Bug #550 - Open the NebulaSlider to allow user extension

widgets/nebulaslider/org.eclipse.nebula.widgets.nebulaslider.snippets/src/org/eclipse/nebula/widgets/opal/nebulaslider/snippets/NebulaCustomSliderRenderer.java

@@ -0,0 +1,128 @@
+package org.eclipse.nebula.widgets.opal.nebulaslider.snippets;
+
+import org.eclipse.nebula.widgets.opal.nebulaslider.NebulaSlider;
+import org.eclipse.nebula.widgets.opal.nebulaslider.NebularDefaultSliderRenderer;
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.graphics.Color;
+import org.eclipse.swt.graphics.Font;
+import org.eclipse.swt.graphics.FontData;
+
+public class NebulaCustomSliderRenderer extends NebularDefaultSliderRenderer {
+
+	public NebulaCustomSliderRenderer(final NebulaSlider parentSlider) {
+		super(parentSlider);
+	}
+
+	/**
+	 * @see org.eclipse.nebula.widgets.opal.nebulaslider.NebularDefaultSliderRenderer#getBarInsideColor()
+	 */
+	@Override
+	public Color getBarInsideColor() {
+		return getAndDisposeColor(231, 225, 219);
+	}
+
+	/**
+	 * @see org.eclipse.nebula.widgets.opal.nebulaslider.NebularDefaultSliderRenderer#getBarBorderColor()
+	 */
+	@Override
+	public Color getBarBorderColor() {
+		return getAndDisposeColor(219, 211, 203);
+	}
+
+	/**
+	 * @see org.eclipse.nebula.widgets.opal.nebulaslider.NebularDefaultSliderRenderer#getBarSelectionColor()
+	 */
+	@Override
+	public Color getBarSelectionColor() {
+		return getAndDisposeColor(129, 108, 91);
+	}
+
+	/**
+	 * @see org.eclipse.nebula.widgets.opal.nebulaslider.NebularDefaultSliderRenderer#getSelectorColor()
+	 */
+	@Override
+	public Color getSelectorColor() {
+		return getAndDisposeColor(148, 130, 113);
+	}
+
+	/**
+	 * @see org.eclipse.nebula.widgets.opal.nebulaslider.NebularDefaultSliderRenderer#getSelectorColorBorder()
+	 */
+	@Override
+	public Color getSelectorColorBorder() {
+		return getAndDisposeColor(238, 234, 230);
+	}
+
+	/**
+	 * @see org.eclipse.nebula.widgets.opal.nebulaslider.NebularDefaultSliderRenderer#getSelectorTextColor()
+	 */
+	@Override
+	public Color getSelectorTextColor() {
+		return getAndDisposeColor(255, 255, 204);
+	}
+
+	/**
+	 * @see org.eclipse.nebula.widgets.opal.nebulaslider.NebularDefaultSliderRenderer#getArrowColor()
+	 */
+	@Override
+	public Color getArrowColor() {
+		return getAndDisposeColor(203, 192, 181);
+	}
+
+	/**
+	 * @see org.eclipse.nebula.widgets.opal.nebulaslider.NebularDefaultSliderRenderer#getTextFont()
+	 */
+	@Override
+	public Font getTextFont() {
+		final FontData fontData = parentSlider.getFont().getFontData()[0];
+		final Font newFont = new Font(parentSlider.getDisplay(), "Arial", Math.max(fontData.getHeight(), 14), SWT.ITALIC);
+		parentSlider.addDisposeListener(e -> {
+			if (!newFont.isDisposed()) {
+				newFont.dispose();
+			}
+		});
+		return newFont;
+	}
+
+	/**
+	 * @see org.eclipse.nebula.widgets.opal.nebulaslider.NebularDefaultSliderRenderer#getHorizontalMargin()
+	 */
+	@Override
+	public int getHorizontalMargin() {
+		// TODO Auto-generated method stub
+		return super.getHorizontalMargin();
+	}
+
+	/**
+	 * @see org.eclipse.nebula.widgets.opal.nebulaslider.NebularDefaultSliderRenderer#getSelectorWidth()
+	 */
+	@Override
+	public int getSelectorWidth() {
+		return 100;
+	}
+
+	/**
+	 * @see org.eclipse.nebula.widgets.opal.nebulaslider.NebularDefaultSliderRenderer#getSelectorHeight()
+	 */
+	@Override
+	public int getSelectorHeight() {
+		return 40;
+	}
+
+	/**
+	 * @see org.eclipse.nebula.widgets.opal.nebulaslider.NebularDefaultSliderRenderer#getBarHeight()
+	 */
+	@Override
+	public int getBarHeight() {
+		return 18;
+	}
+
+	/**
+	 * @see org.eclipse.nebula.widgets.opal.nebulaslider.NebularDefaultSliderRenderer#getArrowLineWidth()
+	 */
+	@Override
+	public int getArrowLineWidth() {
+		return 5;
+	}
+
+}

