1 /* timeline_delegate.cpp
2 *
3 * Wireshark - Network traffic analyzer
4 * By Gerald Combs <gerald@wireshark.org>
5 * Copyright 1998 Gerald Combs
6 *
7 * SPDX-License-Identifier: GPL-2.0-or-later
8 */
9
10 #include <ui/qt/models/timeline_delegate.h>
11
12 #include <ui/qt/utils/color_utils.h>
13
14 #include <QApplication>
15 #include <QPainter>
16
17 // XXX We might want to move this to conversation_dialog.cpp.
18
19 // PercentBarDelegate uses a stronger blend value, but its bars are also
20 // more of a prominent feature. Make the blend weaker here so that we don't
21 // obscure our text.
22 static const double bar_blend_ = 0.08;
23
TimelineDelegate(QWidget * parent)24 TimelineDelegate::TimelineDelegate(QWidget *parent) :
25 QStyledItemDelegate(parent)
26 {}
27
paint(QPainter * painter,const QStyleOptionViewItem & option,const QModelIndex & index) const28 void TimelineDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option,
29 const QModelIndex &index) const
30 {
31 QStyleOptionViewItem option_vi = option;
32 QStyledItemDelegate::initStyleOption(&option_vi, index);
33
34 struct timeline_span span_px = index.data(Qt::UserRole).value<struct timeline_span>();
35
36 // Paint our rect with no text using the current style, then draw our
37 // bar and text over it.
38 QStyledItemDelegate::paint(painter, option, index);
39
40 if (QApplication::style()->objectName().contains("vista")) {
41 // QWindowsVistaStyle::drawControl does this internally. Unfortunately there
42 // doesn't appear to be a more general way to do this.
43 option_vi.palette.setColor(QPalette::All, QPalette::HighlightedText,
44 option_vi.palette.color(QPalette::Active, QPalette::Text));
45 }
46
47 QPalette::ColorGroup cg = option_vi.state & QStyle::State_Enabled
48 ? QPalette::Normal : QPalette::Disabled;
49 QColor text_color = option_vi.palette.color(cg, QPalette::Text);
50 QColor bar_color = ColorUtils::alphaBlend(option_vi.palette.windowText(),
51 option_vi.palette.window(), bar_blend_);
52
53 if (cg == QPalette::Normal && !(option_vi.state & QStyle::State_Active))
54 cg = QPalette::Inactive;
55 if (option_vi.state & QStyle::State_Selected) {
56 text_color = option_vi.palette.color(cg, QPalette::HighlightedText);
57 bar_color = ColorUtils::alphaBlend(option_vi.palette.color(cg, QPalette::Window),
58 option_vi.palette.color(cg, QPalette::Highlight),
59 bar_blend_);
60 }
61
62 painter->save();
63 int border_radius = 3; // We use 3 px elsewhere, e.g. filter combos.
64 QRect timeline_rect = option.rect;
65 timeline_rect.adjust(span_px.start, 1, 0, -1);
66 timeline_rect.setWidth(span_px.width);
67 painter->setClipRect(option.rect);
68 painter->setPen(Qt::NoPen);
69 painter->setBrush(bar_color);
70 painter->drawRoundedRect(timeline_rect, border_radius, border_radius);
71 painter->restore();
72
73 painter->save();
74 painter->setPen(text_color);
75 painter->drawText(option.rect, Qt::AlignCenter, index.data(Qt::DisplayRole).toString());
76 painter->restore();
77 }
78