Method Detail

• setZoom

  void setZoom(double factor)

  Zooms to the given scale factor, without changing the viewport's center.

  Parameters:

  factor - The new scale factor.

• setZoomAndCenter

  void setZoomAndCenter(double factor)

  Zooms to the given scale factor, recentering the viewport at the center of the data space.

  Parameters:

  factor - The new scale factor.

• setZoomAndCenter

  void setZoomAndCenter(double factor,
                        RealCoords center)

  Zooms to the given scale factor, recentering the viewport at the specified data coordinates.

  Parameters:

  factor - The new scale factor.

  center - Absolute coordinates, in data coordinate space.

• setZoomAtPoint

  void setZoomAtPoint(double factor,
                      RealCoords pos)

  Zooms to the given scale factor, such that the specified position in data coordinates remains at the same place in the viewport.

  This is useful for repeatedly zooming at a chosen point in the data.

  Parameters:

  factor - The new scale factor.

  pos - The data coordinates to keep in the same place within the viewport.

• setZoomAtPoint

  void setZoomAtPoint(double factor,
                      IntCoords pos)

  Zooms to the given scale factor, such that the specified position in panel coordinates remains at the same place in the viewport.

  This is useful for repeatedly zooming at a clicked point.

  Parameters:

  factor - The new scale factor.

  pos - The panel coordinates to keep in the same place within the viewport.

• zoomIn

  void zoomIn()

  Zooms in by the default amount, without changing the viewport's center.

• zoomIn

  void zoomIn(RealCoords pos)

  Zooms in by the default amount, such that the specified position in data coordinates remains at the same place in the viewport.

  Parameters:

  pos - The data coordinates to keep in the same place within the viewport.

• zoomIn

  void zoomIn(IntCoords pos)

  Zooms in by the default amount, such that the specified position in panel coordinates remains at the same place in the viewport.

  Parameters:

  pos - The panel coordinates to keep in the same place within the viewport.

• zoomOut

  void zoomOut()

  Zooms out by the default amount, without changing the viewport's center.

• zoomOut

  void zoomOut(RealCoords pos)

  Zooms out by the default amount, such that the specified position in data coordinates remains at the same place in the viewport.

  Parameters:

  pos - The data coordinates to keep in the same place within the viewport.

• zoomOut

  void zoomOut(IntCoords pos)

  Zooms out by the default amount, such that the specified position in panel coordinates remains at the same place in the viewport.

  Parameters:

  pos - The panel coordinates to keep in the same place within the viewport.

• zoomToFit

  void zoomToFit(RealRect viewportBox)

  Zoom the viewport to fit the given bounding box in data coordinates.

  Parameters:

  viewportBox - The viewport bounding box, in data coordinates.

• zoomToFit

  void zoomToFit(IntRect viewportBox)

  Zooms the viewport to fit the given bounding box in panel coordinates.

  Parameters:

  viewportBox - The viewport bounding box, in panel coordinates.

• getZoomFactor

  double getZoomFactor()

  Gets the current zoom level.

• getInitialScale

  double getInitialScale()

  Gets the scale to use when reverting after zooming.

• setInitialScale

  void setInitialScale(double zoomFactor)

  Sets the scale to use when reverting after zooming.

• getBestZoomLevel

  double getBestZoomLevel(double fractionalScale)

  Gets the closest step-wise zoom factor below the given scale.