/usr/share/mypaint/gui/functionwindow.py is in mypaint 1.0.0-1.
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) 2007 by Martin Renold <martinxyz@gmx.ch>
#
# 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.
"""
Widgets to manipulate the input dependency of a single brush setting.
"""
from gettext import gettext as _
import gtk
from brushlib import brushsettings
import windowing
from curve import CurveWidget
class BrushInputsWidget(gtk.VBox):
def __init__(self, app):
gtk.VBox.__init__(self)
self.app = app
self.byinputwidgets = {}
self.setting = None
self.init_ui()
def init_ui(self):
scroll = gtk.ScrolledWindow()
scroll.set_policy(gtk.POLICY_NEVER, gtk.POLICY_ALWAYS)
self.pack_start(scroll)
vbox = gtk.VBox()
scroll.add_with_viewport(vbox)
l = gtk.Label()
l.set_markup(_('Base Value'))
l.set_alignment(0.0, 0.0)
l.xpad = 5
vbox.pack_start(l, expand=False)
hbox = gtk.HBox()
vbox.pack_start(hbox, expand=False)
scale = self.base_value_hscale = gtk.HScale()
scale.set_digits(2)
scale.set_draw_value(True)
scale.set_value_pos(gtk.POS_LEFT)
hbox.pack_start(scale, expand=True)
b = self.default_value_button = gtk.Button()
b.connect('clicked', self.set_default_value_cb)
hbox.pack_start(b, expand=False)
vbox.pack_start(gtk.HSeparator(), expand=False)
for i in brushsettings.inputs:
w = ByInputWidget(self.app, i)
self.byinputwidgets[i.name] = w
vbox.pack_start(w, expand=False)
vbox.pack_start(gtk.HSeparator(), expand=False)
def set_brushsetting(self, setting, adj):
self.setting = setting
self.base_value_hscale.set_adjustment(adj)
b = self.default_value_button
b.set_label("%.1f" % setting.default)
for widget in self.byinputwidgets.itervalues():
widget.set_brushsetting(setting)
def set_default_value_cb(self, widget):
self.app.brush.set_base_value(self.setting.cname, self.setting.default)
def points_equal(points_a, points_b):
if len(points_a) != len(points_b):
return False
for a, b in zip(points_a, points_b):
for v1, v2 in zip(a, b):
if abs(v1-v2) > 0.0001:
return False
return True
class ByInputWidget(gtk.VBox):
"the gui elements that change the response to one input"
def __init__(self, app, input):
gtk.VBox.__init__(self)
self.set_spacing(5)
self.app = app
self.input = input
self.setting = None
self.app.brush.observers.append(self.brush_modified_cb)
self.app.brushmanager.selected_brush_observers.append(self.brush_selected_cb)
self.points = None
self.disable_scale_changes_cb = True
lower = -20.0
upper = +20.0
if input.hard_min is not None: lower = input.hard_min
if input.hard_max is not None: upper = input.hard_max
self.xmin_adj = gtk.Adjustment(value=input.soft_min, lower=lower, upper=upper-0.1, step_incr=0.01, page_incr=0.1)
self.xmax_adj = gtk.Adjustment(value=input.soft_max, lower=lower+0.1, upper=upper, step_incr=0.01, page_incr=0.1)
self.scale_y_adj = gtk.Adjustment(value=1.0/4.0, lower=-1.0, upper=1.0, step_incr=0.01, page_incr=0.1)
self.xmin_adj.connect('value-changed', self.scale_changes_cb)
self.xmax_adj.connect('value-changed', self.scale_changes_cb)
self.scale_y_adj.connect('value-changed', self.scale_changes_cb)
l = gtk.Label()
l.set_markup(input.dname)
l.set_alignment(0.0, 0.0)
l.set_tooltip_text(input.tooltip)
self.pack_start(l, expand=False)
hbox = gtk.HBox()
self.pack_start(hbox, expand=False)
