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void | findVisible () |
| Finds NotifyableScrollContentWidget and informs them about their visible region. More...
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virtual void | hideEvent (QHideEvent *event) override |
| Reimplemented from QScrollArea::hideEvent. More...
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virtual void | resizeEvent (QResizeEvent *event) override |
| Reimplemented from QScrollArea::resizeEvent. More...
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virtual void | scrollContentsBy (int dx, int dy) override |
| Reimplemented from QScrollArea::scrollContentsBy. More...
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virtual void | showEvent (QShowEvent *event) override |
| Reimplemented from QScrollArea::showEvent. More...
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bool | event (QEvent *e) |
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bool | eventFilter (QObject *o, QEvent *e) |
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virtual QSize | viewportSizeHint () const |
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virtual void | dragEnterEvent (QDragEnterEvent *event) |
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virtual void | dragLeaveEvent (QDragLeaveEvent *event) |
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virtual void | dragMoveEvent (QDragMoveEvent *event) |
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virtual void | dropEvent (QDropEvent *event) |
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bool | event (QEvent *event) |
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virtual void | keyPressEvent (QKeyEvent *e) |
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virtual void | mouseDoubleClickEvent (QMouseEvent *e) |
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virtual void | mouseMoveEvent (QMouseEvent *e) |
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virtual void | mousePressEvent (QMouseEvent *e) |
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virtual void | mouseReleaseEvent (QMouseEvent *e) |
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virtual void | paintEvent (QPaintEvent *event) |
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void | setViewportMargins (const QMargins &margins) |
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void | setViewportMargins (int left, int top, int right, int bottom) |
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virtual bool | viewportEvent (QEvent *event) |
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virtual void | wheelEvent (QWheelEvent *e) |
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virtual void | changeEvent (QEvent *ev) |
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bool | event (QEvent *e) |
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virtual void | actionEvent (QActionEvent *event) |
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virtual void | closeEvent (QCloseEvent *event) |
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void | create (WId window, bool initializeWindow, bool destroyOldWindow) |
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void | destroy (bool destroyWindow, bool destroySubWindows) |
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virtual void | enterEvent (QEvent *event) |
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bool | event (QEvent *event) |
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virtual void | focusInEvent (QFocusEvent *event) |
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bool | focusNextChild () |
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virtual void | focusOutEvent (QFocusEvent *event) |
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bool | focusPreviousChild () |
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void | initPainter (QPainter *painter) const |
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virtual void | inputMethodEvent (QInputMethodEvent *event) |
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virtual void | keyReleaseEvent (QKeyEvent *event) |
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virtual void | leaveEvent (QEvent *event) |
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int | metric (PaintDeviceMetric m) const |
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virtual void | moveEvent (QMoveEvent *event) |
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virtual bool | nativeEvent (const QByteArray &eventType, void *message, long *result) |
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QPaintDevice * | redirected (QPoint *offset) const |
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QPainter * | sharedPainter () const |
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virtual void | tabletEvent (QTabletEvent *event) |
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void | updateMicroFocus () |
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Qt::Alignment | alignment () const |
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void | ensureVisible (int x, int y, int xmargin, int ymargin) |
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void | ensureWidgetVisible (QWidget *childWidget, int xmargin, int ymargin) |
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virtual bool | focusNextPrevChild (bool next) |
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| QScrollArea (QWidget *parent) |
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void | setAlignment (Qt::Alignment) |
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void | setWidget (QWidget *widget) |
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void | setWidgetResizable (bool resizable) |
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virtual QSize | sizeHint () const |
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QWidget * | takeWidget () |
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QWidget * | widget () const |
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bool | widgetResizable () const |
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void | addScrollBarWidget (QWidget *widget, Qt::Alignment alignment) |
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QWidget * | cornerWidget () const |
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QScrollBar * | horizontalScrollBar () const |
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Qt::ScrollBarPolicy | horizontalScrollBarPolicy () const |
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QSize | maximumViewportSize () const |
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virtual QSize | minimumSizeHint () const |
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| QAbstractScrollArea (QWidget *parent) |
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QWidgetList | scrollBarWidgets (Qt::Alignment alignment) |
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void | setCornerWidget (QWidget *widget) |
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void | setHorizontalScrollBar (QScrollBar *scrollBar) |
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void | setHorizontalScrollBarPolicy (Qt::ScrollBarPolicy) |
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void | setSizeAdjustPolicy (SizeAdjustPolicy policy) |
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virtual void | setupViewport (QWidget *viewport) |
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void | setVerticalScrollBar (QScrollBar *scrollBar) |
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void | setVerticalScrollBarPolicy (Qt::ScrollBarPolicy) |
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void | setViewport (QWidget *widget) |
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SizeAdjustPolicy | sizeAdjustPolicy () const |
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QScrollBar * | verticalScrollBar () const |
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Qt::ScrollBarPolicy | verticalScrollBarPolicy () const |
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QWidget * | viewport () const |
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QRect | frameRect () const |
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Shadow | frameShadow () const |
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Shape | frameShape () const |
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int | frameStyle () const |
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int | frameWidth () const |
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int | lineWidth () const |
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int | midLineWidth () const |
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| QFrame (QWidget *parent, Qt::WindowFlags f) |
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void | setFrameRect (const QRect &) |
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void | setFrameShadow (Shadow) |
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void | setFrameShape (Shape) |
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void | setFrameStyle (int style) |
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void | setLineWidth (int) |
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void | setMidLineWidth (int) |
