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igrid.py
796 lines | 28.2 KiB | text/x-python | PythonLexer
# -*- coding: iso-8859-1 -*-
import ipipe, os, webbrowser, urllib
import wx
import wx.grid, wx.html
try:
sorted
except NameError:
from ipipe import sorted
__all__ = ["igrid"]
class IGridRenderer(wx.grid.PyGridCellRenderer):
"""
This is a custom renderer for our IGridGrid
"""
def __init__(self, table):
self.maxchars = 200
self.table = table
self.colormap = (
( 0, 0, 0),
(174, 0, 0),
( 0, 174, 0),
(174, 174, 0),
( 0, 0, 174),
(174, 0, 174),
( 0, 174, 174),
( 64, 64, 64)
)
wx.grid.PyGridCellRenderer.__init__(self)
def _getvalue(self, row, col):
try:
value = self.table._displayattrs[col].value(self.table.items[row])
(align, width, text) = ipipe.xformat(value, "cell", self.maxchars)
except Exception, exc:
(align, width, text) = ipipe.xformat(exc, "cell", self.maxchars)
return (align, text)
def GetBestSize(self, grid, attr, dc, row, col):
text = grid.GetCellValue(row, col)
(align, text) = self._getvalue(row, col)
dc.SetFont(attr.GetFont())
(w, h) = dc.GetTextExtent(str(text))
return wx.Size(min(w+2, 600), h+2) # add border
def Draw(self, grid, attr, dc, rect, row, col, isSelected):
"""
Takes care of drawing everything in the cell; aligns the text
"""
text = grid.GetCellValue(row, col)
(align, text) = self._getvalue(row, col)
if isSelected:
bg = grid.GetSelectionBackground()
else:
bg = ["white", (240, 240, 240)][row%2]
dc.SetTextBackground(bg)
dc.SetBrush(wx.Brush(bg, wx.SOLID))
dc.SetPen(wx.TRANSPARENT_PEN)
dc.SetFont(attr.GetFont())
dc.DrawRectangleRect(rect)
dc.SetClippingRect(rect)
# Format the text
if align == -1: # left alignment
(width, height) = dc.GetTextExtent(str(text))
x = rect[0]+1
y = rect[1]+0.5*(rect[3]-height)
for (style, part) in text:
if isSelected:
fg = grid.GetSelectionForeground()
else:
fg = self.colormap[style.fg]
dc.SetTextForeground(fg)
(w, h) = dc.GetTextExtent(part)
dc.DrawText(part, x, y)
x += w
elif align == 0: # center alignment
(width, height) = dc.GetTextExtent(str(text))
x = rect[0]+0.5*(rect[2]-width)
y = rect[1]+0.5*(rect[3]-height)
for (style, part) in text:
if isSelected:
fg = grid.GetSelectionForeground()
else:
fg = self.colormap[style.fg]
dc.SetTextForeground(fg)
(w, h) = dc.GetTextExtent(part)
dc.DrawText(part, x, y)
x += w
else: # right alignment
(width, height) = dc.GetTextExtent(str(text))
x = rect[0]+rect[2]-1
y = rect[1]+0.5*(rect[3]-height)
for (style, part) in reversed(text):
(w, h) = dc.GetTextExtent(part)
x -= w
if isSelected:
fg = grid.GetSelectionForeground()
else:
fg = self.colormap[style.fg]
dc.SetTextForeground(fg)
dc.DrawText(part, x, y)
dc.DestroyClippingRegion()
def Clone(self):
return IGridRenderer(self.table)
class IGridTable(wx.grid.PyGridTableBase):
# The data table for the ``IGridGrid``. Some dirty tricks were used here:
# ``GetValue()`` does not get any values (or at least it does not return
# anything, accessing the values is done by the renderer)
# but rather tries to fetch the objects which were requested into the table.
# General behaviour is: Fetch the first X objects. If the user scrolls down
# to the last object another bunch of X objects is fetched (if possible)
def __init__(self, input, fontsize, *attrs):
wx.grid.PyGridTableBase.__init__(self)
self.input = input
self.iterator = ipipe.xiter(input)
self.items = []
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)
def GetAttr(self, *args):
attr = wx.grid.GridCellAttr()
attr.SetFont(wx.Font(self.fontsize, wx.TELETYPE, wx.NORMAL, wx.NORMAL))
return attr
def GetNumberRows(self):
return len(self.items)
def GetNumberCols(self):
return len(self._displayattrs)
def GetColLabelValue(self, col):
if col < len(self._displayattrs):
return self._displayattrs[col].name()
else:
return ""
def GetRowLabelValue(self, row):
return str(row)
def IsEmptyCell(self, row, col):
return False
def _append(self, item):
self.items.append(item)
# Nothing to do if the set of attributes has been fixed by the user
if not self.attrs:
for attr in ipipe.xattrs(item):
attr = ipipe.upgradexattr(attr)
if attr not in self._displayattrset:
self._displayattrs.append(attr)
self._displayattrset.add(attr)
def _fetch(self, count):
