ant/org.eclipse.ant.ui/Remote Ant Support/org/eclipse/ant/internal/ui/antsupport/inputhandler/SWTInputHandler.java - platform/eclipse.platform - Git at Google

 /*******************************************************************************
  * Copyright (c) 2004, 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
  *     Brock Janiczak (brockj@tpg.com.au) - Bug 145736
  *******************************************************************************/

 package org.eclipse.ant.internal.ui.antsupport.inputhandler;

 import java.util.Iterator;

 import org.apache.tools.ant.BuildException;
 import org.apache.tools.ant.input.DefaultInputHandler;
 import org.apache.tools.ant.input.InputRequest;
 import org.apache.tools.ant.input.MultipleChoiceInputRequest;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.events.ModifyEvent;
 import org.eclipse.swt.events.ModifyListener;
 import org.eclipse.swt.events.SelectionAdapter;
 import org.eclipse.swt.events.SelectionEvent;
 import org.eclipse.swt.graphics.FontMetrics;
 import org.eclipse.swt.graphics.GC;
 import org.eclipse.swt.graphics.Point;
 import org.eclipse.swt.layout.GridData;
 import org.eclipse.swt.layout.GridLayout;
 import org.eclipse.swt.widgets.Button;
 import org.eclipse.swt.widgets.Combo;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Control;
 import org.eclipse.swt.widgets.Display;
 import org.eclipse.swt.widgets.Event;
 import org.eclipse.swt.widgets.Label;
 import org.eclipse.swt.widgets.Listener;
 import org.eclipse.swt.widgets.Shell;
 import org.eclipse.swt.widgets.Text;

 public class SWTInputHandler extends DefaultInputHandler {

 	private Text fText;
 	private Combo fCombo;
 	private Text fErrorMessageText;
 	private Button fOkButton;
 	private Shell fDialog;
 	private FontMetrics fFontMetrics;
 	protected InputRequest fRequest;
     private boolean fFirstValidation= true;

 	/* (non-Javadoc)
 	 * @see org.apache.tools.ant.input.InputHandler#handleInput(org.apache.tools.ant.input.InputRequest)
 	 */
 	public void handleInput(InputRequest request) throws BuildException {
 		if (System.getProperty("eclipse.ant.noInput") != null) { //$NON-NLS-1$
 			throw new BuildException(RemoteAntMessages.getString("SWTInputHandler.0")); //$NON-NLS-1$
 		}
 		fFirstValidation= true;
 		fRequest= request;
 		BuildException[] problem= new BuildException[1];
 		Runnable runnable= getHandleInputRunnable(problem);
 		Display.getDefault().syncExec(runnable);
 		if (problem[0] != null) {
 			throw problem[0];
 		}
 	}

 	protected Runnable getHandleInputRunnable(final BuildException[] problem) {
 		return new Runnable() {
 			public void run() {
 				String prompt;
 				if (fRequest instanceof MultipleChoiceInputRequest) {
 					prompt = fRequest.getPrompt();
 				} else {
 					prompt = getPrompt(fRequest);
 				}
 		       	String title= RemoteAntMessages.getString("SWTInputHandler.1"); //$NON-NLS-1$
 		       	boolean[] result = new boolean[1];
 				open(title, prompt, result);

 				if (!result[0]) {
 					problem[0]= new BuildException(RemoteAntMessages.getString("SWTInputHandler.2")); //$NON-NLS-1$
 				}
 			}
 		};
 	}

 	protected void open(String title, String prompt, boolean[] result) {
 		createDialog(title, prompt, result);
 		validateInput();
 		fDialog.open();

 		while (!fDialog.isDisposed()) {
 			if (!fDialog.getDisplay().readAndDispatch()) fDialog.getDisplay().sleep();
 		}
 		Display.getDefault().dispose();
 	}

     private void createDialog(String title, String prompt, boolean[] result) {
         Display display= Display.getDefault();
 		fDialog = new Shell(display, SWT.DIALOG_TRIM | SWT.APPLICATION_MODAL | SWT.RESIZE);
 		initializeDialogUnits(fDialog);
 		fDialog.setLayout(new GridLayout());