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bool | acceptDrops () const |
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QString | accessibleDescription () const |
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QString | accessibleName () const |
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QList< QAction * > | actions () const |
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void | activateWindow () |
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void | addAction (QAction *action) |
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void | addActions (QList< QAction * > actions) |
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void | adjustSize () |
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bool | autoFillBackground () const |
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QPalette::ColorRole | backgroundRole () const |
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QBackingStore * | backingStore () const |
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QSize | baseSize () const |
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QWidget * | childAt (int x, int y) const |
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QWidget * | childAt (const QPoint &p) const |
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QRect | childrenRect () const |
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QRegion | childrenRegion () const |
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void | clearFocus () |
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void | clearMask () |
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bool | close () |
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QMargins | contentsMargins () const |
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QRect | contentsRect () const |
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QCursor | cursor () const |
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WId | effectiveWinId () const |
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void | ensurePolished () const |
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Qt::FocusPolicy | focusPolicy () const |
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QWidget * | focusProxy () const |
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QWidget * | focusWidget () const |
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const QFont & | font () const |
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QFontInfo | fontInfo () const |
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QFontMetrics | fontMetrics () const |
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QPalette::ColorRole | foregroundRole () const |
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QRect | frameGeometry () const |
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QSize | frameSize () const |
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const QRect & | geometry () const |
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void | getContentsMargins (int *left, int *top, int *right, int *bottom) const |
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QPixmap | grab (const QRect &rectangle) |
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void | grabGesture (Qt::GestureType gesture, Qt::GestureFlags flags) |
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void | grabKeyboard () |
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void | grabMouse () |
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void | grabMouse (const QCursor &cursor) |
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int | grabShortcut (const QKeySequence &key, Qt::ShortcutContext context) |
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QGraphicsEffect * | graphicsEffect () const |
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QGraphicsProxyWidget * | graphicsProxyWidget () const |
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bool | hasEditFocus () const |
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bool | hasFocus () const |
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virtual bool | hasHeightForWidth () const |
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bool | hasMouseTracking () const |
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int | height () const |
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virtual int | heightForWidth (int w) const |
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void | hide () |
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Qt::InputMethodHints | inputMethodHints () const |
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virtual QVariant | inputMethodQuery (Qt::InputMethodQuery query) const |
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void | insertAction (QAction *before, QAction *action) |
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void | insertActions (QAction *before, QList< QAction * > actions) |
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bool | isActiveWindow () const |
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bool | isAncestorOf (const QWidget *child) const |
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bool | isEnabled () const |
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bool | isEnabledTo (const QWidget *ancestor) const |
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bool | isEnabledToTLW () const |
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bool | isFullScreen () const |
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bool | isHidden () const |
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bool | isMaximized () const |
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bool | isMinimized () const |
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bool | isModal () const |
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bool | isTopLevel () const |
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bool | isVisible () const |
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bool | isVisibleTo (const QWidget *ancestor) const |
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bool | isWindow () const |
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bool | isWindowModified () const |
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QLayout * | layout () const |
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Qt::LayoutDirection | layoutDirection () const |
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QLocale | locale () const |
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void | lower () |
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Qt::HANDLE | macCGHandle () const |
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Qt::HANDLE | macQDHandle () const |
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QPoint | mapFrom (const QWidget *parent, const QPoint &pos) const |
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QPoint | mapFromGlobal (const QPoint &pos) const |
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QPoint | mapFromParent (const QPoint &pos) const |
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QPoint | mapTo (const QWidget *parent, const QPoint &pos) const |
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QPoint | mapToGlobal (const QPoint &pos) const |
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QPoint | mapToParent (const QPoint &pos) const |
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QRegion | mask () const |
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int | maximumHeight () const |
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QSize | maximumSize () const |
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int | maximumWidth () const |
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int | minimumHeight () const |
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QSize | minimumSize () const |
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int | minimumWidth () const |
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void | move (int x, int y) |
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void | move (const QPoint &) |
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QWidget * | nativeParentWidget () const |
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QWidget * | nextInFocusChain () const |
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QRect | normalGeometry () const |
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void | overrideWindowFlags (Qt::WindowFlags flags) |
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QPaintEngine * | paintEngine () const |
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const QPalette & | palette () const |
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QWidget * | parentWidget () const |
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QPoint | pos () const |
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QWidget * | previousInFocusChain () const |
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| QWidget (QWidget *parent, Qt::WindowFlags f) |
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void | raise () |
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QRect | rect () const |
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void | releaseKeyboard () |
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void | releaseMouse () |
