Python QgsLayoutItemMap.refresh方法代码示例

# 需要导入模块: from qgis.core import QgsLayoutItemMap [as 别名]
# 或者: from qgis.core.QgsLayoutItemMap import refresh [as 别名]
    def testContainsAdvancedEffectsAndRasterization(self):
        layout = QgsLayout(QgsProject.instance())
        item = QgsLayoutItemLabel(layout)

        self.assertFalse(item.containsAdvancedEffects())

        # item opacity requires that the individual item be flattened to a raster item
        item.setItemOpacity(0.5)
        self.assertTrue(item.containsAdvancedEffects())
        # but not the WHOLE layout
        self.assertFalse(item.requiresRasterization())
        item.dataDefinedProperties().setProperty(QgsLayoutObject.Opacity, QgsProperty.fromExpression('100'))
        item.refresh()
        self.assertFalse(item.containsAdvancedEffects())
        self.assertFalse(item.requiresRasterization())
        item.dataDefinedProperties().setProperty(QgsLayoutObject.Opacity, QgsProperty())
        item.refresh()
        self.assertTrue(item.containsAdvancedEffects())
        self.assertFalse(item.requiresRasterization())
        item.setItemOpacity(1.0)
        self.assertFalse(item.containsAdvancedEffects())
        self.assertFalse(item.requiresRasterization())

        # item blend mode is NOT an advanced effect -- rather it requires that the WHOLE layout be rasterized to achieve
        item.setBlendMode(QPainter.CompositionMode_DestinationAtop)
        self.assertFalse(item.containsAdvancedEffects())
        self.assertTrue(item.requiresRasterization())

        map = QgsLayoutItemMap(layout)
        # map items are different -- because they override paint, they don't get the auto-flattening and rasterization
        map.setItemOpacity(0.5)
        self.assertFalse(map.containsAdvancedEffects())
        # rather, a map with opacity requires the WHOLE layout to be rasterized
        self.assertTrue(map.requiresRasterization())
        map.dataDefinedProperties().setProperty(QgsLayoutObject.Opacity, QgsProperty.fromExpression('100'))
        map.refresh()
        self.assertFalse(map.containsAdvancedEffects())
        self.assertTrue(map.requiresRasterization())

# 需要导入模块: from qgis.core import QgsLayoutItemMap [as 别名]
# 或者: from qgis.core.QgsLayoutItemMap import refresh [as 别名]
    def testLabelMargin(self):
        """
        Test rendering map item with a label margin set
        """
        format = QgsTextFormat()
        format.setFont(QgsFontUtils.getStandardTestFont("Bold"))
        format.setSize(20)
        format.setNamedStyle("Bold")
        format.setColor(QColor(0, 0, 0))
        settings = QgsPalLayerSettings()
        settings.setFormat(format)
        settings.fieldName = "'X'"
        settings.isExpression = True
        settings.placement = QgsPalLayerSettings.OverPoint

        vl = QgsVectorLayer("Point?crs=epsg:4326&field=id:integer", "vl", "memory")
        vl.setRenderer(QgsNullSymbolRenderer())
        f = QgsFeature(vl.fields(), 1)
        for x in range(15):
            for y in range(15):
                f.setGeometry(QgsPoint(x, y))
                vl.dataProvider().addFeature(f)

        vl.setLabeling(QgsVectorLayerSimpleLabeling(settings))
        vl.setLabelsEnabled(True)

        p = QgsProject()

        engine_settings = QgsLabelingEngineSettings()
        engine_settings.setFlag(QgsLabelingEngineSettings.UsePartialCandidates, False)
        engine_settings.setFlag(QgsLabelingEngineSettings.DrawLabelRectOnly, True)
        p.setLabelingEngineSettings(engine_settings)

        p.addMapLayer(vl)
        layout = QgsLayout(p)
        layout.initializeDefaults()
        p.setCrs(QgsCoordinateReferenceSystem('EPSG:4326'))
        map = QgsLayoutItemMap(layout)
        map.attemptSetSceneRect(QRectF(10, 10, 180, 180))
        map.setFrameEnabled(True)
        map.zoomToExtent(vl.extent())
        map.setLayers([vl])
        layout.addLayoutItem(map)

        checker = QgsLayoutChecker('composermap_label_nomargin', layout)
        checker.setControlPathPrefix("composer_map")
        result, message = checker.testLayout()
        self.report += checker.report()
        self.assertTrue(result, message)

        map.setLabelMargin(QgsLayoutMeasurement(15, QgsUnitTypes.LayoutMillimeters))
        checker = QgsLayoutChecker('composermap_label_margin', layout)
        checker.setControlPathPrefix("composer_map")
        result, message = checker.testLayout()
        self.report += checker.report()
        self.assertTrue(result, message)

        map.setLabelMargin(QgsLayoutMeasurement(3, QgsUnitTypes.LayoutCentimeters))
        checker = QgsLayoutChecker('composermap_label_cm_margin', layout)
        checker.setControlPathPrefix("composer_map")
        result, message = checker.testLayout()
        self.report += checker.report()
        self.assertTrue(result, message)

        map.setMapRotation(45)
        map.zoomToExtent(vl.extent())
        map.setScale(map.scale() * 1.2)
        checker = QgsLayoutChecker('composermap_rotated_label_margin', layout)
        checker.setControlPathPrefix("composer_map")
        result, message = checker.testLayout()
        self.report += checker.report()
        self.assertTrue(result, message)

        # data defined
        map.setMapRotation(0)
        map.zoomToExtent(vl.extent())
        map.dataDefinedProperties().setProperty(QgsLayoutObject.MapLabelMargin, QgsProperty.fromExpression('1+3'))
        map.refresh()
        checker = QgsLayoutChecker('composermap_dd_label_margin', layout)
        checker.setControlPathPrefix("composer_map")
        result, message = checker.testLayout()
        self.report += checker.report()
        self.assertTrue(result, message)