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|
#
# FILE: MCListbox.py
#
# DESCRIPTION:
# This file provides a generic Multi-Column Listbox widget. It is derived
# from a heavily hacked version of Pmw.ScrolledFrame
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Free Software Foundation; either version 2 of the License, or (at your
# option) any later version.
#
# THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
# WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
# NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
# ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 675 Mass Ave, Cambridge, MA 02139, USA.
#
import string
import Tkinter
import Pmw
class MultiColumnListbox(Pmw.MegaWidget):
def __init__(self, parent = None, **kw):
colors = Pmw.Color.getdefaultpalette(parent)
# Define the megawidget options.
INITOPT = Pmw.INITOPT
optiondefs = (
#('borderframe', 1, INITOPT),
('horizflex', 'fixed', self._horizflex),
('horizfraction', 0.05, INITOPT),
('hscrollmode', 'dynamic', self._hscrollMode),
('labelmargin', 0, INITOPT),
('labelpos', None, INITOPT),
('scrollmargin', 2, INITOPT),
('usehullsize', 0, INITOPT),
('vertflex', 'fixed', self._vertflex),
('vertfraction', 0.05, INITOPT),
('vscrollmode', 'dynamic', self._vscrollMode),
('labellist', None, INITOPT),
('selectbackground', colors['selectBackground'], INITOPT),
('selectforeground', colors['selectForeground'], INITOPT),
('background', colors['background'], INITOPT),
('foreground', colors['foreground'], INITOPT),
('command', None, None),
('dblclickcommand', None, None),
)
self.defineoptions(kw, optiondefs)
# Initialise the base class (after defining the options).
Pmw.MegaWidget.__init__(self, parent)
self._numcolumns = len(self['labellist'])
self._columnlabels = self['labellist']
self._lineid = 0
self._numrows = 0
self._lineitemframes = []
self._lineitems = []
self._lineitemdata = {}
self._labelframe = {}
self._cursel = []
# Create the components.
self.origInterior = Pmw.MegaWidget.interior(self)
if self['usehullsize']:
self.origInterior.grid_propagate(0)
# Create a frame widget to act as the border of the clipper.
self._borderframe = self.createcomponent('borderframe',
(), None,
Tkinter.Frame,
(self.origInterior,),
relief = 'sunken',
borderwidth = 2,
)
self._borderframe.grid(row = 2, column = 2,
rowspan = 2, sticky = 'news')
# Create the clipping windows.
self._hclipper = self.createcomponent('hclipper',
(), None,
Tkinter.Frame,
(self._borderframe,),
width = 400,
height = 300,
)
self._hclipper.pack(fill = 'both', expand = 1)
self._hsframe = self.createcomponent('hsframe', (), None,
Tkinter.Frame,
(self._hclipper,),
)
self._vclipper = self.createcomponent('vclipper',
(), None,
Tkinter.Frame,
(self._hsframe,),
#width = 400,
#height = 300,
highlightthickness = 0,
borderwidth = 0,
)
self._vclipper.grid(row = 1, column = 0,
columnspan = self._numcolumns,
sticky = 'news')#, expand = 1)
self._hsframe.grid_rowconfigure(1, weight = 1)#, minsize = 300)
gridcolumn = 0
for labeltext in self._columnlabels:
lframe = self.createcomponent(labeltext+'frame', (), None,
Tkinter.Frame,
(self._hsframe,),
borderwidth = 1,
relief = 'raised',
)
label = self.createcomponent(labeltext, (), None,
Tkinter.Label,
(lframe,),
text = labeltext,
)
label.pack(expand = 0, fill = 'y', side = 'left')
lframe.grid(row = 0, column = gridcolumn, sticky = 'ews')
self._labelframe[labeltext] = lframe
#lframe.update()
#print lframe.winfo_reqwidth()
self._hsframe.grid_columnconfigure(gridcolumn, weight = 1)
gridcolumn = gridcolumn + 1
lframe.update()
self._labelheight = lframe.winfo_reqheight()
self.origInterior.grid_rowconfigure(2, minsize = self._labelheight + 2)
self.origInterior.grid_rowconfigure(3, weight = 1, minsize = 0)
self.origInterior.grid_columnconfigure(2, weight = 1, minsize = 0)
# Create the horizontal scrollbar
self._horizScrollbar = self.createcomponent('horizscrollbar',
(), 'Scrollbar',
Tkinter.Scrollbar,
(self.origInterior,),
orient='horizontal',
command=self._xview
)
# Create the vertical scrollbar
self._vertScrollbar = self.createcomponent('vertscrollbar',
(), 'Scrollbar',
Tkinter.Scrollbar,
(self.origInterior,),
#(self._hclipper,),
orient='vertical',
command=self._yview
)
self.createlabel(self.origInterior, childCols = 3, childRows = 4)
