# QElapsedTimer Class Reference
## [[QtCore](index.htm) module]
该QElapsedTimer类提供了一种快速的方法来计算经过的时间。[More...](#details)
### Types
* `enum ClockType { SystemTime, MonotonicClock, TickCounter, MachAbsoluteTime, PerformanceCounter }`
### Methods
* `__init__ (self)`
* `__init__ (self, QElapsedTimer)`
* `int elapsed (self)`
* `bool hasExpired (self, int timeout)`
* `invalidate (self)`
* `bool isValid (self)`
* `int msecsSinceReference (self)`
* `int msecsTo (self, QElapsedTimer other)`
* `int nsecsElapsed (self)`
* `int restart (self)`
* `int secsTo (self, QElapsedTimer other)`
* `start (self)`
### Static Methods
* `ClockType clockType ()`
* `bool isMonotonic ()`
### Special Methods
* `bool __eq__ (self, QElapsedTimer other)`
* `bool __ge__ (self, QElapsedTimer v2)`
* `bool __lt__ (self, QElapsedTimer v2)`
* `bool __ne__ (self, QElapsedTimer other)`
* * *
## Detailed Description
该QElapsedTimer类提供了一种快速的方法来计算经过的时间。
该QElapsedTimer类通常用于快速计算多少时间两个事件之间经过。它的API是类似的[QTime](qtime.html),使被使用,可以很容易的移植到新类的代码。
然而,不像[QTime](qtime.html), QElapsedTimer尝试尽可能使用单调的时钟。这意味着它不可能QElapsedTimer对象转换为人类可读的时间。
典型用例的类是确定多少时间是如何度过在一个缓慢的操作。这种情况下最简单的例子是用于调试目的,如下面的例子:
```
QElapsedTimer timer;
timer.start();
slowOperation1();
qDebug() << "The slow operation took" << timer.elapsed() << "milliseconds";
```
在这个例子中,定时器是由一个呼叫开始[start](qelapsedtimer.html#start)()和定时器计时是由计算[elapsed](qelapsedtimer.html#elapsed)()函数。
所经过的时间,也可用于重新计算可用于其它操作所需的时间,之后,第一个是完整的。当执行必须在一定的时间内完成,这是有用的,但需要几个步骤。该`waitFor`在类型的功能[QIODevice](qiodevice.html)和它的子类是需要这样的好例子。在这种情况下,代码可能如下:
```
void executeSlowOperations(int timeout)
{
QElapsedTimer timer;
timer.start();
slowOperation1();
int remainingTime = timeout - timer.elapsed();
if (remainingTime > 0)
slowOperation2(remainingTime);
}
```
另一个用例是执行某种操作的具体时间片。为此, QElapsedTimer提供[hasExpired](qelapsedtimer.html#hasExpired)()的便利功能,它可以被用于确定是否一个特定的毫秒已经过去了:
```
void executeOperationsForTime(int ms)
{
QElapsedTimer timer;
timer.start();
while (!timer.hasExpired(ms))
slowOperation1();
}
```
### Reference clocks
QElapsedTimer将使用该平台的单调参考时钟在所有支持它的平台上(见[QElapsedTimer.isMonotonic](qelapsedtimer.html#isMonotonic)())。这具有额外的好处, QElapsedTimer不受时间的调整,如在用户校正的时间。也不像[QTime](qtime.html), QElapsedTimer是免疫的变化时区设置,如日光节约时间。
另一方面,这意味着QElapsedTimer值只能与使用相同的参考其他值进行比较。这是尤其如此,如果因为参考的时间是从QElapsedTimer对象(摘录[QElapsedTimer.msecsSinceReference](qelapsedtimer.html#msecsSinceReference)( ) )和序列化。这些值不应该在网络上交换或保存到磁盘上,因为没有告诉计算机节点接收的数据是否是相同的一个始发它,或者如果它已经重新启动。
它是,但是,可以在同一台机器上运行的其他进程,条件是它们也使用相同的参考时钟交换价值。 QElapsedTimer将始终使用同一个时钟,因此它的安全与来自另一个进程的值来在同一台机器进行比较。如果比较其他的API产生的值,你应该检查所使用的时钟是相同的QElapsedTimer (见[QElapsedTimer.clockType](qelapsedtimer.html#clockType)())。
#### 32-bit overflows
一些该QElapsedTimer有一个有限的范围和击球的上限(通常为32位)后可能溢出的时钟。 QElapsedTimer处理这个溢出问题,并提出了一致的时机。然而,由于提取从QElapsedTimer参考时间时,在同一机器两个不同的过程可能有不同的理解的多少时间实际上已经过去了。
在其上的信息时钟类型可能会溢出,以及如何修复这个问题将随着时钟类型的记录。
* * *
## Type Documentation
```
QElapsedTimer.ClockType
```
这个枚举包含了不同的时钟类型[QElapsedTimer](qelapsedtimer.html)可以使用。
[QElapsedTimer](qelapsedtimer.html)将始终使用相同的时钟类型在特定的机器,所以这个值的程序的生命周期内不会改变。它被设置成使得[QElapsedTimer](qelapsedtimer.html)可以与其它非Qt的实现中使用,以保证该相同的参考时钟被使用。
| Constant | Value | Description |
| --- | --- | --- |
| `QElapsedTimer.SystemTime` | `0` | 人类可读的系统时间。这个时钟是不是单调的。 |
| `QElapsedTimer.MonotonicClock` | `1` | 该系统的单调时钟,通常是在Unix系统中找到。这个时钟是单调的,并且不会溢出。 |
| `QElapsedTimer.TickCounter` | `2` | 该系统的时钟计数器,在Windows和Symbian系统中使用。这个时钟可能会溢出。 |
| `QElapsedTimer.MachAbsoluteTime` | `3` | 在Mach内核的绝对时间( Mac OS X中) 。这个时钟是单调的,并且不会溢出。 |
| `QElapsedTimer.PerformanceCounter` | `4` | Windows提供的高分辨率性能计数器。这个时钟是单调的,并且不会溢出。 |
##### SystemTime
系统时间时钟是纯粹的实时性,自1970年1月1日在0:00 UTC毫秒表示。它等价于C和POSIX的返回值`time`功能,以毫秒为单位加入。这个时钟类型目前只用在不支持单调时钟Unix系统(见下文)。
这是唯一的非单调时钟[QElapsedTimer](qelapsedtimer.html)可以使用。
##### MonotonicClock
这是系统的单调时钟,因为任意一个点过去以毫秒为单位。这种类型的时钟是用在哪些支持POSIX的单调时钟( Unix系统`_POSIX_MONOTONIC_CLOCK`) 。
这个时钟不会溢出。
##### TickCounter
滴答计数器的时钟类型是基于系统的或处理器的时钟计数器,乘以一个刻度的持续时间。这个时钟类型用于在Windows和Symbian平台。如果高精度的性能计数器,可以在Windows上,`PerformanceCounter`时钟类型来代替。
该TickCounter时钟类型是可能会溢出的唯一时钟类型。 Windows Vista和Windows Server 2008中支持扩展的64位时钟计数器,它允许避免溢出。
