介绍 QWizardPage 类是向导页面的基类。 QWizard 表示一个向导。每个页面都是一个 QWizardPage 。当创建自己的向导时，可以直接使用 QWizardPage ，也可以子类化它以获得更多控制。 页面具有以
介绍
QWizardPage类是向导页面的基类。QWizard表示一个向导。每个页面都是一个QWizardPage。当创建自己的向导时，可以直接使用QWizardPage，也可以子类化它以获得更多控制。
页面具有以下属性，由QWizard呈现：a title，a subTitle和a set of pixmaps。有关详细信息，请参见向导页面元素。一旦将页面添加到向导中（使用QWizard :: addPage（）或QWizard :: setPage（）），wizard（）将返回指向相关的QWizard对象的指针。
页面提供了五个虚函数，可以重新实现以提供自定义行为：
-
initializePage（）在用户单击向导的“下一步”按钮时调用以初始化页面的内容。如果您想从先前页面输入的内容中派生页面的默认值，则应该重新实现此函数。 -
cleanupPage（）在用户单击向导的“返回”按钮时调用以重置页面的内容。 -
validatePage（）在用户单击Next或Finish时验证页面。如果用户输入了不完整或无效的信息，通常会使用此函数显示错误消息。 -
nextId（）返回下一页的ID。它在创建非线性向导时很有用，这些向导允许基于用户提供的信息进行不同的遍历路径。 -
isComplete（）用于确定是否应启用或禁用“下一步”和/或“完成”按钮。如果重新实现isComplete（），还必须确保每当完成状态更改时发出completeChanged（）。
通常，向导的“下一步”按钮和“完成”按钮是互斥的。如果isFinalPage（）返回true，则可用Finish；否则，可用下一步。默认情况下，isFinalPage（）仅在nextId（）返回-1时为true。如果要在页面上同时显示“下一步”和“完成”（允许用户执行“早期完成”），请在该页面上调用setFinalPage（true）。对于支持早期完成的向导，您可能还想在向导上设置HaveNextButtonOnLastPage和HaveFinishButtonOnEarlyPages选项。
在许多向导中，页面的内容可能会影响后续页面的字段的默认值。为了方便页面之间的通信，QWizard支持“字段”机制，允许您在页面上注册字段（例如QLineEdit）并从任何页面访问其值。字段对整个向导程序是全局的，并使任何单个页面都可以访问存储在另一个页面中的信息，而无需将所有逻辑放入QWizard或页面明确知道彼此。使用registerField（）注册字段，可以使用field（）和setField（）随时访问它们。
常用方法
-
virtual void initializePage(int id)这个虚函数由QWizard::initializePage()调用，以便在页面显示之前对其进行准备，或者由于QWizard::restart()被调用，或者由于用户单击Next而显示页面。(但是，如果设置了QWizard::IndependentPages选项，则仅在第一次显示页面时调用此函数。)
通过重新实现这个函数，您可以确保页面的字段是基于先前页面中的字段正确初始化的。例如:
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。
2. void setButtonText(QWizard::WizardButton which, const QString &text) 将按钮上的文本设置为本页上的文本。
默认情况下，按钮上的文本依赖于QWizard::wizardStyle，但可以使用QWizard::setButtonText()为整个向导重新定义。
setButtonText(QWizard::NextButton, "hei");
3. void setCommitPage(bool commitPage) 如果commitPage为true，则将该页设置为提交页;否则，将其设置为普通页面。
提交页是表示不能通过单击“返回”或“取消”来撤消的操作的页面。
提交按钮取代提交页面上的Next按钮。单击此按钮只调用QWizard::next()，就像单击next一样。
直接从提交页面进入的页面会禁用后退按钮。
setCommitPage(true);
-
void setFinalPage(bool finalPage)如果finalPage为true，则显式地将此页面设置为final。
调用setFinalPage(true)后，isFinalPage()返回true, Finish按钮可见(如果isComplete()返回true则启用)。
调用setFinalPage(false)后，如果nextId()返回-1,isFinalPage()返回true;否则，返回false。
示例
.h
#ifndef CLASSWIZARD_H
#define CLASSWIZARD_H
#include <QWizard>
QT_BEGIN_NAMESPACE
class QCheckBox;
class QGroupBox;
class QLabel;
class QLineEdit;
class QRadioButton;
QT_END_NAMESPACE
class ClassWizard : public QWizard
{
Q_OBJECT
public:
ClassWizard(QWidget *parent = 0);
void accept() override;
};
class IntroPage : public QWizardPage
{
Q_OBJECT
public:
IntroPage(QWidget *parent = 0);
private:
QLabel *label;
};
class ClassInfoPage : public QWizardPage
{
Q_OBJECT
public:
ClassInfoPage(QWidget *parent = 0);
private:
QLabel *classNameLabel;
QLabel *baseClassLabel;
QLineEdit *classNameLineEdit;
QLineEdit *baseClassLineEdit;
QCheckBox *qobjectMacroCheckBox;
QGroupBox *groupBox;
QRadioButton *qobjectCtorRadioButton;
QRadioButton *qwidgetCtorRadioButton;
QRadioButton *defaultCtorRadioButton;
QCheckBox *copyCtorCheckBox;
};
class CodeStylePage : public QWizardPage
{
Q_OBJECT
public:
CodeStylePage(QWidget *parent = 0);
