Delete DrawObject

Archived
1

If i use DrawObject in roScreen, is possibile delete this object in a second time?


    screen = CreateObject("roScreen")
    screen.SetMessagePort(port)
    screen.Clear(&hFFFFFF00)
    bitmap=CreateObject("roBitmap", "pkg:/images/header.png")
    id = screen.DrawObject(0, 124, bitmap)   'this line is bad, how i replace it for get id of element?
    screen.show()

   ' ========= HOW REPLACE THIS BAD CODE WITH CORRECT CODE? EXAMPLE DELETE DRAWOBJECT IF I PRESS UP BUTTON ======== 
    while true
        msg = wait(0, port)
        if type(msg) = "roUniversalControlEvent" then
            code = msg.GetInt()
            
            if (code = 0) 'back button
                return -1
            else if (code = 2) 'up button
                screen.DeleteObject(id)   'this line is bad, how i replace it for delete element from id?
            end if
            
        end if
    end while
    '=============================================
2 
showobject = 1

 while true
 if showobject = 1
     screen.drawobject(0,0, object)
  end if

 if (code = 2) 'up button
     showobject = 0
  end if
 end while
3

Generally with roScreen, when you want to change anything on the screen, you redraw the entire screen. So to “delete” an object, you just redraw the screen without drawing that object.

–Mark