bundles/org.eclipse.ui.workbench/Eclipse UI/org/eclipse/ui/internal/CyclePartAction.java - platform/eclipse.platform.ui - Git at Google

 package org.eclipse.ui.internal;
 /*
  * (c) Copyright IBM Corp. 2000, 2001.
  * All Rights Reserved.
  */
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.events.*;
 import org.eclipse.swt.graphics.Rectangle;
 import org.eclipse.swt.layout.FillLayout;
 import org.eclipse.swt.widgets.*;

 import org.eclipse.ui.*;
 import org.eclipse.ui.help.WorkbenchHelp;

 /**
  * Implements a action to enable the user switch between parts
  * using keyboard.
  */
 public class CyclePartAction extends PageEventAction {
 	boolean forward;
 	private Object selection;

 /**
  * Creates a CyclePartAction.
  */
 protected CyclePartAction(IWorkbenchWindow window, boolean forward) {
 	super("", window); //$NON-NLS-1$
 	this.forward = forward;
 	setText();
 	window.getPartService().addPartListener(this);
 	updateState();
 }
 /**
  * Set text and tooltips in the action.
  */
 protected void setText() {
 	// TBD: Remove text and tooltip when this becomes an invisible action.
 	if (forward) {
 		setText(WorkbenchMessages.getString("CyclePartAction.next.text")); //$NON-NLS-1$
 		setToolTipText(WorkbenchMessages.getString("CyclePartAction.next.toolTip")); //$NON-NLS-1$
 		setAccelerator(SWT.CTRL | SWT.F7);
 		WorkbenchHelp.setHelp(this, IHelpContextIds.CYCLE_PART_FORWARD_ACTION);
 	} else {
 		setText(WorkbenchMessages.getString("CyclePartAction.prev.text")); //$NON-NLS-1$
 		setToolTipText(WorkbenchMessages.getString("CyclePartAction.prev.toolTip")); //$NON-NLS-1$
 		setAccelerator(SWT.CTRL | SWT.SHIFT | SWT.F7);
 		WorkbenchHelp.setHelp(this, IHelpContextIds.CYCLE_PART_BACKWARD_ACTION);
 	}
 }
 /**
  * See IPageListener
  */
 public void pageActivated(IWorkbenchPage page) {
 	super.pageActivated(page);
 	updateState();
 }
 /**
  * See IPageListener
  */
 public void pageClosed(IWorkbenchPage page) {
 	super.pageClosed(page);
 	updateState();
 }
 /**
  * See IPartListener
  */
 public void partOpened(IWorkbenchPart part) {
 	super.partOpened(part);
 	updateState();
 }
 /**
  * See IPartListener
  */
 public void partClosed(IWorkbenchPart part) {
 	super.partClosed(part);
 	updateState();
 }
 /**
  * Dispose the resources cached by this action.
  */
 protected void dispose() {
 }
 /**
  * Updates the enabled state.
  */
 protected void updateState() {
 	WorkbenchPage page = (WorkbenchPage)getActivePage();
 	if (page == null) {
 		setEnabled(false);
 		return;
 	}
 	// enable iff there is at least one other part to switch to
 	// (the editor area counts as one entry)
 	int count = page.getViewReferences().length;
 	if (page.getSortedEditors().length > 0) {
 		++count;
 	}
 	setEnabled(count >= 1);
 }
 /**
  * @see Action#run()
  */
 public void run() {
 	boolean direction = forward;
 	try {
 		IWorkbenchPage page = getActivePage();
 		openDialog((WorkbenchPage)page);
 		activate(page,selection);
 	} finally {
 		forward = direction;
 	}
 }
 /**
  * Activate the selected item.
  */
 public void activate(IWorkbenchPage page,Object selection) {
 	if(selection != null) {
 		if (selection instanceof IEditorReference) {
 			page.setEditorAreaVisible(true);
 		}
 		page.activate(((IWorkbenchPartReference)selection).getPart(true));
 	}
 }
 /*
  * Open a dialog showing all views in the activation order
  */
 private void openDialog(WorkbenchPage page) {
 	selection = null;
 	final Shell dialog = new Shell(getWorkbenchWindow().getShell(),SWT.MODELESS);
 	Display display = dialog.getDisplay();
 	dialog.setLayout(new FillLayout());

