/**
* Enables projection mode. If not yet done, installs the projection ruler column in the viewer's
* vertical ruler and installs a painter that indicate the locations of collapsed regions.
*/
protected void doEnableProjection() {
if (fPainter == null) {
fPainter = new ProjectionAnnotationsPainter(fViewer, fAnnotationAccess);
fPainter.addDrawingStrategy(PROJECTION, getDrawingStrategy());
fPainter.addAnnotationType(ProjectionAnnotation.TYPE, PROJECTION);
fPainter.setAnnotationTypeColor(
ProjectionAnnotation.TYPE, fSharedTextColors.getColor(getColor()));
fViewer.addPainter(fPainter);
}
if (fColumn == null) {
fColumn = new ProjectionRulerColumn(9, fAnnotationAccess);
fColumn.addAnnotationType(ProjectionAnnotation.TYPE);
fColumn.setHover(createProjectionAnnotationHover());
fViewer.addVerticalRulerColumn(fColumn);
}
fColumn.setModel(fViewer.getVisualAnnotationModel());
}
/** Removes the projection ruler column and the painter from the projection viewer. */
protected void doDisableProjection() {
if (fPainter != null) {
fViewer.removePainter(fPainter);
fPainter.dispose();
fPainter = null;
}
if (fColumn != null) {
fViewer.removeVerticalRulerColumn(fColumn);
fColumn = null;
}
}
