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Diffstat (limited to 'ui/qt/utils/color_utils.cpp')
-rw-r--r-- | ui/qt/utils/color_utils.cpp | 216 |
1 files changed, 216 insertions, 0 deletions
diff --git a/ui/qt/utils/color_utils.cpp b/ui/qt/utils/color_utils.cpp new file mode 100644 index 0000000..e7d7c6c --- /dev/null +++ b/ui/qt/utils/color_utils.cpp @@ -0,0 +1,216 @@ +/* color_utils.cpp + * + * Wireshark - Network traffic analyzer + * By Gerald Combs <gerald@wireshark.org> + * Copyright 1998 Gerald Combs + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#include <ui/qt/utils/color_utils.h> +#include <ui/qt/utils/tango_colors.h> + +#include <QApplication> +#include <QPalette> + +#if QT_VERSION >= QT_VERSION_CHECK(6, 5, 0) +#include <QStyleHints> +#endif + +// Colors we use in various parts of the UI. +// +// New colors should be chosen from tango_colors.h. The expert and hidden +// colors come from the GTK+ UI and are grandfathered in. +// +// At some point we should probably make these configurable along with the +// graph and sequence colors. + +const QColor ColorUtils::expert_color_comment = QColor (0xb7, 0xf7, 0x74); /* Green */ +const QColor ColorUtils::expert_color_chat = QColor (0x80, 0xb7, 0xf7); /* Light blue */ +const QColor ColorUtils::expert_color_note = QColor (0xa0, 0xff, 0xff); /* Bright turquoise */ +const QColor ColorUtils::expert_color_warn = QColor (0xf7, 0xf2, 0x53); /* Yellow */ +const QColor ColorUtils::expert_color_error = QColor (0xff, 0x5c, 0x5c); /* Pale red */ +const QColor ColorUtils::expert_color_foreground = QColor (0x00, 0x00, 0x00); /* Black */ +const QColor ColorUtils::hidden_proto_item = QColor (0x44, 0x44, 0x44); /* Gray */ + +ColorUtils::ColorUtils(QObject *parent) : + QObject(parent) +{ +} + +// +// A color_t has RGB values in [0,65535]. +// Qt RGB colors have RGB values in [0,255]. +// +// 65535/255 = 257 = 0x0101, so converting from [0,255] to +// [0,65535] involves just shifting the 8-bit value left 8 bits +// and ORing them together. +// +// Converting from [0,65535] to [0,255] without rounding involves +// just shifting the 16-bit value right 8 bits; I guess you could +// round them by adding 0x80 to the value before shifting. +// +QColor ColorUtils::fromColorT (const color_t *color) { + if (!color) return QColor(); + // Convert [0,65535] values to [0,255] values + return QColor(color->red >> 8, color->green >> 8, color->blue >> 8); +} + +QColor ColorUtils::fromColorT(color_t color) +{ + return fromColorT(&color); +} + +const color_t ColorUtils::toColorT(const QColor color) +{ + color_t colort; + + // Convert [0,255] values to [0,65535] values + colort.red = (color.red() << 8) | color.red(); + colort.green = (color.green() << 8) | color.green(); + colort.blue = (color.blue() << 8) | color.blue(); + + return colort; +} + +QRgb ColorUtils::alphaBlend(const QColor &color1, const QColor &color2, qreal alpha) +{ + alpha = qBound(qreal(0.0), alpha, qreal(1.0)); + + int r1 = color1.red() * alpha; + int g1 = color1.green() * alpha; + int b1 = color1.blue() * alpha; + int r2 = color2.red() * (1 - alpha); + int g2 = color2.green() * (1 - alpha); + int b2 = color2.blue() * (1 - alpha); + + QColor alpha_color(r1 + r2, g1 + g2, b1 + b2); + return alpha_color.rgb(); +} + +QRgb ColorUtils::alphaBlend(const QBrush &brush1, const QBrush &brush2, qreal alpha) +{ + return alphaBlend(brush1.color(), brush2.color(), alpha); +} + +QList<QRgb> ColorUtils::graph_colors_; +const