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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
- QSqlDriver Member List
- QSqlDriverPlugin Class
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QButton类
QButton类是按钮窗口部件的抽象基类,提供了按钮所共有的功能。 详情请见……
#include <qbutton.h>
继承了QWidget。
被QCheckBox、QPushButton、QRadioButton和QToolButton继承。
所有成员函数的列表。
公有成员
- QButton ( QWidget*parent = 0, constchar*name = 0, WFlagsf = 0 )
- ~QButton ()
- QString text () const
- virtual void setText ( const QString & )
- const QPixmap * pixmap () const
- virtual void setPixmap ( const QPixmap & )
- QKeySequence accel () const
- virtual void setAccel ( const QKeySequence & )
- bool isToggleButton () const
- enum ToggleType { SingleShot, Toggle, Tristate }
- ToggleType toggleType () const
- virtual void setDown ( bool )
- bool isDown () const
- bool isOn () const
- enum ToggleState { Off, NoChange, On }
- ToggleState state () const
- bool autoResize () const (obsolete)
- void setAutoResize ( bool ) (obsolete)
- bool autoRepeat () const
- virtual void setAutoRepeat ( bool )
- bool isExclusiveToggle () const
- QButtonGroup * group () const
公有槽
- void animateClick ()
- void toggle ()
信号
- void pressed ()
- void released ()
- void clicked ()
- void toggled ( boolon )
- void stateChanged ( intstate )
属性
- QKeySequence accel- 与按钮有关的快捷键
- bool autoRepeat- 是否能够自动重复
- bool autoResize- 是否能够自动重定义大小(废弃的)
- bool down- 按钮是否被按下
- bool exclusiveToggle- 按钮是否是排它的(只读)
- bool on- 按钮是否被切换(只读)
- QPixmap pixmap- 在按钮上显示的像素映射
- QString text- 在按钮上显示的文本
- bool toggleButton- 按钮是否是一个切换按钮(只读)
- ToggleState toggleState- 按钮是否被切换(只读)
- ToggleType toggleType- 按钮的切换类型(只读)
保护成员
- void setToggleButton ( boolb )
- virtual void setToggleType ( ToggleTypetype )
- void setOn ( boolon )
- virtual void setState ( ToggleStates )
- virtual bool hitButton ( constQPoint&pos ) const
- virtual void drawButton ( QPainter * )
- virtual void drawButtonLabel ( QPainter * )
- virtual void paintEvent ( QPaintEvent * )
详细描述
QButton类是按钮窗口部件的抽象基类,提供了按钮所共有的功能。
如果你想创建一个按钮,请使用QPushButton。
QButton类实现了一个抽象按钮,并且让它的子类来指定如何回复用户的行为和如何画按钮。
QButton提供了推动和切换按钮。QRadioButton和QCheckBox类只提供了切换按钮,QPushButton和QToolButton提供了切换按钮和推动按钮。
任何按钮都可以有一个文本的或者像素映射的标签。setText()设置按钮为一个文本按钮并且setPixmap()设置它为一个像素映射按钮。文本/像素映射的使用中需要创建当按钮被取消使用时所需的“失效的”外观。
