StackOverflow2013

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copied!<p>This is the best solution I could come up with. </p> <pre><code>import org.eclipse.swt.SWT; import org.eclipse.swt.custom.SashForm; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Event; import org.eclipse.swt.widgets.Listener; import org.eclipse.swt.widgets.Shell; public class Main { private static int leftWidth, oldWeight; public static void main(String[] args) { Display display = new Display(); final Shell shell = new Shell(display); shell.setText("StackOverflow"); shell.setLayout(new FillLayout()); shell.setSize(600, 400); final SashForm form = new SashForm(shell, SWT.HORIZONTAL); final Button button = new Button(form, SWT.PUSH); button.setText("Left"); button.addListener(SWT.Resize, new Listener() { @Override public void handleEvent(Event arg0) { int[] weights = form.getWeights(); // oldWeights is used to distinguish between a window resize and // a sash move if (oldWeight != weights[0]) { System.out.println("Weights changed!"); oldWeight = weights[0]; leftWidth = (int) Math.round((double) form.getClientArea().width * (double) weights[0] / (double) (weights[0] + weights[1])); } } }); Button buttonR = new Button(form, SWT.PUSH); buttonR.setText("Right"); form.setWeights(new int[] { 200, 800 }); leftWidth = 200; form.addListener(SWT.Resize, new Listener() { @Override public void handleEvent(Event arg0) { int width = form.getClientArea().width; int[] weights = form.getWeights(); double perChange = (double) leftWidth / (double) width; weights[0] = (int) (perChange * 1000.0); weights[1] = 1000 - weights[0]; // oldWeights must be set before form.setWeights oldWeight = weights[0]; form.setWeights(weights); } }); shell.open(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) display.sleep(); } display.dispose(); } </code></pre> <p>The sash jumps around about 1px when the window is resized due to rounding issues, but it seems to do what I want. </p> <p>This is a very hacky solution and I would like to know if there is a better one. It also crashes if you make the window smaller than the left button, but that is easy to fix.</p>

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