qt/qtbase/src/widgets/widgets/qmenubar.cpp

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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
// Qt-Security score:significant reason:default
#include <qmenubar.h>
#include <qstyle.h>
#include <qlayout.h>
#include <qapplication.h>
#if QT_CONFIG(accessibility)
# include <qaccessible.h>
#endif
#include <qpainter.h>
#include <qstylepainter.h>
#include <qevent.h>
#if QT_CONFIG(mainwindow)
#include <qmainwindow.h>
#endif
#if QT_CONFIG(toolbutton)
#include <qtoolbutton.h>
#endif
#if QT_CONFIG(whatsthis)
#include <qwhatsthis.h>
#endif
#include <qpa/qplatformtheme.h>
#include "private/qguiapplication_p.h"
#include "qpa/qplatformintegration.h"
#include "qmenu_p.h"
#include "qmenubar_p.h"
#include <private/qscreen_p.h>
#include <private/qstyle_p.h>
#include "qdebug.h"
QT_BEGIN_NAMESPACE
using namespace Qt::StringLiterals;
class QMenuBarExtension : public QToolButton
{
public:
explicit QMenuBarExtension(QWidget *parent);
QSize sizeHint() const override;
void paintEvent(QPaintEvent *) override;
};
QMenuBarExtension::QMenuBarExtension(QWidget *parent)
: QToolButton(parent)
{
setObjectName("qt_menubar_ext_button"_L1);
setAutoRaise(true);
#if QT_CONFIG(menu)
setPopupMode(QToolButton::InstantPopup);
#endif
setIcon(style()->standardIcon(QStyle::SP_ToolBarHorizontalExtensionButton, nullptr, parentWidget()));
}
void QMenuBarExtension::paintEvent(QPaintEvent *)
{
QStylePainter p(this);
QStyleOptionToolButton opt;
initStyleOption(&opt);
// We do not need to draw both extension arrows
opt.features &= ~QStyleOptionToolButton::HasMenu;
p.drawComplexControl(QStyle::CC_ToolButton, opt);
}
QSize QMenuBarExtension::sizeHint() const
{
int ext = style()->pixelMetric(QStyle::PM_ToolBarExtensionExtent, nullptr, parentWidget());
return QSize(ext, ext);
}
/*!
\internal
*/
QAction *QMenuBarPrivate::actionAt(QPoint p) const
{
for (auto *action : actions) {
if (actionRect(action).contains(p))
return action;
}
return nullptr;
}
QRect QMenuBarPrivate::menuRect(bool extVisible) const
{
Q_Q(const QMenuBar);
int hmargin = q->style()->pixelMetric(QStyle::PM_MenuBarPanelWidth, nullptr, q);
QRect result = q->rect();
result.adjust(hmargin, 0, -hmargin, 0);
if (extVisible) {
if (q->isRightToLeft())
result.setLeft(result.left() + extension->sizeHint().width());
else
result.setWidth(result.width() - extension->sizeHint().width());
}
if (leftWidget && leftWidget->isVisible()) {
QSize sz = leftWidget->sizeHint();
if (q->isRightToLeft())
result.setRight(result.right() - sz.width());
else
result.setLeft(result.left() + sz.width());
}
if (rightWidget && rightWidget->isVisible()) {
QSize sz = rightWidget->sizeHint();
if (q->isRightToLeft())
result.setLeft(result.left() + sz.width());
else
result.setRight(result.right() - sz.width());
}
return result;
}
bool QMenuBarPrivate::isVisible(QAction *action)
{
return !hiddenActions.contains(action);
}
void QMenuBarPrivate::updateGeometries()
{
Q_Q(QMenuBar);
if (!itemsDirty)
return;
int q_width = q->width()-(q->style()->pixelMetric(QStyle::PM_MenuBarPanelWidth, nullptr, q)*2);
int q_start = -1;
if (leftWidget || rightWidget) {
int vmargin = q->style()->pixelMetric(QStyle::PM_MenuBarVMargin, nullptr, q)
+ q->style()->pixelMetric(QStyle::PM_MenuBarPanelWidth, nullptr, q);
int hmargin = q->style()->pixelMetric(QStyle::PM_MenuBarHMargin, nullptr, q)
+ q->style()->pixelMetric(QStyle::PM_MenuBarPanelWidth, nullptr, q);
if (leftWidget && leftWidget->isVisible()) {
QSize sz = leftWidget->sizeHint();
q_width -= sz.width();
q_start = sz.width();
QPoint pos(hmargin, (q->height() - leftWidget->height()) / 2);
QRect vRect = QStyle::visualRect(q->layoutDirection(), q->rect(), QRect(pos, sz));
leftWidget->setGeometry(vRect);
}
if (rightWidget && rightWidget->isVisible()) {
QSize sz = rightWidget->sizeHint();
q_width -= sz.width();
QPoint pos(q->width() - sz.width() - hmargin, vmargin);
QRect vRect = QStyle::visualRect(q->layoutDirection(), q->rect(), QRect(pos, sz));
rightWidget->setGeometry(vRect);
}
}
#ifdef Q_OS_MACOS
if (q->isNativeMenuBar()) {//nothing to see here folks, move along..
itemsDirty = false;
return;
}
#endif
calcActionRects(q_width, q_start);
currentAction = nullptr;
#ifndef QT_NO_SHORTCUT
if (itemsDirty) {
for (const auto shortcutId : std::as_const(shortcutIndexMap))
q->releaseShortcut(shortcutId);
shortcutIndexMap.clear();
shortcutIndexMap.reserve(actions.size());
for (const auto *action : std::as_const(actions))
shortcutIndexMap.append(q->grabShortcut(QKeySequence::mnemonic(action->text())));
}
#endif
itemsDirty = false;
hiddenActions.clear();
//this is the menu rectangle without any extension
QRect menuRect = this->menuRect(false);
//we try to see if the actions will fit there
bool hasHiddenActions = false;
for (const auto &rect : std::as_const(actionRects)) {
if (rect.isValid() && !menuRect.contains(rect)) {
hasHiddenActions = true;
break;
}
}
//...and if not, determine the ones that fit on the menu with the extension visible
if (hasHiddenActions) {
menuRect = this->menuRect(true);
for (qsizetype i = 0; i < actions.size(); ++i) {
const QRect &rect = actionRects.at(i);
if (rect.isValid() && !menuRect.contains(rect)) {
hiddenActions.append(actions.at(i));
}
}
}
if (hiddenActions.size() > 0) {
QMenu *pop = extension->menu();
if (!pop) {
pop = new QMenu(q);
extension->setMenu(pop);
}
pop->clear();
pop->addActions(hiddenActions);
int vmargin = q->style()->pixelMetric(QStyle::PM_MenuBarVMargin, nullptr, q);
int x = q->isRightToLeft()
? menuRect.left() - extension->sizeHint().width() + 1
: menuRect.right();
extension->setGeometry(x, vmargin, extension->sizeHint().width(), menuRect.height() - vmargin*2);
extension->show();
} else {
extension->hide();
}
q->updateGeometry();
}
QRect QMenuBarPrivate::actionRect(QAction *act) const
{
const qsizetype index = actions.indexOf(act);
//makes sure the geometries are up-to-date