在Windows系统中,时钟后2 ^ 32毫秒,这相当于大约49.7天溢出。这意味着,由于基准时间两个过程的推算可能是由不同的2 ^ 32毫秒的倍数。当比较这些值,它的建议,高32位的毫秒计数的被屏蔽掉。
在Symbian系统中,溢出发生后2 ^ 32的刻度,这期间可以从平台的HAL使用恒定HAL.ENanoTickPeriod获得的。在比较过程之间的值,有必要由蜱的持续时间来划分值和屏蔽掉的高32位。
##### MachAbsoluteTime
这个时钟类型是基于马赫内核,如在Mac OS X发现这个时钟类型是从MonotonicClock单独列示,因为Mac OS X是还涉及了UNIX系统,并且可以支持一个POSIX单调时钟值呈现不同的绝对时间从马赫绝对时间。
这个时钟是单调的,并且不会溢出。
##### PerformanceCounter
这个时钟使用Windows功能`QueryPerformanceCounter`和`QueryPerformanceFrequency`访问系统的高精度性能计数器。由于在所有的系统上,此计数器可能不可用,[QElapsedTimer](qelapsedtimer.html)将回落至`TickCounter`时钟自动地,如果该时钟不能使用。
这个时钟是单调的,并且不会溢出。
**See also** [clockType](qelapsedtimer.html#clockType)()和[isMonotonic](qelapsedtimer.html#isMonotonic)( ) 。
* * *
## Method Documentation
```
QElapsedTimer.__init__ (self)
```
```
QElapsedTimer.__init__ (self, QElapsedTimer)
```
```
ClockType QElapsedTimer.clockType ()
```
[](qelapsedtimer.html#ClockType-enum)
[返回时钟类型,这](qelapsedtimer.html#ClockType-enum)[QElapsedTimer](qelapsedtimer.html)实现使用。
**See also** [isMonotonic](qelapsedtimer.html#isMonotonic)( ) 。
```
int QElapsedTimer.elapsed (self)
```
返回的毫秒数,因为这[QElapsedTimer](qelapsedtimer.html)上次启动。在调用此函数[QElapsedTimer](qelapsedtimer.html)这被认定无效,将导致不确定的结果。
**See also** [start](qelapsedtimer.html#start)( )[restart](qelapsedtimer.html#restart)( )[hasExpired](qelapsedtimer.html#hasExpired)()和[invalidate](qelapsedtimer.html#invalidate)( ) 。
```
bool QElapsedTimer.hasExpired (self, int timeout)
```
返回True如果[QElapsedTimer](qelapsedtimer.html)已经过期了_timeout_毫秒(即,多于_timeout_毫秒已经过去了) 。价值_timeout_可以是-1 ,表明该计时器未到期,在这种情况下,该功能将始终返回False 。
**See also** [elapsed](qelapsedtimer.html#elapsed)( ) 。
```
QElapsedTimer.invalidate (self)
```
这个商标[QElapsedTimer](qelapsedtimer.html)对象为无效。
一个无效的对象可以进行检查[isValid](qelapsedtimer.html#isValid)( ) 。定时器的计算距今无效数据是不确定的,可能会产生奇特的效果。
**See also** [isValid](qelapsedtimer.html#isValid)( )[start](qelapsedtimer.html#start)()和[restart](qelapsedtimer.html#restart)( ) 。
```
bool QElapsedTimer.isMonotonic ()
```
返回True如果这是一个单调的时钟,否则返回False。看到在不同的时钟类型,了解哪些是单调的信息。
**See also** [clockType](qelapsedtimer.html#clockType)()和[QElapsedTimer.ClockType](qelapsedtimer.html#ClockType-enum)。
```
bool QElapsedTimer.isValid (self)
```
返回False,如果这个对象是无效通过调用[invalidate](qelapsedtimer.html#invalidate)() ,并没有被自启动。
**See also** [invalidate](qelapsedtimer.html#invalidate)( )[start](qelapsedtimer.html#start)()和[restart](qelapsedtimer.html#restart)( ) 。
```
int QElapsedTimer.msecsSinceReference (self)
```
返回毫秒的最后一次这样的数[QElapsedTimer](qelapsedtimer.html)对象开始,其参考时钟的开始。
这个数字通常是任意的所有时钟的除外[QElapsedTimer.SystemTime](qelapsedtimer.html#ClockType-enum)时钟。对于时钟类型,这个数字是毫秒自1970年1月1日在0:00 UTC的数量(即,它是表示以毫秒为单位的Unix时间) 。
**See also** [clockType](qelapsedtimer.html#clockType)()和[elapsed](qelapsedtimer.html#elapsed)( ) 。
```
int QElapsedTimer.msecsTo (self, QElapsedTimer other)
```
返回毫秒这之间的数[QElapsedTimer](qelapsedtimer.html)和_other_。如果_other_这个对象之前开始,返回值将是积极的。如果是起步较晚,返回值将是负数。
返回值是不确定的,如果这个对象或_other_已失效。
**See also** [secsTo](qelapsedtimer.html#secsTo)()和[elapsed](qelapsedtimer.html#elapsed)( ) 。
```
int QElapsedTimer.nsecsElapsed (self)
```
返回纳秒数,因为这[QElapsedTimer](qelapsedtimer.html)上次启动。在调用此函数[QElapsedTimer](qelapsedtimer.html)这被认定无效,将导致不确定的结果。
在不提供纳秒分辨率的平台,返回的值将是现有的最佳估计。
此功能被引入Qt的4.8 。
**See also** [start](qelapsedtimer.html#start)( )[restart](qelapsedtimer.html#restart)( )[hasExpired](qelapsedtimer.html#hasExpired)()和[invalidate](qelapsedtimer.html#invalidate)( ) 。
```
int QElapsedTimer.restart (self)
```
重新启动定时器,并返回自上一次开始所经过的时间。此函数等同于获得的经过时间以[elapsed](qelapsedtimer.html#elapsed)( ) ,然后重新启动定时器[start](qelapsedtimer.html#start)() ,但它这样做在一个单一的操作中,避免了需要获得时钟值的两倍。
下面的例子演示了如何使用这个功能来校准参数,以一个缓慢的操作(例如,迭代次数),因此这种操作至少需要250毫秒:
```
[QElapsedTimer](qelapsedtimer.html) timer;
int count = 1;
timer.start();
do {
count *= 2;
slowOperation2(count);
} while (timer.restart() < 250);
return count;
```
**See also** [start](qelapsedtimer.html#start)( )[invalidate](qelapsedtimer.html#invalidate)()和[elapsed](qelapsedtimer.html#elapsed)( ) 。
```
int QElapsedTimer.secsTo (self, QElapsedTimer other)
```
返回秒这之间的数[QElapsedTimer](qelapsedtimer.html)和_other_。如果_other_这个对象之前开始,返回值将是积极的。如果是起步较晚,返回值将是负数。
