/usr/share/mypaint/gui/layerswindow.py is in mypaint 1.2.0-4.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# Copyright (C) 2014 by Andrew Chadwick <a.t.chadwick@gmail.com>
# Copyright (C) 2009 by Ilya Portnov <portnov@bk.ru>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
"""Layers panel"""
## Imports
from gettext import gettext as _
import os.path
from logging import getLogger
logger = getLogger(__name__)
from gi.repository import Gtk
from gi.repository import Gdk
from gi.repository import GObject
from gi.repository import Pango
import lib.layer
import lib.xml
import widgets
from widgets import inline_toolbar
from workspace import SizedVBoxToolWidget
import layers
## Module constants
#: UI XML for the current layer's class (framework: ``layerswindow.xml``)
LAYER_CLASS_UI = [
(lib.layer.SurfaceBackedLayer, """
<popup name='LayersWindowPopup'>
<placeholder name="BasicLayerActions">
<menuitem action='CopyLayer'/>
</placeholder>
</popup>
"""),
(lib.layer.PaintingLayer, """
<popup name='LayersWindowPopup'>
<placeholder name="BasicLayerActions">
<menuitem action='PasteLayer'/>
<menuitem action='ClearLayer'/>
</placeholder>
<placeholder name='AdvancedLayerActions'>
<menuitem action='TrimLayer'/>
</placeholder>
</popup>
"""),
(lib.layer.ExternallyEditable, """
<popup name='LayersWindowPopup'>
<placeholder name='BasicLayerActions'>
<separator/>
<menuitem action='BeginExternalLayerEdit'/>
<menuitem action='CommitExternalLayerEdit'/>
<separator/>
</placeholder>
</popup>
"""),
]
## Class definitions
class LayersTool (SizedVBoxToolWidget):
"""Panel for arranging layers within a tree structure"""
## Class properties
tool_widget_icon_name = "mypaint-layers-symbolic"
tool_widget_title = _("Layers")
tool_widget_description = _("Arrange layers and assign effects")
LAYER_MODE_TOOLTIP_MARKUP_TEMPLATE = "<b>{name}</b>\n{description}"
#TRANSLATORS: tooltip for the opacity slider (text)
OPACITY_SCALE_TOOLTIP_TEXT_TEMPLATE = _("Layer opacity: %d%%")
__gtype_name__ = 'MyPaintLayersTool'
STATUSBAR_CONTEXT = 'layerstool-dnd'
#TRANSLATORS: status bar messages for drag, without/with modifiers
STATUSBAR_DRAG_MSG = _("Move layer in stack...")
STATUSBAR_DRAG_INTO_MSG = _("Move layer in stack (dropping into a "
"regular layer will create a new group)")
## Construction
def __init__(self):
GObject.GObject.__init__(self)
from application import get_app
app = get_app()
self.app = app
self.set_spacing(widgets.SPACING_CRAMPED)
self.set_border_width(widgets.SPACING_TIGHT)
# GtkTreeView init
docmodel = app.doc.model
view = layers.RootStackTreeView(docmodel)
self._treemodel = view.get_model()
self._treeview = view
# Motion and modifier keys during drag
view.current_layer_rename_requested += self._rename_current_layer_cb
view.current_layer_changed += self._blink_current_layer_cb
view.current_layer_menu_requested += self._popup_menu_cb
view.drag_began += self._view_drag_began_cb
view.drag_ended += self._view_drag_ended_cb
statusbar_cid = app.statusbar.get_context_id(self.STATUSBAR_CONTEXT)
self._drag_statusbar_context_id = statusbar_cid
# View scrolls
view_scroll = Gtk.ScrolledWindow()
view_scroll.set_shadow_type(Gtk.ShadowType.ETCHED_IN)
scroll_pol = Gtk.PolicyType.AUTOMATIC
view_scroll.set_policy(scroll_pol, scroll_pol)
view_scroll.add(view)
view_scroll.set_size_request(-1, 100)
view_scroll.set_hexpand(True)
view_scroll.set_vexpand(True)
# Context menu
ui_dir = os.path.dirname(os.path.abspath(__file__))
ui_path = os.path.join(ui_dir, "layerswindow.xml")
self.app.ui_manager.add_ui_from_file(ui_path)
menu = self.app.ui_manager.get_widget("/LayersWindowPopup")
menu.set_title(_("Layer"))
self.connect("popup-menu", self._popup_menu_cb)
menu.attach_to_widget(self, None)
self._menu = menu
self._layer_specific_ui_mergeids = []
self._layer_specific_ui_class = None
# Main layout grid
grid = Gtk.Grid()
grid.set_row_spacing(widgets.SPACING_TIGHT)
grid.set_column_spacing(widgets.SPACING)
# Mode dropdown
row = 0
label = Gtk.Label(label=_('Mode:'))
label.set_tooltip_text(
_("Blending mode: how the current layer combines with the "
"layers underneath it."))