QButton提供了按钮所要用到的绝大多数状态:
- isDown()决定按钮是否被按下。
- isOn()决定按钮是否是开的。只有切换按钮才能被切换为开或关(请看下面)。
- isEnabled()决定按钮是否可以被用户按下。
- setAutoRepeat()决定如果用户按下按钮,按钮是否可以自动回复。
- setToggleButton()决定按钮是否是一个切换按钮。
isDown()和isOn()的不同点如下: 当用户点击一个切换按钮并且把它切换为开,按钮首先被按下并且然后被释放变为开状态。当用户再次点击(切换为关),按钮首先移动到被按下状态,然后变为关状态(isOn()和isDown()都为假)。
默认按钮(在很多对话框中被使用的)由QPushButton::setDefault()和QPushButton::setAutoDefault()提供。
QButton提供五个信号:
- 当鼠标光标在按钮内,鼠标左键被按下时,pressed()被发送。
- 当鼠标左键被释放时,released()被发送。
- 当按钮首先被按下然后又被释放或者快捷键被按下,或者当animateClick()被调用时,clicked()被发送。
- 当切换按钮的状态变化时,toggled(bool)被发送。
- 当一个三态切换按钮的状态变化时,stateChanged(int)被发送。
如果一个文本按钮的文本中有“&”,QButton会创建一个自动快捷键。下面的代码创建一个标签为“Rock & Roll”(c下面有下划线)的推动按钮。这个按钮有一个自动快捷键,Alt+C:
QPushButton *p = new QPushButton( "Ro&ck && Roll", this );
在这个实例中,当用户按下Alt+C时,按钮将会调用animateClick()。
你也可以使用setAccel()函数来设置一个定制的快捷键。这个对于绝大多数像素映射按钮是很有用的,因为它们没有自动快捷键。
QPushButton *p; p->setPixmap( QPixmap("print.png") ); p->setAccel( ALT+Key_F7 );
Qt所提供的所有按钮(QPushButton、QToolButton、QCheckBox和QRadioButton)都能够既显示文本也显示像素映射。
为了继承QButton,你至少不得不重新实现drawButton()(绘制按钮的外形)和drawButtonLabel()(绘制它的文本或像素映射)。通常也被建议重新实现sizeHint(),并且有时也被建议重新实现hitButton()(为了决定一个按钮按下是否在按钮内)。
为了减少闪烁,QButton::paintEvent()设置drawButton()中所要画的一个像素映射。你不用在QButton的子类中重新实现paintEvent(),除非你想接管全部的绘制工作。
也可以参考QButtonGroup和抽象窗口部件类。
成员类型文档
QButton::ToggleState
这个枚举类型定义了一个切换按钮在任何时候的状态。可能的值如下:
- QButton::Off - 按钮在“关”状态
- QButton::NoChange - 按钮在默认/未改变状态
- QButton::On - 按钮在“开”状态
QButton::ToggleType
这个枚举类型定义了按钮对一个鼠标/键盘按下可以做什么响应:
- QButton::SingleShot - 按下按钮导致一个行为,然后按钮返回一个未按下状态。
- QButton::Toggle - 按下按钮,在On和Off状态中切换。
- QButton::Tristate - 按下按钮,在On、Off和NoChange状态中循环。
成员函数文档
QButton::QButton ( QWidget*parent = 0, constchar*name = 0, WFlagsf = 0 )
构造一个父对象为parent并且名称为name,使用窗口部件标记f的标准按钮。如果parent是一个QButtonGroup,这个构造函数将调用QButtonGroup::insert()。
QButton::~QButton ()
销毁这个按钮。QKeySequence QButton::accel () const
返回这个按钮的相关快捷键。详细情况请参考“accel”属性。
void QButton::animateClick () [槽]
执行一个自动点击:按钮被按下并且在一小段时间后被释放。pressed()、released()、clicked()、toggled()和stateChanged()信号在适当的时候被发送。
如果按钮是失效的,这个函数将不做任何事情。
也可以参考accel。
bool QButton::autoRepeat () const
如果autoRepeat生效,返回真,否则返回假。详细情况请参考“autoRepeat”属性。
bool QButton::autoResize () const
如果autoResize生效,返回真,否则返回假。详细情况请参考“autoResize”属性。
void QButton::clicked () [信号]