widgets/nebulaslider/org.eclipse.nebula.widgets.nebulaslider.snippets/src/org/eclipse/nebula/widgets/opal/nebulaslider/snippets/NebulaSliderSnippet.java

@@ -4,7 +4,7 @@
  * are made available under the terms of the Eclipse Public License 2.0
  * which accompanies this distribution, and is available at
  * https://www.eclipse.org/legal/epl-2.0/
- * 
+ *
  * SPDX-License-Identifier: EPL-2.0
  *
  * Contributors: Laurent CARON ([email protected])
@@ -13,8 +13,6 @@
 
 import org.eclipse.nebula.widgets.opal.nebulaslider.NebulaSlider;
 import org.eclipse.swt.SWT;
-import org.eclipse.swt.events.SelectionAdapter;
-import org.eclipse.swt.events.SelectionEvent;
 import org.eclipse.swt.layout.GridData;
 import org.eclipse.swt.layout.GridLayout;
 import org.eclipse.swt.widgets.Button;
@@ -53,11 +51,8 @@ public static void main(final String[] args) {
 		slider.setValue(632);
 		slider.setBackground(display.getSystemColor(SWT.COLOR_WHITE));
 
-		slider.addSelectionListener(new SelectionAdapter() {
-			@Override
-			public void widgetSelected(SelectionEvent e) {
-				System.out.println("New value is " + slider.getValue());
-			}
+		slider.addListener(SWT.Selection, e -> {
+			System.out.println("New value is " + slider.getValue());
 		});
 
 		final GridData layoutData = new GridData(GridData.FILL, GridData.CENTER, true, false, 2, 1);
@@ -116,14 +111,14 @@ public void widgetSelected(SelectionEvent e) {
 		display.dispose();
 	}
 
-	private static void createLeftLabel(Shell shell, String text) {
+	private static void createLeftLabel(final Shell shell, final String text) {
 		final Label lbl = new Label(shell, SWT.NONE);
 		lbl.setText(text);
 		lbl.setBackground(shell.getDisplay().getSystemColor(SWT.COLOR_WHITE));
 		lbl.setLayoutData(new GridData(GridData.END, GridData.CENTER, false, false));
 	}
 
-	private static Text createTextWidget(Shell shell, int value) {
+	private static Text createTextWidget(final Shell shell, final int value) {
 		final Text txt = new Text(shell, SWT.BORDER);
 		txt.setText(String.valueOf(value));
 		txt.setTextLimit(3);

widgets/nebulaslider/org.eclipse.nebula.widgets.nebulaslider.snippets/src/org/eclipse/nebula/widgets/opal/nebulaslider/snippets/NebulaSliderSnippetOtherRenderer.java

