class TMSTester(QMainWindow):
def __init__(self, width, height):
super(TMSTester, self).__init__(None)
self.setStyleSheet("background: transparent")
self.canvasSize = QRectF(QPointF(0, 0), QPointF(width, height))
self.view = QGraphicsView()
self.view.setTransformationAnchor(QGraphicsView.AnchorUnderMouse)
self.view.setDragMode(QGraphicsView.ScrollHandDrag)
self.scene = QGraphicsScene(0, 0, width, height, self.view)
self.view.setScene(self.scene)
self.centreCoordinate = QPointF(-32.2138204, 115.0387413)
self.zoom = 3
self.mapLayer = TMSLayer('CRUSE:World_Bathymetric_Heightmap',
self.canvasSize, self.centreCoordinate, 3)
self.mapLayerHandle = self.scene.addWidget(self.mapLayer)
self.setCentralWidget(self.view)
self.mapLayer.setFocus()
def mouseMoveEvent(self, event):
tcX = self.mapLayer.requiredTiles['left']
tcY = self.mapLayer.requiredTiles['top']
offsetX = self.mapLayer.canvasSize.width() / 2 - (
self.mapLayer.centrePoint.x() - tcX) * TILE_DIMENSION
offsetY = self.mapLayer.canvasSize.height() / 2 + (
self.mapLayer.centrePoint.y() - (tcY + 1)) * TILE_DIMENSION
xTile = tcX + ((event.pos().x() - offsetX) / 256)
yTile = (tcY + 1) - ((event.pos().y() - offsetY) / 256)
self.mapLayer.centreCoordinate = self.mapLayer.tileToGeographic(
xTile, yTile, self.mapLayer.tileZoomIndex)
print('{}'.format(self.mapLayer.centreCoordinate))
def mousePressEvent(self, event):
tcX = self.mapLayer.requiredTiles['left']
tcY = self.mapLayer.requiredTiles['top']
offsetX = self.mapLayer.canvasSize.width() / 2 - (
self.mapLayer.centrePoint.x() - tcX) * TILE_DIMENSION
offsetY = self.mapLayer.canvasSize.height() / 2 + (
self.mapLayer.centrePoint.y() - (tcY + 1)) * TILE_DIMENSION
xTile = tcX + ((event.pos().x() - offsetX) / 256)
yTile = (tcY + 1) - ((event.pos().y() - offsetY) / 256)
centreCoordinate = self.mapLayer.tileToGeographic(
xTile, yTile, self.mapLayer.tileZoomIndex)
self.mapLayer.updateCentre(centreCoordinate)
def wheelEvent(self, event):
'''
Only used for zooming.
'''
self.view.setTransformationAnchor(QGraphicsView.AnchorUnderMouse)
self.view.viewport().installEventFilter(self)
if event.delta() > 0:
self.zoom *= 1 + (event.delta() / 120) * 0.1
scale = 1 + (self.zoom % self.mapLayer.tileZoomIndex)
else:
self.zoom *= (1 + (event.delta() / 120) * 0.1)
scale = 1 / (1 + (self.zoom % self.mapLayer.tileZoomIndex))
rasterZoom = self.mapLayer.tileZoomIndex + 2**(
floor(log(self.zoom, 2)) + 0) - 1
if scale <= 2:
self.view.scale(scale, scale)
else:
self.view.scale(1 / scale, 1 / scale)
self.mapLayer.updateZoom(rasterZoom)
print('zoom:{} scale:{} raster:{}'.format(self.zoom, scale,
rasterZoom))
def eventFilter(self, qobject, event):
if (event.type() == QEvent.Wheel):
return True
else:
return False
def keyPressEvent(self, event):
if event.key() == Qt.Key_Left:
self.centreCoordinate = QPointF(
self.mapLayer.centreCoordinate.x(),
self.mapLayer.centreCoordinate.y() -
self.mapLayer.tileZoomIndex)
self.mapLayer.updateCentre(self.centreCoordinate)
if event.key() == Qt.Key_Right:
self.centreCoordinate = QPointF(
self.mapLayer.centreCoordinate.x(),
self.mapLayer.centreCoordinate.y() +
self.mapLayer.tileZoomIndex)
self.mapLayer.updateCentre(self.centreCoordinate)
if event.key() == Qt.Key_Up:
self.centreCoordinate = QPointF(
self.mapLayer.centreCoordinate.x() +
self.mapLayer.tileZoomIndex,
self.mapLayer.centreCoordinate.y())
self.mapLayer.updateCentre(self.centreCoordinate)
if event.key() == Qt.Key_Down:
self.centreCoordinate = QPointF(
self.mapLayer.centreCoordinate.x() -
self.mapLayer.tileZoomIndex,
self.mapLayer.centreCoordinate.y())
self.mapLayer.updateCentre(self.centreCoordinate)
if event.key() == Qt.Key_Z:
self.zoom *= 1.3
self.mapLayer.updateZoom(self.zoom)
if event.key() == Qt.Key_X:
self.zoom /= 1.3
self.mapLayer.updateZoom(self.zoom)
if event.key() == Qt.Key_P:
self.centreCoordinate = QPointF(-32.2138204, 115.0387413)
self.mapLayer.updateCentre(self.centreCoordinate)
if event.key() == Qt.Key_A:
self.centreCoordinate = QPointF(-35.09138204, 138.07387413)
self.mapLayer.updateCentre(self.centreCoordinate)
if event.key() == Qt.Key_M:
self.centreCoordinate = QPointF(0, 0)
self.mapLayer.updateCentre(self.centreCoordinate)
self.mapLayer.updateCanvasSize(self.canvasSize)
