Miscellaneous Notes on QT Interface Development (1)

Three signal slot connections

   connect(button,SIGNAL(clicked(bool)),this,SLOT(openButtonClicked()));
   connect(button,&QPushButton::clicked,this, &Widget::openButtonClicked);
   connect(button,&QPushButton::clicked, this, [=]{
   });

//------------------------------------------ i.toLocalFileted special character garbled

else if("addFileUrls" == eventName){
            QStringList list = value.toString().trimmed().split("\n");
            QList<QUrl> filesList = QUrl::fromStringList(list);
            QStringList sendFilesList;
            for (auto i : filesList) {
                sendFilesList.append(i.toLocalFile());
            }
            emit sendFileIDSig(sendFilesList);
}

//qml-c++
//------------------------------------------compressInfoList.format

function startCompressing(files){
        console.log("start compressing -----------------------------------------------------", files)
        var compressInfoList = {}
        compressInfoList.compressFiles = files
            compressInfoList.format = "Original"
            compressInfoList.quality = 30
            compressInfoList.OutputPath = "Source file"
        eventManager.sendToWidget("StartCompress", compressInfoList)
    }

//--------------------------------------value.toMap()["format"]

else if(eventName == "StartCompress"){//开始压缩
            emit signalsstartCompress(value.toMap());
            qDebug()<<"value.toMap() --------format"<<value.toMap()["format"];
            qDebug()<<"value.toMap() --------format"<<value.toMap()["quality"];
            qDebug()<<"value.toMap() --------format"<<value.toMap()["compressFiles"].toStringList();
            qDebug()<<"value.toMap() --------format"<<value.toMap()["OutputPath"];

        }

//----------------------------------------------calculate md5

QString returnMD5 = "";
returnMD5 = QCryptographicHash::hash(data, QCryptographicHash::Md5).toHex();

//-----------------------------------------------get fileData

QFile loadFile(filePath);
bool isOk =loadFile.open(QFile::ReadOnly);
qDebug()<<filePath<<isOk;
if(isOk){
        QDataStream stream(&loadFile);
        stream >> data;
}

//----------------------------------filenotexist

QFileInfo projectInfo(projectPath);
if(!projectInfo.exists()){
}

//-------------------------------show window widthout taskbar
//This new window has no corresponding task in the taskbar Icon, and cannot be closed, if you need to make desktop floating toolbar, you can use QDockWidget

QWidget widget;      
widget.setWindowFlags(Qt::Tool | Qt::WindowStaysOnTopHint |Qt::X11BypassWindowManagerHint);

//Get the file path, file name and suffix in qt
https://blog.csdn.net/chan_qx/article/details/50950371

//QList to QVariant

QList<int> list1;
list1 << 11 << 22 << 33;
QVariant v = QVariant::fromValue<QList<int> >(list1);

//QVariant to QList

QList<int> list2 = v.value<QList<int> >();

setWindowFlags tool和popup

tool can float on the dialog

popup can float on the tool

But the popup will grab the focus

The exec display will definitely grab the focus

Miscellaneous Notes on QT Interface Development (1)

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