QMenu的个性化定制

    经常使用菜单，菜单的定制相当重要，普通的样式设置不难，一般需求足以实现（QMenu + QAction）。如果要足够个性，则需要进行一定的定制。

    说起定制，其实也是利用Qt中现成的组件进行组装而已，使用QMenu + QWidgetAction + QAction ，再加上QSS美化就可实现个性的QMenu。

先看效果（模仿酷狗所做的一个托盘菜单）：

主要代码如下：

SystemTray::SystemTray()

: QSystemTrayIcon()

{

this->createActions();

this->createPlayAction();

this->addActions();

this->translateLanguage();

this->setContextMenu(pop_menu);

}

SystemTray::~SystemTray()

{

}

void SystemTray::translateLanguage()

{

this->setToolTip(tr("hey music"));

this->switchPlayToolTip(is_paly);

        backward_button->setToolTip(tr("backward"));

        forward_button->setToolTip(tr("forward"));

show_action->setText(tr("show"));

setting_action->setText(tr("setting"));

lock_lrc_action->setText(tr("lock lrc"));

this->showLrc(is_show);

login_action->setText(tr("login"));

logout_action->setText(tr("logout"));

}

void SystemTray::createActions()

{

this->setIcon(QIcon(":/images/music.png"));

pop_menu = new QMenu();

show_action = new QAction(pop_menu);

setting_action = new QAction(pop_menu);

lock_lrc_action = new QAction(pop_menu);

show_lrc_action = new QAction(pop_menu);

login_action = new QAction(pop_menu);

logout_action = new QAction(pop_menu);

connect(show_action, &QAction::triggered, this, &SystemTray::showWidget);

connect(show_lrc_action, &QAction::triggered, this, static_cast(&SystemTray::showLrc));

connect(login_action, &QAction::triggered, this, &SystemTray::showLoginWidget);

connect(logout_action, &QAction::triggered, this, &SystemTray::logoutWidget);

}

void SystemTray::createPlayAction()

{

play_widget = new QWidget();

play_widget_action = new QWidgetAction(pop_menu);

play_button = new QPushButton();

backward_button = new QPushButton();

forward_button = new QPushButton();

music_name_label = new QLabel();

music_name_label->setFixedWidth(MUSIC_NAME_WIDTH);

music_name_label->setAlignment(Qt::AlignCenter);

QPixmap play_pixmap(":/action/pause");

        play_button->setIcon(play_pixmap);

play_button->setIconSize(play_pixmap.size());

play_button->setObjectName("transparentButton");

QPixmap  backward_pixmap(":/action/backward");

        backward_button->setIcon(backward_pixmap);

backward_button->setIconSize(backward_pixmap.size());

backward_button->setObjectName("transparentButton");

QPixmap forward_pixmap(":/action/forward");

        forward_button->setIcon(forward_pixmap);

forward_button->setIconSize(forward_pixmap.size());

forward_button->setObjectName("transparentButton");

backward_button->setCursor(Qt::PointingHandCursor);

play_button->setCursor(Qt::PointingHandCursor);

forward_button->setCursor(Qt::PointingHandCursor);

QHBoxLayout *layout = new QHBoxLayout();

layout->addWidget(backward_button);

layout->addWidget(play_button);

layout->addWidget(forward_button);

layout->setSpacing(0);

layout->setContentsMargins(20, 0, 20, 0);

QVBoxLayout *layout2 = new QVBoxLayout();

layout2->addLayout(layout);

layout2->addWidget(music_name_label, 0, Qt::AlignCenter);

layout2->setSpacing(5);

layout2->setContentsMargins(0, 0, 0, 5);

music_name_label->setText("player");

music_name_label->setEnabled(false);

play_widget->setLayout(layout2);

play_widget_action->setDefaultWidget(play_widget);

connect(play_button, &QPushButton::clicked, this, &SystemTray::play);

connect(backward_button, &QPushButton::clicked, this, &SystemTray::skipBackward);

connect(forward_button, &QPushButton::clicked, this, &SystemTray::skipForward);

}

void SystemTray::addActions()

{

pop_menu->addAction(play_widget_action);

pop_menu->addSeparator();

pop_menu->addAction(show_action);

pop_menu->addSeparator();

pop_menu->addAction(setting_action);

pop_menu->addAction(lock_lrc_action);

pop_menu->addAction(show_lrc_action);

pop_menu->addSeparator();

pop_menu->addAction(login_action);

pop_menu->addAction(logout_action);

}