内容

• 公共函数
• 公共槽
• 静态公共成员
• 重实现保护函数
• 详细描述

QErrorMessage 类

The QErrorMessage class provides an error message display dialog. 更多...

头：	#include <QErrorMessage>
qmake:	QT += widgets
继承：	QDialog

• 所有成员列表，包括继承成员
• 过时成员

公共函数

	QErrorMessage (QWidget * parent = nullptr)
virtual	~QErrorMessage ()

• 8 公共函数继承自 QDialog
• 214 公共函数继承自 QWidget
• 31 公共函数继承自 QObject
• 14 公共函数继承自 QPaintDevice

公共槽

void	showMessage (const QString & message )
void	showMessage (const QString & message , const QString & type )

• 5 公共槽继承自 QDialog
• 19 公共槽继承自 QWidget
• 1 公共槽继承自 QObject

静态公共成员

QErrorMessage *	qtHandler ()
const QMetaObject	staticMetaObject

• 5 静态公共成员继承自 QWidget
• 9 静态公共成员继承自 QObject

重实现保护函数

virtual void	changeEvent (QEvent * e ) override
virtual void	done (int a ) override

• 6 保护函数继承自 QDialog
• 35 保护函数继承自 QWidget
• 9 保护函数继承自 QObject
• 1 保护函数继承自 QPaintDevice

额外继承成员

• 2 特性继承自 QDialog
• 59 特性继承自 QWidget
• 1 特性继承自 QObject
• 3 信号继承自 QDialog
• 3 信号继承自 QWidget
• 2 信号继承自 QObject
• 6 保护函数继承自 QDialog
• 35 保护函数继承自 QWidget
• 9 保护函数继承自 QObject
• 1 保护函数继承自 QPaintDevice
• 1 保护槽继承自 QWidget

详细描述

The QErrorMessage class provides an error message display dialog.

An error message widget consists of a text label and a checkbox. The checkbox lets the user control whether the same error message will be displayed again in the future, typically displaying the text, "Show this message again" translated into the appropriate local language.

For production applications, the class can be used to display messages which the user only needs to see once. To use QErrorMessage like this, you create the dialog in the usual way, and show it by calling the showMessage () slot or connecting signals to it.

静态 qtHandler () function installs a message handler using qInstallMessageHandler () and creates a QErrorMessage that displays qDebug (), qWarning () 和 qFatal () messages. This is most useful in environments where no console is available to display warnings and error messages.

In both cases QErrorMessage will queue pending messages and display them in order, with each new message being shown as soon as the user has accepted the previous message. Once the user has specified that a message is not to be shown again it is automatically skipped, and the dialog will show the next appropriate message in the queue.

The 标准对话框 范例展示如何使用 QErrorMessage 及其它内置 Qt 对话框。

另请参阅 QMessageBox , QStatusBar::showMessage ()，和 标准对话框范例 .

成员函数文档编制

QErrorMessage:: QErrorMessage ( QWidget * parent = nullptr)

Constructs and installs an error handler window with the given parent .

[虚拟] QErrorMessage:: ~QErrorMessage ()

销毁错误消息对话框。

[override virtual protected] void QErrorMessage:: changeEvent ( QEvent * e )

重实现自 QWidget::changeEvent ().

[override virtual protected] void QErrorMessage:: done ( int a )

重实现自 QDialog::done ().

[static] QErrorMessage *QErrorMessage:: qtHandler ()

返回指针指向 QErrorMessage object that outputs the default Qt messages. This function creates such an object, if there isn't one already.

[slot] void QErrorMessage:: showMessage (const QString & message )

Shows the given message, message , and returns immediately. If the user has requested for the message not to be shown again, this function does nothing.

Normally, the message is displayed immediately. However, if there are pending messages, it will be queued to be displayed later.

[slot] void QErrorMessage:: showMessage (const QString & message , const QString & type )

这是重载函数。

Shows the given message, message , and returns immediately. If the user has requested for messages of type, type , not to be shown again, this function does nothing.

Normally, the message is displayed immediately. However, if there are pending messages, it will be queued to be displayed later.

该函数在 Qt 4.5 引入。

另请参阅 showMessage ().