#Copyright (c) 2009-11, Walter Bender, Tony Forster # This procedure is invoked when the user-definable block on the # "extras" palette is selected. # Usage: Import this code into a Python (user-definable) block; when # this code is run, the current mouse status will be pushed to the # FILO heap. If a mouse button event occurs, a y, x, and 1 are pushed # to the heap. If no button is pressed, 0 is pushed to the heap. # To use these data, pop the heap in a compare block to determine if a # button has been pushed. If a 1 was popped from the heap, pop the x # and y coordinates. def myblock(tw, x): # ignore second argument ''' Push mouse event to stack ''' if tw.mouse_flag == 1: # push y first so x will be popped first tw.lc.heap.append((tw.canvas.height / 2) - tw.mouse_y) tw.lc.heap.append(tw.mouse_x - (tw.canvas.width / 2)) tw.lc.heap.append(1) # mouse event tw.mouse_flag = 0 else: tw.lc.heap.append(0) # no mouse event