org.eclipse.mylyn.commons.ui/src/org/eclipse/mylyn/internal/provisional/commons/ui/AbstractFilteredTree.java - mylyn/org.eclipse.mylyn.commons - Git at Google

 /*******************************************************************************
  * Copyright (c) 2004, 2008 Tasktop Technologies 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:
  *     Tasktop Technologies - initial API and implementation
  *******************************************************************************/

 package org.eclipse.mylyn.internal.provisional.commons.ui;

 import java.lang.reflect.Field;

 import org.eclipse.core.runtime.IStatus;
 import org.eclipse.core.runtime.Status;
 import org.eclipse.core.runtime.jobs.Job;
 import org.eclipse.jface.layout.GridDataFactory;
 import org.eclipse.mylyn.internal.commons.ui.CommonsUiPlugin;
 import org.eclipse.mylyn.internal.commons.ui.Messages;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.events.ControlAdapter;
 import org.eclipse.swt.events.ControlEvent;
 import org.eclipse.swt.events.FocusEvent;
 import org.eclipse.swt.events.FocusListener;
 import org.eclipse.swt.events.KeyAdapter;
 import org.eclipse.swt.events.KeyEvent;
 import org.eclipse.swt.events.KeyListener;
 import org.eclipse.swt.graphics.Color;
 import org.eclipse.swt.graphics.Font;
 import org.eclipse.swt.graphics.Point;
 import org.eclipse.swt.layout.GridData;
 import org.eclipse.swt.layout.GridLayout;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Control;
 import org.eclipse.ui.dialogs.FilteredTree;
 import org.eclipse.ui.dialogs.PatternFilter;

 /**
  * @author Mik Kersten
  */
 public abstract class AbstractFilteredTree extends EnhancedFilteredTree {

 	private static final int FILTER_WIDTH_MIN = 60;

 	private static final int FILTER_WIDTH_MAX = 300;

 	private static final float FILTER_WIDTH_RATIO = 0.35f;

 	public static final String LABEL_FIND = Messages.AbstractFilteredTree_Find;

 	private Job refreshJob;

 	private AdaptiveRefreshPolicy refreshPolicy;

 	private Composite progressComposite;

 	private Composite searchComposite;

 	private boolean showProgress = false;

 	private Color textColor = null;

 	private Font textFont = null;

 	/**
 	 * XXX: using reflection to gain access
 	 *
 	 * @param parent
 	 * @param treeStyle
 	 * @param filter
 	 */
 	public AbstractFilteredTree(Composite parent, int treeStyle, PatternFilter filter) {
 		super(parent, treeStyle, filter);
 		try {
 			// TODO e3.4 override doCreateRefreshJob() instead
 			Field refreshField = FilteredTree.class.getDeclaredField("refreshJob"); //$NON-NLS-1$
 			refreshField.setAccessible(true);
 			refreshJob = (Job) refreshField.get(this);
 			refreshPolicy = new AdaptiveRefreshPolicy(refreshJob);

 			filterText.addFocusListener(new FocusListener() {

 				public void focusLost(FocusEvent focusEvent) {
 					if ("".equals(filterText.getText())) { //$NON-NLS-1$
 						filterText.setText(LABEL_FIND);
 						setGrayFilterText(true);
 					}
 				}

 				public void focusGained(FocusEvent focusEvent) {
 					if (LABEL_FIND.equals(filterText.getText())) {
 						filterText.setText(""); //$NON-NLS-1$
 						setGrayFilterText(false);
 					}
 				}
 			});

 			filterText.addKeyListener(new KeyListener() {

 				public void keyReleased(KeyEvent e) {
 					// ignore
 				}

 				public void keyPressed(KeyEvent e) {
 					// could consider doing this only on the first keystroke
 					setGrayFilterText(false);
 				}
 			});
 		} catch (Exception e) {
 			CommonsUiPlugin.getDefault().getLog().log(
 					new Status(IStatus.ERROR, CommonsUiPlugin.ID_PLUGIN, "Could not get refresh job", e)); //$NON-NLS-1$
 		}
 		setInitialText(LABEL_FIND);
 	}

 	@Override
 	protected void createControl(Composite parent, int treeStyle) {
 		super.createControl(parent, treeStyle);

 		// Override superclass layout settings...
 		GridLayout layout = (GridLayout) getLayout();
 		layout.verticalSpacing = 0;
 		layout.horizontalSpacing = 0;
 	}

