QWizardPage 类

QWizardPage 类是用于向导页面的基类。更多...

头：	#include <QWizardPage>
qmake:	QT += widgets
Since:	Qt 4.3
继承：	QWidget

该类在 Qt 4.3 引入。

所有成员列表，包括继承成员

特性

subTitle : QString
title : QString

公共函数

	QWizardPage (QWidget * parent = nullptr)
virtual	~QWizardPage ()
QString	buttonText (QWizard::WizardButton which ) const
virtual void	cleanupPage ()
virtual void	initializePage ()
bool	isCommitPage () const
virtual bool	isComplete () const
bool	isFinalPage () const
virtual int	nextId () const
QPixmap	pixmap (QWizard::WizardPixmap which ) const
void	setButtonText (QWizard::WizardButton which , const QString & text )
void	setCommitPage (bool commitPage )
void	setFinalPage (bool finalPage )
void	setPixmap (QWizard::WizardPixmap which , const QPixmap & pixmap )
void	setSubTitle (const QString & subTitle )
void	setTitle (const QString & title )
QString	subTitle () const
QString	title () const
virtual bool	validatePage ()

信号

void	completeChanged ()

保护函数

QVariant	field (const QString & name ) const
void	registerField (const QString & name , QWidget * widget , const char * property = nullptr, const char * changedSignal = nullptr)
void	setField (const QString & name , const QVariant & value )
QWizard *	wizard () const

详细描述

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 ： title ， subTitle ，和 set of pixmaps 。见向导页面的元素 for details. Once a page is added to the wizard (using QWizard::addPage () 或 QWizard::setPage ()), wizard () returns a pointer to the associated QWizard 对象。

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 下一 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 下一 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 下一 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.

通常，下一 button and the Finish button of a wizard are mutually exclusive. If isFinalPage () 返回 true , Finish is available; otherwise, 下一 is available. By default, isFinalPage () is true only when nextId () returns -1. If you want to show 下一 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 () 和 setField ().

另请参阅 QWizard , 类向导范例，和许可向导范例 .

特性文档编制

subTitle : QString

此特性保持页面的子标题

The subtitle is shown by the QWizard , between the title and the actual page. Subtitles are optional. In ClassicStyle and ModernStyle , using subtitles is necessary to make the header appear. In MacStyle , the subtitle is shown as a text label just above the actual page.

The subtitle may be plain text or HTML, depending on the value of the QWizard::subTitleFormat 特性。

默认情况下，此特性包含空字符串。

访问函数：

QString	subTitle () const
void	setSubTitle (const QString & subTitle )

另请参阅 title , QWizard::IgnoreSubTitles ，和向导页面的元素 .

title : QString

此特性保持页面的标题

The title is shown by the QWizard , above the actual page. All pages should have a title.

The title may be plain text or HTML, depending on the value of the QWizard::titleFormat 特性。

默认情况下，此特性包含空字符串。

访问函数：

QString	title () const
void	setTitle (const QString & title )

另请参阅 subTitle and 向导页面的元素 .

成员函数文档编制

QWizardPage:: QWizardPage ( QWidget * parent = nullptr)

Constructs a wizard page with the given parent .

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

另请参阅 wizard ().

`[signal]` void QWizardPage:: completeChanged ()

This signal is emitted whenever the complete state of the page (i.e., the value of isComplete ()) changes.

If you reimplement isComplete (), make sure to emit completeChanged() whenever the value of isComplete () changes, to ensure that QWizard updates the enabled or disabled state of its buttons.

另请参阅 isComplete ().

`[虚拟]` QWizardPage:: ~QWizardPage ()

析构函数。

QString QWizardPage:: buttonText ( QWizard::WizardButton which ) const

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 QWizard::setButtonText (), this text is returned.

By default, the text on buttons depends on the QWizard::wizardStyle . For example, on macOS, the 下一 button is called Continue .

另请参阅 setButtonText (), QWizard::buttonText ()，和 QWizard::setButtonText ().

`[虚拟]` void QWizardPage:: cleanupPage ()

此虚函数被调用由 QWizard::cleanupPage () when the user leaves the page by clicking Back (unless the QWizard::IndependentPages option is set).

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

另请参阅 QWizard::cleanupPage (), initializePage ()，和 QWizard::IndependentPages .

`[protected]` QVariant QWizardPage:: field (const QString & name ) const

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 ()-> field ( name ).

