Qt message box QMessageBox

information

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

This is a relatively common kind of usage, the effect is as follows:

Prototype information:

StandardButton QMessageBox::information(QWidget * parent, const QString & title, const QString & text, StandardButtons buttons = Ok, StandardButton defaultButton = NoButton) [static]

The first parameter is a pointer to the parent control
The second parameter is the title
The third parameter is the content
The fourth parameter is the window to which the number of buttons (the default is OK)
The fifth parameter specifies the use of buttons when pressed Enter. (Default NoButton, QMessageBox case automatically selects the appropriate default.)

Example 1:

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

At this time, the fourth and fifth as the default parameters, the effect of:

Example 2:

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

And the effect (the same as in FIG. 1):

Example Three:

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

Add plurality of buttons | operator is connected, the effect of:

Reference button type:

 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     };

会创建消息提示框后，我们怎么知道用户点了什么呢，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. 关键的; 批评的，爱挑剔的; 严重的; 极重要的;

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：