 	@Override
 	protected Control createTreeControl(Composite parent, int style) {
 		progressComposite = createProgressComposite(parent);
 //		progressComposite.setVisible(false);
 //		((GridData) progressComposite.getLayoutData()).exclude = true;

 		searchComposite = createSearchComposite(parent);
 		if (searchComposite != null) {
 			searchComposite.setVisible(false);
 			((GridData) searchComposite.getLayoutData()).exclude = true;
 		}

 		return super.createTreeControl(parent, style);
 	}

 	@Override
 	protected Composite createFilterControls(final Composite parent) {
 		// replace filterComposite by a new composite
 		filterComposite = new Composite(parent.getParent(), SWT.NONE);
 		GridLayout gridLayout = new GridLayout(1, false);
 		gridLayout.marginWidth = 0;
 		gridLayout.marginHeight = 0;
 		gridLayout.marginLeft = 3;
 		gridLayout.marginTop = 5;
 		gridLayout.marginBottom = 3;
 		gridLayout.verticalSpacing = 0;
 		filterComposite.setLayout(gridLayout);

 		// let FilteredTree create the find and clear control
 		super.createFilterControls(parent);
 		GridDataFactory.fillDefaults().align(SWT.BEGINNING, SWT.CENTER).grab(false, false).hint(FILTER_WIDTH_MIN,
 				SWT.DEFAULT).minSize(FILTER_WIDTH_MIN, SWT.DEFAULT).applyTo(parent);
 		filterComposite.addControlListener(new ControlAdapter() {
 			boolean handlingEvents;

 			@Override
 			public void controlResized(ControlEvent e) {
 				if (handlingEvents) {
 					return;
 				}
 				try {
 					handlingEvents = true;
 					Point size = parent.getParent().getSize();
 					int width = Math.max(FILTER_WIDTH_MIN, (int) (size.x * FILTER_WIDTH_RATIO));
 					((GridData) parent.getLayoutData()).widthHint = Math.min(width, FILTER_WIDTH_MAX);
 					parent.getParent().layout();
 				} finally {
 					handlingEvents = false;
 				}
 			}
 		});
 		filterText.addKeyListener(new KeyAdapter() {
 			@Override
 			public void keyPressed(KeyEvent e) {
 				if (e.character == SWT.ESC) {
 					setFilterText(""); //$NON-NLS-1$
 				}
 			}
 		});
 		((GridData) filterText.getLayoutData()).verticalAlignment = SWT.CENTER;

 		// move original filterComposite on new filterComposite
 		parent.setParent(filterComposite);

 		Composite workingSetComposite = createActiveWorkingSetComposite(filterComposite);
 		GridDataFactory.fillDefaults().align(SWT.BEGINNING, SWT.CENTER).grab(false, false).applyTo(workingSetComposite);

 		Composite activeTaskComposite = createActiveTaskComposite(filterComposite);
 		GridDataFactory.fillDefaults().align(SWT.BEGINNING, SWT.CENTER).grab(true, false).applyTo(activeTaskComposite);

 		gridLayout.numColumns = filterComposite.getChildren().length;

 		textColor = filterText.getForeground();
 		textFont = filterText.getFont();
 		setGrayFilterText(true);
 		return parent;
 	}

 	private void setGrayFilterText(boolean gray) {
 		if (gray) {
 			filterText.setForeground(CommonColors.GRAY_MID);
 //			filterText.setFont(CommonFonts.ITALIC);
 		} else {
 			filterText.setForeground(textColor);
 			filterText.setFont(textFont);
 		}
 	}

 	protected abstract Composite createProgressComposite(Composite container);

 	protected abstract Composite createActiveWorkingSetComposite(Composite container);

 	protected abstract Composite createActiveTaskComposite(Composite container);

 	protected Composite createSearchComposite(Composite container) {
 		return null;
 	}

 	@Override
 	protected void textChanged() {
 		// this call allows the filtered tree to preserve the selection when the clear button is used.
 		// It is necessary to correctly set the private narrowingDown flag in the super class.
 		// Note that the scheduling of the refresh job that is done in the super class will be overridden
 		// by the call to refreshPolicy.textChanged().
 		super.textChanged();
 		if (refreshPolicy != null) {
 			if (LABEL_FIND.equals(getFilterString())) {
 				clearText();
 				refreshPolicy.textChanged(""); //$NON-NLS-1$
 			} else {
 				refreshPolicy.textChanged(getFilterString());
 			}
 		}
 		// bug 165353 work-around for premature return at FilteredTree.java:374
 		updateToolbar(true);
 	}