QList<QRgb> ColorUtils::graphColors() +{ + if (graph_colors_.isEmpty()) { + // Available graph colors + // XXX - Add custom + graph_colors_ = QList<QRgb>() + << tango_aluminium_6 // Bar outline (use black instead)? + << tango_sky_blue_5 + << tango_butter_6 + << tango_chameleon_5 + << tango_scarlet_red_5 + << tango_plum_5 + << tango_orange_6 + << tango_aluminium_3 + << tango_sky_blue_3 + << tango_butter_3 + << tango_chameleon_3 + << tango_scarlet_red_3 + << tango_plum_3 + << tango_orange_3; + } + return graph_colors_; +} + +QRgb ColorUtils::graphColor(int item) +{ + if (graph_colors_.isEmpty()) graphColors(); // Init list. + return graph_colors_[item % graph_colors_.size()]; +} + +QList<QRgb> ColorUtils::sequence_colors_; +QRgb ColorUtils::sequenceColor(int item) +{ + if (sequence_colors_.isEmpty()) { + // Available sequence colors. Copied from gtk/graph_analysis.c. + // XXX - Add custom? + sequence_colors_ = QList<QRgb>() + << qRgb(144, 238, 144) + << qRgb(255, 160, 123) + << qRgb(255, 182, 193) + << qRgb(250, 250, 210) + << qRgb(255, 255, 52) + << qRgb(103, 205, 170) + << qRgb(224, 255, 255) + << qRgb(176, 196, 222) + << qRgb(135, 206, 254) + << qRgb(211, 211, 211); + } + return sequence_colors_[item % sequence_colors_.size()]; +} + +bool ColorUtils::themeIsDark() +{ +#if QT_VERSION >= QT_VERSION_CHECK(6, 5, 0) + return qApp->styleHints()->colorScheme() == Qt::ColorScheme::Dark; +#else + return qApp->palette().windowText().color().lightness() > qApp->palette().window().color().lightness(); +#endif +} + +// Qt < 5.12.6 on macOS always uses Qt::blue for the link color, which is +// unreadable when using a dark theme. Changing the application palette +// via ...Application::setPalette is problematic, since QGuiApplication +// sets a flag (ApplicationPaletteExplicitlySet) which keeps us from +// catching theme changes. +// +// themeLinkBrush and themeLinkStyle provide convenience routines for +// fetching the link brush and style. +// +// We could also override MainApplication::palette, but keeping the +// routines together here seemed to make more sense. +QBrush ColorUtils::themeLinkBrush() +{ +#if QT_VERSION < QT_VERSION_CHECK(5, 12, 6) + // https://bugreports.qt.io/browse/QTBUG-71740 + if (themeIsDark()) { + return QBrush(tango_sky_blue_2); + } +#endif + return qApp->palette().link(); +} + +QString ColorUtils::themeLinkStyle() +{ + QString link_style; + + if (themeIsDark()) { + link_style = QString("<style>a:link { color: %1; }</style>") + .arg(themeLinkBrush().color().name()); + } + return link_style; +} + +const QColor ColorUtils::contrastingTextColor(const QColor color) +{ + bool background_is_light = color.lightness() > 127; + if ( (background_is_light && !ColorUtils::themeIsDark()) || (!background_is_light && ColorUtils::themeIsDark()) ) { + return QApplication::palette().text().color(); + } + return QApplication::palette().base().color(); +} + +const QColor ColorUtils::hoverBackground() +{ + QPalette hover_palette = QApplication::palette(); +#if defined(Q_OS_MAC) + hover_palette.setCurrentColorGroup(QPalette::Active); + return hover_palette.highlight().color(); +#else + return ColorUtils::alphaBlend(hover_palette.window(), hover_palette.highlight(), 0.5); +#endif +} + +const QColor ColorUtils::warningBackground() +{ + if (themeIsDark()) { + return QColor(tango_butter_6); + } + return QColor(tango_butter_2); +} |