pyqt

问题 I am having some issue with layout in pyqt. After closing the items from the layout still if layout.count() returns the old item count. So I think .close() not really removing items from the layout. Here is a full working example. import sys from PyQt4 import QtGui,QtCore class LayoutTest(QtGui.QWidget): def __init__(self): super(LayoutTest, self).__init__() self.vvbox = QtGui.QVBoxLayout() self.dvbox = QtGui.QVBoxLayout() vbox = QtGui.QVBoxLayout() vbox.addLayout(self.vvbox) vbox.addLayout

问题 I am having some issue with layout in pyqt. After closing the items from the layout still if layout.count() returns the old item count. So I think .close() not really removing items from the layout. Here is a full working example. import sys from PyQt4 import QtGui,QtCore class LayoutTest(QtGui.QWidget): def __init__(self): super(LayoutTest, self).__init__() self.vvbox = QtGui.QVBoxLayout() self.dvbox = QtGui.QVBoxLayout() vbox = QtGui.QVBoxLayout() vbox.addLayout(self.vvbox) vbox.addLayout

问题 I have a QGraphicsScene with QGraphicsItem added to it. Suppose I clicked on a map image ( QGraphicsItem ) where green circle is drawn. How to get click position in terms of this QGraphicsItem and not QGraphicsScene coordinate system. P.S. Please, don't write code with mouse event handling. Just how to map click position correctly. Thanks in advance. 回答1: The idea is to convert the coordinate with respect to the scene to a coordinate with respect to the item. - Override mousePressEvent in

问题 I have a QGraphicsScene with QGraphicsItem added to it. Suppose I clicked on a map image ( QGraphicsItem ) where green circle is drawn. How to get click position in terms of this QGraphicsItem and not QGraphicsScene coordinate system. P.S. Please, don't write code with mouse event handling. Just how to map click position correctly. Thanks in advance. 回答1: The idea is to convert the coordinate with respect to the scene to a coordinate with respect to the item. - Override mousePressEvent in

问题 I have a QGraphicsScene with QGraphicsItem added to it. Suppose I clicked on a map image ( QGraphicsItem ) where green circle is drawn. How to get click position in terms of this QGraphicsItem and not QGraphicsScene coordinate system. P.S. Please, don't write code with mouse event handling. Just how to map click position correctly. Thanks in advance. 回答1: The idea is to convert the coordinate with respect to the scene to a coordinate with respect to the item. - Override mousePressEvent in

问题 I am trying to get the (x,y) values of my random function plot whenever I move the moused on top of the graph. I am using pyqtgraph.SignalProxy and connect it to a callback mousedMoved. I am getting this as error: NameError: global name 'mouseMoved' is not defined Here is the code: import sys from pyqtgraph.Qt import QtGui, QtCore import numpy as np import pyqtgraph as pg import time import random class TestClass(QtGui.QMainWindow): ##################################################### def _

问题 I am trying to get the (x,y) values of my random function plot whenever I move the moused on top of the graph. I am using pyqtgraph.SignalProxy and connect it to a callback mousedMoved. I am getting this as error: NameError: global name 'mouseMoved' is not defined Here is the code: import sys from pyqtgraph.Qt import QtGui, QtCore import numpy as np import pyqtgraph as pg import time import random class TestClass(QtGui.QMainWindow): ##################################################### def _

问题 So I have this dial image I'm using for a PyQt widget. Right now, as you can see, the gradient indicator, the arc of green-yellow-red is static and is part of the image. I want to create this dynamically, so that based on some ranges, the color can be determined. For example, instead of equal parts green and red, I might want about 60 degrees worth of it to be red and the rest green and yellow. For this, I shall specify some range (eg. 0-90 degrees worth should be green etc). Any ideas on how

问题 So I have this dial image I'm using for a PyQt widget. Right now, as you can see, the gradient indicator, the arc of green-yellow-red is static and is part of the image. I want to create this dynamically, so that based on some ranges, the color can be determined. For example, instead of equal parts green and red, I might want about 60 degrees worth of it to be red and the rest green and yellow. For this, I shall specify some range (eg. 0-90 degrees worth should be green etc). Any ideas on how

问题 I have tried calling self.setStyleSheet("background: transparent; border: transparent;") on a QGraphicsView, but it still leaves a 1 pixel border on the top edge. I have also tried replacing border: transparent; with border-style: none; , but it didn't work either. Here is a screenshot of the problem: What command will fully remove the border from the QGraphicsView? 回答1: You can use one of the following css rule: graphicsView.setStyleSheet("border-width: 0px; border-style: solid") or