javascript - How to emit signal in KWin scripting API

Question

With the KWin scripting API, I know I can connect a signal with

client.signal.connect(myFunction);

to trigger some action when the script receives a signal.

But how can I emit a signal from my KWin script for other components to pick up?

I want something like

client.emit(signal);

but couldn't find anything in the API documentation and unsuccessfully tried various possible syntaxes.

My use case is that I want to emit a clientStartUserMovedResized signal before doing a geometry change, so that another script can detect that a window is about to be changed with the window with the old geometry passed over, before the clientGeometryChanged signal is automatically emitted after the change in geometry has already happened and the old geometry is lost.

标签： javascriptkde

Answer 1

正如reddit上的回答https://old.reddit.com/r/kde/comments/qndb0k/how_to_emit_signal_in_kwin_scripting_api/

很确定您只是将其称为正常功能。

• https://doc.qt.io/qt-5/qtqml-syntax-objectattributes.html#signal-handler-attributes
• https://develop.kde.org/docs/plasma/kwin/api/#signals-3
• client.clientStartUserMovedResized(client)（不知道为什么它需要引用自身作为参数）
• https://invent.kde.org/plasma/kwin/-/blob/master/src/abstract_client.cpp#L970