#! /usr/bin/env python import imp import os import regex import string import sys import types import Tkinter import DemoVersion import FontText # Find where the other scripts are, so they can be listed. #if __name__ == '__main__': # script_name = sys.argv[0] #else: # script_name = imp.find_module('DemoVersion')[1] #script_name = os.path.normpath(script_name) #script_name = DemoVersion.expandLinks(script_name) #script_dir = os.path.dirname(script_name) #script_dir = DemoVersion.expandLinks(script_dir) script_dir = '/usr/doc/python-pmw/examples' # Add the '../../..' directory to the path. #package_dir = os.path.dirname(script_dir) #package_dir = DemoVersion.expandLinks(package_dir) #package_dir = os.path.dirname(package_dir) #package_dir = DemoVersion.expandLinks(package_dir) #package_dir = os.path.dirname(package_dir) #package_dir = DemoVersion.expandLinks(package_dir) #sys.path[:0] = [package_dir] # Import Pmw after modifying sys.path (it may not be in the default path). import Pmw DemoVersion.setPmwVersion() class Demo(Pmw.MegaWidget): def __init__(self, parent=None, **kw): # Define the megawidget options. optiondefs = () self.defineoptions(kw, optiondefs) # Initialise the base class (after defining the options). Pmw.MegaWidget.__init__(self, parent) # Create the contents. top = self.interior() panes = Pmw.PanedWidget(top, orient = 'horizontal') panes.pack(fill = 'both', expand = 1) panes.add('widgetlist') self._widgetlist = Pmw.ScrolledListBox(panes.pane('widgetlist'), selectioncommand = Pmw.busycallback(self.startDemo), label_text = 'Select a widget:', labelpos = 'nw', vscrollmode = 'dynamic', hscrollmode = 'none', listbox_exportselection = 0) self._widgetlist.pack(fill = 'both', expand = 1, padx = 8) panes.add('info') self._status = Tkinter.Label(panes.pane('info')) self._status.pack(padx = 8, anchor = 'w') self._example = Tkinter.Frame(panes.pane('info'), borderwidth = 2, relief = 'sunken', background = 'white') self._example.pack(fill = 'both', expand = 1, padx = 8) self.buttonBox = Pmw.ButtonBox(top) self.buttonBox.pack(fill = 'x') # Add the buttons and make them all the same width. self._traceText = 'Trace tk calls' self._stopTraceText = 'Stop trace' self.buttonBox.add('Trace', text = self._traceText, command = self.trace) self.buttonBox.add('Code', text = 'Show code', command = self.showCode) self.buttonBox.add('Exit', text = 'Exit', command = sys.exit) self.buttonBox.alignbuttons() # Create the window to display the python code. self.codeWindow = Pmw.TextDialog(parent, title = 'Python source', buttons = ('Dismiss',), text_pyclass = FontText.Text, scrolledtext_labelpos = 'n', label_text = 'Source') self.codeWindow.withdraw() self.codeWindow.insert('end', '') self.demoName = None self._loadDemos() # Check keywords and initialise options. self.initialiseoptions(Demo) def startDemo(self): # Import the selected module and create and instance of the module's # Demo class. sels = self._widgetlist.getcurselection() if len(sels) == 0: print 'No demonstrations to display' return demoName = sels[0] # Ignore if this if it is a sub title. if demoName[0] != ' ': self._widgetlist.bell() return # Strip the leading two spaces. demoName = demoName[2:] # Ignore if this demo is already being shown. if self.demoName == demoName: return self.demoName = demoName self.showStatus('Loading ' + demoName) # Busy cursor self.update_idletasks() for window in self._example.winfo_children(): window.destroy() frame = Tkinter.Frame(self._example) frame.pack(expand = 1) try: exec 'import ' + demoName widget = eval(demoName + '.Demo(frame)') except: for window in frame.winfo_children(): window.destroy() exc_type = sys.exc_type if type(exc_type) == types.ClassType: # Handle python 1.5 class exceptions. exc_type = exc_type.__name__ text = 'Error loading ' + demoName + ': ' + \ exc_type + '\n' + str(sys.exc_value) err = Tkinter.Label(frame, background = 'white', wraplength = '4i', text = text) err.pack(expand = 1) self.showStatus('') if self.codeWindow.state() == 'normal': self.insertCode() def showStatus(self, text): self._status.configure(text = text) def showCode(self): if self.codeWindow.state() != 'normal': if self.demoName is None: print 'No demonstration selected' return self.insertCode() self.codeWindow.show() def insertCode(self): self.codeWindow.clear() fileName = os.path.join(script_dir, self.demoName + '.py') self.codeWindow.importfile(fileName) self.codeWindow.configure(label_text = self.demoName + ' source') def trace(self): text = self.buttonBox.component('Trace').cget('text') if text == self._traceText: self.buttonBox.configure(Trace_text = self._stopTraceText) Pmw.tracetk(root, 1) self.showStatus('Trace will appear on standard output') else: self.buttonBox.configure(Trace_text = self._traceText) Pmw.tracetk(root, 0) self.showStatus('Tk call tracing stopped') def _loadDemos(self): files = os.listdir(script_dir) files.sort() megawidgets = [] others = [] for file in files: if regex.search('.py$', file) >= 0 and \ file not in ['All.py', 'FontText.py', 'DemoVersion.py']: demoName = file[:-3] index = string.find(demoName, '_') if index < 0: testattr = demoName else: testattr = demoName[:index] if hasattr(Pmw, testattr): megawidgets.append(demoName) else: others.append(demoName) self._widgetlist.insert('end', 'Megawidget demos:') for name in megawidgets: self._widgetlist.insert('end', ' ' + name) self._widgetlist.insert('end', 'Other demos:') for name in others: self._widgetlist.insert('end', ' ' + name) self._widgetlist.select_set(1) class StdOut: def __init__(self, displayCommand): self.displayCommand = displayCommand self.text = '\n' def write(self, text): if self.text[-1] == '\n': self.text = text else: self.text = self.text + text if self.text[-1] == '\n': text = self.text[:-1] else: text = self.text self.displayCommand(text) root = Tkinter.Tk(className = 'Demo') Pmw.initialise(root, fontScheme = 'pmw1', useTkOptionDb = 1) Pmw.version() root.title('Pmw ' + Pmw.version() + ' megawidget demonstration') root.geometry('700x500') demo = Demo(root) demo.pack(fill = 'both', expand = 1) # Redirect standard output from demos to status line. sys.stdout = StdOut(demo.showStatus) # Start the first demo. demo.startDemo() root.mainloop()