 	final Table table = new Table(dialog,SWT.SINGLE | SWT.FULL_SELECTION);
 	table.setHeaderVisible(true);
 	table.setLinesVisible(true);
 	TableColumn tc = new TableColumn(table,SWT.NONE);
 	tc.setResizable(false);
 	tc.setText(getTableHeader());
 	addItems(table,page);
 	switch (table.getItemCount()) {
 		case 0:
 			// do nothing;
 			break;
 		case 1:
 			table.setSelection(0);
 			break;
 		default:
 			if(forward)
 				table.setSelection(1);
 			else
 				table.setSelection(table.getItemCount() - 1);
 	}
 	tc.pack();
 	table.pack();
 	dialog.pack();

  	tc.setWidth(table.getClientArea().width);
 	table.setFocus();
 	table.addFocusListener(new FocusListener() {
 		public void focusGained(FocusEvent e){}
 		public void focusLost(FocusEvent e) {
 			cancel(dialog);
 		}
 	});

 	Rectangle dialogBounds = dialog.getBounds();
 	Rectangle displayBounds = display.getClientArea();
 	dialogBounds.x = (displayBounds.width - dialogBounds.width) / 2;
 	dialogBounds.y = (displayBounds.height - dialogBounds.height) / 2;
 	dialogBounds.height = dialogBounds.height + 3 - table.getHorizontalBar().getSize().y;

 	dialog.setBounds(dialogBounds);

 	table.removeHelpListener(getHelpListener());
 	table.addHelpListener(new HelpListener() {
 		public void helpRequested(HelpEvent event) {
 		}
 	});

 	addMouseListener(table,dialog);
 	addKeyListener(table,dialog);

