title = 'Pmw.ScrolledListBox demonstration'

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

import Tkinter
import Pmw

class Demo:
    def __init__(self, parent):
	# Create the ScrolledListBox.
	self.box = Pmw.ScrolledListBox(parent,
		items=('Sydney', 'Melbourne', 'Brisbane'),
		labelpos='nw',
		label_text='Cities',
		listbox_height = 6,
		selectioncommand=self.selectionCommand,
		dblclickcommand=self.defCmd,
		usehullsize = 1,
		hull_width = 200,
		hull_height = 200,
	)

	# 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 = 'top', 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 = 'top', 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.box.pack(fill = 'both', expand = 1, padx = 5, pady = 5)

        # Do this after packing the scrolled list box, so that the
        # window does not resize as soon as it appears (because
        # alignlabels has to do an update_idletasks).
	Pmw.alignlabels((hmode, vmode))

	# Add some more entries to the listbox.
	items = ('Andamooka', 'Coober Pedy', 'Innamincka', 'Oodnadatta')
	self.box.setlist(items)
	self.box.insert(2, 'Wagga Wagga', 'Perth', 'London')
	self.box.insert('end', 'Darwin', 'Auckland', 'New York')
	index = list(self.box.get(0, 'end')).index('London')
	self.box.delete(index)
	self.box.delete(7, 8)
	self.box.insert('end', 'Bulli', 'Alice Springs', 'Woy Woy')
	self.box.insert('end', 'Wallumburrawang', 'Willandra Billabong')

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

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

    def selectionCommand(self):
	sels = self.box.getcurselection()
	if len(sels) == 0:
	    print 'No selection'
	else:
	    print 'Selection:', sels[0]

    def defCmd(self):
	sels = self.box.getcurselection()
	if len(sels) == 0:
	    print 'No selection for double click'
	else:
	    print 'Double click:', sels[0]

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

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

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