 	@Deprecated
 	protected Job getRefreshJob() {
 		return refreshJob;
 	}

 	public AdaptiveRefreshPolicy getRefreshPolicy() {
 		return refreshPolicy;
 	}

 	public boolean isShowProgress() {
 		return showProgress;
 	}

 	public void setShowProgress(boolean showProgress) {
 		this.showProgress = showProgress;
 		progressComposite.setVisible(showProgress);
 		((GridData) progressComposite.getLayoutData()).exclude = !showProgress;
 		getParent().getParent().layout(true, true);
 	}

 	public void setShowSearch(boolean showSearch) {
 		if (searchComposite != null) {
 			searchComposite.setVisible(showSearch);
 			((GridData) searchComposite.getLayoutData()).exclude = !showSearch;
 			getParent().getParent().layout(true, true);
 		}
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2004, 2008 Tasktop Technologies 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:
	* Tasktop Technologies - initial API and implementation
	*******************************************************************************/

	package org.eclipse.mylyn.internal.provisional.commons.ui;

	import java.lang.reflect.Field;

	import org.eclipse.core.runtime.IStatus;
	import org.eclipse.core.runtime.Status;
	import org.eclipse.core.runtime.jobs.Job;
	import org.eclipse.jface.layout.GridDataFactory;
	import org.eclipse.mylyn.internal.commons.ui.CommonsUiPlugin;
	import org.eclipse.mylyn.internal.commons.ui.Messages;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.events.ControlAdapter;
	import org.eclipse.swt.events.ControlEvent;
	import org.eclipse.swt.events.FocusEvent;
	import org.eclipse.swt.events.FocusListener;
	import org.eclipse.swt.events.KeyAdapter;
	import org.eclipse.swt.events.KeyEvent;
	import org.eclipse.swt.events.KeyListener;
	import org.eclipse.swt.graphics.Color;
	import org.eclipse.swt.graphics.Font;
	import org.eclipse.swt.graphics.Point;
	import org.eclipse.swt.layout.GridData;
	import org.eclipse.swt.layout.GridLayout;
	import org.eclipse.swt.widgets.Composite;
	import org.eclipse.swt.widgets.Control;
	import org.eclipse.ui.dialogs.FilteredTree;
	import org.eclipse.ui.dialogs.PatternFilter;

	/**
	* @author Mik Kersten
	*/
	public abstract class AbstractFilteredTree extends EnhancedFilteredTree {

	private static final int FILTER_WIDTH_MIN = 60;

	private static final int FILTER_WIDTH_MAX = 300;

	private static final float FILTER_WIDTH_RATIO = 0.35f;

	public static final String LABEL_FIND = Messages.AbstractFilteredTree_Find;

	private Job refreshJob;

	private AdaptiveRefreshPolicy refreshPolicy;

	private Composite progressComposite;

	private Composite searchComposite;

	private boolean showProgress = false;

	private Color textColor = null;

	private Font textFont = null;

	/**
	* XXX: using reflection to gain access
	*
	* @param parent
	* @param treeStyle
	* @param filter
	*/
	public AbstractFilteredTree(Composite parent, int treeStyle, PatternFilter filter) {
	super(parent, treeStyle, filter);
	try {
	// TODO e3.4 override doCreateRefreshJob() instead
	Field refreshField = FilteredTree.class.getDeclaredField("refreshJob"); //$NON-NLS-1$
	refreshField.setAccessible(true);
	refreshJob = (Job) refreshField.get(this);
	refreshPolicy = new AdaptiveRefreshPolicy(refreshJob);

	filterText.addFocusListener(new FocusListener() {

	public void focusLost(FocusEvent focusEvent) {
	if ("".equals(filterText.getText())) { //$NON-NLS-1$
	filterText.setText(LABEL_FIND);
	setGrayFilterText(true);
	}
	}

	public void focusGained(FocusEvent focusEvent) {
	if (LABEL_FIND.equals(filterText.getText())) {
	filterText.setText(""); //$NON-NLS-1$
	setGrayFilterText(false);
	}
	}
	});

	filterText.addKeyListener(new KeyListener() {

	public void keyReleased(KeyEvent e) {
	// ignore
	}

	public void keyPressed(KeyEvent e) {
	// could consider doing this only on the first keystroke
	setGrayFilterText(false);
	}
	});
	} catch (Exception e) {
	CommonsUiPlugin.getDefault().getLog().log(
	new Status(IStatus.ERROR, CommonsUiPlugin.ID_PLUGIN, "Could not get refresh job", e)); //$NON-NLS-1$
	}
	setInitialText(LABEL_FIND);
	}

	@Override
	protected void createControl(Composite parent, int treeStyle) {
	super.createControl(parent, treeStyle);

	// Override superclass layout settings...
	GridLayout layout = (GridLayout) getLayout();
	layout.verticalSpacing = 0;
	layout.horizontalSpacing = 0;
	}

