#Copyright (c) 2009-10, Walter Bender, Tony Forster #Permission is hereby granted, free of charge, to any person obtaining a copy #of this software and associated documentation files (the "Software"), to deal #in the Software without restriction, including without limitation the rights #to use, copy, modify, merge, publish, distribute, sublicense, and/or sell #copies of the Software, and to permit persons to whom the Software is #furnished to do so, subject to the following conditions: #The above copyright notice and this permission notice shall be included in #all copies or substantial portions of the Software. #THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR #IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, #FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE #AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER #LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, #OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN #THE SOFTWARE. # # 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, a y, x, 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. The conditional could be use to lower or # raise the pen, for example. After checking the button status, 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((tw.canvas.height / 2) - tw.mouse_y) tw.lc.heap.append(tw.mouse_x - (tw.canvas.width / 2)) tw.lc.heap.append(0) # no mouse event