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- QAccel类
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- qdatabrowser.h Include File
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- QDataStream类
- qdatastream.h包含文件
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- qdial.h Include File
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- QDialog类
- qdialog.h包含文件
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- qdirectpainter_qws.h Include File
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- qdir.h包含文件
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- qdockarea.h包含文件
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- qdockwindow.h包含文件
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- QDomAttr Class
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- qdom.h Include File
- QDomImplementation Class
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- QDomNamedNodeMap Class
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- QDomNode Class
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- QDomNotation Class
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- QDomText Class
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- QDoubleValidator类
- QDoubleValidator成员列表
- QDragEnterEvent Class
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- QDragMoveEvent Class
- QDragMoveEvent Member List
- QDragObject Class
- qdragobject.h Include File
- QDragObject Member List
- qdrawutil.h Include File
- QDropEvent Class
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- QDropSite Class
- qdropsite.h Include File
- QEditorFactory Class
- qeditorfactory.h Include File
- QEditorFactory Member List
- QEmbed - File and Image Embedder
- QErrorMessage类
- qerrormessage.h包含文件
- QErrorMessage成员列表
- QEucJpCodec Class
- qeucjpcodec.h Include File
- QEucJpCodec Member List
- QEucKrCodec Class
- qeuckrcodec.h Include File
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- QEvent类
- qevent.h包含文件
- QEvent成员列表
- Font Displayer
- QFile类
- QFileDialog类
- qfiledialog.h包含文件
- QFileDialog成员列表
- qfile.h包含文件
- QFileIconProvider Class
- QFileIconProvider Member List
- QFileInfo Class
- qfileinfo.h Include File
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- QFile成员列表
- QFilePreview Class
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- QFocusData Class
- qfocusdata.h Include File
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- QFocusEvent Class
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- QFont Class
- QFontDatabase Class
- qfontdatabase.h Include File
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- QFontDialog类
- qfontdialog.h包含文件
- QFontDialog成员列表
- QFont Examples
- qfont.h Include File
- QFontInfo Class
- qfontinfo.h Include File
- QFontInfo Member List
- QFontManager Class
- qfontmanager_qws.h Include File
- QFontManager Member List
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- QFontMetrics Class
- qfontmetrics.h Include File
- QFontMetrics Member List
- QFrame类
- qframe.h包含文件
- QFrame成员列表
- QFtp类
- qftp.h包含文件
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- QGb18030Codec Class
- qgb18030codec.h Include File
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- QGbkCodec Class
