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Qt 4.8
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Qt 4.8
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The QHBoxLayout class lines up widgets horizontally. More...
#include <qboxlayout.h>
Public Functions | |
| QHBoxLayout () | |
| Constructs a new horizontal box. More... | |
| QHBoxLayout (QWidget *parent) | |
| Constructs a new top-level horizontal box with parent parent. More... | |
| ~QHBoxLayout () | |
| Destroys this box layout. More... | |
 Public Functions inherited from QBoxLayout | |
| void | addItem (QLayoutItem *) |
| Reimplemented Function More... | |
| void | addLayout (QLayout *layout, int stretch=0) |
| Adds layout to the end of the box, with serial stretch factor stretch. More... | |
| void | addSpacerItem (QSpacerItem *spacerItem) |
| Adds spacerItem to the end of this box layout. More... | |
| void | addSpacing (int size) |
| Adds a non-stretchable space (a QSpacerItem) with size size to the end of this box layout. More... | |
| void | addStretch (int stretch=0) |
| Adds a stretchable space (a QSpacerItem) with zero minimum size and stretch factor stretch to the end of this box layout. More... | |
| void | addStrut (int) |
| Limits the perpendicular dimension of the box (e.g. More... | |
| void | addWidget (QWidget *, int stretch=0, Qt::Alignment alignment=0) |
| Adds widget to the end of this box layout, with a stretch factor of stretch and alignment alignment. More... | |
| int | count () const |
| Reimplemented Function More... | |
| Direction | direction () const |
| Returns the direction of the box. More... | |
| Qt::Orientations | expandingDirections () const |
| Reimplemented Function More... | |
| bool | hasHeightForWidth () const |
| Reimplemented Function More... | |
| int | heightForWidth (int) const |
| Reimplemented Function More... | |
| void | insertLayout (int index, QLayout *layout, int stretch=0) |
| Inserts layout at position index, with stretch factor stretch. More... | |
| void | insertSpacerItem (int index, QSpacerItem *spacerItem) |
| Inserts spacerItem at position index, with zero minimum size and stretch factor. More... | |
| void | insertSpacing (int index, int size) |
| Inserts a non-stretchable space (a QSpacerItem) at position index, with size size. More... | |
| void | insertStretch (int index, int stretch=0) |
| Inserts a stretchable space (a QSpacerItem) at position index, with zero minimum size and stretch factor stretch. More... | |
| void | insertWidget (int index, QWidget *widget, int stretch=0, Qt::Alignment alignment=0) |
| Inserts widget at position index, with stretch factor stretch and alignment alignment. More... | |
| void | invalidate () |
| Resets cached information. More... | |
| QLayoutItem * | itemAt (int) const |
| Reimplemented Function More... | |
| QSize | maximumSize () const |
| Reimplemented Function More... | |
| int | minimumHeightForWidth (int) const |
| Reimplemented Function More... | |
| QSize | minimumSize () const |
| Reimplemented Function More... | |
| QBoxLayout (Direction, QWidget *parent=0) | |
| Constructs a new QBoxLayout with direction dir and parent widget parent. More... | |
| void | setDirection (Direction) |
| Sets the direction of this layout to direction. More... | |
| void | setGeometry (const QRect &) |
| Reimplemented Function More... | |
| void | setSpacing (int spacing) |
| Reimplements QLayout::setSpacing(). More... | |
| void | setStretch (int index, int stretch) |
| Sets the stretch factor at position index. More... | |
| bool | setStretchFactor (QWidget *w, int stretch) |
| Sets the stretch factor for widget to stretch and returns true if widget is found in this layout (not including child layouts); otherwise returns false. More... | |
| bool | setStretchFactor (QLayout *l, int stretch) |
| Sets the stretch factor for the layout layout to stretch and returns true if layout is found in this layout (not including child layouts); otherwise returns false. More... | |
| QSize | sizeHint () const |
| Reimplemented Function More... | |
| int | spacing () const |
| Reimplements QLayout::spacing(). More... | |
| int | stretch (int index) const |
| Returns the stretch factor at position index. More... | |
| QLayoutItem * | takeAt (int) |
| Reimplemented Function More... | |
| ~QBoxLayout () | |
| Destroys this box layout. More... | |
| Public Functions inherited from QLayout | |
| bool | activate () |
| Redoes the layout for parentWidget() if necessary. More... | |
| void | addWidget (QWidget *w) |
| Adds widget w to this layout in a manner specific to the layout. More... | |
| QMargins | contentsMargins () const |
| Returns the margins used around the layout. More... | |
