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<FONT COLOR="#DD0000"># Pmw megawidget framework.</FONT>
<FONT COLOR="#DD0000"># This module provides a framework for building megawidgets. It</FONT>
<FONT COLOR="#DD0000"># contains the MegaArchetype class which manages component widgets and</FONT>
<FONT COLOR="#DD0000"># configuration options. Also provided are the MegaToplevel and</FONT>
<FONT COLOR="#DD0000"># MegaWidget classes, derived from the MegaArchetype class. The</FONT>
<FONT COLOR="#DD0000"># MegaToplevel class contains a Tkinter Toplevel widget to act as the</FONT>
<FONT COLOR="#DD0000"># container of the megawidget. This is used as the base class of all</FONT>
<FONT COLOR="#DD0000"># megawidgets that are contained in their own top level window, such</FONT>
<FONT COLOR="#DD0000"># as a Dialog window. The MegaWidget class contains a Tkinter Frame</FONT>
<FONT COLOR="#DD0000"># to act as the container of the megawidget. This is used as the base</FONT>
<FONT COLOR="#DD0000"># class of all other megawidgets, such as a ComboBox or ButtonBox.</FONT>
<FONT COLOR="#DD0000">#</FONT>
<FONT COLOR="#DD0000"># Megawidgets are built by creating a class that inherits from either</FONT>
<FONT COLOR="#DD0000"># the MegaToplevel or MegaWidget class.</FONT>
import string
import sys
import traceback
import types
import Tkinter
from PmwUtils import forwardmethods
<FONT COLOR="#DD0000"># Constant used to indicate that an option can only be set by a call</FONT>
<FONT COLOR="#DD0000"># to the constructor.</FONT>
INITOPT = [42]
_DEFAULT_OPTION_VALUE = [69]
_useTkOptionDb = 0
<FONT COLOR="#DD0000"># Symbolic constants for the indexes into an optionInfo list.</FONT>
_OPT_DEFAULT = 0
_OPT_VALUE = 1
_OPT_FUNCTION = 2
<FONT COLOR="#DD0000">#=============================================================================</FONT>
<STRONG><FONT COLOR="#CC6600">class MegaArchetype</FONT></STRONG>:
<FONT COLOR="#DD0000"># Megawidget abstract root class.</FONT>
<FONT COLOR="#DD0000"># This class provides methods which are inherited by classes</FONT>
<FONT COLOR="#DD0000"># implementing useful bases (this class doesn't provide a</FONT>
<FONT COLOR="#DD0000"># container widget inside which the megawidget can be built).</FONT>
<STRONG> def __init__</STRONG>(self, parent = None, hullClass = None):
<FONT COLOR="#DD0000"># Mapping from each megawidget option to a list of information</FONT>
<FONT COLOR="#DD0000"># about the option</FONT>
<FONT COLOR="#DD0000"># - default value</FONT>
<FONT COLOR="#DD0000"># - current value</FONT>
<FONT COLOR="#DD0000"># - function to call when the option is initialised in the</FONT>
<FONT COLOR="#DD0000"># call to initialiseoptions() in the constructor or</FONT>
<FONT COLOR="#DD0000"># modified via configure(). If this is INITOPT, the</FONT>
<FONT COLOR="#DD0000"># option is an initialisation option (an option that can</FONT>
<FONT COLOR="#DD0000"># be set by the call to the constructor but can not be</FONT>
<FONT COLOR="#DD0000"># used with configure).</FONT>
<FONT COLOR="#DD0000"># This mapping is not initialised here, but in the call to</FONT>
<FONT COLOR="#DD0000"># defineoptions() which precedes construction of this base class.</FONT>
<FONT COLOR="#DD0000">#</FONT>
<FONT COLOR="#DD0000"># self._optionInfo = {}</FONT>
<FONT COLOR="#DD0000"># Mapping from each component name to a tuple of information</FONT>
<FONT COLOR="#DD0000"># about the component.</FONT>
<FONT COLOR="#DD0000"># - component widget instance</FONT>
<FONT COLOR="#DD0000"># - configure function of widget instance</FONT>
<FONT COLOR="#DD0000"># - the class of the widget (Frame, EntryField, etc)</FONT>
<FONT COLOR="#DD0000"># - cget function of widget instance</FONT>
<FONT COLOR="#DD0000"># - the name of the component group of this component, if any</FONT>
self.__componentInfo = {}
<FONT COLOR="#DD0000"># Mapping from alias names to the names of components or</FONT>
<FONT COLOR="#DD0000"># sub-components.</FONT>
self.__componentAliases = {}
<FONT COLOR="#DD0000"># Contains information about the keywords provided to the</FONT>
<FONT COLOR="#DD0000"># constructor. It is a mapping from the keyword to a tuple</FONT>
<FONT COLOR="#DD0000"># containing:</FONT>
<FONT COLOR="#DD0000"># - value of keyword</FONT>
<FONT COLOR="#DD0000"># - a boolean indicating if the keyword has been used.</FONT>
<FONT COLOR="#DD0000"># A keyword is used if, during the construction of a megawidget,</FONT>
<FONT COLOR="#DD0000"># - it is defined in a call to defineoptions(), or</FONT>
<FONT COLOR="#DD0000"># - it references, by name, a component of the megawidget, or</FONT>
<FONT COLOR="#DD0000"># - it references, by group, at least one component</FONT>
<FONT COLOR="#DD0000"># At the end of megawidget construction, a call is made to</FONT>
<FONT COLOR="#DD0000"># initialiseoptions() which reports an error if there are</FONT>
<FONT COLOR="#DD0000"># unused options given to the constructor.</FONT>
<FONT COLOR="#DD0000">#</FONT>
<FONT COLOR="#DD0000"># self._constructorKeywords = {}</FONT>
if hullClass is None:
self._hull = None
else:
if parent is None:
parent = Tkinter._default_root
<FONT COLOR="#DD0000"># Create the hull.</FONT>
self._hull = self.createcomponent(<FONT COLOR="#009900">'hull'</FONT>,
(), None,
hullClass, (parent,))
_hullToMegaWidget[self._hull] = self
if _useTkOptionDb:
<FONT COLOR="#DD0000"># Now that a widget has been created, query the Tk</FONT>
<FONT COLOR="#DD0000"># option database to get the default values for the</FONT>
<FONT COLOR="#DD0000"># options which have not been set in the call to the</FONT>
<FONT COLOR="#DD0000"># constructor. This assumes that defineoptions() is</FONT>
<FONT COLOR="#DD0000"># called before the __init__().</FONT>
option_get = self.option_get
VALUE = _OPT_VALUE
DEFAULT = _OPT_DEFAULT
for name, info in self._optionInfo.items():
value = info[VALUE]
if value is _DEFAULT_OPTION_VALUE:
resourceClass = string.upper(name[0]) + name[1:]
value = option_get(name, resourceClass)
if value != <FONT COLOR="#009900">''</FONT>:
try:
<FONT COLOR="#DD0000"># Convert the string to int/float/tuple, etc</FONT>
value = eval(value, {<FONT COLOR="#009900">'__builtins__'</FONT>: {}})
except:
pass
info[VALUE] = value
else:
info[VALUE] = info[DEFAULT]
<FONT COLOR="#DD0000">#======================================================================</FONT>
<FONT COLOR="#DD0000"># Methods used (mainly) during the construction of the megawidget.</FONT>
<STRONG> def defineoptions</STRONG>(self, keywords, optionDefs):
<FONT COLOR="#DD0000"># Create options, providing the default value and the method</FONT>
<FONT COLOR="#DD0000"># to call when the value is changed. If any option created by</FONT>
<FONT COLOR="#DD0000"># base classes has the same name as one in <optionDefs>, the</FONT>
<FONT COLOR="#DD0000"># base class's value and function will be overriden.</FONT>
<FONT COLOR="#DD0000"># This should be called before the constructor of the base</FONT>
<FONT COLOR="#DD0000"># class, so that default values defined in the derived class</FONT>
<FONT COLOR="#DD0000"># override those in the base class.</FONT>
if not hasattr(self, <FONT COLOR="#009900">'_constructorKeywords'</FONT>):
tmp = {}
for option, value in keywords.items():
tmp[option] = [value, 0]
self._constructorKeywords = tmp
self._optionInfo = {}
<FONT COLOR="#DD0000"># optimisations:</FONT>
optionInfo = self._optionInfo
optionInfo_has_key = optionInfo.has_key
keywords = self._constructorKeywords