- QGbkCodec Member List
- qgfx_qws.h Include File
- QGL Class
- QGLayoutIterator Class
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- QGLColormap Class
- qglcolormap.h Include File
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- QGLContext Class
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- QGLFormat Class
- QGLFormat Member List
- qgl.h Include File
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- qglobal.h Include File
- QGLWidget Class
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- QGrid类
- qgrid.h包含文件
- QGridLayout Class
- QGridLayout Member List
- QGrid成员列表
- QGridView Class
- qgridview.h Include File
- QGridView Member List
- QGroupBox类
- qgroupbox.h包含文件
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- QGuardedPtr类
- qguardedptr.h包含文件
- QGuardedPtr成员列表
- QHBox Class
- qhbox.h Include File
- QHBoxLayout Class
- QHBoxLayout Member List
- QHBox Member List
- QHButtonGroup类
- qhbuttongroup.h包含文件
- QHButtonGroup成员列表
- QHeader类
- qheader.h包含文件
- QHeader成员列表
- QHebrewCodec Class
- QHebrewCodec Member List
- QHGroupBox类
- qhgroupbox.h包含文件
- QHGroupBox成员列表
- QHideEvent Class
- QHideEvent Member List
- QHostAddress Class
- qhostaddress.h Include File
- QHostAddress Member List
- QHttp Class
- qhttp.h Include File
- QHttp Member List
- QIconDrag Class
- QIconDragItem Class
- QIconDragItem Member List
- QIconDrag Member List
- QIconSet Class
- qiconset.h Include File
- QIconSet Member List
- QIconView Class
- qiconview.h Include File
- QIconViewItem Class
- QIconViewItem Member List
- QIconView Member List
- QImage Class
- QImageConsumer Class
- QImageConsumer Member List
- QImageDecoder Class
- QImageDecoder Member List
- QImageDrag Class
- QImageDrag Member List
- QImageFormat Class
- QImageFormat Member List
- QImageFormatPlugin Class
- qimageformatplugin.h Include File
- QImageFormatPlugin Member List
- QImageFormatType Class
- QImageFormatType Member List
- qimage.h Include File
- QImageIO Class
- QImageIO Member List
- QImage Member List
- QIMEvent Class
- QIMEvent Member List
- QInputDialog类
- qinputdialog.h包含文件
- QInputDialog成员列表
- QIntCache Class
- qintcache.h Include File
- QIntCacheIterator Class
- QIntCacheIterator Member List
- QIntCache Member List
- QIntDict Class
- qintdict.h Include File
- QIntDictIterator Class
- QIntDictIterator Member List
- QIntDict Member List
- QIntValidator类
- QIntValidator成员列表
- QIODevice类
- qiodevice.h包含文件
- QIODevice成员列表
- QIODeviceSource Class
- QJisCodec Class
- qjiscodec.h Include File
- QJisCodec Member List
- qkeyboard_qws.h Include File
- QKeyEvent Class
- QKeyEvent Member List
- QKeySequence Class
- qkeysequence.h Include File
- QKeySequence Member List
- QLabel Class
- qlabel.h Include File
- QLabel Member List
- QLayout Class
- qlayout.h Include File
- QLayoutItem Class
- QLayoutItem Member List
- QLayoutIterator Class
- QLayoutIterator Member List
- QLayout Member List
- QLCDNumber Class
- qlcdnumber.h Include File
- QLCDNumber Member List
- QLibrary Class
- qlibrary.h Include File
- QLibrary Member List
- QLineEdit Class
- qlineedit.h Include File
- QLineEdit Member List
- QListBox Class
- qlistbox.h Include File
- QListBoxItem Class
- QListBoxItem Member List
- QListBox Member List
- QListBoxPixmap Class
