Python QgsMapRendererCache.hasCacheImage方法代码示例

# 需要导入模块: from qgis.core import QgsMapRendererCache [as 别名]
# 或者: from qgis.core.QgsMapRendererCache import hasCacheImage [as 别名]
    def testInit(self):
        cache = QgsMapRendererCache()
        extent = QgsRectangle(1, 2, 3, 4)
        self.assertFalse(cache.init(extent, 1000))

        # add a cache image
        im = QImage(200, 200, QImage.Format_RGB32)
        cache.setCacheImage('layer', im)
        self.assertFalse(cache.cacheImage('layer').isNull())
        self.assertTrue(cache.hasCacheImage('layer'))

        # re init, without changing extent or scale
        self.assertTrue(cache.init(extent, 1000))

        # image should still be in cache
        self.assertFalse(cache.cacheImage('layer').isNull())
        self.assertTrue(cache.hasCacheImage('layer'))

        # reinit with different scale
        self.assertFalse(cache.init(extent, 2000))
        # cache should be cleared
        self.assertTrue(cache.cacheImage('layer').isNull())
        self.assertFalse(cache.hasCacheImage('layer'))

        # readd image to cache
        cache.setCacheImage('layer', im)
        self.assertFalse(cache.cacheImage('layer').isNull())
        self.assertTrue(cache.hasCacheImage('layer'))

        # change extent
        self.assertFalse(cache.init(QgsRectangle(11, 12, 13, 14), 2000))
        # cache should be cleared
        self.assertTrue(cache.cacheImage('layer').isNull())
        self.assertFalse(cache.hasCacheImage('layer'))

# 需要导入模块: from qgis.core import QgsMapRendererCache [as 别名]
# 或者: from qgis.core.QgsMapRendererCache import hasCacheImage [as 别名]
    def testRequestRepaintSimple(self):
        """ test requesting repaint with a single dependent layer """
        layer = QgsVectorLayer("Point?field=fldtxt:string",
                               "layer", "memory")
        QgsProject.instance().addMapLayers([layer])
        self.assertTrue(layer.isValid())

        # add image to cache
        cache = QgsMapRendererCache()
        im = QImage(200, 200, QImage.Format_RGB32)
        cache.setCacheImage('xxx', im, [layer])
        self.assertFalse(cache.cacheImage('xxx').isNull())
        self.assertTrue(cache.hasCacheImage('xxx'))

        # trigger repaint on layer
        layer.triggerRepaint()
        # cache image should be cleared
        self.assertTrue(cache.cacheImage('xxx').isNull())
        self.assertFalse(cache.hasCacheImage('xxx'))
        QgsProject.instance().removeMapLayer(layer.id())

        # test that cache is also cleared on deferred update
        layer = QgsVectorLayer("Point?field=fldtxt:string",
                               "layer", "memory")
        cache.setCacheImage('xxx', im, [layer])
        layer.triggerRepaint(True)
        self.assertFalse(cache.hasCacheImage('xxx'))

# 需要导入模块: from qgis.core import QgsMapRendererCache [as 别名]
# 或者: from qgis.core.QgsMapRendererCache import hasCacheImage [as 别名]
    def testLayerRemoval(self):
        """test that cached image is cleared when a dependent layer is removed"""
        cache = QgsMapRendererCache()
        layer1 = QgsVectorLayer("Point?field=fldtxt:string",
                                "layer1", "memory")
        layer2 = QgsVectorLayer("Point?field=fldtxt:string",
                                "layer2", "memory")
        im = QImage(200, 200, QImage.Format_RGB32)
        cache.setCacheImage('depends', im, [layer1, layer2])
        cache.setCacheImage('depends2', im, [layer1])
        cache.setCacheImage('depends3', im, [layer2])
        cache.setCacheImage('no depends', im, [])
        self.assertTrue(cache.hasCacheImage('depends'))
        self.assertTrue(cache.hasCacheImage('depends2'))
        self.assertTrue(cache.hasCacheImage('depends3'))
        self.assertTrue(cache.hasCacheImage('no depends'))

