Kstars

schememanager.cpp
1/*
2 This file is a part of digiKam project
3 http://www.digikam.org
4
5 SPDX-FileCopyrightText: 2006-2018 Gilles Caulier <caulier dot gilles at gmail dot com>
6 SPDX-FileCopyrightText: 2007 Matthew Woehlke <mw_triad at users dot sourceforge dot net>
7
8 SPDX-License-Identifier: GPL-2.0-or-later
9*/
10
11#include "schememanager.h"
12
13#include <kconfig.h>
14#include <kconfiggroup.h>
15
16#include <QWidget>
17#include <QPainter>
18
19#include <cmath>
20
21class HCYColorSpace
22{
23public:
24
25 explicit HCYColorSpace(const QColor&);
26 explicit HCYColorSpace(qreal h_, qreal c_, qreal y_, qreal a_ = 1.0);
27
28 QColor qColor() const;
29
30 static qreal luma(const QColor &);
31
32public:
33
34 qreal h;
35 qreal c;
36 qreal y;
37 qreal a;
38
39private:
40
41 static qreal gamma(qreal);
42 static qreal igamma(qreal);
43 static qreal lumag(qreal, qreal, qreal);
44};
45
46// ------------------------------------------------------------------------------
47
48namespace ColorTools
49{
50
51static inline qreal wrap(qreal a, qreal d = 1.0)
52{
53 qreal r = fmod(a, d);
54
55 return (r < 0.0 ? d + r : (r > 0.0 ? r : 0.0));
56}
57
58/*
59 normalize: like qBound(a, 0.0, 1.0) but without needing the args and with
60 "safer" behavior on NaN (isnan(a) -> return 0.0)
61*/
62static inline qreal normalize(qreal a)
63{
64 return (a < 1.0 ? (a > 0.0 ? a : 0.0) : 1.0);
65}
66
67static inline qreal mixQreal(qreal a, qreal b, qreal bias)
68{
69 return (a + (b - a) * bias);
70}
71
72/**
73 * Calculate the luma of a color. Luma is weighted sum of gamma-adjusted
74 * R'G'B' components of a color. The result is similar to qGray. The range
75 * is from 0.0 (black) to 1.0 (white).
76 *
77 */
78qreal luma(const QColor& color)
79{
80 return HCYColorSpace::luma(color);
81}
82
83/**
84 * Calculate hue, chroma and luma of a color in one call.
85 */
86void getHcy(const QColor& color, qreal* h, qreal* c, qreal* y, qreal* a = 0)
87{
88 if (!c || !h || !y)
89 {
90 return;
91 }
92
93 HCYColorSpace khcy(color);
94 *c = khcy.c;
95 *h = khcy.h;
96 *y = khcy.y;
97
98 if (a)
99 {
100 *a = khcy.a;
101 }
102}
103
104/**
105 * Calculate the contrast ratio between two colors, according to the
106 * W3C/WCAG2.0 algorithm, (Lmax + 0.05)/(Lmin + 0.05), where Lmax and Lmin
107 * are the luma values of the lighter color and the darker color,
108 * respectively.
109 *
110 * A contrast ration of 5:1 (result == 5.0) is the minimum for "normal"
111 * text to be considered readable (large text can go as low as 3:1). The
112 * ratio ranges from 1:1 (result == 1.0) to 21:1 (result == 21.0).
113 */
114static qreal contrastRatioForLuma(qreal y1, qreal y2)
115{
116 if (y1 > y2)
117 {
118 return (y1 + 0.05) / (y2 + 0.05);
119 }
120
121 return (y2 + 0.05) / (y1 + 0.05);
122}
123
124qreal contrastRatio(const QColor& c1, const QColor& c2)
125{
126 return contrastRatioForLuma(luma(c1), luma(c2));
127}
128
129/**
130 * Adjust the luma of a color by changing its distance from white.
131 */
132QColor lighten(const QColor& color, qreal ky = 0.5, qreal kc = 1.0)
133{
134 HCYColorSpace c(color);
135 c.y = 1.0 - ColorTools::normalize((1.0 - c.y) * (1.0 - ky));
136 c.c = 1.0 - ColorTools::normalize((1.0 - c.c) * kc);
137
138 return c.qColor();
139}
140
141/**
142 * Adjust the luma of a color by changing its distance from black.
143 */
144QColor darken(const QColor& color, qreal ky = 0.5, qreal kc = 1.0)
145{
146 HCYColorSpace c(color);
147 c.y = ColorTools::normalize(c.y * (1.0 - ky));
148 c.c = ColorTools::normalize(c.c * kc);
149
150 return c.qColor();
151}
152
153/**
154 * Adjust the luma and chroma components of a color. The amount is added
155 * to the corresponding component.
156 */
157QColor shade(const QColor& color, qreal ky, qreal kc = 0.0)
158{
159 HCYColorSpace c(color);
160 c.y = ColorTools::normalize(c.y + ky);
161 c.c = ColorTools::normalize(c.c + kc);
162
163 return c.qColor();
164}
165
166/**
167 * Blend two colors into a new color by linear combination.
168 */
169QColor mix(const QColor& c1, const QColor& c2, qreal bias)
170{
171 if (bias <= 0.0)
172 {
173 return c1;
174 }
175
176 if (bias >= 1.0)
177 {
178 return c2;
179 }
180
181 if (qIsNaN(bias))
182 {
183 return c1;
184 }
185
186 qreal r = mixQreal(c1.redF(), c2.redF(), bias);
187 qreal g = mixQreal(c1.greenF(), c2.greenF(), bias);
188 qreal b = mixQreal(c1.blueF(), c2.blueF(), bias);
189 qreal a = mixQreal(c1.alphaF(), c2.alphaF(), bias);
190
191 return QColor::fromRgbF(r, g, b, a);
192}
193
194static QColor tintHelper(const QColor& base, qreal baseLuma, const QColor& color, qreal amount)
195{
196 HCYColorSpace result(mix(base, color, pow(amount, 0.3)));
197 result.y = mixQreal(baseLuma, result.y, amount);
198
199 return result.qColor();
200}
201
202/**
203 * Create a new color by tinting one color with another. This function is
204 * meant for creating additional colors withings the same class (background,
205 * foreground) from colors in a different class. Therefore when @p amount
206 * is low, the luma of @p base is mostly preserved, while the hue and
207 * chroma of @p color is mostly inherited.
