How to update a Windows project to ensure the window is shown
- Who is affected
- Applications and packages relying on the previous behaviour or signature.
- Practical impact
- Behaviour or API differences that can break builds or change runtime behaviour.
- What action should I take?
- Review the linked source, update affected code and run your test suite before upgrading.
Before and after (from the official guide)
dart+5−0
Before
| 1 | flutter_controller_->engine()->SetNextFrameCallback([&]() { | |
| 2 | this->Show(); | |
| 3 | }); | |
After
| 1 | flutter_controller_->engine()->SetNextFrameCallback([&]() { | |
| 2 | this->Show(); | |
| 3 | }); | |
| 4 | + | |
| 5 | + | // Flutter can complete the first frame before the "show window" callback is |
| 6 | + | // registered. The following call ensures a frame is pending to ensure the |
| 7 | + | // window is shown. It is a no-op if the first frame hasn't completed yet. |
| 8 | + | flutter_controller_->ForceRedraw(); |
Raw before / after
flutter_controller_->engine()->SetNextFrameCallback([&]() {
this->Show();
});flutter_controller_->engine()->SetNextFrameCallback([&]() {
this->Show();
});
// Flutter can complete the first frame before the "show window" callback is
// registered. The following call ensures a frame is pending to ensure the
// window is shown. It is a no-op if the first frame hasn't completed yet.
flutter_controller_->ForceRedraw();Migration assistantAI-generated · grounded in cited sources
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AI_PROVIDER (for example to openai-compatible with a local Ollama or LM Studio endpoint) to enable grounded explanations. Everything else on this page works without an AI provider.Official migration guide·Verified classification (95%)
Listed in the official breaking-changes index (docs.flutter.dev/release/breaking-changes).
An official announcement or migration guide documents an intended behaviour or API change. A verified source change (git diff) shows code changed but does not by itself prove a public API is breaking. AI interpretations are labelled and never used to classify a change.
- Source commit
- b3045439b7c0
- Source last updated
- Oct 21, 2026
- Last synchronized
- Oct 21, 2026
- Publication status
- published
Publication history
- Oct 21, 2026, 8:31 PM: new → published (ingestion) — Backed by an official breaking-change/migration guide.
AI explanationAI-generated · grounded in cited sources
AI explanations are not configured
Set
AI_PROVIDER (for example to openai-compatible with a local Ollama or LM Studio endpoint) to enable grounded explanations. Everything else on this page works without an AI provider.Was this useful?