返回值是不确定的,如果这个对象或_other_已失效。
**See also** [msecsTo](qelapsedtimer.html#msecsTo)()和[elapsed](qelapsedtimer.html#elapsed)( ) 。
```
QElapsedTimer.start (self)
```
启动此定时器。一旦开始,一个计时器的值可以与被检查[elapsed](qelapsedtimer.html#elapsed)()或[msecsSinceReference](qelapsedtimer.html#msecsSinceReference)( ) 。
通常情况下,一个定时器被启动只是一个冗长的操作,如前:
```
[QElapsedTimer](qelapsedtimer.html) timer;
timer.start();
slowOperation1();
qDebug() << "The slow operation took" << timer.elapsed() << "milliseconds";
```
此外,启动定时器使它再次有效。
**See also** [restart](qelapsedtimer.html#restart)( )[invalidate](qelapsedtimer.html#invalidate)()和[elapsed](qelapsedtimer.html#elapsed)( ) 。
```
bool QElapsedTimer.__eq__ (self, QElapsedTimer other)
```
```
bool QElapsedTimer.__ge__ (self, QElapsedTimer v2)
```
```
bool QElapsedTimer.__lt__ (self, QElapsedTimer v2)
```
```
bool QElapsedTimer.__ne__ (self, QElapsedTimer other)
```
- PyQt4 中文文档
- PyQt Class Reference
- QAbstractAnimation Class Reference
- QAbstractButton Class Reference
- QAbstractEventDispatcher Class Reference
- QAbstractExtensionFactory Class Reference
- QAbstractExtensionManager Class Reference
- QAbstractFileEngine Class Reference
- QAbstractFileEngineHandler Class Reference
- QAbstractFileEngineIterator Class Reference
- QAbstractFormBuilder Class Reference
- QAbstractGraphicsShapeItem Class Reference
- QAbstractItemDelegate Class Reference
- QAbstractItemModel Class Reference
- QAbstractItemView Class Reference
- QAbstractListModel Class Reference
- QAbstractMessageHandler Class Reference
- QAbstractNetworkCache Class Reference
- QAbstractPrintDialog Class Reference
- QAbstractProxyModel Class Reference
- QAbstractScrollArea Class Reference
- QAbstractSlider Class Reference
- QAbstractSocket Class Reference
- QAbstractSpinBox Class Reference
- QAbstractState Class Reference
- QAbstractTableModel Class Reference
- QAbstractTextDocumentLayout Class Reference
- QAbstractTransition Class Reference
- QAbstractUriResolver Class Reference
- QAbstractVideoBuffer Class Reference
- QAbstractVideoSurface Class Reference
- QAbstractXmlNodeModel Class Reference
- QAbstractXmlReceiver Class Reference
- QAction Class Reference
- QActionEvent Class Reference
- QActionGroup Class Reference
- QAnimationGroup Class Reference
- QApplication Class Reference
- QAssistantClient Class Reference
- QAudio Class Reference
- QAudioDeviceInfo Class Reference
- QAudioFormat Class Reference
- QAudioInput Class Reference
- QAudioOutput Class Reference
- QAuthenticator Class Reference
- QBasicTimer Class Reference
- QBitArray Class Reference
- QBitmap Class Reference
- QBoxLayout Class Reference
- QBrush Class Reference
- QBuffer Class Reference
- QButtonGroup Class Reference
- QByteArray Class Reference
- QByteArrayMatcher Class Reference
- QCalendarWidget Class Reference
- QChar Class Reference
- QCheckBox Class Reference
- QChildEvent Class Reference
- QClipboard Class Reference
- QCloseEvent Class Reference
- QColor Class Reference
- QColorDialog Class Reference
- QColumnView Class Reference
- QComboBox Class Reference
- QCommandLinkButton Class Reference
- QCommonStyle Class Reference
- QCompleter Class Reference
- QConicalGradient Class Reference
- QContextMenuEvent Class Reference
- QCoreApplication Class Reference
- QCryptographicHash Class Reference
- QCursor Class Reference
- QDataStream Class Reference
- QDataWidgetMapper Class Reference
- QDate Class Reference
- QDateEdit Class Reference
- QDateTime Class Reference
- QDateTimeEdit Class Reference
- QDBus Class Reference
- QDBusAbstractAdaptor Class Reference
- QDBusAbstractInterface Class Reference
- QDBusArgument Class Reference
- QDBusConnection Class Reference
- QDBusConnectionInterface Class Reference
- QDBusError Class Reference
- QDBusInterface Class Reference
- QDBusMessage Class Reference
- QDBusObjectPath Class Reference
- QDBusPendingCall Class Reference
- QDBusPendingCallWatcher Class Reference
- QDBusPendingReply Class Reference
- QDBusReply Class Reference
- QDBusServiceWatcher Class Reference
- QDBusSignature Class Reference
- QDBusUnixFileDescriptor Class Reference