const_cast<QMenuBarPrivate*>(this)->updateGeometries();
if (index < 0 || index >= actionRects.size())
return QRect(); // that can happen in case of native menubar
return actionRects.at(index);
}
void QMenuBarPrivate::focusFirstAction()
{
if (!currentAction) {
updateGeometries();
qsizetype index = 0;
while (index < actions.size() && actionRects.at(index).isNull()) ++index;
if (index < actions.size())
setCurrentAction(actions.at(index));
}
}
void QMenuBarPrivate::setKeyboardMode(bool b)
{
Q_Q(QMenuBar);
if (b && !q->style()->styleHint(QStyle::SH_MenuBar_AltKeyNavigation, nullptr, q)) {
setCurrentAction(nullptr);
return;
}
keyboardState = b;
if (b) {
QWidget *fw = QApplication::focusWidget();
if (fw && fw != q && fw->window() != QApplication::activePopupWidget())
keyboardFocusWidget = fw;
focusFirstAction();
q->setFocus(Qt::MenuBarFocusReason);
} else {
if (!popupState)
setCurrentAction(nullptr);
if (keyboardFocusWidget) {
if (QApplication::focusWidget() == q)
keyboardFocusWidget->setFocus(Qt::MenuBarFocusReason);
keyboardFocusWidget = nullptr;
}
}
q->update();
}
void QMenuBarPrivate::popupAction(QAction *action, bool activateFirst)
{
Q_Q(QMenuBar);
if (!action || !action->menu() || closePopupMode)
return;
popupState = true;
if (action->isEnabled() && action->menu()->isEnabled()) {
closePopupMode = 0;
activeMenu = action->menu();
auto *activeMenuPriv = activeMenu->d_func();
activeMenuPriv->causedPopup.widget = q;
activeMenuPriv->causedPopup.action = action;
QRect adjustedActionRect = actionRect(action);
QPoint popupPos = adjustedActionRect.bottomLeft() + QPoint(0, 1);
//we put the popup menu on the screen containing the bottom-center of the action rect
QScreen *menubarScreen = q->window()->windowHandle()->screen();
QPoint screenTestPos = q->mapToGlobal(popupPos + QPoint(adjustedActionRect.width() / 2, 0));
QPointer<QScreen> popupScreen = menubarScreen->virtualSiblingAt(screenTestPos);
if (!popupScreen)
popupScreen = menubarScreen;
std::swap(popupScreen, activeMenuPriv->popupScreen);
const QSize popup_size = activeMenu->sizeHint();
std::swap(popupScreen, activeMenuPriv->popupScreen);
// Use screenTestPos.y() for the popup y position. This is the correct global y
// consistent with the selected screen in cases where the action rect spans
// multiple screens with different scale factors.
QPoint pos(q->mapToGlobal(popupPos).x(), screenTestPos.y());
QRect screenRect = QStylePrivate::useFullScreenForPopup()
? popupScreen->geometry()
: popupScreen->availableGeometry();
pos = QPoint(qMax(pos.x(), screenRect.x()), qMax(pos.y(), screenRect.y()));
const bool fitUp = (pos.y() - popup_size.height() >= screenRect.top());
const bool fitDown = (pos.y() + popup_size.height() <= screenRect.bottom());
const bool rtl = q->isRightToLeft();
const int actionWidth = adjustedActionRect.width();
if (!fitUp && !fitDown) { //we should shift the menu
bool shouldShiftToRight = !rtl;
if (rtl && popup_size.width() > pos.x())
shouldShiftToRight = true;
else if (actionWidth + popup_size.width() + pos.x() > screenRect.right())
shouldShiftToRight = false;
if (shouldShiftToRight) {
pos.rx() += actionWidth + (rtl ? popup_size.width() : 0);
} else {
//shift to left
if (!rtl)
pos.rx() -= popup_size.width();
}
} else if (rtl) {
pos.rx() += actionWidth;
}
if (!defaultPopDown || (fitUp && !fitDown))
pos.setY(qMax(screenRect.y(), q->mapToGlobal(QPoint(0, adjustedActionRect.top()-popup_size.height())).y()));
QMenuPrivate::get(activeMenu)->topData()->initialScreen = popupScreen;
activeMenu->popup(pos);
if (activateFirst)
activeMenu->d_func()->setFirstActionActive();
}
q->update(actionRect(action));
}
void QMenuBarPrivate::setCurrentAction(QAction *action, bool popup, bool activateFirst)
{
if (currentAction == action && popup == popupState)
return;
autoReleaseTimer.stop();
doChildEffects = (popup && !activeMenu);
Q_Q(QMenuBar);
QWidget *fw = nullptr;
if (QMenu *menu = activeMenu) {
activeMenu = nullptr;
hoverAction = nullptr;
if (popup) {
fw = q->window()->focusWidget();
q->setFocus(Qt::NoFocusReason);
}
menu->hide();
}
if (currentAction)
q->update(actionRect(currentAction));
popupState = popup;
#if QT_CONFIG(statustip)
QAction *previousAction = currentAction;
#endif
currentAction = action;
if (action && action->isEnabled()) {
activateAction(action, QAction::Hover);
if (popup)
popupAction(action, activateFirst);
q->update(actionRect(action));
#if QT_CONFIG(statustip)
} else if (previousAction) {
QString empty;
QStatusTipEvent tip(empty);
QCoreApplication::sendEvent(q, &tip);
#endif
}
if (fw)
fw->setFocus(Qt::NoFocusReason);
}
void QMenuBarPrivate::calcActionRects(int max_width, int start) const
{
Q_Q(const QMenuBar);
if (!itemsDirty)
return;
//let's reinitialize the buffer
actionRects.resize(actions.size());
actionRects.fill(QRect());
const QStyle *style = q->style();
const int itemSpacing = style->pixelMetric(QStyle::PM_MenuBarItemSpacing, nullptr, q);
int max_item_height = 0, separator = -1, separator_start = 0, separator_len = 0;
//calculate size
const QFontMetrics fm = q->fontMetrics();
const int hmargin = style->pixelMetric(QStyle::PM_MenuBarHMargin, nullptr, q),
vmargin = style->pixelMetric(QStyle::PM_MenuBarVMargin, nullptr, q),
icone = style->pixelMetric(QStyle::PM_SmallIconSize, nullptr, q);
for (qsizetype i = 0; i < actions.size(); ++i) {
const QAction *action = actions.at(i);
if (!action->isVisible())
continue;
QSize sz;
//calc what I think the size is..
if (action->isSeparator()) {
if (style->styleHint(QStyle::SH_DrawMenuBarSeparator, nullptr, q))
separator = i;
continue; //we don't really position these!
} else {
const QString s = action->text();
QIcon is = action->icon();
// If an icon is set, only the icon is visible
if (!is.isNull())
sz = sz.expandedTo(QSize(icone, icone));
else if (!s.isEmpty())
sz = fm.size(Qt::TextShowMnemonic, s);
}
//let the style modify the above size..
