Hi, all! It’s gnuradio-conference celebrity, right? Hope you could get what you want from this gr-con.

This is the official final week. As previously mentioned, I still want to keep on until the CPython official support builds wasm version. In this blog, I plan to illustrate the basic code structure in gr-web.

Those are based on my thought. The code commit version: gnuradio/grc/gui_qt/components at feature-grc-qt-rebased · haakov/gnuradio (github.com) (Much thanks to haakov, he give me much help)

Okay, the important thing is there are different layouts, I will start with delete module from flow graph. Here we call the func delete_triggered(self) in grc/gui_qt/components/windows.py And then we jump to grc/gui_qt/flowgraph.py to call func delete_selected which will finally call grc/core/FlowGraph.py func remove_element.

So, we stand in the windows.py, here set the event to specific triggered function, like move rotate, and then it will call a super class method or update the whole graph.

Back to the filesystem support, here the emscripten implements a virtual filesystem above the browser to achieve safety I guess. And In 3.8 later version for gnuradio, support YAML first on the file input or output. What we want to do is simple: open and save, copy and paste.

For open: Parse flowgraph from the input or hard-coded file path Import data from the path Update flow_graph and display. For save: Export data from flow_graph Output data to YAML type file Save the YAML type file For copy: Iterate the blocks list to find the selected block position Return a tuple containing the property of the selected block For paste: Check the clipboard have content Copy the content and generate a new block Update flow graph

But in actual development, I faced many weird issues, like after selecting the file path, but cannot return the file path if I intend to open a file.

For the deliverable, I know there exists a huge gap between mines and the target. To be honest, I have learned a lot from this activity. The impressive thing is risk management (hahaha), I should be more controllable to my schedule but ignored by various things. I am SORRY!

acknowledgments

@Marc, The daily week with Marc is my pleasant day since we can talk about the schedule and plan. Even though there

@Haakov He is a nice man, He helps me solve many vital problems(hahaha, in the beginning, my email is set as spam, but Haakov helps me to together with all).

@Marcus Even though he did not appear many times, he always encourage me to insist on cool things.

@Community EveryOne give me help and comment and advice, those are all the best reply!