[英]The plot appears at wrong position when embedding Vispy SceneCanvas into PyQt5
I am trying to write a subclass of vispy.scene.SceneCanvas and use it as a plot widget in my PyQt5 application.我正在尝试编写 vispy.scene.SceneCanvas 的子类,并将其用作 PyQt5 应用程序中的绘图小部件。 However, the plot always appears at wrong position (top-right corner), and I did not get any hint from vispy docs about this problem.然而,情节总是出现在错误的位置(右上角),我没有从 vispy 文档中得到关于这个问题的任何提示。
code:代码:
import vispy.scene as scene
import numpy as np
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
from PyQt5.QtGui import *
import sys
class CustomPlot(scene.SceneCanvas):
def __init__(self, **kwargs):
super().__init__(**kwargs)
self.unfreeze()
self.grid = self.central_widget.add_grid(spacing=0)
self.vb = self.grid.add_view(row=0, col=1, camera='panzoom')
self.x_axis = scene.AxisWidget(orientation='bottom')
self.x_axis.stretch = (1, 0.1)
self.grid.add_widget(self.x_axis, row=1, col=1)
self.x_axis.link_view(self.vb)
self.y_axis = scene.AxisWidget(orientation='left')
self.y_axis.stretch = (1, 0.1)
self.grid.add_widget(self.y_axis, row=0, col=0)
self.y_axis.link_view(self.vb)
pos = np.array([[0, 0], [1, 1], [2, 0]])
line = scene.Line(pos, 'red', parent=self.vb.scene)
if __name__ == "__main__":
QApplication.setAttribute(Qt.AA_EnableHighDpiScaling)
app = QApplication([])
win = QMainWindow()
win.setCentralWidget(CustomPlot().native)
win.show()
if (sys.flags.interactive != 1) or not hasattr(Qt.QtCore, 'PYQT_VERSION'):
QApplication.instance().exec_()
I compared your code to what was in the plotting API and was able to get it to work using height_max
and width_max
instead of stretch
.我将您的代码与绘图 API 中的代码进行了比较,并能够使用height_max
和width_max
而不是stretch
来使其工作。 See https://github.com/vispy/vispy/blob/efa49b6896321374149998e15f8bce2ae327ba70/vispy/plot/plotwidget.py#L116-L131见https://github.com/vispy/vispy/blob/efa49b6896321374149998e15f8bce2ae327ba70/vispy/plot/plotwidget.py#L116-L131
Here is what the code looks like for me now:这是我现在的代码:
import vispy.scene as scene
import numpy as np
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
from PyQt5.QtGui import *
import sys
class CustomPlot(scene.SceneCanvas):
def __init__(self, **kwargs):
super().__init__(**kwargs)
self.unfreeze()
self.grid = self.central_widget.add_grid(spacing=0)
self.vb = self.grid.add_view(row=0, col=1, camera='panzoom')
self.x_axis = scene.AxisWidget(orientation='bottom')
self.grid.add_widget(self.x_axis, row=1, col=1)
self.x_axis.height_max = 40
self.x_axis.link_view(self.vb)
self.y_axis = scene.AxisWidget(orientation='left')
self.y_axis.width_max = 40
self.grid.add_widget(self.y_axis, row=0, col=0)
self.y_axis.link_view(self.vb)
pos = np.array([[0, 0], [1, 1], [2, 0]])
line = scene.Line(pos, 'red', parent=self.vb.scene)
if __name__ == "__main__":
QApplication.setAttribute(Qt.AA_EnableHighDpiScaling)
app = QApplication([])
win = QMainWindow()
win.setCentralWidget(CustomPlot().native)
win.show()
if (sys.flags.interactive != 1) or not hasattr(Qt.QtCore, 'PYQT_VERSION'):
QApplication.instance().exec_()
The output ends up looking like:输出最终看起来像:
The problem is solved after I realize I made a noob mistake, the y-axis stretch should be set as (0.1, 1) instead of (1, 0.1), although it is interesting that it appears correctly if I don't use the canvas as a PyQt widget.在我意识到我犯了一个菜鸟错误后问题就解决了,y 轴拉伸应该设置为 (0.1, 1) 而不是 (1, 0.1),尽管有趣的是如果我不使用它会正确显示画布作为 PyQt 小部件。 @djhoese 's solution also works well. @djhoese 的解决方案也很有效。
import vispy.scene as scene
import numpy as np
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
from PyQt5.QtGui import *
import sys
class CustomPlot(scene.SceneCanvas):
def __init__(self, **kwargs):
super().__init__(**kwargs)
self.unfreeze()
self.grid = self.central_widget.add_grid(spacing=0)
self.vb = self.grid.add_view(row=0, col=1, camera='panzoom')
self.x_axis = scene.AxisWidget(orientation='bottom')
self.x_axis.stretch = (1, 0.1)
self.grid.add_widget(self.x_axis, row=1, col=1)
self.x_axis.link_view(self.vb)
self.y_axis = scene.AxisWidget(orientation='left')
self.y_axis.stretch = (0.1, 1)
self.grid.add_widget(self.y_axis, row=0, col=0)
self.y_axis.link_view(self.vb)
pos = np.array([[0, 0], [1, 1], [2, 0]])
line = scene.Line(pos, 'red', parent=self.vb.scene)
if __name__ == "__main__":
QApplication.setAttribute(Qt.AA_EnableHighDpiScaling)
app = QApplication([])
win = QMainWindow()
win.setCentralWidget(CustomPlot().native)
win.show()
if (sys.flags.interactive != 1) or not hasattr(Qt.QtCore, 'PYQT_VERSION'):
QApplication.instance().exec_()
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