208 *
209 * @param base color to be tinted
210 * @param color color with which to tint
211 * @param amount how strongly to tint the base; 0.0 gives @p base,
212 * 1.0 gives @p color
213 */
214QColor tint(const QColor& base, const QColor& color, qreal amount = 0.3)
215{
216 if (amount <= 0.0)
217 {
218 return base;
219 }
220
221 if (amount >= 1.0)
222 {
223 return color;
224 }
225
226 if (qIsNaN(amount))
227 {
228 return base;
229 }
230
231 qreal baseLuma = luma(base); //cache value because luma call is expensive
232 double ri = contrastRatioForLuma(baseLuma, luma(color));
233 double rg = 1.0 + ((ri + 1.0) * amount * amount * amount);
234 double u = 1.0, l = 0.0;
235 QColor result;
236
237 for (int i = 12; i; --i)
238 {
239 double a = 0.5 * (l + u);
240 result = tintHelper(base, baseLuma, color, a);
241 double ra = contrastRatioForLuma(baseLuma, luma(result));
242
243 if (ra > rg)
244 {
245 u = a;
246 }
247 else
248 {
249 l = a;
250 }
251 }
252
253 return result;
254}
255
256/**
257 * Blend two colors into a new color by painting the second color over the
258 * first using the specified composition mode.
259 *
260 * @param base the base color (alpha channel is ignored).
261 * @param paint the color to be overlayed onto the base color.
262 * @param comp the CompositionMode used to do the blending.
263 */
264QColor overlayColors(const QColor& base, const QColor& paint,
265 QPainter::CompositionMode comp)
266{
267 // This isn't the fastest way, but should be "fast enough".
268 // It's also the only safe way to use QPainter::CompositionMode
269 QImage img(1, 1, QImage::Format_ARGB32_Premultiplied);
270 QPainter p(&img);
271 QColor start = base;
272 start.setAlpha(255); // opaque
273 p.fillRect(0, 0, 1, 1, start);
274 p.setCompositionMode(comp);
275 p.fillRect(0, 0, 1, 1, paint);
276 p.end();
277
278 return img.pixel(0, 0);
279}
280
281} // namespace ColorTools
282
283// ------------------------------------------------------------------------------
284
285#define HCY_REC 709 // use 709 for now
286#if HCY_REC == 601
287static const qreal yc[3] = {0.299, 0.587, 0.114 };
288#elif HCY_REC == 709
289static const qreal yc[3] = {0.2126, 0.7152, 0.0722 };
290#else // use Qt values
291static const qreal yc[3] = {0.34375, 0.5, 0.15625};
292#endif
293
294qreal HCYColorSpace::gamma(qreal n)
295{
296 return pow(ColorTools::normalize(n), 2.2);
297}
298
299qreal HCYColorSpace::igamma(qreal n)
300{
301 return pow(ColorTools::normalize(n), 1.0 / 2.2);
302}
303
304qreal HCYColorSpace::lumag(qreal r, qreal g, qreal b)
305{
306 return r * yc[0] + g * yc[1] + b * yc[2];
307}
308
309HCYColorSpace::HCYColorSpace(qreal h_, qreal c_, qreal y_, qreal a_)
310{
311 h = h_;
312 c = c_;
313 y = y_;
314 a = a_;
315}
316
317HCYColorSpace::HCYColorSpace(const QColor& color)
318{
319 qreal r = gamma(color.redF());
320 qreal g = gamma(color.greenF());
321 qreal b = gamma(color.blueF());
322 a = color.alphaF();
323
324 // luma component
325 y = lumag(r, g, b);
326
327 // hue component
328 qreal p = qMax(qMax(r, g), b);
329 qreal n = qMin(qMin(r, g), b);
330 qreal d = 6.0 * (p - n);
331
332 if (n == p)
333 {
334 h = 0.0;
335 }
336 else if (r == p)
337 {
338 h = ((g - b) / d);
339 }
340 else if (g == p)
341 {
342 h = ((b - r) / d) + (1.0 / 3.0);
343 }
344 else
345 {
346 h = ((r - g) / d) + (2.0 / 3.0);
347 }
348
349 // chroma component
350 if (r == g && g == b)
351 {
352 c = 0.0;
353 }
354 else
355 {
356 c = qMax((y - n) / y, (p - y) / (1 - y));
357 }
358}
359
360QColor HCYColorSpace::qColor() const
361{
362 // start with sane component values
363 qreal _h = ColorTools::wrap(h);
364 qreal _c = ColorTools::normalize(c);
365 qreal _y = ColorTools::normalize(y);
366
367 // calculate some needed variables
368 qreal _hs = _h * 6.0, th, tm;
369
370 if (_hs < 1.0)
371 {
372 th = _hs;
373 tm = yc[0] + yc[1] * th;
374 }
375 else if (_hs < 2.0)
376 {
377 th = 2.0 - _hs;
378 tm = yc[1] + yc[0] * th;
379 }
380 else if (_hs < 3.0)
381 {
382 th = _hs - 2.0;
383 tm = yc[1] + yc[2] * th;
384 }
385 else if (_hs < 4.0)
386 {
387 th = 4.0 - _hs;
388 tm = yc[2] + yc[1] * th;
389 }
390 else if (_hs < 5.0)
391 {
392 th = _hs - 4.0;
393 tm = yc[2] + yc[0] * th;
394 }
395 else
396 {
397 th = 6.0 - _hs;
398 tm = yc[0] + yc[2] * th;
399 }
400
401 // calculate RGB channels in sorted order
402 qreal tn, to, tp;
403
404 if (tm >= _y)
405 {
406 tp = _y + _y * _c * (1.0 - tm) / tm;
407 to = _y + _y * _c * (th - tm) / tm;
408 tn = _y - (_y * _c);
409 }
410 else
411 {
412 tp = _y + (1.0 - _y) * _c;
413 to = _y + (1.0 - _y) * _c * (th - tm) / (1.0 - tm);
414 tn = _y - (1.0 - _y) * _c * tm / (1.0 - tm);
415 }
416
417 // return RGB channels in appropriate order
418 if (_hs < 1.0)
419 {
420 return QColor::fromRgbF(igamma(tp), igamma(to), igamma(tn), a);
421 }
422 else if (_hs < 2.0)
423 {
