class GtoWidgetScale(QWidget):
def __init__(self, gtomain, parent=None):
super(GtoWidgetScale, self).__init__(parent)
# QWidgetAction.__init__(self,parent)
self.iface = gtomain.iface
self.info = gtomain.info
self.debug = gtomain.debug
self.block = False
try:
self.canvas = self.iface.mapCanvas()
# ui
lay = QHBoxLayout(self)
# -----
self.lblLayer = QLabel("Maßstab:")
lay.addWidget(self.lblLayer)
self.wid = QgsScaleWidget(self)
self.wid.setMinimumWidth(120)
lay.addWidget(self.wid)
# -----
self.setLayout(lay)
# signals
self.canvas.scaleChanged.connect(self.scale_changed)
self.wid.scaleChanged.connect(self.set_mapscale)
# start
self.scale_changed(self.canvas.scale())
except Exception as e:
self.info.err(e)
def scale_changed(self, scale):
try:
# if self.debug: self.info.log("scale_changed", scale)
# self.blockSignals(True)
if not self.block:
self.block = True
self.wid.setScale(round(scale, 0))
self.block = False
# self.blockSignals(False)
except Exception as e:
self.info.err(e)
def set_mapscale(self, scale):
try:
# if self.debug: self.info.log("set_mapscale", scale)
# self.blockSignals(True)
if not self.block:
self.block = True
self.canvas.zoomScale(scale)
self.block = False
# self.blockSignals(False)
except Exception as e:
self.info.err(e)
def testNull(self):
w = QgsScaleWidget()
w.setScale(50)
self.assertFalse(w.allowNull())
w.setNull() # no effect
self.assertEqual(w.scale(), 50.0)
self.assertFalse(w.isNull())
spy = QSignalSpy(w.scaleChanged)
w.setAllowNull(True)
self.assertTrue(w.allowNull())
w.setScaleString('')
self.assertEqual(len(spy), 1)
self.assertTrue(math.isnan(w.scale()))
self.assertTrue(math.isnan(spy[-1][0]))
self.assertTrue(w.isNull())
w.setScaleString(" ")
self.assertTrue(math.isnan(w.scale()))
self.assertTrue(w.isNull())
w.setScaleString('0.02')
self.assertEqual(w.scale(), 50.0)
self.assertEqual(len(spy), 2)
self.assertEqual(spy[-1][0], 50.0)
self.assertFalse(w.isNull())
w.setScaleString('')
self.assertTrue(math.isnan(w.scale()))
self.assertEqual(len(spy), 3)
self.assertTrue(math.isnan(spy[-1][0]))
self.assertTrue(w.isNull())
w.setScaleString('0.02')
self.assertEqual(w.scale(), 50.0)
self.assertEqual(len(spy), 4)
self.assertEqual(spy[-1][0], 50.0)
self.assertFalse(w.isNull())
w.setNull()
self.assertTrue(math.isnan(w.scale()))
self.assertEqual(len(spy), 5)
self.assertTrue(math.isnan(spy[-1][0]))
self.assertTrue(w.isNull())
w.setAllowNull(False)
self.assertFalse(w.allowNull())
def testNull(self):
w = QgsScaleWidget()
w.setScale(50)
self.assertFalse(w.allowNull())
w.setNull() # no effect
self.assertEqual(w.scale(), 50.0)
self.assertFalse(w.isNull())
spy = QSignalSpy(w.scaleChanged)
w.setAllowNull(True)
self.assertTrue(w.allowNull())
w.setScaleString('')
self.assertEqual(len(spy), 1)
self.assertTrue(math.isnan(w.scale()))
self.assertTrue(math.isnan(spy[-1][0]))
self.assertTrue(w.isNull())
w.setScaleString(" ")
self.assertTrue(math.isnan(w.scale()))
self.assertTrue(w.isNull())
w.setScaleString('0.02')
self.assertEqual(w.scale(), 50.0)
self.assertEqual(len(spy), 2)
self.assertEqual(spy[-1][0], 50.0)
self.assertFalse(w.isNull())
w.setScaleString('')
self.assertTrue(math.isnan(w.scale()))
self.assertEqual(len(spy), 3)
self.assertTrue(math.isnan(spy[-1][0]))
self.assertTrue(w.isNull())
w.setScaleString('0.02')
self.assertEqual(w.scale(), 50.0)
self.assertEqual(len(spy), 4)
self.assertEqual(spy[-1][0], 50.0)
self.assertFalse(w.isNull())
w.setNull()
self.assertTrue(math.isnan(w.scale()))
self.assertEqual(len(spy), 5)
self.assertTrue(math.isnan(spy[-1][0]))
self.assertTrue(w.isNull())
w.setAllowNull(False)
self.assertFalse(w.allowNull())
