#!/usr/bin/python3
"""
Controls the behaviour of the treeview for the layer-view.
This module contains the LayerTreeView class. It controls the behaviour and
appearance of the layer-view which is in the upper left side of the GUI. The
class inherits from Gtk.TreeView and requires a Gtk.TreeStore to initialize.
"""
from gi.repository import Gtk, Gdk
from .i18n import i18n
_ = i18n().language().gettext
class LayerTreeView(Gtk.TreeView):
"""
Controls the behaviour of the treeview for the layer-view.
This class controls the behaviour and appearance of the layer-view
which is in the upper left side of the GUI. The class inherits from
Gtk.TreeView and requires a Gtk.TreeStore to initialize.
"""
def __init__(self, store):
"""
Initializes the TreeViewColumns and some special behaviour.
Removes the headers, enables the tree-lines, turns the selection-mode
to multiple. Adds a column for the toggle, the pixbuf and the name
of the layer.
"""
Gtk.TreeView.__init__(self, model=store)
self.store = store
self.set_headers_visible(False)
self.set_enable_tree_lines(True)
self.select = self.get_selection()
self.select.set_mode(Gtk.SelectionMode.MULTIPLE)
self.set_property("can-focus", True)
targets = [("text/plain", 0, 0)]
self.enable_model_drag_source(Gdk.ModifierType.BUTTON1_MASK,
targets,
Gdk.DragAction.MOVE)
self.enable_model_drag_dest(targets, Gdk.DragAction.MOVE)
self.renderer_activate_layer = Gtk.CellRendererToggle()
self.column_activate_layer = Gtk.TreeViewColumn("",
self.renderer_activate_layer,
active=0)
self.append_column(self.column_activate_layer)
icon_renderer = Gtk.CellRendererPixbuf()
icon_column = Gtk.TreeViewColumn("", icon_renderer, pixbuf=1)
self.append_column(icon_column)
self.renderer_name = Gtk.CellRendererText(weight=700,
weight_set=True)
self.column_name = Gtk.TreeViewColumn(_("Layer"),
self.renderer_name, text=2)
self.column_name.set_min_width(100)
self.renderer_name.set_property("editable", True)
self.column_name.set_resizable(True)
self.append_column(self.column_name)
