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Reference to the file: #include
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instantiated object:
QFileDialog filedlg(nullptr,//parent window
"open image file", //title
"C:",//default directory
"ImageFile(*.jpg *.png)");//File type filtering
//show
if(filedlg.exec()==QDialog::Accepted){
}
display effect
File dialog example source code:
QFileDialog fileDlg(this,
"FileDialog",
"c://",
"All File(*.*);;"
"Video File(*.mp4 *.avi *.mkv *.flv);;"
"Doc File(*.pdf *.doc *.docx *.xls *.xlsx)");
fileDlg.setWindowTitle(QString::fromLocal8Bit("Please select a file"));
fileDlg.exec();
QStringList selectFiles = fileDlg.selectedFiles();
QMessageBox::information(this,
QString::fromLocal8Bit("Select hint"),
QString::fromLocal8Bit("File name:" + selectFiles[0].toLocal8Bit()));
QFileInfo fileinfo(selectFiles[0]);
QString strInfo = QString::fromLocal8Bit("File name: %1 Absolute file path: %2 File extension: %3 File size: %4").arg(fileinfo.fileName())
.arg(fileinfo.absolutePath())
.arg(fileinfo.suffix())
.arg(fileinfo. size());
QMessageBox::warning(this,
QString::fromLocal8Bit("File Properties"),
strInfo);
Open single file and multi-letter file example:
QString selectFileName = QFileDialog::getOpenFileName(this,
QString::fromLocal8Bit("Open a single file"),
"C://",
"All File(*.*);;"
"Video File(*.mp4 *.avi *.mkv *.flv);;"
"Doc File(*.pdf *.doc *.docx *.xls *.xlsx)");
QMessageBox::information(this,
QString::fromLocal8Bit( "filename"),
selectFileName);
QStringList selectFileNames = QFileDialog::getOpenFileNames(this,
QString::fromLocal8Bit("Open multiple files"),
"C://",
"All File(*.*);;"
"Video File(*.mp4 *.avi *.mkv *.flv);;"
"Doc File(*.pdf *.doc *.docx *.xls *.xlsx)");
for (QString v : selectFileNames ) {
QMessageBox::question(this,
QString::fromLocal8Bit( "filename"),
v);
}
Save file example:
QString saveFileName = QFileDialog::getSaveFileName(this,
QString::fromLocal8Bit("Save a single file"),
"C://",
"All File(*.*);;"
"Video File(*.mp4 *.avi *.mkv *.flv);;"
"Doc File(*.pdf *.doc *.docx *.xls *.xlsx)");
QMessageBox::information(this,
QString::fromLocal8Bit( "filename"),
saveFileName);
Custom dialog:
QFileDialog dlg(this,NULL,"C://","All File(*.*)");
//Enable multiple file selection mode
dlg.setFileMode(QFileDialog::ExistingFiles);
int r = dlg.exec();
if(QDialog::Accepted==r){
QMessageBox::information(this,"info",QString::fromLocal8Bit("Select the open button"));
// Loop through the output file names
for(QString v:dlg. selectedFiles()){
QMessageBox::information(this,"tip",v);
}
}
if(QDialog::Rejected==r){
QMessageBox::information(this,"info",QString::fromLocal8Bit("Select the cancel button"));
}
/ / Construct the save file dialog box by setting the mode
QFileDialog saveDlg(this,NULL,NULL,"Text File(*.txt)");
saveDlg.setAcceptMode(QFileDialog::AcceptSave);//Set to save mode, the default is open mode
saveDlg.setDirectory("C:");//Set the default directory
saveDlg.exec();
Font dialog:
Font dialog source code:
QFontDialog fontDlg;
fontDlg.setWindowTitle(QString::fromLocal8Bit("Please select a font"));
// specify default font settings
QFont defFont(QString::fromLocal8Bit("Microsoft Yahei"),72,QFont::Bold);
fontDlg.setCurrentFont(defFont);
if(QFileDialog::Accepted==fontDlg.exec()){
QFont fnt = fontDlg.selectedFont();
QString strFont=QString::fromLocal8Bit("family:%1 pointSize:%2 styleName:%3")
.arg(fnt.family()).arg(fnt.pointSize()).arg(fnt.styleName());
QMessageBox::information(this, NULL, strFont);
//Use the specified font through getFont
bool isOk=false;
QFont selFont = QFontDialog::getFont( &isOk,fnt,this);
if(isOk){
QString strFont=QString::fromLocal8Bit("family:%1 pointSize:%2 styleName:%3")
.arg(fnt.family()).arg(fnt.pointSize()).arg(fnt.styleName());
QMessageBox::information(this, NULL, strFont);
}
}
Color dialog:
Color dialog source code:
QColorDialog colorDlg;
//set the default color
QColor c("#ff156f");//255,21,111,255 for rgba
colorDlg.setCurrentColor(c);
QPoint p = pos();//window in screen coordinates
colorDlg.setWindowTitle(QString::fromLocal8Bit("Please select a color - [x coordinate: %1, y coordinate: %2]").arg(p.x()).arg(p.y()));
int r = colorDlg.exec();
if(QColorDialog::Accepted==r){
QColor color = colorDlg. selectedColor();
int qr = qRed(color.rgb());
int qg = qGreen(color.rgb());
int qb = qBlue(color.rgb());
QString strColor=QString::fromLocal8Bit("R:%1 , G:%2 , B:%3 , HUE:%4 , SAT:%5 , VAL:%6 , HEX:#%7%8%9")
.arg(color.red()).arg(color.green()).arg(color.blue())
.arg(color.hue()).arg(color.saturation()).arg(color.value())
.arg(qr==0?"00":QString::number(qr,16))
.arg(qg==0?"00":QString::number(qg,16))
.arg(qb==0?"00":QString::number(qb,16));
QMessageBox::information(this, NULL, strColor);
QColor newColor = QColorDialog::getColor(color,this,"color test", QColorDialog::ShowAlphaChannel);//Display alpha channel
}