- QDBusVariant Class Reference
- QDeclarativeComponent Class Reference
- QDeclarativeContext Class Reference
- QDeclarativeEngine Class Reference
- QDeclarativeError Class Reference
- QDeclarativeExpression Class Reference
- QDeclarativeExtensionPlugin Class Reference
- QDeclarativeImageProvider Class Reference
- QDeclarativeItem Class Reference
- QDeclarativeListReference Class Reference
- QDeclarativeNetworkAccessManagerFactory Class Reference
- QDeclarativeParserStatus Class Reference
- QDeclarativeProperty Class Reference
- QDeclarativePropertyMap Class Reference
- QDeclarativePropertyValueSource Class Reference
- QDeclarativeScriptString Class Reference
- QDeclarativeView Class Reference
- QDesignerActionEditorInterface Class Reference
- QDesignerContainerExtension Class Reference
- QDesignerCustomWidgetCollectionInterface Class Reference
- QDesignerCustomWidgetInterface Class Reference
- QDesignerFormEditorInterface Class Reference
- QDesignerFormWindowCursorInterface Class Reference
- QDesignerFormWindowInterface Class Reference
- QDesignerFormWindowManagerInterface Class Reference
- QDesignerMemberSheetExtension Class Reference
- QDesignerObjectInspectorInterface Class Reference
- QDesignerPropertyEditorInterface Class Reference
- QDesignerPropertySheetExtension Class Reference
- QDesignerTaskMenuExtension Class Reference
- QDesignerWidgetBoxInterface Class Reference
- QDesktopServices Class Reference
- QDesktopWidget Class Reference
- QDial Class Reference
- QDialog Class Reference
- QDialogButtonBox Class Reference
- QDir Class Reference
- QDirIterator Class Reference
- QDirModel Class Reference
- QDockWidget Class Reference
- QDomAttr Class Reference
- QDomCDATASection Class Reference
- QDomCharacterData Class Reference
- QDomComment Class Reference
- QDomDocument Class Reference
- QDomDocumentFragment Class Reference
- QDomDocumentType Class Reference
- QDomElement Class Reference
- QDomEntity Class Reference
- QDomEntityReference Class Reference
- QDomImplementation Class Reference
- QDomNamedNodeMap Class Reference
- QDomNode Class Reference
- QDomNodeList Class Reference
- QDomNotation Class Reference
- QDomProcessingInstruction Class Reference
- QDomText Class Reference
- QDoubleSpinBox Class Reference
- QDoubleValidator Class Reference
- QDrag Class Reference
- QDragEnterEvent Class Reference
- QDragLeaveEvent Class Reference
- QDragMoveEvent Class Reference
- QDropEvent Class Reference
- QDynamicPropertyChangeEvent Class Reference
- QEasingCurve Class Reference
- QElapsedTimer Class Reference
- QErrorMessage Class Reference
- QEvent Class Reference
- QEventLoop Class Reference
- QEventTransition Class Reference
- QExtensionFactory Class Reference
- QExtensionManager Class Reference
- QFile Class Reference
- QFileDialog Class Reference
- QFileIconProvider Class Reference
- QFileInfo Class Reference
- QFileOpenEvent Class Reference
- QFileSystemModel Class Reference
- QFileSystemWatcher Class Reference
- QFinalState Class Reference
- QFocusEvent Class Reference
- QFocusFrame Class Reference
- QFont Class Reference
- QFontComboBox Class Reference
- QFontDatabase Class Reference
- QFontDialog Class Reference
- QFontInfo Class Reference
- QFontMetrics Class Reference
- QFontMetricsF Class Reference
- QFormBuilder Class Reference
- QFormLayout Class Reference
- QFrame Class Reference
- QFSFileEngine Class Reference
- QFtp Class Reference
- QGenericArgument Class Reference
- QGenericReturnArgument Class Reference
- QGesture Class Reference
- QGestureEvent Class Reference
- QGestureRecognizer Class Reference
- QGL Class Reference
- QGLBuffer Class Reference
- QGLColormap Class Reference
- QGLContext Class Reference
- QGLFormat Class Reference
- QGLFramebufferObject Class Reference
- QGLFramebufferObjectFormat Class Reference
- QGLPixelBuffer Class Reference
- QGLShader Class Reference
- QGLShaderProgram Class Reference
- QGLWidget Class Reference
- QGlyphRun Class Reference
- QGradient Class Reference
- QGraphicsAnchor Class Reference
- QGraphicsAnchorLayout Class Reference
- QGraphicsBlurEffect Class Reference