# Try to fill ``self.items`` with at least ``count`` objects.
have = len(self.items)
while self.iterator is not None and have < count:
try:
item = self.iterator.next()
except StopIteration:
self.iterator = None
break
except (KeyboardInterrupt, SystemExit):
raise
except Exception, exc:
have += 1
self._append(item)
self.iterator = None
break
else:
have += 1
self._append(item)
def GetValue(self, row, col):
# 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[:]
had_rows = len(self.items)
if row == had_rows - 1 and self.iterator is not None and not self._sizing:
self._fetch(row + 20)
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
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))
self.GetView().ProcessTableMessage(msg)
return ""
def SetValue(self, row, col, value):
pass
class IGridGrid(wx.grid.Grid):
# The actual grid
# all methods for selecting/sorting/picking/... data are implemented here
def __init__(self, panel, input, *attrs):
wx.grid.Grid.__init__(self, panel)
fontsize = 9
self.input = input
self.table = IGridTable(self.input, fontsize, *attrs)
self.SetTable(self.table, True)
self.SetSelectionMode(wx.grid.Grid.wxGridSelectRows)
self.SetDefaultRenderer(IGridRenderer(self.table))
self.EnableEditing(False)
self.Bind(wx.EVT_KEY_DOWN, self.key_pressed)
self.Bind(wx.grid.EVT_GRID_CELL_LEFT_DCLICK, self.cell_doubleclicked)
self.Bind(wx.grid.EVT_GRID_CELL_LEFT_CLICK, self.cell_leftclicked)
self.Bind(wx.grid.EVT_GRID_LABEL_LEFT_DCLICK, self.label_doubleclicked)
self.Bind(wx.grid.EVT_GRID_LABEL_LEFT_CLICK, self.on_label_leftclick)
self.Bind(wx.grid.EVT_GRID_RANGE_SELECT, self._on_selected_range)
self.Bind(wx.grid.EVT_GRID_SELECT_CELL, self._on_selected_cell)
self.current_selection = set()
self.maxchars = 200
def on_label_leftclick(self, event):
event.Skip()
def error_output(self, text):
wx.Bell()
frame = self.GetParent().GetParent().GetParent()
frame.SetStatusText(text)
def _on_selected_range(self, event):
# Internal update to the selection tracking lists
if event.Selecting():
# adding to the list...
self.current_selection.update(xrange(event.GetTopRow(), event.GetBottomRow()+1))
else:
# removal from list
for index in xrange( event.GetTopRow(), event.GetBottomRow()+1):
self.current_selection.discard(index)
event.Skip()
def _on_selected_cell(self, event):
# Internal update to the selection tracking list
self.current_selection = set([event.GetRow()])
event.Skip()
def sort(self, key, reverse=False):
"""
Sort the current list of items using the key function ``key``. If
``reverse`` is true the sort order is reversed.
