def _getBandItemActions(self, item=None, actionsgroup=None):
if actionsgroup is None:
actionsgroup = self._actionsmap['BandItem']
action = actionsgroup.findChild(QtWidgets.QAction,
'actionOpenImageView')
action.setEnabled(True)
if item is not None:
assert isinstance(item, modelitems.BandItem)
# @TODO: find a better solution
allowcomplex = True
if gdal.DataTypeIsComplex(item.DataType) and not allowcomplex:
action.setEnabled(False)
else:
# @TODO: remove this to allow multiple views on the same item
for subwin in self._app.mdiarea.subWindowList():
#if subwin.item == item:
# action.setEnabled(False)
# break
# @COMPATIBILITY: pyside 1.2.2
try:
if subwin.item == item:
action.setEnabled(False)
break
except NotImplementedError:
if id(subwin.item) == id(item):
action.setEnabled(False)
break
return actionsgroup
def _dataRange(band, data=None):
if band and gdalsupport.hasFastStats(band):
vmin, vmax, mean, stddev = gdalsupport.SafeGetStatistics(
band, True)
if None not in (vmin, vmax, mean, stddev):
if gdal.DataTypeIsComplex(band.DataType):
vmin, vmax = 0, vmax * np.sqrt(2)
return vmin, vmax
if data is not None and data.size <= 4 * 1024**2:
vmin, vmax, mean, stddev = safeDataStats(band)
if None not in (vmin, vmax, mean, stddev):
return data.min(), data.max()
if band:
tmap = {
gdal.GDT_Byte: (0, 255),
gdal.GDT_UInt16: (0, 2**16 - 1),
gdal.GDT_UInt32: (0, 2**32 - 1),
gdal.GDT_Int16: (-2**15, 2**15 - 1),
gdal.GDT_Int32: (-2**31, 2**31 - 1),
gdal.GDT_CInt16: (0, 2**15 * np.sqrt(2)),
gdal.GDT_CInt32: (0, 2**31 * np.sqrt(2)),
gdal.GDT_CFloat32: (0, None),
gdal.GDT_CFloat64: (0, None),
}
return tmap.get(band.DataType, (None, None))
return None, None
def has_complex_bands(dataset):
result = False
for band_id in range(1, dataset.RasterCount + 1):
band = dataset.GetRasterBand(band_id)
result = gdal.DataTypeIsComplex(band.DataType)
if result:
break
return result
def __init__(self, band, parent=None, scene=None, **kwargs):
super(GdalGraphicsItem, self).__init__(band, parent, scene, **kwargs)
if gdal.DataTypeIsComplex(band.DataType):
# @TODO: raise ItemTypeError or NotImplementedError
typename = gdal.GetDataTypeName(band.DataType)
raise NotImplementedError('support for "%s" data type not '
'avalable' % typename)
def __init__(self, band, parent=None, **kwargs):
super(GdalGraphicsItem, self).__init__(band, parent, **kwargs)
self.colortable = qtsupport.GRAY_COLORTABLE
if gdal.DataTypeIsComplex(band.DataType):
# @TODO: raise ItemTypeError or NotImplementedError
typename = gdal.GetDataTypeName(band.DataType)
raise NotImplementedError(
'support for "%s" data type not avalable' % typename)
def graphicsItemFactory(gdalobj, parent=None):
'''Factory function for GDAL graphics items.
Instantiates on object of the GDAL graphics item class taht best
fits the *gdalobj* passed as argument.
'''
if gdalsupport.isRGB(gdalobj):
_log.debug('new GdalRgbGraphicsItem')
return GdalRgbGraphicsItem(gdalobj, parent)
elif gdalobj.DataType in (gdal.GDT_Byte, gdal.GDT_UInt16):
_log.debug('new GdalUIntGraphicsItem')
return UIntGdalGraphicsItem(gdalobj, parent)
elif gdal.DataTypeIsComplex(gdalobj.DataType):
_log.debug('new GdalComplexGraphicsItem')
return GdalComplexGraphicsItem(gdalobj, parent)
else:
_log.debug('new GdalGraphicsItem')
return GdalGraphicsItem(gdalobj, parent)
