title = 'Pmw.ScrolledText demonstration'

# Import Pmw from this directory tree.
import sys
sys.path[:0] = ['../../..']

import os
import Tkinter
import Pmw

class Demo:
    def __init__(self, parent):
	# Create the ScrolledText.
	self.st = Pmw.ScrolledText(parent,
		borderframe = 1,
		labelpos = 'n',
		label_text='ScrolledText.py',
		usehullsize = 1,
		hull_width = 400,
		hull_height = 300,
		text_padx = 10,
		text_pady = 10,
		text_wrap='none'
	)

	# Create a group widget to contain the scrollmode options.
	w = Pmw.Group(parent, tag_text='Scroll mode')
	w.pack(side = 'bottom', padx = 5, pady = 5)

	hmode = Pmw.OptionMenu(w.interior(),
		labelpos = 'w',
		label_text = 'Horizontal:',
		items = ['none', 'static', 'dynamic'],
		command = self.sethscrollmode,
		menubutton_width = 8,
	)
	hmode.pack(side = 'left', padx = 5, pady = 5)
	hmode.invoke('dynamic')

	vmode = Pmw.OptionMenu(w.interior(),
		labelpos = 'w',
		label_text = 'Vertical:',
		items = ['none', 'static', 'dynamic'],
		command = self.setvscrollmode,
		menubutton_width = 8,
	)
	vmode.pack(side = 'left', padx = 5, pady = 5)
	vmode.invoke('dynamic')

	buttonBox = Pmw.ButtonBox(parent)
	buttonBox.pack(side = 'bottom')
	buttonBox.add('yview', text = 'Show\nyview', command = self.showYView)
	buttonBox.add('scroll', text = 'Page\ndown', command = self.pageDown)
	buttonBox.add('center', text = 'Center', command = self.centerPage)

	# Pack this last so that the buttons do not get shrunk when
	# the window is resized.
	self.st.pack(padx = 5, pady = 5, fill = 'both', expand = 1)

	# Read this file into the text widget.
	head, tail = os.path.split(sys.argv[0])
	self.st.importfile(os.path.join(head,'ScrolledText.py'))

	self.st.insert('end', '\nThis demonstrates how to\n' +
	    'add a window to a text widget:  ')
	counter = Pmw.Counter(self.st.component('text'),
	    entryfield_value = 9999)
	self.st.window_create('end', window = counter)

    def sethscrollmode(self, tag):
	self.st.configure(hscrollmode = tag)

    def setvscrollmode(self, tag):
	self.st.configure(vscrollmode = tag)

    def showYView(self):
        print self.st.yview()

    def pageDown(self):
        self.st.yview('scroll', 1, 'page')

    def centerPage(self):
        top, bottom = self.st.yview()
        size = bottom - top
        middle = 0.5 - size / 2
        self.st.yview('moveto', middle)

######################################################################

# Create demo in root window for testing.
if __name__ == '__main__':
    root = Tkinter.Tk()
    Pmw.initialise(root)
    root.title(title)

    exitButton = Tkinter.Button(root, text = 'Exit', command = root.destroy)
    exitButton.pack(side = 'bottom')
    widget = Demo(root)
    root.mainloop()