protected:
void initializePage() override;
private:
QCheckBox *commentCheckBox;
QCheckBox *protectCheckBox;
QCheckBox *includeBaseCheckBox;
QLabel *macroNameLabel;
QLabel *baseIncludeLabel;
QLineEdit *macroNameLineEdit;
QLineEdit *baseIncludeLineEdit;
};
class OutputFilesPage : public QWizardPage
{
Q_OBJECT
public:
OutputFilesPage(QWidget *parent = 0);
protected:
void initializePage() override;
private:
QLabel *outputDirLabel;
QLabel *headerLabel;
QLabel *implementationLabel;
QLineEdit *outputDirLineEdit;
QLineEdit *headerLineEdit;
QLineEdit *implementationLineEdit;
};
class ConclusionPage : public QWizardPage
{
Q_OBJECT
public:
ConclusionPage(QWidget *parent = 0);
protected:
void initializePage() override;
private:
QLabel *label;
};
#endif.cpp
#include <QtWidgets>
#include "classwizard.h"
ClassWizard::ClassWizard(QWidget *parent)
: QWizard(parent)
{
addPage(new IntroPage);
addPage(new ClassInfoPage);
addPage(new CodeStylePage);
addPage(new OutputFilesPage);
addPage(new ConclusionPage);
setPixmap(QWizard::BannerPixmap, QPixmap(":/images/banner.png"));
setPixmap(QWizard::BackgroundPixmap, QPixmap(":/images/background.png"));
setWindowTitle(tr("Class Wizard"));
}
void ClassWizard::accept()
{
QByteArray className = field("className").toByteArray();
QByteArray baseClass = field("baseClass").toByteArray();
QByteArray macroName = field("macroName").toByteArray();
QByteArray baseInclude = field("baseInclude").toByteArray();
QString outputDir = field("outputDir").toString();
QString header = field("header").toString();
QString implementation = field("implementation").toString();
QByteArray block;
if (field("comment").toBool()) {
block += "/*\n";
block += " " + header.toLatin1() + '\n';
block += "*/\n";
block += '\n';
}
if (field("protect").toBool()) {
block += "#ifndef " + macroName + '\n';
block += "#define " + macroName + '\n';
block += '\n';
}
if (field("includeBase").toBool()) {
block += "#include " + baseInclude + '\n';
block += '\n';
}
block += "class " + className;
if (!baseClass.isEmpty())
block += " : public " + baseClass;
block += '\n';
block += "{\n";
/* qmake ignore Q_OBJECT */
if (field("qobjectMacro").toBool()) {
block += " Q_OBJECT\n";
block += '\n';
}
block += "public:\n";
if (field("qobjectCtor").toBool()) {
block += " " + className + "(QObject *parent = 0);\n";
} else if (field("qwidgetCtor").toBool()) {
block += " " + className + "(QWidget *parent = 0);\n";
} else if (field("defaultCtor").toBool()) {
block += " " + className + "();\n";
if (field("copyCtor").toBool()) {
block += " " + className + "(const " + className + " &other);\n";
block += '\n';
block += " " + className + " &operator=" + "(const " + className
+ " &other);\n";
}
}
block += "};\n";
if (field("protect").toBool()) {
block += '\n';
block += "#endif\n";
}
QFile headerFile(outputDir + '/' + header);
if (!headerFile.open(QFile::WriteOnly | QFile::Text)) {
QMessageBox::warning(0, QObject::tr("Simple Wizard"),
QObject::tr("Cannot write file %1:\n%2")
.arg(headerFile.fileName())
.arg(headerFile.errorString()));
return;
}
headerFile.write(block);