keywords_has_key = keywords.has_key
FUNCTION = _OPT_FUNCTION
for name, default, function in optionDefs:
index = string.find(name, <FONT COLOR="#009900">'_'</FONT>)
if index < 0:
<FONT COLOR="#DD0000"># The option will already exist if it has been defined</FONT>
<FONT COLOR="#DD0000"># in a derived class. In this case, do not override the</FONT>
<FONT COLOR="#DD0000"># default value of the option or the callback function</FONT>
<FONT COLOR="#DD0000"># if it is not None.</FONT>
if not optionInfo_has_key(name):
if keywords_has_key(name):
value = keywords[name][0]
optionInfo[name] = [default, value, function]
del keywords[name]
else:
if _useTkOptionDb:
optionInfo[name] = \
[default, _DEFAULT_OPTION_VALUE, function]
else:
optionInfo[name] = [default, default, function]
elif optionInfo[name][FUNCTION] is None:
optionInfo[name][FUNCTION] = function
else:
<FONT COLOR="#DD0000"># This option is of the form "component_option". If this is</FONT>
<FONT COLOR="#DD0000"># not already defined in self._constructorKeywords add it.</FONT>
<FONT COLOR="#DD0000"># This allows a derived class to override the default value</FONT>
<FONT COLOR="#DD0000"># of an option of a component of a base class.</FONT>
if not keywords_has_key(name):
keywords[name] = [default, 0]
<STRONG> def createcomponent</STRONG>(self, name, aliases, group, widgetClass, widgetArgs, **kw):
<FONT COLOR="#DD0000"># Create a component (during construction or later).</FONT>
if hasattr(self, <FONT COLOR="#009900">'_constructorKeywords'</FONT>):
keywords = self._constructorKeywords
else:
keywords = {}
for alias, component in aliases:
<FONT COLOR="#DD0000"># Create aliases to the component and its sub-components.</FONT>
index = string.find(component, <FONT COLOR="#009900">'_'</FONT>)
if index < 0:
self.__componentAliases[alias] = (component, None)
else:
mainComponent = component[:index]
subComponent = component[(index + 1):]
self.__componentAliases[alias] = (mainComponent, subComponent)
<FONT COLOR="#DD0000"># Remove aliases from the constructor keyword arguments by</FONT>
<FONT COLOR="#DD0000"># replacing any keyword arguments that begin with *alias*</FONT>
<FONT COLOR="#DD0000"># with corresponding keys beginning with *component*.</FONT>
alias = alias + <FONT COLOR="#009900">'_'</FONT>
aliasLen = len(alias)
for option in keywords.keys():
if len(option) > aliasLen and option[:aliasLen] == alias:
newkey = component + <FONT COLOR="#009900">'_'</FONT> + option[aliasLen:]
keywords[newkey] = keywords[option]
del keywords[option]
componentName = name + <FONT COLOR="#009900">'_'</FONT>
nameLen = len(componentName)
for option in keywords.keys():
if len(option) > nameLen and option[:nameLen] == componentName:
<FONT COLOR="#DD0000"># The keyword argument refers to this component, so add</FONT>
<FONT COLOR="#DD0000"># this to the options to use when constructing the widget.</FONT>
kw[option[nameLen:]] = keywords[option][0]
del keywords[option]
else:
<FONT COLOR="#DD0000"># Check if this keyword argument refers to the group</FONT>
<FONT COLOR="#DD0000"># of this component. If so, add this to the options</FONT>
<FONT COLOR="#DD0000"># to use when constructing the widget. Mark the</FONT>
<FONT COLOR="#DD0000"># keyword argument as being used, but do not remove it</FONT>
<FONT COLOR="#DD0000"># since it may be required when creating another</FONT>
<FONT COLOR="#DD0000"># component.</FONT>
index = string.find(option, <FONT COLOR="#009900">'_'</FONT>)
if index >= 0 and group == option[:index]:
rest = option[(index + 1):]
kw[rest] = keywords[option][0]
keywords[option][1] = 1
if kw.has_key(<FONT COLOR="#009900">'pyclass'</FONT>):
widgetClass = kw[<FONT COLOR="#009900">'pyclass'</FONT>]
del kw[<FONT COLOR="#009900">'pyclass'</FONT>]
if widgetClass is None:
return None
widget = apply(widgetClass, widgetArgs, kw)
componentClass = widget.__class__.__name__
self.__componentInfo[name] = (widget, widget.configure,
componentClass, widget.cget, group)
return widget
<STRONG> def destroycomponent</STRONG>(self, name):
<FONT COLOR="#DD0000"># Remove a megawidget component.</FONT>
<FONT COLOR="#DD0000"># This command is for use by megawidget designers to destroy a</FONT>
<FONT COLOR="#DD0000"># megawidget component.</FONT>
self.__componentInfo[name][0].destroy()
del self.__componentInfo[name]
<STRONG> def createlabel</STRONG>(self, parent, childCols = 1, childRows = 1):
labelpos = self[<FONT COLOR="#009900">'labelpos'</FONT>]
labelmargin = self[<FONT COLOR="#009900">'labelmargin'</FONT>]
if labelpos is None:
return
label = self.createcomponent(<FONT COLOR="#009900">'label'</FONT>,
(), None,
Tkinter.Label, (parent,))
if labelpos[0] in <FONT COLOR="#009900">'ns'</FONT>:
<FONT COLOR="#DD0000"># vertical layout</FONT>
if labelpos[0] == <FONT COLOR="#009900">'n'</FONT>:
row = 0
margin = 1
else:
row = childRows + 3
margin = row - 1
label.grid(column=2, row=row, columnspan=childCols, sticky=labelpos)
parent.grid_rowconfigure(margin, minsize=labelmargin)
else:
<FONT COLOR="#DD0000"># horizontal layout</FONT>
if labelpos[0] == <FONT COLOR="#009900">'w'</FONT>:
col = 0
margin = 1
else:
col = childCols + 3
margin = col - 1
label.grid(column=col, row=2, rowspan=childRows, sticky=labelpos)
parent.grid_columnconfigure(margin, minsize=labelmargin)
<STRONG> def initialiseoptions</STRONG>(self, myClass):
if self.__class__ is myClass:
unusedOptions = []
keywords = self._constructorKeywords
for name in keywords.keys():
used = keywords[name][1]
if not used:
unusedOptions.append(name)
self._constructorKeywords = {}
if len(unusedOptions) > 0:
if len(unusedOptions) == 1:
text = <FONT COLOR="#009900">'Unknown option "'</FONT>
else:
text = <FONT COLOR="#009900">'Unknown options "'</FONT>
raise TypeError, text + string.join(unusedOptions, <FONT COLOR="#009900">', '</FONT>) + \
<FONT COLOR="#009900">'" for '</FONT> + myClass.__name__
<FONT COLOR="#DD0000"># Call the configuration callback function for every option.</FONT>
FUNCTION = _OPT_FUNCTION
for info in self._optionInfo.values():
func = info[FUNCTION]
if func is not None and func is not INITOPT:
func()
<FONT COLOR="#DD0000">#======================================================================</FONT>
<FONT COLOR="#DD0000"># Method used to configure the megawidget.</FONT>
<STRONG> def configure</STRONG>(self, option=None, **kw):
<FONT COLOR="#DD0000"># Query or configure the megawidget options.</FONT>
<FONT COLOR="#DD0000">#</FONT>
<FONT COLOR="#DD0000"># If not empty, *kw* is a dictionary giving new</FONT>
<FONT COLOR="#DD0000"># values for some of the options of this megawidget or its</FONT>
<FONT COLOR="#DD0000"># components. For options defined for this megawidget, set</FONT>
<FONT COLOR="#DD0000"># the value of the option to the new value and call the</FONT>
<FONT COLOR="#DD0000"># configuration callback function, if any. For options of the</FONT>
<FONT COLOR="#DD0000"># form <component>_<option>, where <component> is a component</FONT>
<FONT COLOR="#DD0000"># of this megawidget, call the configure method of the</FONT>
<FONT COLOR="#DD0000"># component giving it the new value of the option. The</FONT>
<FONT COLOR="#DD0000"># <component> part may be an alias or a component group name.</FONT>
<FONT COLOR="#DD0000">#</FONT>
<FONT COLOR="#DD0000"># If *option* is None, return all megawidget configuration</FONT>
<FONT COLOR="#DD0000"># options and settings. Options are returned as standard 5</FONT>
<FONT COLOR="#DD0000"># element tuples</FONT>
