX/2) + (((1/3) * sizeX)/2) - 1, (sizeY/2) - (((1/3) * sizeY)/2) - 1, 2) 
-- d3:setFillColor(120,120,120) 
-- 
-- local d4 = display.newCircle((sizeX/2) + (((1/3) * sizeX)/2) - 1, (sizeY/2) + (((1/3) * sizeY)/2) - 1, 2) 
-- d4:setFillColor(120,120,120) 


-- touch listener function 
function myObject:touch(event) 
    if event.phase == "began" then 

     self.markX = self.x -- store x location of object 
     self.markY = self.y -- store y location of object 

    elseif event.phase == "moved" then 

     local x = (event.x - event.xStart) + self.markX 
     local y = (event.y - event.yStart) + self.markY 

     self.x, self.y = x, y -- move object based on calculations above 

     -- uncomment the code bellow to see the test points (following myObject) 
     -- dcenter.x, dcenter.y = x, y 
     -- d1.x, d1.y = x - (((1/3) * sizeX)/2), y - (((1/3) * sizeY)/2) 
     -- d2.x, d2.y = x - (((1/3) * sizeX)/2), y + (((1/3) * sizeY)/2) 
     -- d3.x, d3.y = x + (((1/3) * sizeX)/2), y - (((1/3) * sizeY)/2) 
     -- d4.x, d4.y = x + (((1/3) * sizeX)/2), y + (((1/3) * sizeY)/2) 

     if (((x >= ((sizeX/2) + posX - ((2/3) * sizeX))) and (y >= ((sizeY/2) + posY - ((1/3) * sizeY))) and (x <= ((sizeX/2) + posX + ((2/3) * sizeX))) and (y <= ((sizeY/2) + posY + ((1/3) * sizeY)))) or ((x >= ((sizeX/2) + posX - ((1/3) * sizeX))) and (y >= ((sizeY/2) + posY - ((2/3) * sizeY))) and (x <= ((sizeX/2) + posX + ((1/3) * sizeX))) and (y <= ((sizeY/2) + posY + ((2/3) * sizeY)))) or ((x >= ((sizeX/2) + posX - ((1/2) * sizeX))) and (y >= ((sizeY/2) + posY - ((1/2) * sizeY))) and (x <= ((sizeX/2) + posX + ((1/2) * sizeX))) and (y <= ((sizeY/2) + posY + ((1/2) * sizeY))))) then 
      container:setFillColor(100,0,0) 
     else 
      container:setFillColor(255,0,0) 
     end 

    elseif event.phase == "ended" then 

     local x = (event.x - event.xStart) + self.markX 
     local y = (event.y - event.yStart) + self.markY 

     -- main condition: I calculated 3 areas to atract the object to the target container, 2 areas that atract it when it's 1/3 in the target and 1 area that atract it when it's 1/4 in the target 
     if (((x >= ((sizeX/2) + posX - ((2/3) * sizeX))) and (y >= ((sizeY/2) + posY - ((1/3) * sizeY))) and (x <= ((sizeX/2) + posX + ((2/3) * sizeX))) and (y <= ((sizeY/2) + posY + ((1/3) * sizeY)))) or ((x >= ((sizeX/2) + posX - ((1/3) * sizeX))) and (y >= ((sizeY/2) + posY - ((2/3) * sizeY))) and (x <= ((sizeX/2) + posX + ((1/3) * sizeX))) and (y <= ((sizeY/2) + posY + ((2/3) * sizeY)))) or ((x >= ((sizeX/2) + posX - ((1/2) * sizeX))) and (y >= ((sizeY/2) + posY - ((1/2) * sizeY))) and (x <= ((sizeX/2) + posX + ((1/2) * sizeX))) and (y <= ((sizeY/2) + posY + ((1/2) * sizeY))))) then 
      self.x, self.y = posX + (sizeX/2), posY + (sizeY/2); 

      -- uncomment the code bellow to see the test points (following myObject) 
      -- dcenter.x, dcenter.y = posX + (sizeX/2), posY + (sizeY/2) 
      -- d1.x, d1.y = posX - (((1/3) * sizeX)/2) + (sizeX/2), posY - (((1/3) * sizeY)/2) + (sizeY/2) 
      -- d2.x, d2.y = posX - (((1/3) * sizeX)/2) + (sizeX/2), posY + (((1/3) * sizeY)/2) + (sizeY/2) 
      -- d3.x, d3.y = posX + (((1/3) * sizeX)/2) + (sizeX/2), posY - (((1/3) * sizeY)/2) + (sizeY/2) 
      -- d4.x, d4.y = posX + (((1/3) * sizeX)/2) + (sizeX/2), posY + (((1/3) * sizeY)/2) + (sizeY/2) 
     end 

    end 

    return true 
end 


myObject:addEventListener("touch", myObject) 

すでにいくつかのAPIがあるかどうかを知りたいだけです。

Answer 1

いいえ、APIはありません。また

私はあなたがフォーカスシステムを使用することをお勧めするので、あなたをドラッグしながら、あなたが他のオブジェクトの「タッチ」イベントと相互作用しない...

例：

local function myTouchListener(event) 
    if event.phase == "began" then 
     display.getCurrentStage():setFocus(event.target); 
    elseif event.phase == "ended" then 
     display.getCurrentStage():setFocus(nil); 
    end 
end