Source Code for Module libavg.draggable

 1  #!/usr/bin/python 
 2  # -*- coding: utf-8 -*- 
 3   
 4  avg = None 
 5  g_Player = None 
 6   
 7  try: 
 8      from . import avg 
 9  except ValueError: 
10      pass 
11   
12   
13 -class Draggable: 
14 -    def __init__(self, node, onDragStart=None, onDragEnd=None, onDragMove=None): 
15          global g_Player 
16          g_Player = avg.Player.get() 
17          self.__node = node 
18          self.__onDragStart = onDragStart 
19          self.__onDragEnd = onDragEnd 
20          self.__onDragMove = onDragMove 
21          self.__isDragging = False 
22   
23 -    def enable(self): 
24          self.__node.setEventHandler(avg.CURSORDOWN, avg.MOUSE | avg.TOUCH, self.__onStart) 
25   
26 -    def disable(self): 
27          if self.__isDragging: 
28              self.__stop() 
29          self.__node.setEventHandler(avg.CURSORDOWN, avg.MOUSE | avg.TOUCH, None) 
30          self.__node.setEventHandler(avg.CURSORMOTION, avg.MOUSE | avg.TOUCH, None) 
31          self.__node.setEventHandler(avg.CURSORUP, avg.MOUSE | avg.TOUCH, None) 
32   
33 -    def startDrag(self, event): 
34          self.__onStart(event) 
35   
36 -    def isDragging(self): 
37          return self.__isDragging 
38   
39 -    def __onStart(self, event): 
40          self.__cursorID = event.cursorid 
41          self.__isDragging = True 
42          groupsNode = self.__node.getParent() 
43          groupsNode.reorderChild(groupsNode.indexOf(self.__node),  
44                  groupsNode.getNumChildren()-1) 
45          self.__node.setEventCapture(event.cursorid) 
46          self.__node.setEventHandler(avg.CURSORDOWN, avg.MOUSE | avg.TOUCH, None) 
47          self.__node.setEventHandler(avg.CURSORMOTION, avg.MOUSE | avg.TOUCH, self.__onMove) 
48          self.__node.setEventHandler(avg.CURSORUP, avg.MOUSE | avg.TOUCH, self.__onStop) 
49          if self.__onDragStart: 
50              self.__onDragStart(event) 
51          self.__startDragPos = self.__node.pos 
52   
53 -    def __onMove(self, event): 
54          if event.cursorid == self.__cursorID: 
55              self.__node.x = self.__startDragPos[0]+event.x-event.lastdownpos[0] 
56              self.__node.y = self.__startDragPos[1]+event.y-event.lastdownpos[1] 
57              if self.__onDragMove: 
58                  self.__onDragMove(event) 
59   
60 -    def __onStop(self, event): 
61          if event.cursorid == self.__cursorID: 
62              self.__onMove(event) 
63          self.__stop() 
64          if self.__onDragEnd: 
65              self.__onDragEnd(event) 
66       
67 -    def __stop(self): 
68          self.__isDragging = False 
69          self.__node.setEventHandler(avg.CURSORDOWN, avg.MOUSE | avg.TOUCH, self.__onStart) 
70          self.__node.setEventHandler(avg.CURSORMOTION, avg.MOUSE | avg.TOUCH, None) 
71          self.__node.setEventHandler(avg.CURSORUP, avg.MOUSE | avg.TOUCH, None) 
72          self.__node.releaseEventCapture(self.__cursorID) 
73   
74   
75 -def init(g_avg): 
76      global avg 
77      avg = g_avg 
78