def testConvertToPainterUnitsNoMapToPixel(self):
"""
Test converting map unit based sizes to painter units when render context has NO map to pixel set
"""
r = QgsRenderContext()
r.setScaleFactor(300 / 25.4) # 300 dpi, to match above test
# start with no min/max scale
c = QgsMapUnitScale()
# since we have no map scale to work with, this makes the gross assumption that map units == points. It's magic, but
# what else can we do?
size = r.convertToPainterUnits(10, QgsUnitTypes.RenderMapUnits, c)
self.assertAlmostEqual(size, 41.66666, places=3)
size = r.convertToPainterUnits(10, QgsUnitTypes.RenderMetersInMapUnits,
c)
self.assertAlmostEqual(size, 41.66666, places=3)
# sizes should be clamped to reasonable range -- we don't want to treat 2000m map unit sizes as 10 million pixels!
size = r.convertToPainterUnits(2000, QgsUnitTypes.RenderMapUnits, c)
self.assertEqual(size, 100.0)
size = r.convertToPainterUnits(2000,
QgsUnitTypes.RenderMetersInMapUnits, c)
self.assertEqual(size, 100.0)
size = r.convertToPainterUnits(0.0002, QgsUnitTypes.RenderMapUnits, c)
self.assertEqual(size, 10.0)
size = r.convertToPainterUnits(0.0002,
QgsUnitTypes.RenderMetersInMapUnits, c)
self.assertEqual(size, 10.0)
# normal units, should not be affected
size = r.convertToPainterUnits(2, QgsUnitTypes.RenderMillimeters, c)
self.assertAlmostEqual(size, 23.622047, places=5)
size = r.convertToPainterUnits(2, QgsUnitTypes.RenderPoints, c)
self.assertAlmostEqual(size, 8.33333333125, places=5)
size = r.convertToPainterUnits(2, QgsUnitTypes.RenderInches, c)
self.assertAlmostEqual(size, 600.0, places=5)
size = r.convertToPainterUnits(2, QgsUnitTypes.RenderPixels, c)
self.assertAlmostEqual(size, 2.0, places=5)
# minimum size greater than the calculated size, so size should be limited to minSizeMM
c.minSizeMM = 5
c.minSizeMMEnabled = True
size = r.convertToPainterUnits(2, QgsUnitTypes.RenderMapUnits, c)
self.assertAlmostEqual(size, 59.0551181, places=5)
# maximum size less than the calculated size, so size should be limited to maxSizeMM
c.maxSizeMM = 6
c.maxSizeMMEnabled = True
size = r.convertToPainterUnits(26, QgsUnitTypes.RenderMapUnits, c)
self.assertAlmostEqual(size, 70.866, places=2)
