Hi,
I'm trying to add labels to an image generated in the same program.
I need labels both on the left and right sides of a chart/diagram.
The right side is easy just using the Graphics2D.drawstring(.....)
methods.
For the left side, I previously did the same, using an arbitrary
space from the edge of the diagram as my starting X point. That works,
but some of my labels end up closer to the diagram than I'd like (they
are the longer strings, of course).
So I thought I'd try using a TextLayout to determine the actual size
of the string and use that measurement to position the starting X point.
The function that manages the drawing calls several others, passing
them the Graphics2D object. This seems to work fine. My problem is that
I need to change the AffineTransform when I get to the labels to
eliminate some substantial scaling. This works fine when I use the
drawString () methods, but the changes to the Graphics2D transform are
not propigated to the FontRenderContext's AffineTransform, even if I
don't get that transform until after I make the changes. (Running in a
debugger, the return value of FontRenderContext.getTransform() is null.)
The final result is that my left side labels are not appearing at
all. (I think they are being drawn in the UserSpace outside my image.)
Any ideas on how I could fix this?
Thanks,
Tricia Crichton
private void drawLabels(Graphics2D my2d){
if (!DEBUG){ //the results of these and the following set of
println's follow the problematic code.
System.out.println("StChart drawLabels on entry");
System.out.println(my2d.getTransform().toString());
System.out.println(my2d.getFontRenderContext().getTransform().toString());
}
Row row;
TextLayout label;
Font f = my2d.getFont();
float fontSize = f.getSize2D();
//this is where I change the scale factors
double transMatrix[] = new double [6];
my2d.getTransform().getMatrix(transMatrix);
transMatrix[0] = 1; //eliminate scaling
transMatrix[3] = 1;
my2d.setTransform(new AffineTransform(transMatrix));
/* the above line seems to null out the nested transform:
StChart drawLabels on entry
AffineTransform[[44.0, 0.0, 274.75], [0.0, 44.0, 405.1001892089844]]
AffineTransform[[44.0, 0.0, 274.75], [0.0, 44.0, 405.1001892089844]]
StChart drawLabels after reset Transform
AffineTransform[[1.0, 0.0, 274.75], [0.0, 1.0, 405.1001892089844]]
AffineTransform[[1.0, 0.0, 0.0], [0.0, 1.0, 0.0]]*/
//my2d.getTransform().setToScale(1,1);
/* this line doesn't null out the nested transform, but it also
doesn't seem to work at all,
the original Graphics2D transform is unchanged.
StChart drawLabels on entry
AffineTransform[[44.0, 0.0, 274.75], [0.0, 44.0, 405.1001892089844]]
AffineTransform[[44.0, 0.0, 274.75], [0.0, 44.0, 405.1001892089844]]
StChart drawLabels after reset Transform
AffineTransform[[44.0, 0.0, 274.75], [0.0, 44.0, 405.1001892089844]]
AffineTransform[[44.0, 0.0, 274.75], [0.0, 44.0, 405.1001892089844]] */
if (!DEBUG){
System.out.println("StChart drawLabels after reset Transform");
System.out.println(my2d.getTransform().toString());
System.out.println(my2d.getFontRenderContext().getTransform().toString());
}
my2d.setPaint(Color.black);
FontRenderContext frc = my2d.getFontRenderContext();
if (frc == null) System.out.println("noFontRenderContext!!!!!");
for (int r = 0; r < getSize(); r += 5){
row = getRow(r);
if (row != null){
label = new TextLayout(row.getRowInd()
+ " (" + Integer.toString(row.getStCount()) + " sts)",f,frc);
//my2d.drawString(label,
// getRightLabelX(row), getLabelY(row, fontSize));
label.draw(my2d,
getRightLabelX(row), getLabelY(row, fontSize));
//my2d.drawString(Integer.toString(row.getRowInd()), //old
(working) code
// getLeftLabelX(row,label), getLabelY(row, fontSize));
label.draw(my2d, //new (not working) code
getLeftLabelX(row,label), getLabelY(row, fontSize));
}
}//close cycle rows
}//close drawLabels
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