<FONT COLOR="#DD0000">#</FONT>
<FONT COLOR="#DD0000"># If *option* is a string, return the 5 element tuple for the</FONT>
<FONT COLOR="#DD0000"># given configuration option.</FONT>
<FONT COLOR="#DD0000"># First, deal with the option queries.</FONT>
if len(kw) == 0:
<FONT COLOR="#DD0000"># This configure call is querying the values of one or all options.</FONT>
<FONT COLOR="#DD0000"># Return 5-tuples:</FONT>
<FONT COLOR="#DD0000"># (optionName, resourceName, resourceClass, default, value)</FONT>
if option is None:
rtn = {}
for option, config in self._optionInfo.items():
resourceClass = string.upper(option[0]) + option[1:]
rtn[option] = (option, option, resourceClass,
config[_OPT_DEFAULT], config[_OPT_VALUE])
return rtn
else:
config = self._optionInfo[option]
resourceClass = string.upper(option[0]) + option[1:]
return (option, option, resourceClass, config[_OPT_DEFAULT],
config[_OPT_VALUE])
<FONT COLOR="#DD0000"># optimisations:</FONT>
optionInfo = self._optionInfo
optionInfo_has_key = optionInfo.has_key
componentInfo = self.__componentInfo
componentInfo_has_key = componentInfo.has_key
componentAliases = self.__componentAliases
componentAliases_has_key = componentAliases.has_key
VALUE = _OPT_VALUE
FUNCTION = _OPT_FUNCTION
<FONT COLOR="#DD0000"># This will contain a list of options in *kw* which</FONT>
<FONT COLOR="#DD0000"># are known to this megawidget.</FONT>
directOptions = []
<FONT COLOR="#DD0000"># This will contain information about the options in</FONT>
<FONT COLOR="#DD0000"># *kw* of the form <component>_<option>, where</FONT>
<FONT COLOR="#DD0000"># <component> is a component of this megawidget. It is a</FONT>
<FONT COLOR="#DD0000"># dictionary whose keys are the configure method of each</FONT>
<FONT COLOR="#DD0000"># component and whose values are a dictionary of options and</FONT>
<FONT COLOR="#DD0000"># values for the component.</FONT>
indirectOptions = {}
indirectOptions_has_key = indirectOptions.has_key
for option, value in kw.items():
if optionInfo_has_key(option):
<FONT COLOR="#DD0000"># This is one of the options of this megawidget. </FONT>
<FONT COLOR="#DD0000"># Check it is an initialisation option.</FONT>
if optionInfo[option][FUNCTION] is INITOPT:
raise IndexError, \
<FONT COLOR="#009900">'Cannot configure initialisation option "'</FONT> \
+ option + <FONT COLOR="#009900">'" for '</FONT> + self.__class__.__name__
optionInfo[option][VALUE] = value
directOptions.append(option)
else:
index = string.find(option, <FONT COLOR="#009900">'_'</FONT>)
if index >= 0:
<FONT COLOR="#DD0000"># This option may be of the form <component>_<option>.</FONT>
component = option[:index]
componentOption = option[(index + 1):]
<FONT COLOR="#DD0000"># Expand component alias</FONT>
if componentAliases_has_key(component):
component, subComponent = componentAliases[component]
if subComponent is not None:
componentOption = subComponent + <FONT COLOR="#009900">'_'</FONT> \
+ componentOption
<FONT COLOR="#DD0000"># Expand option string to write on error</FONT>
option = component + <FONT COLOR="#009900">'_'</FONT> + componentOption
if componentInfo_has_key(component):
<FONT COLOR="#DD0000"># Configure the named component</FONT>
componentConfigFuncs = [componentInfo[component][1]]
else:
<FONT COLOR="#DD0000"># Check if this is a group name and configure all</FONT>
<FONT COLOR="#DD0000"># components in the group.</FONT>
componentConfigFuncs = []
for info in componentInfo.values():
if info[4] == component:
componentConfigFuncs.append(info[1])
if len(componentConfigFuncs) == 0:
raise IndexError, <FONT COLOR="#009900">'Unknown option "'</FONT> + option + \
<FONT COLOR="#009900">'" for '</FONT> + self.__class__.__name__
<FONT COLOR="#DD0000"># Add the configure method(s) (may be more than</FONT>
<FONT COLOR="#DD0000"># one if this is configuring a component group)</FONT>
<FONT COLOR="#DD0000"># and option/value to dictionary.</FONT>
for componentConfigFunc in componentConfigFuncs:
if not indirectOptions_has_key(componentConfigFunc):
indirectOptions[componentConfigFunc] = {}
indirectOptions[componentConfigFunc][componentOption] \
= value
else:
raise IndexError, <FONT COLOR="#009900">'Unknown option "'</FONT> + option + \
<FONT COLOR="#009900">'" for '</FONT> + self.__class__.__name__
<FONT COLOR="#DD0000"># Call the configure methods for any components.</FONT>
map(apply, indirectOptions.keys(),
((),) * len(indirectOptions), indirectOptions.values())
<FONT COLOR="#DD0000"># Call the configuration callback function for each option.</FONT>
for option in directOptions:
info = optionInfo[option]
func = info[_OPT_FUNCTION]
if func is not None:
func()
<FONT COLOR="#DD0000">#======================================================================</FONT>
<FONT COLOR="#DD0000"># Methods used to query the megawidget.</FONT>
<STRONG> def component</STRONG>(self, name):
<FONT COLOR="#DD0000"># Return a component widget of the megawidget given the</FONT>
<FONT COLOR="#DD0000"># component's name</FONT>
<FONT COLOR="#DD0000"># This allows the user of a megawidget to access and configure</FONT>
<FONT COLOR="#DD0000"># widget components directly.</FONT>
<FONT COLOR="#DD0000"># Find the main component and any subcomponents</FONT>
index = string.find(name, <FONT COLOR="#009900">'_'</FONT>)
if index < 0:
component = name
remainingComponents = None
else:
component = name[:index]
remainingComponents = name[(index + 1):]
<FONT COLOR="#DD0000"># Expand component alias</FONT>
if self.__componentAliases.has_key(component):
component, subComponent = self.__componentAliases[component]
if subComponent is not None:
if remainingComponents is None:
remainingComponents = subComponent
else:
remainingComponents = subComponent + <FONT COLOR="#009900">'_'</FONT> \
+ remainingComponents
widget = self.__componentInfo[component][0]
if remainingComponents is None:
return widget
else:
return widget.component(remainingComponents)
<STRONG> def interior</STRONG>(self):
<FONT COLOR="#DD0000"># Return the widget framing the remaining interior space.</FONT>
<FONT COLOR="#DD0000"># By default it returns the hull.</FONT>
<FONT COLOR="#DD0000"># Return the widget framing the interior space of the</FONT>
<FONT COLOR="#DD0000"># megawidget. For the MegaWidget and MegaToplevel classes,</FONT>
# this is the same as the <FONT COLOR="#009900">'hull'</FONT> component. When a subclass
<FONT COLOR="#DD0000"># is creating components they should usually use interior() as</FONT>
<FONT COLOR="#DD0000"># the widget in which components should be contained. </FONT>
<FONT COLOR="#DD0000"># Megawidgets (such as a toplevel window with a menu bar and</FONT>
<FONT COLOR="#DD0000"># status bar) which can be further subclassed should redefine</FONT>
<FONT COLOR="#DD0000"># interior() to return the widget in which subclasses should</FONT>
<FONT COLOR="#DD0000"># create their components. The overall containing widget is</FONT>
# always available as <FONT COLOR="#009900">'hull'</FONT> (and should not be redefined).
<FONT COLOR="#DD0000"># This method is for use by MegaWidget or MegaToplevel</FONT>
<FONT COLOR="#DD0000"># subclasses. Other classes should still access all</FONT>
<FONT COLOR="#DD0000"># megawidget components by name e.g. a widget redefining</FONT>
<FONT COLOR="#DD0000"># interior() should create it as a component of the</FONT>
<FONT COLOR="#DD0000"># megawidget.</FONT>
return self._hull
<STRONG> def __str__</STRONG>(self):
return str(self._hull)
<STRONG> def cget</STRONG>(self, option):
