I am using Python 3 and Gtk+ 3.
I have a list of colors stored in a Gtk.ListStore. I want to display these colors as Gtk.ColorButton with a Gtk.CellRenderer so that the users would be able to view the colors and also change the colors too. My problem is that I do not know how to render/draw these buttons with a custom Gtk.CellRenderer.
Here is my code:
class CellRendererColorButton(Gtk.CellRenderer):
__gsignals__ = {
'color-set': (GObject.SIGNAL_RUN_FIRST, None, (str,))
}
color = GObject.property(type=str, default='rgb(0,0,255)')
def __init__(self):
super().__init__()
def do_set_property(self, pspec, value):
setattr(self, pspec.name, value)
def do_get_property(self, pspec):
return getattr(self, pspec.name)
# I have no idea about this
# def do_get_size(self, widget, cell_area):
# pass
def do_render(self, cr, widget, background_area, cell_area, flags):
# selected = (flags & Gtk.CellRendererState.SELECTED) != 0
# prelit = (flags & Gtk.CellRendererState.PRELIT) != 0
color1 = Gdk.RGBA()
succeed = color1.parse(self.color)
if not succeed:
color1.parse('rgb(0,0,255)')
button = Gtk.ColorButton.new_with_rgba(color1)
button.connect('color-set', self._on_color_set)
# now how do you actually render this button???
# now idea about this one too
# def do_activate(self, event, widget, path, background_area, cell_area,
# flags):
# pass
def _on_color_set(self, button, data=None):
self.emit("color-set", button.get_rgba().to_string())
class IcsListTreeView(Gtk.Box):
"""a Gtk.TreeView for displaying the ics event list"""
def __init__(self, win):
super().__init__(orientation=Gtk.Orientation.VERTICAL)
self.win = win
self.create_list_model()
self.add_defaults_to_model()
self.tree = Gtk.TreeView(self.store)
self.add_model_to_tree()
select = self.tree.get_selection()
select.set_mode(Gtk.SelectionMode.BROWSE)
# select.connect("changed", self.on_tree_selection_changed)
self.sw = Gtk.ScrolledWindow()
self.sw.set_policy(Gtk.PolicyType.AUTOMATIC, Gtk.PolicyType.AUTOMATIC)
self.sw.add(self.tree)
self.pack_start(self.sw, True, True, 0)
self.show_all()
def create_list_model(self):
# enabled, editable, description, path, color
self.store = Gtk.ListStore(bool, bool, str, str, str)
def add_model_to_tree(self):
renderer = Gtk.CellRendererToggle()
renderer.connect('toggled', self._on_active_toggled)
column = Gtk.TreeViewColumn("Enable", renderer, active=0)
self.tree.append_column(column)
renderer = Gtk.CellRendererText()
renderer.connect('edited', self._on_description_edited)
column = Gtk.TreeViewColumn("Description", renderer, text=2, editable=1)
self.tree.append_column(column)
renderer = CellRendererColorButton()
renderer.connect('color-set', self._on_color_changed)
column = Gtk.TreeViewColumn("Color", renderer, color=4)
self.tree.append_column(column)
renderer = Gtk.CellRendererText()
renderer.connect('edited', self._on_url_edited)
column = Gtk.TreeViewColumn("Path/Url", renderer, text=3, editable=1)
self.tree.append_column(column)
def add_defaults_to_model(self):
self.store.append(
[True, False, 'Holidays of Iran',
'https://www.google.com/calendar/ical/en.ir%23holi' +
'day%40group.v.calendar.google.com/public/basic.ics', 'blue'])
self.store.append([False, True, '', '', ''])
def _on_color_changed(self, cell, path, color, data=None):
iter1 = self.store.get_iter(path)
self.store[iter1][4] = color
I have found this question to be relevant but I cannot figure it out still. I also found this gem too but it is too complicated for me to understand :).