 	try {
 		dialog.open();
 		while (!dialog.isDisposed()) {
 			if (!display.readAndDispatch())
 				display.sleep();
 		}
 	} finally {
 		if(!dialog.isDisposed()) {
 			cancel(dialog);
 		}
 	}
 }
 /**
  * Returns the string which will be shown in the table header.
  */
 protected String getTableHeader() {
 	return WorkbenchMessages.getString("CyclePartAction.header"); //$NON-NLS-1$
 }
 /**
  * Add all views to the dialog in the activation order
  */
 protected void addItems(Table table,WorkbenchPage page) {
 	IWorkbenchPartReference refs[] = page.getSortedParts();
 	boolean includeEditor = true;
 	for (int i = refs.length - 1; i >= 0 ; i--) {
 		if(refs[i] instanceof IEditorReference) {
 			if(includeEditor) {
 				IEditorReference activeEditor = (IEditorReference)refs[i];
 				TableItem item = new TableItem(table,SWT.NONE);
 				item.setText(WorkbenchMessages.getString("CyclePartAction.editor")); //$NON-NLS-1$
 				item.setImage(activeEditor.getTitleImage());
 				item.setData(activeEditor);
 				includeEditor = false;
 			}
 		} else {
 			TableItem item = new TableItem(table,SWT.NONE);
 			item.setText(refs[i].getTitle());
 			item.setImage(refs[i].getTitleImage());
 			item.setData(refs[i]);
 		}
 	}
 }
 /*
  * Add a key listener to the table shifting the selection when
  * the acelarator key is pressed and closing the dialog when
  * Control or Alt is released.
  */
 private void addKeyListener(final Table table,final Shell dialog) {
 	table.addKeyListener(new KeyListener() {
 		public void keyPressed(KeyEvent e) {
 			int acelaratorKey = getAcceleratorKey();
 			if((e.character == SWT.CR) || (e.character == SWT.LF)) {
 				ok(dialog,table);
 			} else if(e.keyCode == SWT.SHIFT) {
 				forward = false;
 			} else if(e.keyCode == acelaratorKey) {
 				int index = table.getSelectionIndex();
 				if(forward) {
 					index = (index + 1) % table.getItemCount();
 				} else {
 					index--;
 					index = index >= 0 ? index : table.getItemCount() - 1;
 				}
 				table.setSelection(index);
 			} else if ((e.keyCode == SWT.ARROW_DOWN) ||
 				(e.keyCode == SWT.ARROW_UP) ||
 				(e.keyCode == SWT.ARROW_LEFT) ||
 				(e.keyCode == SWT.ARROW_RIGHT)) {
 					//Do nothing.
 			} else {
 				cancel(dialog);
 			}
 		}
 		public void keyReleased(KeyEvent e) {
 			if(e.keyCode == SWT.SHIFT) {
 				forward = true;
 			} else if((e.keyCode == SWT.ALT) || (e.keyCode == SWT.CTRL)) {
 				ok(dialog, table);
 			}
 		}
 	});
 }
 /*
  * Close the dialog saving the selection
  */
 private void ok(Shell dialog, final Table table) {
 	TableItem[] items = table.getSelection();
 	if (items != null && items.length == 1)
 		selection = items[0].getData();
 	dialog.close();
 	dispose();
 }
 /*
  * Close the dialog and set selection to null.
  */
 private void cancel(Shell dialog) {
 	selection = null;
 	dialog.close();
 	dispose();
 }
 /*
  * Add mouse listener to the table closing it when
  * the mouse is pressed.
  */
 private void addMouseListener(final Table table,final Shell dialog) {
 	table.addMouseListener(new MouseListener() {
 		public void mouseDoubleClick(MouseEvent e){
 			ok(dialog,table);
 		}
 		public void mouseDown(MouseEvent e){
 			ok(dialog,table);
 		}
 		public void mouseUp(MouseEvent e){
 			ok(dialog,table);
 		}
 	});
 }
 /*
  * If the acelarator is CTRL+ALT+SHIFT+F6
  * or any combination of CTRL ALT SHIFT
  * return F6
  */
 private int getAcceleratorKey() {
 	int acelaratorKey = getAccelerator();
 	acelaratorKey = acelaratorKey & ~ SWT.CTRL;
 	acelaratorKey = acelaratorKey & ~ SWT.SHIFT;
 	acelaratorKey = acelaratorKey & ~ SWT.ALT;
 	return acelaratorKey;
 }
 }
	package org.eclipse.ui.internal;
	/*
	* (c) Copyright IBM Corp. 2000, 2001.
	* All Rights Reserved.
	*/
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.events.*;
	import org.eclipse.swt.graphics.Rectangle;
	import org.eclipse.swt.layout.FillLayout;
	import org.eclipse.swt.widgets.*;

	import org.eclipse.ui.*;
	import org.eclipse.ui.help.WorkbenchHelp;

	/**
	* Implements a action to enable the user switch between parts
	* using keyboard.
	*/
	public class CyclePartAction extends PageEventAction {
	boolean forward;
	private Object selection;