<FONT COLOR="#DD0000"># Get current configuration setting.</FONT>
# Return the value of an option, for example myWidget[<FONT COLOR="#009900">'font'</FONT>].
if self._optionInfo.has_key(option):
return self._optionInfo[option][_OPT_VALUE]
else:
index = string.find(option, <FONT COLOR="#009900">'_'</FONT>)
if index >= 0:
component = option[:index]
componentOption = option[(index + 1):]
<FONT COLOR="#DD0000"># Expand component alias</FONT>
if self.__componentAliases.has_key(component):
component, subComponent = self.__componentAliases[component]
if subComponent is not None:
componentOption = subComponent + <FONT COLOR="#009900">'_'</FONT> + componentOption
<FONT COLOR="#DD0000"># Expand option string to write on error</FONT>
option = component + <FONT COLOR="#009900">'_'</FONT> + componentOption
if self.__componentInfo.has_key(component):
<FONT COLOR="#DD0000"># Call cget on the component.</FONT>
componentCget = self.__componentInfo[component][3]
return componentCget(componentOption)
else:
<FONT COLOR="#DD0000"># If this is a group name, call cget for one of</FONT>
<FONT COLOR="#DD0000"># the components in the group.</FONT>
for info in self.__componentInfo.values():
if info[4] == component:
componentCget = info[3]
return componentCget(componentOption)
raise IndexError, <FONT COLOR="#009900">'Unknown option "'</FONT> + option + \
<FONT COLOR="#009900">'" for '</FONT> + self.__class__.__name__
__getitem__ = cget
<STRONG> def isinitoption</STRONG>(self, option):
return self._optionInfo[option][_OPT_FUNCTION] is INITOPT
<STRONG> def options</STRONG>(self):
options = []
if hasattr(self, <FONT COLOR="#009900">'_optionInfo'</FONT>):
for option, info in self._optionInfo.items():
isinit = info[_OPT_FUNCTION] is INITOPT
default = info[_OPT_DEFAULT]
options.append((option, default, isinit))
options.sort()
return options
<STRONG> def components</STRONG>(self):
<FONT COLOR="#DD0000"># Return a list of all components.</FONT>
# This list includes the <FONT COLOR="#009900">'hull'</FONT> component and all widget subcomponents
names = self.__componentInfo.keys()
names.sort()
return names
<STRONG> def componentaliases</STRONG>(self):
<FONT COLOR="#DD0000"># Return a list of all component aliases.</FONT>
componentAliases = self.__componentAliases
names = componentAliases.keys()
names.sort()
rtn = []
for alias in names:
(mainComponent, subComponent) = componentAliases[alias]
if subComponent is None:
rtn.append((alias, mainComponent))
else:
rtn.append((alias, mainComponent + <FONT COLOR="#009900">'_'</FONT> + subComponent))
return rtn
<STRONG> def componentgroup</STRONG>(self, name):
return self.__componentInfo[name][4]
<FONT COLOR="#DD0000">#=============================================================================</FONT>
<STRONG><FONT COLOR="#CC6600">class MegaToplevel</FONT></STRONG>(MegaArchetype):
<FONT COLOR="#DD0000"># Toplevel megawidget base class.</FONT>
<FONT COLOR="#DD0000">#</FONT>
<FONT COLOR="#DD0000"># The MegaToplevel class inherits everything from the</FONT>
<FONT COLOR="#DD0000"># MegaArchetype class, and adds a Tkinter Toplevel called the</FONT>
# <FONT COLOR="#009900">'hull'</FONT> component to represent the body of the megawidget. The
<FONT COLOR="#DD0000"># window class name for the hull is set to the most-specific class</FONT>
<FONT COLOR="#DD0000"># name for the megawidget. The class acts as the base class of</FONT>
<FONT COLOR="#DD0000"># megawidgets that are contained in their own toplevel window. </FONT>
<FONT COLOR="#DD0000"># Derived classes specialise this widget by creating other widget</FONT>
<FONT COLOR="#DD0000"># components as children of the hull.</FONT>
<FONT COLOR="#DD0000">#</FONT>
<FONT COLOR="#DD0000"># The MegaToplevel class forwards all Tkinter Toplevel methods on</FONT>
<FONT COLOR="#DD0000"># to the hull component. For example, methods such as show and</FONT>
<FONT COLOR="#DD0000"># activate and all the wm methods can be used with a MegaToplevel</FONT>
<FONT COLOR="#DD0000"># megawidget.</FONT>
<FONT COLOR="#DD0000">#</FONT>
<FONT COLOR="#DD0000"># Components</FONT>
<FONT COLOR="#DD0000"># hull exterior of the megawidget (a Tkinter Toplevel)</FONT>
<FONT COLOR="#DD0000">#</FONT>
<FONT COLOR="#DD0000"># Options</FONT>
<FONT COLOR="#DD0000"># activatecommand called whenever the toplevel is activated</FONT>
<FONT COLOR="#DD0000"># title window manager title of the toplevel window</FONT>
<FONT COLOR="#DD0000">#</FONT>
<FONT COLOR="#DD0000"># Use show/withdraw for normal use and activate/deactivate for</FONT>
<FONT COLOR="#DD0000"># modal dialog use. If the window is deleted by the window</FONT>
<FONT COLOR="#DD0000"># manager while being shown normally, the default behaviour is to</FONT>
<FONT COLOR="#DD0000"># destroy the window. If the window is deleted by the window</FONT>
<FONT COLOR="#DD0000"># manager while the window is active (ie: when used as a modal</FONT>
<FONT COLOR="#DD0000"># dialog), the window is deactivated. Use the userdeletefunc()</FONT>
<FONT COLOR="#DD0000"># and usermodaldeletefunc() methods to override these behaviours. </FONT>
# Do not call protocol(<FONT COLOR="#009900">'WM_DELETE_WINDOW'</FONT>, func) directly if you
<FONT COLOR="#DD0000"># want to use this toplevel as a modal dialog.</FONT>
<FONT COLOR="#DD0000"># The currently active windows form a stack with the most recently</FONT>
<FONT COLOR="#DD0000"># activated window at the top of the stack. All mouse and</FONT>
<FONT COLOR="#DD0000"># keyboard events are sent to this top window. When it</FONT>
<FONT COLOR="#DD0000"># deactivates, the next window in the stack starts to receive</FONT>
<FONT COLOR="#DD0000"># events. <_grabStack> is a list of tuples. Each tuple contains</FONT>
<FONT COLOR="#DD0000"># the active widget and a boolean indicating whether the window</FONT>
<FONT COLOR="#DD0000"># was activated in global mode.</FONT>
_grabStack = []
<STRONG> def __init__</STRONG>(self, parent = None, **kw):
<FONT COLOR="#DD0000"># Define the options for this megawidget.</FONT>
optiondefs = (
(<FONT COLOR="#009900">'activatecommand'</FONT>, None, None),
(<FONT COLOR="#009900">'title'</FONT>, None, self._settitle),
(<FONT COLOR="#009900">'hull_class'</FONT>, self.__class__.__name__, None),
)
self.defineoptions(kw, optiondefs)
<FONT COLOR="#DD0000"># Initialise the base class (after defining the options).</FONT>
MegaArchetype.__init__(self, parent, Tkinter.Toplevel)
<FONT COLOR="#DD0000"># Initialise instance.</FONT>
self.protocol(<FONT COLOR="#009900">'WM_DELETE_WINDOW'</FONT>, self._userDeleteWindow)
<FONT COLOR="#DD0000"># Initialise instance variables.</FONT>
self._firstShowing = 1
<FONT COLOR="#DD0000"># Used by show() to ensure window retains previous position on screen.</FONT>
<FONT COLOR="#DD0000"># The IntVar() variable to wait on during a modal dialog.</FONT>
self._wait = None
# Attribute _active can be <FONT COLOR="#009900">'no'</FONT>, <FONT COLOR="#009900">'yes'</FONT>, or <FONT COLOR="#009900">'waiting'</FONT>. The
<FONT COLOR="#DD0000"># latter means that the window has been deiconified but has</FONT>
<FONT COLOR="#DD0000"># not yet become visible.</FONT>
self._active = <FONT COLOR="#009900">'no'</FONT>
self._userDeleteFunc = self.destroy
self._userModalDeleteFunc = self.deactivate
<FONT COLOR="#DD0000"># Check keywords and initialise options.</FONT>
self.initialiseoptions(MegaToplevel)
<STRONG> def _settitle</STRONG>(self):
title = self[<FONT COLOR="#009900">'title'</FONT>]
if title is not None:
self.title(title)
