PyQt Node 接口 - ItemIsMovable 对象的父对象
PyQt Node interface - Parrent to ItemIsMovable object
因此，我正在使用 PyQt 为我正在处理的项目构建一个基于节点的界面，但在 space 中让属于基础的对象不遵循它时遇到了一些问题。我希望当用户拖动基本节点时，子对象（输入和输出框）跟随它。我有一个可用的可拖动节点，但子对象没有正确跟随。有任何想法吗？
#!/usr/bin/python
# -*- coding: utf-8 -*-
"""
This is the base py file for the GUI
"""
import sys
from PyQt4 import QtGui, QtCore
from array import *
"""
Base class for a node. Contains all the initialization, drawing, and containing inputs and outputs
"""
class node():
width = 100
height = 100
color = 1
x = 90
y = 60
inputs=[]
outputs=[]
def __init__(self, nWidth, nHeight):
self.width = nWidth
self.height = nHeight
self.iniNodeData()
"""
This is where inputs and outputs will be created
"""
def iniNodeData(self):
for j in range(5):
this = self
x = input(this,90, 0+(j*10))
self.inputs.append(x)
"""Draw the node then the input and output objects"""
def draw(self, drawObj):
item = drawObj.addRect(self.x, self.y, self.width, self.height)
item.setFlag(QtGui.QGraphicsItem.ItemIsMovable)
for curInput in self.inputs:
curInput.draw(drawObj)
print("(", self.x, ",", self.y, ")")
"""
Nodes will evaluate from the last node to the first node, therefore inputs are evaluted
"""
class input():
currentConnectedNode = None
currentConnectedOutput = None
parentNode = None
width = 10
height = 10
x = 1
y = 1
color = 1
def __init__(self, pnode, posX, posY):
self.parentNode = pnode
self.x = posX
self.y = posY
self.color = 1
def draw(self, drawObj):
item = drawObj.addRect(self.x+self.parentNode.x, self.y+self.parentNode.y, self.width, self.height)
class output():
parentNode = None
class MainWindow(QtGui.QGraphicsView):
nodes = []
def __init__(self):
super(MainWindow, self).__init__()
self.initUI()
def initUI(self):
for j in range(1):
x = node(100,100)
self.nodes.append(x)
self.setScene(QtGui.QGraphicsScene())
self.setWindowTitle('RIS RIB Generator')
self.setGeometry(800, 600, 800, 850)
self.initNodes()
self.show()
def initNodes(self):
for curNode in self.nodes:
curNode.draw(self.scene())
def main():
app = QtGui.QApplication(sys.argv)
mainwindow = MainWindow()
mainwindow.show()
app.exec_()
if __name__ == '__main__':
main()
好的，一周后我弄明白了。你需要做几件事。
确保标志正确：
self.setFlag(QtGui.QGraphicsItem.ItemIsMovable, True)
self.setFlag(QtGui.QGraphicsItem.ItemIsSelectable, True)
一旦设置好，您就可以使用内置的事件处理程序，但这些会覆盖原始事件处理程序。因此，从您的用户定义的内部，您需要从基础 class 调用事件处理程序。示例：
def mousePressEvent(self, e):
print("Square got mouse press event")
print("Event came to us accepted: %s"%(e.isAccepted(),))
QtGui.QGraphicsRectItem.mousePressEvent(self, e)
这是我进步的工作示例。
#!/usr/bin/python
# -*- coding: utf-8 -*-
"""
This is the base py file for the GUI
Todo list
-----------------
- Pop up menu for adding new Nodes
- node connectivity
- create data structure for storing
"""
import sys
from PyQt4 import QtGui, QtCore
from array import *
"""
Base class for a node. Contains all the inilization, drawing, and containing inputs and outputs
"""
class node(QtGui.QGraphicsRectItem):
width = 100
height = 100
color = 1
x = 90
y = 60
inputs=[]
outputs=[]
viewObj = None
def __init__(self, n_x, n_y, n_width,n_height):
QtGui.QGraphicsRectItem.__init__(self, n_x, n_y, n_width, n_height)
self.width = n_width
self.height = n_height
self.x = n_x
self.y = n_y
self.setFlag(QtGui.QGraphicsItem.ItemIsMovable, True)
self.setFlag(QtGui.QGraphicsItem.ItemIsSelectable, True)
self.iniNodeData()
def mousePressEvent(self, e):
print("Square got mouse press event")
print("Event came to us accepted: %s"%(e.isAccepted(),))
QtGui.QGraphicsRectItem.mousePressEvent(self, e)
