我有很多图表，每个图表都在不同的 JInternalFrame 中：
但是水平轴应该对齐到同一点（可能是红线）。问题是，标签的空间是由 jFreechart 自动设置的。
所以我试图找到多行刻度标签的解决方案。我找到了这个：
int optionsCount = state.getStatusOptions().toArray().length;
String[] grade = new String[optionsCount + 1];
grade[0] = "";
for (int x = 1; x < optionsCount + 1; x++) {
//grade[x] ="blaa"+x;//state.getStatusOptions().get(x - 1);
//grade[x]="1.line\n2.line\n3.line";
grade[x] = newLineString(state.getStatusOptions().get(x - 1), 5);
}
// grade[1]="1.line\n2.line";
SymbolAxis rangeAxis;
rangeAxis = new SymbolAxis("", grade){
@Override
protected Rectangle2D getLabelEnclosure(Graphics2D g2, RectangleEdge edge) {
Rectangle2D l = super.getLabelEnclosure(g2, edge);
l.setRect(l.getX(),l.getY(),l.getWidth()*0.5,l.getHeight());
return l;
}
@Override
protected AxisState drawTickMarksAndLabels(Graphics2D g2, double cursor, Rectangle2D plotArea, Rectangle2D dataArea, RectangleEdge edge) {
AxisState state = new AxisState(cursor);
if (isAxisLineVisible()) {
drawAxisLine(g2, cursor, dataArea, edge);
}
double ol = getTickMarkOutsideLength();
double il = getTickMarkInsideLength();
List ticks = refreshTicks(g2, state, dataArea, edge);
state.setTicks(ticks);
g2.setFont(getTickLabelFont());
Iterator iterator = ticks.iterator();
// remember the max number of lines used in any label
int maxLinesUsed = 0;
while (iterator.hasNext()) {
ValueTick tick = (ValueTick) iterator.next();
if (isTickLabelsVisible()) {
g2.setPaint(getTickLabelPaint());
float[] anchorPoint = calculateAnchorPoint(tick, cursor, dataArea, edge);
g2.draw(plotArea);
g2.setPaint(Color.green);
g2.draw(dataArea);
g2.setPaint(getTickLabelPaint());
// split by "\n" and draw text in a new line for each result
String tickText = tick.getText();
int line = 1;
for (String tickTextLine : tickText.split("\n")) {
float x = anchorPoint[0];
// one row down...
float y = anchorPoint[1] + line * g2.getFont().getSize();
TextUtilities.drawRotatedString(tickTextLine, g2, x, y, tick.getTextAnchor(), tick.getAngle(), tick
.getRotationAnchor());
line++;
}
// if we used more lines than any time before remember it
if (line > maxLinesUsed) {
maxLinesUsed = line;
}
}
if (isTickMarksVisible() && tick.getTickType().equals(TickType.MAJOR)) {
float xx = (float) valueToJava2D(tick.getValue(), dataArea, edge);
Line2D mark = null;
g2.setStroke(getTickMarkStroke());
g2.setPaint(getTickMarkPaint());
if (edge == RectangleEdge.LEFT) {
mark = new Line2D.Double(cursor - ol, xx, cursor + il, xx);
} else if (edge == RectangleEdge.RIGHT) {
mark = new Line2D.Double(cursor + ol, xx, cursor - il, xx);
} else if (edge == RectangleEdge.TOP) {
mark = new Line2D.Double(xx, cursor - ol, xx, cursor + il);
} else if (edge == RectangleEdge.BOTTOM) {
mark = new Line2D.Double(xx, cursor + ol, xx, cursor - il);
}
g2.draw(mark);
}
}
// need to work out the space used by the tick labels...
// so we can update the cursor...
// patched using maxLinesUsed => we need more space because of multiple lines
double used = 0.0;
if (isTickLabelsVisible()) {
if (edge == RectangleEdge.LEFT) {
used += findMaximumTickLabelWidth(ticks, g2, plotArea, isVerticalTickLabels()) * maxLinesUsed;
state.cursorLeft(used);
} else if (edge == RectangleEdge.RIGHT) {
used = findMaximumTickLabelWidth(ticks, g2, plotArea, isVerticalTickLabels()) * maxLinesUsed;
state.cursorRight(used);
} else if (edge == RectangleEdge.TOP) {
used = findMaximumTickLabelHeight(ticks, g2, plotArea, isVerticalTickLabels()) * maxLinesUsed;
state.cursorUp(used);
} else if (edge == RectangleEdge.BOTTOM) {
used = findMaximumTickLabelHeight(ticks, g2, plotArea, isVerticalTickLabels()) * maxLinesUsed;
state.cursorDown(used);
}
}
return state;
}
};
如上图所示，新行功能有效，但标签间距无效。我试图覆盖 getLabelEnclosure 方法，但它给定的字符串只是“”。
有谁知道我的问题的解决方案。多线或其他方式来对齐图表？
谢谢！