@@ -0,0 +1,138 @@
+/*******************************************************************************
+ * Copyright (c) 2011 Laurent CARON.
+ * This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License 2.0
+ * which accompanies this distribution, and is available at
+ * https://www.eclipse.org/legal/epl-2.0/
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ * Contributors: Laurent CARON ([email protected])
+ *******************************************************************************/
+package org.eclipse.nebula.widgets.opal.nebulaslider.snippets;
+
+import org.eclipse.nebula.widgets.opal.nebulaslider.NebulaSlider;
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.layout.GridData;
+import org.eclipse.swt.layout.GridLayout;
+import org.eclipse.swt.widgets.Button;
+import org.eclipse.swt.widgets.Display;
+import org.eclipse.swt.widgets.Label;
+import org.eclipse.swt.widgets.MessageBox;
+import org.eclipse.swt.widgets.Shell;
+import org.eclipse.swt.widgets.Text;
+
+/**
+ * A simple snippet for the TextAssist Widget
+ */
+public class NebulaSliderSnippetOtherRenderer {
+	public static void main(final String[] args) {
+		final Display display = new Display();
+		final Shell shell = new Shell(display);
+		shell.setLayout(new GridLayout(2, false));
+		shell.setBackground(display.getSystemColor(SWT.COLOR_WHITE));
+
+		createLeftLabel(shell, "Minimum");
+		final Text min = createTextWidget(shell, 0);
+
+		createLeftLabel(shell, "Maximum");
+		final Text max = createTextWidget(shell, 1000);
+
+		createLeftLabel(shell, "Value");
+		final Text value = createTextWidget(shell, 632);
+
+		final Button update = new Button(shell, SWT.PUSH);
+		update.setLayoutData(new GridData(GridData.END, GridData.CENTER, false, false, 2, 1));
+		update.setText("Redraw Slider");
+
+		final NebulaSlider slider = new NebulaSlider(shell, SWT.NONE);
+		slider.setMinimum(0);
+		slider.setMaximum(1000);
+		slider.setValue(632);
+		slider.setRenderer(new NebulaCustomSliderRenderer(slider));
+		slider.setBackground(display.getSystemColor(SWT.COLOR_WHITE));
+
+		slider.addListener(SWT.Selection, e -> {
+			System.out.println("New value is " + slider.getValue());
+		});
+
+		final GridData layoutData = new GridData(GridData.FILL, GridData.CENTER, true, false, 2, 1);
+		layoutData.widthHint = 600;
+		layoutData.heightHint = 50;
+		slider.setLayoutData(layoutData);
+
+		update.addListener(SWT.Selection, e -> {
+			int minValue = 0;
+			try {
+				minValue = Integer.valueOf(min.getText());
+			} catch (final NumberFormatException nfe) {
+				showError(shell, "The value [" + min.getText() + "] is not a number");
+				return;
+			}
+
+			int maxValue = 0;
+			try {
+				maxValue = Integer.valueOf(max.getText());
+			} catch (final NumberFormatException nfe) {
+				showError(shell, "The value [" + max.getText() + "] is not a number");
+				return;
+			}
+
+			if (maxValue < minValue) {
+				showError(shell, "The minimum is greater than the maximum");
+				return;
+			}
+			//
+			int newValue = 0;
+			try {
+				newValue = Integer.valueOf(value.getText());
+			} catch (final NumberFormatException nfe) {
+				showError(shell, "The value [" + value.getText() + "] is not a number");
+				return;
+			}
+			if (newValue < minValue || newValue > maxValue) {
+				showError(shell, "The value [" + newValue + "] should be between " + minValue + " and " + maxValue);
+				return;
+			}
+			//
+			slider.setMinimum(minValue);
+			slider.setMaximum(maxValue);
+			slider.setValue(newValue);
+
+		});
+
+		shell.pack();
+		shell.open();
+
+		while (!shell.isDisposed()) {
+			if (!display.readAndDispatch()) {
+				display.sleep();
+			}
+		}
+		display.dispose();
+	}
+
+	private static void createLeftLabel(final Shell shell, final String text) {
+		final Label lbl = new Label(shell, SWT.NONE);
+		lbl.setText(text);
+		lbl.setBackground(shell.getDisplay().getSystemColor(SWT.COLOR_WHITE));
+		lbl.setLayoutData(new GridData(GridData.END, GridData.CENTER, false, false));
+	}
+
+	private static Text createTextWidget(final Shell shell, final int value) {
+		final Text txt = new Text(shell, SWT.BORDER);
+		txt.setText(String.valueOf(value));
+		txt.setTextLimit(3);
+		final GridData gd = new GridData(GridData.FILL, GridData.CENTER, false, false);
+		gd.minimumWidth = 40;
+		txt.setLayoutData(gd);
+		return txt;
+	}
+
+	private static void showError(final Shell shell, final String message) {
+		final MessageBox mb = new MessageBox(shell, SWT.ICON_ERROR | SWT.OK);
+		mb.setText("Error");
+		mb.setMessage(message);
+		mb.open();
+	}
+}