def mouseReleaseEvent(self, e):
print("Square got mouse release event")
print("Event came to us accepted: %s"%(e.isAccepted(),))
QtGui.QGraphicsRectItem.mouseReleaseEvent(self, e)
"""
This is where inputs and outputs will be created based on node type
"""
def iniNodeData(self):
print('making node data')
for j in range(5):
this = self
x = input(this,0, 0+(j*10))
self.inputs.append(x)
for k in range(5):
this = self
x = output(this,self.x+self.width, self.y+(k*10))
self.outputs.append(x)
def mouseMoveEvent(self, event):
print('Dragging@')
QtGui.QGraphicsRectItem.mouseMoveEvent(self, event)
def mousePressEvent(self, event):
print('moving!')
"""
Nodes will evaluate from the last node to the first node, therefore inputs are evaluted
"""
class input(QtGui.QGraphicsRectItem):
currentConnectedNode = None
currentConnectedOutput = None
parentNode = None
width = 10
height = 10
x = 1
y = 1
color = 1
drawItem = None
def __init__(self, pnode, posX, posY):
self.parentNode = pnode
self.x = posX
self.y = posY
self.color = 1
QtGui.QGraphicsRectItem.__init__(self, self.x+self.parentNode.x, self.y+self.parentNode.y, self.width, self.height, self.parentNode)
'''
Output value from a node
'''
class output(node):
parentNode = None
width = 10
height = 10
x = 1
y = 1
def __init__(self, pnode, posX, posY):
self.parentNode = pnode
self.x = posX
self.y = posY
self.color = 1
QtGui.QGraphicsRectItem.__init__(self, self.x-self.width, self.y, self.width, self.height, self.parentNode)
'''
Check Click events on the scene Object
'''
class Scene(QtGui.QGraphicsScene):
nodes = []
def mousePressEvent(self, e):
print("Scene got mouse press event")
print("Event came to us accepted: %s"%(e.isAccepted(),))
QtGui.QGraphicsScene.mousePressEvent(self, e)
def mouseReleaseEvent(self, e):
print("Scene got mouse release event")
print("Event came to us accepted: %s"%(e.isAccepted(),))
QtGui.QGraphicsScene.mouseReleaseEvent(self, e)
def dragMoveEvent(self, e):
print('Scene got drag move event')
def addNode(self):
newNode = self.addItem(node(250,250,100,150))
self.nodes.append(newNode)
'''
Main Window Object
'''
class MainWindowUi(QtGui.QMainWindow):
def __init__(self):
QtGui.QMainWindow.__init__(self)
self.setWindowTitle('RIS RIB Generator')
self.scene = Scene(0, 0, 800, 850, self)
self.view = QtGui.QGraphicsView()
self.setCentralWidget(self.view)
self.view.setScene(self.scene)
exitAction = QtGui.QAction(QtGui.QIcon('exit24.png'), 'Exit', self)
exitAction.setShortcut('Ctrl+Q')
exitAction.setStatusTip('Exit application')
exitAction.triggered.connect(self.close)
newNodeAction = QtGui.QAction(QtGui.QIcon('exit24.png'), 'New Node', self)
newNodeAction.setStatusTip('Add a blank node')
newNodeAction.triggered.connect(self.scene.addNode)
self.statusBar()
menubar = self.menuBar()
fileMenu = menubar.addMenu('&File')
fileMenu.addAction(newNodeAction)
fileMenu.addAction(exitAction)
'''
Start Point
'''
if __name__ == '__main__':
app = QtGui.QApplication(sys.argv)
win = MainWindowUi()
win.show()
sys.exit(app.exec_())
因此，我正在使用 PyQt 为我正在处理的项目构建一个基于节点的界面，但在 space 中让属于基础的对象不遵循它时遇到了一些问题。我希望当用户拖动基本节点时，子对象（输入和输出框）跟随它。我有一个可用的可拖动节点，但子对象没有正确跟随。有任何想法吗？
#!/usr/bin/python
# -*- coding: utf-8 -*-
"""
This is the base py file for the GUI
"""
import sys
from PyQt4 import QtGui, QtCore
from array import *
"""
Base class for a node. Contains all the initialization, drawing, and containing inputs and outputs
"""
class node():
width = 100
height = 100
color = 1
x = 90
y = 60
inputs=[]
outputs=[]
def __init__(self, nWidth, nHeight):
self.width = nWidth
self.height = nHeight