- QGraphicsColorizeEffect Class Reference
- QGraphicsDropShadowEffect Class Reference
- QGraphicsEffect Class Reference
- QGraphicsEllipseItem Class Reference
- QGraphicsGridLayout Class Reference
- QGraphicsItem Class Reference
- QGraphicsItemAnimation Class Reference
- QGraphicsItemGroup Class Reference
- QGraphicsLayout Class Reference
- QGraphicsLayoutItem Class Reference
- QGraphicsLinearLayout Class Reference
- QGraphicsLineItem Class Reference
- QGraphicsObject Class Reference
- QGraphicsOpacityEffect Class Reference
- QGraphicsPathItem Class Reference
- QGraphicsPixmapItem Class Reference
- QGraphicsPolygonItem Class Reference
- QGraphicsProxyWidget Class Reference
- QGraphicsRectItem Class Reference
- QGraphicsRotation Class Reference
- QGraphicsScale Class Reference
- QGraphicsScene Class Reference
- QGraphicsSceneContextMenuEvent Class Reference
- QGraphicsSceneDragDropEvent Class Reference
- QGraphicsSceneEvent Class Reference
- QGraphicsSceneHelpEvent Class Reference
- QGraphicsSceneHoverEvent Class Reference
- QGraphicsSceneMouseEvent Class Reference
- QGraphicsSceneMoveEvent Class Reference
- QGraphicsSceneResizeEvent Class Reference
- QGraphicsSceneWheelEvent Class Reference
- QGraphicsSimpleTextItem Class Reference
- QGraphicsSvgItem Class Reference
- QGraphicsTextItem Class Reference
- QGraphicsTransform Class Reference
- QGraphicsView Class Reference
- QGraphicsWebView Class Reference
- QGraphicsWidget Class Reference
- QGridLayout Class Reference
- QGroupBox Class Reference
- QHBoxLayout Class Reference
- QHeaderView Class Reference
- QHelpContentItem Class Reference
- QHelpContentModel Class Reference
- QHelpContentWidget Class Reference
- QHelpEngine Class Reference
- QHelpEngineCore Class Reference
- QHelpEvent Class Reference
- QHelpIndexModel Class Reference
- QHelpIndexWidget Class Reference
- QHelpSearchEngine Class Reference
- QHelpSearchQuery Class Reference
- QHelpSearchQueryWidget Class Reference
- QHelpSearchResultWidget Class Reference
- QHideEvent Class Reference
- QHistoryState Class Reference
- QHostAddress Class Reference
- QHostInfo Class Reference
- QHoverEvent Class Reference
- QHttp Class Reference
- QHttpHeader Class Reference
- QHttpMultiPart Class Reference
- QHttpPart Class Reference
- QHttpRequestHeader Class Reference
- QHttpResponseHeader Class Reference
- QIcon Class Reference
- QIconDragEvent Class Reference
- QIconEngine Class Reference
- QIconEngineV2 Class Reference
- QIdentityProxyModel Class Reference
- QImage Class Reference
- QImageIOHandler Class Reference
- QImageReader Class Reference
- QImageWriter Class Reference
- QInputContext Class Reference
- QInputContextFactory Class Reference
- QInputDialog Class Reference
- QInputEvent Class Reference
- QInputMethodEvent Class Reference
- QIntValidator Class Reference
- QIODevice Class Reference
- QItemDelegate Class Reference
- QItemEditorCreatorBase Class Reference
- QItemEditorFactory Class Reference
- QItemSelection Class Reference
- QItemSelectionModel Class Reference
- QItemSelectionRange Class Reference
- QKeyEvent Class Reference
- QKeyEventTransition Class Reference
- QKeySequence Class Reference
- QLabel Class Reference
- QLatin1Char Class Reference
- QLatin1String Class Reference
- QLayout Class Reference
- QLayoutItem Class Reference
- QLCDNumber Class Reference
- QLibrary Class Reference
- QLibraryInfo Class Reference
- QLine Class Reference
- QLinearGradient Class Reference
- QLineEdit Class Reference
- QLineF Class Reference
- QListView Class Reference
- QListWidget Class Reference
- QListWidgetItem Class Reference
- QLocale Class Reference
- QLocalServer Class Reference
- QLocalSocket Class Reference
- QMainWindow Class Reference
- QMargins Class Reference
- QMatrix Class Reference
- QMatrix2x2 Class Reference
- QMatrix2x3 Class Reference
- QMatrix2x4 Class Reference
- QMatrix3x2 Class Reference
- QMatrix3x3 Class Reference
- QMatrix3x4 Class Reference
- QMatrix4x2 Class Reference
- QMatrix4x3 Class Reference
- QMatrix4x4 Class Reference
- QMdiArea Class Reference
- QMdiSubWindow Class Reference
