Python PyQt5.QtWidgets.QGraphicsPolygonItem() Examples

The following are 3 code examples for showing how to use PyQt5.QtWidgets.QGraphicsPolygonItem(). These examples are extracted from open source projects. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example.

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Example 1
Project: pyNMS   Author: afourmy   File: geographical_view.py    License: GNU General Public License v3.0 6 votes vote down vote up
def draw_polygons(self):
        sf = shapefile.Reader(self.shapefile)       
        polygons = sf.shapes() 
        for polygon in polygons:
            # convert shapefile geometries into shapely geometries
            # to extract the polygons of a multipolygon
            polygon = shapely.geometry.shape(polygon)
            # if it is a polygon, we use a list to make it iterable
            if polygon.geom_type == 'Polygon':
                polygon = [polygon]
            for land in polygon:
                qt_polygon = QtGui.QPolygonF() 
                longitudes, latitudes = land.exterior.coords.xy
                for lon, lat in zip(longitudes, latitudes):
                    px, py = self.to_canvas_coordinates(lon, lat)
                    if px > 1e+10:
                        continue
                    qt_polygon.append(QtCore.QPointF(px, py))
                polygon_item = QtWidgets.QGraphicsPolygonItem(qt_polygon)
                polygon_item.setBrush(self.land_brush)
                polygon_item.setPen(self.land_pen)
                polygon_item.setZValue(1)
                yield polygon_item 
Example 2
Project: openMotor   Author: reilleya   File: nozzlePreviewWidget.py    License: GNU General Public License v3.0 6 votes vote down vote up
def __init__(self):
        super().__init__()
        self.ui = Ui_NozzlePreview()
        self.ui.setupUi(self)

        self.brush = QBrush()
        self.brush.setStyle(1)
        self.scene = QGraphicsScene(self)
        self.upper = QGraphicsPolygonItem()
        self.lower = QGraphicsPolygonItem()
        self.upper.setBrush(self.brush)
        self.lower.setBrush(self.brush)
        self.scene.addItem(self.upper)
        self.scene.addItem(self.lower)
        self.ui.tabCrossSection.setScene(self.scene)

        self.ui.tabWidget.currentChanged.connect(self.rescale) 
Example 3
Project: PyQt   Author: PyQt5   File: WorldMap.py    License: GNU General Public License v3.0 5 votes vote down vote up
def initMap(self):
        features = json.load(
            open("Data/world.json", encoding="utf8")).get("features")
        for feature in features:
            geometry = feature.get("geometry")
            if not geometry:
                continue
            _type = geometry.get("type")
            coordinates = geometry.get("coordinates")
            for coordinate in coordinates:
                if _type == "Polygon":
                    polygon = QPolygonF(
                        [QPointF(latitude, -longitude) for latitude, longitude in coordinate])
                    item = QGraphicsPolygonItem(polygon)
                    item.setPen(QPen(self.borderColor, 0))
                    item.setBrush(QBrush(self.backgroundColor))
                    item.setPos(0, 0)
                    self._scene.addItem(item)
                elif _type == "MultiPolygon":
                    for _coordinate in coordinate:
                        polygon = QPolygonF(
                            [QPointF(latitude, -longitude) for latitude, longitude in _coordinate])
                        item = QGraphicsPolygonItem(polygon)
                        item.setPen(QPen(self.borderColor, 0))
                        item.setBrush(QBrush(self.backgroundColor))
                        item.setPos(0, 0)
                        self._scene.addItem(item)