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More QgsMapUnitScale tests
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nyalldawson committed Sep 17, 2015
1 parent 558611b commit b693020
Showing 1 changed file with 105 additions and 1 deletion.
106 changes: 105 additions & 1 deletion tests/src/python/test_qgsmapunitscale.py
Original file line number Diff line number Diff line change
Expand Up @@ -14,7 +14,7 @@

import qgis

from qgis.core import (QgsMapUnitScale, QgsRenderContext, QgsMapSettings, QgsRectangle)
from qgis.core import (QgsMapUnitScale, QgsRenderContext, QgsSymbolLayerV2Utils, QgsSymbolV2, QgsMapSettings, QgsRectangle)
from PyQt4.QtCore import QSize
from utilities import (TestCase, unittest)

Expand Down Expand Up @@ -97,5 +97,109 @@ def testMapUnitsPerPixel(self):
mup = c.computeMapUnitsPerPixel(r)
self.assertAlmostEqual(mup, 2.0, places=5)

def testLineWidthScaleFactor(self):
#test QgsSymbolLayerV2Utils::lineWidthScaleFactor() using QgsMapUnitScale

ms = QgsMapSettings()
ms.setExtent(QgsRectangle(0, 0, 100, 100))
ms.setOutputSize(QSize(100, 50))
ms.setOutputDpi(300)
r = QgsRenderContext.fromMapSettings(ms)

#renderer scale should be about 1:291937841

#start with no min/max scale
c = QgsMapUnitScale()

sf = QgsSymbolLayerV2Utils.lineWidthScaleFactor(r, QgsSymbolV2.MapUnit, c)
self.assertAlmostEqual(sf, 0.5, places=5)
sf = QgsSymbolLayerV2Utils.lineWidthScaleFactor(r, QgsSymbolV2.MM, c)
self.assertAlmostEqual(sf, 11.8110236, places=5)
sf = QgsSymbolLayerV2Utils.lineWidthScaleFactor(r, QgsSymbolV2.Pixel, c)
self.assertAlmostEqual(sf, 1.0, places=5)

#minimum scale greater than the renderer scale, so should be limited to minScale
c.minScale = 1 / 150000000.0
sf = QgsSymbolLayerV2Utils.lineWidthScaleFactor(r, QgsSymbolV2.MapUnit, c)
self.assertAlmostEqual(sf, 3.89250455, places=5)
#only conversion from mapunits should be affected
sf = QgsSymbolLayerV2Utils.lineWidthScaleFactor(r, QgsSymbolV2.MM, c)
self.assertAlmostEqual(sf, 11.8110236, places=5)
sf = QgsSymbolLayerV2Utils.lineWidthScaleFactor(r, QgsSymbolV2.Pixel, c)
self.assertAlmostEqual(sf, 1.0, places=5)
c.minScale = 0

#maximum scale less than the renderer scale, so should be limited to maxScale
c.maxScale = 1 / 350000000.0
sf = QgsSymbolLayerV2Utils.lineWidthScaleFactor(r, QgsSymbolV2.MapUnit, c)
self.assertAlmostEqual(sf, 0.5, places=5)
#only conversion from mapunits should be affected
sf = QgsSymbolLayerV2Utils.lineWidthScaleFactor(r, QgsSymbolV2.MM, c)
self.assertAlmostEqual(sf, 11.8110236, places=5)
sf = QgsSymbolLayerV2Utils.lineWidthScaleFactor(r, QgsSymbolV2.Pixel, c)
self.assertAlmostEqual(sf, 1.0, places=5)

def testPixelSizeScaleFactor(self):
#test QgsSymbolLayerV2Utils::pixelSizeScaleFactor() using QgsMapUnitScale

ms = QgsMapSettings()
ms.setExtent(QgsRectangle(0, 0, 100, 100))
ms.setOutputSize(QSize(100, 50))
ms.setOutputDpi(300)
r = QgsRenderContext.fromMapSettings(ms)

#renderer scale should be about 1:291937841

#start with no min/max scale
c = QgsMapUnitScale()

sf = QgsSymbolLayerV2Utils.pixelSizeScaleFactor(r, QgsSymbolV2.MapUnit, c)
self.assertAlmostEqual(sf, 0.5, places=5)
sf = QgsSymbolLayerV2Utils.pixelSizeScaleFactor(r, QgsSymbolV2.MM, c)
self.assertAlmostEqual(sf, 11.8110236, places=5)
sf = QgsSymbolLayerV2Utils.pixelSizeScaleFactor(r, QgsSymbolV2.Pixel, c)
self.assertAlmostEqual(sf, 1.0, places=5)

#minimum scale greater than the renderer scale, so should be limited to minScale
c.minScale = 1 / 150000000.0
sf = QgsSymbolLayerV2Utils.pixelSizeScaleFactor(r, QgsSymbolV2.MapUnit, c)
self.assertAlmostEqual(sf, 3.8925045, places=5)
#only conversion from mapunits should be affected
sf = QgsSymbolLayerV2Utils.pixelSizeScaleFactor(r, QgsSymbolV2.MM, c)
self.assertAlmostEqual(sf, 11.811023, places=5)
sf = QgsSymbolLayerV2Utils.pixelSizeScaleFactor(r, QgsSymbolV2.Pixel, c)
self.assertAlmostEqual(sf, 1.0, places=5)
c.minScale = 0

#maximum scale less than the renderer scale, so should be limited to maxScale
c.maxScale = 1 / 350000000.0
sf = QgsSymbolLayerV2Utils.pixelSizeScaleFactor(r, QgsSymbolV2.MapUnit, c)
self.assertAlmostEqual(sf, 0.5, places=5)
#only conversion from mapunits should be affected
sf = QgsSymbolLayerV2Utils.pixelSizeScaleFactor(r, QgsSymbolV2.MM, c)
self.assertAlmostEqual(sf, 11.8110236, places=5)
sf = QgsSymbolLayerV2Utils.pixelSizeScaleFactor(r, QgsSymbolV2.Pixel, c)
self.assertAlmostEqual(sf, 1.0, places=5)

def testMapUnitScaleFactor(self):
#test QgsSymbolLayerV2Utils::mapUnitScaleFactor() using QgsMapUnitScale

ms = QgsMapSettings()
ms.setExtent(QgsRectangle(0, 0, 100, 100))
ms.setOutputSize(QSize(100, 50))
ms.setOutputDpi(300)
r = QgsRenderContext.fromMapSettings(ms)

#renderer scale should be about 1:291937841

c = QgsMapUnitScale()
sf = QgsSymbolLayerV2Utils.mapUnitScaleFactor(r, QgsSymbolV2.MapUnit, c)
self.assertAlmostEqual(sf, 1.0, places=5)
sf = QgsSymbolLayerV2Utils.mapUnitScaleFactor(r, QgsSymbolV2.MM, c)
self.assertAlmostEqual(sf, 23.622047, places=5)
sf = QgsSymbolLayerV2Utils.mapUnitScaleFactor(r, QgsSymbolV2.Pixel, c)
self.assertAlmostEqual(sf, 2.0, places=5)


if __name__ == '__main__':
unittest.main()

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