white check mark RESOVED `Window` s `icon` property not work

Question

white check mark RESOVED `Window` s `icon` property not working thread

theapache64 · Answer

```fun main args Array lt String gt = application Window onCloseRequest = exitApplication icon = painterResource drawables launcher icons linux png ```

theapache64 · Answer

I ve verified the image path and the image dimension is `192x192` but am getting below default java icon Is there anything else i need to do to make it work In the deprecated `Window` API it was working fine with the same image

Igor Demin · Answer

macOs doesn t work well with setting icon in runtime Icon in the Dock can be changed via icon in `build gradle` for native distribution or via global function ```Taskbar getTaskbar iconImage``` But I don t recommend to use it as the icon in the taskbar will be changed not immediately but after some time 1 2 sec We covered that in gt Note that to change the icon on the taskbar on some OS macOs you should change icon in And in JavaDoc gt param icon Icon in the titlebar of the window for platforms which support this

Igor Demin · Answer

I assume we should write about macOs in JavaDoc and even throw an exception with the link to the tutorial But I am not 100 sure will this decision be good for the users of library Maybe we should return to the old approach setting `Taskbar getTaskbar iconImage` in runtime automatically as in AppWindow thinking face Will setting icon in build gradle be enough for you or it would be better to set icon in Window only to not see the default icon every time you debug your application

theapache64 · Answer

By saying setting icon in build gradle ```macOS iconFile set iconsRoot resolve launcher icons macos icns ``` do you mean this or is this changed in new APIs I already have that in place

theapache64 · Answer

I ve tried the `Taskbar iconImage` it works but as a developer I expect to work this via the `icon` param `Window` API

Igor Demin · Answer

gt By saying setting icon in build gradle Yes but this will work only for native distribution For ` gradlew run` you can set it via ```application jvmArgs Xdock icon=src jvmMain resources ic launcher png ``` It is not obvious so I think we should make it a default gt expect to work this via the `icon` param There is another problem if you set icon for Window not in `icns` format then the icon will be changed in 1 2 seconds after you run the application By changed I mean the quality of icon will be changed if you use something like png icns have different resolutions so it scales better

theapache64 · Answer

Ohh got it Would be great if u can add these points to the javDoc grimacing that s the first place I look when things dont work as expected

Igor Demin · Answer

Yes we will write about this And probably we should write the warning into the console Exception would be too deadly because it can be unnoticed in a crossplatform app if it is not tested on macOs

theapache64 · Answer

yeah you re right thanks slightly smiling face

theapache64 · Answer

< Igor Demin> I got a stacktrace today saying ```java lang UnsupportedOperationException The ICON IMAGE feature is not supported on the current platform at java awt Taskbar checkFeatureSupport Unknown 1 at java awt Taskbar setIconImage Unknown 1 ``` This is happening when I call ```Taskbar getTaskbar iconImage``` in Windows 10 Any idea why its crashing thinking face

Igor Demin · Answer

Windows doesn t support setting taskbar icon explicitly Taskbar icon on Windows always equals to the icon of the current windows which is set via `icon` parameter in Window If you really want to set the taskbar icon for macOs in Runtime you should check `Taskbar getTaskbar isSupported Taskbar Feature ICON IMAGE ` But the recommendation for Compose is still the same not to use `Taskbar getTaskbar iconImage` and use `icon` in build gradle We will add ` Xdock icon` by default in the future so the icon will also be working in debug mode Until then you can add it yourself via `jvmArgs`

theapache64 · Answer

Okay thumbsup