 		GridData gd= new GridData(SWT.FILL);
 		gd.horizontalSpan= 2;
 		fDialog.setLayoutData(gd);
 		fDialog.setText(title);
 		Label label= new Label(fDialog, SWT.WRAP);
 		label.setText(prompt);
 		GridData data = new GridData(GridData.GRAB_HORIZONTAL | GridData.GRAB_VERTICAL | GridData.HORIZONTAL_ALIGN_FILL | GridData.VERTICAL_ALIGN_CENTER);

         data.widthHint = convertHorizontalDLUsToPixels(300); //from IDialogConstants.MINIMUM_MESSAGE_AREA_WIDTH
         label.setLayoutData(data);
         label.setFont(fDialog.getFont());

         if (fRequest instanceof MultipleChoiceInputRequest) {
         	fCombo = new Combo(fDialog, SWT.BORDER | SWT.READ_ONLY);
         	fCombo.add(""); //$NON-NLS-1$
         	for (Iterator i = ((MultipleChoiceInputRequest)fRequest).getChoices().iterator();i.hasNext();) {
         		fCombo.add((String)i.next());
         		fCombo.setLayoutData(new GridData(GridData.GRAB_HORIZONTAL| GridData.HORIZONTAL_ALIGN_FILL));
         		fCombo.addSelectionListener(new SelectionAdapter() {
 					public void widgetSelected(SelectionEvent e) {
 						validateInput();
 					}
 				});
         	}
         } else {
 	        fText = new Text(fDialog, SWT.SINGLE | SWT.BORDER);
 	        fText.setLayoutData(new GridData(GridData.GRAB_HORIZONTAL| GridData.HORIZONTAL_ALIGN_FILL));
 	        fText.addModifyListener(new ModifyListener() {
 	            public void modifyText(ModifyEvent e) {
 	                validateInput();
 	            }
 	        });
         }

     	String value = null;
 		try {
 			fRequest.getClass().getMethod("getDefaultValue", new Class[0]); //$NON-NLS-1$
 			value = fRequest.getDefaultValue();
 		} catch (SecurityException e) {
 		} catch (NoSuchMethodException e) {
 			//pre Ant 1.7.0
 		}

 		fErrorMessageText = new Text(fDialog, SWT.READ_ONLY);
         fErrorMessageText.setLayoutData(new GridData(GridData.GRAB_HORIZONTAL | GridData.HORIZONTAL_ALIGN_FILL));
         fErrorMessageText.setBackground(display.getSystemColor(SWT.COLOR_WIDGET_BACKGROUND));

 		createButtonBar(fDialog, result);

 		if (value != null) {
 			if (fCombo != null) {
 				fCombo.select(fCombo.indexOf(value));
 			} else {
 				fText.setText(value);
 				fText.selectAll();
 			}
 		}
 		fDialog.pack();
     }

     protected void setErrorMessage(String errorMessage) {
         fErrorMessageText.setText(errorMessage == null ? "" : errorMessage); //$NON-NLS-1$
         fOkButton.setEnabled(errorMessage == null);
         fErrorMessageText.getParent().update();
     }

     protected void validateInput() {
         String errorMessage = null;
         if (fRequest instanceof MultipleChoiceInputRequest) {
         	fRequest.setInput(fCombo.getText());
         } else {
         	fRequest.setInput(fText.getText());
         }
         if (!fRequest.isInputValid()) {
             if (fFirstValidation) {
                 errorMessage= ""; //$NON-NLS-1$
                 fFirstValidation= false;
             } else {
                 errorMessage= RemoteAntMessages.getString("SWTInputHandler.3"); //$NON-NLS-1$
             }
        }

         setErrorMessage(errorMessage);
     }

     protected Control createButtonBar(Composite parent, boolean[] result) {
         Composite composite = new Composite(parent, SWT.NONE);
         GridLayout layout = new GridLayout();
         layout.numColumns = 2;
         layout.makeColumnsEqualWidth = true;
         composite.setLayout(layout);
         GridData data = new GridData(GridData.HORIZONTAL_ALIGN_END | GridData.VERTICAL_ALIGN_CENTER);
         composite.setLayoutData(data);
         composite.setFont(parent.getFont());

         createButtonsForButtonBar(composite, result);
         return composite;
     }

     protected void createButtonsForButtonBar(Composite parent, final boolean[] result) {
     	fOkButton = new Button(parent, SWT.PUSH);
 		fOkButton.setText(RemoteAntMessages.getString("SWTInputHandler.4")); //$NON-NLS-1$
 		setButtonLayoutData(fOkButton);