        # try deleting a layer
        layer2 = None
        self.assertFalse(cache.hasCacheImage('depends'))
        self.assertTrue(cache.hasCacheImage('depends2'))
        self.assertFalse(cache.hasCacheImage('depends3'))
        self.assertTrue(cache.hasCacheImage('no depends'))

        layer1 = None
        self.assertFalse(cache.hasCacheImage('depends'))
        self.assertFalse(cache.hasCacheImage('depends2'))
        self.assertFalse(cache.hasCacheImage('depends3'))
        self.assertTrue(cache.hasCacheImage('no depends'))

# 需要导入模块: from qgis.core import QgsMapRendererCache [as 别名]
# 或者: from qgis.core.QgsMapRendererCache import hasCacheImage [as 别名]
    def checkAddingNewLabeledLayerInvalidatesLabelCache(self, job_type):
        """ adding a new labeled layer should invalidate any previous label caches"""
        layer = QgsVectorLayer("Point?field=fldtxt:string",
                               "layer1", "memory")

        layer.setCustomProperty("labeling", "pal")
        layer.setCustomProperty("labeling/enabled", True)
        layer.setCustomProperty("labeling/fieldName", "fldtxt")

        settings = QgsMapSettings()
        settings.setExtent(QgsRectangle(5, 25, 25, 45))
        settings.setOutputSize(QSize(600, 400))
        settings.setLayers([layer])

        # with cache - first run should populate cache
        cache = QgsMapRendererCache()
        job = job_type(settings)
        job.setCache(cache)
        job.start()
        job.waitForFinished()
        self.assertFalse(job.usedCachedLabels())
        self.assertTrue(cache.hasCacheImage('_labels_'))
        self.assertTrue(job.takeLabelingResults())

        self.assertEqual(cache.dependentLayers('_labels_'), [layer])

        # add another labeled layer
        layer2 = QgsVectorLayer("Point?field=fldtxt:string",
                                "layer2", "memory")
        layer2.setCustomProperty("labeling", "pal")
        layer2.setCustomProperty("labeling/enabled", True)
        layer2.setCustomProperty("labeling/fieldName", "fldtxt")
        settings.setLayers([layer, layer2])

        # second job should not be able to use label cache, since a new layer was added
        job = job_type(settings)
        job.setCache(cache)
        job.start()
        job.waitForFinished()
        # shouldn't use cache
        self.assertFalse(job.usedCachedLabels())
        # but results should have been cached
        self.assertTrue(cache.hasCacheImage('_labels_'))
        self.assertEqual(set(cache.dependentLayers('_labels_')), {layer, layer2})
        self.assertTrue(job.takeLabelingResults())

# 需要导入模块: from qgis.core import QgsMapRendererCache [as 别名]
# 或者: from qgis.core.QgsMapRendererCache import hasCacheImage [as 别名]
    def testClearOnLayerAutoRefresh(self):
        """ test that cache is cleared when layer auto refresh is triggered """
        cache = QgsMapRendererCache()
        layer1 = QgsVectorLayer("Point?field=fldtxt:string",
                                "layer1", "memory")
        im = QImage(200, 200, QImage.Format_RGB32)
        cache.setCacheImage('l1', im, [layer1])
        self.assertTrue(cache.hasCacheImage('l1'))

        layer1.setAutoRefreshInterval(100)
        layer1.setAutoRefreshEnabled(True)
        self.assertTrue(cache.hasCacheImage('l1'))

        # wait a second...
        sleep(1)
        QCoreApplication.processEvents()
        # cache should be cleared
        self.assertFalse(cache.hasCacheImage('l1'))

# 需要导入模块: from qgis.core import QgsMapRendererCache [as 别名]
# 或者: from qgis.core.QgsMapRendererCache import hasCacheImage [as 别名]
    def checkRemovingNonLabeledLayerKeepsLabelCache(self, job_type):
        """ removing a previously used non-labeled layer should keep any previous label caches"""
        layer = QgsVectorLayer("Point?field=fldtxt:string",
                               "layer1", "memory")

        layer.setCustomProperty("labeling", "pal")
        layer.setCustomProperty("labeling/enabled", True)
        layer.setCustomProperty("labeling/fieldName", "fldtxt")

        layer2 = QgsVectorLayer("Point?field=fldtxt:string",
                                "layer2", "memory")

        settings = QgsMapSettings()
        settings.setExtent(QgsRectangle(5, 25, 25, 45))
        settings.setOutputSize(QSize(600, 400))
        settings.setLayers([layer, layer2])

