內容

• 公共函數
• 公共槽
• 靜態公共成員
• 重實現保護函數
• 詳細描述

QErrorMessage 類

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

頭：	#include <QErrorMessage>
qmake:	QT += widgets
繼承：	QDialog

• 所有成員列錶，包括繼承成員

公共函數

	QErrorMessage (QWidget * parent = Q_NULLPTR)
	~QErrorMessage ()

• 8 公共函數繼承自 QDialog
• 214 公共函數繼承自 QWidget
• 32 公共函數繼承自 QObject
• 14 公共函數繼承自 QPaintDevice

公共槽

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

• 5 公共槽繼承自 QDialog
• 19 公共槽繼承自 QWidget
• 1 公共槽繼承自 QObject

靜態公共成員

QErrorMessage *

qtHandler ()

• 5 靜態公共成員繼承自 QWidget
• 11 靜態公共成員繼承自 QObject

重實現保護函數

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

• 6 保護函數繼承自 QDialog
• 35 保護函數繼承自 QWidget
• 9 保護函數繼承自 QObject
• 1 保護函數繼承自 QPaintDevice

額外繼承成員

• 2 特性繼承自 QDialog
• 59 特性繼承自 QWidget
• 1 特性繼承自 QObject
• 3 信號繼承自 QDialog
• 3 信號繼承自 QWidget
• 2 信號繼承自 QObject
• 6 保護函數繼承自 QDialog
• 35 保護函數繼承自 QWidget
• 9 保護函數繼承自 QObject
• 1 保護函數繼承自 QPaintDevice
• 1 保護槽繼承自 QWidget

詳細描述

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.

靜態 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 標準對話框 範例展示如何使用 QErrorMessage 及其它內置 Qt 對話框。

另請參閱 QMessageBox , QStatusBar::showMessage ()，和 標準對話框範例 .

成員函數文檔編製

QErrorMessage:: QErrorMessage ( QWidget * parent = Q_NULLPTR)

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

QErrorMessage:: ~QErrorMessage ()

銷毀錯誤消息對話框。

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

重實現自 QWidget::changeEvent ().

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

重實現自 QDialog::done ().

[static] QErrorMessage *QErrorMessage:: qtHandler ()

返迴指針指嚮 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 )

這是重載函數。

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.

該函數在 Qt 4.5 引入。

另請參閱 showMessage ().