+++ /dev/null
-#----------------------------------------------------------------------------
-# Name: scrolledpanel.py
-# Author: Will Sadkin
-# Created: 03/21/2003
-# Copyright: (c) 2003 by Will Sadkin
-# RCS-ID: $Id$
-# License: wxWindows license
-#----------------------------------------------------------------------------
-# 12/11/2003 - Jeff Grimmett (grimmtooth@softhome.net)
-#
-# o 2.5 compatability update.
-#
-# 12/21/2003 - Jeff Grimmett (grimmtooth@softhome.net)
-#
-# o wxScrolledPanel -> ScrolledPanel
-#
-
-import wx
-
-
-class ScrolledPanel( wx.PyScrolledWindow ):
-
- """ ScrolledPanel fills a "hole" in the implementation of
- wx.ScrolledWindow, providing automatic scrollbar and scrolling
- behavior and the tab traversal management that wxScrolledWindow
- lacks. This code was based on the original demo code showing how
- to do this, but is now available for general use as a proper class
- (and the demo is now converted to just use it.)
-
- It is assumed that the ScrolledPanel will have a sizer, as it is
- used to calculate the minimal virtual size of the panel and etc.
- """
-
- def __init__(self, parent, id=-1, pos = wx.DefaultPosition,
- size = wx.DefaultSize, style = wx.TAB_TRAVERSAL,
- name = "scrolledpanel"):
-
- wx.PyScrolledWindow.__init__(self, parent, id,
- pos=pos, size=size,
- style=style, name=name)
- self.SetInitialSize(size)
- self.Bind(wx.EVT_CHILD_FOCUS, self.OnChildFocus)
-
-
- def SetupScrolling(self, scroll_x=True, scroll_y=True, rate_x=20, rate_y=20):
- """
- This function sets up the event handling necessary to handle
- scrolling properly. It should be called within the __init__
- function of any class that is derived from ScrolledPanel,
- once the controls on the panel have been constructed and
- thus the size of the scrolling area can be determined.
-
- """
- # The following is all that is needed to integrate the sizer and the
- # scrolled window.
- if not scroll_x: rate_x = 0
- if not scroll_y: rate_y = 0
-
- # Round up the virtual size to be a multiple of the scroll rate
- sizer = self.GetSizer()
- if sizer:
- w, h = sizer.GetMinSize()
- if rate_x:
- w += rate_x - (w % rate_x)
- if rate_y:
- h += rate_y - (h % rate_y)
- self.SetVirtualSize( (w, h) )
- self.SetScrollRate(rate_x, rate_y)
- wx.CallAfter(self._SetupAfter) # scroll back to top after initial events
-
-
- def _SetupAfter(self):
- self.SetVirtualSize(self.GetBestVirtualSize())
- self.Scroll(0,0)
-
-
- def OnChildFocus(self, evt):
- # If the child window that gets the focus is not visible,
- # this handler will try to scroll enough to see it.
- evt.Skip()
- child = evt.GetWindow()
-
- sppu_x, sppu_y = self.GetScrollPixelsPerUnit()
- vs_x, vs_y = self.GetViewStart()
- cr = child.GetRect()
- clntsz = self.GetClientSize()
- new_vs_x, new_vs_y = -1, -1
-
- # is it before the left edge?
- if cr.x < 0 and sppu_x > 0:
- new_vs_x = vs_x + (cr.x / sppu_x)
-
- # is it above the top?
- if cr.y < 0 and sppu_y > 0:
- new_vs_y = vs_y + (cr.y / sppu_y)
-
- # For the right and bottom edges, scroll enough to show the
- # whole control if possible, but if not just scroll such that
- # the top/left edges are still visible
-
- # is it past the right edge ?
- if cr.right > clntsz.width and sppu_x > 0:
- diff = (cr.right - clntsz.width) / sppu_x
- if cr.x - diff * sppu_x > 0:
- new_vs_x = vs_x + diff + 1
- else:
- new_vs_x = vs_x + (cr.x / sppu_x)
-
- # is it below the bottom ?
- if cr.bottom > clntsz.height and sppu_y > 0:
- diff = (cr.bottom - clntsz.height) / sppu_y
- if cr.y - diff * sppu_y > 0:
- new_vs_y = vs_y + diff + 1
- else:
- new_vs_y = vs_y + (cr.y / sppu_y)
-
- # if we need to adjust
- if new_vs_x != -1 or new_vs_y != -1:
- #print "%s: (%s, %s)" % (self.GetName(), new_vs_x, new_vs_y)
- self.Scroll(new_vs_x, new_vs_y)
projects / wxWidgets.git / blobdiff