/* stock_icon_tool_button.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/stock_icon_tool_button.h>

#include <ui/qt/utils/stock_icon.h>

#include <QApplication>
#include <QEvent>
#include <QMenu>
#include <QMouseEvent>

// We want nice icons that render correctly, and that are responsive
// when the user hovers and clicks them.
// Using setIcon renders correctly on normal and retina displays. It is
// not completely responsive, particularly on macOS.
// Calling setStyleSheet is responsive, but does not render correctly on
// retina displays: https://bugreports.qt.io/browse/QTBUG-36825
// Subclass QToolButton, which lets us catch events and set icons as needed.

StockIconToolButton::StockIconToolButton(QWidget * parent, QString stock_icon_name) :
    QToolButton(parent),
    leave_timer_(0)
{
    setStockIcon(stock_icon_name);
}

void StockIconToolButton::setIconMode(QIcon::Mode mode)
{
    QIcon mode_icon;
    QList<QIcon::State> states = QList<QIcon::State>() << QIcon::Off << QIcon::On;
    foreach (QIcon::State state, states) {
        foreach (QSize size, base_icon_.availableSizes(mode, state)) {
            mode_icon.addPixmap(base_icon_.pixmap(size, mode, state), mode, state);
        }
    }
    setIcon(mode_icon);
}

void StockIconToolButton::setStockIcon(QString icon_name)
{
    if (!icon_name.isEmpty()) {
        icon_name_ = icon_name;
    }
    if (icon_name_.isEmpty()) {
        return;
    }
    base_icon_ = StockIcon(icon_name_);
    setIconMode();
}

bool StockIconToolButton::event(QEvent *event)
{
    switch (event->type()) {
        case QEvent::Enter:
        if (isEnabled()) {
            setIconMode(QIcon::Active);
            if (leave_timer_ > 0) killTimer(leave_timer_);
            leave_timer_ = startTimer(leave_interval_);
        }
        break;
    case QEvent::MouseButtonPress:
        if (isEnabled()) {
            setIconMode(QIcon::Selected);
        }
        break;
    case QEvent::Leave:
        if (leave_timer_ > 0) killTimer(leave_timer_);
        leave_timer_ = 0;
        // Fall through
    case QEvent::MouseButtonRelease:
        setIconMode();
        break;
    case QEvent::Timer:
    {
        // We can lose QEvent::Leave, QEvent::HoverLeave and underMouse()
        // on macOS if a tooltip appears:
        // https://bugreports.qt.io/browse/QTBUG-46379
        // Work around the issue by periodically checking the mouse
        // position and scheduling a fake leave event when the mouse
        // moves away.
        QTimerEvent *te = (QTimerEvent *) event;
        bool under_mouse = rect().contains(mapFromGlobal(QCursor::pos()));
        if (te->timerId() == leave_timer_ && !under_mouse) {
            killTimer(leave_timer_);
            leave_timer_ = 0;
            QMouseEvent *me = new QMouseEvent(QEvent::Leave, mapFromGlobal(QCursor::pos()), Qt::NoButton, Qt::NoButton, Qt::NoModifier);
            QApplication::postEvent(this, me);
        }
        break;
    }
    case QEvent::ApplicationPaletteChange:
        setStockIcon();
        break;
    default:
        break;
    }

    return QToolButton::event(event);
}

/*
 * Editor modelines
 *
 * Local Variables:
 * c-basic-offset: 4
 * tab-width: 8
 * indent-tabs-mode: nil
 * End:
 *
 * ex: set shiftwidth=4 tabstop=8 expandtab:
 * :indentSize=4:tabSize=8:noTabs=true:
 */