当按钮被激活时(比如,当鼠标光标在按钮中,按钮首先被按下并且然后被释放),或者当快捷键被按下时,或者animateClick()被调用时,这个信号被发送。如果你调用setDown(),这个信号不被发送。
如果你想把几个按钮连接到同一个槽中,QButtonGroup::clicked()信号可以做这样的工作。
也可以参考pressed()、released()、toggled()、autoRepeat和down。
实例:fonts/simple-qfont-demo/viewer.cpp、listbox/listbox.cpp、network/clientserver/client/client.cpp、network/ftpclient/ftpmainwindow.cpp、richtext/richtext.cpp、t2/main.cpp和t4/main.cpp。
void QButton::drawButton ( QPainter* ) [虚 保护]
绘制按钮。默认实现是不做任何事。这个虚函数是通过子类的重新实现来绘制真正的按钮。这些重新实现被假定同时在同一点调用drawButtonLabel()。
也可以参考drawButtonLabel()和paintEvent()。
void QButton::drawButtonLabel ( QPainter* ) [虚 保护]
绘制按钮文本或者像素映射。这个虚函数是通过子类的重新实现来绘制真正的按钮。它是由drawButton()调用的。
也可以参考drawButton()和paintEvent()。
QButtonGroup* QButton::group () const
返回这个按钮所属的按钮组的指针。如果这个按钮不是任何一个QButtonGroup的成员,这个函数返回0。
也可以参考QButtonGroup。
bool QButton::hitButton ( constQPoint&pos ) const [虚 保护]
如果pos在可以点击的按钮的矩形中,返回真,或者如果在外面返回假。默认情况下,可点击区域是整个窗口部件。尽管子类可以重新实现它。
bool QButton::isDown () const
如果按钮被按下,返回真,否则返回假。详细情况请参考“down”属性。
bool QButton::isExclusiveToggle () const
如果按钮是排它的,返回真,否则返回假。详细情况请参考“exclusiveToggle”属性。
bool QButton::isOn () const
如果按钮被切换,返回真,否则返回假。详细情况请参考“on”属性。
bool QButton::isToggleButton () const
如果按钮是一个切换按钮,返回真,否则返回假。详细情况请参考“toggleButton”属性。
void QButton::paintEvent ( QPaintEvent* ) [虚 保护]
drawButtonLabel(). 处理按钮的绘制事件。小的和有代表性的复杂按钮被使用双缓存绘制来减少闪烁。实际的绘制是在虚函数drawButton()和drawButtonLabel()中完成的。也可以参考drawButton()和drawButtonLabel()。
从QWidget中重新实现的。
constQPixmap* QButton::pixmap () const
返回按钮中所显示的像素映射。详细情况请参考“pixmap”属性。
void QButton::pressed () [信号]
当按钮被按下的时候,这个信号被发送。也可以参考released()和clicked()。
实例:network/httpd/httpd.cpp和popup/popup.cpp。
void QButton::released () [信号]
当按钮被释放的时候,这个信号被发送。也可以参考pressed()、clicked()和toggled()。
void QButton::setAccel ( constQKeySequence& ) [虚]
设置按钮的相关快捷键。详细情况请参考“accel”属性。
void QButton::setAutoRepeat ( bool ) [虚]
设置autoRepeat是否生效。详细情况请参考“autoRepeat”属性。
void QButton::setAutoResize ( bool )
设置autoResize是否生效。详细情况请参考“autoResize”属性。
void QButton::setDown ( bool ) [虚]
设置按钮是否被按下。详细情况请参考“down”属性。
void QButton::setOn ( boolon ) [protected]
当on为真,设置这个按钮的状态为开,否则为关。
也可以参考toggleState。
void QButton::setPixmap ( constQPixmap& ) [虚]
设置按钮上显示的像素映射。详细情况请参考“pixmap”属性。
void QButton::setState ( ToggleStates ) [虚 保护]
设置按钮的状态为s。s可以为Off、NoChange或On。
void QButton::setText ( constQString& ) [虚]
设置按钮上显示的文本。详细情况请参考“text”属性。
