Qt 信息提示框 QMessageBox


information

QMessageBox::information(NULL, "Title","Content",QMessageBox::Yes | QMessageBox::No, QMessageBox::Yes);

這是比較常用的一種用法,效果如下:

information原型:

StandardButton QMessageBox::information(QWidget * parent, const QString & title, const QString & text, StandardButtons buttons = Ok, StandardButton defaultButton = NoButton) [static]
  • 第一個參數是父控件指針
  • 第二個參數是標題
  • 第三個參數是內容
  • 第四個參數是窗口里面要多少個按鈕(默認為OK)
  • 第五個參數指定按下Enter時使用的按鈕。(默認為NoButton,此時QMessageBox會自動選擇合適的默認值。)

示例1:

QMessageBox::information(NULL, "Title", "Content");

此時第四第五為默認參數,效果:

示例2:

QMessageBox::information(NULL, "Title", "Content",QMessageBox::Yes|QMessageBox::No);

此時效果(與圖1相同):

示例三:

QMessageBox::information(NULL, "Title","Content",QMessageBox::Yes|QMessageBox::No| QMessageBox::Abort);

添加多個按鈕用|運算符連接,效果:

按鈕類型參考:

 1 enum StandardButton {  2         // keep this in sync with QDialogButtonBox::StandardButton
 3         NoButton           = 0x00000000,  4         Ok                 = 0x00000400,  5         Save               = 0x00000800,  6         SaveAll            = 0x00001000,  7         Open               = 0x00002000,  8         Yes                = 0x00004000,  9         YesToAll           = 0x00008000, 10         No                 = 0x00010000, 11         NoToAll            = 0x00020000, 12         Abort              = 0x00040000, 13         Retry              = 0x00080000, 14         Ignore             = 0x00100000, 15         Close              = 0x00200000, 16         Cancel             = 0x00400000, 17         Discard            = 0x00800000, 18         Help               = 0x01000000, 19         Apply              = 0x02000000, 20         Reset              = 0x04000000, 21         RestoreDefaults    = 0x08000000, 22 
23         FirstButton        = Ok,                // internal
24         LastButton         = RestoreDefaults,   // internal
25 
26         YesAll             = YesToAll,          // obsolete
27         NoAll              = NoToAll,           // obsolete
28 
29         Default            = 0x00000100,        // obsolete
30         Escape             = 0x00000200,        // obsolete
31         FlagMask           = 0x00000300,        // obsolete
32         ButtonMask         = ~FlagMask          // obsolete
33     };

會創建消息提示框后,我們怎么知道用戶點了什么呢,看如下小例子:

 1 QMessageBox:: StandardButton result= QMessageBox::information(NULL, "Title", "Content",QMessageBox::Yes|QMessageBox::No);  2 switch (result)  3 {  4 case QMessageBox::Yes:  5     qDebug()<<"Yes";  6     break;  7 case QMessageBox::No:  8     qDebug()<<"NO";  9     break; 10 default: 11     break; 12 }

 

critical

critical adj. 關鍵的; 批評的,愛挑剔的; 嚴重的; 極重要的;

QMessageBox::critical(NULL, "critical", "Content", QMessageBox::Yes | QMessageBox::No, QMessageBox::Yes);

效果:

warning

QMessageBox::warning(NULL, "warning", "Content", QMessageBox::Yes | QMessageBox::No, QMessageBox::Yes);

效果:

question

QMessageBox::question(NULL, "question", "Content", QMessageBox::Yes | QMessageBox::No, QMessageBox::Yes);

效果:

about

原型:static void about(QWidget *parent, const QString &title, const QString &text);

QMessageBox::about(NULL, "About", "by hjwblog.com");

效果:


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