label.set_alignment(0, 0.5)
label.set_hexpand(False)
grid.attach(label, 0, row, 1, 1)
store = Gtk.ListStore(int, str, bool)
modes = lib.layer.STACK_MODES + lib.layer.STANDARD_MODES
for mode in modes:
label, desc = lib.layer.MODE_STRINGS.get(mode)
store.append([mode, label, True])
combo = Gtk.ComboBox()
combo.set_model(store)
combo.set_hexpand(True)
cell = Gtk.CellRendererText()
combo.pack_start(cell)
combo.add_attribute(cell, "text", 1)
combo.add_attribute(cell, "sensitive", 2)
self._layer_mode_combo = combo
grid.attach(combo, 1, row, 5, 1)
# Opacity slider
row += 1
opacity_lbl = Gtk.Label(label=_('Opacity:'))
opacity_lbl.set_tooltip_text(
_("Layer opacity: how much of the current layer to use. "
"Smaller values make it more transparent."))
opacity_lbl.set_alignment(0, 0.5)
opacity_lbl.set_hexpand(False)
adj = Gtk.Adjustment(lower=0, upper=100,
step_incr=1, page_incr=10)
self._opacity_scale = Gtk.HScale(adj)
self._opacity_scale.set_draw_value(False)
self._opacity_scale.set_hexpand(True)
grid.attach(opacity_lbl, 0, row, 1, 1)
grid.attach(self._opacity_scale, 1, row, 5, 1)
# Layer list and controls
row += 1
layersbox = Gtk.VBox()
style = layersbox.get_style_context()
style.add_class(Gtk.STYLE_CLASS_LINKED)
style = view_scroll.get_style_context()
style.set_junction_sides(Gtk.JunctionSides.BOTTOM)
list_tools = inline_toolbar(
self.app,
[
("NewLayerGroupAbove", "mypaint-layer-group-new-symbolic"),
("NewPaintingLayerAbove", "mypaint-add-symbolic"),
("RemoveLayer", "mypaint-remove-symbolic"),
("RaiseLayerInStack", "mypaint-up-symbolic"),
("LowerLayerInStack", "mypaint-down-symbolic"),
("DuplicateLayer", None),
("MergeLayerDown", None),
]
)
style = list_tools.get_style_context()
style.set_junction_sides(Gtk.JunctionSides.TOP)
layersbox.pack_start(view_scroll, True, True)
layersbox.pack_start(list_tools, False, False)
layersbox.set_hexpand(True)
layersbox.set_vexpand(True)
grid.attach(layersbox, 0, row, 6, 1)
# Background layer controls
row += 1
show_bg_btn = Gtk.CheckButton()
change_bg_act = self.app.find_action("BackgroundWindow")
change_bg_btn = widgets.borderless_button(action=change_bg_act)
show_bg_act = self.app.find_action("ShowBackgroundToggle")
show_bg_btn.set_related_action(show_bg_act)
grid.attach(show_bg_btn, 0, row, 5, 1)
grid.attach(change_bg_btn, 5, row, 1, 1)
# Pack
self.pack_start(grid, False, True, 0)
# Updates from the real layers tree (TODO: move to lib/layers.py)
self._processing_model_updates = False
self._opacity_scale.connect('value-changed',
self._opacity_scale_changed_cb)
self._layer_mode_combo.connect('changed',
self._layer_mode_combo_changed_cb)
rootstack = docmodel.layer_stack
rootstack.layer_properties_changed += self._layer_propchange_cb
rootstack.current_path_updated += self._current_path_updated_cb
# Initial update
self.connect("show", self._show_cb)
def _show_cb(self, event):
self._processing_model_updates = True
self._update_all()
self._processing_model_updates = False
## Updates from the model
def _current_path_updated_cb(self, rootstack, layerpath):
"""Respond to the current layer changing in the doc-model"""
self._processing_model_updates = True
self._update_all()
self._processing_model_updates = False
def _layer_propchange_cb(self, rootstack, path, layer, changed):
if self._processing_model_updates:
logger.debug("Property change skipped: already processing "
"an update from the document model")
if layer is not rootstack.current:
return
self._processing_model_updates = True
if "mode" in changed:
self._update_layer_mode_combo()
if "opacity" in changed or "mode" in changed:
self._update_opacity_scale()
self._processing_model_updates = False
## Model update processing
def _update_all(self):
assert self._processing_model_updates
self._update_context_menu()
self._update_layer_mode_combo()
self._update_opacity_scale()
def _update_layer_mode_combo(self):
