wxPython/wx/tools/XRCed/undo.py

   1 # Name:         undo.py
   2 # Purpose:      XRC editor, undo/redo module
   3 # Author:       Roman Rolinsky <rolinsky@mema.ucl.ac.be>
   4 # Created:      01.12.2002
   5 # RCS-ID:       $Id$
   6
   7 from globals import *
   8 #from panel import *
   9
  10 # Undo/redo classes
  11 class UndoManager:
  12     # Undo/redo stacks
  13     undo = []
  14     redo = []
  15     def RegisterUndo(self, undoObj):
  16         self.undo.append(undoObj)
  17         for i in self.redo: i.destroy()
  18         self.redo = []
  19     def Undo(self):
  20         undoObj = self.undo.pop()
  21         undoObj.undo()
  22         self.redo.append(undoObj)
  23         g.frame.SetModified()
  24         g.frame.SetStatusText('Undone')
  25     def Redo(self):
  26         undoObj = self.redo.pop()
  27         undoObj.redo()
  28         self.undo.append(undoObj)
  29         g.frame.SetModified()
  30         g.frame.SetStatusText('Redone')
  31     def Clear(self):
  32         for i in self.undo: i.destroy()
  33         self.undo = []
  34         for i in self.redo: i.destroy()
  35         self.redo = []
  36     def CanUndo(self):
  37         return not not self.undo
  38     def CanRedo(self):
  39         return not not self.redo
  40
  41 class UndoCutDelete:
  42     def __init__(self, itemIndex, parent, elem):
  43         self.itemIndex = itemIndex
  44         self.parent = parent
  45         self.elem = elem
  46     def destroy(self):
  47         if self.elem: self.elem.unlink()
  48     def undo(self):
  49         item = g.tree.InsertNode(g.tree.ItemAtFullIndex(self.itemIndex[:-1]),
  50                                  self.parent, self.elem,
  51                                  g.tree.ItemAtFullIndex(self.itemIndex))
  52         # Scroll to show new item (!!! redundant?)
  53         g.tree.EnsureVisible(item)
  54         g.tree.SelectItem(item)
  55         self.elem = None
  56         # Update testWin if needed
  57         if g.testWin and g.tree.IsHighlatable(item):
  58             if g.conf.autoRefresh:
  59                 g.tree.needUpdate = True
  60                 g.tree.pendingHighLight = item
  61             else:
  62                 g.tree.pendingHighLight = None
  63     def redo(self):
  64         item = g.tree.ItemAtFullIndex(self.itemIndex)
  65         # Delete testWin?
  66         if g.testWin:
  67             # If deleting top-level item, delete testWin
  68             if item == g.testWin.item:
  69                 g.testWin.Destroy()
  70                 g.testWin = None
  71             else:
  72                 # Remove highlight, update testWin
  73                 if g.testWin.highLight:
  74                     g.testWin.highLight.Remove()
  75                 g.tree.needUpdate = True
  76         self.elem = g.tree.RemoveLeaf(item)
  77         g.tree.UnselectAll()
  78         g.panel.Clear()
  79
  80 class UndoPasteCreate:
  81     def __init__(self, itemParent, parent, item, selected):
  82         self.itemParentIndex = g.tree.ItemFullIndex(itemParent)
  83         self.parent = parent
  84         self.itemIndex = g.tree.ItemFullIndex(item) # pasted item
  85         self.selectedIndex = g.tree.ItemFullIndex(selected) # maybe different from item
  86         self.elem = None
  87     def destroy(self):
  88         if self.elem: self.elem.unlink()
  89     def undo(self):
  90         self.elem = g.tree.RemoveLeaf(g.tree.ItemAtFullIndex(self.itemIndex))
  91         # Restore old selection
  92         selected = g.tree.ItemAtFullIndex(self.selectedIndex)
  93         g.tree.EnsureVisible(selected)
  94         g.tree.SelectItem(selected)
  95         # Delete testWin?
  96         if g.testWin:
  97             # If deleting top-level item, delete testWin
  98             if selected == g.testWin.item:
  99                 g.testWin.Destroy()
 100                 g.testWin = None
 101             else:
 102                 # Remove highlight, update testWin
 103                 if g.testWin.highLight:
 104                     g.testWin.highLight.Remove()
 105                 g.tree.needUpdate = True
 106     def redo(self):
 107         item = g.tree.InsertNode(g.tree.ItemAtFullIndex(self.itemParentIndex),
 108                                  self.parent, self.elem,
 109                                  g.tree.ItemAtFullIndex(self.itemIndex))
 110         # Scroll to show new item
 111         g.tree.EnsureVisible(item)
 112         g.tree.SelectItem(item)
 113         self.elem = None
 114         # Update testWin if needed
 115         if g.testWin and g.tree.IsHighlatable(item):
 116             if g.conf.autoRefresh:
 117                 g.tree.needUpdate = True
 118                 g.tree.pendingHighLight = item
 119             else:
 120                 g.tree.pendingHighLight = None
 121
 122 class UndoEdit:
 123     def __init__(self):
 124         self.pages = map(ParamPage.GetState, g.panel.pages)
 125         self.selectedIndex = g.tree.ItemFullIndex(g.tree.GetSelection())
 126     def destroy(self):
 127         pass
 128     # Update test view
 129     def update(self, selected):
 130         g.tree.Apply(g.tree.GetPyData(selected), selected)
 131         # Update view
 132         if g.testWin:
 133             if g.testWin.highLight:
 134                 g.testWin.highLight.Remove()
 135             g.tree.pendingHighLight = selected
 136         if g.testWin:
 137             g.tree.needUpdate = True
 138     def undo(self):
 139         # Restore selection
 140         selected = g.tree.ItemAtFullIndex(self.selectedIndex)
 141         if selected != g.tree.GetSelection():
 142             g.tree.SelectItem(selected)
 143         # Save current state for redo
 144         map(ParamPage.SaveState, g.panel.pages)
 145         pages = map(ParamPage.GetState, g.panel.pages)
 146         map(ParamPage.SetState, g.panel.pages, self.pages)
 147         self.pages = pages
 148         self.update(selected)
 149     def redo(self):
 150         self.undo()
 151         self.update(g.tree.GetSelection())