- QListBoxPixmap Member List
- QListBoxText Class
- QListBoxText Member List
- QListView Class
- qlistview.h Include File
- QListViewItem Class
- QListViewItemIterator Class
- QListViewItemIterator Member List
- QListViewItem Member List
- QListView Member List
- QLocalFs Class
- qlocalfs.h Include File
- QLocalFs Member List
- QLock Class
- qlock_qws.h Include File
- QLock Member List
- QMag
- QMainWindow类
- qmainwindow.h包含文件
- QMainWindow成员列表
- qmake的介绍
- 安装qmake
- 10分钟学会使用qmake
- qmake教程
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- QMap Class
- QMapConstIterator Class
- QMapConstIterator Member List
- qmap.h Include File
- QMapIterator Class
- QMapIterator Member List
- QMap Member List
- QMemArray类
- qmemarray.h包含文件
- QMemArray成员列表
- QMenuBar Class
- qmenubar.h Include File
- QMenuBar Member List
- QMenuData Class
- qmenudata.h Include File
- QMenuData Member List
- QMessageBox类
- qmessagebox.h包含文件
- QMessageBox成员列表
- QMetaObject Class
- qmetaobject.h Include File
- QMetaObject Member List
- QMetaProperty Class
- QMetaProperty Member List
- qmime.h Include File
- QMimeSource Class
- QMimeSourceFactory Class
- QMimeSourceFactory Member List
- QMimeSource Member List
- QMotifPlusStyle Class
- qmotifplusstyle.h Include File
- QMotifPlusStyle Member List
- QMotifStyle Class
- qmotifstyle.h Include File
- QMotifStyle Member List
- QMouseEvent Class
- QMouseEvent Member List
- QMoveEvent Class
- QMoveEvent Member List
- QMovie Class
- qmovie.h Include File
- QMovie Member List
- QMultiLineEdit Class
- qmultilineedit.h Include File
- QMultiLineEdit Member List
- QMutex类
- qmutex.h包含文件
- QMutex成员列表
- qnamespace.h Include File
- qnetwork.h Example File
- QNetworkOperation Class
- QNetworkOperation Member List
- QNetworkProtocol Class
- qnetworkprotocol.h Include File
- QNetworkProtocol Member List
- qnp.h Include File
- QNPInstance Class
- QNPInstance Member List
- QNPlugin Class
- QNPlugin Member List
- QNPStream Class
- QNPStream Member List
- QNPWidget Class
- QNPWidget Member List
- QObject类
- QObjectCleanupHandler Class
- qobjectcleanuphandler.h Include File
- QObjectCleanupHandler Member List
- qobject.h包含文件
- QObjectList类
- qobjectlist.h包含文件
- QObjectListIt类
- QObjectListIt成员列表
- QObjectList成员列表
- QObject成员列表
- QPaintDevice类
- qpaintdevice.h包含文件
- QPaintDevice成员列表
- QPaintDeviceMetrics Class
- qpaintdevicemetrics.h Include File
- QPaintDeviceMetrics Member List
- QPainter类
- qpainter.h包含文件
- QPainter成员列表
- QPaintEvent Class
- QPaintEvent Member List
- QPair Class
- qpair.h Include File
- QPair Member List
- QPalette Class
- qpalette.h Include File
- QPalette Member List
- QPen Class
- qpen.h Include File
- QPen Member List
- QPicture Class
- qpicture.h Include File
- QPicture Member List
- QPixmap Class
- QPixmapCache Class
- qpixmapcache.h Include File
- QPixmapCache Member List
- qpixmap.h Include File
- QPixmap Member List
- QPlatinumStyle Class
- qplatinumstyle.h Include File
- QPlatinumStyle Member List
- QPNGImagePacker Class
- QPNGImagePacker Member List
- qpngio.h Include File
- QPoint类
- QPointArray Class
- qpointarray.h Include File
- QPointArray Member List
- qpoint.h包含文件
- QPoint成员列表
- QPopupMenu Class
- qpopupmenu.h Include File
- QPopupMenu Member List
