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Avoid extra space in tooltips
When using QTextDocument to check the natutal size of a text, one has to remove the text margin, which is not useful here. Fixes bug #11353.
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@ -645,6 +645,7 @@ QString formatToolTip(QString text, int em)
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QTextDocument td("");
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td.setHtml(text);
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td.setDefaultFont(QToolTip::font());
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td.setDocumentMargin(0);
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td.setTextWidth(px_width);
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double best_width = td.idealWidth();
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// Set the line wrapping with appropriate width
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