"""
row = self.GetGridCursorRow()
col = self.GetGridCursorCol()
curitem = self.table.items[row] # Remember where the cursor is now
# Sort items
def realkey(item):
try:
return key(item)
except (KeyboardInterrupt, SystemExit):
raise
except Exception:
return None
try:
self.table.items = ipipe.deque(sorted(self.table.items, key=realkey, reverse=reverse))
except TypeError, exc:
self.error_output("Exception encountered: %s" % exc)
return
# Find out where the object under the cursor went
for (i, item) in enumerate(self.table.items):
if item is curitem:
self.SetGridCursor(i,col)
self.MakeCellVisible(i,col)
self.Refresh()
def sortattrasc(self):
"""
Sort in ascending order; sorting criteria is the current attribute
"""
col = self.GetGridCursorCol()
attr = self.table._displayattrs[col]
frame = self.GetParent().GetParent().GetParent()
if attr is ipipe.noitem:
self.error_output("no column under cursor")
return
frame.SetStatusText("sort by %s (ascending)" % attr.name())
def key(item):
try:
return attr.value(item)
except (KeyboardInterrupt, SystemExit):
raise
except Exception:
return None
self.sort(key)
def sortattrdesc(self):
"""
Sort in descending order; sorting criteria is the current attribute
"""
col = self.GetGridCursorCol()
attr = self.table._displayattrs[col]
frame = self.GetParent().GetParent().GetParent()
if attr is ipipe.noitem:
self.error_output("no column under cursor")
return
frame.SetStatusText("sort by %s (descending)" % attr.name())
def key(item):
try:
return attr.value(item)
except (KeyboardInterrupt, SystemExit):
raise
except Exception:
return None
self.sort(key, reverse=True)
def label_doubleclicked(self, event):
row = event.GetRow()
col = event.GetCol()
if col == -1:
self.enter(row)
def _getvalue(self, row, col):
"""
Gets the text which is displayed at ``(row, col)``
"""
try:
value = self.table._displayattrs[col].value(self.table.items[row])
(align, width, text) = ipipe.xformat(value, "cell", self.maxchars)
except IndexError:
raise IndexError
except Exception, exc:
(align, width, text) = ipipe.xformat(exc, "cell", self.maxchars)
return text
def search(self, searchtext, startrow=0, startcol=0, 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:
while True:
for col in xrange(startcol, self.table.GetNumberCols()):
try:
foo = self.table.GetValue(row, col)
text = self._getvalue(row, col)
if searchtext in text.string().lower():
self.SetGridCursor(row, col)
self.MakeCellVisible(row, col)
return
except IndexError:
return
startcol = 0
row += 1
else:
while True:
for col in xrange(startcol, -1, -1):
try:
foo = self.table.GetValue(row, col)
text = self._getvalue(row, col)
if searchtext in text.string().lower():
self.SetGridCursor(row, col)
self.MakeCellVisible(row, col)
return
except IndexError:
return
startcol = self.table.GetNumberCols()-1
row -= 1
def key_pressed(self, event):
"""
Maps pressed keys to functions
"""
frame = self.GetParent().GetParent().GetParent()
frame.SetStatusText("")
sh = event.ShiftDown()
ctrl = event.ControlDown()
keycode = event.GetKeyCode()
if keycode == ord("P"):
row = self.GetGridCursorRow()
if event.ShiftDown():
col = self.GetGridCursorCol()
self.pickattr(row, col)
else:
self.pick(row)
elif keycode == ord("M"):
if ctrl:
col = self.GetGridCursorCol()
self.pickrowsattr(sorted(self.current_selection), col)
else:
self.pickrows(sorted(self.current_selection))
elif keycode in (wx.WXK_BACK, wx.WXK_DELETE, ord("X")) and not (ctrl or sh):
self.delete_current_notebook()
elif keycode == ord("E") and not (ctrl or sh):
row = self.GetGridCursorRow()
self.enter(row)
elif keycode == ord("E") and sh and not ctrl:
row = self.GetGridCursorRow()
col = self.GetGridCursorCol()
self.enterattr(row, col)
elif keycode == ord("E") and ctrl:
row = self.GetGridCursorRow()
self.SetGridCursor(row, self.GetNumberCols()-1)
elif keycode == wx.WXK_HOME or (keycode == ord("A") and ctrl):
row = self.GetGridCursorRow()
self.SetGridCursor(row, 0)
elif keycode == ord("C") and sh:
col = self.GetGridCursorCol()
attr = self.table._displayattrs[col]
returnobj = []
for i in xrange(self.GetNumberRows()):
returnobj.append(self.table._displayattrs[col].value(self.table.items[i]))
self.quit(returnobj)
elif keycode in (wx.WXK_ESCAPE, ord("Q")) and not (ctrl or sh):
self.quit()
elif keycode == ord("<"):
row = self.GetGridCursorRow()
col = self.GetGridCursorCol()
if not event.ShiftDown():
newcol = col - 1
if newcol >= 0:
self.SetGridCursor(row, col - 1)
else:
newcol = col + 1
if newcol < self.GetNumberCols():
self.SetGridCursor(row, col + 1)
elif keycode == ord("D"):
col = self.GetGridCursorCol()
row = self.GetGridCursorRow()
if not sh:
self.detail(row, col)
else:
self.detail_attr(row, col)
elif keycode == ord("F") and ctrl:
frame.enter_searchtext(event)
elif keycode == wx.WXK_F3:
if sh:
frame.find_previous(event)
else:
frame.find_next(event)
elif keycode == ord("V"):
if sh:
self.sortattrdesc()
else:
self.sortattrasc()
elif keycode == wx.WXK_DOWN:
row = self.GetGridCursorRow()
try:
item = self.table.items[row+1]
except IndexError:
item = self.table.items[row]
self.set_footer(item)
event.Skip()
elif keycode == wx.WXK_UP:
row = self.GetGridCursorRow()
if row >= 1:
item = self.table.items[row-1]
else:
item = self.table.items[row]
self.set_footer(item)
event.Skip()
elif keycode == wx.WXK_RIGHT:
row = self.GetGridCursorRow()
item = self.table.items[row]
self.set_footer(item)
event.Skip()
elif keycode == wx.WXK_LEFT:
row = self.GetGridCursorRow()
item = self.table.items[row]
self.set_footer(item)
event.Skip()
else:
event.Skip()
def delete_current_notebook(self):
"""
deletes the current notebook tab
"""
panel = self.GetParent()
nb = panel.GetParent()
current = nb.GetSelection()
count = nb.GetPageCount()
if count > 1:
for i in xrange(count-1, current-1, -1):
nb.DeletePage(i)
nb.GetCurrentPage().grid.SetFocus()
else:
frame = nb.GetParent()
frame.SetStatusText("This is the last level!")
