Source Code for Module libavg.draggable

  1  #!/usr/bin/env python 
  2  # -*- coding: utf-8 -*- 
  3   
  4  # libavg - Media Playback Engine. 
  5  # Copyright (C) 2003-2008 Ulrich von Zadow 
  6  # 
  7  # This library is free software; you can redistribute it and/or 
  8  # modify it under the terms of the GNU Lesser General Public 
  9  # License as published by the Free Software Foundation; either 
 10  # version 2 of the License, or (at your option) any later version. 
 11  # 
 12  # This library is distributed in the hope that it will be useful, 
 13  # but WITHOUT ANY WARRANTY; without even the implied warranty of 
 14  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU 
 15  # Lesser General Public License for more details. 
 16  # 
 17  # You should have received a copy of the GNU Lesser General Public 
 18  # License along with this library; if not, write to the Free Software 
 19  # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
 20  # 
 21  # Current versions can be found at www.libavg.de 
 22  # 
 23   
 24  avg = None 
 25  g_Player = None 
 26   
 27  try: 
 28      from . import avg 
 29  except ValueError: 
 30      pass 
 31   
 32   
 33 -class Draggable: 
 34 -    def __init__(self, node, onDragStart=None, onDragEnd=None, onDragMove=None): 
 35          global g_Player 
 36          g_Player = avg.Player.get() 
 37          self.__node = node 
 38          self.__onDragStart = onDragStart 
 39          self.__onDragEnd = onDragEnd 
 40          self.__onDragMove = onDragMove 
 41          self.__isDragging = False 
 42   
 43 -    def enable(self): 
 44          self.__node.setEventHandler(avg.CURSORDOWN, avg.MOUSE | avg.TOUCH, self.__onStart) 
 45   
 46 -    def disable(self): 
 47          if self.__isDragging: 
 48              self.__stop() 
 49          self.__node.setEventHandler(avg.CURSORDOWN, avg.MOUSE | avg.TOUCH, None) 
 50          self.__node.setEventHandler(avg.CURSORMOTION, avg.MOUSE | avg.TOUCH, None) 
 51          self.__node.setEventHandler(avg.CURSORUP, avg.MOUSE | avg.TOUCH, None) 
 52   
 53 -    def startDrag(self, event): 
 54          self.__onStart(event) 
 55   
 56 -    def isDragging(self): 
 57          return self.__isDragging 
 58   
 59 -    def __onStart(self, event): 
 60          self.__cursorID = event.cursorid 
 61          self.__isDragging = True 
 62          groupsNode = self.__node.getParent() 
 63          groupsNode.reorderChild(groupsNode.indexOf(self.__node),  
 64                  groupsNode.getNumChildren()-1) 
 65          self.__node.setEventCapture(event.cursorid) 
 66          self.__node.setEventHandler(avg.CURSORDOWN, avg.MOUSE | avg.TOUCH, None) 
 67          self.__node.setEventHandler(avg.CURSORMOTION, avg.MOUSE | avg.TOUCH, self.__onMove) 
 68          self.__node.setEventHandler(avg.CURSORUP, avg.MOUSE | avg.TOUCH, self.__onStop) 
 69          stopBubble = False 
 70          if self.__onDragStart: 
 71              stopBubble = self.__onDragStart(event) 
 72              if stopBubble == None: 
 73                  stopBubble = False 
 74          self.__startDragPos = self.__node.pos 
 75          return stopBubble 
 76   
 77 -    def __onMove(self, event): 
 78          if event.cursorid == self.__cursorID: 
 79              self.__node.x = self.__startDragPos[0]+event.x-event.lastdownpos[0] 
 80              self.__node.y = self.__startDragPos[1]+event.y-event.lastdownpos[1] 
 81              stopBubble = False 
 82              if self.__onDragMove: 
 83                  stopBubble = self.__onDragMove(event) 
 84                  if stopBubble == None: 
 85                      stopBubble = False 
 86              return stopBubble 
 87   
 88 -    def __onStop(self, event): 
 89          if event.cursorid == self.__cursorID: 
 90              self.__onMove(event) 
 91          self.__stop() 
 92          stopBubble = False 
 93          if self.__onDragEnd: 
 94              stopBubble = self.__onDragEnd(event) 
 95              if stopBubble == None: 
 96                  stopBubble = False 
 97          return stopBubble 
 98       
 99 -    def __stop(self): 
100          self.__isDragging = False 
101          self.__node.setEventHandler(avg.CURSORDOWN, avg.MOUSE | avg.TOUCH, self.__onStart) 
102          self.__node.setEventHandler(avg.CURSORMOTION, avg.MOUSE | avg.TOUCH, None) 
103          self.__node.setEventHandler(avg.CURSORUP, avg.MOUSE | avg.TOUCH, None) 
104          self.__node.releaseEventCapture(self.__cursorID) 
105   
106   
107 -def init(g_avg): 
108      global avg 
109      avg = g_avg 
110