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());
+}