424 return QColor::fromRgbF(igamma(to), igamma(tp), igamma(tn), a);
425 }
426 else if (_hs < 3.0)
427 {
428 return QColor::fromRgbF(igamma(tn), igamma(tp), igamma(to), a);
429 }
430 else if (_hs < 4.0)
431 {
432 return QColor::fromRgbF(igamma(tn), igamma(to), igamma(tp), a);
433 }
434 else if (_hs < 5.0)
435 {
436 return QColor::fromRgbF(igamma(to), igamma(tn), igamma(tp), a);
437 }
438 else
439 {
440 return QColor::fromRgbF(igamma(tp), igamma(tn), igamma(to), a);
441 }
442}
443
444qreal HCYColorSpace::luma(const QColor& color)
445{
446 return lumag(gamma(color.redF()),
447 gamma(color.greenF()),
448 gamma(color.blueF()));
449}
450
451// -------------------------------------------------------------------------------------
452
453class StateEffects
454{
455public:
456
457 explicit StateEffects(QPalette::ColorGroup state, const KSharedConfigPtr&);
458 ~StateEffects() = default;
459
460 QBrush brush(const QBrush& background) const;
461 QBrush brush(const QBrush& foreground, const QBrush& background) const;
462
463private:
464
465 enum Effects
466 {
467 // Effects
468 Intensity = 0,
469 Color = 1,
470 Contrast = 2,
471 // Intensity
472 IntensityNoEffect = 0,
473 IntensityShade = 1,
474 IntensityDarken = 2,
475 IntensityLighten = 3,
476 // Color
477 ColorNoEffect = 0,
478 ColorDesaturate = 1,
479 ColorFade = 2,
480 ColorTint = 3,
481 // Contrast
482 ContrastNoEffect = 0,
483 ContrastFade = 1,
484 ContrastTint = 2
485 };
486
487private:
488
489 int _effects[3];
490 double _amount[3];
491 QColor _color;
492};
493
494StateEffects::StateEffects(QPalette::ColorGroup state, const KSharedConfigPtr& config)
495 : _color(0, 0, 0, 0)
496{
497 QString group;
498
499 if (state == QPalette::Disabled)
500 {
501 group = QLatin1String("ColorEffects:Disabled");
502 }
503 else if (state == QPalette::Inactive)
504 {
505 group = QLatin1String("ColorEffects:Inactive");
506 }
507
508 _effects[0] = 0;
509 _effects[1] = 0;
510 _effects[2] = 0;
511
512 if (!group.isEmpty())
513 {
514 KConfigGroup cfg(config, group);
515 const bool enabledByDefault = (state == QPalette::Disabled);
516
517 if (cfg.readEntry("Enable", enabledByDefault))
518 {
519 _effects[Intensity] = cfg.readEntry("IntensityEffect", (int)((state == QPalette::Disabled) ? IntensityDarken : IntensityNoEffect));
520 _effects[Color] = cfg.readEntry("ColorEffect", (int)((state == QPalette::Disabled) ? ColorNoEffect : ColorDesaturate));
521 _effects[Contrast] = cfg.readEntry("ContrastEffect", (int)((state == QPalette::Disabled) ? ContrastFade : ContrastTint));
522 _amount[Intensity] = cfg.readEntry("IntensityAmount", (state == QPalette::Disabled) ? 0.10 : 0.0);
523 _amount[Color] = cfg.readEntry("ColorAmount", (state == QPalette::Disabled) ? 0.0 : -0.9);
524 _amount[Contrast] = cfg.readEntry("ContrastAmount", (state == QPalette::Disabled) ? 0.65 : 0.25);
525
526 if (_effects[Color] > ColorNoEffect)
527 {
528 _color = cfg.readEntry("Color", (state == QPalette::Disabled) ? QColor(56, 56, 56)
529 : QColor(112, 111, 110));
530 }
531 }
532 }
533}
534
535QBrush StateEffects::brush(const QBrush& background) const
536{
537 QColor color = background.color(); // TODO - actually work on brushes
538
539 switch (_effects[Intensity])
540 {
541 case IntensityShade:
542 color = ColorTools::shade(color, _amount[Intensity]);
543 break;
544 case IntensityDarken:
545 color = ColorTools::darken(color, _amount[Intensity]);
546 break;
547 case IntensityLighten:
548 color = ColorTools::lighten(color, _amount[Intensity]);
549 break;
550 }
551
552 switch (_effects[Color])
553 {
554 case ColorDesaturate:
555 color = ColorTools::darken(color, 0.0, 1.0 - _amount[Color]);
556 break;
557 case ColorFade:
558 color = ColorTools::mix(color, _color, _amount[Color]);
559 break;
560 case ColorTint:
561 color = ColorTools::tint(color, _color, _amount[Color]);
562 break;
563 }
564
565 return QBrush(color);
566}
567
568QBrush StateEffects::brush(const QBrush& foreground, const QBrush& background) const
569{
570 QColor color = foreground.color();
571 QColor bg = background.color();
572
573 // Apply the foreground effects
574
575 switch (_effects[Contrast])
576 {
577 case ContrastFade:
578 color = ColorTools::mix(color, bg, _amount[Contrast]);
579 break;
580 case ContrastTint:
581 color = ColorTools::tint(color, bg, _amount[Contrast]);
582 break;
583 }
584
585 // Now apply global effects
586
587 return brush(color);
588}
589
590// ------------------------------------------------------------------------------------
591
592struct SetDefaultColors
593{
594 int NormalBackground[3];
595 int AlternateBackground[3];
596 int NormalText[3];
597 int InactiveText[3];
598 int ActiveText[3];
599 int LinkText[3];
600 int VisitedText[3];
601 int NegativeText[3];
602 int NeutralText[3];
603 int PositiveText[3];
604};
605
606struct DecoDefaultColors
