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Diffstat (limited to 'ui/qt/models/percent_bar_delegate.cpp')
-rw-r--r-- | ui/qt/models/percent_bar_delegate.cpp | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/ui/qt/models/percent_bar_delegate.cpp b/ui/qt/models/percent_bar_delegate.cpp new file mode 100644 index 0000000..091c5fb --- /dev/null +++ b/ui/qt/models/percent_bar_delegate.cpp @@ -0,0 +1,91 @@ +/* percent_bar_delegate.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/models/percent_bar_delegate.h> + +#include <ui/qt/utils/color_utils.h> + +#include <QApplication> +#include <QPainter> + +static const int bar_em_width_ = 8; +static const double bar_blend_ = 0.15; + +void PercentBarDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, + const QModelIndex &index) const +{ + QStyleOptionViewItem option_vi = option; + QStyledItemDelegate::initStyleOption(&option_vi, index); + + // Paint our rect with no text using the current style, then draw our + // bar and text over it. + QStyledItemDelegate::paint(painter, option, index); + + bool ok = false; + double value = index.data(Qt::UserRole).toDouble(&ok); + + if (!ok || !index.data(Qt::DisplayRole).toString().isEmpty()) { + // We don't have a valid value or the item has visible text. + return; + } + + // If our value is out range our caller has a bug. Clamp the graph and + // Print the numeric value so that the bug is obvious. + QString pct_str = QString::number(value, 'f', 1); + if (value < 0) { + value = 0; + } + if (value > 100.0) { + value = 100.0; + } + + if (QApplication::style()->objectName().contains("vista")) { + // QWindowsVistaStyle::drawControl does this internally. Unfortunately there + // doesn't appear to be a more general way to do this. + option_vi.palette.setColor(QPalette::All, QPalette::HighlightedText, + option_vi.palette.color(QPalette::Active, QPalette::Text)); + } + + QPalette::ColorGroup cg = option_vi.state & QStyle::State_Enabled + ? QPalette::Normal : QPalette::Disabled; + QColor text_color = option_vi.palette.color(cg, QPalette::Text); + QColor bar_color = ColorUtils::alphaBlend(option_vi.palette.windowText(), + option_vi.palette.window(), bar_blend_); + + if (cg == QPalette::Normal && !(option_vi.state & QStyle::State_Active)) + cg = QPalette::Inactive; + if (option_vi.state & QStyle::State_Selected) { + text_color = option_vi.palette.color(cg, QPalette::HighlightedText); + bar_color = ColorUtils::alphaBlend(option_vi.palette.color(cg, QPalette::Window), + option_vi.palette.color(cg, QPalette::Highlight), + bar_blend_); + } + + painter->save(); + int border_radius = 3; // We use 3 px elsewhere, e.g. filter combos. + QRect pct_rect = option.rect; + pct_rect.adjust(1, 1, -1, -1); + pct_rect.setWidth(((pct_rect.width() * value) / 100.0) + 0.5); + painter->setPen(Qt::NoPen); + painter->setBrush(bar_color); + painter->drawRoundedRect(pct_rect, border_radius, border_radius); + painter->restore(); + + painter->save(); + painter->setPen(text_color); + painter->drawText(option.rect, Qt::AlignCenter, pct_str); + painter->restore(); +} + +QSize PercentBarDelegate::sizeHint(const QStyleOptionViewItem &option, + const QModelIndex &index) const +{ + return QSize(option.fontMetrics.height() * bar_em_width_, + QStyledItemDelegate::sizeHint(option, index).height()); +} |