jfreechart

>> add it to your ChartPanel
add the code in ChartPanel class or in the main program?

>>JFreeChart.createBufferedImage() method
this line will print the chart to printer???

>>Change the Dataset used by your Plot
should i clear the current chart first before putting the new dataset?

below is my sample program:

      public popUp1()
      {
            jan = new JButton("January");
            jan.setActionCommand("jan");
            jan.addActionListener(this);
            feb = new JButton("February");
            feb.setActionCommand("feb");
            feb.addActionListener(this);
            add(jan);
            add(feb);
      }

      public void actionPerformed(ActionEvent e)
      {
            if ("jan".equals(e.getActionCommand()))
            {
            System.out.println("jan");
        }
            else if ("feb".equals(e.getActionCommand()))
            {
                  System.out.println("feb");
            }
    }

how can i add in the above button to ChartPanel?

sample demo program from jfreechart:
 public BarChartDemo(String title) {

        super(title);

        CategoryDataset dataset = createDataset();
        JFreeChart chart = createChart(dataset);
        ChartPanel chartPanel = new ChartPanel(chart);
        chartPanel.setPreferredSize(new Dimension(1000, 270));
        setContentPane(chartPanel);

    }

thanks

yes, it can add the button to the chartPanel but now problem is the button is overwrite the chart... how can make the chart to be smaller then my button can put on the bottom part of the chart...

thanks

actually what can i do with BufferedImage ? can i print it and export it to image format?

Can you show me some sample code on createBufferedImage() in jfreechart and how to print and export it?

thanks

if i use another panel then how can i add it to setContentPane???

>> to save a BufferedImage use ImageIO.write() method.
but i don't know how to createBufferedImage ??

where should i write JFreeChart.createBufferedImage()??? so i need to create a variable to assign it to JFreeChart.createBufferedImage()???

thanks

if i use another panel to group the button then how can i add it to setContentPane???

Sorry, i can't get what you mean.

sample program as below:
CategoryDataset dataset = createDataset();
        JFreeChart chart = createChart(dataset);
            myImage = chart.createBufferedImage(1000,270);
        ChartPanel chartPanel = new ChartPanel(chart);
        chartPanel.setPreferredSize(new Dimension(1000, 270));
            jan = new JButton("January");
            jan.setActionCommand("jan");
            jan.addActionListener(this);
            feb = new JButton("February");
            feb.setActionCommand("feb");
            feb.addActionListener(this);
            chartPanel.add(jan);
            chartPanel.add(feb);
        setContentPane(chartPanel);

another problem when i want to save the bufferedimage to a file it prompt me an error:

ImageIO.write(myImage, "png", new FileOuputStream(".png"));

Error:
symbol  : class FileOuputStream
location: class BarChartDemo ImageIO.write(myImage, "png", new FileOuputStream("1321.png"));
                                                       
i already import java.io.FileOutputStream; and import javax.imageio.*;

thanks.
                                                         

ok i get what u mean......

now i'm able to save the file but how can i print it directly to printer?

thanks.

is't i can print the chart like:
ChartPanel chartPanel = new ChartPanel(chart);
chartPanel .createChartPrintJob();

thanks.

for the question number 2:
at first i write:
dataset = createDataset();
JFreeChart chart = createChart(dataset);

 private CategoryDataset createDataset() {
       
        // row keys...
        String series1 = "First";
        String series2 = "Second";
        String series3 = "Third";

        // column keys...
        String category1 = "Category 1";
        String category2 = "Category 2";
        String category3 = "Category 3";
        String category4 = "Category 4";
        String category5 = "Category 5";

        // create the dataset...
        DefaultCategoryDataset dataset = new DefaultCategoryDataset();

        dataset.addValue(1.0, series1, category1);
        dataset.addValue(4.0, series1, category2);
        dataset.addValue(3.0, series1, category3);
        dataset.addValue(5.0, series1, category4);
        dataset.addValue(5.0, series1, category5);

        dataset.addValue(5.0, series2, category1);
        dataset.addValue(7.0, series2, category2);
        dataset.addValue(6.0, series2, category3);
        dataset.addValue(8.0, series2, category4);
        dataset.addValue(4.0, series2, category5);
       
        return dataset;
       
    }


then on the command button actionPerformed:
dataset = createDataset1();
chart = createChart(dataset);

private CategoryDataset createDataset1() {
       
        // row keys...
        String series1 = "First";
        String series2 = "Second";
        String series3 = "Third";

        // column keys...
        String category1 = "Category 1";
        String category2 = "Category 2";
        String category3 = "Category 3";
        String category4 = "Category 4";
        String category5 = "Category 5";

        // create the dataset...
        DefaultCategoryDataset dataset = new DefaultCategoryDataset();

        dataset.addValue(1.0, series1, category1);
        dataset.addValue(4.0, series1, category2);
        dataset.addValue(3.0, series1, category3);
        dataset.addValue(5.0, series1, category4);
        dataset.addValue(5.0, series1, category5);
       
        return dataset;
       
    }


but the graph still no refresh when i click on the command button. why?

thanks

In what condition the chart will be refresh?

thanks

So , how can i display the chart when i change the dataset?

thanks

private JFreeChart chart;
private ChartPanel chartPanel;
private CategoryDataset dataset;
private DefaultCategoryDataset dataset1;

That mean first i should set the dataset:
dataset = createDataset1();
           private CategoryDataset createDataset1() {
       
        String series1 = "First";
        String series2 = "Second";
        String series3 = "Third";

        String category1 = "Category 1";
        String category2 = "Category 2";
        String category3 = "Category 3";
        String category4 = "Category 4";
        String category5 = "Category 5";

       dataset1 = new DefaultCategoryDataset();
        dataset1.addValue(1.0, series1, category1);
        dataset1.addValue(4.0, series1, category2);
        dataset1.addValue(3.0, series1, category3);
        dataset1.addValue(5.0, series1, category4);
        dataset1.addValue(5.0, series1, category5);
       
        return dataset1;      
    }

2nd, create the chart
chart = createChart(dataset);

3rd, change the chart:
chartPanel.setChart(chart);

is't above steps is correct?

if the above steps are correct then the above steps can apply to all the other chart like: line and pie chart?

thanks

that mean the setChart() can be use in any other chart E.g. line and pie chart?

thanks

thanks