| QRect | contentsRect () const |
| Returns the layout's geometry() rectangle, but taking into account the contents margins. More... | |
| Qt::Orientations | expandingDirections () const |
| Returns whether this layout can make use of more space than sizeHint(). More... | |
| QRect | geometry () const |
| Reimplemented Function More... | |
| void | getContentsMargins (int *left, int *top, int *right, int *bottom) const |
| virtual int | indexOf (QWidget *) const |
| Searches for widget widget in this layout (not including child layouts). More... | |
| void | invalidate () |
| Reimplemented Function More... | |
| bool | isEmpty () const |
| Reimplemented Function More... | |
| bool | isEnabled () const |
| Returns true if the layout is enabled; otherwise returns false. More... | |
| QLayout * | layout () |
| Reimplemented Function More... | |
| int | margin () const |
| QSize | maximumSize () const |
| Returns the maximum size of this layout. More... | |
| QWidget * | menuBar () const |
| Returns the menu bar set for this layout, or 0 if no menu bar is set. More... | |
| QSize | minimumSize () const |
| Returns the minimum size of this layout. More... | |
| QWidget * | parentWidget () const |
| Returns the parent widget of this layout, or 0 if this layout is not installed on any widget. More... | |
| QLayout (QWidget *parent) | |
| Constructs a new top-level QLayout, with parent parent. More... | |
| QLayout () | |
| Constructs a new child QLayout. More... | |
| void | removeItem (QLayoutItem *) |
| Removes the layout item item from the layout. More... | |
| void | removeWidget (QWidget *w) |
| Removes the widget widget from the layout. More... | |
| bool | setAlignment (QWidget *w, Qt::Alignment alignment) |
| Sets the alignment for widget w to alignment and returns true if w is found in this layout (not including child layouts); otherwise returns false. More... | |
| bool | setAlignment (QLayout *l, Qt::Alignment alignment) |
| Sets the alignment for the layout l to alignment and returns true if l is found in this layout (not including child layouts); otherwise returns false. More... | |
| void | setContentsMargins (int left, int top, int right, int bottom) |
| Sets the left, top, right, and bottom margins to use around the layout. More... | |
| void | setContentsMargins (const QMargins &margins) |
| Sets the margins to use around the layout. More... | |
| void | setEnabled (bool) |
| Enables this layout if enable is true, otherwise disables it. More... | |
| void | setMargin (int) |
| void | setMenuBar (QWidget *w) |
| Tells the geometry manager to place the menu bar widget at the top of parentWidget(), outside QWidget::contentsMargins(). More... | |
| void | setSizeConstraint (SizeConstraint) |
| void | setSpacing (int) |
| SizeConstraint | sizeConstraint () const |
| int | spacing () const |
| int | totalHeightForWidth (int w) const |
| Also takes contentsMargins and menu bar into account. More... | |
| QSize | totalMaximumSize () const |
| Also takes contentsMargins and menu bar into account. More... | |
| QSize | totalMinimumSize () const |
| Also takes contentsMargins and menu bar into account. More... | |
| QSize | totalSizeHint () const |
| Also takes contentsMargins and menu bar into account. More... | |
| void | update () |
| Updates the layout for parentWidget(). More... | |
| ~QLayout () | |
| Destroys the layout, deleting all child layouts. More... | |
| Public Functions inherited from QObject | |
| bool | blockSignals (bool b) |
| If block is true, signals emitted by this object are blocked (i.e., emitting a signal will not invoke anything connected to it). More... | |
| const QObjectList & | children () const |
| Returns a list of child objects. More... | |
| bool | connect (const QObject *sender, const char *signal, const char *member, Qt::ConnectionType type=Qt::AutoConnection) const |
| bool | disconnect (const char *signal=0, const QObject *receiver=0, const char *member=0) |
| bool | disconnect (const QObject *receiver, const char *member=0) |
| void | dumpObjectInfo () |
| Dumps information about signal connections, etc. More... | |
| void | dumpObjectTree () |
| Dumps a tree of children to the debug output. More... | |
| QList< QByteArray > | dynamicPropertyNames () const |
| Returns the names of all properties that were dynamically added to the object using setProperty(). More... | |
| virtual bool | event (QEvent *) |
| This virtual function receives events to an object and should return true if the event e was recognized and processed. More... | |
| virtual bool | eventFilter (QObject *, QEvent *) |
| Filters events if this object has been installed as an event filter for the watched object. More... | |
