source: sasview/guiframe/history.py @ 72b524b

ESS_GUIESS_GUI_DocsESS_GUI_batch_fittingESS_GUI_bumps_abstractionESS_GUI_iss1116ESS_GUI_iss879ESS_GUI_iss959ESS_GUI_openclESS_GUI_orderingESS_GUI_sync_sascalccostrafo411magnetic_scattrelease-4.1.1release-4.1.2release-4.2.2release_4.0.1ticket-1009ticket-1094-headlessticket-1242-2d-resolutionticket-1243ticket-1249ticket885unittest-saveload
Last change on this file since 72b524b was ca88b2e, checked in by Gervaise Alina <gervyh@…>, 16 years ago

working on history panel

  • Property mode set to 100644
File size: 6.2 KB
Line 
1"""
2    Panel class to show the model history
3"""
4#TODO: when a model change is followed by a parameter change,
5#      we end up with the same model twice in a row in the history
6#TODO: implement aging of history items
7
8import wx
9import wx.lib.newevent
10import config
11
12# History events
13(HistoryEvent, EVT_HISTORY) = wx.lib.newevent.NewEvent()
14
15# Maximum number of full history events in the buffer
16MAX_BUFF_LEN = 30
17
18isWindows = False
19import sys
20if sys.platform.count("win32")>0:
21    isWindows = True
22   
23if isWindows:
24    from ctypes import *
25    from ctypes.wintypes import DWORD
26
27    SIZE_T = c_ulong
28
29    class _MEMORYSTATUS(Structure):
30        _fields_ = [("dwLength", DWORD),
31                    ("dwMemoryLength", DWORD),
32                    ("dwTotalPhys", SIZE_T),
33                    ("dwAvailPhys", SIZE_T),
34                    ("dwTotalPageFile", SIZE_T),
35                    ("dwAvailPageFile", SIZE_T),
36                    ("dwTotalVirtual", SIZE_T),
37                    ("dwAvailVirtualPhys", SIZE_T)]
38        def show(self):
39            for field_name, field_type in self._fields_:
40                print field_name, getattr(self, field_name)
41   
42
43
44
45class HistoryPanel(wx.Panel):
46    """
47        Panel to show history items
48    """
49    #TODO: show units
50    #TODO: order parameters properly
51    ## Internal name for the AUI manager
52    window_name = "historyPanel"
53    ## Title to appear on top of the window
54    window_caption = "historyPanel"
55   
56    CENTER_PANE = False
57    def __init__(self, parent, *args, **kwargs):
58        wx.Panel.__init__(self, parent, *args, **kwargs)
59        self.parent = parent
60
61        # Listen to history events
62        self.parent.Bind(EVT_HISTORY, self.onEVT_HISTORY)
63
64        # Internal counter of history items
65        self.counter = 0
66       
67        # Buffer filled flag
68        self.buffer_filled = False
69       
70        # Set up the layout
71        self._set_layout()
72       
73        # Save current flag
74        self.current_saved = False
75       
76    def _set_layout(self):
77        """
78            Set up the layout of the panel
79        """
80        self.sizer = wx.GridBagSizer(0,5)
81       
82        title = wx.StaticText(self, -1, "History", style=wx.ALIGN_LEFT)         
83        self.sizer.Add(title, (0,0), flag=wx.LEFT|wx.ALIGN_CENTER_VERTICAL, border=15)
84
85        self.view_box = wx.ListBox(self, 101, wx.DefaultPosition, (295, 200), 
86                                   [], wx.LB_SINGLE | wx.LB_HSCROLL)
87       
88        self.sizer.Add(self.view_box, (1,0), flag=wx.TOP, border=0)
89       
90        self.SetSizer(self.sizer)
91       
92        self.Bind(wx.EVT_CONTEXT_MENU, self.onShowPopup, id=101)
93        self.Bind(wx.EVT_LISTBOX, self.onSelect, id=101)
94       
95    def onRemove(self, ev):
96        """
97            Remove an item
98        """
99        indices = self.view_box.GetSelections()
100        if len(indices)>0:
101            self.view_box.Delete(indices[0])
102       
103    def onRename(self, ev):
104        """
105            Rename an item
106        """
107        indices = self.view_box.GetSelections()
108        if len(indices)>0:
109            print "NOT YET IMPLMENTED"
110            print "renaming", self.view_box.GetString(indices[0])
111       
112    def onShowPopup(self, event):
113        """
114            Popup context menu event
115        """
116        # menu
117        popupmenu = wx.Menu()
118        id = wx.NewId()
119        popupmenu.Append(id, "&Remove Selected")
120        #popupmenu.Append(102, "&Rename Selected")
121        wx.EVT_MENU(self, id, self.onRemove)
122        #wx.EVT_MENU(self, 102, self.onRename)
123
124        pos = event.GetPosition()
125        pos = self.ScreenToClient(pos)
126        self.PopupMenu(popupmenu, pos)
127
128    def onSelect(self, event):
129        """
130            Process item selection events
131        """
132        index = event.GetSelection()
133        view_name = self.view_box.GetString(index)
134        view = event.GetClientData()
135
136        wx.PostEvent(self.parent, view)
137               
138    def onEVT_HISTORY(self, event):
139        """
140            Process EVT_HISTORY events
141            When a history event arrives, put it in the list
142            of history items
143           
144            @param event: EVT_HISTORY event
145        """
146        print "onEVT_HISTORY",event.name
147        #TODO: this will only work on Windows
148        import distutils.util
149        isWindows = False
150        if sys.platform.count("win32")>0:
151            isWindows = True
152           
153        if isWindows:
154            memstatus = _MEMORYSTATUS()
155            windll.kernel32.GlobalMemoryStatus(byref(memstatus))
156            size_0   = getattr(memstatus, 'dwAvailPhys')
157            size_obj = 1000.0
158            if not event.item.state._data_2D == None:
159                size_obj = len(event.item.state._data_2D)*len(event.item.state._data_2D)*32.0
160       
161        #print "HistoryPanel.EVT_HISTORY"
162        self.counter += 1
163        self.view_box.Insert("%d: %s" % (self.counter, event.name), 
164                             self.view_box.GetCount(), event.item)
165               
166        deleteOldItem = False
167        if isWindows:
168            # This break our scheme of the history panel not knowing
169            # about the events, but we need to protect against
170            # filling up the memory.
171            # TODO: fix this
172       
173            if size_0/size_obj < 10:
174                deleteOldItem = True
175               
176        else:
177       
178            # If the buffer is already full, write the earlier ones
179            # in a file.
180            if self.view_box.GetCount() > MAX_BUFF_LEN:
181                deleteOldItem = True
182           
183        if deleteOldItem:
184            #item_0 = self.view_box.GetString(0)
185            #import os
186            # Write it
187            #filename = "history_%i.dat" % os.getpid()
188            #fd = open(filename,'a')
189            #fd.write("test\n")   
190       
191            # For now, delete item from list
192            if not self.buffer_filled:
193                evt = config.StatusBarEvent( \
194                    message = "Memory running low, oldest history events will be deleted")
195                    #message = "Maximum number of history events reached (%g)" % MAX_BUFF_LEN)
196                wx.PostEvent(self.parent, evt)
197                self.buffer_filled = True
198           
199            self.view_box.Delete(0)
200
201
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