- QPrinter Class
- qprinter.h Include File
- QPrinter Member List
- QProcess Class
- QProcess Examples
- qprocess.h Include File
- QProcess Member List
- QProgressBar Class
- qprogressbar.h Include File
- QProgressBar Member List
- QProgressDialog类
- qprogressdialog.h包含文件
- QProgressDialog成员列表
- QPtrCollection类
- qptrcollection.h包含文件
- QPtrCollection成员列表
- QPtrDict Class
- qptrdict.h Include File
- QPtrDictIterator Class
- QPtrDictIterator Member List
- QPtrDict Member List
- QPtrList类
- qptrlist.h包含文件
- QPtrListIterator类
- QPtrListIterator成员列表
- QPtrList成员列表
- QPtrQueue类
- qptrqueue.h包含文件
- QPtrQueue成员列表
- QPtrStack类
- qptrstack.h包含文件
- QPtrStack成员列表
- QPtrVector类
- qptrvector.h包含文件
- QPtrVector成员列表
- QPushButton类
- qpushbutton.h包含文件
- QPushButton成员列表
- QRadioButton Class
- qradiobutton.h Include File
- QRadioButton Member List
- QRangeControl类
- qrangecontrol.h包含文件
- QRangeControld成员列表
- QRect类
- qrect.h包含文件
- QRect成员列表
- QRegExp Class
- qregexp.h Include File
- QRegExp Member List
- QRegExpValidator Class
- QRegExpValidator Member List
- QRegion Class
- qregion.h Include File
- QRegion Member List
- QResizeEvent Class
- QResizeEvent Member List
- qrtlcodec.h Include File
- QScreen Class
- QScreen Member List
- QScrollBar类
- qscrollbar.h包含文件
- QScrollBar成员列表
- QScrollView类
- qscrollview.h包含文件
- QScrollView成员列表
- QSemaphore类
- qsemaphore.h包含文件
- QSemaphore成员列表
- QServerSocket Class
- qserversocket.h Include File
- QServerSocket Member List
- QSessionManager Class
- qsessionmanager.h Include File
- QSessionManager Member List
- QSettings Class
- qsettings.h Include File
- QSettings Member List
- QSGIStyle Class
- qsgistyle.h Include File
- QSGIStyle Member List
- QShowEvent Class
- QShowEvent Member List
- QSignal Class
- qsignal.h Include File
- QSignalMapper Class
- qsignalmapper.h Include File
- QSignalMapper Member List
- QSignal Member List
- QSimpleRichText Class
- qsimplerichtext.h Include File
- QSimpleRichText Member List
- QSize类
- QSizeGrip Class
- qsizegrip.h Include File
- QSizeGrip Member List
- qsize.h包含文件
- QSize成员列表
- QSizePolicy Class
- qsizepolicy.h Include File
- QSizePolicy Member List
- QSjisCodec Class
- qsjiscodec.h Include File
- QSjisCodec Member List
- QSlider Class
- qslider.h Include File
- QSlider Member List
- QSocket类
- QSocketDevice Class
- qsocketdevice.h Include File
- QSocketDevice Member List
- qsocket.h包含文件
- QSocket成员列表
- QSocketNotifier Class
- qsocketnotifier.h Include File
- QSocketNotifier Member List
- QSortedList Class
- qsortedlist.h Include File
- QSortedList Member List
- QSound类
- qsound.h包含文件
- QSound成员列表
- QSpacerItem Class
- QSpacerItem Member List
- QSpinBox Class
- qspinbox.h Include File
- QSpinBox Member List
- QSplitter Class
- qsplitter.h Include File
- QSplitter Member List
- QSql类
- QSqlCursor Class
- qsqlcursor.h Include File
- QSqlCursor Member List
- QSqlDatabase Class
- qsqldatabase.h Include File
- QSqlDatabase Member List
- QSqlDriver Class
- qsqldriver.h Include File
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- QSqlDriverPlugin Class
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QScrollBar类
QScrollBar窗口部件提供了水平的或垂直的滚动条。 详情请见……
#include <qscrollbar.h>
继承了QWidget和QRangeControl。
所有成员函数的列表。
