Qt之菜單欄工具欄入門

菜單欄基本操作

創建菜單欄

QMenuBar *menuBar = new QMenuBar(this); //1.創建菜單欄
menuBar->setGeometry(0,0,width(),40);   //設置大小

QMenu *fileMenu = new QMenu("File",this);   //2.創建菜單
//3.創建行為(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.將行為添加到菜單
fileMenu->addAction(fileSaveAction);
fileMenu->addAction(fileImportAction);
fileMenu->addAction(fileExportAction);
fileMenu->addAction(fileCreateAction);
//5.將菜單添加到菜單欄
menuBar->addMenu(fileMenu);

 

可以通過自定義槽函數實現想要的功能

//行為連接到具體的槽函數
connect(fileCreateAction,SIGNAL(triggered()),this,SLOT(createFile()));　　//槽函數需要實現
connect(fileSaveAction,SIGNAL(triggered()),this,SLOT(saveFile()));
connect(fileImportAction,SIGNAL(triggered()),this,SLOT(importFile()));
connect(fileExportAction,SIGNAL(triggered()),this,SLOT(exportFile()));

 

為菜單再添加菜單實現多級菜單

QMenu *optionMenu = new QMenu("Option",this);   //創建菜單
QAction *optionSystemAction = new QAction("System",this);
QMenu *ComparisionMenu = new QMenu("Comparison",this);//**這里創建再一個菜單
QAction *optionFindEdgeAction = new QAction("Find edge",this);
QAction *optionSetDecimalAction = new QAction("Set decima",this);
optionMenu->addAction(optionSystemAction);
//添加二級菜單
optionMenu->addMenu(ComparisionMenu);//***
QAction *openAction = new QAction("open",this);
QAction *closeAction = new QAction("close",this);
//為二級菜單添加行為
ComparisionMenu->addAction(openAction);
ComparisionMenu->addAction(closeAction);

optionMenu->addAction(optionFindEdgeAction);
optionMenu->addAction(optionSetDecimalAction);
menuBar->addMenu(optionMenu);

 

工具欄

//新建一個工具欄
    QToolBar *toolBar = new QToolBar("toolbar",this);
    //設置大小
    toolBar->setGeometry(0,40,width(),40);

    //新建行為(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);

    //設置可選中，默認為false，triggered(bool)信號傳遞的bool永遠為false
    tAction1->setCheckable(true);
    tAction2->setCheckable(true);
    tAction3->setCheckable(true);

    //可以通過判斷是否選中設置不同的樣式
    connect(tAction1,SIGNAL(triggered(bool)),this,SLOT(changeIcon(bool)));

    //添加行為
    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"));
}