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jfreechart example source code file (SWTTitleEditor.java)

This example jfreechart source code file (SWTTitleEditor.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - jfreechart tags/keywords

button, button, color, colordialog, font, fontdata, griddata, label, label, selectionadapter, text, text, texttitle, texttitle, util

The jfreechart SWTTitleEditor.java source code

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2008, by Object Refinery Limited and Contributors.
 *
 * Project Info:  http://www.jfree.org/jfreechart/index.html
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or
 * (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
 * USA.
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
 * in the United States and other countries.]
 *
 * -------------------
 * SWTTitleEditor.java
 * -------------------
 * (C) Copyright 2006-2008, by Henry Proudhon and Contributors.
 *
 * Original Author:  Henry Proudhon (henry.proudhon AT ensmp.fr);
 * Contributor(s):   David Gilbert (for Object Refinery Limited);
 *
 * Changes
 * -------
 * 01-Aug-2006 : New class (HP);
 * 18-Dec-2008 : Use ResourceBundleWrapper - see patch 1607918 by
 *               Jess Thrysoee (DG);
 *
 */

package org.jfree.experimental.chart.swt.editor;

import java.util.ResourceBundle;

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.FontData;
import org.eclipse.swt.graphics.RGB;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.ColorDialog;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.FontDialog;
import org.eclipse.swt.widgets.Group;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Text;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.title.TextTitle;
import org.jfree.chart.title.Title;
import org.jfree.chart.util.ResourceBundleWrapper;
import org.jfree.experimental.swt.SWTPaintCanvas;
import org.jfree.experimental.swt.SWTUtils;

/**
 * An editor for chart title properties.
 */
class SWTTitleEditor extends Composite {

    /** Whether or not to display the title on the chart. */
    private boolean showTitle;

    /** The checkbox to indicate whether or not to display the title. */
    private Button showTitleCheckBox;

    /** A field for displaying/editing the title text. */
    private Text titleField;

    /** The font used to draw the title. */
    private FontData titleFont;

    /** A field for displaying a description of the title font. */
    private Text fontField;

    /** The button to use to select a new title font. */
    private Button selectFontButton;

    /** The paint (color) used to draw the title. */
    private Color titleColor;

    /** The button to use to select a new paint (color) to draw the title. */
    private Button selectColorButton;

    /** The resourceBundle for the localization. */
    protected static ResourceBundle localizationResources
            = ResourceBundleWrapper.getBundle(
                    "org.jfree.chart.editor.LocalizationBundle");

    /** Font object used to handle a change of font. */
    private Font font;

    /**
     * Standard constructor: builds a panel for displaying/editing the
     * properties of the specified title.
     *
     * @param parent  the parent.
     * @param style  the style.
     * @param title  the title, which should be changed.
     *
     */
    SWTTitleEditor(Composite parent, int style, Title title) {
        super(parent, style);
        FillLayout layout = new FillLayout();
        layout.marginHeight = layout.marginWidth = 4;
        setLayout(layout);

        TextTitle t = (title != null ? (TextTitle) title
                : new TextTitle(localizationResources.getString("Title")));
        this.showTitle = (title != null);
        this.titleFont = SWTUtils.toSwtFontData(getDisplay(), t.getFont(),
                true);
        this.titleColor = SWTUtils.toSwtColor(getDisplay(), t.getPaint());