def _doenter(self, value, *attrs):
"""
"enter" a special item resulting in a new notebook tab
"""
panel = self.GetParent()
nb = panel.GetParent()
frame = nb.GetParent()
current = nb.GetSelection()
count = nb.GetPageCount()
try: # if we want to enter something non-iterable, e.g. a function
if current + 1 == count and value is not self.input: # we have an event in the last tab
frame._add_notebook(value, *attrs)
elif value != self.input: # we have to delete all tabs newer than [panel] first
for i in xrange(count-1, current, -1): # some tabs don't close if we don't close in *reverse* order
nb.DeletePage(i)
frame._add_notebook(value)
except TypeError, exc:
if exc.__class__.__module__ == "exceptions":
msg = "%s: %s" % (exc.__class__.__name__, exc)
else:
msg = "%s.%s: %s" % (exc.__class__.__module__, exc.__class__.__name__, exc)
frame.SetStatusText(msg)
def enterattr(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:
self._doenter(value)
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]]))
def enter(self, row):
try:
value = self.table.items[row]
except Exception, exc:
self.error_output(str(exc))
else:
self._doenter(value)
def detail(self, row, col):
"""
shows a detail-view of the current cell
"""
try:
attr = self.table._displayattrs[col]
item = self.table.items[row]
except Exception, exc:
self.error_output(str(exc))
else:
attrs = [ipipe.AttributeDetail(item, attr) for attr in ipipe.xattrs(item, "detail")]
self._doenter(attrs)
def detail_attr(self, row, col):
try:
attr = self.table._displayattrs[col]
item = attr.value(self.table.items[row])
except Exception, exc:
self.error_output(str(exc))
else:
attrs = [ipipe.AttributeDetail(item, attr) for attr in ipipe.xattrs(item, "detail")]
self._doenter(attrs)
def quit(self, returnobj=None):
"""
quit
"""
frame = self.GetParent().GetParent().GetParent()
if frame.helpdialog:
frame.helpdialog.Destroy()
frame.parent.returnobj = returnobj
frame.Close()
frame.Destroy()
def cell_doubleclicked(self, event):
self.enterattr(event.GetRow(), event.GetCol())
event.Skip()
def cell_leftclicked(self, event):
row = event.GetRow()
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
"""
try:
value = self.table.items[row]
except Exception, exc:
self.error_output(str(exc))
else:
self.quit(value)
def pickrows(self, rows):
"""
pick multiple rows and return to the IPython prompt
"""
try:
value = [self.table.items[row] for row in rows]
except Exception, exc:
self.error_output(str(exc))
else:
self.quit(value)
def pickrowsattr(self, rows, col):
""""
pick one column from multiple rows
"""
values = []
try:
attr = self.table._displayattrs[col]
for row in rows:
try:
values.append(attr.value(self.table.items[row]))
except (SystemExit, KeyboardInterrupt):
raise
except Exception:
raise #pass
except Exception, exc:
self.error_output(str(exc))
else:
self.quit(values)
def pickattr(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:
self.quit(value)
class IGridPanel(wx.Panel):
# Each IGridPanel contains an IGridGrid
def __init__(self, parent, input, *attrs):
wx.Panel.__init__(self, parent, -1)
self.grid = IGridGrid(self, input, *attrs)
sizer = wx.BoxSizer(wx.VERTICAL)
sizer.Add(self.grid, proportion=1, flag=wx.EXPAND | wx.ALL, border=10)
self.SetSizer(sizer)
sizer.Fit(self)
sizer.SetSizeHints(self)
class IGridHTMLHelp(wx.Frame):
def __init__(self, parent, title, filename, size):
wx.Frame.__init__(self, parent, -1, title, size=size)
html = wx.html.HtmlWindow(self)
if "gtk2" in wx.PlatformInfo:
html.SetStandardFonts()
html.LoadFile(filename)
class IGridFrame(wx.Frame):
maxtitlelen = 30
def __init__(self, parent, input):
