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将RTF/HTML字符串绘制到自定义swing组件中

rtf swing html java

0

Sam Barnum · 技术社区 · 16 年前

然后,我需要在自定义组件中的特定坐标处渲染许多这些样式注释。

public View createView() throws IOException, BadLocationException {
 RTFEditorKit kit = new RTFEditorKit();
 final Document document = kit.createDefaultDocument();
 kit.read(new ByteArrayInputStream(text.getBytes("UTF-8")), document, 0);
 return kit.getViewFactory().create(document.getDefaultRootElement());
}

majorAxis = 1
majorSpan = 0
minorSpan = 0
majorReqValid = false
minorReqValid = false
majorRequest = null
minorRequest = null
majorAllocValid = false
majorOffsets = {int[0]@2321}
majorSpans = {int[0]@2322}
minorAllocValid = false
minorOffsets = {int[0]@2323}
minorSpans = {int[0]@2324}
tempRect = {java.awt.Rectangle@2325}"java.awt.Rectangle[x=0,y=0,width=0,height=0]"
children = {javax.swing.text.View[1]@2326}
nchildren = 0
left = 0
right = 0
top = 0
bottom = 0
childAlloc = {java.awt.Rectangle@2327}"java.awt.Rectangle[x=0,y=0,width=0,height=0]"
parent = null
elem = {javax.swing.text.DefaultStyledDocument$SectionElement@2328}"BranchElement(section) 0,35\n"

JTextPane.getUI().paint ,但文本窗格需要可见,这感觉是错误的做法。

是否有任何方法可以在不呈现实际JTextPane的情况下获得RTF内容的视觉表示?

2 回复 | 直到 16 年前

1

0

camickr 16 年前

这段代码有点有效,但似乎不太理想。有更好的方法吗?此外,在图形上除0,0之外的其他位置渲染文本的好方法是什么?

private static void testRtfRender() {
    String s = "{\\rtf1\\ansi\n" +
            "{\\fonttbl\\f0\\fnil Monospaced;\\f1\\fnil Lucida Grande;}\n" +
            "\n" +
            "\\f1\\fs26\\i0\\b0\\cf0 this is a \\b test\\b0\\par\n" +
            "}";

    JTextPane pane = new JTextPane();
    pane.setContentType("text/rtf");
    pane.setText(s);

    final Dimension preferredSize = pane.getUI().getPreferredSize(pane);
    int w = preferredSize.width;
    int h = preferredSize.height;

    pane.setSize(w, h);
    pane.addNotify();
    pane.validate();

    // would be nice to use this box view instead of instantiating a UI
    // however, unless you call setParent() on the view it's useless
    // What should the parent of a root element be?
    //BoxView view = (BoxView) pane.getEditorKit().getViewFactory().create(pane.getStyledDocument().getDefaultRootElement());
    //view.paint(d, new Rectangle(w, h));

    BufferedImage img = new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB);
    final Graphics2D d = img.createGraphics();
    d.setClip(0, 0, w, h); // throws a NullPointerException if I leave this out
    pane.getUI().paint(d, pane);
    d.dispose();
    JOptionPane.showMessageDialog(null, new JLabel(new ImageIcon(img)));
}

2

1

Sam Barnum 16 年前

ScreenImage 类,它允许您创建任何Swing组件的BufferedImage。它也应该适用于不可见的Swing组件,但是的,您必须先进行渲染。