In the following example, I first try to layout the text of the label by using the getPrefferedSize method, and then I use the resulting width and height to layout the text again in a style tag.
However, with each new layout, the width and height of the label are increasing progressively (just to be sure I set the padding, border and margins to zero).
Does anyone knows a way to overcome this (i.e. setting the width and height in a style tag that results in the same width and height returned from getPrefferedSize) ?
I tried several things, e.g using SwingUtilities.layoutCompoundLabel, or the guidelines presented in JLabel with HTML does not set width properly, but nothing worked as expected.
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
public class Test
{
public static void main (String args[])
{
String text = "TEST <br> TEST2";
JLabel localrenderer = new JLabel("");
String labeltext = String.format("<html><div style=\"padding:0px;margin:0px;border:0px;\">%s</div><html>", text);
localrenderer.setText(labeltext);
int width1 = localrenderer.getPreferredSize().width;
int height1 = localrenderer.getPreferredSize().height;
System.out.println("FIRST run: "+width1+"-"+height1);
labeltext = String.format("<html><div style=\"padding:0px;margin:0px;border:0px;height:%dpx;width:%dpx\">%s</div><html>", height1, width1, text);
JLabel localrenderer2 = new JLabel(labeltext);
width1 = localrenderer2.getPreferredSize().width;
height1 = localrenderer2.getPreferredSize().height;
System.out.println("SECOND run: "+width1+"-"+height1);
labeltext = String.format("<html><div style=\"padding:0px;margin:0px;border:0px;height:%dpx;width:%dpx\">%s</div><html>", height1, width1, text);
JLabel localrenderer3 = new JLabel(labeltext);
width1 = localrenderer3.getPreferredSize().width;
height1 = localrenderer3.getPreferredSize().height;
System.out.println("THIRD run: "+width1+"-"+height1);
JFrame testframe = new JFrame();
JPanel testpanel = new JPanel();
testpanel.add(localrenderer);
testpanel.add(localrenderer2);
testpanel.add(localrenderer3);
testframe.add(testpanel);
testframe.pack();
testframe.setVisible(true);
}
}
EDIT: Now also displaying the labels. Though the display is not a real problem, but setting and getting a property of a JLabel containing HTML.
