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

QErrorMessage 类提供错误消息显示对话框。 更多...

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

• 所有成员列表，包括继承成员

公共函数

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

公共槽

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

静态公共成员

QErrorMessage *

qtHandler ()

重实现保护函数

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

详细描述

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.

标准对话框 example shows how to use QErrorMessage as well as other built-in Qt dialogs.

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 .

[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 ().

[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.

[virtual] QErrorMessage:: ~QErrorMessage ()

销毁错误消息对话框。

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

重实现： QWidget::changeEvent (QEvent *event).

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

重实现： QDialog::done (int r).

[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.