607{
608 int Hover[3];
609 int Focus[3];
610};
611
612// these numbers come from the Breeze color scheme
613static const SetDefaultColors defaultViewColors =
614{
615 { 252, 252, 252 }, // Background
616 { 239, 240, 241 }, // Alternate
617 { 49, 54, 59 }, // Normal
618 { 127, 140, 141 }, // Inactive
619 { 61, 174, 233 }, // Active
620 { 41, 128, 185 }, // Link
621 { 127, 140, 141 }, // Visited
622 { 218, 68, 83 }, // Negative
623 { 246, 116, 0 }, // Neutral
624 { 39, 174, 96 } // Positive
625};
626
627static const SetDefaultColors defaultWindowColors =
628{
629 { 239, 240, 241 }, // Background
630 { 189, 195, 199 }, // Alternate
631 { 49, 54, 59 }, // Normal
632 { 127, 140, 141 }, // Inactive
633 { 61, 174, 233 }, // Active
634 { 41, 128, 185 }, // Link
635 { 127, 140, 141 }, // Visited
636 { 218, 68, 83 }, // Negative
637 { 246, 116, 0 }, // Neutral
638 { 39, 174, 96 } // Positive
639};
640
641static const SetDefaultColors defaultButtonColors =
642{
643 { 239, 240, 241 }, // Background
644 { 189, 195, 199 }, // Alternate
645 { 49, 54, 59 }, // Normal
646 { 127, 140, 141 }, // Inactive
647 { 61, 174, 233 }, // Active
648 { 41, 128, 185 }, // Link
649 { 127, 140, 141 }, // Visited
650 { 218, 68, 83 }, // Negative
651 { 246, 116, 0 }, // Neutral
652 { 39, 174, 96 } // Positive
653};
654
655static const SetDefaultColors defaultSelectionColors =
656{
657 { 61, 174, 233 }, // Background
658 { 29, 153, 243 }, // Alternate
659 { 239, 240, 241 }, // Normal
660 { 239, 240, 241 }, // Inactive
661 { 252, 252, 252 }, // Active
662 { 253, 188, 75 }, // Link
663 { 189, 195, 199 }, // Visited
664 { 218, 68, 83 }, // Negative
665 { 246, 116, 0 }, // Neutral
666 { 39, 174, 96 } // Positive
667};
668
669static const SetDefaultColors defaultTooltipColors =
670{
671 { 49, 54, 59 }, // Background
672 { 77, 77, 77 }, // Alternate
673 { 239, 240, 241 }, // Normal
674 { 189, 195, 199 }, // Inactive
675 { 61, 174, 233 }, // Active
676 { 41, 128, 185 }, // Link
677 { 127, 140, 141 }, // Visited
678 { 218, 68, 83 }, // Negative
679 { 246, 116, 0 }, // Neutral
680 { 39, 174, 96 } // Positive
681};
682
683static const SetDefaultColors defaultComplementaryColors =
684{
685 { 49, 54, 59 }, // Background
686 { 77, 77, 77 }, // Alternate
687 { 239, 240, 241 }, // Normal
688 { 189, 195, 199 }, // Inactive
689 { 61, 174, 233 }, // Active
690 { 41, 128, 185 }, // Link
691 { 127, 140, 141 }, // Visited
692 { 218, 68, 83 }, // Negative
693 { 246, 116, 0 }, // Neutral
694 { 39, 174, 96 } // Positive
695};
696
697static const DecoDefaultColors defaultDecorationColors =
698{
699 { 147, 206, 233 }, // Hover
700 { 61, 174, 233 }, // Focus
701};
702
703// ------------------------------------------------------------------------------------
704
705class SchemeManagerPrivate : public QSharedData
706{
707public:
708
709 explicit SchemeManagerPrivate(const KSharedConfigPtr&, QPalette::ColorGroup, const char*, SetDefaultColors);
710 explicit SchemeManagerPrivate(const KSharedConfigPtr&, QPalette::ColorGroup, const char*, SetDefaultColors, const QBrush&);
711 ~SchemeManagerPrivate() = default;
712
713 QBrush background(SchemeManager::BackgroundRole) const;
714 QBrush foreground(SchemeManager::ForegroundRole) const;
715 QBrush decoration(SchemeManager::DecorationRole) const;
716 qreal contrast() const;
717
718private:
719
720 void init(const KSharedConfigPtr&, QPalette::ColorGroup, const char*, SetDefaultColors);
721
722private:
723
724 struct
725 {
726 QBrush fg[8],
727 bg[8],
728 deco[2];
729 } _brushes;
730
731 qreal _contrast;
732};
733
734#define DEFAULT(c) QColor( c[0], c[1], c[2] )
735#define SET_DEFAULT(a) DEFAULT( defaults.a )
736#define DECO_DEFAULT(a) DEFAULT( defaultDecorationColors.a )
737
738SchemeManagerPrivate::SchemeManagerPrivate(const KSharedConfigPtr& config,
739 QPalette::ColorGroup state,
740 const char* group,
741 SetDefaultColors defaults)
742{
743 KConfigGroup cfg(config, group);
744 _contrast = SchemeManager::contrastF(config);
745
746 // loaded-from-config colors (no adjustment)
747 _brushes.bg[0] = cfg.readEntry("BackgroundNormal", SET_DEFAULT(NormalBackground));
748 _brushes.bg[1] = cfg.readEntry("BackgroundAlternate", SET_DEFAULT(AlternateBackground));
749
750 // the rest
751 init(config, state, group, defaults);
752}
753
754SchemeManagerPrivate::SchemeManagerPrivate(const KSharedConfigPtr& config,
755 QPalette::ColorGroup state,
756 const char* group,
757 SetDefaultColors defaults,
758 const QBrush& tint)
759{
760 KConfigGroup cfg(config, group);
761 _contrast = SchemeManager::contrastF(config);
762
763 // loaded-from-config colors
764 _brushes.bg[0] = cfg.readEntry("BackgroundNormal", SET_DEFAULT(NormalBackground));
765 _brushes.bg[1] = cfg.readEntry("BackgroundAlternate", SET_DEFAULT(AlternateBackground));
766
767 // adjustment
