Constrain CollapsibleTimelinePlotExample selected region to not extend past a particular time.

ConstrainTimelineSelectedRegion.java

        final TimeStamp maxTimeStamp = t0.add( Time.fromMinutes( 300 ) );
        final double maxTime = plot.fromTimeStamp( maxTimeStamp );
        
        // add a constraint which prevents the max selection value
        // from moving past the max timeline value
        plot.getTimeAxis( ).addConstraint( new Constraint( )
        {
            @Override
            public String getName( )
            {
                return "CurrentTimeLocked";
            }
            
            Double previousMin = null;

            @Override
            public void applyConstraint( TaggedAxis1D axis )
            {
                Tag minTag = plot.getTimeSelectionMinTag( );
                Tag maxTag = plot.getTimeSelectionMaxTag( );
                TimeStamp max = plot.getTimeSelectionMax( );
                
                if ( max.isAfter( maxTimeStamp ) )
                {
                    // reset min tag value
                    if ( previousMin != null ) minTag.setValue( previousMin );
                    
                    // cap max tag value
                    maxTag.setValue( maxTime );
                }
                
                // remember last min tag value
                previousMin = minTag.getValue( );
            }
        });
        
        // add a painter to draw the red region
        plot.getOverlayLayout( ).addPainter( new GlimpseDataPainter1D( )
        {
            @Override
            public void paintTo( GL gl, GlimpseBounds bounds, Axis1D axis )
            {
                int height = bounds.getHeight( );
                
                
                GlimpseColor.glColor( gl, GlimpseColor.getRed( 0.4f ) );
                
                double axisMax = axis.getMax( );
                
                gl.glBegin( GL.GL_QUADS );
                try
                {
                    gl.glVertex2d( maxTime, 0 );
                    gl.glVertex2d( maxTime, height );
                    gl.glVertex2d( axisMax, height );
                    gl.glVertex2d( axisMax, 0 );
                }
                finally
                {
                    gl.glEnd( );
                }
            }   
        });