Hi,
I have a Panel with some images (charts generated with jfreechart) and a
datatable. This Panel is in AjaxTabbedPanel and every time it is accessed
data table is evaluated and charts renewed. But only table is updated and
charts stay the same (they are loaded from cache), they are reloaded only by
pressing CTRL-F5. How to make them update automatically?
Code:
***********************Panel with charts and table***********************
public CelkoveEmisiePanel(String id, Collection celkoveEmisie) {
super(id);
add(emisieTable(celkoveEmisie));
JFreeChartImage poplatkyChart = new JFreeChartImage("chart1",
pieChart(createDatasetPoplatky(celkoveEmisie),"Poplatky"), 300, 300);
poplatkyChart.setOutputMarkupId(true);
add(poplatkyChart);
JFreeChartImage mnozstvoChart = new JFreeChartImage("chart2",
pieChart(createDatasetMnozstvo(celkoveEmisie),"Vypúšťané množstvo"), 300,
300);
mnozstvoChart.setOutputMarkupId(true);
add(mnozstvoChart);
}
*******JFreeChartImage from
http://cwiki.apache.org/WICKET/jfreechart-and-wicket-example.html*****
public class JFreeChartImage extends Image {
private int width;
private int height;
public JFreeChartImage(String id, JFreeChart chart, int width, int
height){
super(id, new Model(chart));
this.width = width;
this.height = height;
}
protected Resource getImageResource() {
return new DynamicImageResource(){
protected byte[] getImageData() {
JFreeChart chart = (JFreeChart)getModelObject();
return toImageData(chart.createBufferedImage(width,
height));
}
protected void setHeaders(WebResponse response) {
if (isCacheable()) {
super.setHeaders(response);
} else {
response.setHeader("Pragma", "no-cache");
response.setHeader("Cache-Control", "no-cache");
response.setDateHeader("Expires", 0);
}
}
};
}
}
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