Qt_自定义菜单（转载）

转载地址：https://www.cnblogs.com/newstart/p/3365617.html
一、右键菜单

右键菜单实现：通过重写contextMenuEvent(QContextMenuEvent *event)事件，QMenu+QAction即可完美实现！

重写voidcontextMenuEvent(QContextMenuEvent*event)事件
void Form::contextMenuEvent(QContextMenuEvent *event)
{
//创建菜单、菜单项
QMenu *pop_menu = new QMenu();
QAction *add_images_action = new QAction(this);
QAction *add_folder_action = new QAction(this);
QAction *remove_selected_action = new QAction(this);
QAction *remove_all_action = new QAction(this);
add_images_action->setText(tr(“add images”));
add_folder_action->setText(tr(“add folder”));
remove_selected_action->setText(tr(“remove selected images”));
remove_all_action->setText(tr(“remove all images”));
//清除原有菜单
pop_menu->addAction(add_images_action);
pop_menu->addAction(add_folder_action);
pop_menu->addAction(remove_selected_action);
pop_menu->addAction(remove_all_action);
//菜单出现的位置为当前鼠标的位置
pop_menu->exec(QCursor::pos());
}

二、按钮菜单

使用QPushButton(QToolButton)+QMenu+QAction即可完美实现！

QMenu *remove_menu = new QMenu();
QAction *remove_selected_action = new QAction(remove_menu);
QAction *remove_all_action = new QAction(remove_menu);
remove_menu->addAction(remove_selected_action);
remove_menu->addAction(remove_all_action);
ui->pushButton->setMenu(remove_menu);
ui->pushButton->setText(tr(“remove”));
remove_selected_action->setText(tr(“remove selected watermarks”));
remove_all_action->setText(tr(“remove all watermarks”));

三、托盘菜单

托盘菜单实现：通过QSystemTrayIcon+QMenu+QAction实现；

QSystemTrayIcon *system_tray = new QSystemTrayIcon();
//放在托盘提示信息、托盘图标
system_tray ->setToolTip(QString(“我就是托盘”));
system_tray ->setIcon(QIcon(":/sx1.png"));
//TrayMenu *tray_menu = new TrayMenu();
QMenu *remove_menu = new QMenu();
QAction *remove_selected_action = new QAction(remove_menu);
QAction *remove_all_action = new QAction(remove_menu);
remove_menu->addAction(remove_selected_action);
remove_menu->addAction(remove_all_action);
remove_selected_action->setText(tr(“remove selected watermarks”));
remove_all_action->setText(tr(“remove all watermarks”));
system_tray->setContextMenu(remove_menu);

//点击托盘执行的事件
connect(system_tray , SIGNAL(activated(QSystemTrayIcon::ActivationReason)), this, SLOT(iconIsActived(QSystemTrayIcon::ActivationReason)));
connect(remove_menu, SIGNAL(showWidget()), this, SLOT(showNormal()));
//显示托盘
system_tray->show();
//托盘显示提示信息
system_tray->showMessage(QString(“托盘标题”), QString(“托盘显示内容”));

注：关闭和最小化进入到托盘代码
void Form::closeEvent(QCloseEvent *e)
{
this->hide();
e->ignore();
}
void Form::changeEvent(QEvent *e)
{
if((e->type()==QEvent::WindowStateChange)&&this->isMinimized())
{
this->hide();
e->ignore();
}
}

作者：江南烟雨居
出处：http://www.cnblogs.com/newstart//
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