Project: SWT
Bug 123184 Embedded image render error in StyledText
Reported: 2006-01-09 22:21:45 | Status: resolved fixed

Run below snippet, and you can find that the second embedded image can't be seen. public class Snippet { static StyledText styledText; static String text = "Embedded Image: \u0014\u0014, The second image can't be seen"; static Image[] images; static int[] offsets; static void addImage(Image image, int offset) { StyleRange style = new StyleRange (); style.start = offset; style.length = 1; Rectangle rect = image.getBounds(); style.metrics = new GlyphMetrics(rect.height, 0, rect.width); styledText.setStyleRange(style); } public static void main(String [] args) { final Display display = new Display(); final Shell shell = new Shell(display); shell.setLayout(new GridLayout()); styledText = new StyledText(shell, SWT.WRAP | SWT.BORDER); styledText.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true)); styledText.setText(text); images = new Image[] { display.getSystemImage(SWT.ICON_QUESTION), display.getSystemImage(SWT.ICON_INFORMATION), }; offsets = new int[images.length]; int lastOffset = 0; for (int i = 0; i < images.length; i++) { int offset = text.indexOf("\u0014", lastOffset); offsets[i] = offset; addImage(images[i], offset); 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 image is being deleted from the text if (images[i] != null && !images[i].isDisposed()) { images[i].dispose(); images[i] = null; } offset = -1; } if (offset != -1 && offset >= start) offset += newCharCount - replaceCharCount; offsets[i] = offset; } } }); styledText.addPaintObjectListener(new PaintObjectListener() { public void paintObject(PaintObjectEvent event) { GC gc = event.gc; StyleRange style = event.style; int start = style.start; for (int i = 0; i < offsets.length; i++) { int offset = offsets[i]; if (start == offset) { Image image = images[i]; int x = event.x; int y = event.y + event.ascent - style.metrics.ascent; gc.drawImage(image, x, y); } } } }); shell.setSize(400, 400); shell.open(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) display.sleep(); } for (int i = 0; i < images.length; i++) { Image image = images[i]; if (image != null && !image.isDisposed()) { image.dispose(); } } display.dispose(); } }

Files changed in fix:
bundles/org.eclipse.swt/Eclipse SWT/common/org/eclipse/swt/graphics/TextStyle.java