1 /* Copyright (C) Roland Pallai <dap78@magex.hu>
3 This file is part of the Trojita Qt IMAP e-mail client,
4 http://trojita.flaska.net/
6 This program is free software; you can redistribute it and/or
7 modify it under the terms of the GNU General Public License as
8 published by the Free Software Foundation; either version 2 of
9 the License or (at your option) version 3 or any later version
10 accepted by the membership of KDE e.V. (or its successor approved
11 by the membership of KDE e.V.), which shall act as a proxy
12 defined in Section 14 of version 3 of the license.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>.
23 #include "ColoredItemDelegate.h"
28 ColoredItemDelegate::ColoredItemDelegate(QObject
*parent
) : QStyledItemDelegate(parent
)
32 void ColoredItemDelegate::paint(QPainter
*painter
, const QStyleOptionViewItem
&option
, const QModelIndex
&index
) const
34 QStyleOptionViewItem
viewOption(option
);
35 QColor itemForegroundColor
= index
.data(Qt::ForegroundRole
).value
<QColor
>();
36 if (itemForegroundColor
.isValid()) {
37 // Thunderbird works like this and we like it
38 viewOption
.palette
.setColor(QPalette::ColorGroup::Active
, QPalette::Highlight
, itemForegroundColor
);
40 // We have to make sure that the text remains readable with the new Highlight color.
41 // This covers most of the cases out there if not all. Feel free to extend if you are using a very
43 auto fgLightnessF
= viewOption
.palette
.color(QPalette::ColorGroup::Active
, QPalette::HighlightedText
).lightnessF();
44 auto bgLightnessF
= viewOption
.palette
.color(QPalette::ColorGroup::Active
, QPalette::Highlight
).lightnessF();
45 if (fgLightnessF
> 0.75 && bgLightnessF
> 0.75) {
46 viewOption
.palette
.setColor(QPalette::ColorGroup::Active
, QPalette::HighlightedText
, Qt::black
);
48 if (fgLightnessF
< 0.25 && bgLightnessF
< 0.25) {
49 viewOption
.palette
.setColor(QPalette::ColorGroup::Active
, QPalette::HighlightedText
, Qt::white
);
52 viewOption
.palette
.setColor(QPalette::ColorGroup::Inactive
, QPalette::HighlightedText
, itemForegroundColor
);
54 QStyledItemDelegate::paint(painter
, viewOption
, index
);