公有成员
- QScrollBar ( QWidget*parent, constchar*name = 0 )
- QScrollBar ( Orientationorientation, QWidget*parent, constchar*name = 0 )
- QScrollBar ( intminValue, intmaxValue, intlineStep, intpageStep, intvalue, Orientationorientation, QWidget*parent, constchar*name = 0 )
- virtual void setOrientation ( Orientation )
- Orientation orientation () const
- virtual void setTracking ( boolenable )
- bool tracking () const
- bool draggingSlider () const
- virtual void setPalette ( constQPalette&p )
- int minValue () const
- int maxValue () const
- void setMinValue ( int )
- void setMaxValue ( int )
- int lineStep () const
- int pageStep () const
- void setLineStep ( int )
- void setPageStep ( int )
- int value () const
- int sliderStart () const
- QRect sliderRect () const
公有槽
- void setValue ( int )
信号
- void valueChanged ( intvalue )
- void sliderPressed ()
- void sliderMoved ( intvalue )
- void sliderReleased ()
- void nextLine ()
- void prevLine ()
- void nextPage ()
- void prevPage ()
属性
- bool draggingSlider- 用户是否已经在滑块上点击鼠标并且正在移动它(只读)
- int lineStep- 当前线步
- int maxValue- 滚动条的当前最大值
- int minValue- 滚动条的当前最小值
- Orientation orientation- 滚动条的方位
- int pageStep- 当前页步
- bool tracking- 滚动条跟踪是否生效
- int value- 滚动条的当前值
保护成员
- virtual void hideEvent ( QHideEvent * )
详细描述
QScrollBar窗口部件提供了水平的或垂直的滚动条。
滚动条允许用户控制一个程序可定义范围内的值并且给用户一个范围控制的当前值得可视化表示。
滚动条包含四个分别的控制:
- line-up和line-down控制是用户可以用来向上或向下移动线步的小按钮。“线”的意思是可以配置的。在编辑器和列表框中,它是指一行文本,在一个图片查看器中它也许是指20个像素。
- slider是表示滚动条的当前值的把手,用户可以拖动它来改变值。滚动条的这部分有时被称作“拇指”。
- page-up/page-down控制是滑块滑行的区域(滚动条的背景)。点击这里让滚动条向点击的方向移动。“页”的意思也是可以配置的:在编辑器和列表框中,它是指和这个窗口部件空间相同的行数。
QScrollBar只有几个自己的函数,它多数依赖于QRangeControl。最有用的函数是setValue()直接设置滚动条的值,addPage()、addLine()、subtractPage()和subtractLine()模拟点击的效果(对于快捷键很有用),setSteps()定义pageStep()和lineStep()的值,并且setRange()设置滚动条的minValue()和maxValue()。QScrollBar有一个方便的可以设置这些属性的构造函数。
一些图形用户界面风格(例如,提供的Windows和Motif风格)也使用pageStep()的值来计算滑块的大小。
除了来自QRangeControl的访问函数之外,QScrollBar还有完整的一套信号:
- valueChanged() - 当滚动条的值已经发生改变时,被发射。 tracking()决定在用户操作期间,这个信号是否被发射。
- sliderPressed() - 当用户开始拖动滑块时,被发射。
- sliderMoved() - 当用户拖动滑块时,被发射。
- sliderReleased() - 当用户释放滑块时,被发射。
- nextLine() - 当滚动条已经向下或向右移动了一个线步时,被发射。线步在QRangeControl中被定义。
- prevLine() - 当滚动条已经向上或向左移动了一个线步时,被发射。
- nextPage() - 当滚动条已经向下或向右移动了一个页步时,被发射。
- prevPage() - 当滚动条已经向上或向左移动了一个页步时,被发射。
QScrollBar只提供整数范围。注意尽管QScrollBar可以处理很大的数字,当前屏幕上的滚动条不能有效地控制超过100000像素的范围。除此以外,它使用户使用键盘或者鼠标来控制这个滚动条都很困难。
滚动条可以被键盘控制,但是它的默认focusPolicy()是NoFocus。使用setFocusPolicy()来让键盘焦点生效。对于绑定键的列表,请参考keyPressEvent()。
如果你需要在一个界面上添加滚动条,请考虑使用QScrollView类,它封装了滚动条的常用方法。
也可以参考QSlider、QSpinBox、QScrollView、GUI Design Handbook: Scroll Bar和基本窗口部件。
成员函数文档
QScrollBar::QScrollBar ( QWidget*parent, constchar*name = 0 )
构造一个垂直的滚动条。parent和name参数被发送给QWidget的构造函数。
QScrollBar::QScrollBar ( Orientationorientation, QWidget*parent, constchar*name = 0 )
构造一个滚动条。orientation必须是Qt::Vertical或Qt::Horizontal。
parent和name参数被发送给QWidget的构造函数。
QScrollBar::QScrollBar ( intminValue, intmaxValue, intlineStep, intpageStep, intvalue, Orientationorientation, QWidget*parent, constchar*name = 0 )
构造一个滚动条,它的值不能小于minValue或者大于maxValue,线步大小为lineStep并且页步大小为pageStep,它的值被初始化为value(它被使用bound()保证在范围之内)。如果orientation是Vertical,滚动条是垂直的并且如果它是Horizontal,则滚动条是水平的。
parent和name参数被发送给QWidget的构造函数。