| template<typename T > | |
| T | findChild (const QString &aName=QString()) const |
| Returns the child of this object that can be cast into type T and that is called name, or 0 if there is no such object. More... | |
| template<typename T > | |
| QList< T > | findChildren (const QString &aName=QString()) const |
| Returns all children of this object with the given name that can be cast to type T, or an empty list if there are no such objects. More... | |
| template<typename T > | |
| QList< T > | findChildren (const QRegExp &re) const |
| bool | inherits (const char *classname) const |
| Returns true if this object is an instance of a class that inherits className or a QObject subclass that inherits className; otherwise returns false. More... | |
| void | installEventFilter (QObject *) |
| Installs an event filter filterObj on this object. More... | |
| bool | isWidgetType () const |
| Returns true if the object is a widget; otherwise returns false. More... | |
| void | killTimer (int id) |
| Kills the timer with timer identifier, id. More... | |
| virtual const QMetaObject * | metaObject () const |
| Returns a pointer to the meta-object of this object. More... | |
| void | moveToThread (QThread *thread) |
| Changes the thread affinity for this object and its children. More... | |
| QString | objectName () const |
| QObject * | parent () const |
| Returns a pointer to the parent object. More... | |
| QVariant | property (const char *name) const |
| Returns the value of the object's name property. More... | |
| Q_INVOKABLE | QObject (QObject *parent=0) |
| Constructs an object with parent object parent. More... | |
| void | removeEventFilter (QObject *) |
| Removes an event filter object obj from this object. More... | |
| void | setObjectName (const QString &name) |
| void | setParent (QObject *) |
| Makes the object a child of parent. More... | |
| bool | setProperty (const char *name, const QVariant &value) |
| Sets the value of the object's name property to value. More... | |
| void | setUserData (uint id, QObjectUserData *data) |
| bool | signalsBlocked () const |
| Returns true if signals are blocked; otherwise returns false. More... | |
| int | startTimer (int interval) |
| Starts a timer and returns a timer identifier, or returns zero if it could not start a timer. More... | |
| QThread * | thread () const |
| Returns the thread in which the object lives. More... | |
| QObjectUserData * | userData (uint id) const |
| virtual | ~QObject () |
| Destroys the object, deleting all its child objects. More... | |
| Public Functions inherited from QLayoutItem | |
| Qt::Alignment | alignment () const |
| Returns the alignment of this item. More... | |
| QSizePolicy::ControlTypes | controlTypes () const |
| Returns the control type(s) for the layout item. More... | |
| QLayoutItem (Qt::Alignment alignment=0) | |
| Constructs a layout item with an alignment. More... | |
| void | setAlignment (Qt::Alignment a) |
| Sets the alignment of this item to alignment. More... | |
| virtual QSpacerItem * | spacerItem () |
| If this item is a QSpacerItem, it is returned as a QSpacerItem; otherwise 0 is returned. More... | |
| virtual QWidget * | widget () |
| If this item is a QWidget, it is returned as a QWidget; otherwise 0 is returned. More... | |
| virtual | ~QLayoutItem () |
| Destroys the QLayoutItem. More... | |
Additional Inherited Members | |
| Public Types inherited from QBoxLayout | |
| enum | Direction { LeftToRight, RightToLeft, TopToBottom, BottomToTop, Down = TopToBottom, Up = BottomToTop } |
| This type is used to determine the direction of a box layout. More... | |
| Public Types inherited from QLayout | |
| enum | SizeConstraint { SetDefaultConstraint, SetNoConstraint, SetMinimumSize, SetFixedSize, SetMaximumSize, SetMinAndMaxSize } |
| The possible values are: More... | |
| Public Slots inherited from QObject | |
| void | deleteLater () |
| Schedules this object for deletion. More... | |
| Signals inherited from QObject | |
| void | destroyed (QObject *=0) |
| This signal is emitted immediately before the object obj is destroyed, and can not be blocked. More... | |
| Static Public Functions inherited from QLayout | |
| static QSize | closestAcceptableSize (const QWidget *w, const QSize &s) |
| Returns a size that satisfies all size constraints on widget, including heightForWidth() and that is as close as possible to size. More... | |
| Static Public Functions inherited from QObject | |
| static bool | connect (const QObject *sender, const char *signal, const QObject *receiver, const char *member, Qt::ConnectionType=Qt::AutoConnection) |
| Creates a connection of the given type from the signal in the sender object to the method in the receiver object. More... | |