QStyleOptionMenuItemV2 opt;
q->initStyleOption(&opt, action);
sz = q->style()->sizeFromContents(QStyle::CT_MenuBarItem, &opt, sz, q);
if (!sz.isEmpty()) {
{ //update the separator state
int iWidth = sz.width() + itemSpacing;
if (separator == -1)
separator_start += iWidth;
else
separator_len += iWidth;
}
//maximum height
max_item_height = qMax(max_item_height, sz.height());
//append
actionRects[i] = QRect(0, 0, sz.width(), sz.height());
}
}
//calculate position
const int fw = q->style()->pixelMetric(QStyle::PM_MenuBarPanelWidth, nullptr, q);
int x = fw + ((start == -1) ? hmargin : start) + itemSpacing;
int y = fw + vmargin;
for (qsizetype i = 0; i < actionRects.size(); ++i) {
QRect &rect = actionRects[i];
if (rect.isNull())
continue;
//resize
rect.setHeight(max_item_height);
//move
if (separator != -1 && i >= separator) { //after the separator
int left = (max_width - separator_len - hmargin - itemSpacing) + (x - separator_start - hmargin);
if (left < separator_start) { //wrap
separator_start = x = hmargin;
y += max_item_height;
}
rect.moveLeft(left);
} else {
rect.moveLeft(x);
}
rect.moveTop(y);
//keep moving along..
x += rect.width() + itemSpacing;
//make sure we follow the layout direction
rect = QStyle::visualRect(q->layoutDirection(), q->rect(), rect);
}
}
void QMenuBarPrivate::activateAction(QAction *action, QAction::ActionEvent action_e)
{
Q_Q(QMenuBar);
if (!action || !action->isEnabled())
return;
action->activate(action_e);
if (action_e == QAction::Hover)
action->showStatusText(q);
// if (action_e == QAction::Trigger)
// emit q->activated(action);
// else if (action_e == QAction::Hover)
// emit q->highlighted(action);
}
void QMenuBarPrivate::_q_actionTriggered()
{
Q_Q(QMenuBar);
if (QAction *action = qobject_cast<QAction *>(q->sender())) {
emit q->triggered(action);
}
}
void QMenuBarPrivate::_q_actionHovered()
{
Q_Q(QMenuBar);
if (QAction *action = qobject_cast<QAction *>(q->sender())) {
emit q->hovered(action);
#if QT_CONFIG(accessibility)
if (QAccessible::isActive()) {
int actionIndex = actions.indexOf(action);
QAccessibleEvent focusEvent(q, QAccessible::Focus);
focusEvent.setChild(actionIndex);
QAccessible::updateAccessibility(&focusEvent);
}
#endif // QT_CONFIG(accessibility)
}
}
/*!
Initialize \a option with the values from the menu bar and information from \a action. This method
is useful for subclasses when they need a QStyleOptionMenuItem, but don't want
to fill in all the information themselves.
\sa QStyleOption::initFrom(), QMenu::initStyleOption()
*/
void QMenuBar::initStyleOption(QStyleOptionMenuItem *option, const QAction *action) const
{
if (!option || !action)
return;
Q_D(const QMenuBar);
option->palette = palette();
option->state = QStyle::State_None;
if (isEnabled() && action->isEnabled())
option->state |= QStyle::State_Enabled;
else
option->palette.setCurrentColorGroup(QPalette::Disabled);
option->fontMetrics = fontMetrics();
if (d->currentAction && d->currentAction == action) {
option->state |= QStyle::State_Selected;
if (d->popupState && !d->closePopupMode)
option->state |= QStyle::State_Sunken;
}
if (hasFocus() || d->currentAction)
option->state |= QStyle::State_HasFocus;
if (d->hoverAction == action) {
if (auto optionV2 = qstyleoption_cast<QStyleOptionMenuItemV2 *>(option))
optionV2->mouseDown = d->mouseDown;
option->state |= QStyle::State_MouseOver;
}
option->menuRect = rect();
option->menuItemType = QStyleOptionMenuItem::Normal;
option->checkType = QStyleOptionMenuItem::NotCheckable;
option->text = action->text();
option->icon = action->icon();
}
/*!
\class QMenuBar
\brief The QMenuBar class provides a horizontal menu bar.
\ingroup mainwindow-classes
\inmodule QtWidgets
A menu bar consists of a list of pull-down menu items. You add
menu items with addMenu(). For example, assuming that \c menubar
is a pointer to a QMenuBar and \c fileMenu is a pointer to a
QMenu, the following statement inserts the menu into the menu bar:
\snippet code/src_gui_widgets_qmenubar.cpp 0
The ampersand in the menu item's text sets Alt+F as a shortcut for
this menu. (You can use "\&\&" to get a real ampersand in the menu
bar.)
There is no need to lay out a menu bar. It automatically sets its
own geometry to the top of the parent widget and changes it
appropriately whenever the parent is resized.
\section1 Usage
In most main window style applications you would use the
\l{QMainWindow::}{menuBar()} function provided in QMainWindow,
adding \l{QMenu}s to the menu bar and adding \l{QAction}s to the
pop-up menus.
Example (from the \l{mainwindows/menus}{Menus} example):
\snippet mainwindows/menus/mainwindow.cpp 9
Menu items may be removed with removeAction().
Widgets can be added to menus by using instances of the QWidgetAction
class to hold them. These actions can then be inserted into menus
in the usual way; see the QMenu documentation for more details.
\section1 Platform Dependent Look and Feel
Different platforms have different requirements for the appearance
of menu bars and their behavior when the user interacts with them.
For example, Windows systems are often configured so that the
underlined character mnemonics that indicate keyboard shortcuts
for items in the menu bar are only shown when the \uicontrol{Alt} key is
pressed.
\section1 QMenuBar as a Global Menu Bar
On \macos and on certain Linux desktop environments such as
Ubuntu Unity, QMenuBar is a wrapper for using the system-wide menu bar.
If you have multiple menu bars in one dialog the outermost menu bar
(normally inside a widget with widget flag Qt::Window) will
be used for the system-wide menu bar.
Qt for \macos also provides a menu bar merging feature to make
QMenuBar conform more closely to accepted \macos menu bar layout.
If an entry is moved its slots will still fire as if it was in the
original place.
The merging functionality is based on the QAction::menuRole() of
the menu entries. If an item has QAction::TextHeuristicRole,
the role is determined by string matching the title using the
following heuristics:
\table
\header \li String matches \li Placement \li Notes
\row \li about.*
\li Application Menu | About <application name>
\li The application name is fetched from the \c {Info.plist} file
(see note below). If this entry is not found no About item
will appear in the Application Menu.
\row \li config, options, setup, settings or preferences
\li Application Menu | Preferences
\li If this entry is not found the Settings item will be disabled
\row \li quit or exit
\li Application Menu | Quit <application name>
\li If this entry is not found a default Quit item will be
created to call QCoreApplication::quit()
\endtable
You can override this behavior by setting the QAction::menuRole()
property to QAction::NoRole.
If you want all windows in a Mac application to share one menu
bar, you must create a menu bar that does not have a parent.
Create a parent-less menu bar this way:
\snippet code/src_gui_widgets_qmenubar.cpp 1
\b{Note:} Do \e{not} call QMainWindow::menuBar() to create the
shared menu bar, because that menu bar will have the QMainWindow
as its parent. That menu bar would only be displayed for the
parent QMainWindow.
\b{Note:} The text used for the application name in the \macos menu
bar is obtained from the value set in the \c{Info.plist} file in
the application's bundle. See \l{Qt for macOS - Deployment}
for more information.
\b{Note:} On Linux, if the com.canonical.AppMenu.Registrar
service is available on the D-Bus session bus, then Qt will
communicate with it to install the application's menus into the
global menu bar, as described.
\section1 Examples
The \l{mainwindows/menus}{Menus} example shows how to use QMenuBar
and QMenu. The other \l{Main Window Examples}{main window
application examples} also provide menus using these classes.