<STRONG> def userdeletefunc</STRONG>(self, func=None):
if func:
self._userDeleteFunc = func
else:
return self._userDeleteFunc
<STRONG> def usermodaldeletefunc</STRONG>(self, func=None):
if func:
self._userModalDeleteFunc = func
else:
return self._userModalDeleteFunc
<STRONG> def _userDeleteWindow</STRONG>(self):
if self.active():
self._userModalDeleteFunc()
else:
self._userDeleteFunc()
<STRONG> def destroy</STRONG>(self):
<FONT COLOR="#DD0000"># Allow this to be called more than once.</FONT>
if _hullToMegaWidget.has_key(self._hull):
del _hullToMegaWidget[self._hull]
self.deactivate()
self._hull.destroy()
<STRONG> def show</STRONG>(self):
if self.state() == <FONT COLOR="#009900">'normal'</FONT>:
self.tkraise()
else:
if self._firstShowing:
self._firstShowing = 0
else:
geometry = self.geometry()
index = string.find(geometry, <FONT COLOR="#009900">'+'</FONT>)
if index >= 0:
self.geometry(geometry[index:])
self.deiconify()
<STRONG> def activate</STRONG>(self, globalMode=0, master=None):
if self.state() == <FONT COLOR="#009900">'normal'</FONT>:
self.withdraw()
if self._active == <FONT COLOR="#009900">'yes'</FONT>:
raise ValueError, <FONT COLOR="#009900">'Window is already active'</FONT>
if self._active == <FONT COLOR="#009900">'waiting'</FONT>:
return
if master is not None:
self.transient(master)
if len(MegaToplevel._grabStack) > 0:
widget = MegaToplevel._grabStack[-1][0]
widget.grab_release()
MegaToplevel._grabStack.append(self, globalMode)
showbusycursor()
if self._wait is None:
self._wait = Tkinter.IntVar()
self._wait.set(0)
self._active = <FONT COLOR="#009900">'waiting'</FONT>
<FONT COLOR="#DD0000"># Centre the window on the screen. (Actually halfway across and</FONT>
<FONT COLOR="#DD0000"># one third down.)</FONT>
self.update_idletasks()
<FONT COLOR="#DD0000"># I'm not sure what the winfo_vroot[xy] stuff does, but tk_dialog</FONT>
<FONT COLOR="#DD0000"># does it, so...</FONT>
<FONT COLOR="#DD0000">#x = (self.winfo_screenwidth() - self.winfo_reqwidth()) / 2</FONT>
<FONT COLOR="#DD0000">#y = (self.winfo_screenheight() - self.winfo_reqheight()) / 3</FONT>
x = (self.winfo_screenwidth() - self.winfo_reqwidth()) / 2 \
- self.winfo_vrootx()
y = (self.winfo_screenheight() - self.winfo_reqheight()) / 3 \
- self.winfo_vrooty()
if x < 0:
x = 0
if y < 0:
y = 0
self.geometry(<FONT COLOR="#009900">'+%s+%s'</FONT> % (x, y))
self.deiconify()
self.wait_visibility()
self._active = <FONT COLOR="#009900">'yes'</FONT>
while 1:
try:
if globalMode:
self.grab_set_global()
else:
self.grab_set()
break
except Tkinter.TclError:
sys.exc_traceback = None <FONT COLOR="#DD0000"># Clean up object references</FONT>
<FONT COLOR="#DD0000"># Another application has grab. Keep trying until</FONT>
<FONT COLOR="#DD0000"># grab can succeed.</FONT>
self.after(100)
self.focus_set()
command = self[<FONT COLOR="#009900">'activatecommand'</FONT>]
if callable(command):
command()
self.wait_variable(self._wait)
return self._result
<FONT COLOR="#DD0000"># TBD</FONT>
<FONT COLOR="#DD0000"># This is how tk_dialog handles the focus and grab:</FONT>
<FONT COLOR="#DD0000"># # 7. Set a grab and claim the focus too.</FONT>
<FONT COLOR="#DD0000"># </FONT>
<FONT COLOR="#DD0000"># set oldFocus [focus]</FONT>
<FONT COLOR="#DD0000"># set oldGrab [grab current $w]</FONT>
<FONT COLOR="#DD0000"># if {$oldGrab != ""} {</FONT>
<FONT COLOR="#DD0000"># set grabStatus [grab status $oldGrab]</FONT>
<FONT COLOR="#DD0000"># }</FONT>
<FONT COLOR="#DD0000"># grab $w</FONT>
<FONT COLOR="#DD0000"># if {$default >= 0} {</FONT>
<FONT COLOR="#DD0000"># focus $w.button$default</FONT>
<FONT COLOR="#DD0000"># } else {</FONT>
<FONT COLOR="#DD0000"># focus $w</FONT>
<FONT COLOR="#DD0000"># }</FONT>
<FONT COLOR="#DD0000"># </FONT>
<FONT COLOR="#DD0000"># # 8. Wait for the user to respond, then restore the focus and</FONT>
<FONT COLOR="#DD0000"># # return the index of the selected button. Restore the focus</FONT>
<FONT COLOR="#DD0000"># # before deleting the window, since otherwise the window manager</FONT>
<FONT COLOR="#DD0000"># # may take the focus away so we can't redirect it. Finally,</FONT>
<FONT COLOR="#DD0000"># # restore any grab that was in effect.</FONT>
<FONT COLOR="#DD0000"># </FONT>
<FONT COLOR="#DD0000"># tkwait variable tkPriv(button)</FONT>
<FONT COLOR="#DD0000"># catch {focus $oldFocus}</FONT>
<FONT COLOR="#DD0000"># catch {</FONT>
<FONT COLOR="#DD0000"># # It's possible that the window has already been destroyed,</FONT>
<FONT COLOR="#DD0000"># # hence this "catch". Delete the Destroy handler so that</FONT>
<FONT COLOR="#DD0000"># # tkPriv(button) doesn't get reset by it.</FONT>
<FONT COLOR="#DD0000"># </FONT>
<FONT COLOR="#DD0000"># bind $w <Destroy> {}</FONT>
<FONT COLOR="#DD0000"># destroy $w</FONT>
<FONT COLOR="#DD0000"># }</FONT>
<FONT COLOR="#DD0000"># if {$oldGrab != ""} {</FONT>
<FONT COLOR="#DD0000"># if {$grabStatus == "global"} {</FONT>
<FONT COLOR="#DD0000"># grab -global $oldGrab</FONT>
<FONT COLOR="#DD0000"># } else {</FONT>
<FONT COLOR="#DD0000"># grab $oldGrab</FONT>
<FONT COLOR="#DD0000"># }</FONT>
<FONT COLOR="#DD0000"># }</FONT>
<STRONG> def deactivate</STRONG>(self, result=None):
if not self.active():
return
self._active = <FONT COLOR="#009900">'no'</FONT>
<FONT COLOR="#DD0000"># Deactivate any active windows above this on the stack.</FONT>
while len(MegaToplevel._grabStack) > 0:
if MegaToplevel._grabStack[-1][0] == self:
break
else:
MegaToplevel._grabStack[-1][0].deactivate()
<FONT COLOR="#DD0000"># Clean up this window.</FONT>
hidebusycursor()
self.withdraw()
self.grab_release()
<FONT COLOR="#DD0000"># Return the grab to the next active window in the stack, if any.</FONT>
del MegaToplevel._grabStack[-1]
if len(MegaToplevel._grabStack) > 0:
widget, globalMode = MegaToplevel._grabStack[-1]
if globalMode:
widget.grab_set_global()
else:
widget.grab_set()
self._result = result
self._wait.set(1)
<STRONG> def active</STRONG>(self):
return self._active != <FONT COLOR="#009900">'no'</FONT>
forwardmethods(MegaToplevel, Tkinter.Toplevel, <FONT COLOR="#009900">'_hull'</FONT>)
<FONT COLOR="#DD0000">#=============================================================================</FONT>
<STRONG><FONT COLOR="#CC6600">class MegaWidget</FONT></STRONG>(MegaArchetype):
<FONT COLOR="#DD0000"># Frame megawidget base class.</FONT>
<FONT COLOR="#DD0000">#</FONT>
<FONT COLOR="#DD0000"># The MegaWidget class inherits everything from the MegaArchetype</FONT>
# class, and adds a Tkinter Frame called the <FONT COLOR="#009900">'hull'</FONT> component to
<FONT COLOR="#DD0000"># represent the body of the megawidget. The window class name for</FONT>
<FONT COLOR="#DD0000"># the hull is set to the most-specific class name for the</FONT>
<FONT COLOR="#DD0000"># megawidget. The class acts as the base class of megawidgets</FONT>
<FONT COLOR="#DD0000"># that are not contained in their own toplevel window. Derived</FONT>
<FONT COLOR="#DD0000"># classes specialize this widget by creating other widget</FONT>
<FONT COLOR="#DD0000"># components as children of the hull.</FONT>
<FONT COLOR="#DD0000">#</FONT>
<FONT COLOR="#DD0000"># The MegaWidget class forwards all Tkinter Frame methods on to</FONT>
<FONT COLOR="#DD0000"># the hull component. For example, methods such as pack and</FONT>
<FONT COLOR="#DD0000"># configure and all the winfo_ methods can be used with a</FONT>
<FONT COLOR="#DD0000"># MegaWidget.</FONT>
<FONT COLOR="#DD0000">#</FONT>
<FONT COLOR="#DD0000"># Components</FONT>
<FONT COLOR="#DD0000"># hull exterior of the megawidget (a Tkinter Frame)</FONT>