| static bool | connect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &method, Qt::ConnectionType type=Qt::AutoConnection) |
| static bool | disconnect (const QObject *sender, const char *signal, const QObject *receiver, const char *member) |
| Disconnects signal in object sender from method in object receiver. More... | |
| static bool | disconnect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &member) |
| static uint | registerUserData () |
| static QString | tr (const char *sourceText, const char *comment=0, int n=-1) |
| static QString | trUtf8 (const char *sourceText, const char *comment=0, int n=-1) |
| Static Public Variables inherited from QObject | |
| static const QMetaObject | staticMetaObject |
| This variable stores the meta-object for the class. More... | |
| Protected Functions inherited from QBoxLayout | |
| void | insertItem (int index, QLayoutItem *) |
| Inserts item into this box layout at position index. More... | |
| Protected Functions inherited from QLayout | |
| void | addChildLayout (QLayout *l) |
This function is called from addLayout() or insertLayout() functions in subclasses to add layout l as a sub-layout. More... | |
| void | addChildWidget (QWidget *w) |
This function is called from addWidget() functions in subclasses to add w as a managed widget of a layout. More... | |
| bool | adoptLayout (QLayout *layout) |
| QRect | alignmentRect (const QRect &) const |
| Returns the rectangle that should be covered when the geometry of this layout is set to r, provided that this layout supports setAlignment(). More... | |
| void | childEvent (QChildEvent *e) |
| Reimplemented Function More... | |
| QLayout (QLayoutPrivate &d, QLayout *, QWidget *) | |
| void | widgetEvent (QEvent *) |
| Performs child widget layout when the parent widget is resized. More... | |
| Protected Functions inherited from QObject | |
| virtual void | connectNotify (const char *signal) |
| This virtual function is called when something has been connected to signal in this object. More... | |
| virtual void | customEvent (QEvent *) |
| This event handler can be reimplemented in a subclass to receive custom events. More... | |
| virtual void | disconnectNotify (const char *signal) |
| This virtual function is called when something has been disconnected from signal in this object. More... | |
| QObject (QObjectPrivate &dd, QObject *parent=0) | |
| int | receivers (const char *signal) const |
| Returns the number of receivers connected to the signal. More... | |
| QObject * | sender () const |
| Returns a pointer to the object that sent the signal, if called in a slot activated by a signal; otherwise it returns 0. More... | |
| int | senderSignalIndex () const |
| virtual void | timerEvent (QTimerEvent *) |
| This event handler can be reimplemented in a subclass to receive timer events for the object. More... | |
| Protected Variables inherited from QObject | |
| QScopedPointer< QObjectData > | d_ptr |
| Protected Variables inherited from QLayoutItem | |
| Qt::Alignment | align |
| Static Protected Variables inherited from QObject | |
| static const QMetaObject | staticQtMetaObject |
| Related Functions inherited from QObject | |
| T | qFindChildqFindChildren (const QObject *obj, const QString &name)() |
| QList< T > | qFindChildrenqFindChildren (const QObject *obj, const QString &name)() |
| QList< T > | qFindChildrenqFindChildren (const QObject *obj, const QRegExp ®Exp)() |
| T * | qobject_cast (QObject *object) |
| QObjectList | |
| void * | qt_find_obj_child (QObject *parent, const char *type, const QString &name) |
| Returns a pointer to the object named name that inherits type and with a given parent. More... | |
The QHBoxLayout class lines up widgets horizontally.
This class is used to construct horizontal box layout objects. See QBoxLayout for details.
The simplest use of the class is like this:
First, we create the widgets we want in the layout. Then, we create the QHBoxLayout object and add the widgets into the layout. Finally, we call QWidget::setLayout() to install the QHBoxLayout object onto the widget. At that point, the widgets in the layout are reparented to have window as their parent.
Definition at line 129 of file qboxlayout.h.
| QHBoxLayout::QHBoxLayout | ( | ) |
Constructs a new horizontal box.
You must add it to another layout.
Definition at line 1361 of file qboxlayout.cpp.
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explicit |
Constructs a new top-level horizontal box with parent parent.
Definition at line 1352 of file qboxlayout.cpp.
| QHBoxLayout::~QHBoxLayout | ( | ) |
Destroys this box layout.
The layout's widgets aren't destroyed.
Definition at line 1429 of file qboxlayout.cpp.