Public Member Functions¶

QwtMagnifier (QWidget *)
virtual ~QwtMagnifier ()
Destructor. QWidget * parentWidget ()
const QWidget * parentWidget () const
void setEnabled (bool)
En/disable the magnifier. bool isEnabled () const
void setMouseFactor (double)
Change the mouse factor. double mouseFactor () const
void setMouseButton (Qt::MouseButton, Qt::KeyboardModifiers=Qt::NoModifier)
void getMouseButton (Qt::MouseButton &, Qt::KeyboardModifiers &) const
void setWheelFactor (double)
Change the wheel factor. double wheelFactor () const
void setWheelModifiers (Qt::KeyboardModifiers)
Qt::KeyboardModifiers wheelModifiers () const
void setKeyFactor (double)
Change the key factor. double keyFactor () const
void setZoomInKey (int key, Qt::KeyboardModifiers=Qt::NoModifier)
void getZoomInKey (int &key, Qt::KeyboardModifiers &) const
Retrieve the settings of the zoom in key. void setZoomOutKey (int key, Qt::KeyboardModifiers=Qt::NoModifier)
void getZoomOutKey (int &key, Qt::KeyboardModifiers &) const
Retrieve the settings of the zoom out key. virtual bool eventFilter (QObject *, QEvent *)
Event filter.

Protected Member Functions¶

virtual void rescale (double factor)=0
virtual void widgetMousePressEvent (QMouseEvent *)
virtual void widgetMouseReleaseEvent (QMouseEvent *)
virtual void widgetMouseMoveEvent (QMouseEvent *)
virtual void widgetWheelEvent (QWheelEvent *)
virtual void widgetKeyPressEvent (QKeyEvent *)
virtual void widgetKeyReleaseEvent (QKeyEvent *)

QwtMagnifier::QwtMagnifier (QWidget * parent) [explicit]¶

Constructor

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bool QwtMagnifier::eventFilter (QObject * object, QEvent * event) [virtual]¶

Event filter. When isEnabled() is true, the mouse events of the observed widget are filtered.

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void QwtMagnifier::getMouseButton (Qt::MouseButton & button, Qt::KeyboardModifiers & modifiers) const¶

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void QwtMagnifier::getZoomInKey (int & key, Qt::KeyboardModifiers & modifiers) const¶

Retrieve the settings of the zoom in key.

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void QwtMagnifier::getZoomOutKey (int & key, Qt::KeyboardModifiers & modifiers) const¶

Retrieve the settings of the zoom out key.

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bool QwtMagnifier::isEnabled () const¶

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double QwtMagnifier::keyFactor () const¶

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double QwtMagnifier::mouseFactor () const¶

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QWidget * QwtMagnifier::parentWidget ()¶

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const QWidget * QwtMagnifier::parentWidget () const¶

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virtual void QwtMagnifier::rescale (double factor) [protected], [pure virtual]¶

Rescale the parent widget

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Implemented in QwtPlotMagnifier.

void QwtMagnifier::setEnabled (bool on)¶

En/disable the magnifier. When enabled is true an event filter is installed for the observed widget, otherwise the event filter is removed.

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void QwtMagnifier::setKeyFactor (double factor)¶

Change the key factor. The key factor defines the ratio between the current range on the parent widget and the zoomed range for each key press of the zoom in/out keys. The default value is 0.9.

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void QwtMagnifier::setMouseButton (Qt::MouseButton button, Qt::KeyboardModifiers modifiers = Qt::NoModifier)¶

Assign the mouse button, that is used for zooming in/out. The default value is Qt::RightButton.

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void QwtMagnifier::setMouseFactor (double factor)¶

Change the mouse factor. The mouse factor defines the ratio between the current range on the parent widget and the zoomed range for each vertical mouse movement. The default value is 0.95.

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void QwtMagnifier::setWheelFactor (double factor)¶

Change the wheel factor. The wheel factor defines the ratio between the current range on the parent widget and the zoomed range for each step of the wheel.

Use values > 1 for magnification (i.e. 2.0) and values < 1 for scaling down (i.e. 1/2.0 = 0.5). You can use this feature for inverting the direction of the wheel.

The default value is 0.9.

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void QwtMagnifier::setWheelModifiers (Qt::KeyboardModifiers modifiers)¶

Assign keyboard modifiers for zooming in/out using the wheel. The default modifiers are Qt::NoModifiers.

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void QwtMagnifier::setZoomInKey (int key, Qt::KeyboardModifiers modifiers = Qt::NoModifier)¶

Assign the key, that is used for zooming in. The default combination is Qt::Key_Plus + Qt::NoModifier.

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void QwtMagnifier::setZoomOutKey (int key, Qt::KeyboardModifiers modifiers = Qt::NoModifier)¶

Assign the key, that is used for zooming out. The default combination is Qt::Key_Minus + Qt::NoModifier.

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double QwtMagnifier::wheelFactor () const¶

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Qt::KeyboardModifiers QwtMagnifier::wheelModifiers () const¶

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void QwtMagnifier::widgetKeyPressEvent (QKeyEvent * keyEvent) [protected], [virtual]¶

Handle a key press event for the observed widget.

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void QwtMagnifier::widgetKeyReleaseEvent (QKeyEvent * keyEvent) [protected], [virtual]¶

Handle a key release event for the observed widget.

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void QwtMagnifier::widgetMouseMoveEvent (QMouseEvent * mouseEvent) [protected], [virtual]¶

Handle a mouse move event for the observed widget.

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void QwtMagnifier::widgetMousePressEvent (QMouseEvent * mouseEvent) [protected], [virtual]¶

Handle a mouse press event for the observed widget.

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void QwtMagnifier::widgetMouseReleaseEvent (QMouseEvent * mouseEvent) [protected], [virtual]¶

Handle a mouse release event for the observed widget.

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void QwtMagnifier::widgetWheelEvent (QWheelEvent * wheelEvent) [protected], [virtual]¶

Handle a wheel event for the observed widget.

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