| | 1 | #----------------------------------------------------------------------------- |
| | 2 | # Name: dragscroller.py |
| | 3 | # Purpose: Scrolls a wx.ScrollWindow by dragging |
| | 4 | # |
| | 5 | # Author: Riaan Booysen |
| | 6 | # |
| | 7 | # Created: 2006/09/05 |
| | 8 | # Copyright: (c) 2006 |
| | 9 | # Licence: wxPython |
| | 10 | #----------------------------------------------------------------------------- |
| | 11 | |
| | 12 | import wx |
| | 13 | |
| | 14 | class DragScroller: |
| | 15 | """ Scrolls a wx.ScrollWindow in the direction and speed of a mouse drag. |
| | 16 | |
| | 17 | Call Start with the position of the drag start. |
| | 18 | Call Stop on the drag release. """ |
| | 19 | |
| | 20 | def __init__(self, scrollwin, rate=30, sensitivity=0.75): |
| | 21 | self.scrollwin = scrollwin |
| | 22 | self.rate = rate |
| | 23 | self.sensitivity = sensitivity |
| | 24 | |
| | 25 | self.pos = None |
| | 26 | self.timer = None |
| | 27 | |
| | 28 | def GetScrollWindow(self): |
| | 29 | return self.scrollwin |
| | 30 | def SetScrollWindow(self, scrollwin): |
| | 31 | self.scrollwin = scrollwin |
| | 32 | |
| | 33 | def GetUpdateRate(self): |
| | 34 | return self.rate |
| | 35 | def SetUpdateRate(self, rate): |
| | 36 | self.rate = rate |
| | 37 | |
| | 38 | def GetSensitivity(self): |
| | 39 | return self.sensitivity |
| | 40 | def SetSensitivity(self, sensitivity): |
| | 41 | self.sensitivity = sensitivity |
| | 42 | |
| | 43 | def Start(self, pos): |
| | 44 | """ Start a drag scroll operation """ |
| | 45 | if not self.scrollwin: |
| | 46 | raise Exception, 'No ScrollWindow defined' |
| | 47 | |
| | 48 | self.pos = pos |
| | 49 | self.scrollwin.SetCursor(wx.StockCursor(wx.CURSOR_SIZING)) |
| | 50 | self.scrollwin.CaptureMouse() |
| | 51 | |
| | 52 | self.timer = wx.Timer(self.scrollwin) |
| | 53 | self.scrollwin.Bind(wx.EVT_TIMER, self.OnTimerDoScroll, id=self.timer.GetId()) |
| | 54 | self.timer.Start(self.rate) |
| | 55 | |
| | 56 | def Stop(self): |
| | 57 | """ Stops a drag scroll operation """ |
| | 58 | if self.timer and self.scrollwin: |
| | 59 | self.timer.Stop() |
| | 60 | self.scrollwin.Disconnect(self.timer.GetId()) |
| | 61 | self.timer.Destroy() |
| | 62 | self.timer = None |
| | 63 | |
| | 64 | self.scrollwin.SetCursor(wx.STANDARD_CURSOR) |
| | 65 | self.scrollwin.ReleaseMouse() |
| | 66 | |
| | 67 | def OnTimerDoScroll(self, event): |
| | 68 | if self.pos is None or not self.timer or not self.scrollwin: |
| | 69 | return |
| | 70 | |
| | 71 | new = self.scrollwin.ScreenToClient(wx.GetMousePosition()) |
| | 72 | dx = int((new.x-self.pos.x)*self.sensitivity) |
| | 73 | dy = int((new.y-self.pos.y)*self.sensitivity) |
| | 74 | spx = self.scrollwin.GetScrollPos(wx.HORIZONTAL) |
| | 75 | spy = self.scrollwin.GetScrollPos(wx.VERTICAL) |
| | 76 | |
| | 77 | self.scrollwin.Scroll(spx+dx, spy+dy) |
projects / wxWidgets.git / blame_incremental