In an application, I'm using uneditable JEditorPanes as a sort of a generic UI widget that can display somewhat complex content (HTML will do the trick), wrap text lines and catch mouse clicks. Not sure if JEditorPane is a good choice for this, so feel free to suggest alternatives.
The following sample code works fairly well:
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import javax.swing.JEditorPane;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.ScrollPaneConstants;
public class Main {
private static JPanel createPanel() {
JPanel panel = new JPanel();
panel.setLayout(new GridBagLayout());
for (int i = 0; i < 3; i++) {
JEditorPane editorPane = new JEditorPane();
editorPane.setEditable(false);
editorPane.setContentType("text/html");
String text =
"This is <b>item #" + i + "</b>." +
" It's got text on it that should be wrapped."
;
editorPane.setText(text);
GridBagConstraints constraints = new GridBagConstraints();
constraints.gridx = 0;
constraints.gridy = i;
constraints.fill = GridBagConstraints.HORIZONTAL;
constraints.weightx = 1.0;
constraints.insets.bottom = 5;
panel.add(editorPane, constraints);
}
return panel;
}
public static void main(String[] args) {
JPanel panel = createPanel();
JFrame frame = new JFrame();
frame.setSize(200, 200);
frame.setLocation(200, 200);
// Change this to switch between examples
boolean useScrollPane = false;
if (useScrollPane) {
JScrollPane scrollPane = new JScrollPane();
scrollPane.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
scrollPane.setViewportView(panel);
frame.add(scrollPane);
}
else {
frame.add(panel);
}
frame.setVisible(true);
}
}
and produces the following:
However, I may have a large number of these and could use a vertical scrollbar.
So I put the whole thing in a JScrollPane (change the useScrollPane
variable to true
in the sample code to see this version).
This gives me a vertical scrollbar if I shrink the window height, but the problem is that now the text is no longer wrapped:
So the question is: how can I get both the text wrapping and the vertical scrollbar?
As you can see, I disabled the horizontal scrollbar, but it didn't help much.
PS. I don't have much experience with Swing, so if you see some beginner WTFs in this code, please point them out :)
// JPanel panel = new JPanel();
ScrollablePanel panel = new ScrollablePanel();
panel.setScrollableWidth( ScrollablePanel.ScrollableSizeHint.FIT );
See Scrollable Panel for the class and an explanation on how the class works.