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The remainder of the fix for ticket #80.

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git-svn-id: http://svn.osgeo.org/qgis/trunk@5285 c8812cc2-4d05-0410-92ff-de0c093fc19c
This commit is contained in:
g_j_m 2006-04-16 01:25:22 +00:00
parent ca7c535972
commit 2036012b8b
1 changed files with 25 additions and 0 deletions
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25
src/gui/qgsvectorlayer.cpp
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@ -1332,6 +1332,31 @@ QgsRect QgsVectorLayer::bBoxOfSelected()
retval.combineExtentWith(&r); retval.combineExtentWith(&r);
} }
} }
if (retval.width() == 0.0 || retval.height() == 0.0)
{
// If all of the features are at the one point, buffer the
// rectangle a bit. If they are all at zero, do something a bit
// more crude.
if (retval.xMin() == 0.0 && retval.xMax() == 0.0 &&
retval.yMin() == 0.0 && retval.yMax() == 0.0)
{
retval.set(-1.0, -1.0, 1.0, 1.0);
}
else
{
const double padFactor = 0.05;
double widthPad = retval.xMin() * padFactor;
double heightPad = retval.yMin() * padFactor;
double xmin = retval.xMin() - widthPad;
double xmax = retval.xMax() + widthPad;
double ymin = retval.yMin() - heightPad;
double ymax = retval.yMax() + heightPad;
retval.set(xmin, ymin, xmax, ymax);
}
}
return retval; return retval;
} }