        Group general = new Group(this, SWT.NONE);
        general.setLayout(new GridLayout(3, false));
        general.setText(localizationResources.getString("General"));
        // row 1
        Label label = new Label(general, SWT.NONE);
        label.setText(localizationResources.getString("Show_Title"));
        GridData gridData = new GridData();
        gridData.horizontalSpan = 2;
        label.setLayoutData(gridData);
        this.showTitleCheckBox = new Button(general, SWT.CHECK);
        this.showTitleCheckBox.setSelection(this.showTitle);
        this.showTitleCheckBox.setLayoutData(new GridData(SWT.CENTER,
                SWT.CENTER, false, false));
        this.showTitleCheckBox.addSelectionListener(
                new SelectionAdapter() {
                    public void widgetSelected(SelectionEvent event) {
                        SWTTitleEditor.this.showTitle = SWTTitleEditor.this
                                .showTitleCheckBox.getSelection();
                    }
                });
        // row 2
        new Label(general, SWT.NONE).setText(localizationResources.getString(
                "Text"));
        this.titleField = new Text(general, SWT.BORDER);
        this.titleField.setText(t.getText());
        this.titleField.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true,
                false));
        new Label(general, SWT.NONE).setText("");
        // row 3
        new Label(general, SWT.NONE).setText(localizationResources.getString(
                "Font"));
        this.fontField = new Text(general, SWT.BORDER);
        this.fontField.setText(this.titleFont.toString());
        this.fontField.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true,
                false));
        this.selectFontButton = new Button(general, SWT.PUSH);
        this.selectFontButton.setText(localizationResources.getString(
                "Select..."));
        this.selectFontButton.addSelectionListener(
                new SelectionAdapter() {
                    public void widgetSelected(SelectionEvent event) {
                        // Create the font-change dialog
                        FontDialog dlg = new FontDialog(getShell());
                        dlg.setText(localizationResources.getString(
                                "Font_Selection"));
                        dlg.setFontList(new FontData[] {
                                SWTTitleEditor.this.titleFont });
                        if (dlg.open() != null) {
                            // Dispose of any fonts we have created
                            if (SWTTitleEditor.this.font != null) {
                                SWTTitleEditor.this.font.dispose();
                            }
                            // Create the new font and set it into the title
                            // label
                            SWTTitleEditor.this.font = new Font(
                                    getShell().getDisplay(), dlg.getFontList());
                            //titleField.setFont(font);
                            SWTTitleEditor.this.fontField.setText(
                                    SWTTitleEditor.this.font.getFontData()[0]
                                    .toString());
                            SWTTitleEditor.this.titleFont
                                    = SWTTitleEditor.this.font.getFontData()[0];
                        }
                    }
                }
        );
        // row 4
        new Label(general, SWT.NONE).setText(localizationResources.getString(
                "Color"));
        // Use a SwtPaintCanvas to show the color, note that we must set the
        // heightHint.
        final SWTPaintCanvas colorCanvas = new SWTPaintCanvas(general,
                SWT.NONE, this.titleColor);
        GridData canvasGridData = new GridData(SWT.FILL, SWT.CENTER, true,
                false);
        canvasGridData.heightHint = 20;
        colorCanvas.setLayoutData(canvasGridData);
        this.selectColorButton = new Button(general, SWT.PUSH);
        this.selectColorButton.setText(localizationResources.getString(
                "Select..."));
        this.selectColorButton.addSelectionListener(
                new SelectionAdapter() {
                    public void widgetSelected(SelectionEvent event) {
                        // Create the color-change dialog
                        ColorDialog dlg = new ColorDialog(getShell());
                        dlg.setText(localizationResources.getString(
                                "Title_Color"));
                        dlg.setRGB(SWTTitleEditor.this.titleColor.getRGB());
                        RGB rgb = dlg.open();
                        if (rgb != null) {
                            // create the new color and set it to the
                            // SwtPaintCanvas
                            SWTTitleEditor.this.titleColor = new Color(
                                    getDisplay(), rgb);
                            colorCanvas.setColor(
                                    SWTTitleEditor.this.titleColor);
                        }
                    }
                }
        );
    }

    /**
     * Returns the title text entered in the panel.
     *
     * @return The title text entered in the panel.
     */
    public String getTitleText() {
        return this.titleField.getText();
    }

    /**
     * Returns the font selected in the panel.
     *
     * @return The font selected in the panel.
     */
    public FontData getTitleFont() {
        return this.titleFont;
    }

    /**
     * Returns the font selected in the panel.
     *
     * @return The font selected in the panel.
     */
    public Color getTitleColor() {
        return this.titleColor;
    }

    /**
     * Sets the properties of the specified title to match the properties
     * defined on this panel.
     *
     * @param chart  the chart whose title is to be modified.
     */
    public void setTitleProperties(JFreeChart chart) {
        if (this.showTitle) {
            TextTitle title = chart.getTitle();
            if (title == null) {
                title = new TextTitle();
                chart.setTitle(title);
            }
            title.setText(getTitleText());
            title.setFont(SWTUtils.toAwtFont(getDisplay(), getTitleFont(),
                    true));
            title.setPaint(SWTUtils.toAwtColor(getTitleColor()));
        }
        else {
            chart.setTitle((TextTitle) null);
        }
    }
}

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