Qt之自定义菜单（右键菜单）

在接触Qt这段时间以来，经常遇到菜单项的问题（右键菜单、托盘菜单、按钮菜单等），QMenu用于菜单栏,上下文菜单,弹出菜单等，利用QMenu+QAction就可以达到效果！

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

对象：QTreeWidget      

void ImageTree::createActions()
{

    //创建菜单、菜单项

    pop_menu = new QMenu();

    add_images_action = new QAction(this); 

    add_folder_action = new QAction(this);

    remove_selected_action = new QAction(this);

    remove_all_action = new QAction(this);



    //连接信号与槽

    connect(add_images_action, &QAction::triggered, this, &ImageTree::selectImages);

    connect(add_folder_action, &QAction::triggered, this, &ImageTree::selectFolder);

   connect(remove_selected_action, &QAction::triggered, this, &ImageTree::removeSelectedImages);

    connect(remove_all_action, &QAction::triggered, this, &ImageTree::removeAllImages);

}



void ImageTree::contextMenuEvent(QContextMenuEvent *event)

{

    //清除原有菜单

    pop_menu->clear();

   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());

    event->accept();

}



void ImageTree::translateLanguage()

{

   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"));

}