# Initialise instance variables.
self._horizScrollbarOn = 0
self._vertScrollbarOn = 0
self.scrollTimer = None
self._scrollRecurse = 0
self._horizScrollbarNeeded = 0
self._vertScrollbarNeeded = 0
self.startX = 0
self.startY = 0
self._flexoptions = ('fixed', 'expand', 'shrink', 'elastic')
# Create a frame in the clipper to contain the widgets to be
# scrolled.
self._vsframe = self.createcomponent('vsframe',
(), None,
Tkinter.Frame,
(self._vclipper,),
#height = 300,
#borderwidth = 4,
#relief = 'groove',
)
# Whenever the clipping window or scrolled frame change size,
# update the scrollbars.
self._hsframe.bind('<Configure>', self._reposition)
self._vsframe.bind('<Configure>', self._reposition)
self._hclipper.bind('<Configure>', self._reposition)
self._vclipper.bind('<Configure>', self._reposition)
#elf._vsframe.bind('<Button-1>', self._vsframeselect)
# Check keywords and initialise options.
self.initialiseoptions()
def destroy(self):
if self.scrollTimer is not None:
self.after_cancel(self.scrollTimer)
self.scrollTimer = None
Pmw.MegaWidget.destroy(self)
# ======================================================================
# Public methods.
def interior(self):
return self._vsframe
# Set timer to call real reposition method, so that it is not
# called multiple times when many things are reconfigured at the
# same time.
def reposition(self):
if self.scrollTimer is None:
self.scrollTimer = self.after_idle(self._scrollBothNow)
def insertrow(self, index, rowdata):
#if len(rowdata) != self._numcolumns:
# raise ValueError, 'Number of items in rowdata does not match number of columns.'
if index > self._numrows:
index = self._numrows
rowframes = {}
for columnlabel in self._columnlabels:
celldata = rowdata.get(columnlabel)
cellframe = self.createcomponent(('cellframeid.%d.%s'%(self._lineid,
columnlabel)),
(), ('Cellframerowid.%d'%self._lineid),
Tkinter.Frame,
(self._vsframe,),
background = self['background'],
#borderwidth = 1,
#relief = 'flat'
)
cellframe.bind('<Double-Button-1>', self._cellframedblclick)
cellframe.bind('<Button-1>', self._cellframeselect)
if celldata:
cell = self.createcomponent(('cellid.%d.%s'%(self._lineid,
columnlabel)),
(), ('Cellrowid.%d'%self._lineid),
Tkinter.Label,
(cellframe,),
background = self['background'],
foreground = self['foreground'],
text = celldata,
)
cell.bind('<Double-Button-1>', self._celldblclick)
cell.bind('<Button-1>', self._cellselect)
cell.pack(expand = 0, fill = 'y', side = 'left', padx = 1, pady = 1)
rowframes[columnlabel] = cellframe
self._lineitemdata[self._lineid] = rowdata
self._lineitems.insert(index, self._lineid)
self._lineitemframes.insert(index, rowframes)
self._numrows = self._numrows + 1
self._lineid = self._lineid + 1
self._placedata(index)
def _placedata(self, index = 0):
gridy = index
for rowframes in self._lineitemframes[index:]:
gridx = 0
for columnlabel in self._columnlabels:
rowframes[columnlabel].grid(row = gridy,
column = gridx,
sticky = 'news')
gridx = gridx + 1
gridy = gridy + 1
def addrow(self, rowdata):
self.insertrow(self._numrows, rowdata)
def delrow(self, index):
rowframes = self._lineitemframes.pop(index)
for columnlabel in self._columnlabels:
rowframes[columnlabel].destroy()
self._placedata(index)
self._numrows = self._numrows - 1
del self._lineitems[index]
if index in self._cursel:
self._cursel.remove(index)
def curselection(self):