768 _brushes.bg[0] = ColorTools::tint(_brushes.bg[0].color(), tint.color(), 0.4);
769 _brushes.bg[1] = ColorTools::tint(_brushes.bg[1].color(), tint.color(), 0.4);
770
771 // the rest
772 init(config, state, group, defaults);
773}
774
775void SchemeManagerPrivate::init(const KSharedConfigPtr& config,
776 QPalette::ColorGroup state,
777 const char* group,
778 SetDefaultColors defaults)
779{
780 KConfigGroup cfg(config, group);
781
782 // loaded-from-config colors
783 _brushes.fg[0] = cfg.readEntry("ForegroundNormal", SET_DEFAULT(NormalText));
784 _brushes.fg[1] = cfg.readEntry("ForegroundInactive", SET_DEFAULT(InactiveText));
785 _brushes.fg[2] = cfg.readEntry("ForegroundActive", SET_DEFAULT(ActiveText));
786 _brushes.fg[3] = cfg.readEntry("ForegroundLink", SET_DEFAULT(LinkText));
787 _brushes.fg[4] = cfg.readEntry("ForegroundVisited", SET_DEFAULT(VisitedText));
788 _brushes.fg[5] = cfg.readEntry("ForegroundNegative", SET_DEFAULT(NegativeText));
789 _brushes.fg[6] = cfg.readEntry("ForegroundNeutral", SET_DEFAULT(NeutralText));
790 _brushes.fg[7] = cfg.readEntry("ForegroundPositive", SET_DEFAULT(PositiveText));
791 _brushes.deco[0] = cfg.readEntry("DecorationHover", DECO_DEFAULT(Hover));
792 _brushes.deco[1] = cfg.readEntry("DecorationFocus", DECO_DEFAULT(Focus));
793
794 // apply state adjustments
795
796 if (state != QPalette::Active)
797 {
798 StateEffects effects(state, config);
799
800 for (auto &brush : _brushes.fg)
801 {
802 brush = effects.brush(brush, _brushes.bg[0]);
803 }
804
805 _brushes.deco[0] = effects.brush(_brushes.deco[0], _brushes.bg[0]);
806 _brushes.deco[1] = effects.brush(_brushes.deco[1], _brushes.bg[0]);
807 _brushes.bg[0] = effects.brush(_brushes.bg[0]);
808 _brushes.bg[1] = effects.brush(_brushes.bg[1]);
809 }
810
811 // calculated backgrounds
812 _brushes.bg[2] = ColorTools::tint(_brushes.bg[0].color(), _brushes.fg[2].color());
813 _brushes.bg[3] = ColorTools::tint(_brushes.bg[0].color(), _brushes.fg[3].color());
814 _brushes.bg[4] = ColorTools::tint(_brushes.bg[0].color(), _brushes.fg[4].color());
815 _brushes.bg[5] = ColorTools::tint(_brushes.bg[0].color(), _brushes.fg[5].color());
816 _brushes.bg[6] = ColorTools::tint(_brushes.bg[0].color(), _brushes.fg[6].color());
817 _brushes.bg[7] = ColorTools::tint(_brushes.bg[0].color(), _brushes.fg[7].color());
818}
819
820QBrush SchemeManagerPrivate::background(SchemeManager::BackgroundRole role) const
821{
822 switch (role)
823 {
824 case SchemeManager::AlternateBackground:
825 return _brushes.bg[1];
826 case SchemeManager::ActiveBackground:
827 return _brushes.bg[2];
828 case SchemeManager::LinkBackground:
829 return _brushes.bg[3];
830 case SchemeManager::VisitedBackground:
831 return _brushes.bg[4];
832 case SchemeManager::NegativeBackground:
833 return _brushes.bg[5];
834 case SchemeManager::NeutralBackground:
835 return _brushes.bg[6];
836 case SchemeManager::PositiveBackground:
837 return _brushes.bg[7];
838 default:
839 return _brushes.bg[0];
840 }
841}
842
843QBrush SchemeManagerPrivate::foreground(SchemeManager::ForegroundRole role) const
844{
845 switch (role)
846 {
847 case SchemeManager::InactiveText:
848 return _brushes.fg[1];
849 case SchemeManager::ActiveText:
850 return _brushes.fg[2];
851 case SchemeManager::LinkText:
852 return _brushes.fg[3];
853 case SchemeManager::VisitedText:
854 return _brushes.fg[4];
855 case SchemeManager::NegativeText:
856 return _brushes.fg[5];
857 case SchemeManager::NeutralText:
858 return _brushes.fg[6];
859 case SchemeManager::PositiveText:
860 return _brushes.fg[7];
861 default:
862 return _brushes.fg[0];
863 }
864}
865
866QBrush SchemeManagerPrivate::decoration(SchemeManager::DecorationRole role) const
867{
868 switch (role)
869 {
870 case SchemeManager::FocusColor:
871 return _brushes.deco[1];
872 default:
873 return _brushes.deco[0];
874 }
875}
876
877qreal SchemeManagerPrivate::contrast() const
878{
879 return _contrast;
880}
881
882// ------------------------------------------------------------------------------------
883
887
888SchemeManager::~SchemeManager()
889{
890}
891
892SchemeManager& SchemeManager::operator=(const SchemeManager& other)
893{
894 d = other.d;
895 return *this;
896}
897
898SchemeManager::SchemeManager(QPalette::ColorGroup state, ColorSet set, KSharedConfigPtr config)
899{
900 if (!config)
901 {
902 config = KSharedConfig::openConfig();
903 }
904
905 switch (set)
906 {
907 case Window:
908 d = new SchemeManagerPrivate(config, state, "Colors:Window", defaultWindowColors);
909 break;
910 case Button:
911 d = new SchemeManagerPrivate(config, state, "Colors:Button", defaultButtonColors);
912 break;
913 case Selection:
914 {
915 KConfigGroup group(config, "ColorEffects:Inactive");
916 // NOTE: keep this in sync with kdebase/workspace/kcontrol/colors/colorscm.cpp
