| | 1 | #---------------------------------------------------------------------------- |
| | 2 | # Name: scrolledpanel.py |
| | 3 | # Author: Will Sadkin |
| | 4 | # Created: 03/21/2003 |
| | 5 | # Copyright: (c) 2003 by Will Sadkin |
| | 6 | # RCS-ID: $Id$ |
| | 7 | # License: wxWindows license |
| | 8 | #---------------------------------------------------------------------------- |
| | 9 | # 12/11/2003 - Jeff Grimmett (grimmtooth@softhome.net) |
| | 10 | # |
| | 11 | # o 2.5 compatability update. |
| | 12 | # |
| | 13 | # 12/21/2003 - Jeff Grimmett (grimmtooth@softhome.net) |
| | 14 | # |
| | 15 | # o wxScrolledPanel -> ScrolledPanel |
| | 16 | # |
| | 17 | |
| | 18 | import wx |
| | 19 | |
| | 20 | |
| | 21 | class ScrolledPanel( wx.PyScrolledWindow ): |
| | 22 | |
| | 23 | """ ScrolledPanel fills a "hole" in the implementation of |
| | 24 | wx.ScrolledWindow, providing automatic scrollbar and scrolling |
| | 25 | behavior and the tab traversal management that wxScrolledWindow |
| | 26 | lacks. This code was based on the original demo code showing how |
| | 27 | to do this, but is now available for general use as a proper class |
| | 28 | (and the demo is now converted to just use it.) |
| | 29 | |
| | 30 | It is assumed that the ScrolledPanel will have a sizer, as it is |
| | 31 | used to calculate the minimal virtual size of the panel and etc. |
| | 32 | """ |
| | 33 | |
| | 34 | def __init__(self, parent, id=-1, pos = wx.DefaultPosition, |
| | 35 | size = wx.DefaultSize, style = wx.TAB_TRAVERSAL, |
| | 36 | name = "scrolledpanel"): |
| | 37 | |
| | 38 | wx.PyScrolledWindow.__init__(self, parent, id, |
| | 39 | pos=pos, size=size, |
| | 40 | style=style, name=name) |
| | 41 | self.SetInitialSize(size) |
| | 42 | self.Bind(wx.EVT_CHILD_FOCUS, self.OnChildFocus) |
| | 43 | |
| | 44 | |
| | 45 | def SetupScrolling(self, scroll_x=True, scroll_y=True, rate_x=20, rate_y=20): |
| | 46 | """ |
| | 47 | This function sets up the event handling necessary to handle |
| | 48 | scrolling properly. It should be called within the __init__ |
| | 49 | function of any class that is derived from ScrolledPanel, |
| | 50 | once the controls on the panel have been constructed and |
| | 51 | thus the size of the scrolling area can be determined. |
| | 52 | |
| | 53 | """ |
| | 54 | # The following is all that is needed to integrate the sizer and the |
| | 55 | # scrolled window. |
| | 56 | if not scroll_x: rate_x = 0 |
| | 57 | if not scroll_y: rate_y = 0 |
| | 58 | |
| | 59 | # Round up the virtual size to be a multiple of the scroll rate |
| | 60 | sizer = self.GetSizer() |
| | 61 | if sizer: |
| | 62 | w, h = sizer.GetMinSize() |
| | 63 | if rate_x: |
| | 64 | w += rate_x - (w % rate_x) |
| | 65 | if rate_y: |
| | 66 | h += rate_y - (h % rate_y) |
| | 67 | self.SetVirtualSize( (w, h) ) |
| | 68 | self.SetScrollRate(rate_x, rate_y) |
| | 69 | wx.CallAfter(self._SetupAfter) # scroll back to top after initial events |
| | 70 | |
| | 71 | |
| | 72 | def _SetupAfter(self): |
| | 73 | self.SetVirtualSize(self.GetBestVirtualSize()) |
| | 74 | self.Scroll(0,0) |
| | 75 | |
| | 76 | |
| | 77 | def OnChildFocus(self, evt): |
| | 78 | # If the child window that gets the focus is not visible, |
| | 79 | # this handler will try to scroll enough to see it. |
| | 80 | evt.Skip() |
| | 81 | child = evt.GetWindow() |
| | 82 | |
| | 83 | sppu_x, sppu_y = self.GetScrollPixelsPerUnit() |
| | 84 | vs_x, vs_y = self.GetViewStart() |
| | 85 | cr = child.GetRect() |
| | 86 | clntsz = self.GetClientSize() |
| | 87 | new_vs_x, new_vs_y = -1, -1 |
| | 88 | |
| | 89 | # is it before the left edge? |
| | 90 | if cr.x < 0 and sppu_x > 0: |
| | 91 | new_vs_x = vs_x + (cr.x / sppu_x) |
| | 92 | |
| | 93 | # is it above the top? |
| | 94 | if cr.y < 0 and sppu_y > 0: |
| | 95 | new_vs_y = vs_y + (cr.y / sppu_y) |
| | 96 | |
| | 97 | # For the right and bottom edges, scroll enough to show the |
| | 98 | # whole control if possible, but if not just scroll such that |
| | 99 | # the top/left edges are still visible |
| | 100 | |
| | 101 | # is it past the right edge ? |
| | 102 | if cr.right > clntsz.width and sppu_x > 0: |
| | 103 | diff = (cr.right - clntsz.width) / sppu_x |
| | 104 | if cr.x - diff * sppu_x > 0: |
| | 105 | new_vs_x = vs_x + diff + 1 |
| | 106 | else: |
| | 107 | new_vs_x = vs_x + (cr.x / sppu_x) |
| | 108 | |
| | 109 | # is it below the bottom ? |
| | 110 | if cr.bottom > clntsz.height and sppu_y > 0: |
| | 111 | diff = (cr.bottom - clntsz.height) / sppu_y |
| | 112 | if cr.y - diff * sppu_y > 0: |
| | 113 | new_vs_y = vs_y + diff + 1 |
| | 114 | else: |
| | 115 | new_vs_y = vs_y + (cr.y / sppu_y) |
| | 116 | |
| | 117 | # if we need to adjust |
| | 118 | if new_vs_x != -1 or new_vs_y != -1: |
| | 119 | #print "%s: (%s, %s)" % (self.GetName(), new_vs_x, new_vs_y) |
| | 120 | self.Scroll(new_vs_x, new_vs_y) |
projects / wxWidgets.git / blame_incremental