def _getSymbolWidth(self, context, width, unit):
scale = 1.0
if unit == QgsSymbolV2.MapUnit:
scale = QgsSymbolLayerV2Utils.lineWidthScaleFactor(
context, QgsSymbolV2.MM) / QgsSymbolLayerV2Utils.lineWidthScaleFactor(context, QgsSymbolV2.MapUnit)
width = max(width + 2 * self._buffer * scale, self._minWidth * scale)
return width
def _getSymbolWidth(self, context, width, unit):
scale = 1.0
if unit == QgsSymbolV2.MapUnit:
scale = QgsSymbolLayerV2Utils.lineWidthScaleFactor(
context,
QgsSymbolV2.MM) / QgsSymbolLayerV2Utils.lineWidthScaleFactor(
context, QgsSymbolV2.MapUnit)
width = max(width + 2 * self._buffer * scale, self._minWidth * scale)
return width
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 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)
