Improve error message when PageController is not attached to PageView #138945
Description
Is there an existing issue for this?
- I have searched the existing issues
- I have read the guide to filing a bug
Steps to reproduce
Use either animateToPage or jumpToPage on an unattached PageController:
var pageController = PageController();
pageController.animateToPage(1);Expected results
The error message should be more like: PageController not attached to a PageView. Maybe you forgot to assign it to your PageView widget?
Actual results
The error message is: ScrollController not attached to any scroll views., which is very unhelpfull to the user
Flutter Doctor output
Doctor output
[✓] Flutter (Channel stable, 3.16.0, on Microsoft Windows [Version 10.0.19045.3693], locale de-DE)
• Flutter version 3.16.0 on channel stable at [...]
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision db7ef5bf9f (8 days ago), 2023-11-15 11:25:44 -0800
• Engine revision 74d16627b9
• Dart version 3.2.0
• DevTools version 2.28.2
[✓] Windows Version (Installed version of Windows is version 10 or higher)
[✓] Android toolchain - develop for Android devices (Android SDK version 32.1.0-rc1)
• Android SDK at [...]
• Platform android-32, build-tools 32.1.0-rc1
• Java binary at: C:\Program Files\Android\Android Studio\jre\bin\java
• Java version OpenJDK Runtime Environment (build 11.0.11+9-b60-7590822)
• All Android licenses accepted.
[✓] Chrome - develop for the web
• Chrome at C:\Program Files\Google\Chrome\Application\chrome.exe
[✓] Visual Studio - develop Windows apps (Visual Studio Community 2022 17.7.6)
• Visual Studio at C:\Program Files\Microsoft Visual Studio\2022\Community
• Visual Studio Community 2022 version 17.7.34221.43
• Windows 10 SDK version 10.0.19041.0
[✓] Android Studio (version 2021.1)
• Android Studio at C:\Program Files\Android\Android Studio
• Flutter plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/9212-flutter
• Dart plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/6351-dart
• Java version OpenJDK Runtime Environment (build 11.0.11+9-b60-7590822)
[✓] VS Code (version 1.84.2)
• VS Code at [...]
• Flutter extension version 3.54.0
[✓] Connected device (3 available)
• Windows (desktop) • windows • windows-x64 • Microsoft Windows [Version 10.0.19045.3693]
• Chrome (web) • chrome • web-javascript • Google Chrome 119.0.6045.105
• Edge (web) • edge • web-javascript • Microsoft Edge 119.0.2151.58
[✓] Network resources
• All expected network resources are available.