Styled Text setText have bad perfomance

Question

I have little problem with StyledText . When I use setText() Method and text is long, I must wait few seconds for render that text. Is there any method what can I use to speed up showing this text?

Answer 1

The only optimisation you can implement is putting your setText() in a Job or in a Runnable to not block the UI.

Other than that, it's an API limitation from SWT.

Other suggestions:

File a bug/feature request

Search for a StyledText , although apparently none exist

Rethink your program. Don't you have a backup plan? Is the performance critical?

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@greg-449

 /** * * @author ggrec * */ public class Test { public static void main(final String[] args) { new Test(); } private Test() { final Display display = new Display(); final Shell shell = new Shell(display); shell.setLayout(new GridLayout(1, false)); final Button button = new Button(shell, SWT.PUSH); button.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false)); button.setText("Press me"); final StyledText text = new StyledText(shell, SWT.NONE); text.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true)); button.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(final SelectionEvent e) { Display.getDefault().asyncExec(new Runnable() { @Override public void run() { text.setText("*put very long text here*"); } }); } }); shell.setSize(1000, 1000); shell.open(); while (!shell.isDisposed()) { if ( !display.readAndDispatch() ) display.sleep(); } display.dispose(); } }