matlab - Draw multiple draggable rectangles on image? -

With the following code, I can easily draw a draggable rectangle on the image.

  figure; Imshow ('image.png'); H = true; P = wait (h); Get the% reset status rectangle ('position', p, 'linewidth', 2, 'edge collar', 'r'); % Come here   
   < P> The problem is:  How can I attract more than one dragable rectangle on the image?  And besides,  Number of rectangles is not pre-operated  is not known.  
 PS If it is already possible to attract the number of rectangles it will be easier, for example, if I want to draw 2 rectangles, the following code will work, i.e. only  Wait () :  
  figure; Imshow ('image.png'); H = true; P = wait (h); Get the% reset status rectangle ('position', p, 'linewidth', 2, 'edge collar', 'r'); % Draw here p2 = wait (h); Get the% reset status rectangle ('position', P2, 'linewidth', 2, 'edge collar', 'R'); One way to wrap position acquisitions in the loop on one side is to add a    
 
 
 In this situation, when you will do this type of codebutton which is correcting  handles  when you are done if you are handling it to indicate any type of  uicontrol  Is removed, then  h  is no longer valid, therefore prevents  isvalid  while  loops  the loop.  ~ isempty  is used as the last returned value of  p .  
 Note that this code overwrites every  p  time if you want to record all the positions, not only attract the rectangles, you will need to add it .  , imshow (I) h = absolute UI control ('style', 'pushbutton', 'string', 'don' ', ...' condition ', [20 20 50 20] ... 'callback', 'delete (h)'); While isvalid (h) p = wait (h); If ~ isempty (p) rectangle ('position', p, 'linewidth', 2, 'edge collar', 'r'); End End