com.iw.plugins.spindle.ui.dialogfields.StringButtonField.java Source code

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Here is the source code for com.iw.plugins.spindle.ui.dialogfields.StringButtonField.java

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/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Spindle, an Eclipse Plugin for Tapestry.
 *
 * The Initial Developer of the Original Code is
 * Geoffrey Longman.
 * Portions created by the Initial Developer are Copyright (C) 2001-2005
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 * 
 *  glongman@gmail.com
 *
 * ***** END LICENSE BLOCK ***** */
package com.iw.plugins.spindle.ui.dialogfields;

import java.util.Iterator;

import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.operation.IRunnableContext;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.layout.FormAttachment;
import org.eclipse.swt.layout.FormData;
import org.eclipse.swt.layout.FormLayout;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.PlatformUI;

import com.iw.plugins.spindle.core.util.Assert;
import com.iw.plugins.spindle.ui.widgets.PixelConverter;

/**
 * @author GWL
 * @version Copyright 2002, Intelligent Works Incoporated All Rights Reserved
 */
public class StringButtonField extends StringField {

    private Button fButtonControl;

    protected IRunnableContext fRunnableContext;

    public StringButtonField(String label) {
        this(label, -1);
    }

    public StringButtonField(String label, int labelWidth) {
        super(label, labelWidth);
    }

    public boolean isVisible() {
        return super.isVisible() && fButtonControl.isVisible();
    }

    public void setVisible(boolean flag) {
        super.setVisible(flag);
        if (fButtonControl != null && !fButtonControl.isDisposed())
            fButtonControl.setVisible(flag);
    }

    public void init(IRunnableContext context) {
        this.fRunnableContext = context;
    }

    protected IRunnableContext getRunnableContext() {
        return (fRunnableContext == null ? PlatformUI.getWorkbench().getProgressService() : fRunnableContext);
    }

    public Control getControl(Composite parent) {

        Composite container = new Composite(parent, SWT.NULL);

        Label labelWidget = getLabelControl(container);
        Text textControl = getTextControl(container);
        Button buttonControl = getButtonControl(container);

        FormLayout layout = new FormLayout();
        container.setLayout(layout);

        FormData formData;

        formData = new FormData();
        formData.height = 20;
        formData.width = getLabelWidth();
        formData.top = new FormAttachment(0, 5);
        formData.left = new FormAttachment(0, 0);
        //formData.right = new FormAttachment(text, SWT.CENTER);
        labelWidget.setLayoutData(formData);

        formData = new FormData();
        formData.top = new FormAttachment(0, 3);
        formData.left = new FormAttachment(labelWidget, 4);
        formData.right = new FormAttachment(buttonControl, -4);
        textControl.setLayoutData(formData);

        formData = new FormData();
        formData.width = 75;
        formData.height = 25;
        //formData.top = new FormAttachment(0, 60);
        formData.right = new FormAttachment(100, 0);
        buttonControl.setLayoutData(formData);
        return container;

    }

    public void fillIntoGrid(Composite parent, int numcols) {
        Assert.isTrue(numcols >= 3);
        super.fillIntoGrid(parent, numcols - 1);

        PixelConverter converter = new PixelConverter(parent);
        int heightHint = converter.convertVerticalDLUsToPixels(IDialogConstants.BUTTON_HEIGHT);
        int widthHint = converter.convertHorizontalDLUsToPixels(IDialogConstants.BUTTON_WIDTH);

        Button buttonControl = getButtonControl(parent);
        GridData data = new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING);
        data.horizontalSpan = 1;
        data.heightHint = heightHint;
        data.widthHint = Math.max(widthHint, buttonControl.computeSize(SWT.DEFAULT, SWT.DEFAULT, true).x);
        buttonControl.setLayoutData(data);
    }

    public Button getButtonControl(Composite parent) {
        if (fButtonControl == null) {

            fButtonControl = new Button(parent, SWT.PUSH);
            fButtonControl.setText("Browse...");
            fButtonControl.setFont(parent.getFont());

            final DialogField field = this;
            fButtonControl.addSelectionListener(new SelectionListener() {

                public void widgetDefaultSelected(SelectionEvent e) {
                    fireButtonPressed();
                }

                public void widgetSelected(SelectionEvent e) {
                    fireButtonPressed();
                }
            });

        }
        return fButtonControl;
    }

    private void fireButtonPressed() {
        for (Iterator iterator = getListeners().iterator(); iterator.hasNext();) {
            IDialogFieldChangedListener element = (IDialogFieldChangedListener) iterator.next();
            element.dialogFieldButtonPressed(this);
        }
    }

    public void setEnabled(boolean flag) {
        if (fButtonControl != null && !fButtonControl.isDisposed()) {
            fButtonControl.setEnabled(flag);
        }
        super.setEnabled(flag);
    }

    public void setButtonLabel(String value) {
        if (fButtonControl != null && !fButtonControl.isDisposed()) {
            fButtonControl.setText(value);
        }
    }

    public void enableButton(boolean flag) {
        if (fButtonControl != null && !fButtonControl.isDisposed()) {
            fButtonControl.setEnabled(flag);
        }
    }

}