# Return a tuple of just one element as this will probably be the
# interface used in a future implementation when multiple rows can
# be selected at once.
return tuple(self._cursel)
def getcurselection(self):
# Return a tuple of just one row as this will probably be the
# interface used in a future implementation when multiple rows can
# be selected at once.
sellist = []
for sel in self._cursel:
sellist.append(self._lineitemdata[self._lineitems[sel]])
return tuple(sellist)
# ======================================================================
# Configuration methods.
def _hscrollMode(self):
# The horizontal scroll mode has been configured.
mode = self['hscrollmode']
if mode == 'static':
if not self._horizScrollbarOn:
self._toggleHorizScrollbar()
elif mode == 'dynamic':
if self._horizScrollbarNeeded != self._horizScrollbarOn:
self._toggleHorizScrollbar()
elif mode == 'none':
if self._horizScrollbarOn:
self._toggleHorizScrollbar()
else:
message = 'bad hscrollmode option "%s": should be static, dynamic, or none' % mode
raise ValueError, message
def _vscrollMode(self):
# The vertical scroll mode has been configured.
mode = self['vscrollmode']
if mode == 'static':
if not self._vertScrollbarOn:
self._toggleVertScrollbar()
elif mode == 'dynamic':
if self._vertScrollbarNeeded != self._vertScrollbarOn:
self._toggleVertScrollbar()
elif mode == 'none':
if self._vertScrollbarOn:
self._toggleVertScrollbar()
else:
message = 'bad vscrollmode option "%s": should be static, dynamic, or none' % mode
raise ValueError, message
def _horizflex(self):
# The horizontal flex mode has been configured.
flex = self['horizflex']
if flex not in self._flexoptions:
message = 'bad horizflex option "%s": should be one of %s' % \
mode, str(self._flexoptions)
raise ValueError, message
self.reposition()
def _vertflex(self):
# The vertical flex mode has been configured.
flex = self['vertflex']
if flex not in self._flexoptions:
message = 'bad vertflex option "%s": should be one of %s' % \
mode, str(self._flexoptions)
raise ValueError, message
self.reposition()
# ======================================================================
# Private methods.
def _reposition(self, event):
gridx = 0
for col in self._columnlabels:
maxwidth = self._labelframe[col].winfo_reqwidth()
for row in self._lineitemframes:
cellwidth = row[col].winfo_reqwidth()
if cellwidth > maxwidth:
maxwidth = cellwidth
self._hsframe.grid_columnconfigure(gridx, minsize = maxwidth)
gridwidth = self._hsframe.grid_bbox(column = gridx, row = 0)[2]
if self['horizflex'] in ('expand', 'elastic') and gridwidth > maxwidth:
maxwidth = gridwidth
self._vsframe.grid_columnconfigure(gridx, minsize = maxwidth)
gridx = gridx + 1
self._vclipper.configure(height = self._hclipper.winfo_height() - self._labelheight)
self.reposition()
# Called when the user clicks in the horizontal scrollbar.
# Calculates new position of frame then calls reposition() to
# update the frame and the scrollbar.
def _xview(self, mode, value, units = None):
if mode == 'moveto':
frameWidth = self._hsframe.winfo_reqwidth()
self.startX = string.atof(value) * float(frameWidth)
else:
clipperWidth = self._hclipper.winfo_width()
if units == 'units':
jump = int(clipperWidth * self['horizfraction'])
else:
jump = clipperWidth
if value == '1':
self.startX = self.startX + jump
else:
self.startX = self.startX - jump
self.reposition()