	/**
	* Creates a CyclePartAction.
	*/
	protected CyclePartAction(IWorkbenchWindow window, boolean forward) {
	super("", window); //$NON-NLS-1$
	this.forward = forward;
	setText();
	window.getPartService().addPartListener(this);
	updateState();
	}
	/**
	* Set text and tooltips in the action.
	*/
	protected void setText() {
	// TBD: Remove text and tooltip when this becomes an invisible action.
	if (forward) {
	setText(WorkbenchMessages.getString("CyclePartAction.next.text")); //$NON-NLS-1$
	setToolTipText(WorkbenchMessages.getString("CyclePartAction.next.toolTip")); //$NON-NLS-1$
	setAccelerator(SWT.CTRL \| SWT.F7);
	WorkbenchHelp.setHelp(this, IHelpContextIds.CYCLE_PART_FORWARD_ACTION);
	} else {
	setText(WorkbenchMessages.getString("CyclePartAction.prev.text")); //$NON-NLS-1$
	setToolTipText(WorkbenchMessages.getString("CyclePartAction.prev.toolTip")); //$NON-NLS-1$
	setAccelerator(SWT.CTRL \| SWT.SHIFT \| SWT.F7);
	WorkbenchHelp.setHelp(this, IHelpContextIds.CYCLE_PART_BACKWARD_ACTION);
	}
	}
	/**
	* See IPageListener
	*/
	public void pageActivated(IWorkbenchPage page) {
	super.pageActivated(page);
	updateState();
	}
	/**
	* See IPageListener
	*/
	public void pageClosed(IWorkbenchPage page) {
	super.pageClosed(page);
	updateState();
	}
	/**
	* See IPartListener
	*/
	public void partOpened(IWorkbenchPart part) {
	super.partOpened(part);
	updateState();
	}
	/**
	* See IPartListener
	*/
	public void partClosed(IWorkbenchPart part) {
	super.partClosed(part);
	updateState();
	}
	/**
	* Dispose the resources cached by this action.
	*/
	protected void dispose() {
	}
	/**
	* Updates the enabled state.
	*/
	protected void updateState() {
	WorkbenchPage page = (WorkbenchPage)getActivePage();
	if (page == null) {
	setEnabled(false);
	return;
	}
	// enable iff there is at least one other part to switch to
	// (the editor area counts as one entry)
	int count = page.getViewReferences().length;
	if (page.getSortedEditors().length > 0) {
	++count;
	}
	setEnabled(count >= 1);
	}
	/**
	* @see Action#run()
	*/
	public void run() {
	boolean direction = forward;
	try {
	IWorkbenchPage page = getActivePage();
	openDialog((WorkbenchPage)page);
	activate(page,selection);
	} finally {
	forward = direction;
	}
	}
	/**
	* Activate the selected item.
	*/
	public void activate(IWorkbenchPage page,Object selection) {
	if(selection != null) {
	if (selection instanceof IEditorReference) {
	page.setEditorAreaVisible(true);
	}
	page.activate(((IWorkbenchPartReference)selection).getPart(true));
	}
	}
	/*
	* Open a dialog showing all views in the activation order
	*/
	private void openDialog(WorkbenchPage page) {
	selection = null;
	final Shell dialog = new Shell(getWorkbenchWindow().getShell(),SWT.MODELESS);
	Display display = dialog.getDisplay();
	dialog.setLayout(new FillLayout());

	final Table table = new Table(dialog,SWT.SINGLE \| SWT.FULL_SELECTION);
	table.setHeaderVisible(true);
	table.setLinesVisible(true);
	TableColumn tc = new TableColumn(table,SWT.NONE);
	tc.setResizable(false);
	tc.setText(getTableHeader());
	addItems(table,page);
	switch (table.getItemCount()) {
	case 0:
	// do nothing;
	break;
	case 1:
	table.setSelection(0);
	break;
	default:
	if(forward)
	table.setSelection(1);
	else
	table.setSelection(table.getItemCount() - 1);
	}
	tc.pack();
	table.pack();
	dialog.pack();

	tc.setWidth(table.getClientArea().width);
	table.setFocus();
	table.addFocusListener(new FocusListener() {
	public void focusGained(FocusEvent e){}
	public void focusLost(FocusEvent e) {
	cancel(dialog);
	}
	});

	Rectangle dialogBounds = dialog.getBounds();
	Rectangle displayBounds = display.getClientArea();
	dialogBounds.x = (displayBounds.width - dialogBounds.width) / 2;
	dialogBounds.y = (displayBounds.height - dialogBounds.height) / 2;
	dialogBounds.height = dialogBounds.height + 3 - table.getHorizontalBar().getSize().y;

	dialog.setBounds(dialogBounds);

	table.removeHelpListener(getHelpListener());
	table.addHelpListener(new HelpListener() {
	public void helpRequested(HelpEvent event) {
	}
	});

	addMouseListener(table,dialog);
	addKeyListener(table,dialog);