\sa QMenu, QShortcut, QAction,
{Menus Example}
*/
void QMenuBarPrivate::init()
{
Q_Q(QMenuBar);
q->setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::Minimum);
q->setAttribute(Qt::WA_CustomWhatsThis);
if (!QCoreApplication::testAttribute(Qt::AA_DontUseNativeMenuBar))
platformMenuBar = QGuiApplicationPrivate::platformTheme()->createPlatformMenuBar();
if (platformMenuBar)
q->hide();
q->setBackgroundRole(QPalette::Button);
handleReparent();
q->setMouseTracking(q->style()->styleHint(QStyle::SH_MenuBar_MouseTracking, nullptr, q));
extension = new QMenuBarExtension(q);
extension->setFocusPolicy(Qt::NoFocus);
extension->hide();
}
//Gets the next action for keyboard navigation
QAction *QMenuBarPrivate::getNextAction(const qsizetype _start, const qsizetype increment) const
{
Q_Q(const QMenuBar);
const_cast<QMenuBarPrivate*>(this)->updateGeometries();
bool allowActiveAndDisabled = q->style()->styleHint(QStyle::SH_Menu_AllowActiveAndDisabled, nullptr, q);
const qsizetype start = (_start == -1 && increment == -1) ? actions.size() : _start;
const qsizetype end = increment == -1 ? 0 : actions.size() - 1;
for (qsizetype i = start; i != end;) {
i += increment;
QAction *current = actions.at(i);
if (!actionRects.at(i).isNull() && (allowActiveAndDisabled || current->isEnabled()))
return current;
}
if (_start != -1) //let's try from the beginning or the end
return getNextAction(-1, increment);
return nullptr;
}
/*!
Constructs a menu bar with parent \a parent.
*/
QMenuBar::QMenuBar(QWidget *parent) : QWidget(*new QMenuBarPrivate, parent, { })
{
Q_D(QMenuBar);
d->init();
}
/*!
Destroys the menu bar.
*/
QMenuBar::~QMenuBar()
{
Q_D(QMenuBar);
delete d->platformMenuBar;
d->platformMenuBar = nullptr;
}
/*!
Appends a new QMenu with \a title to the menu bar. The menu bar
takes ownership of the menu. Returns the new menu.
\sa QWidget::addAction(), QMenu::menuAction()
*/
QMenu *QMenuBar::addMenu(const QString &title)
{
QMenu *menu = new QMenu(title, this);
addAction(menu->menuAction());
return menu;
}
/*!
Appends a new QMenu with \a icon and \a title to the menu bar. The menu bar
takes ownership of the menu. Returns the new menu.
\sa QWidget::addAction(), QMenu::menuAction()
*/
QMenu *QMenuBar::addMenu(const QIcon &icon, const QString &title)
{
QMenu *menu = new QMenu(title, this);
menu->setIcon(icon);
addAction(menu->menuAction());
return menu;
}
/*!
Appends \a menu to the menu bar. Returns the menu's menuAction(). The menu bar
does not take ownership of the menu.
\note The returned QAction object can be used to hide the corresponding
menu.
\sa QWidget::addAction(), QMenu::menuAction()
*/
QAction *QMenuBar::addMenu(QMenu *menu)
{
QAction *action = menu->menuAction();
addAction(action);
return action;
}
/*!
Appends a separator to the menu.
*/
QAction *QMenuBar::addSeparator()
{
QAction *ret = new QAction(this);
ret->setSeparator(true);
addAction(ret);
return ret;
}
/*!
This convenience function creates a new separator action, i.e. an
action with QAction::isSeparator() returning true. The function inserts
the newly created action into this menu bar's list of actions before
action \a before and returns it.
\sa QWidget::insertAction(), addSeparator()
*/
QAction *QMenuBar::insertSeparator(QAction *before)
{
QAction *action = new QAction(this);
action->setSeparator(true);
insertAction(before, action);
return action;
}
/*!
This convenience function inserts \a menu before action \a before
and returns the menus menuAction().
\sa QWidget::insertAction(), addMenu()
*/
QAction *QMenuBar::insertMenu(QAction *before, QMenu *menu)
{
QAction *action = menu->menuAction();
insertAction(before, action);
return action;
}
/*!
Returns the QAction that is currently highlighted, if any,
else \nullptr.
*/
QAction *QMenuBar::activeAction() const
{
Q_D(const QMenuBar);
return d->currentAction;
}
/*!
\since 4.1
Sets the currently highlighted action to \a act.
*/
void QMenuBar::setActiveAction(QAction *act)
{
Q_D(QMenuBar);
d->setCurrentAction(act, true, false);
}
/*!
Removes all the actions from the menu bar.
\note On \macos, menu items that have been merged to the system
menu bar are not removed by this function. One way to handle this
would be to remove the extra actions yourself. You can set the
\l{QAction::MenuRole}{menu role} on the different menus, so that
you know ahead of time which menu items get merged and which do
not. Then decide what to recreate or remove yourself.
\sa removeAction()
*/
void QMenuBar::clear()
{
const auto acts = actions();
for (const auto &act : acts)
removeAction(act);
}
/*!
\property QMenuBar::defaultUp
\brief the popup orientation
The default popup orientation. By default, menus pop "down" the
screen. By setting the property to true, the menu will pop "up".
You might call this for menus that are \e below the document to
which they refer.
If the menu would not fit on the screen, the other direction is
used automatically.
*/
void QMenuBar::setDefaultUp(bool b)
{
Q_D(QMenuBar);
d->defaultPopDown = !b;
}
bool QMenuBar::isDefaultUp() const
{
Q_D(const QMenuBar);
return !d->defaultPopDown;
}
/*!
\reimp
*/
void QMenuBar::resizeEvent(QResizeEvent *)
{
Q_D(QMenuBar);
d->itemsDirty = true;
d->updateGeometries();
}
/*!
\reimp
*/
void QMenuBar::paintEvent(QPaintEvent *e)
{
Q_D(QMenuBar);
QPainter p(this);
QRegion emptyArea(rect());
//draw the items
for (int i = 0; i < d->actions.size(); ++i) {
QAction *action = d->actions.at(i);
QRect adjustedActionRect = d->actionRect(action);
if (adjustedActionRect.isEmpty() || !d->isVisible(action))
continue;
if (!e->rect().intersects(adjustedActionRect))
continue;
emptyArea -= adjustedActionRect;
QStyleOptionMenuItemV2 opt;
initStyleOption(&opt, action);
opt.rect = adjustedActionRect;
p.setClipRect(adjustedActionRect);
style()->drawControl(QStyle::CE_MenuBarItem, &opt, &p, this);
}
//draw border
if (int fw = style()->pixelMetric(QStyle::PM_MenuBarPanelWidth, nullptr, this)) {
QRegion borderReg;
borderReg += QRect(0, 0, fw, height()); //left
borderReg += QRect(width()-fw, 0, fw, height()); //right
borderReg += QRect(0, 0, width(), fw); //top
borderReg += QRect(0, height()-fw, width(), fw); //bottom
p.setClipRegion(borderReg);
emptyArea -= borderReg;
QStyleOptionFrame frame;
frame.rect = rect();
frame.palette = palette();
frame.state = QStyle::State_None;
frame.lineWidth = style()->pixelMetric(QStyle::PM_MenuBarPanelWidth, &frame, this);
frame.midLineWidth = 0;
style()->drawPrimitive(QStyle::PE_PanelMenuBar, &frame, &p, this);
}
p.setClipRegion(emptyArea);
QStyleOptionMenuItem menuOpt;
menuOpt.palette = palette();
menuOpt.state = QStyle::State_None;
menuOpt.menuItemType = QStyleOptionMenuItem::EmptyArea;
menuOpt.checkType = QStyleOptionMenuItem::NotCheckable;
menuOpt.rect = rect();
menuOpt.menuRect = rect();
style()->drawControl(QStyle::CE_MenuBarEmptyArea, &menuOpt, &p, this);
}
/*!
