From: Robin Dunn Date: Wed, 6 Sep 2006 04:18:36 +0000 (+0000) Subject: Added wx.lib.dragscroller from Riaan Booysen. X-Git-Url: https://git.saurik.com/wxWidgets.git/commitdiff_plain/f77c79d049bbf925352c83543d47cfa8f542c485 Added wx.lib.dragscroller from Riaan Booysen. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@41027 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775 --- diff --git a/wxPython/demo/DragScroller.py b/wxPython/demo/DragScroller.py new file mode 100644 index 0000000000..5472d14534 --- /dev/null +++ b/wxPython/demo/DragScroller.py @@ -0,0 +1,57 @@ +import wx +import wx.lib.dragscroller + +#------------------------------------------------------------------------------- + +def runTest(frame, nb, log): + win = DragScrollerExample(nb, -1) + return win + +class DragScrollerExample(wx.ScrolledWindow): + def __init__(self, parent, id=-1): + wx.ScrolledWindow.__init__(self, parent, id) + self.Bind(wx.EVT_PAINT, self.OnPaint) + self.Bind(wx.EVT_RIGHT_DOWN, self.OnRightDown) + self.Bind(wx.EVT_RIGHT_UP, self.OnRightUp) + + self.SetScrollbars(1, 1, 2000, 2000, 0, 0) + + self.scroller = wx.lib.dragscroller.DragScroller(self) + + def OnPaint(self, event): + dc = wx.PaintDC(self) + self.DoPrepareDC(dc) + + pen = wx.Pen(wx.BLACK, 5) + dc.SetPen(pen) + + for y in range(10): + for x in range(10): + dc.DrawCircle(x*400+20, y*400+20, 200) + + dc.DrawText('Right click and drag in the direction you want to scroll.', + 20, 20) + dc.DrawText('The distance from the start of the drag determines the speed.', + 20, 50) + + def OnRightDown(self, event): + self.scroller.Start(event.GetPosition()) + + def OnRightUp(self, event): + self.scroller.Stop() + + +#------------------------------------------------------------------------------- + +overview = """ +

DragScroller

+A helper class that adds scrolling to a wx.ScrolledWindow in the direction +of the drag. + +""" + +if __name__ == '__main__': + import sys,os + import run + run.main(['', os.path.basename(sys.argv[0])]) diff --git a/wxPython/demo/Main.py b/wxPython/demo/Main.py index be75f8c97c..3b2855807e 100644 --- a/wxPython/demo/Main.py +++ b/wxPython/demo/Main.py @@ -59,6 +59,7 @@ _treeList = [ 'Toolbook', 'BitmapFromBuffer', 'RawBitmapAccess', + 'DragScroller', ]), # managed windows == things with a (optional) caption you can close @@ -248,6 +249,7 @@ _treeList = [ ('Miscellaneous', [ 'ColourDB', ##'DialogUnits', # needs more explanations + 'DragScroller', 'DrawXXXList', 'FileHistory', 'FontEnumerator', diff --git a/wxPython/docs/CHANGES.txt b/wxPython/docs/CHANGES.txt index 0fbd366d0b..53971a8a84 100644 --- a/wxPython/docs/CHANGES.txt +++ b/wxPython/docs/CHANGES.txt @@ -216,6 +216,10 @@ to the platform specific pixel buffer inside of a wx.Bitmap object. The beginnings of support for RTL languages has been added, thanks to a Google SoC project. +Added wx.lib.dragscroller from Riaan Booysen. It provides a helper +class that can used to scroll a wx.ScrolledWindow in response to a +mouse drag. + diff --git a/wxPython/wx/lib/dragscroller.py b/wxPython/wx/lib/dragscroller.py new file mode 100644 index 0000000000..d4cb20c3fd --- /dev/null +++ b/wxPython/wx/lib/dragscroller.py @@ -0,0 +1,77 @@ +#----------------------------------------------------------------------------- +# Name: dragscroller.py +# Purpose: Scrolls a wx.ScrollWindow by dragging +# +# Author: Riaan Booysen +# +# Created: 2006/09/05 +# Copyright: (c) 2006 +# Licence: wxPython +#----------------------------------------------------------------------------- + +import wx + +class DragScroller: + """ Scrolls a wx.ScrollWindow in the direction and speed of a mouse drag. + + Call Start with the position of the drag start. + Call Stop on the drag release. """ + + def __init__(self, scrollwin, rate=30, sensitivity=0.75): + self.scrollwin = scrollwin + self.rate = rate + self.sensitivity = sensitivity + + self.pos = None + self.timer = None + + def GetScrollWindow(self): + return self.scrollwin + def SetScrollWindow(self, scrollwin): + self.scrollwin = scrollwin + + def GetUpdateRate(self): + return self.rate + def SetUpdateRate(self, rate): + self.rate = rate + + def GetSensitivity(self): + return self.sensitivity + def SetSensitivity(self, sensitivity): + self.sensitivity = sensitivity + + def Start(self, pos): + """ Start a drag scroll operation """ + if not self.scrollwin: + raise Exception, 'No ScrollWindow defined' + + self.pos = pos + self.scrollwin.SetCursor(wx.StockCursor(wx.CURSOR_SIZING)) + self.scrollwin.CaptureMouse() + + self.timer = wx.Timer(self.scrollwin) + self.scrollwin.Bind(wx.EVT_TIMER, self.OnTimerDoScroll, id=self.timer.GetId()) + self.timer.Start(self.rate) + + def Stop(self): + """ Stops a drag scroll operation """ + if self.timer and self.scrollwin: + self.timer.Stop() + self.scrollwin.Disconnect(self.timer.GetId()) + self.timer.Destroy() + self.timer = None + + self.scrollwin.SetCursor(wx.STANDARD_CURSOR) + self.scrollwin.ReleaseMouse() + + def OnTimerDoScroll(self, event): + if self.pos is None or not self.timer or not self.scrollwin: + return + + new = self.scrollwin.ScreenToClient(wx.GetMousePosition()) + dx = int((new.x-self.pos.x)*self.sensitivity) + dy = int((new.y-self.pos.y)*self.sensitivity) + spx = self.scrollwin.GetScrollPos(wx.HORIZONTAL) + spy = self.scrollwin.GetScrollPos(wx.VERTICAL) + + self.scrollwin.Scroll(spx+dx, spy+dy)