/usr/share/mypaint/gui/footer.py is in mypaint 1.2.0-1.
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) 2015 by Andrew Chadwick <a.t.chadwick@gmail.com>
#
# 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.
"""Footer widget behaviour."""
## Imports
import math
import logging
logger = logging.getLogger(__name__)
import cairo
from gi.repository import Gtk
from gi.repository import Gdk
from gi.repository import GdkPixbuf
import lib.xml
from lib.gettext import C_
from gettext import gettext as _
## Class definitions
class BrushIndicatorPresenter (object):
"""Behaviour for a clickable footer brush indicator
This presenter's view is a DrawingArea instance
which is used to display the current brush's preview image.
Its model is the BrushManager instance belonging to the main app.
Both the view and the model
must be set after construction
and before or during realization.
When the view DrawingArea is clicked,
a QuickBrushChooser is popped up near it,
allowing the user to change the current brush.
The code assumes that
a single instance of the view DrawingArea
is packed into the lower right corner
(lower left, for rtl locales)
of the main drawing window's footer bar.
48px is a good width for the view widget.
If the preview is too tall to display fully,
it is drawn truncated with a cute gradient effect.
The user can hover the pointer to show a tooltip
with the full preview image.
"""
_TOOLTIP_ICON_SIZE = 48
_EDGE_HIGHLIGHT_RGBA = (1, 1, 1, 0.25)
_OUTLINE_RGBA = (0, 0, 0, 0.4)
_DEFAULT_BRUSH_DISPLAY_NAME = _("Unknown Brush")
# FIXME: Use brushmanager.py's source string while we are in string
# FIXME: freeze.
## Initialization
def __init__(self):
"""Basic initialization"""
super(BrushIndicatorPresenter, self).__init__()
self._brush_preview = None
self._brush_name = self._DEFAULT_BRUSH_DISPLAY_NAME
self._brush_desc = None
self._drawing_area = None
self._brush_manager = None
self._chooser = None
self._click_button = None
def set_drawing_area(self, da):
"""Set the view DrawingArea.
:param Gtk.DrawingArea da: the model BrushManager
The view should be set before or during its realization.
"""
self._drawing_area = da
da.set_has_window(True)
da.add_events(
Gdk.EventMask.BUTTON_PRESS_MASK |
Gdk.EventMask.BUTTON_RELEASE_MASK
)
da.connect("draw", self._draw_cb)
da.connect("query-tooltip", self._query_tooltip_cb)
da.set_property("has-tooltip", True)
da.connect("button-press-event", self._button_press_cb)
da.connect("button-release-event", self._button_release_cb)
def set_brush_manager(self, bm):
"""Set the model BrushManager.
:param gui.brushmanager.BrushManager bm: the model BrushManager
"""
self._brush_manager = bm
bm.brush_selected += self._brush_selected_cb
def set_chooser(self, chooser):
"""Set an optional popup, to be shown when clicked.
:param gui.quickchoice.BrushChooserPopup chooser: popup to show
"""
self._chooser = chooser
## View event handlers
def _draw_cb(self, da, cr):
"""Paint a preview of the current brush to the view."""
if not self._brush_preview:
cr.set_source_rgb(1, 0, 1)
cr.paint()
return
aw = da.get_allocated_width()
ah = da.get_allocated_height()
# Work in a temporary group so that
# the result can be masked with a gradient later.
cr.push_group()
# Paint a shadow line around the edge of
# where the the brush preview will go.
# There's an additional top border of one pixel
# for alignment with the color preview widget
# in the other corner.
cr.rectangle(1.5, 2.5, aw-3, ah)
cr.set_line_join(cairo.LINE_JOIN_ROUND)
cr.set_source_rgba(*self._OUTLINE_RGBA)
cr.set_line_width(3)
cr.stroke()
# Scale and align the brush preview in its own saved context
cr.save()
# Clip rectangle for the bit in the middle of the shadow.
# Note that the bottom edge isn't shadowed.
cr.rectangle(1, 2, aw-2, ah)
cr.clip()
# Scale and align the preview to the top of that clip rect.
preview = self._brush_preview
pw = preview.get_width()
ph = preview.get_height()
area_size = float(max(aw, ah)) - 2
preview_size = float(max(pw, ph))
x = math.floor(-pw/2.0)
y = 0
cr.translate(aw/2.0, 2)
scale = area_size / preview_size
cr.scale(scale, scale)
Gdk.cairo_set_source_pixbuf(cr, preview, x, y)
cr.paint()
cr.restore()
# Finally a highlight around the edge in the house style
# Note that the bottom edge isn't highlighted.
cr.rectangle(1.5, 2.5, aw-3, ah)
cr.set_line_width(1)
cr.set_source_rgba(*self._EDGE_HIGHLIGHT_RGBA)
cr.stroke()
# Paint the group within a gradient mask
cr.pop_group_to_source()
mask = cairo.LinearGradient(0, 0, 0, ah)
mask.add_color_stop_rgba(0.0, 1, 1, 1, 1.0)
mask.add_color_stop_rgba(0.8, 1, 1, 1, 1.0)
mask.add_color_stop_rgba(0.95, 1, 1, 1, 0.5)
mask.add_color_stop_rgba(1.0, 1, 1, 1, 0.1)
cr.mask(mask)
def _query_tooltip_cb(self, da, x, y, keyboard_mode, tooltip):
s = self._TOOLTIP_ICON_SIZE
scaled_pixbuf = self._get_scaled_pixbuf(s)
tooltip.set_icon(scaled_pixbuf)
brush_name = self._brush_name
if not brush_name:
brush_name = self._DEFAULT_BRUSH_DISPLAY_NAME
# Rare cases, see https://github.com/mypaint/mypaint/issues/402.
# Probably just after init.
template_params = {"brush_name": lib.xml.escape(brush_name)}
markup_template = C_(
"current brush indicator: tooltip (no-description case)",
u"<b>{brush_name}</b>",
)
if self._brush_desc:
markup_template = C_(
"current brush indicator: tooltip (description case)",
u"<b>{brush_name}</b>\n{brush_desc}",
)
template_params["brush_desc"] = lib.xml.escape(self._brush_desc)
markup = markup_template.format(**template_params)
tooltip.set_markup(markup)
# TODO: summarize changes?
return True
def _button_press_cb(self, widget, event):
if not self._chooser:
return False
if event.button != 1:
return False
if event.type != Gdk.EventType.BUTTON_PRESS:
return False
self._click_button = event.button
return True
def _button_release_cb(self, widget, event):
if event.button != self._click_button:
return False
self._click_button = None
chooser = self._chooser
if not chooser:
return
if chooser.get_visible():
chooser.hide()
else:
chooser.popup(
widget = self._drawing_area,
above = True,
textwards = False,
event = event,
)
return True
## Model event handlers
def _brush_selected_cb(self, bm, brush, brushinfo):
if brush is None:
return
self._brush_preview = brush.preview.copy()
self._brush_name = brush.get_display_name()
self._brush_desc = brush.description
self._drawing_area.queue_draw()
## Utility methods
def _get_scaled_pixbuf(self, size):
if self._brush_preview is None:
pixbuf = GdkPixbuf.Pixbuf.new(
GdkPixbuf.Colorspace.RGB,
False, 8, size, size,
)
pixbuf.fill(0x00ff00ff)
return pixbuf
else:
interp = GdkPixbuf.InterpType.BILINEAR
return self._brush_preview.scale_simple(size, size, interp)
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