1 files changed, 96 insertions, 0 deletions
diff --git a/org.mihalis.opal/src/main/java/org/mihalis/opal/preferenceWindow/widgets/PWSpinner.java b/org.mihalis.opal/src/main/java/org/mihalis/opal/preferenceWindow/widgets/PWSpinner.java
new file mode 100644
index 0000000..7d51987
--- /dev/null
+++ b/org.mihalis.opal/src/main/java/org/mihalis/opal/preferenceWindow/widgets/PWSpinner.java
@@ -0,0 +1,96 @@
+/*******************************************************************************
+ * Copyright (c) 2011 Laurent CARON
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     Laurent CARON (laurent.caron at gmail dot com) - Initial implementation and API
+ *******************************************************************************/
+package org.mihalis.opal.preferenceWindow.widgets;
+
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.layout.GridData;
+import org.eclipse.swt.widgets.Composite;
+import org.eclipse.swt.widgets.Control;
+import org.eclipse.swt.widgets.Event;
+import org.eclipse.swt.widgets.Listener;
+import org.eclipse.swt.widgets.Spinner;
+import org.mihalis.opal.preferenceWindow.PreferenceWindow;
+
+/**
+ * Instances of this class are spinners.
+ */
+public class PWSpinner extends PWWidget {
+	
+	/** The max. */
+	private final int max;
+	
+	/** The min. */
+	private final int min;
+
+	/**
+	 * Constructor.
+	 *
+	 * @param label associated label
+	 * @param propertyKey associated key
+	 * @param min minimum value
+	 * @param max maximum value
+	 */
+	public PWSpinner(final String label, final String propertyKey, final int min, final int max) {
+		super(label, propertyKey, label == null ? 1 : 2, false);
+		this.min = min;
+		this.max = max;
+	}
+
+	/**
+	 * Builds the.
+	 *
+	 * @param parent the parent
+	 * @return the control
+	 * @see org.mihalis.opal.preferenceWindow.widgets.PWWidget#build(org.eclipse.swt.widgets.Composite)
+	 */
+	@Override
+	public Control build(final Composite parent) {
+		buildLabel(parent, GridData.CENTER);
+		final Spinner spinner = new Spinner(parent, SWT.HORIZONTAL | SWT.BORDER);
+		addControl(spinner);
+		spinner.setMinimum(this.min);
+		spinner.setMaximum(this.max);
+		final Integer originalValue = (Integer) PreferenceWindow.getInstance().getValueFor(getPropertyKey());
+		spinner.setSelection(originalValue.intValue());
+
+		spinner.addListener(SWT.Modify, new Listener() {
+			@Override
+			public void handleEvent(final Event event) {
+				PreferenceWindow.getInstance().setValue(getPropertyKey(), Integer.valueOf(spinner.getSelection()));
+			}
+		});
+
+		return spinner;
+	}
+
+	/**
+	 * Check.
+	 *
+	 * @see org.mihalis.opal.preferenceWindow.widgets.PWWidget#check()
+	 */
+	@Override
+	public void check() {
+		final Object value = PreferenceWindow.getInstance().getValueFor(getPropertyKey());
+		if (value == null) {
+			PreferenceWindow.getInstance().setValue(getPropertyKey(), Integer.valueOf(this.min));
+		} else {
+			if (!(value instanceof Integer)) {
+				throw new UnsupportedOperationException("The property '" + getPropertyKey() + "' has to be an Integer because it is associated to a spinner");
+			}
+
+			final int valueAsInt = ((Integer) value).intValue();
+			if (valueAsInt < this.min || valueAsInt > this.max) {
+				throw new UnsupportedOperationException("The property '" + getPropertyKey() + "' is out of range (value is " + valueAsInt + ", range is " + this.min + "-" + this.max + ")");
+			}
+		}
+	}
+
+}