# Called when the user clicks in the vertical scrollbar.
# Calculates new position of frame then calls reposition() to
# update the frame and the scrollbar.
def _yview(self, mode, value, units = None):
if mode == 'moveto':
frameHeight = self._vsframe.winfo_reqheight()
self.startY = string.atof(value) * float(frameHeight)
else:
clipperHeight = self._vclipper.winfo_height()
if units == 'units':
jump = int(clipperHeight * self['vertfraction'])
else:
jump = clipperHeight
if value == '1':
self.startY = self.startY + jump
else:
self.startY = self.startY - jump
self.reposition()
def _getxview(self):
# Horizontal dimension.
clipperWidth = self._hclipper.winfo_width()
frameWidth = self._hsframe.winfo_reqwidth()
if frameWidth <= clipperWidth:
# The scrolled frame is smaller than the clipping window.
self.startX = 0
endScrollX = 1.0
if self['horizflex'] in ('expand', 'elastic'):
relwidth = 1
else:
relwidth = ''
else:
# The scrolled frame is larger than the clipping window.
if self['horizflex'] in ('shrink', 'elastic'):
self.startX = 0
endScrollX = 1.0
relwidth = 1
else:
if self.startX + clipperWidth > frameWidth:
self.startX = frameWidth - clipperWidth
endScrollX = 1.0
else:
if self.startX < 0:
self.startX = 0
endScrollX = (self.startX + clipperWidth) / float(frameWidth)
relwidth = ''
# Position frame relative to clipper.
self._hsframe.place(x = -self.startX, relwidth = relwidth)
return (self.startX / float(frameWidth), endScrollX)
def _getyview(self):
# Vertical dimension.
clipperHeight = self._vclipper.winfo_height()
frameHeight = self._vsframe.winfo_reqheight()
if frameHeight <= clipperHeight:
# The scrolled frame is smaller than the clipping window.
self.startY = 0
endScrollY = 1.0
if self['vertflex'] in ('expand', 'elastic'):
relheight = 1
else:
relheight = ''
else:
# The scrolled frame is larger than the clipping window.
if self['vertflex'] in ('shrink', 'elastic'):
self.startY = 0
endScrollY = 1.0
relheight = 1
else:
if self.startY + clipperHeight > frameHeight:
self.startY = frameHeight - clipperHeight
endScrollY = 1.0
else:
if self.startY < 0:
self.startY = 0
endScrollY = (self.startY + clipperHeight) / float(frameHeight)
relheight = ''
# Position frame relative to clipper.
self._vsframe.place(y = -self.startY, relheight = relheight)
return (self.startY / float(frameHeight), endScrollY)
# According to the relative geometries of the frame and the
# clipper, reposition the frame within the clipper and reset the
# scrollbars.
def _scrollBothNow(self):
self.scrollTimer = None
# Call update_idletasks to make sure that the containing frame
# has been resized before we attempt to set the scrollbars.
# Otherwise the scrollbars may be mapped/unmapped continuously.
self._scrollRecurse = self._scrollRecurse + 1
self.update_idletasks()
self._scrollRecurse = self._scrollRecurse - 1
if self._scrollRecurse != 0:
return
xview = self._getxview()
yview = self._getyview()
self._horizScrollbar.set(xview[0], xview[1])
self._vertScrollbar.set(yview[0], yview[1])
self._horizScrollbarNeeded = (xview != (0.0, 1.0))
self._vertScrollbarNeeded = (yview != (0.0, 1.0))
# If both horizontal and vertical scrollmodes are dynamic and
# currently only one scrollbar is mapped and both should be
# toggled, then unmap the mapped scrollbar. This prevents a
# continuous mapping and unmapping of the scrollbars.
if (self['hscrollmode'] == self['vscrollmode'] == 'dynamic' and
self._horizScrollbarNeeded != self._horizScrollbarOn and
self._vertScrollbarNeeded != self._vertScrollbarOn and
self._vertScrollbarOn != self._horizScrollbarOn):
if self._horizScrollbarOn:
self._toggleHorizScrollbar()
else:
self._toggleVertScrollbar()
return
if self['hscrollmode'] == 'dynamic':
if self._horizScrollbarNeeded != self._horizScrollbarOn:
self._toggleHorizScrollbar()
if self['vscrollmode'] == 'dynamic':
if self._vertScrollbarNeeded != self._vertScrollbarOn:
self._toggleVertScrollbar()
def _toggleHorizScrollbar(self):
self._horizScrollbarOn = not self._horizScrollbarOn
interior = self.origInterior
if self._horizScrollbarOn:
self._horizScrollbar.grid(row = 5, column = 2, sticky = 'news')
interior.grid_rowconfigure(4, minsize = self['scrollmargin'])
else:
self._horizScrollbar.grid_forget()
interior.grid_rowconfigure(4, minsize = 0)
def _toggleVertScrollbar(self):
self._vertScrollbarOn = not self._vertScrollbarOn
interior = self.origInterior
if self._vertScrollbarOn:
self._vertScrollbar.grid(row = 3, column = 4, sticky = 'news')
interior.grid_columnconfigure(3, minsize = self['scrollmargin'])
else:
self._vertScrollbar.grid_forget()
interior.grid_columnconfigure(3, minsize = 0)