\reimp
*/
void QMenuBar::setVisible(bool visible)
{
if (isNativeMenuBar()) {
if (!visible)
QWidget::setVisible(false);
return;
}
QWidget::setVisible(visible);
}
/*!
\reimp
*/
void QMenuBar::mousePressEvent(QMouseEvent *e)
{
Q_D(QMenuBar);
if (e->button() != Qt::LeftButton)
return;
d->mouseDown = true;
QAction *action = d->actionAt(e->position().toPoint());
if (!action || !d->isVisible(action) || !action->isEnabled()) {
d->setCurrentAction(nullptr);
#if QT_CONFIG(whatsthis)
if (QWhatsThis::inWhatsThisMode())
QWhatsThis::showText(e->globalPosition().toPoint(), d->whatsThis, this);
#endif
return;
}
if (d->currentAction == action && d->popupState) {
if (QMenu *menu = d->activeMenu) {
d->activeMenu = nullptr;
menu->setAttribute(Qt::WA_NoMouseReplay);
menu->hide();
grabMouse(); // otherwise we don't get the corresponding mouseReleaseEvent...
}
} else {
d->setCurrentAction(action, true);
}
d->hoverAction = action;
update(d->actionRect(d->hoverAction));
}
/*!
\reimp
*/
void QMenuBar::mouseReleaseEvent(QMouseEvent *e)
{
Q_D(QMenuBar);
if (e->button() != Qt::LeftButton)
return;
releaseMouse();
d->mouseDown = false;
QAction *action = d->actionAt(e->position().toPoint());
// do noting if the action is hidden
if (!d->isVisible(action))
return;
if ((d->closePopupMode && action == d->currentAction) || !action || !action->menu()) {
//we set the current action before activating
//so that we let the leave event set the current back to 0
d->setCurrentAction(action, false);
if (action)
d->activateAction(action, QAction::Trigger);
}
d->closePopupMode = 0;
d->hoverAction = action;
update(d->actionRect(d->hoverAction));
}
/*!
\reimp
*/
void QMenuBar::keyPressEvent(QKeyEvent *e)
{
Q_D(QMenuBar);
d->updateGeometries();
int key = e->key();
if (isRightToLeft()) { // in reverse mode open/close key for submenues are reversed
if (key == Qt::Key_Left)
key = Qt::Key_Right;
else if (key == Qt::Key_Right)
key = Qt::Key_Left;
}
if (key == Qt::Key_Tab) //means right
key = Qt::Key_Right;
else if (key == Qt::Key_Backtab) //means left
key = Qt::Key_Left;
bool key_consumed = false;
switch(key) {
case Qt::Key_Up:
case Qt::Key_Down:
case Qt::Key_Enter:
case Qt::Key_Space:
case Qt::Key_Return: {
if (!style()->styleHint(QStyle::SH_MenuBar_AltKeyNavigation, nullptr, this) || !d->currentAction)
break;
if (d->currentAction->menu()) {
d->popupAction(d->currentAction, true);
} else if (key == Qt::Key_Enter || key == Qt::Key_Return || key == Qt::Key_Space) {
d->activateAction(d->currentAction, QAction::Trigger);
d->setCurrentAction(d->currentAction, false);
d->setKeyboardMode(false);
}
key_consumed = true;
break; }
case Qt::Key_Right:
case Qt::Key_Left: {
if (d->currentAction) {
qsizetype index = d->actions.indexOf(d->currentAction);
if (QAction *nextAction = d->getNextAction(index, key == Qt::Key_Left ? -1 : +1)) {
d->setCurrentAction(nextAction, d->popupState, true);
key_consumed = true;
}
}
break; }
default:
key_consumed = false;
}
#ifndef QT_NO_SHORTCUT
if (!key_consumed && e->matches(QKeySequence::Cancel)) {
d->setCurrentAction(nullptr);
d->setKeyboardMode(false);
key_consumed = true;
}
#endif
if (!key_consumed &&
(!e->modifiers() ||
(e->modifiers()&(Qt::MetaModifier|Qt::AltModifier))) && e->text().size()==1 && !d->popupState) {
int clashCount = 0;
QAction *first = nullptr, *currentSelected = nullptr, *firstAfterCurrent = nullptr;
{
const QChar c = e->text().at(0).toUpper();
for (qsizetype i = 0; i < d->actions.size(); ++i) {
if (d->actionRects.at(i).isNull())
continue;
QAction *act = d->actions.at(i);
QString s = act->text();
if (!s.isEmpty()) {
qsizetype ampersand = s.indexOf(u'&');
if (ampersand >= 0) {
if (s[ampersand+1].toUpper() == c) {
clashCount++;
if (!first)
first = act;
if (act == d->currentAction)
currentSelected = act;
else if (!firstAfterCurrent && currentSelected)
firstAfterCurrent = act;
}
}
}
}
}
QAction *next_action = nullptr;
if (clashCount >= 1) {
if (clashCount == 1 || !d->currentAction || (currentSelected && !firstAfterCurrent))
next_action = first;
else
next_action = firstAfterCurrent;
}
if (next_action) {
key_consumed = true;
d->setCurrentAction(next_action, true, true);
}
}
if (key_consumed)
e->accept();
else
e->ignore();
}
/*!
\reimp
*/
void QMenuBar::mouseMoveEvent(QMouseEvent *e)
{
Q_D(QMenuBar);
if (!(e->buttons() & Qt::LeftButton)) {
d->mouseDown = false;
// We receive mouse move and mouse press on touch.
// Mouse move will open the menu and mouse press
// will close it, so ignore mouse move.
if (e->source() != Qt::MouseEventNotSynthesized)
return;
}
bool popupState = d->popupState || d->mouseDown;
QAction *action = d->actionAt(e->position().toPoint());
QAction *oldHoverAction = d->hoverAction;
if ((action && d->isVisible(action)) || !popupState)
d->setCurrentAction(action, popupState);
if (oldHoverAction != action)
update(d->actionRect(oldHoverAction));
d->hoverAction = action;
}
/*!