 		Button cancel = new Button(parent, SWT.PUSH);
 		cancel.setText(RemoteAntMessages.getString("SWTInputHandler.5")); //$NON-NLS-1$
 		Listener listener = new Listener() {
 			public void handleEvent(Event event) {
 				result[0] = event.widget == fOkButton;
 				fDialog.close();
 			}
 		};
 		setButtonLayoutData(cancel);
 		fOkButton.addListener(SWT.Selection, listener);
 		fDialog.setDefaultButton(fOkButton);
 		cancel.addListener(SWT.Selection, listener);
         //do this here because setting the text will set enablement on the ok button
 		if (fRequest instanceof MultipleChoiceInputRequest) {
 			fCombo.setFocus();
 		} else {
 			fText.setFocus();
 		}
     }

     private void setButtonLayoutData(Button button) {
 		GridData data = new GridData(GridData.HORIZONTAL_ALIGN_FILL);
 		int widthHint = convertHorizontalDLUsToPixels(61); //from IDialogConstants.BUTTON_WIDTH
 		Point minSize = button.computeSize(SWT.DEFAULT, SWT.DEFAULT, true);
 		data.widthHint = Math.max(widthHint, minSize.x);
 		button.setLayoutData(data);
 	}

 	private int convertHorizontalDLUsToPixels(int dlus) {
         // round to the nearest pixel
         return (fFontMetrics.getAverageCharWidth() * dlus + 4 / 2) / 4;
 	}

 	protected void initializeDialogUnits(Control control) {
         // Compute and store a font metric
         GC gc = new GC(control);
         gc.setFont(control.getFont());
         fFontMetrics = gc.getFontMetrics();
         gc.dispose();
     }
 }
	/*******************************************************************************
	* Copyright (c) 2004, 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
	* Brock Janiczak (brockj@tpg.com.au) - Bug 145736
	*******************************************************************************/

	package org.eclipse.ant.internal.ui.antsupport.inputhandler;

	import java.util.Iterator;

	import org.apache.tools.ant.BuildException;
	import org.apache.tools.ant.input.DefaultInputHandler;
	import org.apache.tools.ant.input.InputRequest;
	import org.apache.tools.ant.input.MultipleChoiceInputRequest;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.events.ModifyEvent;
	import org.eclipse.swt.events.ModifyListener;
	import org.eclipse.swt.events.SelectionAdapter;
	import org.eclipse.swt.events.SelectionEvent;
	import org.eclipse.swt.graphics.FontMetrics;
	import org.eclipse.swt.graphics.GC;
	import org.eclipse.swt.graphics.Point;
	import org.eclipse.swt.layout.GridData;
	import org.eclipse.swt.layout.GridLayout;
	import org.eclipse.swt.widgets.Button;
	import org.eclipse.swt.widgets.Combo;
	import org.eclipse.swt.widgets.Composite;
	import org.eclipse.swt.widgets.Control;
	import org.eclipse.swt.widgets.Display;
	import org.eclipse.swt.widgets.Event;
	import org.eclipse.swt.widgets.Label;
	import org.eclipse.swt.widgets.Listener;
	import org.eclipse.swt.widgets.Shell;
	import org.eclipse.swt.widgets.Text;

	public class SWTInputHandler extends DefaultInputHandler {

	private Text fText;
	private Combo fCombo;
	private Text fErrorMessageText;
	private Button fOkButton;
	private Shell fDialog;
	private FontMetrics fFontMetrics;
	protected InputRequest fRequest;
	private boolean fFirstValidation= true;