	try {
	dialog.open();
	while (!dialog.isDisposed()) {
	if (!display.readAndDispatch())
	display.sleep();
	}
	} finally {
	if(!dialog.isDisposed()) {
	cancel(dialog);
	}
	}
	}
	/**
	* Returns the string which will be shown in the table header.
	*/
	protected String getTableHeader() {
	return WorkbenchMessages.getString("CyclePartAction.header"); //$NON-NLS-1$
	}
	/**
	* Add all views to the dialog in the activation order
	*/
	protected void addItems(Table table,WorkbenchPage page) {
	IWorkbenchPartReference refs[] = page.getSortedParts();
	boolean includeEditor = true;
	for (int i = refs.length - 1; i >= 0 ; i--) {
	if(refs[i] instanceof IEditorReference) {
	if(includeEditor) {
	IEditorReference activeEditor = (IEditorReference)refs[i];
	TableItem item = new TableItem(table,SWT.NONE);
	item.setText(WorkbenchMessages.getString("CyclePartAction.editor")); //$NON-NLS-1$
	item.setImage(activeEditor.getTitleImage());
	item.setData(activeEditor);
	includeEditor = false;
	}
	} else {
	TableItem item = new TableItem(table,SWT.NONE);
	item.setText(refs[i].getTitle());
	item.setImage(refs[i].getTitleImage());
	item.setData(refs[i]);
	}
	}
	}
	/*
	* Add a key listener to the table shifting the selection when
	* the acelarator key is pressed and closing the dialog when
	* Control or Alt is released.
	*/
	private void addKeyListener(final Table table,final Shell dialog) {
	table.addKeyListener(new KeyListener() {
	public void keyPressed(KeyEvent e) {
	int acelaratorKey = getAcceleratorKey();
	if((e.character == SWT.CR) \|\| (e.character == SWT.LF)) {
	ok(dialog,table);
	} else if(e.keyCode == SWT.SHIFT) {
	forward = false;
	} else if(e.keyCode == acelaratorKey) {
	int index = table.getSelectionIndex();
	if(forward) {
	index = (index + 1) % table.getItemCount();
	} else {
	index--;
	index = index >= 0 ? index : table.getItemCount() - 1;
	}
	table.setSelection(index);
	} else if ((e.keyCode == SWT.ARROW_DOWN) \|\|
	(e.keyCode == SWT.ARROW_UP) \|\|
	(e.keyCode == SWT.ARROW_LEFT) \|\|
	(e.keyCode == SWT.ARROW_RIGHT)) {
	//Do nothing.
	} else {
	cancel(dialog);
	}
	}
	public void keyReleased(KeyEvent e) {
	if(e.keyCode == SWT.SHIFT) {
	forward = true;
	} else if((e.keyCode == SWT.ALT) \|\| (e.keyCode == SWT.CTRL)) {
	ok(dialog, table);
	}
	}
	});
	}
	/*
	* Close the dialog saving the selection
	*/
	private void ok(Shell dialog, final Table table) {
	TableItem[] items = table.getSelection();
	if (items != null && items.length == 1)
	selection = items[0].getData();
	dialog.close();
	dispose();
	}
	/*
	* Close the dialog and set selection to null.
	*/
	private void cancel(Shell dialog) {
	selection = null;
	dialog.close();
	dispose();
	}
	/*
	* Add mouse listener to the table closing it when
	* the mouse is pressed.
	*/
	private void addMouseListener(final Table table,final Shell dialog) {
	table.addMouseListener(new MouseListener() {
	public void mouseDoubleClick(MouseEvent e){
	ok(dialog,table);
	}
	public void mouseDown(MouseEvent e){
	ok(dialog,table);
	}
	public void mouseUp(MouseEvent e){
	ok(dialog,table);
	}
	});
	}
	/*
	* If the acelarator is CTRL+ALT+SHIFT+F6
	* or any combination of CTRL ALT SHIFT
	* return F6
	*/
	private int getAcceleratorKey() {
	int acelaratorKey = getAccelerator();
	acelaratorKey = acelaratorKey & ~ SWT.CTRL;
	acelaratorKey = acelaratorKey & ~ SWT.SHIFT;
	acelaratorKey = acelaratorKey & ~ SWT.ALT;
	return acelaratorKey;
	}
	}