XYTextAnnotation with highlighted Box

[develop]

I need to show some values on chart. i am using XYTextAnnotation. but i need to draw colored box around it.

see below picture, this is what i am trying to achieve.
any idea how to do this ??



Thanks

[mkivinie]

You could either
- create an XYBoxAnnotation with your desired color and add it so that it matches the coordinates of your XYTextAnnotation.
When you add annotations to the renderer you can define the Layer (BACKGROUND/FOREGROUND) so color box to the background and text to the foreground

- or create your own Annotation implementation that does both the text and color

[david.gilbert]

XYTextAnnotation has been updated in Subversion a little while ago to support this (to be included in the 1.0.13 release):

http://jfreechart.svn.sourceforge.net/v ... otate=1887

[develop]

Thanks a lot. this is exactly i wanted.
One more question. my chart is real time. meaning only last candle updates in real time, and i need to highlight values. for that i was using XYTextAnnotation.
how can i make annotation values dynamic ?
so that it reflect the real time changes and highlight those changes ?

[Garfke]

XYTextAnnotation has been updated in Subversion a little while ago to support this (to be included in the 1.0.13 release):

http://jfreechart.svn.sourceforge.net/v ... otate=1887

I get a very strange exception when a I try to draw an outline :

My code :

Code: Select all

        XYTextAnnotation annotation = new XYTextAnnotation("V",100,10);
        annotation.setOutlineVisible(true);
        annotation.setFont(new Font("SansSerif", Font.BOLD, 12));
        annotation.setPaint(Color.blue);
        plot.addAnnotation(annotation);

The exception :

Code: Select all

Exception in thread "main" java.lang.NoSuchMethodError: org.jfree.chart.annotations.XYTextAnnotation.setOutlineVisible(Z)V

I have no idea what the problem is, anyone?

[TomHart]

One thing you can do is to 1) create an annotation that draws the values need to be displayed 2) Hold a reference to this annotation 3) Make sure you remove this annotaion when a price change is notified 4) Add a new annotation with the latest values. This works for me as I need to do exactly the samething as you do. However, my requirement is to display the price as the user mouse hovers on the chart. This takes care of it.