Qt工具栏和菜单栏

Question

为什么不这样做？它应该像这样工作：当点击“文件”时，工具栏（不是菜单栏）显示在菜单栏下方，其上有不同的按钮，可以在“文件”菜单中找到，当点击“编辑”时隐藏“文件”工具栏，并显示“编辑”工具栏。

menubar = new MyMenuBar(this);//this is a menubar with "file" and "edit"
menubar->setGeometry(0,0,1100,30);

ftoolbar = new MyFileToolBar(this); // this is a toolbar with buttons that would be
// found in a "file" menu
ftoolbar->setGeometry(0,30,1100,40);
ftoolbar->hide();

etoolbar = new MyEditToolBar(this); // this is a toolbar with buttons that would be
//found in an "edit" menu
etoolbar->setGeometry(0,30,1100,40);
etoolbar->hide();

//here down does not work
connect(menubar->File, SIGNAL(aboutToShow()), ftoolbar, SLOT(show()));
connect(menubar->File, SIGNAL(aboutToHide()), ftoolbar, SLOT(hide()));


connect(menubar->Edit, SIGNAL(aboutToShow()), etoolbar, SLOT(show()));
connect(menubar->Edit, SIGNAL(aboutToHide()), etoolbar, SLOT(hide()));

文件  修改

Answer 1

我对triggered(QAction*)的含义做了一个错误的假设。

我替换了

connect(menubar->File, SIGNAL(triggered(QAction*)), ftoolbar, SLOT(show()));
connect(menubar->File, SIGNAL(triggered(QAction*)), ftoolbar, SLOT(hide()));


connect(menubar->Edit, SIGNAL(triggered(QAction*)), etoolbar, SLOT(show()));
connect(menubar->Edit, SIGNAL(triggered(QAction*)), etoolbar, SLOT(hide()));

与

connect(menubar->File, SIGNAL(aboutToShow()), ftoolbar, SLOT(show()));
connect(menubar->File, SIGNAL(aboutToHide()), ftoolbar, SLOT(hide()));


connect(menubar->Edit, SIGNAL(aboutToShow()), etoolbar, SLOT(show()));
connect(menubar->Edit, SIGNAL(aboutToHide()), etoolbar, SLOT(hide()));