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void | releaseShortcut (int id) |
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void | removeAction (QAction *action) |
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void | render (QPaintDevice *target, const QPoint &targetOffset, const QRegion &sourceRegion, QFlags< QWidget::RenderFlag > renderFlags) |
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void | render (QPainter *painter, const QPoint &targetOffset, const QRegion &sourceRegion, QFlags< QWidget::RenderFlag > renderFlags) |
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void | repaint () |
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void | repaint (int x, int y, int w, int h) |
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void | repaint (const QRect &rect) |
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void | repaint (const QRegion &rgn) |
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void | resize (int w, int h) |
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void | resize (const QSize &) |
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bool | restoreGeometry (const QByteArray &geometry) |
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QByteArray | saveGeometry () const |
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void | scroll (int dx, int dy, const QRect &r) |
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void | scroll (int dx, int dy) |
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void | setAcceptDrops (bool on) |
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void | setAccessibleDescription (const QString &description) |
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void | setAccessibleName (const QString &name) |
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void | setAttribute (Qt::WidgetAttribute attribute, bool on) |
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void | setAutoFillBackground (bool enabled) |
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void | setBackgroundRole (QPalette::ColorRole role) |
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void | setBaseSize (int basew, int baseh) |
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void | setBaseSize (const QSize &) |
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void | setContentsMargins (int left, int top, int right, int bottom) |
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void | setContentsMargins (const QMargins &margins) |
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void | setCursor (const QCursor &) |
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void | setDisabled (bool disable) |
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void | setEditFocus (bool enable) |
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void | setEnabled (bool) |
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void | setFixedHeight (int h) |
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void | setFixedSize (const QSize &s) |
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void | setFixedSize (int w, int h) |
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void | setFixedWidth (int w) |
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void | setFocus (Qt::FocusReason reason) |
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void | setFocus () |
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void | setFocusPolicy (Qt::FocusPolicy policy) |
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void | setFocusProxy (QWidget *w) |
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void | setFont (const QFont &) |
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void | setForegroundRole (QPalette::ColorRole role) |
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void | setGeometry (const QRect &) |
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void | setGeometry (int x, int y, int w, int h) |
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void | setGraphicsEffect (QGraphicsEffect *effect) |
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void | setHidden (bool hidden) |
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void | setInputMethodHints (Qt::InputMethodHints hints) |
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void | setLayout (QLayout *layout) |
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void | setLayoutDirection (Qt::LayoutDirection direction) |
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void | setLocale (const QLocale &locale) |
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void | setMask (const QBitmap &bitmap) |
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void | setMask (const QRegion ®ion) |
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void | setMaximumHeight (int maxh) |
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void | setMaximumSize (int maxw, int maxh) |
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void | setMaximumSize (const QSize &) |
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void | setMaximumWidth (int maxw) |
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void | setMinimumHeight (int minh) |
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void | setMinimumSize (const QSize &) |
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void | setMinimumSize (int minw, int minh) |
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void | setMinimumWidth (int minw) |
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void | setMouseTracking (bool enable) |
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void | setPalette (const QPalette &) |
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void | setParent (QWidget *parent) |
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void | setParent (QWidget *parent, Qt::WindowFlags f) |
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void | setShortcutAutoRepeat (int id, bool enable) |
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void | setShortcutEnabled (int id, bool enable) |
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void | setSizeIncrement (const QSize &) |
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void | setSizeIncrement (int w, int h) |
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void | setSizePolicy (QSizePolicy) |
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void | setSizePolicy (QSizePolicy::Policy horizontal, QSizePolicy::Policy vertical) |
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void | setStatusTip (const QString &) |
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void | setStyle (QStyle *style) |
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void | setStyleSheet (const QString &styleSheet) |
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void | setToolTip (const QString &) |
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void | setToolTipDuration (int msec) |
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void | setUpdatesEnabled (bool enable) |
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void | setupUi (QWidget *widget) |
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virtual void | setVisible (bool visible) |
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void | setWhatsThis (const QString &) |
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void | setWindowFilePath (const QString &filePath) |
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void | setWindowFlags (Qt::WindowFlags type) |
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void | setWindowIcon (const QIcon &icon) |
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void | setWindowIconText (const QString &) |
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void | setWindowModality (Qt::WindowModality windowModality) |
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void | setWindowModified (bool) |
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void | setWindowOpacity (qreal level) |
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void | setWindowRole (const QString &role) |
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void | setWindowState (Qt::WindowStates windowState) |
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void | setWindowTitle (const QString &) |
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void | show () |
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void | showFullScreen () |
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void | showMaximized () |
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void | showMinimized () |
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void | showNormal () |
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QSize | size () const |
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QSize | sizeIncrement () const |
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QSizePolicy | sizePolicy () const |
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void | stackUnder (QWidget *w) |
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QString | statusTip () const |
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QStyle * | style () const |
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QString | styleSheet () const |
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bool | testAttribute (Qt::WidgetAttribute attribute) const |