void QButton::setToggleButton ( boolb ) [protected]
如果b为真,这个按钮变为一个切换按钮,如果b为假,这个按钮变为一个普通按钮。
也可以参考toggleButton。
void QButton::setToggleType ( ToggleTypetype ) [虚 保护]
设置按钮的切换类型为type。type可以被设置为SingleShot、Toggle和TriState。
ToggleState QButton::state () const
如果按钮是被切换的,返回真,否则返回假。详细情况请参考“toggleState”属性。
void QButton::stateChanged ( intstate ) [信号]
只要切换按钮改变状态,这个信号就被发送。如果按钮是开的,state为2,如果是“未改变”状态,为1,或者如果按钮是关的,为0。这也许是一个用户行为的结果,toggle()槽激活,或者因为setState()或setOn()被调用。
也可以参考clicked()。
QString QButton::text () const
返回按钮上所显示的文本。详细情况请参考“text”属性。
void QButton::toggle () [槽]
切换一个切换按钮的状态。也可以参考on、setOn()、toggled()和toggleButton。
ToggleType QButton::toggleType () const
返回按钮的切换类型。详细情况请参考“toggleType”属性。
void QButton::toggled ( boolon ) [信号]
只要切换按钮改变状态,这个信号就被发送。如果按钮是开的,on为真,或者如果按钮是关的,on为假。这也许是一个用户行为的结果,toggle()槽被激活,或者因为setOn()被调用。
也可以参考clicked()。
实例:listbox/listbox.cpp。
属性文档
QKeySequence accel
这个属性保存的是按钮相关的快捷键。
如果没有快捷键被设置,这个属性为0。如果你设置这个属性为0,那么任何当前的快捷键都被删除。
使用setAccel()来设置这个属性值并且使用accel()来得到这个属性值。
bool autoRepeat
这个属性保存的是autoRepeat是否生效。
如果autoRepeat生效,那么如果按钮是按下的,clicked()信号会被定期发送。这个属性对切换按钮没有效果。autoRepeat默认是关闭的。
使用setAutoRepeat()来设置这个属性值并且使用autoRepeat()来得到这个属性值。
bool autoResize
这个属性保存的是autoResize是否生效。
这个函数是废弃的。它的提供只是为了保证旧代码能够工作。我们强烈建议在新代码中不要使用它。
如果autoResize生效,那么只要内容发生改变,按钮就会重新定义自己的大小。
使用setAutoResize()来设置这个属性值并且使用autoResize()来得到这个属性值。
bool down
这个属性保存的是按钮是否被按下。
如果这个属性为真,按钮就被设置为被按下。如果你设置这个属性为真,信号pressed()和clicked()就不会被发送。这个属性默认为假。
使用setDown()来设置这个属性值并且使用isDown()来得到这个属性值。
bool exclusiveToggle
这个属性保存的是按钮是否是排它的。
如果这个属性为真并且这个按钮在一个QButtonGroup里,这个按钮只有在其它按钮之一被切换为开的时候,它自己才能被切换为关。这个属性默认为假。
使用isExclusiveToggle()来得到这个属性值。
bool on
这个属性保存的是按钮是否被切换。
这个属性只有对于切换按钮才能被设置。
使用isOn()来得到这个属性值。
QPixmap pixmap
这个属性保存的是按钮上显示的像素映射。
如果像素映射是单色的(比如,它是一个QBitmap或者它的深度为1)并且没有掩码,这个属性将设置像素映射为它自己的掩码。这样的目的是为了绘制对于切换按钮是很重要的透明位图。
如果没有像素映射被设置,pixmap()返回0。
使用setPixmap()来设置这个属性值并且使用pixmap()来得到这个属性值。
QString text
这个属性保存的是按钮上显示的文本。
如果按钮没有文本,这个属性将返回一个零字符串。如果文本中有一个“&”,那么一个使用紧随“&”之后的字母的快捷键将被创建。
没有默认文本。
使用setText()来设置这个属性值并且使用text().来得到这个属性值。
bool toggleButton
这个属性保存的是按钮是否是切换按钮。
默认值为假。
使用isToggleButton()来得到这个属性值。
ToggleState toggleState
这个属性保存的是按钮是否被切换。
如果这个属性被改变,那么它不会导致按钮被重新绘制。
使用state()来得到这个属性值。
ToggleType toggleType
这个属性保存的是按钮的切换类型。
默认切换类型是SingleShot。
使用toggleType()来得到这个属性值。
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