<FONT COLOR="#DD0000"># Options</FONT>
<FONT COLOR="#DD0000"># background forwarded to hull component</FONT>
<FONT COLOR="#DD0000"># cursor forwarded to hull component</FONT>
<STRONG> def __init__</STRONG>(self, parent = None, **kw):
<FONT COLOR="#DD0000"># Define the options for this megawidget.</FONT>
optiondefs = (
(<FONT COLOR="#009900">'hull_class'</FONT>, self.__class__.__name__, None),
)
self.defineoptions(kw, optiondefs)
<FONT COLOR="#DD0000"># Initialise the base class (after defining the options).</FONT>
MegaArchetype.__init__(self, parent, Tkinter.Frame)
<STRONG> def destroy</STRONG>(self):
del _hullToMegaWidget[self._hull]
self._hull.destroy()
forwardmethods(MegaWidget, Tkinter.Frame, <FONT COLOR="#009900">'_hull'</FONT>)
<FONT COLOR="#DD0000">#=============================================================================</FONT>
<FONT COLOR="#DD0000"># Public functions</FONT>
<FONT COLOR="#DD0000">#-----------------</FONT>
<STRONG>def tracetk</STRONG>(root, on, withStackTrace = 0, file=None):
global _withStackTrace
_withStackTrace = withStackTrace
if on:
if hasattr(root.tk, <FONT COLOR="#009900">'__class__'</FONT>):
<FONT COLOR="#DD0000"># Tracing already on</FONT>
return
tk = _TraceTk(root.tk, file)
else:
if not hasattr(root.tk, <FONT COLOR="#009900">'__class__'</FONT>):
<FONT COLOR="#DD0000"># Tracing already off</FONT>
return
tk = root.tk.getTclInterp()
_setTkInterps(root, tk)
<STRONG>def showbusycursor</STRONG>():
__addRootToToplevelBusyCount()
doUpdate = 0
for window in _toplevelBusyInfo.keys():
if window.state() != <FONT COLOR="#009900">'withdrawn'</FONT>:
_toplevelBusyInfo[window][0] = _toplevelBusyInfo[window][0] + 1
if _haveblt(window):
if _toplevelBusyInfo[window][0] == 1:
_busy_hold(window)
<FONT COLOR="#DD0000"># Make sure that no events for the busy window get</FONT>
<FONT COLOR="#DD0000"># through to Tkinter, otherwise it will crash in</FONT>
# _nametowidget with a <FONT COLOR="#009900">'KeyError: _Busy'</FONT> if there is
<FONT COLOR="#DD0000"># a binding on the toplevel window.</FONT>
if window._w == <FONT COLOR="#009900">'.'</FONT>:
busyWindow = <FONT COLOR="#009900">'._Busy'</FONT>
else:
busyWindow = window._w + <FONT COLOR="#009900">'._Busy'</FONT>
window.tk.call(<FONT COLOR="#009900">'bindtags'</FONT>, busyWindow, <FONT COLOR="#009900">'Pmw_Dummy_Tag'</FONT>)
<FONT COLOR="#DD0000"># Remember previous focus window and set focus to</FONT>
<FONT COLOR="#DD0000"># the busy window, which should ignore all events.</FONT>
lastFocus = window.tk.call(<FONT COLOR="#009900">'focus'</FONT>)
_toplevelBusyInfo[window][1] = \
window.tk.call(<FONT COLOR="#009900">'focus'</FONT>, <FONT COLOR="#009900">'-lastfor'</FONT>, window._w)
window.tk.call(<FONT COLOR="#009900">'focus'</FONT>, busyWindow)
if _toplevelBusyInfo[window][1] != lastFocus:
window.tk.call(<FONT COLOR="#009900">'focus'</FONT>, lastFocus)
doUpdate = 1
if doUpdate:
window.update_idletasks()
<STRONG>def hidebusycursor</STRONG>():
__addRootToToplevelBusyCount()
for window in _toplevelBusyInfo.keys():
if _toplevelBusyInfo[window][0] > 0:
_toplevelBusyInfo[window][0] = _toplevelBusyInfo[window][0] - 1
if _haveblt(window):
if _toplevelBusyInfo[window][0] == 0:
_busy_release(window)
lastFocus = window.tk.call(<FONT COLOR="#009900">'focus'</FONT>)
try:
window.tk.call(<FONT COLOR="#009900">'focus'</FONT>, _toplevelBusyInfo[window][1])
except Tkinter.TclError:
<FONT COLOR="#DD0000"># Previous focus widget has been deleted. Set focus</FONT>
<FONT COLOR="#DD0000"># to toplevel window instead (can't leave focus on</FONT>
<FONT COLOR="#DD0000"># busy window).</FONT>
sys.exc_traceback = None <FONT COLOR="#DD0000"># Clean up object references</FONT>
window.focus_set()
if window._w == <FONT COLOR="#009900">'.'</FONT>:
busyWindow = <FONT COLOR="#009900">'._Busy'</FONT>
else:
busyWindow = window._w + <FONT COLOR="#009900">'._Busy'</FONT>
if lastFocus != busyWindow:
window.tk.call(<FONT COLOR="#009900">'focus'</FONT>, lastFocus)
<STRONG>def clearbusycursor</STRONG>():
__addRootToToplevelBusyCount()
for window in _toplevelBusyInfo.keys():
if _toplevelBusyInfo[window][0] > 0:
_toplevelBusyInfo[window][0] = 0
if _haveblt(window):
_busy_release(window)
try:
window.tk.call(<FONT COLOR="#009900">'focus'</FONT>, _toplevelBusyInfo[window][1])
except Tkinter.TclError:
<FONT COLOR="#DD0000"># Previous focus widget has been deleted. Set focus</FONT>
<FONT COLOR="#DD0000"># to toplevel window instead (can't leave focus on</FONT>
<FONT COLOR="#DD0000"># busy window).</FONT>
sys.exc_traceback = None <FONT COLOR="#DD0000"># Clean up object references</FONT>
window.focus_set()
<STRONG>def busycallback</STRONG>(command, updateFunction = None):
if not callable(command):
raise RuntimeError, \
<FONT COLOR="#009900">'cannot register non-command busy callback %s %s'</FONT> % \
(repr(command), type(command))
wrapper = _BusyWrapper(command, updateFunction)
return wrapper.callback
<STRONG>def reporterrorstofile</STRONG>(file = None):
global _errorReportFile
_errorReportFile = file
<STRONG>def displayerror</STRONG>(text):
global _errorWindow
if _errorWindow is None:
<FONT COLOR="#DD0000"># The error window has not yet been created.</FONT>
_errorWindow = _ErrorWindow()
_errorWindow.showerror(text)
<STRONG>def initialise</STRONG>(root = None, size = None, fontScheme = None, useTkOptionDb = 0):
<FONT COLOR="#DD0000"># Save flag specifying whether the Tk option database should be</FONT>
<FONT COLOR="#DD0000"># queried when setting megawidget option default values.</FONT>
global _useTkOptionDb
_useTkOptionDb = useTkOptionDb
<FONT COLOR="#DD0000"># If we haven't been given a root window, use the default or</FONT>
<FONT COLOR="#DD0000"># create one.</FONT>
if root is None:
if Tkinter._default_root is None:
root = Tkinter.Tk()
else:
root = Tkinter._default_root
<FONT COLOR="#DD0000"># Trap Tkinter Toplevel constructors so that a list of Toplevels</FONT>
<FONT COLOR="#DD0000"># can be maintained.</FONT>
Tkinter.Toplevel.title = __TkinterToplevelTitle
<FONT COLOR="#DD0000"># Trap Tkinter widget destruction so that megawidgets can be</FONT>
<FONT COLOR="#DD0000"># destroyed when their hull widget is destoyed and the list of</FONT>
<FONT COLOR="#DD0000"># Toplevels can be pruned.</FONT>
Tkinter.Toplevel.destroy = __TkinterToplevelDestroy
Tkinter.Frame.destroy = __TkinterFrameDestroy
<FONT COLOR="#DD0000"># Modify Tkinter's CallWrapper class to improve the display of</FONT>
<FONT COLOR="#DD0000"># errors which occur in callbacks.</FONT>
Tkinter.CallWrapper = __TkinterCallWrapper
<FONT COLOR="#DD0000"># Make sure we get to know when the window manager deletes the</FONT>
<FONT COLOR="#DD0000"># root window. Only do this if the protocol has not yet been set. </FONT>
<FONT COLOR="#DD0000"># This is required if there is a modal dialog displayed and the</FONT>
<FONT COLOR="#DD0000"># window manager deletes the root window. Otherwise the</FONT>
<FONT COLOR="#DD0000"># application will not exit, even though there are no windows.</FONT>
if root.protocol(<FONT COLOR="#009900">'WM_DELETE_WINDOW'</FONT>) == <FONT COLOR="#009900">''</FONT>:
root.protocol(<FONT COLOR="#009900">'WM_DELETE_WINDOW'</FONT>, root.destroy)
<FONT COLOR="#DD0000"># Set the base font size for the application and set the</FONT>
<FONT COLOR="#DD0000"># Tk option database font resources.</FONT>
import PmwLogicalFont
PmwLogicalFont.initialise(root, size, fontScheme)
return root
<STRONG>def alignlabels</STRONG>(widgets, sticky = None):
if len(widgets) == 0:
return
