Color preview in IDE doesn't show correct colors for a custom Colors class

[pablobarrera]

Steps to Reproduce

I'm trying to create a custom palette of colors where the squares of the color preview can be seen in the IDE.

I created a class Palette with static const colors, and this is what I see:

If I rename the class Palette to Colors, this is what I see:

But the color other doesn't show its preview and the color values shown above aren't the values I defined:

So my questions are:

• How can I preview the correct colors in autocomplete?
• Is it possible to use the name Palette instead of Colors to show that?

Note: I'm using Android Studio.

Version info

[✓] Flutter (Channel beta, v1.9.1+hotfix.4, on Linux, locale en_US.UTF-8)
• Flutter version 1.9.1+hotfix.4 at /home/pablo/work/soft/flutter
• Framework revision cc949a8e8b (6 weeks ago), 2019-09-27 15:04:59 -0700
• Engine revision b863200c37
• Dart version 2.5.0

[✓] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
• Android SDK at /home/pablo/work/soft/android-sdk
• Android NDK location not configured (optional; useful for native profiling
support)
• Platform android-29, build-tools 28.0.3
• ANDROID_HOME = /home/pablo/work/soft/android-sdk
• ANDROID_SDK_ROOT = /home/pablo/work/soft/android-sdk
• Java binary at: /home/pablo/work/soft/android-studio/jre/bin/java
• Java version OpenJDK Runtime Environment (build
1.8.0_202-release-1483-b49-5587405)
• All Android licenses accepted.

[✓] Android Studio (version 3.5)
• Android Studio at /home/pablo/work/soft/android-studio
• Flutter plugin version 39.0.3
• Dart plugin version 191.8423
• Java version OpenJDK Runtime Environment (build
1.8.0_202-release-1483-b49-5587405)

[pq]

Hi @pablobarrera. We have special logic to render Color constant values. Currently it's using a simple heuristic (the name) and I'm not sure how involved it would be to enhance it to use type information (TBH I'm not sure how much is encoded in IntelliJ's element model). @devoncarew: you have any idea how feasible this is?

[AlexV525]

The issue still persist in Dart 2.12.2.

[stlr00]

Need it too

[ibrahim135]

Need color palette for custom colors as it will be helpful. Any update on this?

[pq]

Hi. You're right that it has not been implemented and deserves some research. For anyone curious, here's where we encode awareness of Colors:

flutter-intellij/flutter-idea/src/io/flutter/editor/FlutterCompletionContributor.java

Line 48 in 0c045af

final String declaringType = suggestion.getDeclaringType();

The rub is we only have a string type representation (and can't ask, for example, if the declaring type holds a bunch of Color consts).

If anyone wants to do some investigation, ideas are most welcome!