使用 PyQt 在 Qt 设计器 GUI 上嵌入实时 2D 热图

Question

I am trying to embed a live 8x8 heatmap on a Qt designer based GUI. The heatmap is supposed to refresh at ~30Hz. I have created a widget on the GUI window and promoted it to a 'Heatmap' class that I created in a python file.

Based on the research I have done online, pyqtgraph seems like something I could use for this. I am trying to inherit the Heatmap class from the pyqtgraph.ImageItem class but getting an error when running the GUI. Here's how the Qt designer output file (created from the .ui file) is creating an instance of the Heatmap class:

self.heatmap = Heatmap(self.verticalLayoutWidget_2)

where verticalLayoutWidget_2 is a vertical layout widget I created on the GUI window.

But it gives the following error:

TypeError: addWidget(self, QWidget, stretch: int = 0, alignment: Union[Qt.Alignment, Qt.AlignmentFlag] = 0): argument 1 has unexpected type 'Heatmap'

I am not sure if the packages I am trying to use are the best or even the correct ones for creating the live heatmap. I'd appreciate any help that would point me in the right direction. I am new to python based GUI development so please bear with me.

Answer 1

If you are inheriting from ImageItem, your heatmap does not inherit from QWidget, which is the required input to addWidget. Try inheriting from ImageView, which inherits directly from QWidget.