	/* (non-Javadoc)
	* @see org.apache.tools.ant.input.InputHandler#handleInput(org.apache.tools.ant.input.InputRequest)
	*/
	public void handleInput(InputRequest request) throws BuildException {
	if (System.getProperty("eclipse.ant.noInput") != null) { //$NON-NLS-1$
	throw new BuildException(RemoteAntMessages.getString("SWTInputHandler.0")); //$NON-NLS-1$
	}
	fFirstValidation= true;
	fRequest= request;
	BuildException[] problem= new BuildException[1];
	Runnable runnable= getHandleInputRunnable(problem);
	Display.getDefault().syncExec(runnable);
	if (problem[0] != null) {
	throw problem[0];
	}
	}

	protected Runnable getHandleInputRunnable(final BuildException[] problem) {
	return new Runnable() {
	public void run() {
	String prompt;
	if (fRequest instanceof MultipleChoiceInputRequest) {
	prompt = fRequest.getPrompt();
	} else {
	prompt = getPrompt(fRequest);
	}
	String title= RemoteAntMessages.getString("SWTInputHandler.1"); //$NON-NLS-1$
	boolean[] result = new boolean[1];
	open(title, prompt, result);

	if (!result[0]) {
	problem[0]= new BuildException(RemoteAntMessages.getString("SWTInputHandler.2")); //$NON-NLS-1$
	}
	}
	};
	}

	protected void open(String title, String prompt, boolean[] result) {
	createDialog(title, prompt, result);
	validateInput();
	fDialog.open();

	while (!fDialog.isDisposed()) {
	if (!fDialog.getDisplay().readAndDispatch()) fDialog.getDisplay().sleep();
	}
	Display.getDefault().dispose();
	}

	private void createDialog(String title, String prompt, boolean[] result) {
	Display display= Display.getDefault();
	fDialog = new Shell(display, SWT.DIALOG_TRIM \| SWT.APPLICATION_MODAL \| SWT.RESIZE);
	initializeDialogUnits(fDialog);
	fDialog.setLayout(new GridLayout());

	GridData gd= new GridData(SWT.FILL);
	gd.horizontalSpan= 2;
	fDialog.setLayoutData(gd);
	fDialog.setText(title);
	Label label= new Label(fDialog, SWT.WRAP);
	label.setText(prompt);
	GridData data = new GridData(GridData.GRAB_HORIZONTAL \| GridData.GRAB_VERTICAL \| GridData.HORIZONTAL_ALIGN_FILL \| GridData.VERTICAL_ALIGN_CENTER);

	data.widthHint = convertHorizontalDLUsToPixels(300); //from IDialogConstants.MINIMUM_MESSAGE_AREA_WIDTH
	label.setLayoutData(data);
	label.setFont(fDialog.getFont());

	if (fRequest instanceof MultipleChoiceInputRequest) {
	fCombo = new Combo(fDialog, SWT.BORDER \| SWT.READ_ONLY);
	fCombo.add(""); //$NON-NLS-1$
	for (Iterator i = ((MultipleChoiceInputRequest)fRequest).getChoices().iterator();i.hasNext();) {
	fCombo.add((String)i.next());
	fCombo.setLayoutData(new GridData(GridData.GRAB_HORIZONTAL\| GridData.HORIZONTAL_ALIGN_FILL));
	fCombo.addSelectionListener(new SelectionAdapter() {
	public void widgetSelected(SelectionEvent e) {
	validateInput();
	}
	});
	}
	} else {
	fText = new Text(fDialog, SWT.SINGLE \| SWT.BORDER);
	fText.setLayoutData(new GridData(GridData.GRAB_HORIZONTAL\| GridData.HORIZONTAL_ALIGN_FILL));
	fText.addModifyListener(new ModifyListener() {
	public void modifyText(ModifyEvent e) {
	validateInput();
	}
	});
	}

