Java tutorial
/* * =========================================================== * 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 com.rcp.wbw.demo.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 com.rcp.wbw.demo.swt.SWTPaintCanvas; import com.rcp.wbw.demo.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); } } }