widgets[0].update_idletasks()
<FONT COLOR="#DD0000"># Determine the size of the maximum length label string.</FONT>
maxLabelWidth = 0
for iwid in widgets:
labelWidth = iwid.grid_bbox(0, 1)[2]
if labelWidth > maxLabelWidth:
maxLabelWidth = labelWidth
<FONT COLOR="#DD0000"># Adjust the margins for the labels such that the child sites and</FONT>
<FONT COLOR="#DD0000"># labels line up.</FONT>
for iwid in widgets:
if sticky is not None:
iwid.component(<FONT COLOR="#009900">'label'</FONT>).grid(sticky=sticky)
iwid.grid_columnconfigure(0, minsize = maxLabelWidth)
<FONT COLOR="#DD0000">#=============================================================================</FONT>
<FONT COLOR="#DD0000"># Private routines</FONT>
<FONT COLOR="#DD0000">#-----------------</FONT>
<STRONG><FONT COLOR="#CC6600">class _TraceTk</FONT></STRONG>:
<STRONG> def __init__</STRONG>(self, tclInterp, file):
self.tclInterp = tclInterp
if file is None:
self.file = sys.stderr
else:
self.file = file
self.recursionCounter = 0
<STRONG> def getTclInterp</STRONG>(self):
return self.tclInterp
<STRONG> def call</STRONG>(self, *args, **kw):
file = self.file
file.write(<FONT COLOR="#009900">'='</FONT> * 60 + <FONT COLOR="#009900">'\n'</FONT>)
file.write(<FONT COLOR="#009900">'tk call:'</FONT> + str(args) + <FONT COLOR="#009900">'\n'</FONT>)
self.recursionCounter = self.recursionCounter + 1
recursionStr = str(self.recursionCounter)
if self.recursionCounter > 1:
file.write(<FONT COLOR="#009900">'recursion: '</FONT> + recursionStr + <FONT COLOR="#009900">'\n'</FONT>)
result = apply(self.tclInterp.call, args, kw)
if self.recursionCounter > 1:
file.write(<FONT COLOR="#009900">'end recursion: '</FONT> + recursionStr + <FONT COLOR="#009900">'\n'</FONT>)
self.recursionCounter = self.recursionCounter - 1
if result:
file.write(<FONT COLOR="#009900">' result:'</FONT> + str(result) + <FONT COLOR="#009900">'\n'</FONT>)
if _withStackTrace:
file.write(<FONT COLOR="#009900">'stack:\n'</FONT>)
traceback.print_stack()
return result
<STRONG> def __getattr__</STRONG>(self, key):
return getattr(self.tclInterp, key)
<STRONG>def _setTkInterps</STRONG>(window, tk):
window.tk = tk
for child in window.children.values():
_setTkInterps(child, tk)
<FONT COLOR="#DD0000">#=============================================================================</FONT>
<FONT COLOR="#DD0000"># Functions to display a busy cursor. Keep a list of all toplevels</FONT>
<FONT COLOR="#DD0000"># and display the busy cursor over them. The list will contain the Tk</FONT>
<FONT COLOR="#DD0000"># root toplevel window as well as all other toplevel windows.</FONT>
<FONT COLOR="#DD0000"># Also keep a list of the widget which last had focus for each</FONT>
<FONT COLOR="#DD0000"># toplevel.</FONT>
_toplevelBusyInfo = {}
<FONT COLOR="#DD0000"># Pmw needs to know all toplevel windows, so that it can call blt busy</FONT>
<FONT COLOR="#DD0000"># on them. This is a hack so we get notified when a Tk topevel is</FONT>
# created. Ideally, the __init__ <FONT COLOR="#009900">'method'</FONT> should be overridden, but
# it is a <FONT COLOR="#009900">'read-only special attribute'</FONT>. Luckily, title() is always
<FONT COLOR="#DD0000"># called from the Tkinter Toplevel constructor.</FONT>
<STRONG>def __TkinterToplevelTitle</STRONG>(self, *args):
<FONT COLOR="#DD0000"># If this is being called from the constructor, include this</FONT>
<FONT COLOR="#DD0000"># Toplevel in the list of toplevels and set the initial</FONT>
<FONT COLOR="#DD0000"># WM_DELETE_WINDOW protocol to destroy() so that we get to know</FONT>
<FONT COLOR="#DD0000"># about it.</FONT>
if not _toplevelBusyInfo.has_key(self):
_toplevelBusyInfo[self] = [0, None]
self.protocol(<FONT COLOR="#009900">'WM_DELETE_WINDOW'</FONT>, self.destroy)
return apply(Tkinter.Wm.title, (self,) + args)
_bltImported = 0
<STRONG>def _importBlt</STRONG>(window):
global _bltImported, _bltOK, _busy_hold, _busy_release
import PmwBlt
_bltOK = PmwBlt.haveblt(window)
_busy_hold = PmwBlt.busy_hold
_busy_release = PmwBlt.busy_release
_bltImported = 1
<STRONG>def _haveblt</STRONG>(window):
if not _bltImported:
_importBlt(window)
return _bltOK
<STRONG>def __addRootToToplevelBusyCount</STRONG>():
<FONT COLOR="#DD0000"># Since we do not know when Tkinter will be initialised, we have</FONT>
<FONT COLOR="#DD0000"># to include the Tk root window in the list of toplevels at the</FONT>
<FONT COLOR="#DD0000"># last minute.</FONT>
root = Tkinter._default_root
if not _toplevelBusyInfo.has_key(root):
_toplevelBusyInfo[root] = [0, None]
<STRONG><FONT COLOR="#CC6600">class _BusyWrapper</FONT></STRONG>:
<STRONG> def __init__</STRONG>(self, command, updateFunction):
self._command = command
self._updateFunction = updateFunction
<STRONG> def callback</STRONG>(self, *args):
showbusycursor()
rtn = apply(self._command, args)
<FONT COLOR="#DD0000"># Call update before hiding the busy windows to clear any</FONT>
<FONT COLOR="#DD0000"># events that may have occurred over the busy windows.</FONT>
if callable(self._updateFunction):
self._updateFunction()
hidebusycursor()
return rtn
<FONT COLOR="#DD0000">#=============================================================================</FONT>
<FONT COLOR="#DD0000"># Modify the Tkinter destroy methods so that it notifies us when a Tk</FONT>
<FONT COLOR="#DD0000"># toplevel or frame is destroyed.</FONT>
# A map from the <FONT COLOR="#009900">'hull'</FONT> component of a megawidget to the megawidget.
<FONT COLOR="#DD0000"># This is used to clean up a megawidget when its hull is destroyed.</FONT>
_hullToMegaWidget = {}
<STRONG>def __TkinterToplevelDestroy</STRONG>(tkWidget):
if _hullToMegaWidget.has_key(tkWidget):
mega = _hullToMegaWidget[tkWidget]
try:
mega.destroy()
except:
_reporterror(mega.destroy, ())
sys.exc_traceback = None <FONT COLOR="#DD0000"># Clean up object references</FONT>
else:
del _toplevelBusyInfo[tkWidget]
Tkinter.Widget.destroy(tkWidget)
<STRONG>def __TkinterFrameDestroy</STRONG>(tkWidget):
if _hullToMegaWidget.has_key(tkWidget):
mega = _hullToMegaWidget[tkWidget]
try:
mega.destroy()
except:
_reporterror(mega.destroy, ())
sys.exc_traceback = None <FONT COLOR="#DD0000"># Clean up object references</FONT>
else:
Tkinter.Widget.destroy(tkWidget)
<STRONG>def hulltomegawidget</STRONG>(tkWidget):
return _hullToMegaWidget[tkWidget]
<FONT COLOR="#DD0000">#=============================================================================</FONT>
<FONT COLOR="#DD0000"># Add code to Tkinter to improve the display of errors which occur in</FONT>
<FONT COLOR="#DD0000"># callbacks.</FONT>
<STRONG><FONT COLOR="#CC6600">class __TkinterCallWrapper</FONT></STRONG>:
<STRONG> def __init__</STRONG>(self, func, subst, widget):
self.func = func
self.subst = subst
self.widget = widget
<STRONG> def __call__</STRONG>(self, *args):
try:
if self.subst:
args = apply(self.subst, args)
return apply(self.func, args)
except SystemExit, msg:
raise SystemExit, msg
except:
_reporterror(self.func, args)
sys.exc_traceback = None <FONT COLOR="#DD0000"># Clean up object references</FONT>
_eventTypeToName = {
2 : <FONT COLOR="#009900">'KeyPress'</FONT>,
3 : <FONT COLOR="#009900">'KeyRelease'</FONT>,
4 : <FONT COLOR="#009900">'ButtonPress'</FONT>,
5 : <FONT COLOR="#009900">'ButtonRelease'</FONT>,
6 : <FONT COLOR="#009900">'MotionNotify'</FONT>,
7 : <FONT COLOR="#009900">'EnterNotify'</FONT>,
8 : <FONT COLOR="#009900">'LeaveNotify'</FONT>,
9 : <FONT COLOR="#009900">'FocusIn'</FONT>,
10 : <FONT COLOR="#009900">'FocusOut'</FONT>,
11 : <FONT COLOR="#009900">'KeymapNotify'</FONT>,