self.iniNodeData()
"""
This is where inputs and outputs will be created
"""
def iniNodeData(self):
for j in range(5):
this = self
x = input(this,90, 0+(j*10))
self.inputs.append(x)
"""Draw the node then the input and output objects"""
def draw(self, drawObj):
item = drawObj.addRect(self.x, self.y, self.width, self.height)
item.setFlag(QtGui.QGraphicsItem.ItemIsMovable)
for curInput in self.inputs:
curInput.draw(drawObj)
print("(", self.x, ",", self.y, ")")
"""
Nodes will evaluate from the last node to the first node, therefore inputs are evaluted
"""
class input():
currentConnectedNode = None
currentConnectedOutput = None
parentNode = None
width = 10
height = 10
x = 1
y = 1
color = 1
def __init__(self, pnode, posX, posY):
self.parentNode = pnode
self.x = posX
self.y = posY
self.color = 1
def draw(self, drawObj):
item = drawObj.addRect(self.x+self.parentNode.x, self.y+self.parentNode.y, self.width, self.height)
class output():
parentNode = None
class MainWindow(QtGui.QGraphicsView):
nodes = []
def __init__(self):
super(MainWindow, self).__init__()
self.initUI()
def initUI(self):
for j in range(1):
x = node(100,100)
self.nodes.append(x)
self.setScene(QtGui.QGraphicsScene())
self.setWindowTitle('RIS RIB Generator')
self.setGeometry(800, 600, 800, 850)
self.initNodes()
self.show()
def initNodes(self):
for curNode in self.nodes:
curNode.draw(self.scene())
def main():
app = QtGui.QApplication(sys.argv)
mainwindow = MainWindow()
mainwindow.show()
app.exec_()
if __name__ == '__main__':
main()
好的，一周后我弄明白了。你需要做几件事。
确保标志正确：
self.setFlag(QtGui.QGraphicsItem.ItemIsMovable, True)
self.setFlag(QtGui.QGraphicsItem.ItemIsSelectable, True)
一旦设置好，您就可以使用内置的事件处理程序，但这些会覆盖原始事件处理程序。因此，从您的用户定义的内部，您需要从基础 class 调用事件处理程序。示例：
def mousePressEvent(self, e):
print("Square got mouse press event")
print("Event came to us accepted: %s"%(e.isAccepted(),))
QtGui.QGraphicsRectItem.mousePressEvent(self, e)
这是我进步的工作示例。
#!/usr/bin/python
# -*- coding: utf-8 -*-
"""
This is the base py file for the GUI
Todo list
-----------------
- Pop up menu for adding new Nodes
- node connectivity
- create data structure for storing
"""
import sys
from PyQt4 import QtGui, QtCore
from array import *
"""
Base class for a node. Contains all the inilization, drawing, and containing inputs and outputs
"""
class node(QtGui.QGraphicsRectItem):
width = 100
height = 100
color = 1
x = 90
y = 60
inputs=[]
outputs=[]
viewObj = None
def __init__(self, n_x, n_y, n_width,n_height):
QtGui.QGraphicsRectItem.__init__(self, n_x, n_y, n_width, n_height)
self.width = n_width
self.height = n_height
self.x = n_x
self.y = n_y
self.setFlag(QtGui.QGraphicsItem.ItemIsMovable, True)
self.setFlag(QtGui.QGraphicsItem.ItemIsSelectable, True)
self.iniNodeData()
def mousePressEvent(self, e):
print("Square got mouse press event")
print("Event came to us accepted: %s"%(e.isAccepted(),))
QtGui.QGraphicsRectItem.mousePressEvent(self, e)
def mouseReleaseEvent(self, e):
print("Square got mouse release event")
print("Event came to us accepted: %s"%(e.isAccepted(),))
QtGui.QGraphicsRectItem.mouseReleaseEvent(self, e)
"""
This is where inputs and outputs will be created based on node type
"""
def iniNodeData(self):
print('making node data')
for j in range(5):
this = self
x = input(this,0, 0+(j*10))
self.inputs.append(x)
for k in range(5):
this = self
x = output(this,self.x+self.width, self.y+(k*10))
self.outputs.append(x)
def mouseMoveEvent(self, event):
print('Dragging@')
QtGui.QGraphicsRectItem.mouseMoveEvent(self, event)
def mousePressEvent(self, event):
print('moving!')
