QWizardPage

The QWizardPage class is the base class for wizard pages. More

Inheritance diagram of PySide2.QtWidgets.QWizardPage

Synopsis

Functions

Virtual functions

Signals

Detailed Description

QWizard represents a wizard. Each page is a QWizardPage . When you create your own wizards, you can use QWizardPage directly, or you can subclass it for more control.

A page has the following attributes, which are rendered by QWizard : a title , a subTitle , and a set of pixmaps . See Elements of a Wizard Page for details. Once a page is added to the wizard (using addPage() or setPage() ), wizard() returns a pointer to the associated QWizard object.

Page provides five virtual functions that can be reimplemented to provide custom behavior:

  • initializePage() is called to initialize the page’s contents when the user clicks the wizard’s Next button. If you want to derive the page’s default from what the user entered on previous pages, this is the function to reimplement.

  • cleanupPage() is called to reset the page’s contents when the user clicks the wizard’s Back button.

  • validatePage() validates the page when the user clicks Next or Finish. It is often used to show an error message if the user has entered incomplete or invalid information.

  • nextId() returns the ID of the next page. It is useful when creating non-linear wizards , which allow different traversal paths based on the information provided by the user.

  • isComplete() is called to determine whether the Next and/or Finish button should be enabled or disabled. If you reimplement isComplete() , also make sure that completeChanged() is emitted whenever the complete state changes.

Normally, the Next button and the Finish button of a wizard are mutually exclusive. If isFinalPage() returns true , Finish is available; otherwise, Next is available. By default, isFinalPage() is true only when nextId() returns -1. If you want to show Next and Final simultaneously for a page (letting the user perform an “early finish”), call setFinalPage (true) on that page. For wizards that support early finishes, you might also want to set the HaveNextButtonOnLastPage and HaveFinishButtonOnEarlyPages options on the wizard.

In many wizards, the contents of a page may affect the default values of the fields of a later page. To make it easy to communicate between pages, QWizard supports a "field" mechanism that allows you to register a field (e.g., a QLineEdit ) on a page and to access its value from any page. Fields are global to the entire wizard and make it easy for any single page to access information stored by another page, without having to put all the logic in QWizard or having the pages know explicitly about each other. Fields are registered using registerField() and can be accessed at any time using field() and setField() .

See also

QWizard Class Wizard Example License Wizard Example

class QWizardPage([parent=None])
param parent

QWidget

Constructs a wizard page with the given parent .

When the page is inserted into a wizard using addPage() or setPage() , the parent is automatically set to be the wizard.

See also

wizard()

PySide2.QtWidgets.QWizardPage.buttonText(which)
Parameters

whichWizardButton

Return type

unicode

Returns the text on button which on this page.

If a text has ben set using setButtonText() , this text is returned. Otherwise, if a text has been set using setButtonText() , this text is returned.

By default, the text on buttons depends on the wizardStyle . For example, on macOS , the Next button is called Continue.

PySide2.QtWidgets.QWizardPage.cleanupPage()

This virtual function is called by cleanupPage() when the user leaves the page by clicking Back (unless the IndependentPages option is set).

The default implementation resets the page’s fields to their original values (the values they had before initializePage() was called).

See also

cleanupPage() initializePage() IndependentPages

PySide2.QtWidgets.QWizardPage.completeChanged()
PySide2.QtWidgets.QWizardPage.field(name)
Parameters

name – unicode

Return type

object

Returns the value of the field called name .

This function can be used to access fields on any page of the wizard. It is equivalent to calling wizard() ->``name`` :meth:` <PySide2.QtWidgets.QWizard.field>` ).

Example:

def initializePage(self):
    className = field("className")
    self.headerLineEdit.setText(className.lower() + ".h")
    self.implementationLineEdit.setText(className.lower() + ".cpp")
    self.outputDirLineEdit.setText(QDir.convertSeparators(QDir.tempPath()))
PySide2.QtWidgets.QWizardPage.initializePage()

This virtual function is called by initializePage() to prepare the page just before it is shown either as a result of restart() being called, or as a result of the user clicking Next. (However, if the IndependentPages option is set, this function is only called the first time the page is shown.)

By reimplementing this function, you can ensure that the page’s fields are properly initialized based on fields from previous pages. For example:

def initializePage(self):
    className = field("className")
    self.headerLineEdit.setText(className.lower() + ".h")
    self.implementationLineEdit.setText(className.lower() + ".cpp")
    self.outputDirLineEdit.setText(QDir.convertSeparators(QDir.tempPath()))

The default implementation does nothing.

See also

initializePage() cleanupPage() IndependentPages

PySide2.QtWidgets.QWizardPage.isCommitPage()
Return type

bool

Returns true if this page is a commit page; otherwise returns false .

See also

setCommitPage()

PySide2.QtWidgets.QWizardPage.isComplete()
Return type

bool

This virtual function is called by QWizard to determine whether the Next or Finish button should be enabled or disabled.

The default implementation returns true if all mandatory fields are filled; otherwise, it returns false .

If you reimplement this function, make sure to emit completeChanged() , from the rest of your implementation, whenever the value of changes. This ensures that QWizard updates the enabled or disabled state of its buttons. An example of the reimplementation is available here.

PySide2.QtWidgets.QWizardPage.isFinalPage()
Return type

bool

This function is called by QWizard to determine whether the Finish button should be shown for this page or not.

By default, it returns true if there is no next page (i.e., nextId() returns -1); otherwise, it returns false .

By explicitly calling setFinalPage (true), you can let the user perform an “early finish”.