        # with cache - first run should populate cache
        cache = QgsMapRendererCache()
        job = job_type(settings)
        job.setCache(cache)
        job.start()
        job.waitForFinished()
        self.assertFalse(job.usedCachedLabels())
        self.assertTrue(cache.hasCacheImage('_labels_'))
        self.assertTrue(job.takeLabelingResults())

        self.assertEqual(set(cache.dependentLayers('_labels_')), {layer})

        # remove a previously labeled layer
        settings.setLayers([layer])

        # second job should be able to use label cache, since only a non-labeled layer was removed
        job = job_type(settings)
        job.setCache(cache)
        job.start()
        job.waitForFinished()
        # should use cache
        self.assertTrue(job.usedCachedLabels())
        # results should have been cached
        self.assertTrue(cache.hasCacheImage('_labels_'))
        self.assertEqual(set(cache.dependentLayers('_labels_')), {layer})
        self.assertTrue(job.takeLabelingResults())

# 需要导入模块: from qgis.core import QgsMapRendererCache [as 别名]
# 或者: from qgis.core.QgsMapRendererCache import hasCacheImage [as 别名]
    def checkLabeledLayerWithBlendModesCannotBeCached(self, job_type):
        """ any labeled layer utilising blending modes cannot be cached"""
        layer = QgsVectorLayer("Point?field=fldtxt:string",
                               "layer1", "memory")

        layer.setCustomProperty("labeling", "pal")
        layer.setCustomProperty("labeling/enabled", True)
        layer.setCustomProperty("labeling/fieldName", "fldtxt")

        layer2 = QgsVectorLayer("Point?field=fldtxt:string",
                                "layer2", "memory")
        layer2.setCustomProperty("labeling", "pal")
        layer2.setCustomProperty("labeling/enabled", True)
        layer2.setCustomProperty("labeling/fieldName", "fldtxt")
        layer2.setCustomProperty("labeling/blendMode", 5)

        settings = QgsMapSettings()
        settings.setExtent(QgsRectangle(5, 25, 25, 45))
        settings.setOutputSize(QSize(600, 400))
        settings.setLayers([layer, layer2])

        # with cache - cache should not be populated!
        cache = QgsMapRendererCache()
        job = job_type(settings)
        job.setCache(cache)
        job.start()
        job.waitForFinished()
        self.assertFalse(job.usedCachedLabels())
        self.assertFalse(cache.hasCacheImage('_labels_'))
        self.assertTrue(job.takeLabelingResults())

        # second job should also not be able to use label cache
        job = job_type(settings)
        job.setCache(cache)
        job.start()
        job.waitForFinished()
        # shouldn't use cache
        self.assertFalse(job.usedCachedLabels())
        # and results should not have been cached
        self.assertFalse(cache.hasCacheImage('_labels_'))
        self.assertTrue(job.takeLabelingResults())

# 需要导入模块: from qgis.core import QgsMapRendererCache [as 别名]
# 或者: from qgis.core.QgsMapRendererCache import hasCacheImage [as 别名]
    def testSetCacheImages(self):
        cache = QgsMapRendererCache()
        # not set image
        im = cache.cacheImage('littlehands')
        self.assertTrue(im.isNull())
        self.assertFalse(cache.hasCacheImage('littlehands'))

        # set image
        im = QImage(200, 200, QImage.Format_RGB32)
        cache.setCacheImage('littlehands', im)
        self.assertFalse(im.isNull())
        self.assertEqual(cache.cacheImage('littlehands'), im)
        self.assertTrue(cache.hasCacheImage('littlehands'))

        # test another not set image when cache has images
        self.assertTrue(cache.cacheImage('bad').isNull())
        self.assertFalse(cache.hasCacheImage('bad'))

        # clear cache image
        cache.clearCacheImage('not in cache')  # no crash!
        cache.clearCacheImage('littlehands')
        im = cache.cacheImage('littlehands')
        self.assertTrue(im.isNull())
        self.assertFalse(cache.hasCacheImage('littlehands'))