\reimp
*/
void QMenuBar::leaveEvent(QEvent *)
{
Q_D(QMenuBar);
if ((!hasFocus() && !d->popupState) ||
(d->currentAction && d->currentAction->menu() == nullptr)) {
d->setCurrentAction(nullptr);
d->hoverAction = nullptr;
}
}
QPlatformMenu *QMenuBarPrivate::getPlatformMenu(const QAction *action)
{
if (!action || !action->menu())
return nullptr;
QPlatformMenu *platformMenu = action->menu()->platformMenu();
if (!platformMenu && platformMenuBar) {
platformMenu = platformMenuBar->createMenu();
if (platformMenu)
action->menu()->setPlatformMenu(platformMenu);
}
return platformMenu;
}
QPlatformMenu *QMenuBarPrivate::findInsertionPlatformMenu(const QAction *action)
{
Q_Q(QMenuBar);
QPlatformMenu *beforeMenu = nullptr;
for (qsizetype beforeIndex = indexOf(const_cast<QAction *>(action)) + 1;
!beforeMenu && (beforeIndex < q->actions().size());
++beforeIndex) {
beforeMenu = getPlatformMenu(q->actions().at(beforeIndex));
}
return beforeMenu;
}
void QMenuBarPrivate::copyActionToPlatformMenu(const QAction *action, QPlatformMenu *menu)
{
const auto tag = reinterpret_cast<quintptr>(action);
if (menu->tag() != tag)
menu->setTag(tag);
menu->setText(action->text());
menu->setVisible(action->isVisible());
menu->setEnabled(action->isEnabled());
}
/*!
\reimp
*/
void QMenuBar::actionEvent(QActionEvent *e)
{
Q_D(QMenuBar);
d->itemsDirty = true;
if (d->platformMenuBar) {
QPlatformMenuBar *nativeMenuBar = d->platformMenuBar;
if (!nativeMenuBar)
return;
auto action = static_cast<QAction *>(e->action());
if (e->type() == QEvent::ActionAdded) {
QPlatformMenu *menu = d->getPlatformMenu(action);
if (menu) {
d->copyActionToPlatformMenu(action, menu);
QPlatformMenu *beforeMenu = d->findInsertionPlatformMenu(action);
d->platformMenuBar->insertMenu(menu, beforeMenu);
}
} else if (e->type() == QEvent::ActionRemoved) {
QPlatformMenu *menu = d->getPlatformMenu(action);
if (menu)
d->platformMenuBar->removeMenu(menu);
} else if (e->type() == QEvent::ActionChanged) {
QPlatformMenu *cur = d->platformMenuBar->menuForTag(reinterpret_cast<quintptr>(e->action()));
QPlatformMenu *menu = d->getPlatformMenu(action);
// the menu associated with the action can change, need to
// remove and/or insert the new platform menu
if (menu != cur) {
if (cur)
d->platformMenuBar->removeMenu(cur);
if (menu) {
d->copyActionToPlatformMenu(action, menu);
QPlatformMenu *beforeMenu = d->findInsertionPlatformMenu(action);
d->platformMenuBar->insertMenu(menu, beforeMenu);
}
} else if (menu) {
d->copyActionToPlatformMenu(action, menu);
d->platformMenuBar->syncMenu(menu);
}
}
}
if (e->type() == QEvent::ActionAdded) {
connect(e->action(), SIGNAL(triggered()), this, SLOT(_q_actionTriggered()));
connect(e->action(), SIGNAL(hovered()), this, SLOT(_q_actionHovered()));
} else if (e->type() == QEvent::ActionRemoved) {
e->action()->disconnect(this);
}
// updateGeometries() is also needed for native menu bars because
// it updates shortcutIndexMap
if (isVisible() || isNativeMenuBar())
d->updateGeometries();
if (isVisible())
update();
}
/*!
\reimp
*/
void QMenuBar::focusInEvent(QFocusEvent *)
{
Q_D(QMenuBar);
if (d->keyboardState)
d->focusFirstAction();
}
/*!
\reimp
*/
void QMenuBar::focusOutEvent(QFocusEvent *)
{
Q_D(QMenuBar);
if (!d->popupState) {
d->setCurrentAction(nullptr);
d->setKeyboardMode(false);
}
}
/*!
\reimp
*/
void QMenuBar::timerEvent (QTimerEvent *e)
{
Q_D(QMenuBar);
if (e->timerId() == d->autoReleaseTimer.timerId()) {
d->autoReleaseTimer.stop();
d->setCurrentAction(nullptr);
}
QWidget::timerEvent(e);
}
void QMenuBarPrivate::handleReparent()
{
Q_Q(QMenuBar);
QWidget *newParent = q->parentWidget();
//Note: if parent is reparented, then window may change even if parent doesn't.
// We need to install an avent filter on each parent up to the parent that is
// also a window (for shortcuts)
QWidget *newWindow = newParent ? newParent->window() : nullptr;
QList<QPointer<QWidget>> newParents;
// Remove event filters on ex-parents, keep them on still-parents
// The parents are always ordered in the vector
//
// Take a copy because this method is called from changeEvent() and eventFilter(),
// which might cause recursion into the class due to event processing, which might
// modify oldParents.
const auto copy = oldParents;
for (const QPointer<QWidget> &w : copy) {
if (w) {
if (newParent == w) {
newParents.append(w);
if (newParent != newWindow) //stop at the window
newParent = newParent->parentWidget();
} else {
w->removeEventFilter(q);
}
}
}
// At this point, newParent is the next one to be added to newParents
while (newParent && newParent != newWindow) {
//install event filters all the way up to (excluding) the window
newParents.append(newParent);
newParent->installEventFilter(q);
newParent = newParent->parentWidget();
}
if (newParent && newWindow) {
// Install the event filter on the window
newParents.append(newParent);
newParent->installEventFilter(q);
}
oldParents = newParents;
if (platformMenuBar) {
if (newWindow) {
// force the underlying platform window to be created, since
// the platform menubar needs it (and we have no other way to
// discover when the platform window is created)
newWindow->createWinId();
platformMenuBar->handleReparent(newWindow->windowHandle());
} else {
platformMenuBar->handleReparent(nullptr);
}
}
}
/*!
\reimp
*/
void QMenuBar::changeEvent(QEvent *e)
{
Q_D(QMenuBar);
if (e->type() == QEvent::StyleChange) {
d->itemsDirty = true;
setMouseTracking(style()->styleHint(QStyle::SH_MenuBar_MouseTracking, nullptr, this));
if (parentWidget())
resize(parentWidget()->width(), heightForWidth(parentWidget()->width()));
d->updateGeometries();
} else if (e->type() == QEvent::ParentChange) {
d->handleReparent();
} else if (e->type() == QEvent::FontChange
|| e->type() == QEvent::ApplicationFontChange) {
d->itemsDirty = true;
d->updateGeometries();
}
QWidget::changeEvent(e);
}
/*!
\reimp
*/
bool QMenuBar::event(QEvent *e)
{
Q_D(QMenuBar);
switch (e->type()) {
case QEvent::KeyPress: {
QKeyEvent *ke = static_cast<QKeyEvent *>(e);
#if 0
if (!d->keyboardState) { //all keypresses..
d->setCurrentAction(0);
return ;
}
#endif
if (ke->key() == Qt::Key_Tab || ke->key() == Qt::Key_Backtab) {
keyPressEvent(ke);
return true;
}
} break;
#ifndef QT_NO_SHORTCUT
case QEvent::Shortcut: {
QShortcutEvent *se = static_cast<QShortcutEvent *>(e);
int shortcutId = se->shortcutId();
for (qsizetype j = 0; j < d->shortcutIndexMap.size(); ++j) {
if (shortcutId == d->shortcutIndexMap.value(j))
d->_q_internalShortcutActivated(j);
}
} break;
#endif
case QEvent::Show:
d->_q_updateLayout();
break;
#ifndef QT_NO_SHORTCUT
case QEvent::ShortcutOverride: {
QKeyEvent *kev = static_cast<QKeyEvent *>(e);
//we only filter out escape if there is a current action
if (kev->matches(QKeySequence::Cancel) && d->currentAction) {
e->accept();
return true;
}
}
break;
#endif
#if QT_CONFIG(whatsthis)
case QEvent::QueryWhatsThis:
e->setAccepted(d->whatsThis.size());
if (QAction *action = d->actionAt(static_cast<QHelpEvent*>(e)->pos())) {
if (action->whatsThis().size() || action->menu())
e->accept();
}
return true;
#endif
case QEvent::LayoutDirectionChange:
d->_q_updateLayout();
break;
default:
break;
}
return QWidget::event(e);
}
/*!
