| /******************************************************************************* |
| * Copyright (c) 2000, 2005 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 |
| *******************************************************************************/ |
| package org.eclipse.swt.snippets; |
| |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.custom.*; |
| import org.eclipse.swt.events.*; |
| import org.eclipse.swt.graphics.*; |
| import org.eclipse.swt.layout.*; |
| import org.eclipse.swt.widgets.*; |
| |
| /** |
| * StyledText snippet: embed controls |
| * |
| * For a list of all SWT example snippets see |
| * http://www.eclipse.org/swt/snippets/ |
| * |
| * @since 3.2 |
| */ |
| public class Snippet217 { |
| |
| static StyledText styledText; |
| static String text = |
| "This snippet shows how to embed widgets in a StyledText.\n"+ |
| "Here is one: \uFFFC, and here is another: \uFFFC."; |
| static int[] offsets; |
| static Control[] controls; |
| static int MARGIN = 5; |
| |
| static void addControl(Control control, int offset) { |
| StyleRange style = new StyleRange (); |
| style.start = offset; |
| style.length = 1; |
| control.pack(); |
| Rectangle rect = control.getBounds(); |
| int ascent = 2*rect.height/3; |
| int descent = rect.height - ascent; |
| style.metrics = new GlyphMetrics(ascent + MARGIN, descent + MARGIN, rect.width + 2*MARGIN); |
| styledText.setStyleRange(style); |
| } |
| |
| public static void main(String [] args) { |
| final Display display = new Display(); |
| Font font = new Font(display, "Tahoma", 32, SWT.NORMAL); |
| final Shell shell = new Shell(display); |
| shell.setLayout(new GridLayout()); |
| styledText = new StyledText(shell, SWT.WRAP | SWT.BORDER); |
| styledText.setFont(font); |
| styledText.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true)); |
| styledText.setText(text); |
| controls = new Control[2]; |
| Button button = new Button(styledText, SWT.PUSH); |
| button.setText("Button 1"); |
| controls[0] = button; |
| Combo combo = new Combo(styledText, SWT.NONE); |
| combo.add("item 1"); |
| combo.add("another item"); |
| controls[1] = combo; |
| offsets = new int[controls.length]; |
| int lastOffset = 0; |
| for (int i = 0; i < controls.length; i++) { |
| int offset = text.indexOf("\uFFFC", lastOffset); |
| offsets[i] = offset; |
| addControl(controls[i], offsets[i]); |
| lastOffset = offset + 1; |
| } |
| |
| // use a verify listener to keep the offsets up to date |
| styledText.addVerifyListener(new VerifyListener() { |
| public void verifyText(VerifyEvent e) { |
| int start = e.start; |
| int replaceCharCount = e.end - e.start; |
| int newCharCount = e.text.length(); |
| for (int i = 0; i < offsets.length; i++) { |
| int offset = offsets[i]; |
| if (start <= offset && offset < start + replaceCharCount) { |
| // this widget is being deleted from the text |
| if (controls[i] != null && !controls[i].isDisposed()) { |
| controls[i].dispose(); |
| controls[i] = null; |
| } |
| offset = -1; |
| } |
| if (offset != -1 && offset >= start) offset += newCharCount - replaceCharCount; |
| offsets[i] = offset; |
| } |
| } |
| }); |
| |
| // reposition widgets on paint event |
| styledText.addPaintObjectListener(new PaintObjectListener() { |
| public void paintObject(PaintObjectEvent event) { |
| StyleRange style = event.style; |
| int start = style.start; |
| for (int i = 0; i < offsets.length; i++) { |
| int offset = offsets[i]; |
| if (start == offset) { |
| Point pt = controls[i].getSize(); |
| int x = event.x + MARGIN; |
| int y = event.y + event.ascent - 2*pt.y/3; |
| controls[i].setLocation(x, y); |
| break; |
| } |
| } |
| } |
| }); |
| |
| shell.setSize(400, 400); |
| shell.open(); |
| while (!shell.isDisposed()) { |
| if (!display.readAndDispatch()) |
| display.sleep(); |
| } |
| font.dispose(); |
| display.dispose(); |
| } |
| } |