        # clear whole cache
        im = QImage(200, 200, QImage.Format_RGB32)
        cache.setCacheImage('littlehands', im)
        self.assertFalse(im.isNull())
        self.assertTrue(cache.hasCacheImage('littlehands'))
        cache.clear()
        im = cache.cacheImage('littlehands')
        self.assertTrue(im.isNull())
        self.assertFalse(cache.hasCacheImage('littlehands'))

# 需要导入模块: from qgis.core import QgsMapRendererCache [as 别名]
# 或者: from qgis.core.QgsMapRendererCache import hasCacheImage [as 别名]
    def testRequestRepaintMultiple(self):
        """ test requesting repaint with multiple dependent layers """
        layer1 = QgsVectorLayer("Point?field=fldtxt:string",
                                "layer1", "memory")
        layer2 = QgsVectorLayer("Point?field=fldtxt:string",
                                "layer2", "memory")
        QgsProject.instance().addMapLayers([layer1, layer2])
        self.assertTrue(layer1.isValid())
        self.assertTrue(layer2.isValid())

        # add image to cache - no dependent layers
        cache = QgsMapRendererCache()
        im1 = QImage(200, 200, QImage.Format_RGB32)
        cache.setCacheImage('nolayer', im1)
        self.assertFalse(cache.cacheImage('nolayer').isNull())
        self.assertTrue(cache.hasCacheImage('nolayer'))

        # trigger repaint on layer
        layer1.triggerRepaint()
        layer1.triggerRepaint()  # do this a couple of times - we don't want errors due to multiple disconnects, etc
        layer2.triggerRepaint()
        layer2.triggerRepaint()
        # cache image should still exist - it's not dependent on layers
        self.assertFalse(cache.cacheImage('nolayer').isNull())
        self.assertTrue(cache.hasCacheImage('nolayer'))

        # image depends on 1 layer
        im_l1 = QImage(200, 200, QImage.Format_RGB32)
        cache.setCacheImage('im1', im_l1, [layer1])

        # image depends on 2 layers
        im_l1_l2 = QImage(200, 200, QImage.Format_RGB32)
        cache.setCacheImage('im1_im2', im_l1_l2, [layer1, layer2])

        # image depends on 2nd layer alone
        im_l2 = QImage(200, 200, QImage.Format_RGB32)
        cache.setCacheImage('im2', im_l2, [layer2])

        self.assertFalse(cache.cacheImage('im1').isNull())
        self.assertTrue(cache.hasCacheImage('im1'))
        self.assertFalse(cache.cacheImage('im1_im2').isNull())
        self.assertTrue(cache.hasCacheImage('im1_im2'))
        self.assertFalse(cache.cacheImage('im2').isNull())
        self.assertTrue(cache.hasCacheImage('im2'))

        # trigger repaint layer 1 (check twice - don't want disconnect errors)
        for i in range(2):
            layer1.triggerRepaint()
            # should be cleared
            self.assertTrue(cache.cacheImage('im1').isNull())
            self.assertFalse(cache.hasCacheImage('im1'))
            self.assertTrue(cache.cacheImage('im1_im2').isNull())
            self.assertFalse(cache.hasCacheImage('im1_im2'))
            # should be retained
            self.assertTrue(cache.hasCacheImage('im2'))
            self.assertFalse(cache.cacheImage('im2').isNull())
            self.assertEqual(cache.cacheImage('im2'), im_l2)
            self.assertTrue(cache.hasCacheImage('nolayer'))
            self.assertFalse(cache.cacheImage('nolayer').isNull())
            self.assertEqual(cache.cacheImage('nolayer'), im1)

        # trigger repaint layer 2
        for i in range(2):
            layer2.triggerRepaint()
            # should be cleared
            self.assertFalse(cache.hasCacheImage('im1'))
            self.assertTrue(cache.cacheImage('im1').isNull())
            self.assertFalse(cache.hasCacheImage('im1_im2'))
            self.assertTrue(cache.cacheImage('im1_im2').isNull())
            self.assertFalse(cache.hasCacheImage('im2'))
            self.assertTrue(cache.cacheImage('im2').isNull())
            # should be retained
            self.assertTrue(cache.hasCacheImage('nolayer'))
            self.assertFalse(cache.cacheImage('nolayer').isNull())
            self.assertEqual(cache.cacheImage('nolayer'), im1)