917 bool inactiveSelectionEffect = group.readEntry("ChangeSelectionColor", group.readEntry("Enable", true));
918 // if enabled, inactiver/disabled uses Window colors instead, ala gtk
919 // ...except tinted with the Selection:NormalBackground color so it looks more like selection
920 if (state == QPalette::Active || (state == QPalette::Inactive && !inactiveSelectionEffect))
921 {
922 d = new SchemeManagerPrivate(config, state, "Colors:Selection", defaultSelectionColors);
923 }
924 else if (state == QPalette::Inactive)
925 {
926 d = new SchemeManagerPrivate(config, state, "Colors:Window", defaultWindowColors,
927 SchemeManager(QPalette::Active, Selection, config).background());
928 }
929 else
930 {
931 // disabled (...and still want this branch when inactive+disabled exists)
932 d = new SchemeManagerPrivate(config, state, "Colors:Window", defaultWindowColors);
933 }
934 }
935 break;
936 case Tooltip:
937 d = new SchemeManagerPrivate(config, state, "Colors:Tooltip", defaultTooltipColors);
938 break;
939 case Complementary:
940 d = new SchemeManagerPrivate(config, state, "Colors:Complementary", defaultComplementaryColors);
941 break;
942 default:
943 d = new SchemeManagerPrivate(config, state, "Colors:View", defaultViewColors);
944 }
945}
946
947int SchemeManager::contrast()
948{
949 KConfigGroup g(KSharedConfig::openConfig(), "KDE");
950
951 return g.readEntry("contrast", 7);
952}
953
954qreal SchemeManager::contrastF(const KSharedConfigPtr& config)
955{
956 if (config)
957 {
958 KConfigGroup g(config, "KDE");
959
960 return 0.1 * g.readEntry("contrast", 7);
961 }
962
963 return 0.1 * (qreal)contrast();
964}
965
966QBrush SchemeManager::background(BackgroundRole role) const
967{
968 return d->background(role);
969}
970
971QBrush SchemeManager::foreground(ForegroundRole role) const
972{
973 return d->foreground(role);
974}
975
976QBrush SchemeManager::decoration(DecorationRole role) const
977{
978 return d->decoration(role);
979}
980
981QColor SchemeManager::shade(ShadeRole role) const
982{
983 return shade(background().color(), role, d->contrast());
984}
985
986QColor SchemeManager::shade(const QColor& color, ShadeRole role)
987{
988 return shade(color, role, SchemeManager::contrastF());
989}
990
991QColor SchemeManager::shade(const QColor& color, ShadeRole role, qreal contrast, qreal chromaAdjust)
992{
993 // nan -> 1.0
994 contrast = ((1.0 > contrast) ? ((-1.0 < contrast) ? contrast
995 : -1.0)
996 : 1.0);
997 qreal y = ColorTools::luma(color);
998 qreal yi = 1.0 - y;
999
1000 // handle very dark colors (base, mid, dark, shadow == midlight, light)
1001 if (y < 0.006)
1002 {
1003 switch (role)
1004 {
1005 case SchemeManager::LightShade:
1006 return ColorTools::shade(color, 0.05 + 0.95 * contrast, chromaAdjust);
1007 case SchemeManager::MidShade:
1008 return ColorTools::shade(color, 0.01 + 0.20 * contrast, chromaAdjust);
1009 case SchemeManager::DarkShade:
1010 return ColorTools::shade(color, 0.02 + 0.40 * contrast, chromaAdjust);
1011 default:
1012 return ColorTools::shade(color, 0.03 + 0.60 * contrast, chromaAdjust);
1013 }
1014 }
1015
1016 // handle very light colors (base, midlight, light == mid, dark, shadow)
1017 if (y > 0.93)
1018 {
1019 switch (role)
1020 {
1021 case SchemeManager::MidlightShade:
1022 return ColorTools::shade(color, -0.02 - 0.20 * contrast, chromaAdjust);
1023 case SchemeManager::DarkShade:
1024 return ColorTools::shade(color, -0.06 - 0.60 * contrast, chromaAdjust);
1025 case SchemeManager::ShadowShade:
1026 return ColorTools::shade(color, -0.10 - 0.90 * contrast, chromaAdjust);
1027 default:
1028 return ColorTools::shade(color, -0.04 - 0.40 * contrast, chromaAdjust);
1029 }
1030 }
1031
1032 // handle everything else
1033 qreal lightAmount = (0.05 + y * 0.55) * (0.25 + contrast * 0.75);
1034 qreal darkAmount = (- y) * (0.55 + contrast * 0.35);
1035
1036 switch (role)
1037 {
1038 case SchemeManager::LightShade:
1039 return ColorTools::shade(color, lightAmount, chromaAdjust);
1040 case SchemeManager::MidlightShade:
1041 return ColorTools::shade(color, (0.15 + 0.35 * yi) * lightAmount, chromaAdjust);
1042 case SchemeManager::MidShade:
1043 return ColorTools::shade(color, (0.35 + 0.15 * y) * darkAmount, chromaAdjust);
1044 case SchemeManager::DarkShade:
1045 return ColorTools::shade(color, darkAmount, chromaAdjust);
1046 default:
1047 return ColorTools::darken(ColorTools::shade(color, darkAmount, chromaAdjust), 0.5 + 0.3 * y);
1048 }
1049}
1050
1058
1066
1067QPalette SchemeManager::createApplicationPalette(const KSharedConfigPtr& config)
1068{
1069 QPalette palette;
1070
1071 static const QPalette::ColorGroup states[3] =
1072 {
1073 QPalette::Active,
1074 QPalette::Inactive,
1075 QPalette::Disabled
1076 };
1077
1078 // TT thinks tooltips shouldn't use active, so we use our active colors for all states
