Question

我尝试制作一个功能类似于底座的GNOME扩展程序，除了它显示状态信息（时间，电池等）。我在这里坚持的是，当光标进入特定像素区域时，如何显示信息？比如，如果屏幕是1600x900像素（仅作为示例），它应该在function gatherArtwork(_callback) { // Read each of the mp3s to gather artwork ('url' == local var for mp3) <% @related_titles.each do |url| %> jsmediatags.read("<%= url['mp3'] %>", { onSuccess: function(tag) { console.log('Gathering album art for title...'); // Convert the image contents to a Base64 encoded str var tags = tag.tags; albumartwork = _arrayBufferToBase64(tags.picture["data"]); // Append to the coverflow list a `<ul><li> </li></ul>` for each mp3 // The 'albumartwork' Base64 image str is also appended here $("#coverflow-item-list").append('<ul><li>...</li></li>'); } }); <% end %> console.log('Gathered all art! Now I will callback and render the Coverflow'); _callback(); } // Gather artwork MUST complete fully before the `makeitrain` function runs (callback) function renderCoverflow() { gatherArtwork(function() { console.log('Initing Coverflow since gatherArtwork completed/we have art!'); makeitrain(); }); } // Execute 'renderCoverflow' which will gather art and then "makeitrain"! renderCoverflow();和x>1550时激活。这不是实际的像素范围，而是在一般区域中的某些东西。我的问题是，我怎样才能使它经常检查光标是否在该区域？我可以做一个while循环，但我认为这将是资源丰富的，必须有一个更好的方法。在那儿？到目前为止，我已经查看了其他扩展以及API的在线，但似乎我找不到任何可能有用的东西。我看到一个看起来很有前途的主环，但我并不是真的理解它。

提前致谢！

Answer 1

Note, you can't use an infinite while loop since it would block the shell; you have to use the mainloop.

You can use the pointerWatcher (more convenient since they added idle monitor detection):
https://gitlab.gnome.org/GNOME/gnome-shell/blob/master/js/ui/pointerWatcher.js

Example:

let PointerWatcher = imports.ui.pointerWatcher;

let watcher = new PointerWatcher.PointerWatcher();

let watch = watcher.addWatch(50, (x, y) => {
    let m = Main.layoutManager.currentMonitor;

    if ((m.height - y) < 200 && (m.width - x) < 200) {
        Main.notify("asdf");
    }
});

// watch.remove();

There is also that Meta.Barrier thing. Might look into.

当鼠标在GNOME中进入屏幕上的特定像素范围时激活方法

1 个答案: