Add new commands refresh and refresh_timer (mapped to "R"/"F5"

and to the menu) which restarts the iterator once (refresh)
or after every x seconds (refresh_timer). Add a working
implementation of "searchexpression", where the text entered
is not the text to search for, but an expression that must be
true. Added display of shortcuts to the menu. Added commands
"pickinput" and "pickinputattr" that put the object or attribute
under the cursor in the input line. Split the statusbar to be
able to display the currently active refresh interval.
(Patch by Nik Tautenhahn)

IPython/Extensions/igrid.py

@@ -1,6 +1,7 b''
 # -*- coding: iso-8859-1 -*-
 
 import ipipe, os, webbrowser, urllib
+from IPython import ipapi
 import wx
 import wx.grid, wx.html
 
@@ -36,10 +37,16 b' help = """'
 <p>Pick the attribute under the cursor</p>
 
 <h3>pickallattrs (Shift-C)</h3>
-<p>Pick' the complete column under the cursor (i.e. the attribute under the
+<p>Pick the complete column under the cursor (i.e. the attribute under the
 cursor) from all currently fetched objects. These attributes will be returned
 as a list.</p>
 
+<h3>pickinput (I)</h3>
+<p>Pick the current row as next input line in IPython. Additionally the row is stored as "_"</p>
+
+<h3>pickinputattr (Shift-I)</h3>
+<p>Pick the attribute under the cursor as next input line in IPython. Additionally the row is stored as "_"</p>
+
 <h3>enter (E)</h3>
 <p>Enter the object under the cursor. (what this mean depends on the object
 itself, i.e. how it implements iteration). This opens a new browser 'level'.</p>
@@ -64,11 +71,14 b' attributes than in the list view, depending on the object).</p>'
 <h3>find (CTRL-F)</h3>
 <p>Find text</p>
 
+<h3>find_expression (CTRL-Shift-F)</h3>
+<p>Find entries matching an expression</p>
+
 <h3>find_next (F3)</h3>
-<p>Find next occurrence of the searchtext</p>
+<p>Find next occurrence</p>
 
 <h3>find_previous (Shift-F3)</h3>
-<p>Find previous occurrence of the searchtext </p>
+<p>Find previous occurrence</p>
 
 <h3>sortattrasc (V)</h3>
 <p>Sort the objects (in ascending order) using the attribute under the cursor as the sort key.</p>
@@ -76,6 +86,18 b' attributes than in the list view, depending on the object).</p>'
 <h3>sortattrdesc (Shift-V)</h3>
 <p>Sort the objects (in descending order) using the attribute under the cursor as the sort key.</p>
 
+<h3>refresh_once (R, F5)</h3>
+<p>Refreshes the display by restarting the iterator</p>
+
+<h3>refresh_every_second</h3>
+<p>Refreshes the display by restarting the iterator every second until stopped by stop_refresh.</p>
+
+<h3>refresh_interval</h3>
+<p>Refreshes the display by restarting the iterator every X ms (X is a custom interval set by the user) until stopped by stop_refresh.</p>
+
+<h3>stop_refresh</h3>
+<p>Stops all refresh timers.</p>
+
 <h3>leave (Backspace, DEL, X)</h3>
 <p>Close current tab (and all the tabs to the right of the current one).</h3>
 
@@ -100,6 +122,7 b' attributes than in the list view, depending on the object).</p>'
 
 </body>
 </html>
+
 """
 
 
@@ -216,9 +239,10 b' class IGridTable(wx.grid.PyGridTableBase):'
         self.attrs = [ipipe.upgradexattr(attr) for attr in attrs]
         self._displayattrs = self.attrs[:]
         self._displayattrset = set(self.attrs)
-        self._sizing = False
         self.fontsize = fontsize
         self._fetch(1)
+        self.timer = wx.Timer()
+        self.timer.Bind(wx.EVT_TIMER, self.refresh_content)
 
     def GetAttr(self, *args):
         attr = wx.grid.GridCellAttr()
@@ -277,28 +301,49 b' class IGridTable(wx.grid.PyGridTableBase):'
         # some kind of dummy-function: does not return anything but "";
         # (The value isn't use anyway)
         # its main task is to trigger the fetch of new objects
-        had_cols = self._displayattrs[:]
+        sizing_needed = False
+        had_cols = len(self._displayattrs)
         had_rows = len(self.items)
-        if row == had_rows - 1 and self.iterator is not None and not self._sizing:
+        if row == had_rows - 1 and self.iterator is not None:
             self._fetch(row + 20)
+            sizing_needed = True
         have_rows = len(self.items)
         have_cols = len(self._displayattrs)
         if have_rows > had_rows:
             msg = wx.grid.GridTableMessage(self, wx.grid.GRIDTABLE_NOTIFY_ROWS_APPENDED, have_rows - had_rows)
             self.GetView().ProcessTableMessage(msg)
-            self._sizing = True
-            self.GetView().AutoSizeColumns(False)
-            self._sizing = False
+            sizing_needed = True
         if row >= have_rows:
             return ""
-        if self._displayattrs != had_cols:
-            msg = wx.grid.GridTableMessage(self, wx.grid.GRIDTABLE_NOTIFY_COLS_APPENDED, have_cols - len(had_cols))
+        if have_cols != had_cols:
+            msg = wx.grid.GridTableMessage(self, wx.grid.GRIDTABLE_NOTIFY_COLS_APPENDED, have_cols - had_cols)
             self.GetView().ProcessTableMessage(msg)
+            sizing_needed = True
+        if sizing_needed:
+            self.GetView().AutoSizeColumns(False)
         return ""
 
     def SetValue(self, row, col, value):
         pass
 
+    def refresh_content(self, event):
+        msg = wx.grid.GridTableMessage(self, wx.grid.GRIDTABLE_NOTIFY_ROWS_DELETED, 0, self.GetNumberRows())
+        self.GetView().ProcessTableMessage(msg)
+        self.iterator = ipipe.xiter(self.input)
+        self.items = []
+        self.attrs = [] # _append will calculate new displayattrs
+        self._fetch(1) # fetch one...
+        if self.items:
+            msg = wx.grid.GridTableMessage(self, wx.grid.GRIDTABLE_NOTIFY_ROWS_APPENDED, 1)
+            self.GetView().ProcessTableMessage(msg)
+            self.GetValue(0, 0) # and trigger "fetch next 20"
+            item = self.items[0]
+            self.GetView().AutoSizeColumns(False)
+            panel = self.GetView().GetParent()
+            nb = panel.GetParent()
+            current = nb.GetSelection()
+            if nb.GetPage(current) == panel:
+                self.GetView().set_footer(item)
 
 class IGridGrid(wx.grid.Grid):
     # The actual grid
@@ -328,7 +373,7 b' class IGridGrid(wx.grid.Grid):'
     def error_output(self, text):
         wx.Bell()
         frame = self.GetParent().GetParent().GetParent()
-        frame.SetStatusText(text)
+        frame.SetStatusText(str(text))
 
     def _on_selected_range(self, event):
         # Internal update to the selection tracking lists
@@ -337,7 +382,7 b' class IGridGrid(wx.grid.Grid):'
             self.current_selection.update(xrange(event.GetTopRow(), event.GetBottomRow()+1))
         else:
             # removal from list
-            for index in xrange( event.GetTopRow(), event.GetBottomRow()+1):
+            for index in xrange(event.GetTopRow(), event.GetBottomRow()+1):
                 self.current_selection.discard(index)
         event.Skip()
 
@@ -433,14 +478,77 b' class IGridGrid(wx.grid.Grid):'
             (align, width, text) = ipipe.xformat(exc, "cell", self.maxchars)
         return text
 
-    def search(self, searchtext, startrow=0, startcol=0, search_forward=True):
+    def searchexpression(self, searchexp, startrow=None, search_forward=True ):
+        """
+        Find by expression
+        """
+        frame = self.GetParent().GetParent().GetParent()
+        if searchexp:
+            if search_forward:
+                if not startrow:
+                    row = self.GetGridCursorRow()+1
+                else:
+                    row = startrow + 1
+                while True:
+                    try:
+                        foo = self.table.GetValue(row, 0)
+                        item = self.table.items[row]
+                        try:
+                            globals = ipipe.getglobals(None)
+                            if eval(searchexp, globals, ipipe.AttrNamespace(item)):
+                                self.SetGridCursor(row, 0) # found something
+                                self.MakeCellVisible(row, 0)
+                                break
+                        except (KeyboardInterrupt, SystemExit):
+                            raise
+                        except Exception, exc:
+                            frame.SetStatusText(str(exc))
+                            wx.Bell()
+                            break  # break on error
+                    except IndexError:
+                        return
+                    row += 1
+            else:
+                if not startrow:
+                    row = self.GetGridCursorRow() - 1
+                else:
+                    row = startrow - 1
+                while True:
+                    try:
+                        foo = self.table.GetValue(row, 0)
+                        item = self.table.items[row]
+                        try:
+                            globals = ipipe.getglobals(None)
+                            if eval(searchexp, globals, ipipe.AttrNamespace(item)):
+                                self.SetGridCursor(row, 0) # found something
+                                self.MakeCellVisible(row, 0)
+                                break
+                        except (KeyboardInterrupt, SystemExit):
+                            raise
+                        except Exception, exc:
+                            frame.SetStatusText(str(exc))
+                            wx.Bell()
+                            break  # break on error
+                    except IndexError:
+                        return
+                    row -= 1
+
+
+    def search(self, searchtext, startrow=None, startcol=None, search_forward=True):
         """
         search for ``searchtext``, starting in ``(startrow, startcol)``;
         if ``search_forward`` is true the direction is "forward"
         """
-        row = startrow
         searchtext = searchtext.lower()
         if search_forward:
+            if startrow is not None and startcol is not None:
+                row = startrow
+            else:
+                startcol = self.GetGridCursorCol() + 1
+                row = self.GetGridCursorRow()
+                if startcol >= self.GetNumberCols():
+                    startcol = 0
+                    row += 1
             while True:
                 for col in xrange(startcol, self.table.GetNumberCols()):
                     try:
@@ -455,6 +563,14 b' class IGridGrid(wx.grid.Grid):'
                 startcol = 0
                 row += 1
         else:
+            if startrow is not None and startcol is not None:
+                row = startrow
+            else:
+                startcol = self.GetGridCursorCol() - 1
+                row = self.GetGridCursorRow()
+                if startcol < 0:
+                    startcol = self.GetNumberCols() - 1
+                    row -= 1
             while True:
                 for col in xrange(startcol, -1, -1):
                     try:
@@ -535,7 +651,10 b' class IGridGrid(wx.grid.Grid):'
             else:
                 self.detail_attr(row, col)
         elif keycode == ord("F") and ctrl:
-            frame.enter_searchtext(event)
+            if sh:
+                frame.enter_searchexpression(event)
+            else:
+                frame.enter_searchtext(event)
         elif keycode == wx.WXK_F3:
             if sh:
                 frame.find_previous(event)
@@ -561,7 +680,7 b' class IGridGrid(wx.grid.Grid):'
             else:
                 item = self.table.items[row]
             self.set_footer(item)
-            event.Skip()         
+            event.Skip()
         elif keycode == wx.WXK_RIGHT:
             row = self.GetGridCursorRow()
             item = self.table.items[row]
@@ -572,6 +691,15 b' class IGridGrid(wx.grid.Grid):'
             item = self.table.items[row]
             self.set_footer(item)
             event.Skip()
+        elif keycode == ord("R") or keycode == wx.WXK_F5:
+            self.table.refresh_content(event)
+        elif keycode == ord("I"):
+            row = self.GetGridCursorRow()
+            if not sh:
+                self.pickinput(row)
+            else:
+                col = self.GetGridCursorCol()
+                self.pickinputattr(row, col)
         else:
             event.Skip()
 
@@ -625,7 +753,7 b' class IGridGrid(wx.grid.Grid):'
 
     def set_footer(self, item):
         frame = self.GetParent().GetParent().GetParent()
-        frame.SetStatusText(" ".join([str(text) for (style, text) in ipipe.xformat(item, "footer", 20)[2]]))
+        frame.SetStatusText(" ".join([str(text) for (style, text) in ipipe.xformat(item, "footer", 20)[2]]), 0)
 
     def enter(self, row):
         try:
@@ -680,7 +808,7 b' class IGridGrid(wx.grid.Grid):'
         item = self.table.items[row]
         self.set_footer(item)
         event.Skip()
-        
+
     def pick(self, row):
         """
         pick a single row and return to the IPython prompt
@@ -692,6 +820,27 b' class IGridGrid(wx.grid.Grid):'
         else:
             self.quit(value)
 
+    def pickinput(self, row):
+        try:
+            value = self.table.items[row]
+        except Exception, exc:
+            self.error_output(str(exc))
+        else:
+            api = ipapi.get()
+            api.set_next_input(str(value))
+            self.quit(value)
+
+    def pickinputattr(self, row, col):
+        try:
+            attr = self.table._displayattrs[col]
+            value = attr.value(self.table.items[row])
+        except Exception, exc:
+            self.error_output(str(exc))
+        else:
+            api = ipapi.get()
+            api.set_next_input(str(value))
+            self.quit(value)
+
     def pickrows(self, rows):
         """
         pick multiple rows and return to the IPython prompt
@@ -737,6 +886,7 b' class IGridPanel(wx.Panel):'
     def __init__(self, parent, input, *attrs):
         wx.Panel.__init__(self, parent, -1)
         self.grid = IGridGrid(self, input, *attrs)
+        self.grid.FitInside()
         sizer = wx.BoxSizer(wx.VERTICAL)
         sizer.Add(self.grid, proportion=1, flag=wx.EXPAND | wx.ALL, border=10)
         self.SetSizer(sizer)
@@ -764,25 +914,66 b' class IGridFrame(wx.Frame):'
         self.m_help = wx.Menu()
         self.m_search = wx.Menu()
         self.m_sort = wx.Menu()
+        self.m_refresh = wx.Menu()
         self.notebook = wx.Notebook(self, -1, style=0)
         self.statusbar = self.CreateStatusBar(1, wx.ST_SIZEGRIP)
+        self.statusbar.SetFieldsCount(2)
+        self.SetStatusWidths([-1, 200])
         self.parent = parent
         self._add_notebook(input)
         self.Bind(wx.EVT_CLOSE, self.OnCloseWindow)
-        self.makemenu(self.m_sort, "&Sort (asc)", "Sort ascending", self.sortasc)
-        self.makemenu(self.m_sort, "Sort (&desc)", "Sort descending", self.sortdesc)
-        self.makemenu(self.m_help, "&Help", "Help", self.display_help)
-        self.makemenu(self.m_help, "&Show help in browser", "Show help in browser", self.display_help_in_browser)
-        self.makemenu(self.m_search, "&Find text", "Find text", self.enter_searchtext)
-        self.makemenu(self.m_search, "Find by &expression", "Find by expression", self.enter_searchexpression)
-        self.makemenu(self.m_search, "Find &next", "Find next", self.find_next)
-        self.makemenu(self.m_search, "Find &previous", "Find previous", self.find_previous)
+        self.makemenu(self.m_sort, "&Sort (asc)\tV", "Sort ascending", self.sortasc)
+        self.makemenu(self.m_sort, "Sort (&desc)\tShift-V", "Sort descending", self.sortdesc)
+        self.makemenu(self.m_help, "&Help\tF1", "Help", self.display_help)
+#        self.makemenu(self.m_help, "&Show help in browser", "Show help in browser", self.display_help_in_browser)
+        self.makemenu(self.m_search, "&Find text\tCTRL-F", "Find text", self.enter_searchtext)
+        self.makemenu(self.m_search, "Find by &expression\tCTRL-Shift-F", "Find by expression", self.enter_searchexpression)
+        self.makemenu(self.m_search, "Find &next\tF3", "Find next", self.find_next)
+        self.makemenu(self.m_search, "Find &previous\tShift-F3", "Find previous", self.find_previous)
+        self.makemenu(self.m_refresh, "&Refresh once \tF5", "Refresh once", self.refresh_once)
+        self.makemenu(self.m_refresh, "Refresh every &1s", "Refresh every second", self.refresh_every_second)
+        self.makemenu(self.m_refresh, "Refresh every &X seconds", "Refresh every X seconds", self.refresh_interval)
+        self.makemenu(self.m_refresh, "&Stop all refresh timers", "Stop refresh timers", self.stop_refresh)
         self.menubar.Append(self.m_search, "&Find")
         self.menubar.Append(self.m_sort, "&Sort")
+        self.menubar.Append(self.m_refresh, "&Refresh")
         self.menubar.Append(self.m_help, "&Help")
         self.SetMenuBar(self.menubar)
         self.searchtext = ""
+        self.searchexpression = ""
         self.helpdialog = None
+        self.refresh_interval = 1000
+        self.SetStatusText("Refreshing inactive", 1)
+
+    def refresh_once(self, event):
+        table = self.notebook.GetPage(self.notebook.GetSelection()).grid.table
+        table.refresh_content(event)
+
+    def refresh_interval(self, event):
+        table = self.notebook.GetPage(self.notebook.GetSelection()).grid.table
+        dlg = wx.TextEntryDialog(self, "Enter refresh interval (milliseconds):", "Refresh timer:", defaultValue=str(self.refresh_interval))
+        if dlg.ShowModal() == wx.ID_OK:
+            try:
+                milliseconds = int(dlg.GetValue())
+            except ValueError, exc:
+                self.SetStatusText(str(exc))
+            else:
+                table.timer.Start(milliseconds=milliseconds, oneShot=False)
+                self.SetStatusText("Refresh timer set to %s ms" % milliseconds)
+                self.SetStatusText("Refresh interval: %s ms" % milliseconds, 1)
+                self.refresh_interval = milliseconds
+        dlg.Destroy()
+
+    def stop_refresh(self, event):
+        for i in xrange(self.notebook.GetPageCount()):
+            nb = self.notebook.GetPage(i)
+            nb.grid.table.timer.Stop()
+            self.SetStatusText("Refreshing inactive", 1)
+
+    def refresh_every_second(self, event):
+        table = self.notebook.GetPage(self.notebook.GetSelection()).grid.table
+        table.timer.Start(milliseconds=1000, oneShot=False)
+        self.SetStatusText("Refresh interval: 1000 ms", 1)
 
     def sortasc(self, event):
         grid = self.notebook.GetPage(self.notebook.GetSelection()).grid
@@ -796,31 +987,39 b' class IGridFrame(wx.Frame):'
         """
         find previous occurrences
         """
+        grid = self.notebook.GetPage(self.notebook.GetSelection()).grid
         if self.searchtext:
-            grid = self.notebook.GetPage(self.notebook.GetSelection()).grid
             row = grid.GetGridCursorRow()
             col = grid.GetGridCursorCol()
+            self.SetStatusText('Search mode: text; looking for %s' % self.searchtext)
             if col-1 >= 0:
                 grid.search(self.searchtext, row, col-1, False)
             else:
                 grid.search(self.searchtext, row-1, grid.table.GetNumberCols()-1, False)
+        elif self.searchexpression:
+            self.SetStatusText("Search mode: expression; looking for %s" % repr(self.searchexpression)[2:-1])
+            grid.searchexpression(searchexp=self.searchexpression, search_forward=False)
         else:
-            self.enter_searchtext(event)
+            self.SetStatusText("No search yet: please enter search-text or -expression")
 
     def find_next(self, event):
         """
         find the next occurrence
         """
-        if self.searchtext:
-            grid = self.notebook.GetPage(self.notebook.GetSelection()).grid
+        grid = self.notebook.GetPage(self.notebook.GetSelection()).grid
+        if self.searchtext != "":
             row = grid.GetGridCursorRow()
             col = grid.GetGridCursorCol()
+            self.SetStatusText('Search mode: text; looking for %s' % self.searchtext)
             if col+1 < grid.table.GetNumberCols():
                 grid.search(self.searchtext, row, col+1)
             else:
                 grid.search(self.searchtext, row+1, 0)
+        elif self.searchexpression != "":
+            self.SetStatusText('Search mode: expression; looking for %s' % repr(self.searchexpression)[2:-1])
+            grid.searchexpression(searchexp=self.searchexpression)
         else:
-            self.enter_searchtext(event)
+            self.SetStatusText("No search yet: please enter search-text or -expression")
 
     def display_help(self, event):
         """
@@ -842,7 +1041,13 b' class IGridFrame(wx.Frame):'
         webbrowser.open(filename, new=1, autoraise=True)
 
     def enter_searchexpression(self, event):
-        pass
+        dlg = wx.TextEntryDialog(self, "Find:", "Find matching expression:", defaultValue=self.searchexpression)
+        if dlg.ShowModal() == wx.ID_OK:
+            self.searchexpression = dlg.GetValue()
+            self.searchtext = ""
+            self.SetStatusText('Search mode: expression; looking for %s' % repr(self.searchexpression)[2:-1])
+            self.notebook.GetPage(self.notebook.GetSelection()).grid.searchexpression(self.searchexpression)
+        dlg.Destroy()
 
     def makemenu(self, menu, label, help, cmd):
         menu.Append(self.menucounter, label, help)
@@ -864,10 +1069,12 b' class IGridFrame(wx.Frame):'
 
     def enter_searchtext(self, event):
         # Displays a dialog asking for the searchtext
-        dlg = wx.TextEntryDialog(self, "Find:", "Find in list")
+        dlg = wx.TextEntryDialog(self, "Find:", "Find in list", defaultValue=self.searchtext)
         if dlg.ShowModal() == wx.ID_OK:
             self.searchtext = dlg.GetValue()
-            self.notebook.GetPage(self.notebook.GetSelection()).grid.search(self.searchtext, 0, 0)
+            self.searchexpression = ""
+            self.SetStatusText('Search mode: text; looking for %s' % self.searchtext)
+            self.notebook.GetPage(self.notebook.GetSelection()).grid.search(self.searchtext)
         dlg.Destroy()