Pmw/Pmw_1_2/demos/HistoryText.py

   1 title = 'Pmw.HistoryText demonstration'
   2
   3 # Import Pmw from this directory tree.
   4 import sys
   5 sys.path[:0] = ['../../..']
   6
   7 import Tkinter
   8 import Pmw
   9
  10 class Demo:
  11     def __init__(self, parent):
  12         # Create and pack the PanedWidget to hold the query and result
  13         # windows.
  14         # !! panedwidget should automatically size to requested size
  15         panedWidget = Pmw.PanedWidget(parent,
  16                 orient = 'vertical',
  17                 hull_height = 400,
  18                 hull_width = 550)
  19         panedWidget.add('query', min = 0.05, size = 0.2)
  20         panedWidget.add('buttons', min = 0.1, max = 0.1)
  21         panedWidget.add('results', min = 0.05)
  22         panedWidget.pack(fill = 'both', expand = 1)
  23
  24         # Create and pack the HistoryText.
  25         self.historyText = Pmw.HistoryText(panedWidget.pane('query'),
  26                 text_wrap = 'none',
  27                 text_width = 60,
  28                 text_height = 10,
  29                 historycommand = self.statechange,
  30         )
  31         self.historyText.pack(fill = 'both', expand = 1)
  32         self.historyText.component('text').focus()
  33
  34         buttonList = (
  35             [20, None],
  36             ['Clear', self.clear],
  37             ['Undo', self.historyText.undo],
  38             ['Redo', self.historyText.redo],
  39             [20, None],
  40             ['Prev', self.historyText.prev],
  41             ['Next', self.historyText.next],
  42             [30, None],
  43             ['Execute', Pmw.busycallback(self.executeQuery)],
  44         )
  45         self.buttonDict = {}
  46
  47         buttonFrame = panedWidget.pane('buttons')
  48         for text, cmd in buttonList:
  49             if type(text) == type(69):
  50                 frame = Tkinter.Frame(buttonFrame, width = text)
  51                 frame.pack(side = 'left')
  52             else:
  53                 button = Tkinter.Button(buttonFrame, text = text, command = cmd)
  54                 button.pack(side = 'left')
  55                 self.buttonDict[text] = button
  56
  57         for text in ('Prev', 'Next'):
  58             self.buttonDict[text].configure(state = 'disabled')
  59
  60         self.results = Pmw.ScrolledText(panedWidget.pane('results'), text_wrap = 'none')
  61         self.results.pack(fill = 'both', expand = 1)
  62
  63     def statechange(self, prevstate, nextstate):
  64         self.buttonDict['Prev'].configure(state = prevstate)
  65         self.buttonDict['Next'].configure(state = nextstate)
  66
  67     def clear(self):
  68         self.historyText.delete('1.0', 'end')
  69
  70     def addnewlines(self, text):
  71         if len(text) == 1:
  72             text = text + '\n'
  73         if text[-1] != '\n':
  74             text = text + '\n'
  75         if text[-2] != '\n':
  76             text = text + '\n'
  77         return text
  78
  79     def executeQuery(self):
  80         sql = self.historyText.get()
  81         self.results.insert('end', 'Query:\n' + self.addnewlines(sql))
  82         self.results.see('end')
  83         self.results.update_idletasks()
  84         self.historyText.addhistory()
  85         results = 'Results:\nfoo'
  86         if len(results) > 0:
  87             self.results.insert('end', self.addnewlines(results))
  88         self.results.see('end')
  89
  90
  91 ######################################################################
  92
  93 # Create demo in root window for testing.
  94 if __name__ == '__main__':
  95     root = Tkinter.Tk()
  96     Pmw.initialise(root)
  97     root.title(title)
  98
  99     exitButton = Tkinter.Button(root, text = 'Exit', command = root.destroy)
 100     exitButton.pack(side = 'bottom')
 101     widget = Demo(root)
 102     root.mainloop()