#hbox.pack_start(gtk.Label('by ' + input.name), expand=False)
scale = self.base_value_hscale = gtk.HScale(self.scale_y_adj)
scale.set_digits(2)
scale.set_draw_value(True)
scale.set_value_pos(gtk.POS_LEFT)
hbox.pack_start(scale, expand=True)
b = gtk.Button("0.0")
b.connect('clicked', self.set_fixed_value_clicked_cb, self.scale_y_adj, 0.0)
hbox.pack_start(b, expand=False)
t = gtk.Table(4, 4)
c = self.curve_widget = CurveWidget(self.curvewidget_points_modified_cb)
t.attach(c, 0, 3, 0, 3, gtk.EXPAND | gtk.FILL, gtk.EXPAND | gtk.FILL, 5, 0)
l1 = gtk.SpinButton(self.scale_y_adj); l1.set_digits(2)
l2 = gtk.Label('+0.0')
l3 = gtk.Label()
def update_negative_scale(*junk):
l3.set_text('%+.2f' % -self.scale_y_adj.get_value())
self.scale_y_adj.connect('value-changed', update_negative_scale)
update_negative_scale()
t.attach(l1, 3, 4, 0, 1, 0, 0, 5, 0)
t.attach(l2, 3, 4, 1, 2, 0, gtk.EXPAND, 5, 0)
t.attach(l3, 3, 4, 2, 3, 0, 0, 5, 0)
l4 = gtk.SpinButton(self.xmin_adj); l4.set_digits(2)
l5 = gtk.Label('')
l6 = gtk.SpinButton(self.xmax_adj); l6.set_digits(2)
t.attach(l4, 0, 1, 3, 4, 0, 0, 5, 0)
t.attach(l5, 1, 2, 3, 4, gtk.EXPAND, 0, 5, 0)
t.attach(l6, 2, 3, 3, 4, 0, 0, 5, 0)
expander = self.expander = gtk.Expander(label=_('Details'))
expander.add(t)
expander.set_expanded(False)
self.pack_start(expander, expand=False)
self.disable_scale_changes_cb = False
def set_brushsetting(self, setting):
self.setting = setting
self.reset_gui()
def brush_selected_cb(self, *junk):
if not self.setting:
return
self.reset_gui()
def set_fixed_value_clicked_cb(self, widget, adj, value):
adj.set_value(value)
def scale_changes_cb(self, widget):
if self.disable_scale_changes_cb:
return
# MVC: this is part of the controller
# 1. verify and constrain the adjustment changes
scale_y = self.scale_y_adj.get_value()
xmax = self.xmax_adj.get_value()
xmin = self.xmin_adj.get_value()
if xmax <= xmin:
# change the other one
if widget is self.xmax_adj:
self.xmin_adj.set_value(xmax - 0.1)
elif widget is self.xmin_adj:
self.xmax_adj.set_value(xmin + 0.1)
else:
assert False
return # the adjustment change causes another call of this function
assert xmax > xmin
# 2. interpret the points displayed in the curvewidget
# according to the new scale (update the brush)
self.curvewidget_points_modified_cb(None)
def get_brushpoints_from_curvewidget(self):
scale_y = self.scale_y_adj.get_value()
if not scale_y:
return []
brush_points = [self.point_widget2real(p) for p in self.curve_widget.points]
nonzero = [True for x, y in brush_points if y != 0]
if not nonzero:
return []
return brush_points
def curvewidget_points_modified_cb(self, widget):
# MVC: this is part of the controller
# update the brush with the points from curve_widget
points = self.get_brushpoints_from_curvewidget()
self.app.brush.set_points(self.setting.cname, self.input.name, points)
def point_real2widget(self, (x, y)):
scale_y = self.scale_y_adj.get_value()
xmax = self.xmax_adj.get_value()
xmin = self.xmin_adj.get_value()
scale_x = xmax - xmin
assert scale_x
if scale_y == 0:
y = None
else:
y = -(y/scale_y/2.0)+0.5
x = (x-xmin)/scale_x
return (x, y)
def point_widget2real(self, (x, y)):
scale_y = self.scale_y_adj.get_value()
xmax = self.xmax_adj.get_value()
xmin = self.xmin_adj.get_value()
