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# This file is part of MyPaint.
# Copyright (C) 2011-2018 by the MyPaint Development Team
#
# 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.
"""Layout constants and helper functions for common widgets."""
from __future__ import division, print_function
import functools
from lib.gibindings import Gtk
from lib.gibindings import Gdk
# Exact icon sizes
ICON_SIZE_LARGE = Gtk.IconSize.LARGE_TOOLBAR # 24x24, the docs promise
ICON_SIZE_SMALL = Gtk.IconSize.SMALL_TOOLBAR # 16x16
# Spacing constants
SPACING_CRAMPED = 3 # for use in dockables only
SPACING_TIGHT = 2 * SPACING_CRAMPED
SPACING = 2 * SPACING_TIGHT
SPACING_LOOSE = 3*SPACING_TIGHT
def borderless_button(stock_id=None, icon_name=None, size=ICON_SIZE_SMALL,
tooltip=None, action=None):
"""Create a button styled to be borderless.
>>> borderless_button(icon_name="mypaint") # doctest: +ELLIPSIS
<Gtk.Button...>
"""
button = Gtk.Button()
if stock_id is not None:
image = Gtk.Image()
image.set_from_stock(stock_id, size)
set_margins(image, 0)
button.add(image)
elif icon_name is not None:
image = Gtk.Image()
image.set_from_icon_name(icon_name, size)
set_margins(image, 0)
button.add(image)
elif action is not None:
button.set_related_action(action)
if button.get_child() is not None:
button.remove(button.get_child())
img = action.create_icon(size)
img.set_padding(4, 4)
set_margins(img, 0)
button.add(img)
button.set_relief(Gtk.ReliefStyle.NONE)
button.set_can_default(False)
button.set_can_focus(False)
set_margins(button, 0)
if tooltip is not None:
button.set_tooltip_text(tooltip)
elif action is not None:
button.set_tooltip_text(action.get_tooltip())
cssprov = Gtk.CssProvider()
cssprov.load_from_data(b"GtkButton { padding: 0px; margin: 0px; }")
style = button.get_style_context()
style.add_provider(cssprov, Gtk.STYLE_PROVIDER_PRIORITY_APPLICATION)
button.set_has_tooltip(tooltip is not None)
return button
def set_margins(widget, all_=0, tb=None, lr=None,
t=None, b=None, l=None, r=None): # noqa: E741
"""Set margins compatibly on a widget.
>>> w = Gtk.Label(label="i have wide margins")
>>> set_margins(w, 42)
Works around Gtk's deprecation of gtk_widget_set_margin_{left,right}
in version 3.12.
"""
top = bot = left = right = 0
if all_ is not None:
top = bot = left = right = int(all_)
if tb is not None:
top = bot = int(tb)
if lr is not None:
left = right = int(lr)
if t is not None:
top = int(t)
if b is not None:
bot = int(b)
if l is not None:
left = int(l)
if r is not None:
right = int(r)
try:
widget.set_margin_start(left)
widget.set_margin_end(right)
except AttributeError:
widget.set_margin_left(left)
widget.set_margin_right(right)
widget.set_margin_top(top)
widget.set_margin_bottom(bot)
def inline_toolbar(app, tool_defs):
"""Builds a styled inline toolbar"""
bar = Gtk.Toolbar(
show_arrow = False,
icon_size = ICON_SIZE_SMALL,
)
bar.set_style(Gtk.ToolbarStyle.ICONS)
styles = bar.get_style_context()
styles.add_class(Gtk.STYLE_CLASS_INLINE_TOOLBAR)
for action_name, override_icon in tool_defs:
action = app.find_action(action_name)
toolitem = Gtk.ToolButton()
toolitem.set_related_action(action)
if override_icon:
toolitem.set_icon_name(override_icon)
bar.insert(toolitem, -1)
bar.child_set_property(toolitem, "expand", True)
bar.child_set_property(toolitem, "homogeneous", True)
bar.set_vexpand(False)
bar.set_hexpand(True)
return bar
class MenuButtonToolItem (Gtk.ToolItem):
"""ToolItem which contains a Gtk.MenuButton"""
def __init__(self):
Gtk.ToolItem.__init__(self)
menubtn = Gtk.MenuButton()
self.add(menubtn)
self.connect("realize", self._realize_cb)
menubtn.set_always_show_image(True)
menubtn.set_relief(Gtk.ReliefStyle.NONE)
self._menubutton = menubtn
self.menu = None #: Populate with the menu to show before realize
def _realize_cb(self, widget):
action = self.get_related_action()
icon_name = action.get_icon_name()
image = Gtk.Image.new_from_icon_name(
icon_name,
get_toolbar_icon_size(),
)
self._menubutton.set_image(image)
if self.menu:
self._menubutton.set_popup(self.menu)
def get_toolbar_icon_size():
from gui.application import get_app
app = get_app()
size = str(app.preferences.get("ui.toolbar_icon_size", "large"))
if size.lower() == 'small':
return ICON_SIZE_SMALL
else:
return ICON_SIZE_LARGE
def with_wait_cursor(func):
"""python decorator that adds a wait cursor around a function"""
@functools.wraps(func)
def wrapper(self, *args, **kwargs):
wait_cursor = Gdk.Cursor.new(Gdk.CursorType.WATCH)
toplevels = Gtk.Window.list_toplevels()
toplevels = [t for t in toplevels if t.get_window() is not None]
for toplevel in toplevels:
toplevel_win = toplevel.get_window()
if toplevel_win is not None:
toplevel_win.set_cursor(wait_cursor)
toplevel.set_sensitive(False)
try:
return func(self, *args, **kwargs)
# gtk main loop may be called in here...
finally:
for toplevel in toplevels:
toplevel.set_sensitive(True)
# ... which is why we need this check
toplevel_win = toplevel.get_window()
if toplevel_win is not None:
toplevel_win.set_cursor(None)
return wrapper
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