See also

isComplete() HaveFinishButtonOnEarlyPages

PySide2.QtWidgets.QWizardPage.nextId()
Return type

int

This virtual function is called by nextId() to find out which page to show when the user clicks the Next button.

The return value is the ID of the next page, or -1 if no page follows.

By default, this function returns the lowest ID greater than the ID of the current page, or -1 if there is no such ID.

By reimplementing this function, you can specify a dynamic page order. For example:

int IntroPage::nextId() const

{
    if (evaluateRadioButton->isChecked()) {
        return LicenseWizard::Page_Evaluate;
    } else {
        return LicenseWizard::Page_Register;
    }
}

See also

nextId()

PySide2.QtWidgets.QWizardPage.pixmap(which)
Parameters

whichWizardPixmap

Return type

QPixmap

Returns the pixmap set for role which .

Pixmaps can also be set for the entire wizard using setPixmap() , in which case they apply for all pages that don’t specify a pixmap.

See also

setPixmap() pixmap() Elements of a Wizard Page

PySide2.QtWidgets.QWizardPage.registerField(name, widget[, property=None[, changedSignal=None]])
Parameters
  • name – unicode

  • widgetQWidget

  • property – str

  • changedSignal – str

Creates a field called name associated with the given property of the given widget . From then on, that property becomes accessible using field() and setField() .

Fields are global to the entire wizard and make it easy for any single page to access information stored by another page, without having to put all the logic in QWizard or having the pages know explicitly about each other.

If name ends with an asterisk (* ), the field is a mandatory field. When a page has mandatory fields, the Next and/or Finish buttons are enabled only when all mandatory fields are filled. This requires a changedSignal to be specified, to tell QWizard to recheck the value stored by the mandatory field.

QWizard knows the most common Qt widgets. For these (or their subclasses), you don’t need to specify a property or a changedSignal . The table below lists these widgets:

Widget

Property

Change Notification Signal

QAbstractButton

bool checked

toggled()

QAbstractSlider

int value

valueChanged()

QComboBox

int currentIndex

currentIndexChanged()

QDateTimeEdit

QDateTime dateTime

dateTimeChanged()

QLineEdit

QString text

textChanged()

QListWidget

int currentRow

currentRowChanged()

QSpinBox

int value

valueChanged()

You can use setDefaultProperty() to add entries to this table or to override existing entries.

To consider a field “filled”, QWizard simply checks that their current value doesn’t equal their original value (the value they had before initializePage() was called). For QLineEdit , it also checks that hasAcceptableInput() returns true, to honor any validator or mask.

QWizard ‘s mandatory field mechanism is provided for convenience. It can be bypassed by reimplementing isComplete() .

PySide2.QtWidgets.QWizardPage.setButtonText(which, text)
Parameters
  • whichWizardButton

  • text – unicode

Sets the text on button which to be text on this page.

By default, the text on buttons depends on the wizardStyle , but may be redefined for the wizard as a whole using setButtonText() .

PySide2.QtWidgets.QWizardPage.setCommitPage(commitPage)
Parameters

commitPagebool

Sets this page to be a commit page if commitPage is true; otherwise, sets it to be a normal page.

A commit page is a page that represents an action which cannot be undone by clicking Back or Cancel.

A Commit button replaces the Next button on a commit page. Clicking this button simply calls next() just like clicking Next does.

A page entered directly from a commit page has its Back button disabled.

See also

isCommitPage()

PySide2.QtWidgets.QWizardPage.setField(name, value)
Parameters
  • name – unicode

  • value – object

Sets the value of the field called name to value .

This function can be used to set fields on any page of the wizard. It is equivalent to calling wizard() ->``name`` :meth:` <PySide2.QtWidgets.QWizard.setField>` , value ).

PySide2.QtWidgets.QWizardPage.setFinalPage(finalPage)
Parameters

finalPagebool

Explicitly sets this page to be final if finalPage is true.

After calling (true), isFinalPage() returns true and the Finish button is visible (and enabled if isComplete() returns true).

After calling (false), isFinalPage() returns true if nextId() returns -1; otherwise, it returns false .

See also

isFinalPage() isComplete() HaveFinishButtonOnEarlyPages

PySide2.QtWidgets.QWizardPage.setPixmap(which, pixmap)
Parameters
  • whichWizardPixmap

  • pixmapQPixmap

Sets the pixmap for role which to pixmap .

The pixmaps are used by QWizard when displaying a page. Which pixmaps are actually used depend on the wizard style .

Pixmaps can also be set for the entire wizard using setPixmap() , in which case they apply for all pages that don’t specify a pixmap.

See also

pixmap() setPixmap() Elements of a Wizard Page

PySide2.QtWidgets.QWizardPage.setSubTitle(subTitle)
Parameters

subTitle – unicode

See also

subTitle()

PySide2.QtWidgets.QWizardPage.setTitle(title)
Parameters

title – unicode

See also

title()

PySide2.QtWidgets.QWizardPage.subTitle()
Return type

unicode

See also

setSubTitle()

PySide2.QtWidgets.QWizardPage.title()
Return type

unicode

See also

setTitle()

PySide2.QtWidgets.QWizardPage.validatePage()
Return type

bool

This virtual function is called by validateCurrentPage() when the user clicks Next or Finish to perform some last-minute validation. If it returns true , the next page is shown (or the wizard finishes); otherwise, the current page stays up.

The default implementation returns true .

When possible, it is usually better style to disable the Next or Finish button (by specifying mandatory fields or reimplementing isComplete() ) than to reimplement .

PySide2.QtWidgets.QWizardPage.wizard()
Return type

QWizard

Returns the wizard associated with this page, or None if this page hasn’t been inserted into a QWizard yet.

See also

addPage() setPage()