scale_x = xmax - xmin
x = xmin + (x * scale_x)
y = (0.5-y) * 2.0 * scale_y
return (x, y)
def reset_gui(self):
"update scales (adjustments) to fit the brush curve into view"
# MVC: this is part of the view
brush_points = self.app.brush.get_points(self.setting.cname, self.input.name)
brush_points_zero = [(self.input.soft_min, 0.0), (self.input.soft_max, 0.0)]
if not brush_points:
brush_points = brush_points_zero
# 1. update the scale
xmin, xmax = brush_points[0][0], brush_points[-1][0]
assert xmax > xmin
assert max([x for x, y in brush_points]) == xmax
assert min([x for x, y in brush_points]) == xmin
y_min = min([y for x, y in brush_points])
y_max = max([y for x, y in brush_points])
scale_y = max(abs(y_min), abs(y_max))
# choose between scale_y and -scale_y (arbitrary)
if brush_points[0][1] > brush_points[-1][1]:
scale_y = -scale_y
if not scale_y:
brush_points = brush_points_zero
# if xmin/xmax were non-default, reset them
xmin = self.input.soft_min
xmax = self.input.soft_max
self.disable_scale_changes_cb = True
# set adjustment limits imposed by brush setting
diff = self.setting.max - self.setting.min
self.scale_y_adj.set_upper(+diff)
self.scale_y_adj.set_lower(-diff)
self.scale_y_adj.set_value(scale_y)
# set adjustment values such that all points are visible
self.xmax_adj.set_value(xmax)
self.xmin_adj.set_value(xmin)
self.disable_scale_changes_cb = False
# 2. calculate the default curve (the one we display if there is no curve)
curve_points_zero = [self.point_real2widget(p) for p in brush_points_zero]
# widget x coordinate of the "normal" input value
x_normal = self.get_x_normal()
y0 = -1.0
y1 = +1.0
# the default line should go through zero at x_normal
# change one of the border points to achieve this
if x_normal >= 0.0 and x_normal <= 1.0:
if x_normal < 0.5:
y0 = -0.5/(x_normal-1.0)
y1 = 0.0
else:
y0 = 1.0
y1 = -0.5/x_normal + 1.0
(x0, junk0), (x1, junk1) = curve_points_zero
curve_points_zero = [(x0, y0), (x1, y1)]
# 3. display the curve
if scale_y:
curve_points = [self.point_real2widget(p) for p in brush_points]
else:
curve_points = curve_points_zero
assert len(curve_points) >= 2
self.curve_widget.points = curve_points
self.curve_widget.queue_draw()
self.update_graypoint()
# 4. reset the expander
interesting = not points_equal(curve_points, curve_points_zero)
self.expander.set_expanded(interesting)
def get_x_normal(self):
"returns the widget x coordinate of the 'normal' value of the input"
return self.point_real2widget((self.input.normal, 0.0))[0]
def update_graypoint(self):
self.curve_widget.graypoint = (self.get_x_normal(), 0.5)
self.curve_widget.queue_draw()
def brush_modified_cb(self, settings):
"update gui when the brush has been modified (by this widget or externally)"
if not self.setting:
return
if self.setting.cname not in settings:
return
# check whether we really need to update anything
points_old = self.get_brushpoints_from_curvewidget()
points_new = self.app.brush.get_points(self.setting.cname, self.input.name)
# try not to destroy changes that the user made to the widget
# (not all gui states are stored inside the brush)
if not points_equal(points_old, points_new):
self.reset_gui()
self.update_graypoint()
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