View source for Window.redraw

{{lowercase}}
{{Function
|name=window.redraw
|args=
|returns=None
|api=term
|addon=ComputerCraft
|desc=A function available to window-based [[term (API)|terminal objects]] created via the [[window (API)|window API]], which re-renders everything that has been rendered via the window in concern (assuming it is [[window.setVisible|visible]]). This includes content rendered via child windows.

Generally this is handy if one window has written content over the top of the top of another (of which it is ''not'' a child), and you wish to bring the content of the covered window back to the fore-front of your display.

You need not call this function when simply making a window [[window.setVisible|visible]] or when [[window.reposition|moving / resizing]] it; they call it automatically. Redrawing a window also [[window.restoreCursor|restores its cursor]].
|examples=
{{Example
|desc=Draws a checkerboard pattern in a large window, then bounces a smaller window over the top of it, without needing to manually reconstruct the areas rendered over (Ctrl + T to exit):
|code= local xSize, ySize = term.getSize()
 
 -- Draw a checkerboard pattern in a window that covers the screen:
 local checkerWindow = window.create(term.current(), 1, 1, xSize, ySize)
 for i=1,ySize do
 	checkerWindow.setCursorPos(1,i)
 	for j=1,xSize do
 		checkerWindow.setBackgroundColor(bit.band(i+j,1) == 1 and colours.white or colours.black)
 		checkerWindow.write(" ")
 	end
 end
 
 -- Define a small window at the top left of the display:
 local smallWindow = window.create(term.current(), 1, 1, 5, 1)
 smallWindow.write("BOING")
 
 -- Bounce the small window around the screen:
 local xDir, yDir, xPos, yPos = 1, 1, 1, 1
 
 while true do
 	sleep(0.5)
 	
 	xPos = xPos + xDir
 	yPos = yPos + yDir
 	
 	checkerWindow.redraw()
 	smallWindow.reposition(xPos, yPos)
 	
 	if xPos == 1 then xDir = 1 end
 	if yPos == 1 then yDir = 1 end
 	if xPos == xSize - 4 then xDir = -1 end
 	if yPos == ySize then yDir = -1 end
 end
}}
}}

[[Category:API_Functions]]