1 files changed, 282 insertions, 0 deletions
diff --git a/bundles/org.eclipse.equinox.p2.ui.discovery/src/org/eclipse/equinox/internal/p2/ui/discovery/util/ControlListItem.java b/bundles/org.eclipse.equinox.p2.ui.discovery/src/org/eclipse/equinox/internal/p2/ui/discovery/util/ControlListItem.java
new file mode 100644
index 000000000..86874122c
--- /dev/null
+++ b/bundles/org.eclipse.equinox.p2.ui.discovery/src/org/eclipse/equinox/internal/p2/ui/discovery/util/ControlListItem.java
@@ -0,0 +1,282 @@
+/*******************************************************************************
+ * Copyright (c) 2005, 2009 IBM Corporation and others.
+ * 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:
+ *     IBM Corporation - initial API and implementation
+ *     Tasktop Technologies - generalized ProgressInfoItem for reuse
+ *******************************************************************************/
+
+package org.eclipse.equinox.internal.p2.ui.discovery.util;
+
+import org.eclipse.core.runtime.Assert;
+import org.eclipse.jface.resource.JFaceResources;
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.events.MouseAdapter;
+import org.eclipse.swt.events.MouseEvent;
+import org.eclipse.swt.events.MouseTrackAdapter;
+import org.eclipse.swt.graphics.Color;
+import org.eclipse.swt.graphics.RGB;
+import org.eclipse.swt.layout.GridData;
+import org.eclipse.swt.widgets.Composite;
+import org.eclipse.swt.widgets.Control;
+import org.eclipse.ui.PlatformUI;
+
+/**
+ * Based on {@link org.eclipse.ui.internal.progress.ProgressInfoItem}.
+ * 
+ * @author Steffen Pingel
+ */
+public abstract class ControlListItem<T> extends Composite {
+
+	static String DARK_COLOR_KEY = "org.eclipse.mylyn.commons.ui.ControlListItem.DARK_COLOR"; //$NON-NLS-1$
+
+	interface IndexListener {
+
+		/**
+		 * Select the item previous to the receiver.
+		 */
+		public void selectPrevious();
+
+		/**
+		 * Select the next previous to the receiver.
+		 */
+		public void selectNext();
+
+		/**
+		 * Select the receiver.
+		 */
+		public void select();
+
+		public void open();
+
+	}
+
+	IndexListener indexListener;
+
+	private int currentIndex;
+
+	private boolean selected;
+
+	private final MouseAdapter mouseListener;
+
+	private boolean isShowing = true;
+
+	private final MouseTrackAdapter mouseTrackListener;
+
+	private boolean hot;
+
+	static {
+		// Mac has different Gamma value
+		int shift = "carbon".equals(SWT.getPlatform()) ? -25 : -10;//$NON-NLS-1$ 
+
+		Color lightColor = PlatformUI.getWorkbench().getDisplay().getSystemColor(SWT.COLOR_LIST_BACKGROUND);
+
+		// Determine a dark color by shifting the list color
+		RGB darkRGB = new RGB(Math.max(0, lightColor.getRed() + shift), Math.max(0, lightColor.getGreen() + shift),
+				Math.max(0, lightColor.getBlue() + shift));
+		JFaceResources.getColorRegistry().put(DARK_COLOR_KEY, darkRGB);
+	}
+
+	/**
+	 * Create a new instance of the receiver with the specified parent, style and info object/
+	 * 
+	 * @param parent
+	 * @param style
+	 * @param progressInfo
+	 */
+	public ControlListItem(Composite parent, int style, T element) {
+		super(parent, style | SWT.NO_FOCUS);
+		Assert.isNotNull(element);
+		super.setData(element);
+		setLayoutData(new GridData(SWT.FILL, SWT.NONE, true, false));
+		mouseListener = doCreateMouseListener();
+		mouseTrackListener = doCreateMouseTrackListener();
+		registerChild(this);
+//		Control[] children = getChildren();
+//		for (Control child : children) {
+//			registerChild(child);
+//		}
+		setHot(false);
+	}
+
+	@SuppressWarnings("unchecked")
+	@Override
+	public T getData() {
+		return (T) super.getData();
+	}
+
+	@Override