- QMenu Class Reference
- QMenuBar Class Reference
- QMessageBox Class Reference
- QMetaClassInfo Class Reference
- QMetaEnum Class Reference
- QMetaMethod Class Reference
- QMetaObject Class Reference
- QMetaProperty Class Reference
- QMetaType Class Reference
- QMimeData Class Reference
- QMimeSource Class Reference
- QModelIndex Class Reference
- QMouseEvent Class Reference
- QMouseEventTransition Class Reference
- QMoveEvent Class Reference
- QMovie Class Reference
- QMutex Class Reference
- QMutexLocker Class Reference
- QNetworkAccessManager Class Reference
- QNetworkAddressEntry Class Reference
- QNetworkCacheMetaData Class Reference
- QNetworkConfiguration Class Reference
- QNetworkConfigurationManager Class Reference
- QNetworkCookie Class Reference
- QNetworkCookieJar Class Reference
- QNetworkDiskCache Class Reference
- QNetworkInterface Class Reference
- QNetworkProxy Class Reference
- QNetworkProxyFactory Class Reference
- QNetworkProxyQuery Class Reference
- QNetworkReply Class Reference
- QNetworkRequest Class Reference
- QNetworkSession Class Reference
- QObject Class Reference
- QObjectCleanupHandler Class Reference
- QPageSetupDialog Class Reference
- QPaintDevice Class Reference
- QPaintEngine Class Reference
- QPaintEngineState Class Reference
- QPainter Class Reference
- QPainterPath Class Reference
- QPainterPathStroker Class Reference
- QPaintEvent Class Reference
- QPalette Class Reference
- QPanGesture Class Reference
- QParallelAnimationGroup Class Reference
- QPauseAnimation Class Reference
- QPen Class Reference
- QPersistentModelIndex Class Reference
- QPicture Class Reference
- QPictureIO Class Reference
- QPinchGesture Class Reference
- QPixmap Class Reference
- QPixmapCache Class Reference
- QPlainTextDocumentLayout Class Reference
- QPlainTextEdit Class Reference
- QPluginLoader Class Reference
- QPoint Class Reference
- QPointF Class Reference
- QPolygon Class Reference
- QPolygonF Class Reference
- QPrintDialog Class Reference
- QPrintEngine Class Reference
- QPrinter Class Reference
- QPrinterInfo Class Reference
- QPrintPreviewDialog Class Reference
- QPrintPreviewWidget Class Reference
- QProcess Class Reference
- QProcessEnvironment Class Reference
- QProgressBar Class Reference
- QProgressDialog Class Reference
- QPropertyAnimation Class Reference
- QProxyModel Class Reference
- QPushButton Class Reference
- QPyDeclarativePropertyValueSource Class Reference
- QPyDesignerContainerExtension Class Reference
- QPyDesignerCustomWidgetCollectionPlugin Class Reference
- QPyDesignerCustomWidgetPlugin Class Reference
- QPyDesignerMemberSheetExtension Class Reference
- QPyDesignerPropertySheetExtension Class Reference
- QPyDesignerTaskMenuExtension Class Reference
- QPyNullVariant Class Reference
- QPyTextObject Class Reference
- QQuaternion Class Reference
- QRadialGradient Class Reference
- QRadioButton Class Reference
- QRawFont Class Reference
- QReadLocker Class Reference
- QReadWriteLock Class Reference
- QRect Class Reference
- QRectF Class Reference
- QRegExp Class Reference
- QRegExpValidator Class Reference
- QRegion Class Reference
- QResizeEvent Class Reference
- QResource Class Reference
- QRubberBand Class Reference
- QRunnable Class Reference
- QScriptClass Class Reference
- QScriptClassPropertyIterator Class Reference
- QScriptContext Class Reference
- QScriptContextInfo Class Reference
- QScriptEngine Class Reference
- QScriptEngineAgent Class Reference
- QScriptEngineDebugger Class Reference
- QScriptString Class Reference
- QScriptSyntaxCheckResult Class Reference
- QScriptValue Class Reference
- QScriptValueIterator Class Reference
- QScrollArea Class Reference
- QScrollBar Class Reference
- QSemaphore Class Reference
- QSequentialAnimationGroup Class Reference
- QSessionManager Class Reference
- QSettings Class Reference
- QSharedMemory Class Reference
- QShortcut Class Reference
- QShortcutEvent Class Reference
- QShowEvent Class Reference
- QSignalMapper Class Reference
- QSignalTransition Class Reference
- QSimpleXmlNodeModel Class Reference
- QSize Class Reference