1079 SchemeManager schemeTooltip(QPalette::Active, SchemeManager::Tooltip, config);
1080
1081 for (auto &state : states)
1082 {
1083 SchemeManager schemeView(state, SchemeManager::View, config);
1084 SchemeManager schemeWindow(state, SchemeManager::Window, config);
1085 SchemeManager schemeButton(state, SchemeManager::Button, config);
1086 SchemeManager schemeSelection(state, SchemeManager::Selection, config);
1087
1088 palette.setBrush(state, QPalette::WindowText, schemeWindow.foreground());
1089 palette.setBrush(state, QPalette::Window, schemeWindow.background());
1090 palette.setBrush(state, QPalette::Base, schemeView.background());
1091 palette.setBrush(state, QPalette::Text, schemeView.foreground());
1092 palette.setBrush(state, QPalette::Button, schemeButton.background());
1093 palette.setBrush(state, QPalette::ButtonText, schemeButton.foreground());
1094 palette.setBrush(state, QPalette::Highlight, schemeSelection.background());
1095 palette.setBrush(state, QPalette::HighlightedText, schemeSelection.foreground());
1096 palette.setBrush(state, QPalette::ToolTipBase, schemeTooltip.background());
1097 palette.setBrush(state, QPalette::ToolTipText, schemeTooltip.foreground());
1098
1099 palette.setColor(state, QPalette::Light, schemeWindow.shade(SchemeManager::LightShade));
1100 palette.setColor(state, QPalette::Midlight, schemeWindow.shade(SchemeManager::MidlightShade));
1101 palette.setColor(state, QPalette::Mid, schemeWindow.shade(SchemeManager::MidShade));
1102 palette.setColor(state, QPalette::Dark, schemeWindow.shade(SchemeManager::DarkShade));
1103 palette.setColor(state, QPalette::Shadow, schemeWindow.shade(SchemeManager::ShadowShade));
1104
1105 palette.setBrush(state, QPalette::AlternateBase, schemeView.background(SchemeManager::AlternateBackground));
1106 palette.setBrush(state, QPalette::Link, schemeView.foreground(SchemeManager::LinkText));
1107 palette.setBrush(state, QPalette::LinkVisited, schemeView.foreground(SchemeManager::VisitedText));
1108 }
1109
1110 return palette;
1111}
1112
KConfigGroup::readEntry
QString readEntry(const char *key, const char *aDefault=nullptr) const
KSharedConfig::openConfig
static KSharedConfig::Ptr openConfig(const QString &fileName=QString(), OpenFlags mode=FullConfig, QStandardPaths::StandardLocation type=QStandardPaths::GenericConfigLocation)
SchemeManager
A set of methods used to work with colors.
Definition schememanager.h:53
SchemeManager::ColorSet
ColorSet
This enumeration describes the color set for which a color is being selected.
Definition schememanager.h:64
SchemeManager::Selection
@ Selection
Selected items in views.
Definition schememanager.h:92
SchemeManager::Complementary
@ Complementary
Complementary areas.
Definition schememanager.h:111
SchemeManager::View
@ View
Views; for example, frames, input fields, etc.
Definition schememanager.h:70
SchemeManager::Button
@ Button
Buttons and button-like controls.
Definition schememanager.h:84
SchemeManager::Window
@ Window
Non-editable window elements; for example, menus.
Definition schememanager.h:76
SchemeManager::Tooltip
@ Tooltip
Tooltips.
Definition schememanager.h:101
SchemeManager::background
QBrush background(BackgroundRole=NormalBackground) const
Retrieve the requested background brush.
Definition schememanager.cpp:966
SchemeManager::adjustBackground
static void adjustBackground(QPalette &, BackgroundRole newRole=NormalBackground, QPalette::ColorRole color=QPalette::Base, ColorSet set=View, KSharedConfigPtr=KSharedConfigPtr())
Adjust a QPalette by replacing the specified QPalette::ColorRole with the requested background color ...
Definition schememanager.cpp:1051
SchemeManager::contrastF
static qreal contrastF(const KSharedConfigPtr &config=KSharedConfigPtr())
Returns the contrast for borders as a floating point value.
Definition schememanager.cpp:954
SchemeManager::BackgroundRole
BackgroundRole
This enumeration describes the background color being selected from the given set.
Definition schememanager.h:124
SchemeManager::LinkBackground
@ LinkBackground
Fourth color; corresponds to (unvisited) links.
Definition schememanager.h:154
SchemeManager::PositiveBackground
@ PositiveBackground
Eigth color; for example, success messages, trusted content.
Definition schememanager.h:174
SchemeManager::AlternateBackground
@ AlternateBackground
Alternate background; for example, for use in lists.
Definition schememanager.h:135
SchemeManager::ActiveBackground
@ ActiveBackground
Third color; for example, items which are new, active, requesting attention, etc.
Definition schememanager.h:145
SchemeManager::VisitedBackground
@ VisitedBackground
Fifth color; corresponds to visited links.
Definition schememanager.h:162
SchemeManager::NegativeBackground
@ NegativeBackground
Sixth color; for example, errors, untrusted content, etc.