+	public void setData(Object data) {
+		throw new IllegalArgumentException();
+	}
+
+	private MouseTrackAdapter doCreateMouseTrackListener() {
+		return new MouseTrackAdapter() {
+			private int enterCount;
+
+			@Override
+			public void mouseEnter(MouseEvent e) {
+				enterCount++;
+				updateHotState();
+			}
+
+			@Override
+			public void mouseExit(MouseEvent e) {
+				enterCount--;
+				getDisplay().asyncExec(new Runnable() {
+					public void run() {
+						if (!isDisposed()) {
+							updateHotState();
+						}
+					}
+				});
+			}
+
+			private void updateHotState() {
+				if (enterCount == 0) {
+					if (isHot()) {
+						setHot(false);
+					}
+				} else {
+					if (!isHot()) {
+						setHot(true);
+					}
+				}
+			}
+		};
+	}
+
+	private MouseAdapter doCreateMouseListener() {
+		return new MouseAdapter() {
+			@Override
+			public void mouseDown(MouseEvent e) {
+				if (indexListener != null) {
+					if (e.count == 2) {
+						indexListener.open();
+					} else {
+						indexListener.select();
+					}
+				}
+			}
+		};
+	}
+
+	public boolean isHot() {
+		return hot;
+	}
+
+	public void setHot(boolean hot) {
+		this.hot = hot;
+	}
+
+	protected void registerChild(Control child) {
+		child.addMouseListener(mouseListener);
+		child.addMouseTrackListener(mouseTrackListener);
+
+	}
+
+	/**
+	 * Refresh the contents of the receiver.
+	 */
+	protected abstract void refresh();
+
+	/**
+	 * Set the color base on the index
+	 * 
+	 * @param index
+	 */
+	public void updateColors(int index) {
+		currentIndex = index;
+
+		if (selected) {
+			setBackground(getDisplay().getSystemColor(SWT.COLOR_LIST_SELECTION));
+			setForeground(getDisplay().getSystemColor(SWT.COLOR_LIST_SELECTION_TEXT));
+		} else {
+			if (index % 2 == 0) {
+				setBackground(JFaceResources.getColorRegistry().get(DARK_COLOR_KEY));
+			} else {
+				setBackground(getDisplay().getSystemColor(SWT.COLOR_LIST_BACKGROUND));
+			}
+			setForeground(getDisplay().getSystemColor(SWT.COLOR_LIST_FOREGROUND));
+		}
+	}
+
+	@Override
+	public void setForeground(Color color) {
+		super.setForeground(color);
+		Control[] children = getChildren();
+		for (Control child : children) {
+			child.setForeground(color);
+		}
+	}
+
+	@Override
+	public void setBackground(Color color) {
+		super.setBackground(color);
+		Control[] children = getChildren();
+		for (Control child : children) {
+			child.setBackground(color);
+		}
+	}
+
+	/**
+	 * Set the selection colors.
+	 * 
+	 * @param select
+	 *            boolean that indicates whether or not to show selection.
+	 */
+	public void setSelected(boolean select) {
+		selected = select;
+		updateColors(currentIndex);
+	}
+
+	/**
+	 * Set the listener for index changes.
+	 * 
+	 * @param indexListener
+	 */
+	void setIndexListener(IndexListener indexListener) {
+		this.indexListener = indexListener;
+	}
+
+	/**
+	 * Return whether or not the receiver is selected.
+	 * 
+	 * @return boolean
+	 */
+	public boolean isSelected() {
+		return selected;
+	}
+
+	/**
+	 * Set whether or not the receiver is being displayed based on the top and bottom of the currently visible area.
+	 * 
+	 * @param top
+	 * @param bottom
+	 */
+	void setDisplayed(int top, int bottom) {
+		int itemTop = getLocation().y;
+		int itemBottom = itemTop + getBounds().height;
+		setDisplayed(itemTop <= bottom && itemBottom > top);
+
+	}
+
+	/**
+	 * Set whether or not the receiver is being displayed
+	 * 
+	 * @param displayed
+	 */
+	private void setDisplayed(boolean displayed) {
+		// See if this element has been turned off
+		boolean refresh = !isShowing && displayed;
+		isShowing = displayed;
+		if (refresh) {
+			refresh();
+		}
+	}
+
+}