- QSizeF Class Reference
- QSizeGrip Class Reference
- QSizePolicy Class Reference
- QSlider Class Reference
- QSocketNotifier Class Reference
- QSortFilterProxyModel Class Reference
- QSound Class Reference
- QSourceLocation Class Reference
- QSpacerItem Class Reference
- QSpinBox Class Reference
- QSplashScreen Class Reference
- QSplitter Class Reference
- QSplitterHandle Class Reference
- QSql Class Reference
- QSqlDatabase Class Reference
- QSqlDriver Class Reference
- QSqlDriverCreatorBase Class Reference
- QSqlError Class Reference
- QSqlField Class Reference
- QSqlIndex Class Reference
- QSqlQuery Class Reference
- QSqlQueryModel Class Reference
- QSqlRecord Class Reference
- QSqlRelation Class Reference
- QSqlRelationalDelegate Class Reference
- QSqlRelationalTableModel Class Reference
- QSqlResult Class Reference
- QSqlTableModel Class Reference
- Qt4.7文档翻译:Qt样式单参考,Qt Style Sheets Reference
- QSsl Class Reference
- QSslCertificate Class Reference
- QSslCipher Class Reference
- QSslConfiguration Class Reference
- QSslError Class Reference
- QSslKey Class Reference
- QSslSocket Class Reference
- QStackedLayout Class Reference
- QStackedWidget Class Reference
- QStandardItem Class Reference
- QStandardItemModel Class Reference
- QState Class Reference
- QStateMachine Class Reference
- QStaticText Class Reference
- QStatusBar Class Reference
- QStatusTipEvent Class Reference
- QString Class Reference
- QStringList Class Reference
- QStringListModel Class Reference
- QStringMatcher Class Reference
- QStringRef Class Reference
- QStyle Class Reference
- QStyledItemDelegate Class Reference
- QStyleFactory Class Reference
- QStyleHintReturn Class Reference
- QStyleHintReturnMask Class Reference
- QStyleHintReturnVariant Class Reference
- QStyleOption Class Reference
- QStyleOptionButton Class Reference
- QStyleOptionComboBox Class Reference
- QStyleOptionComplex Class Reference
- QStyleOptionDockWidget Class Reference
- QStyleOptionDockWidgetV2 Class Reference
- QStyleOptionFocusRect Class Reference
- QStyleOptionFrame Class Reference
- QStyleOptionFrameV2 Class Reference
- QStyleOptionFrameV3 Class Reference
- QStyleOptionGraphicsItem Class Reference
- QStyleOptionGroupBox Class Reference
- QStyleOptionHeader Class Reference
- QStyleOptionMenuItem Class Reference
- QStyleOptionProgressBar Class Reference
- QStyleOptionProgressBarV2 Class Reference
- QStyleOptionRubberBand Class Reference
- QStyleOptionSizeGrip Class Reference
- QStyleOptionSlider Class Reference
- QStyleOptionSpinBox Class Reference
- QStyleOptionTab Class Reference
- QStyleOptionTabBarBase Class Reference
- QStyleOptionTabBarBaseV2 Class Reference
- QStyleOptionTabV2 Class Reference
- QStyleOptionTabV3 Class Reference
- QStyleOptionTabWidgetFrame Class Reference
- QStyleOptionTabWidgetFrameV2 Class Reference
- QStyleOptionTitleBar Class Reference
- QStyleOptionToolBar Class Reference
- QStyleOptionToolBox Class Reference
- QStyleOptionToolBoxV2 Class Reference
- QStyleOptionToolButton Class Reference
- QStyleOptionViewItem Class Reference
- QStyleOptionViewItemV2 Class Reference
- QStyleOptionViewItemV3 Class Reference
- QStyleOptionViewItemV4 Class Reference
- QStylePainter Class Reference
- QSvgGenerator Class Reference
- QSvgRenderer Class Reference
- QSvgWidget Class Reference
- QSwipeGesture Class Reference
- QSyntaxHighlighter Class Reference
- QSysInfo Class Reference
- QSystemLocale Class Reference
- QSystemSemaphore Class Reference
- QSystemTrayIcon Class Reference
- Qt Class Reference
- QTabBar Class Reference
- QTabletEvent Class Reference
- QTableView Class Reference
- QTableWidget Class Reference
- QTableWidgetItem Class Reference
- QTableWidgetSelectionRange Class Reference
- QTabWidget Class Reference
- QTapAndHoldGesture Class Reference
- QTapGesture Class Reference
- QTcpServer Class Reference
- QTcpSocket Class Reference
- QTemporaryFile Class Reference
- QTest Class Reference
- QTextBlock Class Reference
- QTextBlockFormat Class Reference
- QTextBlockGroup Class Reference
- QTextBlockUserData Class Reference
