QApplication 过时成员

以下成员源于类 QApplication 已过时。 提供它们是为使旧源代码能继续工作。强烈建议不要在新代码中使用它们。

公共类型

(obsolete) enum

ColorSpec { NormalColor, CustomColor, ManyColor }

特性

• (obsolete) globalStrut : QSize

静态公共成员

(obsolete) int	colorSpec ()
(obsolete) QDesktopWidget *	desktop ()
(obsolete) QSize	globalStrut ()
(obsolete) bool	keypadNavigationEnabled ()
(obsolete) void	setColorSpec (int spec )
(obsolete) void	setGlobalStrut ( const QSize & )
(obsolete) void	setKeypadNavigationEnabled (bool enable )

成员类型文档编制

enum QApplication:: ColorSpec

This enum is obsolete. It is provided to keep old source code working. We strongly advise against using it in new code.

常量	值	描述
QApplication::NormalColor	0	the default color allocation policy
QApplication::CustomColor	1	the same as NormalColor for X11; allocates colors to a palette on demand under Windows
QApplication::ManyColor	2	the right choice for applications that use thousands of colors

见 setColorSpec () for full details.

特性文档编制

globalStrut : QSize

This property is obsolete. It is provided to keep old source code working. We strongly advise against using it in new code.

此特性保持用户可以与之交互的任何 GUI 元素应有的最小大小

例如，不应将按钮大小重置成小于全局结构大小。应考虑结构大小，当重实现可以用于触摸屏 (或类似 I/O 设备) 的 GUI 控件时。

范例：

QSize MyWidget::sizeHint() const
{
    return QSize(80, 25);
}
					

默认情况下，此特性包含 QSize 对象具有 0 宽度和高度。

访问函数：

QSize	globalStrut ()
void	setGlobalStrut ( const QSize & )

成员函数文档编制

[static] int QApplication:: colorSpec ()

此函数已过时。提供它是为使旧源代码能继续工作。强烈建议不要在新代码中使用它。

Returns the color specification.

另请参阅 QApplication::setColorSpec ().

[static] QDesktopWidget *QApplication:: desktop ()

此函数已过时。提供它是为使旧源代码能继续工作。强烈建议不要在新代码中使用它。

返回桌面 Widget (也称根窗口)。

桌面可能由多个屏幕组成，因此它将是不正确的，例如：试图 center some widget in the desktop's geometry. QDesktopWidget has various functions for obtaining useful geometries upon the desktop, such as QDesktopWidget::screenGeometry () 和 QDesktopWidget::availableGeometry ().

[static] bool QApplication:: keypadNavigationEnabled ()

此函数已过时。提供它是为使旧源代码能继续工作。强烈建议不要在新代码中使用它。

返回 true if Qt is set to use keypad navigation; otherwise returns false. The default value is false.

This feature is available in Qt for Embedded Linux, and Windows CE only.

注意： On Windows CE this feature is disabled by default for touch device mkspecs. To enable keypad navigation, build Qt with QT_KEYPAD_NAVIGATION defined.

另请参阅 setKeypadNavigationEnabled () 和 navigationMode ().

[static] void QApplication:: setColorSpec ( int spec )

此函数已过时。提供它是为使旧源代码能继续工作。强烈建议不要在新代码中使用它。

Sets the color specification for the application to spec .

This call has no effect.

The color specification controls how the application allocates colors when run on a display with a limited amount of colors, e.g. 8 bit / 256 color displays.

The color specification must be set before you create the QApplication 对象。

The options are:

• QApplication::NormalColor . This is the default color allocation strategy. Use this option if your application uses buttons, menus, texts and pixmaps with few colors. With this option, the application uses system global colors. This works fine for most applications under X11, but on the Windows platform, it may cause dithering of non-standard colors.
• QApplication::CustomColor . Use this option if your application needs a small number of custom colors. On X11, this option is the same as NormalColor . On Windows, Qt creates a Windows palette, and allocates colors to it on demand.
• QApplication::ManyColor . Use this option if your application is very color hungry, e.g., it requires thousands of colors.
  Under X11 the effect is:
  • For 256-color displays which have at best a 256 color true color visual, the default visual is used, and colors are allocated from a color cube. The color cube is the 6x6x6 (216 color) "Web palette" (the red, green, and blue components always have one of the following values: 0x00, 0x33, 0x66, 0x99, 0xCC, or 0xFF), but the number of colors can be changed by the -ncols option. The user can force the application to use the true color visual with the -visual 选项。
  • For 256-color displays which have a true color visual with more than 256 colors, use that visual. Silicon Graphics X servers this feature, for example. They provide an 8 bit visual by default but can deliver true color when asked.

  On Windows, Qt creates a Windows palette, and fills it with a color cube.

Be aware that the CustomColor and ManyColor choices may lead to colormap flashing: The foreground application gets (most) of the available colors, while the background windows will look less attractive.

范例：

int main(int argc, char *argv[])
{
    QApplication::setColorSpec(QApplication::ManyColor);
    QApplication app(argc, argv);
    ...
    return app.exec();
}
					

另请参阅 colorSpec ().

[static] void QApplication:: setKeypadNavigationEnabled ( bool enable )

此函数已过时。提供它是为使旧源代码能继续工作。强烈建议不要在新代码中使用它。

Sets whether Qt should use focus navigation suitable for use with a minimal keypad.

This feature is available in Qt for Embedded Linux, and Windows CE only.

注意： On Windows CE this feature is disabled by default for touch device mkspecs. To enable keypad navigation, build Qt with QT_KEYPAD_NAVIGATION defined.

另请参阅 keypadNavigationEnabled () 和 setNavigationMode ().