"""Updates the layer mode combo's value from the model"""
assert self._processing_model_updates
combo = self._layer_mode_combo
rootstack = self.app.doc.model.layer_stack
current = rootstack.current
if current is rootstack or not current:
combo.set_sensitive(False)
return
elif not combo.get_sensitive():
combo.set_sensitive(True)
active_iter = None
current_mode = current.mode
for row in combo.get_model():
mode = row[0]
if mode == current_mode:
active_iter = row.iter
row[2] = (mode in current.PERMITTED_MODES)
combo.set_active_iter(active_iter)
label, desc = lib.layer.MODE_STRINGS.get(current_mode)
template = self.LAYER_MODE_TOOLTIP_MARKUP_TEMPLATE
tooltip = template.format(
name = lib.xml.escape(label),
description = lib.xml.escape(desc),
)
combo.set_tooltip_markup(tooltip)
def _update_opacity_scale(self):
"""Updates the opacity scale from the model"""
assert self._processing_model_updates
rootstack = self.app.doc.model.layer_stack
layer = rootstack.current
scale = self._opacity_scale
opacity_is_adjustable = not (
layer is None
or layer is rootstack
or layer.mode == lib.layer.PASS_THROUGH_MODE
)
scale.set_sensitive(opacity_is_adjustable)
if not opacity_is_adjustable:
return
percentage = layer.opacity * 100
scale.set_value(percentage)
template = self.OPACITY_SCALE_TOOLTIP_TEXT_TEMPLATE
tooltip = template % (percentage,)
scale.set_tooltip_text(tooltip)
def _update_context_menu(self):
assert self._processing_model_updates
layer = self.app.doc.model.layer_stack.current
layer_class = layer.__class__
if layer_class is self._layer_specific_ui_class:
return
ui_manager = self.app.ui_manager
for old_mergeid in self._layer_specific_ui_mergeids:
ui_manager.remove_ui(old_mergeid)
self._layer_specific_ui_mergeids = []
new_ui_matches = []
for lclass, lui in LAYER_CLASS_UI:
if isinstance(layer, lclass):
new_ui_matches.append(lui)
for new_ui in new_ui_matches:
new_mergeid = ui_manager.add_ui_from_string(new_ui)
self._layer_specific_ui_mergeids.append(new_mergeid)
self._layer_specific_ui_class = layer_class
## Updates from the user
def _rename_current_layer_cb(self, view):
rename_action = self.app.find_action("RenameLayer")
rename_action.activate()
def _blink_current_layer_cb(self, view):
self.app.doc.layerblink_state.activate()
def _view_drag_began_cb(self, view):
self._treeview_in_drag = True
statusbar = self.app.statusbar
statusbar_cid = self._drag_statusbar_context_id
statusbar.remove_all(statusbar_cid)
statusbar.push(statusbar_cid, self.STATUSBAR_DRAG_MSG)
def _view_drag_ended_cb(self, view):
self._treeview_in_drag = False
statusbar = self.app.statusbar
statusbar_cid = self._drag_statusbar_context_id
statusbar.remove_all(statusbar_cid)
def _opacity_scale_changed_cb(self, *ignore):
if self._processing_model_updates:
return
opacity = self._opacity_scale.get_value() / 100.0
docmodel = self.app.doc.model
docmodel.set_current_layer_opacity(opacity)
self._treeview.scroll_to_current_layer()
def _layer_mode_combo_changed_cb(self, *ignored):
"""Propagate the user's choice of layer mode to the model"""
if self._processing_model_updates:
return
docmodel = self.app.doc.model
combo = self._layer_mode_combo
model = combo.get_model()
mode = model.get_value(combo.get_active_iter(), 0)
if docmodel.layer_stack.current.mode == mode:
return
label, desc = lib.layer.MODE_STRINGS.get(mode)
docmodel.set_current_layer_mode(mode)
## Utility methods
def _popup_context_menu(self, event=None):
"""Display the popup context menu"""
if event is None:
time = Gtk.get_current_event_time()
button = 0
else:
time = event.time
button = event.button
self._menu.popup(None, None, None, None, button, time)
def _popup_menu_cb(self, widget, event=None):
"""Handler for "popup-menu" GtkEvents, and the view's @event"""
self._popup_context_menu(event=event)
return True
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