范例：

void OutputFilesPage::initializePage()
{
    QString className = field("className").toString();
    headerLineEdit->setText(className.toLower() + ".h");
    implementationLineEdit->setText(className.toLower() + ".cpp");
    outputDirLineEdit->setText(QDir::toNativeSeparators(QDir::tempPath()));
}

另请参阅 QWizard::field (), setField ()，和 registerField ().

`[虚拟]` void QWizardPage:: initializePage ()

此虚函数被调用由 QWizard::initializePage () to prepare the page just before it is shown either as a result of QWizard::restart () being called, or as a result of the user clicking 下一 . (However, if the QWizard::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:

void OutputFilesPage::initializePage()
{
    QString className = field("className").toString();
    headerLineEdit->setText(className.toLower() + ".h");
    implementationLineEdit->setText(className.toLower() + ".cpp");
    outputDirLineEdit->setText(QDir::toNativeSeparators(QDir::tempPath()));
}

默认实现什么都不做。

另请参阅 QWizard::initializePage (), cleanupPage ()，和 QWizard::IndependentPages .

bool QWizardPage:: isCommitPage () const

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

另请参阅 setCommitPage ().

`[虚拟]` bool QWizardPage:: isComplete () const

此虚函数被调用由 QWizard to determine whether the 下一 or Finish button should be enabled or disabled.

默认实现返回 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 isComplete() changes. This ensures that QWizard updates the enabled or disabled state of its buttons. An example of the reimplementation is available here .

另请参阅 completeChanged () 和 isFinalPage ().

bool QWizardPage:: isFinalPage () const

此函数被调用通过 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".

另请参阅 isComplete () 和 QWizard::HaveFinishButtonOnEarlyPages .

`[虚拟]` int QWizardPage:: nextId () const

此虚函数被调用由 QWizard::nextId () to find out which page to show when the user clicks the 下一 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;
    }
}

另请参阅 QWizard::nextId ().

QPixmap QWizardPage:: pixmap ( QWizard::WizardPixmap which ) const

Returns the pixmap set for role which .

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

另请参阅 setPixmap (), QWizard::pixmap ()，和向导页面的元素 .

`[protected]` void QWizardPage:: registerField (const QString & name , QWidget * widget , const char * property = nullptr, const char * changedSignal = nullptr)

Creates a field called name 关联给定 property 为给定 widget . From then on, that property becomes accessible using field () 和 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.

若 name ends with an asterisk ( * ), the field is a mandatory field. When a page has mandatory fields, the 下一 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 或 changedSignal . The table below lists these widgets:

Widget	特性	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()

可以使用 QWizard::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 QWizardPage::isComplete ().

另请参阅 field (), setField ()，和 QWizard::setDefaultProperty ().

void QWizardPage:: setButtonText ( QWizard::WizardButton which , const QString & text )

Sets the text on button which 到 text on this page.

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

另请参阅 buttonText (), QWizard::setButtonText ()，和 QWizard::buttonText ().

void QWizardPage:: setCommitPage ( bool commitPage )

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 下一 button on a commit page. Clicking this button simply calls QWizard::next () just like clicking 下一 does.

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

另请参阅 isCommitPage ().

`[protected]` void QWizardPage:: setField (const QString & name , const QVariant & value )

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 ()-> setField( name , value ) .

另请参阅 QWizard::setField (), field ()，和 registerField ().

void QWizardPage:: setFinalPage ( bool finalPage )

Explicitly sets this page to be final if finalPage 为 true。

After calling setFinalPage(true), isFinalPage () 返回 true 和 Finish button is visible (and enabled if isComplete () 返回 true)。

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

另请参阅 isFinalPage (), isComplete ()，和 QWizard::HaveFinishButtonOnEarlyPages .

void QWizardPage:: setPixmap ( QWizard::WizardPixmap which , const QPixmap & pixmap )

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 QWizard::setPixmap (), in which case they apply for all pages that don't specify a pixmap.

另请参阅 pixmap (), QWizard::setPixmap ()，和向导页面的元素 .

`[虚拟]` bool QWizardPage:: validatePage ()

此虚函数被调用由 QWizard::validateCurrentPage () when the user clicks 下一 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.

默认实现返回 true .

When possible, it is usually better style to disable the 下一 or Finish button (by specifying mandatory fields or reimplementing isComplete ()) than to reimplement validatePage().

另请参阅 QWizard::validateCurrentPage () 和 isComplete ().

`[protected]` QWizard *QWizardPage:: wizard () const

Returns the wizard associated with this page, or nullptr if this page hasn't been inserted into a QWizard yet.

另请参阅 QWizard::addPage () 和 QWizard::setPage ().