forked from osmocom/wireshark
187 lines
4.2 KiB
C++
187 lines
4.2 KiB
C++
/* label_stack.cpp
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include <ui/qt/widgets/label_stack.h>
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#include <QContextMenuEvent>
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#include <QPainter>
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#include <QMouseEvent>
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#include <QStyleOption>
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#include <ui/qt/utils/color_utils.h>
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/* Temporary message timeouts */
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const int temporary_interval_ = 1000;
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const int temporary_msg_timeout_ = temporary_interval_ * 9;
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const int temporary_flash_timeout_ = temporary_interval_ / 5;
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const int num_flashes_ = 3;
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LabelStack::LabelStack(QWidget *parent) :
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QLabel(parent),
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temporary_ctx_(-1),
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shrinkable_(false)
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{
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#ifdef Q_OS_MAC
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setAttribute(Qt::WA_MacSmallSize, true);
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#endif
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fillLabel();
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connect(&temporary_timer_, &QTimer::timeout, this, &LabelStack::updateTemporaryStatus);
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}
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void LabelStack::setTemporaryContext(const int ctx) {
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temporary_ctx_ = ctx;
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}
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void LabelStack::fillLabel() {
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StackItem si;
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QString style_sheet;
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style_sheet =
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"QLabel {"
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" margin-left: 0.5em;";
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if (labels_.isEmpty()) {
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clear();
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return;
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}
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si = labels_.first();
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if (si.ctx == temporary_ctx_) {
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style_sheet += QString(
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" border-radius: 0.25em;"
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" background-color: %2;"
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)
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.arg(ColorUtils::warningBackground().name());
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}
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style_sheet += "}";
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if (styleSheet().size() != style_sheet.size()) {
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// Can be computationally expensive.
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setStyleSheet(style_sheet);
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}
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setText(si.text);
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}
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void LabelStack::pushText(const QString &text, int ctx) {
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popText(ctx);
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if (ctx == temporary_ctx_) {
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temporary_timer_.stop();
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temporary_epoch_.start();
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temporary_timer_.start(temporary_flash_timeout_);
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emit toggleTemporaryFlash(true);
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}
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StackItem si;
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si.text = text;
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si.ctx = ctx;
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labels_.prepend(si);
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fillLabel();
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}
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void LabelStack::setShrinkable(bool shrinkable)
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{
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shrinkable_ = shrinkable;
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int min_width = 0;
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if (shrinkable) {
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min_width = fontMetrics().height() * 5; // em-widths
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}
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setMinimumWidth(min_width);
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fillLabel();
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}
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void LabelStack::mousePressEvent(QMouseEvent *event)
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{
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if (event->button() == Qt::LeftButton)
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emit mousePressedAt(QPoint(event->globalPos()), Qt::LeftButton);
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}
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void LabelStack::mouseReleaseEvent(QMouseEvent *)
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{
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}
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void LabelStack::mouseDoubleClickEvent(QMouseEvent *)
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{
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}
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void LabelStack::mouseMoveEvent(QMouseEvent *)
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{
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}
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void LabelStack::contextMenuEvent(QContextMenuEvent *event)
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{
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emit mousePressedAt(QPoint(event->globalPos()), Qt::RightButton);
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}
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void LabelStack::paintEvent(QPaintEvent *event)
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{
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if (!shrinkable_) {
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QLabel::paintEvent(event);
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return;
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}
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QFrame::paintEvent(event);
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QString elided_text = fontMetrics().elidedText(text(), Qt::ElideMiddle, width());
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QPainter painter(this);
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QRect contents_rect = contentsRect();
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QStyleOption opt;
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contents_rect.adjust(margin(), margin(), -margin(), -margin());
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opt.initFrom(this);
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style()->drawItemText(&painter, contents_rect, alignment(), opt.palette,
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isEnabled(), elided_text, foregroundRole());
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}
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void LabelStack::popText(int ctx) {
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QMutableListIterator<StackItem> iter(labels_);
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while (iter.hasNext()) {
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if (iter.next().ctx == ctx) {
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iter.remove();
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break;
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}
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}
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fillLabel();
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}
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void LabelStack::updateTemporaryStatus() {
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if (temporary_epoch_.elapsed() >= temporary_msg_timeout_) {
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popText(temporary_ctx_);
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emit toggleTemporaryFlash(false);
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temporary_timer_.stop();
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} else {
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for (int i = (num_flashes_ * 2); i > 0; i--) {
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if (temporary_epoch_.elapsed() >= temporary_flash_timeout_ * i) {
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emit toggleTemporaryFlash(i % 2);
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break;
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}
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}
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}
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}
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/*
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* Editor modelines
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*
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* Local Variables:
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* c-basic-offset: 4
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* tab-width: 8
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* indent-tabs-mode: nil
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* End:
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*
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* ex: set shiftwidth=4 tabstop=8 expandtab:
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* :indentSize=4:tabSize=8:noTabs=true:
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*/
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