SoScaleGestureEvent Class Reference
Class for scale (pinch) gesture events. More...
#include <Inventor/gestures/events/SoScaleGestureEvent.h>
Public Member Functions | |
| virtual SoType | getTypeId () const |
| SoScaleGestureEvent () | |
| float | getScaleFactor () const |
| float | getDeltaScaleFactor () const |
Static Public Member Functions | |
| static SoType | getClassTypeId () |
Detailed Description
Class for scale (pinch) gesture events.
SoScaleGestureEvent represents a pinch gesture in the Open Inventor event model. Touch events are analyzed by a SoScaleGestureRecognizer. When a scale gesture is recognized, the recognizer generates this event. The gesture begins with a BEGIN state event. DELTA state events are generated until the end of the gesture which generates an END state event. See SoGestureEvent::getGestureState().
Note:
- In order to get touch events for the gesture recognizer(s) to recognize, the application must explicitly register a touch screen device (SoWinTouchScreen, SoQtTouchScreen, etc).
- In order to get gesture events, the application must explicitly register gesture recognizers with the touch screen device's touch manager (SoTouchManager).
SEE ALSO
SoEvent, SoGestureEvent, SoDoubleTapGestureEvent, SoLongTapGestureEvent, SoRotateGestureEvent, SoScaleGestureRecognizer
Constructor & Destructor Documentation
| SoScaleGestureEvent::SoScaleGestureEvent | ( | ) |
Constructor.
Member Function Documentation
| static SoType SoScaleGestureEvent::getClassTypeId | ( | ) | [static] |
Returns the type identifier for this class.
Reimplemented from SoGestureEvent.
| float SoScaleGestureEvent::getDeltaScaleFactor | ( | ) | const |
Gets the ratio between the current fingers distance and the previous distance.
| float SoScaleGestureEvent::getScaleFactor | ( | ) | const |
Gets the ratio between the current fingers distance and the first distance evaluated after the second down event.
| virtual SoType SoScaleGestureEvent::getTypeId | ( | ) | const [virtual] |
Returns the type identifier for this specific instance.
Reimplemented from SoGestureEvent.
The documentation for this class was generated from the following file:
- Inventor/gestures/events/SoScaleGestureEvent.h