block.clear();
if (field("comment").toBool()) {
block += "/*\n";
block += " " + implementation.toLatin1() + '\n';
block += "*/\n";
block += '\n';
}
block += "#include \"" + header.toLatin1() + "\"\n";
block += '\n';
if (field("qobjectCtor").toBool()) {
block += className + "::" + className + "(QObject *parent)\n";
block += " : " + baseClass + "(parent)\n";
block += "{\n";
block += "}\n";
} else if (field("qwidgetCtor").toBool()) {
block += className + "::" + className + "(QWidget *parent)\n";
block += " : " + baseClass + "(parent)\n";
block += "{\n";
block += "}\n";
} else if (field("defaultCtor").toBool()) {
block += className + "::" + className + "()\n";
block += "{\n";
block += " // missing code\n";
block += "}\n";
if (field("copyCtor").toBool()) {
block += "\n";
block += className + "::" + className + "(const " + className
+ " &other)\n";
block += "{\n";
block += " *this = other;\n";
block += "}\n";
block += '\n';
block += className + " &" + className + "::operator=(const "
+ className + " &other)\n";
block += "{\n";
if (!baseClass.isEmpty())
block += " " + baseClass + "::operator=(other);\n";
block += " // missing code\n";
block += " return *this;\n";
block += "}\n";
}
}
QFile implementationFile(outputDir + '/' + implementation);
if (!implementationFile.open(QFile::WriteOnly | QFile::Text)) {
QMessageBox::warning(0, QObject::tr("Simple Wizard"),
QObject::tr("Cannot write file %1:\n%2")
.arg(implementationFile.fileName())
.arg(implementationFile.errorString()));
return;
}
implementationFile.write(block);
QDialog::accept();
}
IntroPage::IntroPage(QWidget *parent)
: QWizardPage(parent)
{
setTitle(tr("Introduction"));
setPixmap(QWizard::WatermarkPixmap, QPixmap(":/images/watermark1.png"));
label = new QLabel(tr("This wizard will generate a skeleton C++ class "
"definition, including a few functions. You simply "
"need to specify the class name and set a few "
"options to produce a header file and an "
"implementation file for your new C++ class."));
label->setWordWrap(true);
QVBoxLayout *layout = new QVBoxLayout;
layout->addWidget(label);
setLayout(layout);
}
ClassInfoPage::ClassInfoPage(QWidget *parent)
: QWizardPage(parent)
{
setTitle(tr("Class Information"));
setSubTitle(tr("Specify basic information about the class for which you "
"want to generate skeleton source code files."));
setPixmap(QWizard::LogoPixmap, QPixmap(":/images/logo1.png"));
classNameLabel = new QLabel(tr("&Class name:"));
classNameLineEdit = new QLineEdit;
classNameLabel->setBuddy(classNameLineEdit);
baseClassLabel = new QLabel(tr("B&ase class:"));
baseClassLineEdit = new QLineEdit;
baseClassLabel->setBuddy(baseClassLineEdit);
qobjectMacroCheckBox = new QCheckBox(tr("Generate Q_OBJECT ¯o"));
groupBox = new QGroupBox(tr("C&onstructor"));
qobjectCtorRadioButton = new QRadioButton(tr("&QObject-style constructor"));
qwidgetCtorRadioButton = new QRadioButton(tr("Q&Widget-style constructor"));
defaultCtorRadioButton = new QRadioButton(tr("&Default constructor"));
copyCtorCheckBox = new QCheckBox(tr("&Generate copy constructor and "
"operator="));
