无法使用GSettings更改dconf-entry [英] Can't change dconf-entry with GSettings

问题描述

我目前正在 Gjs 上构建一个简单的应用程序，它应该改变我的背景图像GNOME的外壳。可以找到使用 gsettings -tool完成此操作的解决方案这里。

I'm currently building a simple application on Gjs, which should change the background-image of my gnome-shell. A solution on how this can be done using the gsettings-tool can be found here.

由于我想围绕它构建桌面应用程序，我想要更改 org.gnome.desktop.background.picture-uri -key使用Gio的 GSettings -class 。但是使用 set_X（） -method不会改变密钥的值。

Since I want to build a desktop-application around it, I want to change the org.gnome.desktop.background.picture-uri-key by using Gio's GSettings-class. But using the set_X()-method does not change the value of the key.

这是我的代码更改gsettings值：

This is my code to change the gsettings value:

var gio = imports.gi.Gio;

// Get the GSettings-object for the background-schema:
var background = new gio.Settings({schema: "org.gnome.desktop.background"});

// Read the current Background-Image:
print( "Current Background-Image: "+background.get_string("picture-uri") );

if (background.is_writable("picture-uri")){
    // Set a new Background-Image (should show up immediately):
    if (background.set_string("picture-uri", "file:///path/to/some/pic.jpg")){
        print("Success!");
    }
    else throw "Couldn't set the key!";
} else throw "The key is not writable";

读取值确实按预期工作， is_writable（） -method返回 true ， set_string（） -method也返回 true 。

Reading the value does work as expected, the is_writable()-method returns true and the set_string()-method also returns true.

我已经检查过我没有处于延迟应用模式，并且密钥有 GVariantType 字符串，所以 set_string（） -method应该有用。

I have checked that I'm not in "delay-apply" mode and the key has a GVariantType of string, so the set_string()-method should work.

使用正常 gsettings 命令行工具（如链接帖子中所述）工作正常。

Using the normal gsettings command-line tool (as explained in the linked post) works just fine.

我不能找出问题所在，有什么地方可以查找日志或其他东西吗？

I can't figure out what the problem is, is there any place I can look for logs or something?

推荐答案

此处未收到任何回复我在gjs-mailing列表上问了同样的问题 。

After not getting any responses here I asked the same question on the gjs-mailing list.

事实证明，当我的脚本退出时，对dconf的写入还没有在磁盘上，因此它们从未真正应用过。

It turned out that the writes to dconf were not yet on the disk when my script exited, so they were never really applied.

解决方案是调用 g_settings_sync（）功能（ JsDoc ）紧跟在 set_string（）函数之后，以确保所有写入都已完成。

The solution was to call the g_settings_sync() function (JsDoc) right after the set_string() function, to ensure that all writes had finished.

if (background.set_string("picture-uri", "file:///path/to/some/pic.jpg")){
    gio.Settings.sync()
    print("Success!");
}

感谢Johan Dahlin和他的回答。

Thanks to Johan Dahlin and his answer.

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