	@Override
	protected Control createTreeControl(Composite parent, int style) {
	progressComposite = createProgressComposite(parent);
	// progressComposite.setVisible(false);
	// ((GridData) progressComposite.getLayoutData()).exclude = true;

	searchComposite = createSearchComposite(parent);
	if (searchComposite != null) {
	searchComposite.setVisible(false);
	((GridData) searchComposite.getLayoutData()).exclude = true;
	}

	return super.createTreeControl(parent, style);
	}

	@Override
	protected Composite createFilterControls(final Composite parent) {
	// replace filterComposite by a new composite
	filterComposite = new Composite(parent.getParent(), SWT.NONE);
	GridLayout gridLayout = new GridLayout(1, false);
	gridLayout.marginWidth = 0;
	gridLayout.marginHeight = 0;
	gridLayout.marginLeft = 3;
	gridLayout.marginTop = 5;
	gridLayout.marginBottom = 3;
	gridLayout.verticalSpacing = 0;
	filterComposite.setLayout(gridLayout);

	// let FilteredTree create the find and clear control
	super.createFilterControls(parent);
	GridDataFactory.fillDefaults().align(SWT.BEGINNING, SWT.CENTER).grab(false, false).hint(FILTER_WIDTH_MIN,
	SWT.DEFAULT).minSize(FILTER_WIDTH_MIN, SWT.DEFAULT).applyTo(parent);
	filterComposite.addControlListener(new ControlAdapter() {
	boolean handlingEvents;

	@Override
	public void controlResized(ControlEvent e) {
	if (handlingEvents) {
	return;
	}
	try {
	handlingEvents = true;
	Point size = parent.getParent().getSize();
	int width = Math.max(FILTER_WIDTH_MIN, (int) (size.x * FILTER_WIDTH_RATIO));
	((GridData) parent.getLayoutData()).widthHint = Math.min(width, FILTER_WIDTH_MAX);
	parent.getParent().layout();
	} finally {
	handlingEvents = false;
	}
	}
	});
	filterText.addKeyListener(new KeyAdapter() {
	@Override
	public void keyPressed(KeyEvent e) {
	if (e.character == SWT.ESC) {
	setFilterText(""); //$NON-NLS-1$
	}
	}
	});
	((GridData) filterText.getLayoutData()).verticalAlignment = SWT.CENTER;

	// move original filterComposite on new filterComposite
	parent.setParent(filterComposite);

	Composite workingSetComposite = createActiveWorkingSetComposite(filterComposite);
	GridDataFactory.fillDefaults().align(SWT.BEGINNING, SWT.CENTER).grab(false, false).applyTo(workingSetComposite);

	Composite activeTaskComposite = createActiveTaskComposite(filterComposite);
	GridDataFactory.fillDefaults().align(SWT.BEGINNING, SWT.CENTER).grab(true, false).applyTo(activeTaskComposite);

	gridLayout.numColumns = filterComposite.getChildren().length;

	textColor = filterText.getForeground();
	textFont = filterText.getFont();
	setGrayFilterText(true);
	return parent;
	}

	private void setGrayFilterText(boolean gray) {
	if (gray) {
	filterText.setForeground(CommonColors.GRAY_MID);
	// filterText.setFont(CommonFonts.ITALIC);
	} else {
	filterText.setForeground(textColor);
	filterText.setFont(textFont);
	}
	}

	protected abstract Composite createProgressComposite(Composite container);

	protected abstract Composite createActiveWorkingSetComposite(Composite container);

	protected abstract Composite createActiveTaskComposite(Composite container);

	protected Composite createSearchComposite(Composite container) {
	return null;
	}

	@Override
	protected void textChanged() {
	// this call allows the filtered tree to preserve the selection when the clear button is used.
	// It is necessary to correctly set the private narrowingDown flag in the super class.
	// Note that the scheduling of the refresh job that is done in the super class will be overridden
	// by the call to refreshPolicy.textChanged().
	super.textChanged();
	if (refreshPolicy != null) {
	if (LABEL_FIND.equals(getFilterString())) {
	clearText();
	refreshPolicy.textChanged(""); //$NON-NLS-1$
	} else {
	refreshPolicy.textChanged(getFilterString());
	}
	}
	// bug 165353 work-around for premature return at FilteredTree.java:374
	updateToolbar(true);
	}

	@Deprecated
	protected Job getRefreshJob() {
	return refreshJob;
	}

	public AdaptiveRefreshPolicy getRefreshPolicy() {
	return refreshPolicy;
	}

	public boolean isShowProgress() {
	return showProgress;
	}

	public void setShowProgress(boolean showProgress) {
	this.showProgress = showProgress;
	progressComposite.setVisible(showProgress);
	((GridData) progressComposite.getLayoutData()).exclude = !showProgress;
	getParent().getParent().layout(true, true);
	}

	public void setShowSearch(boolean showSearch) {
	if (searchComposite != null) {
	searchComposite.setVisible(showSearch);
	((GridData) searchComposite.getLayoutData()).exclude = !showSearch;
	getParent().getParent().layout(true, true);
	}
	}
	}