class GraphGenerator1 extends JPanel {
ChartPanel chartPanel, sbc;
void generator(int t, int Value1, int Value2) {
if (t == 1) {
DefaultCategoryDataset gData = new DefaultCategoryDataset();
gData.setValue(Value1, "What you saved", "");
gData.setValue(Value2, "What you paid", "");
JFreeChart chart = ChartFactory.createBarChart("", "", "", gData,
PlotOrientation.VERTICAL, false, false, false);
chart.setBackgroundPaint(Color.WHITE);
BarRenderer br = (BarRenderer) chart.getCategoryPlot()
.getRenderer();
br.setBarPainter(new StandardBarPainter());
br.setSeriesPaint(0, Color.decode("#97d95c"));
br.setSeriesPaint(1, Color.decode("#437346"));
chart.getCategoryPlot().setBackgroundPaint(new Color(0, 0, 0, 0));
br.setMaximumBarWidth(0.25);
chart.getCategoryPlot().setDomainGridlinesVisible(false);
chart.getCategoryPlot().setRangeGridlinesVisible(false);
chart.getCategoryPlot().getDomainAxis().setTickLabelsVisible(false);
// chart.getCategoryPlot().clearDomainMarkers();
chart.getCategoryPlot().getRangeAxis().setAxisLineVisible(false);
chart.getCategoryPlot().getRangeAxis().setTickMarksVisible(false);
chartPanel = new ChartPanel(chart);
this.setLayout(new BorderLayout());
this.add(chartPanel, BorderLayout.CENTER);
this.setOpaque(true);
}
}
}
class Window extends JFrame implements MouseListener {
GraphGenerator1 x;
JButton j;
Window() {
x = new GraphGenerator1();
x.generator(1, 56, 20);
j = new JButton("CLICK ME");
this.setLayout(new BorderLayout());
this.add(x, BorderLayout.CENTER);
this.add(j, BorderLayout.SOUTH);
j.addMouseListener(this);
this.setVisible(true);
this.setExtendedState(MAXIMIZED_BOTH);
this.setDefaultCloseOperation(EXIT_ON_CLOSE);
}
public void mouseEntered(MouseEvent e) {
}
public void mouseExited(MouseEvent e) {
}
public void mousePressed(MouseEvent e) {
}
public void mouseReleased(MouseEvent e) {
}
public void mouseClicked(MouseEvent e) {
String a = (String) JOptionPane.showInputDialog(rootPane,
"ENTER FIRST VALUE", "", JOptionPane.PLAIN_MESSAGE);
String b = (String) JOptionPane.showInputDialog(rootPane,
"ENTER SECOND VALUE", "", JOptionPane.PLAIN_MESSAGE);
int aa = Integer.parseInt(a);
int bb = Integer.parseInt(b);
x.generator(1, aa, bb);
x.chartPanel.revalidate();
x.chartPanel.repaint();
// I DONT KNOW IT DOESNT UPDATE//
}
public static void main(String args[]) {
new Window();
}
}
我有一个要更新的条形图,我尝试了 revalidate 和 repaint 方法但没有成功。我什至添加了 chartPanel.addMouseListener(this)。我不知道我哪里出错了或者我应该在哪里添加一些东西。我有意将 mouseListener 添加到 Jbutton,因为在我的原始程序中,我使用 JButton 中的值来调用图形中的更改。
最佳答案
您的方法很管用。更好的解决方案是更新图表的模型 gData
,并让图表自行更新。还有,
不要在
JButton
上使用鼠标监听器;只需处理ActionEvent
。使用 Java 命名约定。
JOptionPane
可以有多个输入字段,如图所示 here .
中南合作:
public class GraphFrame extends JFrame {
GraphFrame() {
final GraphPanel gPanel = new GraphPanel();
gPanel.create();
JButton button = new JButton(new AbstractAction("Update") {
@Override
public void actionPerformed(ActionEvent e) {
String a = JOptionPane.showInputDialog(rootPane,
"ENTER FIRST VALUE", "", JOptionPane.PLAIN_MESSAGE);
String b = JOptionPane.showInputDialog(rootPane,
"ENTER SECOND VALUE", "", JOptionPane.PLAIN_MESSAGE);
int aa = Integer.parseInt(a);
int bb = Integer.parseInt(b);
gPanel.update(aa, bb);
}
});
this.setDefaultCloseOperation(EXIT_ON_CLOSE);
this.add(gPanel, BorderLayout.CENTER);
this.add(button, BorderLayout.SOUTH);
this.pack();
this.setLocationRelativeTo(null);
this.setVisible(true);
}
private static class GraphPanel extends JPanel {
private DefaultCategoryDataset gData = new DefaultCategoryDataset();
void create() {
update(56, 20);
JFreeChart chart = ChartFactory.createBarChart("", "", "", gData,
PlotOrientation.VERTICAL, false, false, false);
ChartPanel chartPanel = new ChartPanel(chart);
this.add(chartPanel);
}
private void update(int value1, int value2) {
gData.clear();
gData.setValue(value1, "What you saved", "");
gData.setValue(value2, "What you paid", "");
}
}
public static void main(String args[]) {
new GraphFrame();
}
}
关于java - 我有一个要更新的条形图,我尝试了 revalidate 和 repaint 方法但没有成功,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/15460355/