- QTextBoundaryFinder Class Reference
- QTextBrowser Class Reference
- QTextCharFormat Class Reference
- QTextCodec Class Reference
- QTextCursor Class Reference
- QTextDecoder Class Reference
- QTextDocument Class Reference
- QTextDocumentFragment Class Reference
- QTextDocumentWriter Class Reference
- QTextEdit Class Reference
- QTextEncoder Class Reference
- QTextFormat Class Reference
- QTextFragment Class Reference
- QTextFrame Class Reference
- QTextFrameFormat Class Reference
- QTextImageFormat Class Reference
- QTextInlineObject Class Reference
- QTextItem Class Reference
- QTextLayout Class Reference
- QTextLength Class Reference
- QTextLine Class Reference
- QTextList Class Reference
- QTextListFormat Class Reference
- QTextObject Class Reference
- QTextObjectInterface Class Reference
- QTextOption Class Reference
- QTextStream Class Reference
- QTextTable Class Reference
- QTextTableCell Class Reference
- QTextTableCellFormat Class Reference
- QTextTableFormat Class Reference
- QThread Class Reference
- QThreadPool Class Reference
- QTime Class Reference
- QTimeEdit Class Reference
- QTimeLine Class Reference
- QTimer Class Reference
- QTimerEvent Class Reference
- QToolBar Class Reference
- QToolBox Class Reference
- QToolButton Class Reference
- QToolTip Class Reference
- QTouchEvent Class Reference
- Reference
- QTransform Class Reference
- QTranslator Class Reference
- QTreeView Class Reference
- QTreeWidget Class Reference
- QTreeWidgetItem Class Reference
- QTreeWidgetItemIterator Class Reference
- QUdpSocket Class Reference
- QUndoCommand Class Reference
- QUndoGroup Class Reference
- QUndoStack Class Reference
- QUndoView Class Reference
- QUrl Class Reference
- QUrlInfo Class Reference
- QUuid Class Reference
- QValidator Class Reference
- QVariant Class Reference
- QVariantAnimation Class Reference
- QVBoxLayout Class Reference
- QVector2D Class Reference
- QVector3D Class Reference
- QVector4D Class Reference
- QVideoFrame Class Reference
- QVideoSurfaceFormat Class Reference
- QWaitCondition Class Reference
- QWebDatabase Class Reference
- QWebElement Class Reference
- QWebElementCollection Class Reference
- QWebFrame Class Reference
- QWebHistory Class Reference
- QWebHistoryInterface Class Reference
- QWebHistoryItem Class Reference
- QWebHitTestResult Class Reference
- QWebInspector Class Reference
- QWebPage Class Reference
- QWebPluginFactory Class Reference
- QWebSecurityOrigin Class Reference
- QWebSettings Class Reference
- QWebView Class Reference
- QWhatsThis Class Reference
- QWhatsThisClickedEvent Class Reference
- QWheelEvent Class Reference
- QWidget Class Reference
- QWidgetAction Class Reference
- QWidgetItem Class Reference
- QWindowStateChangeEvent Class Reference
- QWizard Class Reference
- QWizardPage Class Reference
- QWorkspace Class Reference
- QWriteLocker Class Reference
- QX11EmbedContainer Class Reference
- QX11EmbedWidget Class Reference
- QX11Info Class Reference
- QXmlAttributes Class Reference
- QXmlContentHandler Class Reference
- QXmlDeclHandler Class Reference
- QXmlDefaultHandler Class Reference
- QXmlDTDHandler Class Reference
- QXmlEntityResolver Class Reference
- QXmlErrorHandler Class Reference
- QXmlFormatter Class Reference
- QXmlInputSource Class Reference
- QXmlItem Class Reference
- QXmlLexicalHandler Class Reference
- QXmlLocator Class Reference
- QXmlName Class Reference
- QXmlNamePool Class Reference
- QXmlNamespaceSupport Class Reference
- QXmlNodeModelIndex Class Reference
- QXmlParseException Class Reference
- QXmlQuery Class Reference
- QXmlReader Class Reference
- QXmlResultItems Class Reference
- QXmlSchema Class Reference
- QXmlSchemaValidator Class Reference
- QXmlSerializer Class Reference
- QXmlSimpleReader Class Reference
- QXmlStreamAttribute Class Reference
- QXmlStreamAttributes Class Reference
- QXmlStreamEntityDeclaration Class Reference
- QXmlStreamEntityResolver Class Reference
- QXmlStreamNamespaceDeclaration Class Reference
- QXmlStreamNotationDeclaration Class Reference
- QXmlStreamReader Class Reference
- QXmlStreamWriter Class Reference