QAbstractFormBuilder Class

The QAbstractFormBuilder class provides a default implementation for classes that create user interfaces at run-time. 更多...

头文件:	#include <QAbstractFormBuilder>
qmake:	QT += designer
派生类:	QFormBuilder

所有的成员列表, 包括继承的成员

公有函数

	QAbstractFormBuilder()
virtual	~QAbstractFormBuilder()
QString	errorString() const
virtual QWidget *	load(QIODevice *device, QWidget *parent = Q_NULLPTR)
virtual void	save(QIODevice *device, QWidget *widget)
void	setWorkingDirectory(const QDir &directory)
QDir	workingDirectory() const

详细描述

The QAbstractFormBuilder class provides a default implementation for classes that create user interfaces at run-time.

QAbstractFormBuilder provides a standard interface and a default implementation for constructing forms from user interface files. It is not intended to be instantiated directly. Use the QFormBuilder class to create user interfaces from UI files at run-time. For example:


          MyForm::MyForm(QWidget *parent)
              : QWidget(parent)
          {
              QFormBuilder builder;
              QFile file(":/forms/myWidget.ui");
              file.open(QFile::ReadOnly);
              QWidget *myWidget = builder.load(&file, this);
              file.close();

              QVBoxLayout *layout = new QVBoxLayout;
              layout->addWidget(myWidget);
              setLayout(layout);
          }

To override certain aspects of the form builder's behavior, subclass QAbstractFormBuilder and reimplement the relevant virtual functions:

load() handles reading of UI format files from arbitrary QIODevices, and construction of widgets from the XML data that they contain.
save() handles saving of widget details in UI format to arbitrary QIODevices.
workingDirectory() and setWorkingDirectory() control the directory in which forms are held. The form builder looks for other resources on paths relative to this directory.

The QFormBuilder class is typically used by custom components and applications that embed Qt Designer. Standalone applications that need to dynamically generate user interfaces at run-time use the QUiLoader, found in the Qt UI Tools module.

参见 Qt UI Tools.

成员函数

QAbstractFormBuilder::QAbstractFormBuilder()

Constructs a new form builder.

`[virtual]` QAbstractFormBuilder::~QAbstractFormBuilder()

Destroys the form builder.

QString QAbstractFormBuilder::errorString() const

Returns a human-readable description of the last error occurred in load().

This function was introduced in Qt 5.0.

参见 load().

`[virtual]` QWidget *QAbstractFormBuilder::load(QIODevice **device*, QWidget **parent* = Q_NULLPTR)

Loads an XML representation of a widget from the given device, and constructs a new widget with the specified parent.

参见 save() and errorString().

`[virtual]` void QAbstractFormBuilder::save(QIODevice **device*, QWidget **widget*)

Saves an XML representation of the given widget to the specified device in the standard UI file format.

参见 load().

void QAbstractFormBuilder::setWorkingDirectory(const QDir &directory)

Sets the current working directory of the form builder to the specified directory.

参见 workingDirectory().

QDir QAbstractFormBuilder::workingDirectory() const

Returns the current working directory of the form builder.

参见 setWorkingDirectory().

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