	String value = null;
	try {
	fRequest.getClass().getMethod("getDefaultValue", new Class[0]); //$NON-NLS-1$
	value = fRequest.getDefaultValue();
	} catch (SecurityException e) {
	} catch (NoSuchMethodException e) {
	//pre Ant 1.7.0
	}

	fErrorMessageText = new Text(fDialog, SWT.READ_ONLY);
	fErrorMessageText.setLayoutData(new GridData(GridData.GRAB_HORIZONTAL \| GridData.HORIZONTAL_ALIGN_FILL));
	fErrorMessageText.setBackground(display.getSystemColor(SWT.COLOR_WIDGET_BACKGROUND));

	createButtonBar(fDialog, result);

	if (value != null) {
	if (fCombo != null) {
	fCombo.select(fCombo.indexOf(value));
	} else {
	fText.setText(value);
	fText.selectAll();
	}
	}
	fDialog.pack();
	}

	protected void setErrorMessage(String errorMessage) {
	fErrorMessageText.setText(errorMessage == null ? "" : errorMessage); //$NON-NLS-1$
	fOkButton.setEnabled(errorMessage == null);
	fErrorMessageText.getParent().update();
	}

	protected void validateInput() {
	String errorMessage = null;
	if (fRequest instanceof MultipleChoiceInputRequest) {
	fRequest.setInput(fCombo.getText());
	} else {
	fRequest.setInput(fText.getText());
	}
	if (!fRequest.isInputValid()) {
	if (fFirstValidation) {
	errorMessage= ""; //$NON-NLS-1$
	fFirstValidation= false;
	} else {
	errorMessage= RemoteAntMessages.getString("SWTInputHandler.3"); //$NON-NLS-1$
	}
	}

	setErrorMessage(errorMessage);
	}

	protected Control createButtonBar(Composite parent, boolean[] result) {
	Composite composite = new Composite(parent, SWT.NONE);
	GridLayout layout = new GridLayout();
	layout.numColumns = 2;
	layout.makeColumnsEqualWidth = true;
	composite.setLayout(layout);
	GridData data = new GridData(GridData.HORIZONTAL_ALIGN_END \| GridData.VERTICAL_ALIGN_CENTER);
	composite.setLayoutData(data);
	composite.setFont(parent.getFont());

	createButtonsForButtonBar(composite, result);
	return composite;
	}

	protected void createButtonsForButtonBar(Composite parent, final boolean[] result) {
	fOkButton = new Button(parent, SWT.PUSH);
	fOkButton.setText(RemoteAntMessages.getString("SWTInputHandler.4")); //$NON-NLS-1$
	setButtonLayoutData(fOkButton);

	Button cancel = new Button(parent, SWT.PUSH);
	cancel.setText(RemoteAntMessages.getString("SWTInputHandler.5")); //$NON-NLS-1$
	Listener listener = new Listener() {
	public void handleEvent(Event event) {
	result[0] = event.widget == fOkButton;
	fDialog.close();
	}
	};
	setButtonLayoutData(cancel);
	fOkButton.addListener(SWT.Selection, listener);
	fDialog.setDefaultButton(fOkButton);
	cancel.addListener(SWT.Selection, listener);
	//do this here because setting the text will set enablement on the ok button
	if (fRequest instanceof MultipleChoiceInputRequest) {
	fCombo.setFocus();
	} else {
	fText.setFocus();
	}
	}

	private void setButtonLayoutData(Button button) {
	GridData data = new GridData(GridData.HORIZONTAL_ALIGN_FILL);
	int widthHint = convertHorizontalDLUsToPixels(61); //from IDialogConstants.BUTTON_WIDTH
	Point minSize = button.computeSize(SWT.DEFAULT, SWT.DEFAULT, true);
	data.widthHint = Math.max(widthHint, minSize.x);
	button.setLayoutData(data);
	}

	private int convertHorizontalDLUsToPixels(int dlus) {
	// round to the nearest pixel
	return (fFontMetrics.getAverageCharWidth() * dlus + 4 / 2) / 4;
	}

	protected void initializeDialogUnits(Control control) {
	// Compute and store a font metric
	GC gc = new GC(control);
	gc.setFont(control.getFont());
	fFontMetrics = gc.getFontMetrics();
	gc.dispose();
	}
	}