Definition schememanager.h:166
SchemeManager::NeutralBackground
@ NeutralBackground
Seventh color; for example, warnings, secure/encrypted content.
Definition schememanager.h:170
SchemeManager::ForegroundRole
ForegroundRole
This enumeration describes the foreground color being selected from the given set.
Definition schememanager.h:194
SchemeManager::InactiveText
@ InactiveText
Second color; for example, comments, items which are old, inactive or disabled.
Definition schememanager.h:205
SchemeManager::LinkText
@ LinkText
Fourth color; use for (unvisited) links.
Definition schememanager.h:216
SchemeManager::VisitedText
@ VisitedText
Fifth color; used for (visited) links.
Definition schememanager.h:224
SchemeManager::ActiveText
@ ActiveText
Third color; for example items which are new, active, requesting attention, etc.
Definition schememanager.h:210
SchemeManager::NegativeText
@ NegativeText
Sixth color; for example, errors, untrusted content, deletions, etc.
Definition schememanager.h:229
SchemeManager::NeutralText
@ NeutralText
Seventh color; for example, warnings, secure/encrypted content.
Definition schememanager.h:233
SchemeManager::PositiveText
@ PositiveText
Eigth color; for example, additions, success messages, trusted content.
Definition schememanager.h:238
SchemeManager::operator=
SchemeManager & operator=(const SchemeManager &)
Standard assignment operator.
Definition schememanager.cpp:892
SchemeManager::adjustForeground
static void adjustForeground(QPalette &, ForegroundRole newRole=NormalText, QPalette::ColorRole color=QPalette::Text, ColorSet set=View, KSharedConfigPtr=KSharedConfigPtr())
Adjust a QPalette by replacing the specified QPalette::ColorRole with the requested foreground color ...
Definition schememanager.cpp:1059
SchemeManager::contrast
static int contrast()
Returns the contrast for borders.
Definition schememanager.cpp:947
SchemeManager::DecorationRole
DecorationRole
This enumeration describes the decoration color being selected from the given set.
Definition schememanager.h:251
SchemeManager::FocusColor
@ FocusColor
Color used to draw decorations for items which have input focus.
Definition schememanager.h:255
SchemeManager::createApplicationPalette
static QPalette createApplicationPalette(const KSharedConfigPtr &config)
Used to obtain the QPalette that will be used to set the application palette from KDE Platform theme.
Definition schememanager.cpp:1067
SchemeManager::shade
QColor shade(ShadeRole) const
Retrieve the requested shade color, using SchemeManager::background(SchemeManager::NormalBackground) ...
Definition schememanager.cpp:981
SchemeManager::decoration
QBrush decoration(DecorationRole) const
Retrieve the requested decoration brush.
Definition schememanager.cpp:976
SchemeManager::ShadeRole
ShadeRole
This enumeration describes the color shade being selected from the given set.
Definition schememanager.h:272
SchemeManager::DarkShade
@ DarkShade
The dark color is in between mid() and shadow().
Definition schememanager.h:289
SchemeManager::MidlightShade
@ MidlightShade
The midlight color is in between base() and light().
Definition schememanager.h:281
SchemeManager::LightShade
@ LightShade
The light color is lighter than dark() or shadow() and contrasts with the base color.
Definition schememanager.h:277
SchemeManager::ShadowShade
@ ShadowShade
The shadow color is darker than light() or midlight() and contrasts the base color.
Definition schememanager.h:294
SchemeManager::MidShade
@ MidShade
The mid color is in between base() and dark().
Definition schememanager.h:285
SchemeManager::foreground
QBrush foreground(ForegroundRole=NormalText) const
Retrieve the requested foreground brush.
Definition schememanager.cpp:971
SchemeManager::SchemeManager
SchemeManager(const SchemeManager &)
Construct a copy of another SchemeManager.
Definition schememanager.cpp:884
KColorUtils::darken
KGUIADDONS_EXPORT QColor darken(const QColor &, qreal amount=0.5, qreal chromaGain=1.0)
KColorUtils::overlayColors
KGUIADDONS_EXPORT QColor overlayColors(const QColor &base, const QColor &paint, QPainter::CompositionMode comp=QPainter::CompositionMode_SourceOver)
KColorUtils::getHcy
KGUIADDONS_EXPORT void getHcy(const QColor &, qreal *hue, qreal *chroma, qreal *luma, qreal *alpha=nullptr)
KColorUtils::luma
KGUIADDONS_EXPORT qreal luma(const QColor &)
KColorUtils::shade
KGUIADDONS_EXPORT QColor shade(const QColor &, qreal lumaAmount, qreal chromaAmount=0.0)
KColorUtils::mix
KGUIADDONS_EXPORT QColor mix(const QColor &c1, const QColor &c2, qreal bias=0.5)
KColorUtils::tint
KGUIADDONS_EXPORT QColor tint(const QColor &base, const QColor &color, qreal amount=0.3)
KColorUtils::lighten
KGUIADDONS_EXPORT QColor lighten(const QColor &, qreal amount=0.5, qreal chromaInverseGain=1.0)
KColorUtils::contrastRatio
KGUIADDONS_EXPORT qreal contrastRatio(const QColor &, const QColor &)
KItinerary::StringUtil::normalize
QString normalize(QStringView str)
QBrush::color
const QColor & color() const const
QColor::alphaF
float alphaF() const const
QColor::blueF
float blueF() const const
QColor::fromRgbF
QColor fromRgbF(float r, float g, float b, float a)
QColor::greenF
float greenF() const const
QColor::redF
float redF() const const
QColor::setAlpha
void setAlpha(int alpha)
QImage::Format_ARGB32_Premultiplied
Format_ARGB32_Premultiplied
QPalette::setBrush
void setBrush(ColorGroup group, ColorRole role, const QBrush &brush)
QPalette::setColor
void setColor(ColorGroup group, ColorRole role, const QColor &color)
QString::isEmpty
bool isEmpty() const const
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