12 : <FONT COLOR="#009900">'Expose'</FONT>,
13 : <FONT COLOR="#009900">'GraphicsExpose'</FONT>,
14 : <FONT COLOR="#009900">'NoExpose'</FONT>,
15 : <FONT COLOR="#009900">'VisibilityNotify'</FONT>,
16 : <FONT COLOR="#009900">'CreateNotify'</FONT>,
17 : <FONT COLOR="#009900">'DestroyNotify'</FONT>,
18 : <FONT COLOR="#009900">'UnmapNotify'</FONT>,
19 : <FONT COLOR="#009900">'MapNotify'</FONT>,
20 : <FONT COLOR="#009900">'MapRequest'</FONT>,
21 : <FONT COLOR="#009900">'ReparentNotify'</FONT>,
22 : <FONT COLOR="#009900">'ConfigureNotify'</FONT>,
23 : <FONT COLOR="#009900">'ConfigureRequest'</FONT>,
24 : <FONT COLOR="#009900">'GravityNotify'</FONT>,
25 : <FONT COLOR="#009900">'ResizeRequest'</FONT>,
26 : <FONT COLOR="#009900">'CirculateNotify'</FONT>,
27 : <FONT COLOR="#009900">'CirculateRequest'</FONT>,
28 : <FONT COLOR="#009900">'PropertyNotify'</FONT>,
29 : <FONT COLOR="#009900">'SelectionClear'</FONT>,
30 : <FONT COLOR="#009900">'SelectionRequest'</FONT>,
31 : <FONT COLOR="#009900">'SelectionNotify'</FONT>,
32 : <FONT COLOR="#009900">'ColormapNotify'</FONT>,
33 : <FONT COLOR="#009900">'ClientMessage'</FONT>,
34 : <FONT COLOR="#009900">'MappingNotify'</FONT>,
}
<STRONG>def _reporterror</STRONG>(func, args):
<FONT COLOR="#DD0000"># Save current exception values, just in case a new one occurs.</FONT>
exc_type, exc_value, exc_traceback = \
sys.exc_type, sys.exc_value, sys.exc_traceback
<FONT COLOR="#DD0000"># Give basic information about the callback exception.</FONT>
if type(exc_type) == types.ClassType:
<FONT COLOR="#DD0000"># Handle python 1.5 class exceptions.</FONT>
exc_type = exc_type.__name__
msg = exc_type + <FONT COLOR="#009900">' Exception in Tk callback\n'</FONT>
msg = msg + <FONT COLOR="#009900">' Function: %s (type: %s)\n'</FONT> % (repr(func), type(func))
msg = msg + <FONT COLOR="#009900">' Args: %s\n'</FONT> % str(args)
if type(args) == types.TupleType and len(args) > 0 and \
hasattr(args[0], <FONT COLOR="#009900">'type'</FONT>):
eventArg = 1
else:
eventArg = 0
<FONT COLOR="#DD0000"># If the argument to the callback is an event, add the event type.</FONT>
if eventArg:
eventNum = string.atoi(args[0].type)
msg = msg + <FONT COLOR="#009900">' Event type: %s\n'</FONT> % _eventTypeToName[eventNum]
<FONT COLOR="#DD0000"># Add the traceback.</FONT>
msg = msg + <FONT COLOR="#009900">'Traceback (innermost last):\n'</FONT>
for tr in traceback.extract_tb(exc_traceback):
msg = msg + <FONT COLOR="#009900">' File "%s", line %s, in %s\n'</FONT> % (tr[0], tr[1], tr[2])
msg = msg + <FONT COLOR="#009900">' %s\n'</FONT> % tr[3]
msg = msg + <FONT COLOR="#009900">'%s: %s\n'</FONT> % (exc_type, exc_value)
<FONT COLOR="#DD0000"># If the argument to the callback is an event, add the event contents.</FONT>
if eventArg:
msg = msg + <FONT COLOR="#009900">'\n================================================\n'</FONT>
msg = msg + <FONT COLOR="#009900">' Event contents:\n'</FONT>
keys = args[0].__dict__.keys()
keys.sort()
for key in keys:
msg = msg + <FONT COLOR="#009900">' %s: %s\n'</FONT> % (key, args[0].__dict__[key])
clearbusycursor()
if _errorReportFile is not None:
_errorReportFile.write(msg + <FONT COLOR="#009900">'\n'</FONT>)
else:
try:
displayerror(msg)
except:
exc_type, exc_value, exc_traceback = \
sys.exc_type, sys.exc_value, sys.exc_traceback
print <FONT COLOR="#009900">'Failed to display error window.'</FONT>
print <FONT COLOR="#009900">'Original error was:'</FONT>
print msg
_errorReportFile = None
_errorWindow = None
<STRONG><FONT COLOR="#CC6600">class _ErrorWindow</FONT></STRONG>:
<STRONG> def __init__</STRONG>(self):
self._errorQueue = []
self._errorCount = 0
self._open = 0
<FONT COLOR="#DD0000"># Create the toplevel window</FONT>
self._top = Tkinter.Toplevel()
self._top.protocol(<FONT COLOR="#009900">'WM_DELETE_WINDOW'</FONT>, self._hide)
self._top.title(<FONT COLOR="#009900">'Error in background function'</FONT>)
self._top.iconname(<FONT COLOR="#009900">'Background error'</FONT>)
<FONT COLOR="#DD0000"># Create the text widget and scrollbar in a frame</FONT>
upperframe = Tkinter.Frame(self._top)
scrollbar = Tkinter.Scrollbar(upperframe, orient=<FONT COLOR="#009900">'vertical'</FONT>)
scrollbar.pack(side = <FONT COLOR="#009900">'right'</FONT>, fill = <FONT COLOR="#009900">'y'</FONT>)
self._text = Tkinter.Text(upperframe, yscrollcommand=scrollbar.set)
self._text.pack(fill = <FONT COLOR="#009900">'both'</FONT>, expand = 1)
scrollbar.configure(command=self._text.yview)
<FONT COLOR="#DD0000"># Create the buttons and label in a frame</FONT>
lowerframe = Tkinter.Frame(self._top)
ignore = Tkinter.Button(lowerframe,
text = <FONT COLOR="#009900">'Ignore remaining errors'</FONT>, command = self._hide)
ignore.pack(side=<FONT COLOR="#009900">'left'</FONT>)
self._nextError = Tkinter.Button(lowerframe,
text = <FONT COLOR="#009900">'Show next error'</FONT>, command = self._next)
self._nextError.pack(side=<FONT COLOR="#009900">'left'</FONT>)
self._label = Tkinter.Label(lowerframe, relief=<FONT COLOR="#009900">'ridge'</FONT>)
self._label.pack(side=<FONT COLOR="#009900">'left'</FONT>, fill=<FONT COLOR="#009900">'x'</FONT>, expand=1)
<FONT COLOR="#DD0000"># Pack the lower frame first so that it does not disappear</FONT>
<FONT COLOR="#DD0000"># when the window is resized.</FONT>
lowerframe.pack(side = <FONT COLOR="#009900">'bottom'</FONT>, fill = <FONT COLOR="#009900">'x'</FONT>)
upperframe.pack(side = <FONT COLOR="#009900">'bottom'</FONT>, fill = <FONT COLOR="#009900">'both'</FONT>, expand = 1)
<STRONG> def showerror</STRONG>(self, text):
if self._open:
self._errorQueue.append(text)
else:
self._display(text)
self._open = 1
<FONT COLOR="#DD0000"># Display the error window in the same place it was before.</FONT>
if self._top.state() == <FONT COLOR="#009900">'normal'</FONT>:
<FONT COLOR="#DD0000"># If update_idletasks is not called here, the window may</FONT>
<FONT COLOR="#DD0000"># be placed partially off the screen.</FONT>
self._top.update_idletasks()
self._top.tkraise()
else:
geometry = self._top.geometry()
index = string.find(geometry, <FONT COLOR="#009900">'+'</FONT>)
if index >= 0:
self._top.geometry(geometry[index:])
self._top.deiconify()
self._updateButtons()
<FONT COLOR="#DD0000"># Release any grab, so that buttons in the error window work.</FONT>
if len(MegaToplevel._grabStack) > 0:
widget = MegaToplevel._grabStack[-1][0]
widget.grab_release()
<STRONG> def _hide</STRONG>(self):
self._errorCount = self._errorCount + len(self._errorQueue)
self._errorQueue = []
self._top.withdraw()
self._open = 0
<STRONG> def _next</STRONG>(self):
<FONT COLOR="#DD0000"># Display the next error in the queue. </FONT>
text = self._errorQueue[0]
del self._errorQueue[0]
self._display(text)
self._updateButtons()
<STRONG> def _display</STRONG>(self, text):
self._errorCount = self._errorCount + 1
text = <FONT COLOR="#009900">'Error: %d\n%s'</FONT> % (self._errorCount, text)
self._text.delete(<FONT COLOR="#009900">'1.0'</FONT>, <FONT COLOR="#009900">'end'</FONT>)
self._text.insert(<FONT COLOR="#009900">'end'</FONT>, text)
<STRONG> def _updateButtons</STRONG>(self):
numQueued = len(self._errorQueue)
if numQueued > 0:
self._label.configure(text=<FONT COLOR="#009900">'%d more errors'</FONT> % numQueued)
self._nextError.configure(state=<FONT COLOR="#009900">'normal'</FONT>)
else:
self._label.configure(text=<FONT COLOR="#009900">'No more errors'</FONT>)
self._nextError.configure(state=<FONT COLOR="#009900">'disabled'</FONT>)
</PRE>
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