\reimp
*/
bool QMenuBar::eventFilter(QObject *object, QEvent *event)
{
Q_D(QMenuBar);
if (object && (event->type() == QEvent::ParentChange)) //GrandparentChange
d->handleReparent();
if (object == d->leftWidget || object == d->rightWidget) {
switch (event->type()) {
case QEvent::ShowToParent:
case QEvent::HideToParent:
d->_q_updateLayout();
break;
default:
break;
}
}
if (isNativeMenuBar() && event->type() == QEvent::ShowToParent) {
// On some desktops like Unity, the D-Bus menu bar is unregistered
// when the window is hidden. So when the window is shown, we need
// to forcefully re-register it. The only way to force re-registering
// with D-Bus menu is the handleReparent method.
QWidget *widget = qobject_cast<QWidget *>(object);
QWindow *handle = widget ? widget->windowHandle() : nullptr;
if (handle != nullptr)
d->platformMenuBar->handleReparent(handle);
}
if (style()->styleHint(QStyle::SH_MenuBar_AltKeyNavigation, nullptr, this)) {
if (d->altPressed) {
switch (event->type()) {
case QEvent::KeyPress:
case QEvent::KeyRelease:
{
QKeyEvent *kev = static_cast<QKeyEvent*>(event);
if (kev->key() == Qt::Key_Alt || kev->key() == Qt::Key_Meta) {
if (event->type() == QEvent::KeyPress) // Alt-press does not interest us, we have the shortcut-override event
break;
d->setKeyboardMode(!d->keyboardState);
}
}
Q_FALLTHROUGH();
case QEvent::MouseButtonPress:
case QEvent::MouseButtonRelease:
case QEvent::MouseMove:
case QEvent::FocusIn:
case QEvent::FocusOut:
case QEvent::ActivationChange:
case QEvent::Shortcut:
d->altPressed = false;
qApp->removeEventFilter(this);
break;
default:
break;
}
} else if (isVisible()) {
if (event->type() == QEvent::ShortcutOverride) {
QKeyEvent *kev = static_cast<QKeyEvent*>(event);
if ((kev->key() == Qt::Key_Alt || kev->key() == Qt::Key_Meta)
&& kev->modifiers() == Qt::AltModifier) {
d->altPressed = true;
qApp->installEventFilter(this);
}
}
}
}
return false;
}
/*!
Returns the QAction at \a pt. Returns \nullptr if there is no action at \a pt or if
the location has a separator.
\sa QWidget::addAction(), addSeparator()
*/
QAction *QMenuBar::actionAt(const QPoint &pt) const
{
Q_D(const QMenuBar);
return d->actionAt(pt);
}
/*!
Returns the geometry of action \a act as a QRect.
\sa actionAt()
*/
QRect QMenuBar::actionGeometry(QAction *act) const
{
Q_D(const QMenuBar);
return d->actionRect(act);
}
/*!
\reimp
*/
QSize QMenuBar::minimumSizeHint() const
{
Q_D(const QMenuBar);
const bool as_gui_menubar = !isNativeMenuBar();
ensurePolished();
QSize ret(0, 0);
const_cast<QMenuBarPrivate*>(d)->updateGeometries();
const int hmargin = style()->pixelMetric(QStyle::PM_MenuBarHMargin, nullptr, this);
const int vmargin = style()->pixelMetric(QStyle::PM_MenuBarVMargin, nullptr, this);
int fw = style()->pixelMetric(QStyle::PM_MenuBarPanelWidth, nullptr, this);
int spaceBelowMenuBar = style()->styleHint(QStyle::SH_MainWindow_SpaceBelowMenuBar, nullptr, this);
if (as_gui_menubar) {
int w = parentWidget() ? parentWidget()->width() : QGuiApplication::primaryScreen()->virtualGeometry().width();
d->calcActionRects(w - (2 * fw), 0);
for (qsizetype i = 0; ret.isNull() && i < d->actions.size(); ++i)
ret = d->actionRects.at(i).size();
if (!d->extension->isHidden())
ret += QSize(d->extension->sizeHint().width(), 0);
ret += QSize(2*fw + hmargin, 2*fw + vmargin);
}
int margin = 2*vmargin + 2*fw + spaceBelowMenuBar;
if (d->leftWidget) {
QSize sz = d->leftWidget->minimumSizeHint();
ret.setWidth(ret.width() + sz.width());
if (sz.height() + margin > ret.height())
ret.setHeight(sz.height() + margin);
}
if (d->rightWidget) {
QSize sz = d->rightWidget->minimumSizeHint();
ret.setWidth(ret.width() + sz.width());
if (sz.height() + margin > ret.height())
ret.setHeight(sz.height() + margin);
}
if (as_gui_menubar) {
QStyleOptionMenuItem opt;
opt.rect = rect();
opt.menuRect = rect();
opt.state = QStyle::State_None;
opt.menuItemType = QStyleOptionMenuItem::Normal;
opt.checkType = QStyleOptionMenuItem::NotCheckable;
opt.palette = palette();
return style()->sizeFromContents(QStyle::CT_MenuBar, &opt, ret, this);
}
return ret;
}
/*!
\reimp
*/
QSize QMenuBar::sizeHint() const
{
Q_D(const QMenuBar);
const bool as_gui_menubar = !isNativeMenuBar();
ensurePolished();
QSize ret(0, 0);
const_cast<QMenuBarPrivate*>(d)->updateGeometries();
const int hmargin = style()->pixelMetric(QStyle::PM_MenuBarHMargin, nullptr, this);
const int vmargin = style()->pixelMetric(QStyle::PM_MenuBarVMargin, nullptr, this);
int fw = style()->pixelMetric(QStyle::PM_MenuBarPanelWidth, nullptr, this);
int spaceBelowMenuBar = style()->styleHint(QStyle::SH_MainWindow_SpaceBelowMenuBar, nullptr, this);
if (as_gui_menubar) {
const int w = parentWidget() ? parentWidget()->width() : QGuiApplication::primaryScreen()->virtualGeometry().width();
d->calcActionRects(w - (2 * fw), 0);
for (const auto &actionRect : d->actionRects)
ret = ret.expandedTo(QSize(actionRect.x() + actionRect.width(), actionRect.y() + actionRect.height()));
//the action geometries already contain the top and left
//margins. So we only need to add those from right and bottom.
ret += QSize(fw + hmargin, fw + vmargin);
}
int margin = 2*vmargin + 2*fw + spaceBelowMenuBar;
if (d->leftWidget) {
QSize sz = d->leftWidget->sizeHint();
sz.rheight() += margin;
ret = ret.expandedTo(sz);
}
if (d->rightWidget) {
QSize sz = d->rightWidget->sizeHint();
ret.setWidth(ret.width() + sz.width());
if (sz.height() + margin > ret.height())
ret.setHeight(sz.height() + margin);
}
if (as_gui_menubar) {
QStyleOptionMenuItem opt;
opt.rect = rect();
opt.menuRect = rect();
opt.state = QStyle::State_None;
opt.menuItemType = QStyleOptionMenuItem::Normal;
opt.checkType = QStyleOptionMenuItem::NotCheckable;
opt.palette = palette();
return style()->sizeFromContents(QStyle::CT_MenuBar, &opt, ret, this);
}
return ret;
}
/*!
