Qt之菜单栏工具栏入门

时间：2023-12-24 14:57:19

菜单栏基本操作

创建菜单栏

QMenuBar *menuBar = new QMenuBar(this); //1.创建菜单栏

menuBar->setGeometry(,,width(),);   //设置大小

QMenu *fileMenu = new QMenu("File",this);   //2.创建菜单

//3.创建行为(Action)

QAction *fileCreateAction = new QAction("create",this);

QAction *fileSaveAction = new QAction("save",this);

QAction *fileImportAction = new QAction("import",this);

QAction *fileExportAction = new QAction("export",this);

//4.将行为添加到菜单

fileMenu->addAction(fileSaveAction);

fileMenu->addAction(fileImportAction);

fileMenu->addAction(fileExportAction);

fileMenu->addAction(fileCreateAction);

//5.将菜单添加到菜单栏

menuBar->addMenu(fileMenu);

可以通过自定义槽函数实现想要的功能

//行为连接到具体的槽函数

connect(fileCreateAction,SIGNAL(triggered()),this,SLOT(createFile()));　　//槽函数需要实现

connect(fileSaveAction,SIGNAL(triggered()),this,SLOT(saveFile()));

connect(fileImportAction,SIGNAL(triggered()),this,SLOT(importFile()));

connect(fileExportAction,SIGNAL(triggered()),this,SLOT(exportFile()));

为菜单再添加菜单实现多级菜单

QMenu *optionMenu = new QMenu("Option",this);   //创建菜单

QAction *optionSystemAction = new QAction("System",this);

QMenu *ComparisionMenu = new QMenu("Comparison",this);//**这里创建再一个菜单

QAction *optionFindEdgeAction = new QAction("Find edge",this);

QAction *optionSetDecimalAction = new QAction("Set decima",this);

optionMenu->addAction(optionSystemAction);

//添加二级菜单

optionMenu->addMenu(ComparisionMenu);//***

QAction *openAction = new QAction("open",this);

QAction *closeAction = new QAction("close",this);

//为二级菜单添加行为

ComparisionMenu->addAction(openAction);

ComparisionMenu->addAction(closeAction);

optionMenu->addAction(optionFindEdgeAction);

optionMenu->addAction(optionSetDecimalAction);

menuBar->addMenu(optionMenu);

工具栏

//新建一个工具栏

    QToolBar *toolBar = new QToolBar("toolbar",this);

    //设置大小

    toolBar->setGeometry(,,width(),);

    //新建行为(Action)

    tAction1 = new QAction(QIcon(":/icon/icon/Vegetables-_11.png"),"Vegetables",this);

    tAction2 = new QAction(QIcon(":/icon/icon/Vegetables-_12.png"),"Vegetables",this);

    tAction3 = new QAction(QIcon(":/icon/icon/Vegetables-_13.png"),"Vegetables",this);

    //设置可选中，默认为false，triggered(bool)信号传递的bool永远为false

    tAction1->setCheckable(true);

    tAction2->setCheckable(true);

    tAction3->setCheckable(true);

    //可以通过判断是否选中设置不同的样式

    connect(tAction1,SIGNAL(triggered(bool)),this,SLOT(changeIcon(bool)));

    //添加行为

    toolBar->addAction(tAction1);

    toolBar->addAction(tAction2);

    toolBar->addAction(tAction3);
void MainWindow::changeIcon(bool boolValue)

{

    if(boolValue)

        tAction1->setIcon(QIcon(":/icon/icon/Vegetables-_1.png"));

    else

        tAction1->setIcon(QIcon(":/icon/icon/Vegetables-_11.png"));

}

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