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QString | toolTip () const |
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int | toolTipDuration () const |
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QWidget * | topLevelWidget () const |
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bool | underMouse () const |
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void | ungrabGesture (Qt::GestureType gesture) |
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void | unsetCursor () |
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void | unsetLayoutDirection () |
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void | unsetLocale () |
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void | update () |
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void | update (int x, int y, int w, int h) |
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void | update (const QRect &rect) |
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void | update (const QRegion &rgn) |
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void | updateGeometry () |
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bool | updatesEnabled () const |
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QRegion | visibleRegion () const |
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QString | whatsThis () const |
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int | width () const |
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QWidget * | window () const |
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QString | windowFilePath () const |
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Qt::WindowFlags | windowFlags () const |
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QWindow * | windowHandle () const |
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QIcon | windowIcon () const |
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void | windowIconChanged (const QIcon &icon) |
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QString | windowIconText () const |
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void | windowIconTextChanged (const QString &iconText) |
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Qt::WindowModality | windowModality () const |
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qreal | windowOpacity () const |
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QString | windowRole () const |
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Qt::WindowStates | windowState () const |
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QString | windowTitle () const |
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void | windowTitleChanged (const QString &title) |
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Qt::WindowType | windowType () const |
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WId | winId () const |
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int | x () const |
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const QX11Info & | x11Info () const |
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Qt::HANDLE | x11PictureHandle () const |
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int | y () const |
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QWidget * | createWindowContainer (QWindow *window, QWidget *parent, Qt::WindowFlags flags) |
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QWidget * | find (WId id) |
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QWidget * | keyboardGrabber () |
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QWidget * | mouseGrabber () |
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void | setTabOrder (QWidget *first, QWidget *second) |
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typedef | RenderFlags |
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| alignment |
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| widgetResizable |
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| horizontalScrollBarPolicy |
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| sizeAdjustPolicy |
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| verticalScrollBarPolicy |
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| frameRect |
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| frameShadow |
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| frameShape |
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| frameWidth |
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| lineWidth |
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| midLineWidth |
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| acceptDrops |
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| accessibleDescription |
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| accessibleName |
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| autoFillBackground |
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| baseSize |
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| childrenRect |
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| childrenRegion |
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| cursor |
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| enabled |
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| focus |
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| focusPolicy |
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| font |
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| frameGeometry |
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| frameSize |
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| fullScreen |
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| geometry |
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| height |
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| inputMethodHints |
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| isActiveWindow |
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| layoutDirection |
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| locale |
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| maximized |
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| maximumHeight |
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| maximumSize |
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| maximumWidth |
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| minimized |
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| minimumHeight |
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| minimumSize |
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| minimumSizeHint |
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| minimumWidth |
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| modal |
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| mouseTracking |
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| normalGeometry |
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| palette |
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| pos |
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| rect |
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| size |
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| sizeHint |
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| sizeIncrement |
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| sizePolicy |
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| statusTip |
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| styleSheet |
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| toolTip |
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| toolTipDuration |
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| updatesEnabled |
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| visible |
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| whatsThis |
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| width |
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| windowFilePath |
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| windowFlags |
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| windowIcon |
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| windowIconText |
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| windowModality |
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| windowModified |
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| windowOpacity |
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| windowTitle |
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| x |
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| y |
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Scroll area that informs widgets inside about their visible region.
When the the content is scrolled, resized, shown or hidden, the widget searches for instances of NotifyableScrollContentWidget and informs them about their current visible rectangle by calling NotifyableScrollContentWidget::showingRect(). However it does not informa all children. If the widget() returns an instance of NotifyableScrollContentWidget, only that one will be informed, otherwise all direct children of widget() that derive from NotifyableScrollContentWidget will be informed.
Note: A widget can determine its visible region on its own, but it does not now when it changes. It is also slightly more effective to determine the visible rectangle for all children than let it do every widget.