def updateQuads(self, v=None):
isValid = True
try:
c = map(float, [self.lineEdit_xmin.text(), self.lineEdit_ymin.text(), self.lineEdit_xmax.text(), self.lineEdit_ymax.text()])
except:
isValid = False
if isValid:
# create quad rubber bands
rect = QgsRectangle(c[0], c[1], c[2], c[3])
quadtree = QuadTree(self.dialog.iface.mapCanvas().extent())
quadtree.buildTreeByRect(rect, self.spinBox_Height.value())
self.dialog.createRubberBands(quadtree.quads(), rect.center())
self.dialog.setWindowState(self.windowState() & ~Qt.WindowMinimized | Qt.WindowActive)
else:
self.dialog.clearRubberBands()
def createQuadTree(extent, p):
"""
args:
p -- demProperties
"""
try:
cx, cy, w, h = map(float, [p["lineEdit_centerX"], p["lineEdit_centerY"], p["lineEdit_rectWidth"], p["lineEdit_rectHeight"]])
except ValueError:
return None
# normalize
c = extent.normalizePoint(cx, cy)
hw = 0.5 * w / extent.width()
hh = 0.5 * h / extent.height()
quadtree = QuadTree()
if not quadtree.buildTreeByRect(QgsRectangle(c.x() - hw, c.y() - hh, c.x() + hw, c.y() + hh), p["spinBox_Height"]):
return None
return quadtree
