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/*
* SPDX-FileCopyrightText: 2017 Kai Uwe Broulik <[email protected]>
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "middleclickactioneventfilter.h"
#include <QAction>
#include <QActionEvent>
#include <QEvent>
#include <QMenu>
#include <QMouseEvent>
#include <QToolBar>
MiddleClickActionEventFilter::MiddleClickActionEventFilter(QObject *parent)
: QObject(parent)
{
}
MiddleClickActionEventFilter::~MiddleClickActionEventFilter() = default;
bool MiddleClickActionEventFilter::eventFilter(QObject *watched, QEvent *event)
{
if (event->type() == QEvent::MouseButtonPress || event->type() == QEvent::MouseButtonRelease) {
QMouseEvent *me = static_cast<QMouseEvent *>(event);
if (me->button() == Qt::MiddleButton) {
QToolBar *toolBar = qobject_cast<QToolBar *>(watched);
if (toolBar) {
QAction *action = toolBar->actionAt(me->pos());
if (action) {
if (event->type() == QEvent::MouseButtonPress) {
m_lastMiddlePressedAction = action;
} else if (event->type() == QEvent::MouseButtonRelease) {
if (m_lastMiddlePressedAction == action) {
Q_EMIT actionMiddleClicked(action);
}
m_lastMiddlePressedAction = nullptr;
}
}
}
QMenu *menu = qobject_cast<QMenu *>(watched);
if (menu) {
QAction *action = menu->actionAt(me->pos());
if (action) {
if (event->type() == QEvent::MouseButtonPress) {
m_lastMiddlePressedAction = action;
} else if (event->type() == QEvent::MouseButtonRelease) {
if (m_lastMiddlePressedAction == action) {
Q_EMIT actionMiddleClicked(action);
return true;
}
m_lastMiddlePressedAction = nullptr;
}
}
}
}
} else if (event->type() == QEvent::ActionChanged) {
// KXmlGui adds delayed popup menu's actions to its own context menu.
// In order for middle click to work, we need to somehow detect when the action is added
// on this menu and install the event filter on it.
// Visibility of the action changes when the menu shows in the menu for the first time,
// so we'll receive an ActionChanged event and use that.
auto *actionEvent = static_cast<QActionEvent *>(event);
const auto items = actionEvent->action()->associatedObjects();
for (auto *item : items) {
if (auto *menu = qobject_cast<QMenu *>(item)) {
if (menu != actionEvent->action()->parent()) { // Parent is the regular menu.
menu->installEventFilter(this);
}
}
}
}
return QObject::eventFilter(watched, event);
}
#include "moc_middleclickactioneventfilter.cpp"
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