defaultCtorRadioButton->setChecked(true);
connect(defaultCtorRadioButton, &QAbstractButton::toggled,
copyCtorCheckBox, &QWidget::setEnabled);
registerField("className*", classNameLineEdit);
registerField("baseClass", baseClassLineEdit);
registerField("qobjectMacro", qobjectMacroCheckBox);
registerField("qobjectCtor", qobjectCtorRadioButton);
registerField("qwidgetCtor", qwidgetCtorRadioButton);
registerField("defaultCtor", defaultCtorRadioButton);
registerField("copyCtor", copyCtorCheckBox);
QVBoxLayout *groupBoxLayout = new QVBoxLayout;
groupBoxLayout->addWidget(qobjectCtorRadioButton);
groupBoxLayout->addWidget(qwidgetCtorRadioButton);
groupBoxLayout->addWidget(defaultCtorRadioButton);
groupBoxLayout->addWidget(copyCtorCheckBox);
groupBox->setLayout(groupBoxLayout);
QGridLayout *layout = new QGridLayout;
layout->addWidget(classNameLabel, 0, 0);
layout->addWidget(classNameLineEdit, 0, 1);
layout->addWidget(baseClassLabel, 1, 0);
layout->addWidget(baseClassLineEdit, 1, 1);
layout->addWidget(qobjectMacroCheckBox, 2, 0, 1, 2);
layout->addWidget(groupBox, 3, 0, 1, 2);
setLayout(layout);
}
CodeStylePage::CodeStylePage(QWidget *parent)
: QWizardPage(parent)
{
setTitle(tr("Code Style Options"));
setSubTitle(tr("Choose the formatting of the generated code."));
setPixmap(QWizard::LogoPixmap, QPixmap(":/images/logo2.png"));
commentCheckBox = new QCheckBox(tr("&Start generated files with a "
"comment"));
commentCheckBox->setChecked(true);
protectCheckBox = new QCheckBox(tr("&Protect header file against multiple "
"inclusions"));
protectCheckBox->setChecked(true);
macroNameLabel = new QLabel(tr("&Macro name:"));
macroNameLineEdit = new QLineEdit;
macroNameLabel->setBuddy(macroNameLineEdit);
includeBaseCheckBox = new QCheckBox(tr("&Include base class definition"));
baseIncludeLabel = new QLabel(tr("Base class include:"));
baseIncludeLineEdit = new QLineEdit;
baseIncludeLabel->setBuddy(baseIncludeLineEdit);
connect(protectCheckBox, &QAbstractButton::toggled,
macroNameLabel, &QWidget::setEnabled);
connect(protectCheckBox, &QAbstractButton::toggled,
macroNameLineEdit, &QWidget::setEnabled);
connect(includeBaseCheckBox, &QAbstractButton::toggled,
baseIncludeLabel, &QWidget::setEnabled);
connect(includeBaseCheckBox, &QAbstractButton::toggled,
baseIncludeLineEdit, &QWidget::setEnabled);
registerField("comment", commentCheckBox);
registerField("protect", protectCheckBox);
registerField("macroName", macroNameLineEdit);
registerField("includeBase", includeBaseCheckBox);
registerField("baseInclude", baseIncludeLineEdit);
QGridLayout *layout = new QGridLayout;
layout->setColumnMinimumWidth(0, 20);
layout->addWidget(commentCheckBox, 0, 0, 1, 3);
layout->addWidget(protectCheckBox, 1, 0, 1, 3);
layout->addWidget(macroNameLabel, 2, 1);
layout->addWidget(macroNameLineEdit, 2, 2);
layout->addWidget(includeBaseCheckBox, 3, 0, 1, 3);
layout->addWidget(baseIncludeLabel, 4, 1);
layout->addWidget(baseIncludeLineEdit, 4, 2);
setLayout(layout);
}
void CodeStylePage::initializePage()
{
QString className = field("className").toString();
macroNameLineEdit->setText(className.toUpper() + "_H");