title = " ".join([str(text) for (style, text) in ipipe.xformat(input, "header", 20)[2]])
wx.Frame.__init__(self, None, title=title, size=(640, 480))
self.menubar = wx.MenuBar()
self.menucounter = 100
self.m_help = wx.Menu()
self.m_search = wx.Menu()
self.m_sort = wx.Menu()
self.notebook = wx.Notebook(self, -1, style=0)
self.statusbar = self.CreateStatusBar(1, wx.ST_SIZEGRIP)
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.menubar.Append(self.m_search, "&Find")
self.menubar.Append(self.m_sort, "&Sort")
self.menubar.Append(self.m_help, "&Help")
self.SetMenuBar(self.menubar)
self.searchtext = ""
self.helpdialog = None
def sortasc(self, event):
grid = self.notebook.GetPage(self.notebook.GetSelection()).grid
grid.sortattrasc()
def sortdesc(self, event):
grid = self.notebook.GetPage(self.notebook.GetSelection()).grid
grid.sortattrdesc()
def find_previous(self, event):
"""
find previous occurrences
"""
if self.searchtext:
grid = self.notebook.GetPage(self.notebook.GetSelection()).grid
row = grid.GetGridCursorRow()
col = grid.GetGridCursorCol()
if col-1 >= 0:
grid.search(self.searchtext, row, col-1, False)
else:
grid.search(self.searchtext, row-1, grid.table.GetNumberCols()-1, False)
else:
self.enter_searchtext(event)
def find_next(self, event):
"""
find the next occurrence
"""
if self.searchtext:
grid = self.notebook.GetPage(self.notebook.GetSelection()).grid
row = grid.GetGridCursorRow()
col = grid.GetGridCursorCol()
if col+1 < grid.table.GetNumberCols():
grid.search(self.searchtext, row, col+1)
else:
grid.search(self.searchtext, row+1, 0)
else:
self.enter_searchtext(event)
def display_help(self, event):
"""
Display a help dialog
"""
if self.helpdialog:
self.helpdialog.Destroy()
filename = os.path.join(os.path.dirname(__file__), "igrid_help.html")
self.helpdialog = IGridHTMLHelp(None, title="Help", filename=filename, size=wx.Size(600,400))
self.helpdialog.Show()
def display_help_in_browser(self, event):
"""
Show the help-HTML in a browser (as a ``HtmlWindow`` does not understand
CSS this looks better)
"""
filename = urllib.pathname2url(os.path.abspath(os.path.join(os.path.dirname(__file__), "igrid_help.html")))
if not filename.startswith("file"):
filename = "file:" + filename
webbrowser.open(filename, new=1, autoraise=True)
def enter_searchexpression(self, event):
pass
def makemenu(self, menu, label, help, cmd):
menu.Append(self.menucounter, label, help)
self.Bind(wx.EVT_MENU, cmd, id=self.menucounter)
self.menucounter += 1
def _add_notebook(self, input, *attrs):
# Adds another notebook which has the starting object ``input``
panel = IGridPanel(self.notebook, input, *attrs)
text = str(ipipe.xformat(input, "header", self.maxtitlelen)[2])
if len(text) >= self.maxtitlelen:
text = text[:self.maxtitlelen].rstrip(".") + "..."
self.notebook.AddPage(panel, text, True)
panel.grid.SetFocus()
self.Layout()
def OnCloseWindow(self, event):
self.Destroy()
def enter_searchtext(self, event):
# Displays a dialog asking for the searchtext
dlg = wx.TextEntryDialog(self, "Find:", "Find in list")
if dlg.ShowModal() == wx.ID_OK:
self.searchtext = dlg.GetValue()
self.notebook.GetPage(self.notebook.GetSelection()).grid.search(self.searchtext, 0, 0)
dlg.Destroy()
class igrid(ipipe.Display):
"""
This is a wx-based display object that can be used instead of ``ibrowse``
(which is curses-based) or ``idump`` (which simply does a print).
"""
def display(self):
self.returnobj = None
app = wx.App()
self.frame = IGridFrame(self, self.input)
self.frame.Show()
app.SetTopWindow(self.frame)
self.frame.Raise()
app.MainLoop()
return self.returnobj