Hi Henric,
"Henric Rosvall" <[EMAIL PROTECTED]> wrote on 03/06/2007 06:18:47 AM:
> I'm trying to implement multiline text just using a text-element and
> some tspans. But in order to do this, I need to know the maximum
> height that the characters of a line can occupy (so I know at what
> position to insert the next line).
> Basically I thought I'd set the value of the Text-element to "Og"
> and then measure the combined height of these characters:
The code below doesn't set the value of the TextElement.
You need to create/fetch a DOM TextNode with the desired
string.
> // Get the maximum rowHeight
> SVGTextElement svgTxt = (SVGTextElement)TextElement;
TextNode tn = doc.createTextNode("Og");
svgTxt.appendChild(tn);
> float minY = Integer.MAX_VALUE;
> float maxY = Integer.MIN_VALUE;
> for (int x = 0; x < strToMeasure.length(); x++)
> {
> SVGRect r = svgTxt.getExtentOfChar(x);
>
> if (r.getY() < minY)
> minY = r.getY();
> if (r.getY() + r.getHeight() > maxY)
> maxY = r.getY() + r.getHeight();
> }
> svgTxt.setNodeValue("");
>
> float rowOffset = maxY - minY;
>
> But the getExtentOfChar-method throws an exception:
> org.w3c.dom.DOMException:
> at org.apache.batik.dom.AbstractNode.createDOMException(Unknown Source)
> at org.apache.batik.dom.svg.SVGTextContentSupport.
> getExtentOfChar(Unknown Source)
> at org.apache.batik.dom.svg.SVGOMTextContentElement.
> getExtentOfChar(Unknown Source)
> at printit.template.controls.MultilineTextTemplateControl.
> setSVGTextElementText(MultilineTextTemplateControl.java:86)
> at printit.template.controls.MultilineTextTemplateControl.
> setText(MultilineTextTemplateControl.java:54)
> at printit.template.controlpanels.MultilineTextControlPanel$1.
> run(MultilineTextControlPanel.java:94)
> at org.apache.batik.util.RunnableQueue.run(Unknown Source)
> at java.lang.Thread.run(Unknown Source)
>
> So, if there is a better way, please tell me. Even a simple unit-
> converter might be bettereven though the distance between the lines
> might not be that accurate. Otherwise, if there really isn't a
> better way, do you have any idea what might be wrong? Is it some
> rendering-issue, like, the string hasn't been rendered, and can
> therefore not be measured?
>
> Regards
> Ehhh.... Definately not Henric Rosvall. He's too leet to write code
> like this :P
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