1# This file is part of MyPaint.
2# Copyright (C) 2014 by Andrew Chadwick <a.t.chadwick@gmail.com>
3#
4# This program is free software; you can redistribute it and/or modify
5# it under the terms of the GNU General Public License as published by
6# the Free Software Foundation; either version 2 of the License, or
7# (at your option) any later version.
8
9"""Graphical style constants for on-canvas editable objects
10
11This covers things like the frame outlines, or the axis of symmetry.
12Using a consistent set of colors, widths, and sizes helps provide
13a unified graphical experience.
14
15See also: gui.drawutils
16
17"""
18
19from __future__ import division, print_function
20
21from lib.color import HCYColor, RGBColor
22
23
24## Alpha checks (chequerboard pattern)
25
26ALPHA_CHECK_SIZE = 16
27ALPHA_CHECK_COLOR_1 = (0.45, 0.45, 0.45)
28ALPHA_CHECK_COLOR_2 = (0.50, 0.50, 0.50)
29
30
31## Floating action buttons (rendered on the canvas)
32
33FLOATING_BUTTON_ICON_SIZE = 16
34FLOATING_BUTTON_RADIUS = 16
35
36
37## Draggable line and handle sizes
38
39DRAGGABLE_POINT_HANDLE_SIZE = 4
40DRAGGABLE_EDGE_WIDTH = 2
41
42
43## Paint-chip style
44
45PAINT_CHIP_HIGHLIGHT_HCY_Y_MULT = 1.1
46PAINT_CHIP_HIGHLIGHT_HCY_C_MULT = 1.1
47PAINT_CHIP_SHADOW_HCY_Y_MULT = 0.666
48PAINT_CHIP_SHADOW_HCY_C_MULT = 0.5
49
50
51## Drop shadow layout and weight
52
53DROP_SHADOW_ALPHA = 0.5
54DROP_SHADOW_BLUR = 2.0
55DROP_SHADOW_X_OFFSET = 0.0
56DROP_SHADOW_Y_OFFSET = 0.5
57# These are only used for otherwise flat editable or draggable objects.
58
59
60## Colors for additional on-canvas information
61
62# Transient on-canvas information, intended to be read quickly.
63# Used for fading textual info or vanishing positional markers.
64# Need to be high-contrast, and clear. Black and white is good.
65
66TRANSIENT_INFO_BG_RGBA = (0, 0, 0, 0.666)  #: Transient text bg / outline
67TRANSIENT_INFO_RGBA = (1, 1, 1, 1)  #: Transient text / marker
68
69
70# Editable on-screen items.
71# Used for editable handles on things like the document frame,
72# when it's being edited.
73# It's a good idea to use this and a user-tuneable alpha if the item
74# is to be shown on screen permanently, in modes other than the object's
75# own edit mode.
76
77EDITABLE_ITEM_COLOR = RGBColor.new_from_hex_str("#ECF0F1")
78
79
80# Active/dragging state for editable items.
81
82ACTIVE_ITEM_COLOR = RGBColor.new_from_hex_str("#F1C40F")
83
84
85# Prelight color (for complex modes, when there needs to be a distinction)
86
87PRELIT_ITEM_COLOR = tuple(
88        ACTIVE_ITEM_COLOR.interpolate(EDITABLE_ITEM_COLOR, 3)
89    )[1]
90
91