Pyside2中的2D可点击表面

如何解决Pyside2中的2D可点击表面

我正在使用 PySide2 为项目编写一个简单的GUI界面。 我使用的是典型的MVC设计模式，为清楚起见，我将仅发布GUI的代码（不包含控制器和支持方法等）

这是代码：

from PySide2.QtWidgets import *
from PySide2.QtWidgets import QSizePolicy
from PySide2.QtGui import QIcon
from PySide2.QtWidgets import (QPushButton,QMainWindow)

class myView(QMainWindow):

    def __init__(self,parent=None):
        """View initializer."""

        #Creates blank view of a given size
        super().__init__()

        # Set some main window's properties
        self.setWindowTitle('8D.me')
        self.setFixedSize(800,500) # Block user resize of the window
        self.setIcon()
        self.generalLayout = QHBoxLayout() #Layout generale

        self.button = QPushButton('test3',self)
        self.button.setSizePolicy(
            QSizePolicy.Preferred,QSizePolicy.Expanding)
        self.generalLayout.addWidget(QPushButton('test2',self),1)
        self.generalLayout.addWidget(self.button,3)

        # Set the central widget
        self._centralWidget = QWidget(self) #creates a QWidget object to play the role of a central widget. Remember that since your GUI class inherits from QMainWindow,you need a central widget. This object will be the parent for the rest of the GUI component.
        self.setCentralWidget(self._centralWidget)
        self._centralWidget.setLayout(self.generalLayout)

# Insert methods for creating/adding elements to the default view.
# Mehods....
    def setIcon(self):
        appIcon = QIcon('logo')
        self.setWindowIcon(appIcon)

#Insert here the public methods called by the Controller to update the view...

我的GUI右号非常简单，看起来像这样：

我想做的是更改test 3按钮并插入一个2D可单击的表面。 更详细地讲，我希望能够在此表面上的任意位置单击并获得鼠标单击的位置。

基本上，我想创建2D xy轴并检索鼠标单击的坐标，如下所示：

然后，如果我单击位置(1,1)，我将打印出类似“您单击了轴上的（1,1）的内容”的信息。

我到处寻找示例，教程和文档，但是找不到任何合适的工具来创建自己想要的东西。 PySide2软件包中是否有任何类可以帮助我？

解决方法

如果从字面上看，您的目标是在图像中获得X-Y平面，则可能的解决方案是使用QGraphicsView：

import math
import sys

from PySide2.QtCore import Signal,QPointF
from PySide2.QtGui import QColor,QPainterPath
from PySide2.QtWidgets import (
    QApplication,QGraphicsScene,QGraphicsView,QHBoxLayout,QMainWindow,QPushButton,QWidget,)


class GraphicsScene(QGraphicsScene):
    clicked = Signal(QPointF)

    def drawBackground(self,painter,rect):
        l = min(rect.width(),rect.height()) / 30

        x_left = QPointF(rect.left(),0)
        x_right = QPointF(rect.right(),0)
        painter.drawLine(x_left,x_right)

        right_triangle = QPainterPath()
        right_triangle.lineTo(-0.5 * math.sqrt(3) * l,0.5 * l)
        right_triangle.lineTo(-0.5 * math.sqrt(3) * l,-0.5 * l)
        right_triangle.closeSubpath()
        right_triangle.translate(x_right)

        painter.setBrush(QColor("black"))
        painter.drawPath(right_triangle)

        y_top = QPointF(0,rect.top())
        y_bottom = QPointF(0,rect.bottom())
        painter.drawLine(y_top,y_bottom)

        top_triangle = QPainterPath()
        top_triangle.lineTo(.5*l,-0.5 * math.sqrt(3) * l)
        top_triangle.lineTo(-.5*l,-0.5 * math.sqrt(3) * l)
        top_triangle.closeSubpath()
        top_triangle.translate(y_bottom)

        painter.setBrush(QColor("black"))
        painter.drawPath(top_triangle)

    def mousePressEvent(self,event):
        sp = event.scenePos()
        self.clicked.emit(sp)
        super().mousePressEvent(event)


class MyView(QMainWindow):
    def __init__(self,parent=None):
        super().__init__(parent)
        self.setWindowTitle("8D.me")
        self.setFixedSize(800,500)

        self.btn = QPushButton("test2")

        self.view = QGraphicsView()
        self.view.scale(1,-1)
        self.scene = GraphicsScene()
        self.view.setScene(self.scene)

        central_widget = QWidget()
        self.setCentralWidget(central_widget)
        layout = QHBoxLayout(central_widget)
        layout.addWidget(self.btn)
        layout.addWidget(self.view)

        self.scene.clicked.connect(self.handle_clicked)

    def handle_clicked(self,p):
        print("clicked",p.x(),p.y())


if __name__ == "__main__":
    app = QApplication(sys.argv)
    w = MyView()
    w.show()
    sys.exit(app.exec_())