How to add a static method to QInputDialog to return user data?

Question

QString QInputDialog::getText ( QWidget * parent, const QString & title, const QString & label, QLineEdit::EchoMode mode = QLineEdit::Normal, const QString & text = QString(), bool * ok = 0, Qt::WindowFlags flags = 0 ) [static] 

This function is defined to call the get dialog and return the text to be inserted into the QLine editing. So I want to create a static getData method that returns a data structure (say, QPair) and works just like QInputDialog::getText() . I tried, but I could not do it. How can i do this?

Answer 1

I have done this, but I am sending messages to people who need it. Here is the acceleration of the dialog box, which is designed to resize the image. More precisely, to represent the user the current image size and provide him with an interface for resizing and getting a new size using QPair.

 class ResizeImageDialog : public QDialog { Q_OBJECT double m_ratio; QLabel *m_widthLabel; QLabel *m_hightLabel; QDoubleSpinBox *m_widthSpinBox; QDoubleSpinBox *m_hightSpinBox; QCheckBox *m_keepRatioCheckBox; QPushButton *m_okButton; QPushButton *m_cancelButton; QHBoxLayout *m_widthLayout; QHBoxLayout *m_hightLayout; QHBoxLayout *m_buttonLayout; QVBoxLayout *m_generalLayout; private slots: void widthChanged(double width); void hightChanged(double hight); public: ResizeImageDialog(QWidget * parent = 0, double imageWidth = 100.0, double imageHight = 100.0):QDialog(parent) { m_widthLabel = new QLabel("Image width"); m_hightLabel = new QLabel("Image hight"); m_widthSpinBox = new QDoubleSpinBox; m_widthSpinBox->setMaximum(1500); m_widthSpinBox->setValue(imageWidth); connect(m_widthSpinBox, SIGNAL(valueChanged(double)), this, SLOT(widthChanged(double))); m_hightSpinBox = new QDoubleSpinBox; m_hightSpinBox->setMaximum(1500); m_hightSpinBox->setValue(imageHight); connect(m_hightSpinBox, SIGNAL(valueChanged(double)), this, SLOT(hightChanged(double))); m_ratio = imageWidth/imageHight; m_keepRatioCheckBox = new QCheckBox("Keep ratio",this); m_keepRatioCheckBox->setChecked(true); m_widthLayout = new QHBoxLayout; m_widthLayout->addWidget(m_widthLabel); m_widthLayout->addWidget(m_widthSpinBox); m_hightLayout = new QHBoxLayout; m_hightLayout->addWidget(m_hightLabel); m_hightLayout->addWidget(m_hightSpinBox); m_okButton = new QPushButton("OK"); connect(m_okButton, SIGNAL(clicked()), this, SLOT(accept())); m_cancelButton = new QPushButton("Cancel"); connect(m_cancelButton, SIGNAL(clicked()), this, SLOT(reject())); m_buttonLayout = new QHBoxLayout; m_buttonLayout->addStretch(); m_buttonLayout->addWidget(m_okButton); m_buttonLayout->addWidget(m_cancelButton); m_generalLayout = new QVBoxLayout; m_generalLayout->addLayout(m_widthLayout); m_generalLayout->addLayout(m_hightLayout); m_generalLayout->addWidget(m_keepRatioCheckBox); m_generalLayout->addLayout(m_buttonLayout); setLayout(m_generalLayout); setMaximumSize(300, 300); setModal(true); //resize(670,630); setWindowTitle(tr("Resize Image")); setWindowFlags(windowFlags() & ~Qt::WindowContextHelpButtonHint); } static QPair<double, double> getNewSize(QWidget * parent = 0, double imageWidth = 100.0, double imageHight = 100.0) { ResizeImageDialog dlg(parent, imageWidth, imageHight); dlg.exec(); QPair<double, double> size; size.first = dlg.m_widthSpinBox->value(); size.second = dlg.m_hightSpinBox->value(); return size; } }; 

And now you can do this:

  QPair<double, double> size = ResizeImageDialog::getNewSize(this, newImageFormat.width(), newImageFormat.height()); 

Answer 2

I'm not sure where you are having problems, but usually you want to create a class that inherits QInputDialog . Add a static method, say getPairedText() , with the same signature as getText() , except that QPair returns. Then call getText() from your function, going through all the same parameters. When getText() returns, QPair string in QPair and return it.

If you have any specific problems with this, consult the comments below and I will try to add more details to my answer.