[pygtk] How to render a SpinButton in a TreeView?

Jiri Bajer sarimak at seznam.cz
Sun Dec 20 22:17:15 WST 2009


On Sun, 2009-11-01 at 06:26 +0100, Joel Juvenal Rivera Rivera wrote:
> I hope some one coud help me, i can't draw a spin button in a TreeView, 
> im using CellRendererSpin but how do i draw "the widget" not just the
> text o something like that (in the CellRendererText for example).

I used CellRendererSpin the following way - hope it helps a bit:

class CellRendererSpinFixed(gtk.CellRendererSpin):
	# the whole class is just a workaround for PyGTK bug 492196

	__gtype_name__ = 'CellRendererSpinFixed'

	def __init__(self):
		gtk.CellRendererSpin.__init__(self)

	def do_start_editing(self, event, treeview, path, background_area,
cell_area, flags):
		if not self.get_property('editable'):
			return
		spin = gtk.SpinButton(self.get_property('adjustment'))
		spin.connect('editing-done', self._editing_done, path)
		spin.connect('key-press-event', self._key_press_event, path)
		spin.connect('button-press-event', self._button_press_event)
		spin.show()
		spin.grab_focus()
		return spin

	def _editing_done(self, spin, path):
		self.emit('edited', path, spin.get_property('value'))

	def _key_press_event(self, spin, event, path):
		if event.type == gtk.gdk.KEY_PRESS:
			if gtk.gdk.keyval_name(event.keyval) == 'Up':
				spin.spin(gtk.SPIN_STEP_FORWARD)
				return True
			if gtk.gdk.keyval_name(event.keyval) == 'Down':
				spin.spin(gtk.SPIN_STEP_BACKWARD)
				return True

	def _button_press_event(self, spin, event):
		# avoid unwanted 'editing done' if the user clicks on spin arrows too
fast, see PyGTK bug 492196 for details
		if event.type == gtk.gdk._2BUTTON_PRESS or event.type ==
gtk.gdk._3BUTTON_PRESS:
			return True # we have already received all the clicks, throw away
additional signals telling it's double/tripleclick

---

		if column_type == 'spin':
			adjustment = gtk.Adjustment(lower=args['lower'], upper=args['upper'],
step_incr=1, page_incr=10)
			renderer = CellRendererSpinFixed() # replace with regular
cellrendererspin when bug 492196 gets finally fixed
			renderer.set_property('adjustment', adjustment)
			renderer.set_property('editable', True)
			renderer.set_property('digits', args['digits'])
			renderer.connect('edited', self._spin_update_model,
len(self._model_columns))
			column = gtk.TreeViewColumn(title, renderer,
text=len(self._model_columns))
			column.set_property('expand', False)
			column.set_property('reorderable', True)
			column.set_property('resizable', True)
			if args['digits']:
				self._model_columns.append(gobject.TYPE_FLOAT)
			else:
				self._model_columns.append(gobject.TYPE_INT)
			self._view_columns.append(column)
			return
---

	def _spin_update_model(self, renderer, path, new_text, column):
		"""
			Updates the model whenever the spin value changes.
		"""
		digits = renderer.get_property('digits')
		if digits > 0:
			try:
				new_value = float(new_text)
			except:
				return
			(integral, decimal) = new_text.split('.')
			new_text = integral + '.' + decimal[0:digits]
			new_value = float(new_text)
		else:
			try:
				new_value = int(float(new_text)) # direct conversion of float-string
to int raises an error
			except:
				return

self.model[self.sortable_model.convert_path_to_child_path(path)][column]
= new_value

---





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