\reimp
*/
int QMenuBar::heightForWidth(int) const
{
Q_D(const QMenuBar);
const bool as_gui_menubar = !isNativeMenuBar();
const_cast<QMenuBarPrivate*>(d)->updateGeometries();
int height = 0;
const int vmargin = style()->pixelMetric(QStyle::PM_MenuBarVMargin, nullptr, this);
int fw = style()->pixelMetric(QStyle::PM_MenuBarPanelWidth, nullptr, this);
int spaceBelowMenuBar = style()->styleHint(QStyle::SH_MainWindow_SpaceBelowMenuBar, nullptr, this);
if (as_gui_menubar) {
for (const auto &actionRect : d->actionRects)
height = qMax(height, actionRect.height());
if (height) //there is at least one non-null item
height += spaceBelowMenuBar;
height += 2*fw;
height += 2*vmargin;
}
int margin = 2*vmargin + 2*fw + spaceBelowMenuBar;
if (d->leftWidget)
height = qMax(d->leftWidget->sizeHint().height() + margin, height);
if (d->rightWidget)
height = qMax(d->rightWidget->sizeHint().height() + margin, height);
if (as_gui_menubar) {
QStyleOptionMenuItem opt;
opt.initFrom(this);
opt.menuRect = rect();
opt.state = QStyle::State_None;
opt.menuItemType = QStyleOptionMenuItem::Normal;
opt.checkType = QStyleOptionMenuItem::NotCheckable;
return style()->sizeFromContents(QStyle::CT_MenuBar, &opt, QSize(0, height), this).height(); //not pretty..
}
return height;
}
/*!
\internal
*/
void QMenuBarPrivate::_q_internalShortcutActivated(int id)
{
Q_Q(QMenuBar);
QAction *act = actions.at(id);
if (act && act->menu()) {
if (QPlatformMenu *platformMenu = act->menu()->platformMenu()) {
platformMenu->showPopup(q->windowHandle(), actionRects.at(id), nullptr);
return;
}
}
keyboardFocusWidget = QApplication::focusWidget();
setCurrentAction(act, true, true);
if (act && !act->menu()) {
activateAction(act, QAction::Trigger);
//100 is the same as the default value in QPushButton::animateClick
autoReleaseTimer.start(100, q);
} else if (act && q->style()->styleHint(QStyle::SH_MenuBar_AltKeyNavigation, nullptr, q)) {
// When we open a menu using a shortcut, we should end up in keyboard state
setKeyboardMode(true);
}
}
void QMenuBarPrivate::_q_updateLayout()
{
Q_Q(QMenuBar);
itemsDirty = true;
if (q->isVisible()) {
updateGeometries();
q->update();
}
}
/*!
\fn void QMenuBar::setCornerWidget(QWidget *widget, Qt::Corner corner)
This sets the given \a widget to be shown directly on the left of the first
menu item, or on the right of the last menu item, depending on \a corner.
The menu bar takes ownership of \a widget, reparenting it into the menu bar.
However, if the \a corner already contains a widget, this previous widget
will no longer be managed and will still be a visible child of the menu bar.
\note Using a corner other than Qt::TopRightCorner or Qt::TopLeftCorner
will result in a warning.
*/
void QMenuBar::setCornerWidget(QWidget *w, Qt::Corner corner)
{
Q_D(QMenuBar);
switch (corner) {
case Qt::TopLeftCorner:
if (d->leftWidget)
d->leftWidget->removeEventFilter(this);
d->leftWidget = w;
break;
case Qt::TopRightCorner:
if (d->rightWidget)
d->rightWidget->removeEventFilter(this);
d->rightWidget = w;
break;
default:
qWarning("QMenuBar::setCornerWidget: Only TopLeftCorner and TopRightCorner are supported");
return;
}
if (w) {
w->setParent(this);
w->installEventFilter(this);
}
d->_q_updateLayout();
}
/*!
Returns the widget on the left of the first or on the right of the last menu
item, depending on \a corner.
\note Using a corner other than Qt::TopRightCorner or Qt::TopLeftCorner
will result in a warning.
*/
QWidget *QMenuBar::cornerWidget(Qt::Corner corner) const
{
Q_D(const QMenuBar);
QWidget *w = nullptr;
switch(corner) {
case Qt::TopLeftCorner:
w = d->leftWidget;
break;
case Qt::TopRightCorner:
w = d->rightWidget;
break;
default:
qWarning("QMenuBar::cornerWidget: Only TopLeftCorner and TopRightCorner are supported");
break;
}
return w;
}
/*!
\property QMenuBar::nativeMenuBar
\brief Whether or not a menubar will be used as a native menubar on platforms that support it
\since 4.6
This property specifies whether or not the menubar should be used as a native menubar on
platforms that support it. The currently supported platforms are \macos, and
Linux desktops which use the com.canonical.dbusmenu D-Bus interface (such as Ubuntu Unity).
If this property is \c true, the menubar is used in the native menubar and is not in the window of
its parent; if \c false the menubar remains in the window. On other platforms,
setting this attribute has no effect, and reading this attribute will always return \c false.
The default is to follow whether the Qt::AA_DontUseNativeMenuBar attribute
is set for the application. Explicitly setting this property overrides
the presence (or absence) of the attribute.
*/
void QMenuBar::setNativeMenuBar(bool nativeMenuBar)
{
Q_D(QMenuBar);
if (nativeMenuBar != bool(d->platformMenuBar)) {
if (!nativeMenuBar) {
delete d->platformMenuBar;
d->platformMenuBar = nullptr;
d->itemsDirty = true;
} else {
if (!d->platformMenuBar)
d->platformMenuBar = QGuiApplicationPrivate::platformTheme()->createPlatformMenuBar();
}
updateGeometry();
if (!nativeMenuBar && parentWidget())
setVisible(true);
}
}
bool QMenuBar::isNativeMenuBar() const
{
Q_D(const QMenuBar);
return bool(d->platformMenuBar);
}
/*!
\internal
*/
QPlatformMenuBar *QMenuBar::platformMenuBar()
{
Q_D(const QMenuBar);
return d->platformMenuBar;
}
/*!
\fn void QMenuBar::triggered(QAction *action)
This signal is emitted when an action in a menu belonging to this menubar
is triggered as a result of a mouse click; \a action is the action that
caused the signal to be emitted.
\note QMenuBar has to have ownership of the QMenu in order this signal to work.
Normally, you connect each menu action to a single slot using
QAction::triggered(), but sometimes you will want to connect
several items to a single slot (most often if the user selects
from an array). This signal is useful in such cases.
\sa hovered(), QAction::triggered()
*/
/*!
\fn void QMenuBar::hovered(QAction *action)
This signal is emitted when a menu action is highlighted; \a action
is the action that caused the event to be sent.
Often this is used to update status information.
\sa triggered(), QAction::hovered()
*/
// for private slots
QT_END_NAMESPACE
#include <moc_qmenubar.cpp>