"""
Nodes will evaluate from the last node to the first node, therefore inputs are evaluted
"""
class input(QtGui.QGraphicsRectItem):
currentConnectedNode = None
currentConnectedOutput = None
parentNode = None
width = 10
height = 10
x = 1
y = 1
color = 1
drawItem = None
def __init__(self, pnode, posX, posY):
self.parentNode = pnode
self.x = posX
self.y = posY
self.color = 1
QtGui.QGraphicsRectItem.__init__(self, self.x+self.parentNode.x, self.y+self.parentNode.y, self.width, self.height, self.parentNode)
'''
Output value from a node
'''
class output(node):
parentNode = None
width = 10
height = 10
x = 1
y = 1
def __init__(self, pnode, posX, posY):
self.parentNode = pnode
self.x = posX
self.y = posY
self.color = 1
QtGui.QGraphicsRectItem.__init__(self, self.x-self.width, self.y, self.width, self.height, self.parentNode)
'''
Check Click events on the scene Object
'''
class Scene(QtGui.QGraphicsScene):
nodes = []
def mousePressEvent(self, e):
print("Scene got mouse press event")
print("Event came to us accepted: %s"%(e.isAccepted(),))
QtGui.QGraphicsScene.mousePressEvent(self, e)
def mouseReleaseEvent(self, e):
print("Scene got mouse release event")
print("Event came to us accepted: %s"%(e.isAccepted(),))
QtGui.QGraphicsScene.mouseReleaseEvent(self, e)
def dragMoveEvent(self, e):
print('Scene got drag move event')
def addNode(self):
newNode = self.addItem(node(250,250,100,150))
self.nodes.append(newNode)
'''
Main Window Object
'''
class MainWindowUi(QtGui.QMainWindow):
def __init__(self):
QtGui.QMainWindow.__init__(self)
self.setWindowTitle('RIS RIB Generator')
self.scene = Scene(0, 0, 800, 850, self)
self.view = QtGui.QGraphicsView()
self.setCentralWidget(self.view)
self.view.setScene(self.scene)
exitAction = QtGui.QAction(QtGui.QIcon('exit24.png'), 'Exit', self)
exitAction.setShortcut('Ctrl+Q')
exitAction.setStatusTip('Exit application')
exitAction.triggered.connect(self.close)
newNodeAction = QtGui.QAction(QtGui.QIcon('exit24.png'), 'New Node', self)
newNodeAction.setStatusTip('Add a blank node')
newNodeAction.triggered.connect(self.scene.addNode)
self.statusBar()
menubar = self.menuBar()
fileMenu = menubar.addMenu('&File')
fileMenu.addAction(newNodeAction)
fileMenu.addAction(exitAction)
'''
Start Point
'''
if __name__ == '__main__':
app = QtGui.QApplication(sys.argv)
win = MainWindowUi()
win.show()
sys.exit(app.exec_())