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/*
This file is part of the KDE project
SPDX-FileCopyrightText: 2021 Felix Ernst <fe.a.ernst@gmail.com>
SPDX-License-Identifier: LGPL-2.1-only OR LGPL-3.0-only OR LicenseRef-KDE-Accepted-LGPL
*/
#include "khamburgermenuhelpers_p.h"
#include "khamburgermenu.h"
#include <QEvent>
#include <QGuiApplication>
#include <QMenu>
#include <QMenuBar>
#include <QToolBar>
#include <QToolButton>
#include <QWidget>
#include <QWindow>
ListenerContainer::ListenerContainer(KHamburgerMenuPrivate *hamburgerMenuPrivate)
: QObject{hamburgerMenuPrivate}
, m_listeners{std::vector<std::unique_ptr<QObject>>(4)}
{
}
ListenerContainer::~ListenerContainer()
{
}
bool AddOrRemoveActionListener::eventFilter(QObject * /*watched*/, QEvent *event)
{
if (event->type() == QEvent::ActionAdded || event->type() == QEvent::ActionRemoved) {
static_cast<KHamburgerMenuPrivate *>(parent())->notifyMenuResetNeeded();
}
return false;
}
void ButtonPressListener::prepareHamburgerButtonForPress(QObject *button)
{
Q_ASSERT(qobject_cast<QToolButton *>(button));
auto hamburgerMenuPrivate = static_cast<KHamburgerMenuPrivate *>(parent());
auto q = static_cast<KHamburgerMenu *>(hamburgerMenuPrivate->q_ptr);
Q_EMIT q->aboutToShowMenu();
hamburgerMenuPrivate->resetMenu(); // This menu never has a parent which can be
// problematic because it can lead to situations in which the QMenu itself is
// treated like its own window.
// To avoid this we set a sane transientParent() now even if it already has one
// because the menu might be opened from another window this time.
const auto watchedButton = static_cast<QToolButton *>(button);
auto menu = watchedButton->menu();
if (!menu) {
return;
}
prepareParentlessMenuForShowing(menu, watchedButton);
}
bool ButtonPressListener::eventFilter(QObject *watched, QEvent *event)
{
if (event->type() == QEvent::KeyPress || event->type() == QEvent::MouseButtonPress) {
prepareHamburgerButtonForPress(watched);
}
return false;
}
bool VisibleActionsChangeListener::eventFilter(QObject *watched, QEvent *event)
{
if (event->type() == QEvent::Show || event->type() == QEvent::Hide) {
if (!event->spontaneous()) {
static_cast<KHamburgerMenuPrivate *>(parent())->notifyMenuResetNeeded();
}
} else if (event->type() == QEvent::ActionAdded || event->type() == QEvent::ActionRemoved) {
Q_ASSERT_X(qobject_cast<QWidget *>(watched), "VisibileActionsChangeListener", "The watched QObject is expected to be a QWidget.");
if (static_cast<QWidget *>(watched)->isVisible()) {
static_cast<KHamburgerMenuPrivate *>(parent())->notifyMenuResetNeeded();
}
}
return false;
}
bool VisibilityChangesListener::eventFilter(QObject * /*watched*/, QEvent *event)
{
if (event->type() == QEvent::Show || event->type() == QEvent::Hide) {
if (!event->spontaneous()) {
static_cast<KHamburgerMenuPrivate *>(parent())->updateVisibility();
}
}
return false;
}
bool isMenuBarVisible(const QMenuBar *menuBar)
{
return menuBar && (menuBar->isVisible() && !menuBar->isNativeMenuBar());
}
bool isWidgetActuallyVisible(const QWidget *widget)
{
Q_CHECK_PTR(widget);
if (widget->width() < 1 || widget->height() < 1) {
return false;
}
bool actuallyVisible = widget->isVisible();
const QWidget *ancestorWidget = widget->parentWidget();
while (actuallyVisible && ancestorWidget) {
actuallyVisible = ancestorWidget->isVisible();
ancestorWidget = ancestorWidget->parentWidget();
}
return actuallyVisible;
}
void prepareParentlessMenuForShowing(QMenu *menu, const QWidget *surrogateParent)
{
Q_CHECK_PTR(menu);
// ensure polished so the style can change the surfaceformat of the window which is
// not possible once the window has been created
menu->ensurePolished();
menu->winId(); // trigger being a native widget already, to ensure windowHandle created
// generic code if not known if the available parent widget is a native widget or not
if (surrogateParent) {
auto parentWindowHandle = surrogateParent->windowHandle();
if (!parentWindowHandle) {
parentWindowHandle = surrogateParent->nativeParentWidget()->windowHandle();
}
menu->windowHandle()->setTransientParent(parentWindowHandle);
return;
}
menu->windowHandle()->setTransientParent(qGuiApp->focusWindow());
// Worst case: The menu's transientParent is now still nullptr in which case it might open as
// its own window.
}
void setToolButtonVisible(QWidget *toolButton, bool visible)
{
toolButton->setVisible(visible);
// setVisible() unfortunately has no effect for QWidgetActions on toolbars,
// so we work around this by using setMaximumSize().
if (qobject_cast<QToolBar *>(toolButton->parent())) {
if (visible) {
toolButton->setMaximumSize(QSize(9999999, 9999999));
toolButton->setFocusPolicy(Qt::TabFocus);
} else {
toolButton->setMaximumSize(QSize(0, 0));
toolButton->setFocusPolicy(Qt::NoFocus); // We don't want focus on invisible items.
}
}
}
bool listContainsWidget(const std::forward_list<QPointer<const QWidget>> &list, const QWidget *widget)
{
for (const auto &item : list) {
if (widget == item) {
return true;
}
}
return false;
}
#include "moc_khamburgermenuhelpers_p.cpp"
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