QString baseClass = field("baseClass").toString();
includeBaseCheckBox->setChecked(!baseClass.isEmpty());
includeBaseCheckBox->setEnabled(!baseClass.isEmpty());
baseIncludeLabel->setEnabled(!baseClass.isEmpty());
baseIncludeLineEdit->setEnabled(!baseClass.isEmpty());
QRegularExpression rx("Q[A-Z].*");
if (baseClass.isEmpty()) {
baseIncludeLineEdit->clear();
} else if (rx.match(baseClass).hasMatch()) {
baseIncludeLineEdit->setText('<' + baseClass + '>');
} else {
baseIncludeLineEdit->setText('"' + baseClass.toLower() + ".h\"");
}
}
OutputFilesPage::OutputFilesPage(QWidget *parent)
: QWizardPage(parent)
{
setTitle(tr("Output Files"));
setSubTitle(tr("Specify where you want the wizard to put the generated "
"skeleton code."));
setPixmap(QWizard::LogoPixmap, QPixmap(":/images/logo3.png"));
outputDirLabel = new QLabel(tr("&Output directory:"));
outputDirLineEdit = new QLineEdit;
outputDirLabel->setBuddy(outputDirLineEdit);
headerLabel = new QLabel(tr("&Header file name:"));
headerLineEdit = new QLineEdit;
headerLabel->setBuddy(headerLineEdit);
implementationLabel = new QLabel(tr("&Implementation file name:"));
implementationLineEdit = new QLineEdit;
implementationLabel->setBuddy(implementationLineEdit);
registerField("outputDir*", outputDirLineEdit);
registerField("header*", headerLineEdit);
registerField("implementation*", implementationLineEdit);
QGridLayout *layout = new QGridLayout;
layout->addWidget(outputDirLabel, 0, 0);
layout->addWidget(outputDirLineEdit, 0, 1);
layout->addWidget(headerLabel, 1, 0);
layout->addWidget(headerLineEdit, 1, 1);
layout->addWidget(implementationLabel, 2, 0);
layout->addWidget(implementationLineEdit, 2, 1);
setLayout(layout);
}
void OutputFilesPage::initializePage()
{
QString className = field("className").toString();
headerLineEdit->setText(className.toLower() + ".h");
implementationLineEdit->setText(className.toLower() + ".cpp");
outputDirLineEdit->setText(QDir::toNativeSeparators(QDir::tempPath()));
}
ConclusionPage::ConclusionPage(QWidget *parent)
: QWizardPage(parent)
{
setTitle(tr("Conclusion"));
setPixmap(QWizard::WatermarkPixmap, QPixmap(":/images/watermark2.png"));
label = new QLabel;
label->setWordWrap(true);
QVBoxLayout *layout = new QVBoxLayout;
layout->addWidget(label);
setLayout(layout);
}
void ConclusionPage::initializePage()
{
QString finishText = wizard()->buttonText(QWizard::FinishButton);
finishText.remove('&');
label->setText(tr("Click %1 to generate the class skeleton.").main
#include <QApplication>
#include <QTranslator>
#include <QLocale>
#include <QLibraryInfo>
#include "classwizard.h"
int main(int argc, char *argv[])
{
Q_INIT_RESOURCE(classwizard);
QApplication app(argc, argv);
#ifndef QT_NO_TRANSLATION
QString translatorFileName = QLatin1String("qt_");
translatorFileName += QLocale::system().name();
QTranslator *translator = new QTranslator(&app);
if (translator->load(translatorFileName, QLibraryInfo::location(QLibraryInfo::TranslationsPath)))
app.installTranslator(translator);
#endif
ClassWizard wizard;
wizard.show();
return app.exec();
}