I am creating a new chart using the ChartFactory
chart = ChartFactory.createBarChart
(reportname,xaxis, yaxis, dataset,
PlotOrientation.VERTICAL, true,true, true);
return chart;
and I am storing it in the session. However the DisplayChart.action that is
in the image src is not called the second time on. It seems like a caching
issue.
Leena Borle wrote:
>
> Hi,
> How are you creating new chart object ? For me every time user clicks on
> submit-DrawChart_draw,action will create New chart object (e.g.
> chart=ChartFactory.createBarChart) and store it in the session which
> afterwards is used by DIV(DrawChart_display.action). You need to refresh
> your chart object.
> Leena
>
> On Wed, Aug 6, 2008 at 11:36 AM, dynamicd <[EMAIL PROTECTED]> wrote:
>
>> This is cool.. I tried it out. However once the
>> chart_display.jsp is called the first time through the image tag. it does
>> not call the DisplayChart.action again to refresh the image with a new
>> one
>> when clicked on the DrawChart.action. (I added the println statement in
>> the
>> display method to find out that the div is not refreshing) I have to log
>> out and log in (invalidate session) to get the new chart. I am missing
>> something
>>
>>
>>
>> public String display() throws Exception {
>> System.out.println("I AM IN THE DISPLAY NOW ");
>> Map attributes =
>> ActionContext.getContext().getSession();
>> this.chart = (JFreeChart) attributes.get("CHART");
>>
>> if(chart == null) {
>> return Constants.FORWARD_INVALIDACTION;
>> }
>> return Constants.FORWARD_SUCCESS;
>> }
>>
>>
>> private void setChart(JFreeChart chart){
>> Map attributes = ActionContext.getContext().getSession();
>> attributes.put("CHART", null);
>> this.chart = chart;
>> attributes.put("CHART", this.chart);
>> }
>>
>> public JFreeChart getChart() {
>> return chart;
>> }
>>
>>
>>
>> Leena Borle wrote:
>> >
>> > Hello,
>> > See if this helps you.
>> > I have a form with remote DIV which displays chart after user clicks
>> on
>> > submit.
>> > Trick here is to generate chart object, store it in session and display
>> it
>> > in separate JSP. Remove the form part if you want to display just the
>> > dynamic-DIV using Chart image.
>> >
>> > Form.jsp [
>> > <s:form>
>> > <s:url id="display_chart" value="DrawChart_draw.action"
>> > namespace="/user" />
>> >
>> > <s:submit value="Draw chart" href="%{display_chart}"
>> > theme="ajax" targets="*chart_div*" />
>> > <br />
>> > </s:form>
>> >
>> > <h4>Your Running Chart</h4>
>> > <div id="*chart_div*">
>> > </div> <!-- End display chart -->
>> > </div>
>> >
>> > ]
>> >
>> >
>> > display_chart.jsp [
>> > <body>
>> >
>> > /MyApp/user/DrawChart_display.action
>> > </body>
>> >
>> > ]
>> >
>> >
>> > struts.xml[
>> > <package name="user" extends
>> > ="struts-default,jfreechart-default">
>> > <!-- Separate method to draw and display due to Remote
>> > DIV/Button tag contsraints.
>> > -->
>> > <action name="DrawChart_input" method="input"
>> > class=".xxx.DrawChart">
>> > <result name="input">form.jsp </result>
>> > </action>
>> >
>> > <action name="DrawChart_draw" method="draw"
>> > class="xxx..DrawChart">
>> > <result name="success">/jsp/display_chart.jsp
>> > </result>
>> > </action>
>> > <action name="DrawChart_display" method="display"
>> > class="xxx.DrawChart">
>> > <result name="success" type="chart">
>> > 400
>> > 300
>> > </result>
>> > </action>
>> >
>> > </package>
>> > ]
>> >
>> >
>> > DrawChart.java [
>> > JFreeChart chart;
>> > public String draw() throws Exception {
>> > //chart creation logic.
>> > //generate chart object
>> > chart = ....
>> > session = ....
>> > session.put("CHART", chart);
>> > return success;
>> > }
>> >
>> > /**
>> > * returns chart obejct from the session.
>> > This methos is used by display_chart.jsp
>> > */
>> > public String display() throws Exception {
>> > session = ...get session ...
>> > this.chart = (JFreeChart) session.get("CHART");
>> > if(chart == null) {
>> > addActionError(getText("error.nochart"));
>> > return ERROR;
>> > }
>> > return SUCCESS;
>> > }
>> >
>> > // this method will get called if we specify chart
>> > public JFreeChart getChart() {
>> > return chart;
>> > }
>> >
>> > /**
>> > * <p> input action
>> > */
>> > public String input() throws Exception {
>> > return INPUT;
>> > }
>> >
>> > ]
>> >
>> >
>> >
>> > Leena
>> >
>> >
>>
>> --
>> View this message in context:
>> http://www.nabble.com/Struts-2-And-JFreeChart-tp18740589p18857105.html
>> Sent from the Struts - User mailing list archive at Nabble.com.
>>
>>
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>
>
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