我正在尝试制作一个类似于 jfreechart 演示中的表盘的类。但是,如果窗口变得比打印刻度盘所需的小,我希望带有刻度盘的框架可以滚动。我使用滚动窗格实现了这一点,但发生的情况是,由于表盘具有重量级组件,它们打印在视口之外和滚动条上方,而我无法做到这一点。
我为测试此功能而编写的代码是:
编辑:我使代码更小,试图使其成为 SSCCE(这是我第一次发布问题,如果它仍然太大,很抱歉)
编辑 2:我意识到这是我正在使用(并且必须使用)的 jfreechart 发行版中的一个问题,即 1.0.9 。当前版本的 jfreechart 无法重现此错误。
import java.awt.*;
import javax.swing.JPanel;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.dial.*;
import org.jfree.data.general.DefaultValueDataset;
import org.jfree.ui.*;
public class DialDoubleNeedle extends JPanel{
private DefaultValueDataset dataset1;
private DefaultValueDataset dataset2;
private JFreeChart chart;
public DialDoubleNeedle() {
super();
this.dataset1 = new DefaultValueDataset(0.10);
this.dataset2 = new DefaultValueDataset(0.50);
// get data for diagrams
DialPlot plot = new DialPlot();
plot.setView(0.0, 0.0, 1.0, 1.0);
plot.setDataset(0, this.dataset1);
plot.setDataset(1, this.dataset2);
StandardDialFrame dialFrame = new StandardDialFrame();
dialFrame.setBackgroundPaint(Color.lightGray);
dialFrame.setForegroundPaint(Color.darkGray);
plot.setDialFrame(dialFrame);
GradientPaint gp = new GradientPaint(new Point(),
new Color(255, 255, 255), new Point(),
new Color(170, 170, 220));
DialBackground db = new DialBackground(gp);
db.setGradientPaintTransformer(new StandardGradientPaintTransformer(GradientPaintTransformType.VERTICAL));
plot.setBackground(db);
DialTextAnnotation annotation1 = new DialTextAnnotation("m/s");
annotation1.setFont(new Font("Dialog", Font.BOLD, 14));
annotation1.setRadius(0.7);
plot.addLayer(annotation1);
DialValueIndicator dvi = new DialValueIndicator(0);
dvi.setFont(new Font("Dialog", Font.PLAIN, 10));
dvi.setOutlinePaint(Color.darkGray);
dvi.setRadius(0.60);
dvi.setAngle(-103.0);
dvi.setNumberFormat(new java.text.DecimalFormat("0.00"));
plot.addLayer(dvi);
DialValueIndicator dvi2 = new DialValueIndicator(1);
dvi2.setFont(new Font("Dialog", Font.PLAIN, 10));
dvi2.setOutlinePaint(Color.red);
dvi2.setRadius(0.60);
dvi2.setAngle(-77.0);
dvi2.setNumberFormat(new java.text.DecimalFormat("0.00"));
plot.addLayer(dvi2);
StandardDialScale scale = new StandardDialScale(0, 1, -120, -300, 0.1, 5);
scale.setTickRadius(0.88);
scale.setTickLabelOffset(0.15);
scale.setTickLabelFont(new Font("Dialog", Font.PLAIN, 14));
plot.addScale(0, scale);
StandardDialScale scale2 = new StandardDialScale(0, 1, -120, -300, 0.1, 5);
scale2.setTickRadius(0.50);
scale2.setTickLabelOffset(0.15);
scale2.setTickLabelFont(new Font("Dialog", Font.PLAIN, 10));
scale2.setMajorTickPaint(Color.red);
plot.addScale(1, scale2);
plot.mapDatasetToScale(1, 1);
DialPointer needle2 = new DialPointer.Pin(1);
needle2.setRadius(0.55);
plot.addLayer(needle2);
DialPointer needle = new DialPointer.Pointer(0);
plot.addLayer(needle);
DialCap cap = new DialCap();
cap.setRadius(0.10);
plot.setCap(cap);
chart = new JFreeChart(plot);
chart.setTitle("Title");
ChartPanel cp1 = new ChartPanel(chart);
add(cp1);
}
void setTitle(String title){
chart.setTitle(title);
return;
}
public static void main(final String args[]) {
final javax.swing.JFrame test = new javax.swing.JFrame();
test.addWindowListener(new java.awt.event.WindowAdapter() {
@Override
public void windowClosing(final java.awt.event.WindowEvent e) {
System.exit(0);
}
});
final JPanel jpanel1 = new JPanel();
DialDoubleNeedle app1 = new DialDoubleNeedle();
app1.setTitle("Tittle 1");
jpanel1.add(app1);
final javax.swing.JScrollPane scrollPane = new javax.swing.JScrollPane();
scrollPane.setViewportView(jpanel1);
test.getContentPane().add(scrollPane);
test.pack();
test.setVisible(true);
int i;
Number v;
for(i=0; i<1000000000; i++){
if(i==(1000000000-1)){
i=0;
v=app1.dataset1.getValue();
app1.dataset1.setValue(v.doubleValue()+0.01);
}
}
}
}
如果你编译上面的代码,你可以看到它运行时看起来不错,但如果你缩小它,它最终会在滚动条上获得一些表盘部件(重量级部件)。我能做些什么来解决这个问题?