我正在制作一个显示区域地图的应用程序，并且我正在尝试在其上绘制可以表示信息的节点。
我完成了所有工作，但只是通过制作一个我展示的自定义小部件并在每次信息更改时一次又一次地打印所有内容来做到这一点。此外，我无法将节点“连接”到侦听器，因为它们只是原始小部件中的图像。
这让我想改造我的 GUI，现在我正试图让每个类都成为自定义小部件！但是有一个问题，我的 MapNode 不再显示了。
我搜索了stackoverflow，发现了这个有用的线程： How to set absolute position of the widgets in qt
所以我必须给我的mapnodes一个父节点，而父节点=正在显示的小部件（？）
无论如何，这是我的尝试，在这里粘贴相关代码。提示可能出现严重错误的地方：所有的 inits
app = QtGui.QApplication(list())
mutexbranch = Lock()
mutexnode = Lock()
def exec():
return app.exec_()
#Singleton Pattern: wanneer en object aan iets moet kunnen
# waar het inherent door de structuur niet aankon
# wordt dit via dit singleton opgelost
class GuiInternalCommunication:
realmap = 0
class MapView(QtGui.QWidget, listener.Listener):
def __init__(self, mapimagepath):
QtGui.QMainWindow.__init__(self)
listener.Listener.__init__(self)
self.map = Map(self, mapimagepath)
#self.setCentralWidget(self.map)
self.initUI()
def initUI(self):
self.setWindowTitle('Population mapping')
hbox = QtGui.QHBoxLayout()
hbox.addWidget(self.map)
self.setLayout(hbox)
resolution = QtGui.QDesktopWidget().screenGeometry()
self.setGeometry(20,20,550,800)
self.show()
######################################################################
class Map(QtGui.QWidget):
def __init__(self, parent, mapimagepath):
QtGui.QWidget.__init__(self, parent)
#self.timer = QtCore.QBasicTimer()
#coordinaten hoeken NE en SW voor kaart in map graphics van SKO
self.realmap = RealMap(
mapimagepath,
(51.0442, 3.7268),
(51.0405, 3.7242),
550,
800)
GuiInternalCommunication.realmap = self.realmap
self.needsupdate = True
self.timelabel = 0
parent.setGeometry(0,0,self.realmap.width, self.realmap.height)
self.mapNodes = {}
self.mapBranches = {}
def paintEvent(self, event):
painter = QtGui.QPainter()
painter.begin(self)
rect = self.contentsRect()
#teken achtergrond
self.realmap.drawRealMap(painter)
#teken branches
mutexbranch.acquire()
try:
for branch, mapBranch in self.mapBranches.items():
mapBranch.drawMapBranch(painter)
finally:
mutexbranch.release()
######################################################################
class RealMap(QtGui.QWidget):
def __init__(self, path, coordRightTop, coordLeftBot, width, height, pixpermet = 2.6):
super(RealMap, self).__init__()
self.path = path
self.mapimage = QtGui.QImage(self.path)
self.coordLeftBot = coordLeftBot
self.coordRightTop = coordRightTop
self.width = width
self.height = height
self.realdim = self.calcRealDim()
self.pixpermet = pixpermet
def paintEvent(self, e):
painter = QtGui.QPainter()
painter.begin(self)
self.drawRealMap(self, painter)
painter.end()
def drawRealMap(self, painter):
painter.drawImage(0,0,self.mapimage)
######################################################################
class MapNode(QtGui.QWidget):
dangertocolor = {"normal":"graphics//gradients//green.png",
"elevated":"graphics//gradients//orange.png",
"danger":"graphics//gradients//red.png"}
gradimage = {"normal":QtGui.QImage(dangertocolor["normal"]),
"elevated":QtGui.QImage(dangertocolor["elevated"]),
"danger":QtGui.QImage(dangertocolor["danger"])}
btimage = QtGui.QImage("graphics//BT-icon.png")
def __init__(self, scanner, x, y, danger = 0, parent = None):
# MapNode erft over van QWidget
super(MapNode, self).__init__()
QtGui.QWidget.__init__(self, parent)
self.scanner = scanner
self.x = x
self.y = y
self.danger = 'normal'
self.calcDanger(danger)
self.grads = {}
self.grad = QtGui.QImage(MapNode.dangertocolor[self.danger])
def paintEvent(self, e):
painter = QtGui.QPainter()
painter.begin(self)
self.drawMapNode(painter)
painter.end()
def drawMapNode(self, painter):
realmap = GuiInternalCommunication.realmap
radiusm = self.scanner.range
radiusp = radiusm*realmap.pixpermet
factor = radiusp/200 # basis grootte gradiënten is 200 pixels.
grad = MapNode.gradimage[self.danger]
grad = grad.scaled(grad.size().width()*factor, grad.size().height()*factor)
painter.drawImage(self.x-100*factor,self.y-100*factor, grad)
painter.drawImage(self.x-10, self.y-10,MapNode.btimage)
painter.drawText(self.x-15, self.y+20, str(self.scanner.sensorid) + '-' + str(self.scanner.name))
######################################################################
class MapBranch:
branchpens = {"normal": QtGui.QPen(QtCore.Qt.green, 3, QtCore.Qt.DashLine),
"elevated": QtGui.QPen(QtGui.QColor(255, 51, 0), 3, QtCore.Qt.DashLine), #mandarine orange hex is 255-165-0
"danger": QtGui.QPen(QtCore.Qt.red, 3, QtCore.Qt.DashLine)}
def __init__(self, branch, mapnode1, mapnode2, danger = 0):
self.mapnode1 = mapnode1
self.mapnode2 = mapnode2
self.branch = branch
self.danger = danger
self.calcDanger(danger)
def drawMapBranch(self, painter):
painter.setPen(MapBranch.branchpens[self.danger])
painter.drawLine(self.mapnode1.x,
self.mapnode1.y,
self.mapnode2.x,
self.mapnode2.y)
编辑 - 我忘了添加添加节点的代码。因此，在需要创建节点的事件发生后，此方法会触发创建节点：
def addNode(self, scanner):
mutexnode.acquire()
try:
coord = self.realmap.convertLatLon2Pix((scanner.latitude, scanner.longitude))
self.mapNodes[scanner.sensorid] = MapNode(scanner, coord[0], coord[1], parent = self)
self.mapNodes[scanner.sensorid].move(coord[0],coord[1])
#self.mapNodes[scanner.sensorid].show()
finally:
mutexnode.release()