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/* label_stack.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/widgets/label_stack.h>
#include <QContextMenuEvent>
#include <QPainter>
#include <QMouseEvent>
#include <QStyleOption>
#include <ui/qt/utils/color_utils.h>
/* Temporary message timeouts */
const int temporary_interval_ = 1000;
const int temporary_msg_timeout_ = temporary_interval_ * 9;
const int temporary_flash_timeout_ = temporary_interval_ / 5;
const int num_flashes_ = 3;
LabelStack::LabelStack(QWidget *parent) :
QLabel(parent),
temporary_ctx_(-1),
shrinkable_(false)
{
#ifdef Q_OS_MAC
setAttribute(Qt::WA_MacSmallSize, true);
#endif
fillLabel();
connect(&temporary_timer_, &QTimer::timeout, this, &LabelStack::updateTemporaryStatus);
}
void LabelStack::setTemporaryContext(const int ctx) {
temporary_ctx_ = ctx;
}
void LabelStack::fillLabel() {
StackItem si;
QString style_sheet;
style_sheet =
"QLabel {"
" margin-left: 0.5em;";
if (labels_.isEmpty()) {
clear();
return;
}
si = labels_.first();
if (si.ctx == temporary_ctx_) {
style_sheet += QString(
" border-radius: 0.25em;"
" background-color: %2;"
)
.arg(ColorUtils::warningBackground().name());
}
style_sheet += "}";
if (styleSheet().size() != style_sheet.size()) {
// Can be computationally expensive.
setStyleSheet(style_sheet);
}
setText(si.text);
}
void LabelStack::pushText(const QString &text, int ctx) {
popText(ctx);
if (ctx == temporary_ctx_) {
temporary_timer_.stop();
temporary_epoch_.start();
temporary_timer_.start(temporary_flash_timeout_);
emit toggleTemporaryFlash(true);
}
StackItem si;
si.text = text;
si.ctx = ctx;
labels_.prepend(si);
fillLabel();
}
void LabelStack::setShrinkable(bool shrinkable)
{
shrinkable_ = shrinkable;
int min_width = 0;
if (shrinkable) {
min_width = fontMetrics().height() * 5; // em-widths
}
setMinimumWidth(min_width);
fillLabel();
}
void LabelStack::mousePressEvent(QMouseEvent *event)
{
if (event->button() == Qt::LeftButton) {
#if QT_VERSION >= QT_VERSION_CHECK(6, 0 ,0)
emit mousePressedAt(event->globalPosition().toPoint(), Qt::LeftButton);
#else
emit mousePressedAt(event->globalPos(), Qt::LeftButton);
#endif
}
}
void LabelStack::mouseReleaseEvent(QMouseEvent *)
{
}
void LabelStack::mouseDoubleClickEvent(QMouseEvent *)
{
}
void LabelStack::mouseMoveEvent(QMouseEvent *)
{
}
void LabelStack::contextMenuEvent(QContextMenuEvent *event)
{
emit mousePressedAt(QPoint(event->globalPos()), Qt::RightButton);
}
void LabelStack::paintEvent(QPaintEvent *event)
{
if (!shrinkable_) {
QLabel::paintEvent(event);
return;
}
QFrame::paintEvent(event);
QString elided_text = fontMetrics().elidedText(text(), Qt::ElideMiddle, width());
QPainter painter(this);
QRect contents_rect = contentsRect();
QStyleOption opt;
contents_rect.adjust(margin(), margin(), -margin(), -margin());
opt.initFrom(this);
style()->drawItemText(&painter, contents_rect, alignment(), opt.palette,
isEnabled(), elided_text, foregroundRole());
}
void LabelStack::popText(int ctx) {
QMutableListIterator<StackItem> iter(labels_);
while (iter.hasNext()) {
if (iter.next().ctx == ctx) {
iter.remove();
break;
}
}
fillLabel();
}
void LabelStack::updateTemporaryStatus() {
if (temporary_epoch_.elapsed() >= temporary_msg_timeout_) {
popText(temporary_ctx_);
emit toggleTemporaryFlash(false);
temporary_timer_.stop();
} else {
for (int i = (num_flashes_ * 2); i > 0; i--) {
if (temporary_epoch_.elapsed() >= temporary_flash_timeout_ * i) {
emit toggleTemporaryFlash(i % 2);
break;
}
}
}
}
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