如何添加RTF格式的图标？

Question

我正在开发SWT小部件，我有构建拖放功能。每当我拖动文件，它的下载链接应该被转移。

我使用以下代码做到了这一点。

现在我想要的是链接，我希望文件图标显示在链接旁边。例如，如果是word文档，则应显示word文件图标。

final DragSource dragSource = new DragSource(tv.getTree(), DND.DROP_MOVE | DND.DROP_COPY | DND.DragOver );
                dragSource.addDragListener(new DragSourceAdapter(){
                    @Override
                    public void dragFinished(DragSourceEvent event) {
                        dragSource.dispose();
                    }

                    @Override
                    public void dragSetData(DragSourceEvent event) {
                        final TreeItem[] dndSelection = tv.getTree().getSelection();
                        final String[] sourceNames = new String[dndSelection.length];
                        String docName = "document";
                        for (int i = 0; i < dndSelection.length; i++) {
                            final TreeItem item = (TreeItem) dndSelection[i];
                            final PendingTreeNode node = (PendingTreeNode) item
                                    .getData();
                            sourceNames[i] = node.getNodeId();
                            docName = node.getName();
                        }
                        final String filePath = AlfrescoFileUtil.getFileURL(sourceNames[0]);
                        final String viewDetailLink = AlfrescoFileUtil.getSearchFileURL(sourceNames[0]);
                        final String viewDetailsLabel = "View details";
                        StringBuffer finalS = new StringBuffer();
                        finalS.append("{\\rtf1\\ansi\\ansicpg1252\\deff0\\deflang1033{\\fonttbl{\\f0\\fnil\\fcharset0 Calibri;}}{\\colortbl ;\\red0\\green0\\blue255;}{\\*\\generator Msftedit 5.41.21.2509;}\\viewkind4\\uc1\\pard\\sa200\\sl276\\slmult1\\lang9\\f0\\fs22{\\field{\\*\\fldinst{HYPERLINK \"" + filePath + "\"}}{\\fldrslt{\\ul\\cf1 " + docName + "}}}");
                        finalS.append(" | ");
                        finalS.append("{\\field{\\*\\fldinst{HYPERLINK \"" + viewDetailLink + "\"}}{\\fldrslt{\\ul\\cf1 "+ viewDetailsLabel + "}}}}}");
                        event.data = finalS.toString();
                    }
                });
                dragSource.setTransfer(new Transfer[]{RTFTransfer.getInstance()});
                dragSource.notifyListeners(SWT.DragDetect, event);

我想展示类似于下面的内容。

但是它现在显示了这样的东西，没有图标

Answer 1

您是否尝试过使用事件。图像DragSourceEvent的属性？

    return new DragSourceListener() {
        @Override
        public void dragStart(DragSourceEvent event) {
            final Image image   =   xxx.getImage(); // get image
            if (image != null)
                event.image =   image;
            //else
            //  event.doit  =   false;
        }
        @Override
        public void dragSetData(DragSourceEvent event) {
            event.data      =   xxx.getData();      // set data
        }
        @Override
        public void dragFinished(DragSourceEvent event) {
            // On MOVE operations, data should be removed
        }
    };

Answer 2

您可以使用SWTProgram类查找给定文件扩展名的程序图标：

Program program = Program.findProgram("file extension");

ImageData imageData = program.getImageData();