3
我已經堆積了條形圖，我希望能夠選擇堆棧中的單個條形圖。但ChartMouseListener不會將ChartMouseEvent解析爲相應的ChartEntity。這裏的聽衆片段：JFreeChart MouseListener不能解析圖表元素
public void chartMouseClicked(ChartMouseEvent event){
ChartEntity entity = event.getEntity();
if(entity != null && (entity instanceof XYItemEntity)){
XYItemEntity item = (XYItemEntity)entity;
renderer.select(item.getSeriesIndex(), item.getItem());
return;
}
// deselect
renderer.select(-1,-1);
}
的問題是，event.getEntity（）返回null時，我明明點擊的一些酒吧。請注意，並非所有的酒吧都失敗。我進一步走到圖表的右端，更明顯的是座標的移位。下方的快照顯示在點擊外部時選定的欄實際出現的位置。我在SWT組合中使用JFreeChart。任何人都可以證實，這是一個馬車行爲或是否有解決方法？
下面是完整的SSCCE，你運行它，點擊後槓 - 它會顯示小指。然後重新調整窗口大小並嘗試選擇酒吧 - 它會錯過。我認爲這個小姐是新尺寸的功能。
import java.awt.Color;
import java.awt.Paint;
import java.util.Random;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.jfree.chart.ChartMouseEvent;
import org.jfree.chart.ChartMouseListener;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.DateAxis;
import org.jfree.chart.axis.DateTickMarkPosition;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.entity.ChartEntity;
import org.jfree.chart.entity.XYItemEntity;
import org.jfree.chart.event.RendererChangeEvent;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.StackedXYBarRenderer;
import org.jfree.chart.renderer.xy.StandardXYBarPainter;
import org.jfree.data.time.Day;
import org.jfree.data.time.Hour;
import org.jfree.data.time.TimeTableXYDataset;
import org.jfree.data.xy.TableXYDataset;
import org.jfree.experimental.chart.swt.ChartComposite;
public class StackedChartSwt {
private StackedRenderer renderer;
private Color[] colors = new Color[]{
new Color(230,240,255),
new Color(240,255,240),
new Color(255,255,255),
new Color(255,255,240),
new Color(255,240,240),
new Color(240,240,240)
};
public StackedChartSwt(){
Display display = new Display();
final Shell shell = new Shell(display);
shell.setLayout(new FillLayout());
JFreeChart chart = createStackedChart(createStackedDataset());
ChartComposite chartComposite = new ChartComposite(shell, SWT.NONE, chart, false, false, false, false, false);
chartComposite.setLayoutData(new GridData(GridData.FILL_BOTH));
chartComposite.setRangeZoomable(false);
chartComposite.setMenu(null);
chartComposite.addChartMouseListener(new ThisMouseListener());
shell.setSize(800, 600);
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
display.dispose();
}
private JFreeChart createStackedChart(TableXYDataset tablexydataset) {
DateAxis dateaxis = new DateAxis();
dateaxis.setTickMarkPosition(DateTickMarkPosition.MIDDLE);
NumberAxis numberaxis = new NumberAxis("Event counts");
renderer = new StackedRenderer();
XYPlot plot = new XYPlot(tablexydataset, dateaxis, numberaxis, renderer);
plot.setBackgroundPaint(Color.white);
plot.setDomainGridlinePaint(Color.lightGray);
plot.setDomainGridlinesVisible(true);
plot.setRangeGridlinesVisible(true);
plot.setRangeGridlinePaint(Color.lightGray);
JFreeChart chart = new JFreeChart(null, plot);
chart.setBackgroundPaint(Color.white);
chart.setBorderVisible(false);
chart.setBorderPaint(null);
return chart;
}
class StackedRenderer extends StackedXYBarRenderer{
int selectedRow=-1, selectedCol=-1;
public StackedRenderer(){
setDrawBarOutline(true);
setBarPainter(new StandardXYBarPainter());
setShadowVisible(false);
setSeriesPaint(0, Color.blue);
setMargin(0.2);
}
public void select(int row, int col){
selectedRow = row;
selectedCol = col;
notifyListeners(new RendererChangeEvent(this));
}
@Override
public Paint getItemPaint(final int row, final int col){
if(row == selectedRow && col == selectedCol)
return Color.pink;
return colors[row];
}
}
class ThisMouseListener implements ChartMouseListener{
public void chartMouseMoved(ChartMouseEvent event){
}
public void chartMouseClicked(ChartMouseEvent event){
ChartEntity entity = event.getEntity();
if(entity != null && (entity instanceof XYItemEntity)){
XYItemEntity item = (XYItemEntity)entity;
renderer.select(item.getSeriesIndex(), item.getItem());
return;
}
// deselect
renderer.select(-1,-1);
}
}
private TableXYDataset createStackedDataset(){
Random random = new Random(0);
TimeTableXYDataset ds = new TimeTableXYDataset();
Day day = new Day();
for(int i = 0; i < 24; i++){
Hour hour = new Hour(i, day);
ds.add(hour, random.nextInt(20), "A");
ds.add(hour, random.nextInt(20), "B");
ds.add(hour, random.nextInt(20), "C");
ds.add(hour, random.nextInt(20), "D");
ds.add(hour, random.nextInt(20), "E");
ds.add(hour, random.nextInt(20), "F");
}
return ds;
}
public static void main(String[] args){
new StackedChartSwt();
}
}
請提供[sscce]（http://sscce.org/），展示您描述的問題。 – trashgod
@trashgod - 添加sscce，您可以運行它並單擊（重新調整窗口大小以查看問題） – Dima
+1 [sscce]（http://sscce.org/）;以及很好的粉彩。 :-) – trashgod