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POJface: custom FieldEditor bad layout
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copied!<p>I'd like to create a custom FieldEditor for a preference page. the aim is to override ScaleFieldEditor to provide a Scale with two labels over it (one to display the min value, the other to display the max).</p> <p>It made one. It is working but the layout is not good when I add a FileFieldeditor to preference page.</p> <p>It's even worst if I add the FileFieldEditor immediately after the custom ScaleFieldEditor: <a href="http://imageshack.us/g/844/customscalelayoutok.png/" rel="nofollow">http://imageshack.us/g/844/customscalelayoutok.png/</a> (Sorry, I cannot add images to this post).</p> <p>I made a Composite which contains the 2 Labels and the Scale. I used a GridLayout:</p> <pre><code>public class ScaleWithLabelFieldEditor extends ScaleFieldEditor { /** * The maximum value label */ private Label maxLabel; /** * The minimum value label */ private Label minLabel; /** * A composite that contains the scale and the min & max values label */ private Composite controls; public ScaleWithLabelFieldEditor(String name, String labelText, Composite parent) { super(name, labelText, parent); } public ScaleWithLabelFieldEditor(String name, String labelText, Composite parent, int min, int max, int increment, int pageIncrement) { super(name, labelText, parent, min, max, increment, pageIncrement); } @Override protected void doFillIntoGrid(Composite parent, int numColumns) { Control labelControl = getLabelControl(parent); GridData gd = new GridData(); labelControl.setLayoutData(gd); controls = getControls(parent, 2); gd = new GridData(GridData.FILL_HORIZONTAL); gd.horizontalSpan = numColumns -1; gd.grabExcessHorizontalSpace = true; controls.setLayoutData(gd); updateControls(); parent.layout(); } /** * Initialize (if not done yet) the controls composite * * @param parent * the parent composite * @return the controls composite that contains the scaler and the min/max * labels */ protected Composite getControls(Composite parent, int numColumns) { if (controls == null) { controls = new Composite(parent, SWT.NONE); GridLayout layout = new GridLayout(numColumns, false); layout.numColumns = numColumns; controls.setLayout(layout); // Initialize the min value label minLabel = getMinLabel(controls); minLabel.setLayoutData(new GridData(SWT.LEFT, SWT.TOP, false, false)); // Initialize the max value label maxLabel = getMaxLabel(controls); maxLabel.setLayoutData(new GridData(SWT.RIGHT, SWT.TOP, false, false)); // Initialize the scale scale = getScale(controls); scale.setLayoutData(new GridData(SWT.FILL, SWT.BOTTOM, true, false, numColumns, 1)); } return controls; } /** * Nothing to do, already handle with controls composite */ @Override protected void adjustForNumColumns(int numColumns) { // Nothing to do, already handle with controls composite } /** * Update the scale and the labels above */ protected void updateControls() { if (controls != null && !controls.isDisposed()) { // Update scale scale.setMinimum(getMinimum()); scale.setMaximum(getMaximum()); scale.setIncrement(getIncrement()); scale.setPageIncrement(getPageIncrement()); // Update labels maxLabel.setText(Integer.toString(getMaximum())); minLabel.setText(Integer.toString(getMinimum())); } } </code></pre> <p>What I should do to make this field layout work? Did I miss something in GridLayout/GridData use?</p>

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