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Added wx.lib.dragscroller from Riaan Booysen.

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@41027 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Robin Dunn
2006-09-06 04:18:36 +00:00
parent 6a9e44d55c
commit f77c79d049
4 changed files with 140 additions and 0 deletions
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57
wxPython/demo/DragScroller.py Normal file
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@@ -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 = """<html><body>
<h2>DragScroller</h2>
<p>
A helper class that adds scrolling to a wx.ScrolledWindow in the direction
of the drag.
</body></html>
"""
if __name__ == '__main__':
import sys,os
import run
run.main(['', os.path.basename(sys.argv[0])])

2
wxPython/demo/Main.py
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@@ -59,6 +59,7 @@ _treeList = [
'Toolbook', 'Toolbook',
'BitmapFromBuffer', 'BitmapFromBuffer',
'RawBitmapAccess', 'RawBitmapAccess',
'DragScroller',
]), ]),
# managed windows == things with a (optional) caption you can close # managed windows == things with a (optional) caption you can close
@@ -248,6 +249,7 @@ _treeList = [
('Miscellaneous', [ ('Miscellaneous', [
'ColourDB', 'ColourDB',
##'DialogUnits', # needs more explanations ##'DialogUnits', # needs more explanations
'DragScroller',
'DrawXXXList', 'DrawXXXList',
'FileHistory', 'FileHistory',
'FontEnumerator', 'FontEnumerator',

4
wxPython/docs/CHANGES.txt
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@@ -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 The beginnings of support for RTL languages has been added, thanks to
a Google SoC project. 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.

77
wxPython/wx/lib/dragscroller.py Normal file
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@@ -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)