# ======================================================================
# Selection methods.
#def _vsframeselect(self, event):
# print 'vsframe event x: %d y: %d'%(event.x, event.y)
# col, row = self._vsframe.grid_location(event.x, event.y)
# self._select(col, row)
def _cellframeselect(self, event):
#print 'cellframe event x: %d y: %d'%(event.x, event.y)
x = event.widget.winfo_x()
y = event.widget.winfo_y()
#col, row = self._vsframe.grid_location(x + event.x, y + event.y)
self._select(x + event.x, y + event.y)#(col, row)
def _cellselect(self, event):
#print 'cell event x: %d y: %d'%(event.x, event.y)
lx = event.widget.winfo_x()
ly = event.widget.winfo_y()
parent = event.widget.pack_info()['in']
fx = parent.winfo_x()
fy = parent.winfo_y()
#col, row = self._vsframe.grid_location(fx + lx + event.x, fy + ly + event.y)
self._select(fx + lx + event.x, fy + ly + event.y)#(col, row)
def _select(self, x, y):
col, row = self._vsframe.grid_location(x, y)
#print 'Clicked on col: %d row: %d'%(col,row)
cfg = {}
lineid = self._lineitems[row]
cfg['Cellrowid.%d_foreground'%lineid] = self['selectforeground']
cfg['Cellrowid.%d_background'%lineid] = self['selectbackground']
cfg['Cellframerowid.%d_background'%lineid] = self['selectbackground']
#cfg['Cellframerowid%d_relief'%row] = 'raised'
if self._cursel != []:
cursel = self._cursel[0]
lineid = self._lineitems[cursel]
if cursel != None and cursel != row:
cfg['Cellrowid.%d_foreground'%lineid] = self['foreground']
cfg['Cellrowid.%d_background'%lineid] = self['background']
cfg['Cellframerowid.%d_background'%lineid] = self['background']
#cfg['Cellframerowid%d_relief'%cursel] = 'flat'
apply(self.configure, (), cfg)
self._cursel = [row]
cmd = self['command']
if callable(cmd):
cmd()
def _cellframedblclick(self, event):
#print 'double click cell frame'
cmd = self['dblclickcommand']
if callable(cmd):
cmd()
def _celldblclick(self, event):
#print 'double click cell'
cmd = self['dblclickcommand']
if callable(cmd):
cmd()
if __name__ == '__main__':
rootWin = Tkinter.Tk()
Pmw.initialise()
rootWin.title('MultiColumnListbox Demo')
rootWin.configure(width = 500, height = 300)
rootWin.update()
def dbl():
print listbox.getcurselection()
listbox = MultiColumnListbox(rootWin,
#usehullsize = 1,
labellist = ('Column 0',
'Column 1',
'Column 2',
'Column 3',
'Column 4',
#'Column 5',
#'Column 6',
#'Column 7',
#'Column 8',
#'Column 9',
),
horizflex = 'expand',
#vertflex = 'elastic',
dblclickcommand = dbl,
)
#print 'start adding item'
for i in range(20):
r = {}
for j in range(5):
r[('Column %d'%j)] = 'Really long item name %d'%i
listbox.addrow(r)
#print 'items added'
listbox.pack(expand = 1, fill = 'both', padx = 10, pady = 10)
exitButton = Tkinter.Button(rootWin, text="Quit", command=rootWin.quit)
exitButton.pack(side = 'left', padx = 10, pady = 10)
rootWin.mainloop()
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