bool QScrollBar::draggingSlider () const
如果用户已经在滑块上点击鼠标并且现在正在拖动它,返回真,否则返回假。详细情况请参考“draggingSlider”属性。
void QScrollBar::hideEvent ( QHideEvent* ) [虚 保护]
当滚动条被隐藏时,这个函数被调用。从QWidget中重新实现的。
int QScrollBar::lineStep () const
返回当前线步。详细情况请参考“lineStep”属性。
int QScrollBar::maxValue () const
返回滚动条的当前最大值。详细情况请参考“maxValue”属性。
int QScrollBar::minValue () const
返回滚动条的当前最小值。详细情况请参考“minValue”>属性。
void QScrollBar::nextLine () [信号]
当滚动条向下或向右滚动一个线步时,这个信号被发射。void QScrollBar::nextPage () [信号]
当滚动条向下或向右滚动一个页步时,这个信号被发射。Orientation QScrollBar::orientation () const
返回滚动条的方向。详细情况请参考“orientation”属性。
int QScrollBar::pageStep () const
返回当前页步。详细情况请参考“pageStep”属性。
void QScrollBar::prevLine () [信号]
当滚动条向上或向左滚动一个线步时,这个信号被发射。void QScrollBar::prevPage () [信号]
当滚动条向上或向左滚动一个页步时,这个信号被发射。void QScrollBar::setLineStep ( int )
设置当前线步。详细情况请参考“lineStep”属性。
void QScrollBar::setMaxValue ( int )
设置滚动条的当前最大值。详细情况请参考“maxValue”属性。
void QScrollBar::setMinValue ( int )
设置滚动条的当前最小值。详细情况请参考“minValue”属性。
void QScrollBar::setOrientation ( Orientation ) [虚]
设置滚动条的方位。详细情况请参考“orientation”属性。
void QScrollBar::setPageStep ( int )
设置当前页步。详细情况请参考“pageStep”属性。
void QScrollBar::setPalette ( constQPalette&p ) [虚]
重新实现了虚函数QWidget::setPalette()。对于使用调色板p的Motif风格的滚动条,设置背景色为中间的颜色。
从QWidget中重新实现的。
void QScrollBar::setTracking ( boolenable ) [虚]
设置滚动条跟踪是否生效为enable。详细情况请参考“tracking”属性。
void QScrollBar::setValue ( int ) [slot]
设置当前滚动条的值。详细情况请参考“value”属性。
void QScrollBar::sliderMoved ( intvalue ) [信号]
当滑块被用户移动时,这个信号被发射,新滚动条的值value作为参数。
即使当跟踪被关闭,这个信号也被发射。
也可以参考tracking、valueChanged()、nextLine()、prevLine()、nextPage()和prevPage()。
void QScrollBar::sliderPressed () [信号]
当用户使用鼠标按下滑块时,这个信号被发射。QRect QScrollBar::sliderRect () const
返回滚动条滑块的范围。也可以参考sliderStart()。
void QScrollBar::sliderReleased () [信号]
当用户使用鼠标释放滑块时,这个信号被发射。int QScrollBar::sliderStart () const
返回滚动条滑块开始的像素位置。这对于垂直滚动条相当于sliderRect().y(),对于水平滚动条相当于sliderRect().x()。
bool QScrollBar::tracking () const
如果滚动条跟踪是生效的,返回真,否则返回假。详细情况请参考“tracking”属性。
int QScrollBar::value () const
返回当前滚动条的值。详细情况请参考“value”属性。
void QScrollBar::valueChanged ( intvalue ) [信号]
当滚动条的值已经改变时,这个信号被发射,新滚动条的值value作为参数。属性文档
bool draggingSlider
这个属性保存的是用户是否已经在滑块上点击鼠标并且正在移动它。
通过draggingSlider()来获得属性值。
int lineStep
这个属性保存的是当前线步。
当设置线步时,如果新的线步与原来的设置不同,虚函数stepChange()将被调用。
也可以参考setSteps()、QRangeControl::pageStep()和setRange()。
通过setLineStep()设置属性值并且通过lineStep()来获得属性值。
int maxValue
这个属性保存的是滚动条的当前最大值。
当设置这个属性时,如果需要,QScrollBar::minValue被调整,这样使范围仍有效。
也可以参考setRange()。
通过setMaxValue()设置属性值并且通过maxValue()来获得属性值。
int minValue
这个属性保存的是滚动条的当前最小值。
当设置这个属性时,如果需要,QScrollBar::maxValue被调整,这样使范围仍有效。
也可以参考setRange()。
通过setMinValue()设置属性值并且通过minValue()来获得属性值。
Orientation orientation
这个属性保存的是滚动条的方位。
这个方位必须是Qt::Vertical(默认)或Qt::Horizontal。
通过setOrientation()设置属性值并且通过orientation()来获得属性值。
int pageStep
这个属性保存的是当前页步。
当设置页步时,如果新的页步与原来的设置不同,虚函数stepChange()将被调用。
也可以参考QRangeControl::setSteps()、lineStep和setRange()。
通过setPageStep()设置属性值并且通过pageStep()来获得属性值。
bool tracking
这个属性保存的是滚动条跟踪是否生效。
如果跟踪生效(默认),当滑块正在被拖动时,滚动条发射valueChanged()信号。如果失效,只有当用户在移动滑块之后释放鼠标按键时,滚动条发射valueChanged()信号。
通过setTracking()设置属性值并且通过tracking()来获得属性值。
int value
这个属性保存的是滚动条的当前值。
通过setValue()设置属性值并且通过value()来获得属性值。
也可以参考QRangeControl::value()和prevValue()。
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