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A highlighted menu item's icon was redrawn in the highlighted-text color, white in most palettes, for the highlight bar Fusion draws. The Windows 11 style draws a pale fill and the normal text color instead, so the white icon disappeared on light colors (issue #1591). Leave the icon to the ordinary hover tint there, except in high contrast, where that style does draw a highlight bar. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
77 lines
3.0 KiB
C++
77 lines
3.0 KiB
C++
/*
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Copyright 2006-2026 The QElectroTech Team
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This file is part of QElectroTech.
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QElectroTech is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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QElectroTech is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with QElectroTech. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef QET_STYLE_H
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#define QET_STYLE_H
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#include <QHash>
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#include <QIcon>
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#include <QProxyStyle>
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/**
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@brief The QETStyle class
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A proxy over the running widget style that gives icons a hover state.
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QToolButton, QTabBar and item views ask the application style for the
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QIcon::Active pixmap of an icon while the mouse is over it. Every
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built-in style returns the icon unchanged for that mode, so only the
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button frame changes on hover, and on a dark palette Fusion's frame is
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too faint to see (GitHub #870). This proxy answers QIcon::Active for
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line-art icons with the icon tinted in the palette's highlight color,
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lightened when needed to reach 3:1 on a button face, so the icon
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itself changes on both light and dark palettes. Colored icons keep
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their colors. Every other mode is left to the base style.
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Fusion also asks for QIcon::Active for the icon of a highlighted menu
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item and paints it on the highlight bar, where the hover tint would
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vanish. The generated pixmap is cached per icon and cannot tell a
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menu from a toolbar, so drawControl(CE_MenuItem) hands the base style
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an icon whose Active pixmap is the icon in the highlighted-text color.
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The Windows 11 style draws no highlight bar (see hasMenuHighlightBar()),
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so its highlighted menu items keep the hover tint.
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*/
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class QETStyle : public QProxyStyle
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{
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Q_OBJECT
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public:
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explicit QETStyle(QStyle *base);
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~QETStyle() override = default;
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QPixmap generatedIconPixmap(QIcon::Mode mode,
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const QPixmap &pixmap,
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const QStyleOption *option) const override;
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void drawControl(ControlElement element,
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const QStyleOption *option,
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QPainter *painter,
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const QWidget *widget = nullptr) const override;
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/// True when fewer than a fifth of the visible pixels are saturated.
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static bool isLineArt(const QImage &image);
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/// The highlight color, lightened until it reads at 3:1 on a button.
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static QColor hoverColor(const QPalette &palette);
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/// pixmap with every pixel set to color, alpha kept.
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static QPixmap tinted(const QPixmap &pixmap, const QColor &color);
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private:
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bool hasMenuHighlightBar() const;
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QIcon menuIcon(const QIcon &icon, const QPalette &palette, int size, qreal dpr) const;
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mutable QHash<QString, QIcon> menu_icons_;
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};
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#endif
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