我想测试从面板上按下按钮的功能。 问题是该按钮不是 QPushButtons,而是 QGraphicWidget 元素。
如何生成此按钮,单击鼠标来测试其行为?
按钮不是简单的 QPushButton,因为它们在鼠标悬停时有特殊的行为,有动画等。 这些按钮将添加到场景中,然后将场景添加到 View 中,并将 View 作为小部件添加到布局中。 我可以看到可以使用以下方式单击 View :
QTest.mouseClick(self.panel_with_buttons.view.viewport(), Qt.LeftButton)
但这并没有点击按钮。 我还尝试指定按钮的位置:
rect = self.panel_with_buttons.button2.boundingRect()
QTest.mouseClick(self.panel_with_buttons.view.viewport(), Qt.LeftButton, pos = rect.center())
但由于某种原因,这是不受支持的论点
Button 类和 PanelWithButtons 类的代码 (panel_with_buttons.py):
from PySide2 import QtWidgets, QtCore, QtGui
class Button(QtWidgets.QGraphicsWidget):
pressed = QtCore.Signal()
def __init__(self, image_path: str, parent=None):
super().__init__(parent)
self._pixmap = QtGui.QPixmap(image_path)
def paint(self, painter, option, widget=None):
painter.setPen(QtCore.Qt.NoPen)
painter.drawPixmap(0, 0, self._pixmap)
def mousePressEvent(self, event: QtWidgets.QGraphicsSceneMouseEvent):
self.pressed.emit()
class PanelWithButtons(QtWidgets.QWidget):
def __init__(self, parent=None):
super().__init__(parent)
self.button = QtWidgets.QPushButton('button1')
self.button.clicked.connect(self.button_clicked)
pix = 'home.png'
self.button2 = Button(pix)
self.button2.pressed.connect(self.button2_pressed)
layout = QtWidgets.QVBoxLayout()
layout.addWidget(self.button)
self.scene = QtWidgets.QGraphicsScene()
self.scene.addItem(self.button2)
self.view = QtWidgets.QGraphicsView(self.scene)
layout.addWidget(self.view)
self.setLayout(layout)
@QtCore.Slot()
def button_clicked(self):
print('button1 clicked')
@QtCore.Slot()
def button2_pressed(self):
print('button2 pressed')
测试.py:
from unittest import TestCase
from PySide2 import QtWidgets
from PySide2.QtTest import QTest
from PySide2.QtCore import Qt, QPoint
from test.panel_with_buttons import PanelWithButtons
class TestPanel(TestCase):
def setUp(self) -> None:
app = QtWidgets.QApplication()
self.panel_with_buttons = PanelWithButtons()
def test_go_cargo(self):
QTest.mouseClick(self.panel_with_buttons.button, Qt.LeftButton)
rect = self.panel_with_buttons.button2.boundingRect()
QTest.mouseClick(self.panel_with_buttons.view.viewport(), Qt.LeftButton)
作为输出,我收到了对第一个按钮的鼠标点击(我可以看到“button1 clicked”),但我不知道如何生成对第二个按钮的点击。
最佳答案
panel_with_buttons.py 文件存在以下错误:
您必须创建资源的绝对路径,在本例中为图像的路径。当您运行 .py 文件时,如果传递了相对路径,则这将是启动脚本的位置,这可能会带来问题(假设图像位于 panel_with_buttons.py 旁边)。
您必须使用 resize() 方法将按钮的大小设置为图像的大小。
考虑到该文件应如下所示:
import os
from PySide2 import QtWidgets, QtCore, QtGui
current_dir = os.path.dirname(os.path.realpath(__file__))
class Button(QtWidgets.QGraphicsWidget):
pressed = QtCore.Signal()
def __init__(self, image_path: str, parent=None):
super().__init__(parent)
self._pixmap = QtGui.QPixmap(image_path)
self.resize(self._pixmap.size())
def paint(self, painter, option, widget=None):
painter.setPen(QtCore.Qt.NoPen)
painter.drawPixmap(0, 0, self._pixmap)
def mousePressEvent(self, event: QtWidgets.QGraphicsSceneMouseEvent):
self.pressed.emit()
super().mousePressEvent(event)
class PanelWithButtons(QtWidgets.QWidget):
def __init__(self, parent=None):
super().__init__(parent)
self.button = QtWidgets.QPushButton("button1")
self.button.clicked.connect(self.button_clicked)
print(os.getcwd())
pix = os.path.join(current_dir, "home.png")
self.button2 = Button(pix)
self.button2.pressed.connect(self.button2_pressed)
layout = QtWidgets.QVBoxLayout()
layout.addWidget(self.button)
self.scene = QtWidgets.QGraphicsScene()
self.scene.addItem(self.button2)
self.view = QtWidgets.QGraphicsView(self.scene)
layout.addWidget(self.view)
self.setLayout(layout)
@QtCore.Slot()
def button_clicked(self):
print("button1 clicked")
@QtCore.Slot()
def button2_pressed(self):
print("button2 pressed")
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
w = PanelWithButtons()
w.show()
sys.exit(app.exec_())
另一方面,您必须使用Button的mapToScene和QGraphicsView的mapFromScene方法获得属于Button的点相对于视口(viewport)的位置,在这种情况下,该点将是Button的中心。
from unittest import TestCase
from PySide2 import QtCore, QtCore, QtWidgets, QtTest
from test.panel_with_buttons import PanelWithButtons
class TestPanel(TestCase):
def setUp(self) -> None:
app = QtWidgets.QApplication()
self.panel_with_buttons = PanelWithButtons()
self.panel_with_buttons.resize(640, 480)
def test_go_cargo(self):
QtTest.QTest.mouseClick(
self.panel_with_buttons.button, QtCore.Qt.LeftButton
)
it = self.panel_with_buttons.button2
sp = it.mapToScene(it.rect().center())
p = self.panel_with_buttons.view.mapFromScene(sp)
QtTest.QTest.mouseClick(
self.panel_with_buttons.view.viewport(), QtCore.Qt.LeftButton, pos=p
)
关于python - 如何在QTest中的QGraphicsWidget上生成鼠标点击?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/57007556/