WPF - Allow ToolTip timer configuration

[amaitland]

Related to issue #4048

Summary:
Allow programmatic configuration of ToolTip timer delay.

Changes:

• Can set initial show delay in xaml via existing ToolTipService e.g. ToolTipService.InitialShowDelay="100"
• If InitialShowDelay = 0 then no timer is used and ToolTip is immediately shown
• Previous delay was 500ms, new delay is the .Net default (typically 1000ms)
• ToolTipService.GetInitialShowDelay is currently only called in OnLoaded, setting the delay dynamically is not currently supported. Simplest option is to set the delay in xaml

How Has This Been Tested?

• Manually via CefSharp.Wpf.Example

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Updated documentation

Checklist:

• Tested the code(if applicable)
• Commented my code
• Changed the documentation(if applicable)
• New files have a license disclaimer
• The formatting is consistent with the project (project supports .editorconfig)

Summary by CodeRabbit

• Bug Fixes
  • Improved tooltip behavior for the ChromiumWebBrowser control so tooltips open and close more reliably when content changes.
  • Tooltip show delay now respects system/user settings (initial show delay), giving a more consistent and expected experience.

[amaitland]

If InitialShowDelay = 0 then no timer is used and ToolTip is immediately shown

Related discussion at #4048 (comment)

There's still a few other cases that should be tested.

[AppVeyorBot]

❌ Build CefSharp 110.0.220-CI4686 failed (commit 9cf549765a by @amaitland)

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 1486ab36-710d-453d-a4ca-8704404b7cd4

📥 Commits

Reviewing files that changed from the base of the PR and between e34ce46 and af32f7e.

📒 Files selected for processing (1)

• CefSharp.Wpf/ChromiumWebBrowser.cs

🚧 Files skipped from review as they are similar to previous changes (1)

• CefSharp.Wpf/ChromiumWebBrowser.cs

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📝 Walkthrough

Walkthrough

Refactors ChromiumWebBrowser tooltip handling: early-returns on empty tooltip text, opens/closes immediately when no timer, otherwise starts/stops an existing timer; OnLoaded now creates the DispatcherTimer only when ToolTipService.GetInitialShowDelay(this) > 0 and uses that delay as the interval.

Changes

Tooltip Handling Cohort

Layer / File(s)	Summary
Tooltip text change handler CefSharp.Wpf/ChromiumWebBrowser.cs	Reorders early-return when both old/new tooltip are empty, moves timer retrieval after that check, opens/closes tooltip immediately if no timer, otherwise starts/stops the timer based on new tooltip text.
Tooltip timer initialization on load CefSharp.Wpf/ChromiumWebBrowser.cs	Uses ToolTipService.GetInitialShowDelay(this) to determine timer creation and interval (milliseconds); only creates DispatcherTimer when delay > 0 and keeps it initially disabled with the existing tick handler and priority.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

Poem

A rabbit taps keys with a twitch and a wink,
Timers now heed the delay they should think.
Empty tips vanish, others wait their cue,
Small hops, tidy code — a browser made new. 🐇

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely describes the main change: allowing ToolTip timer configuration in WPF, which directly relates to the core modification in ChromiumWebBrowser.cs.
Description check	✅ Passed	The description includes most required sections: summary, changes, testing details, and types/checklist. All critical information is present and complete, though inline code comments were not added (marked unchecked).
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch wpf/configuretooltiptimer

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[amaitland]

@coderabbitai review

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[AppVeyorBot]

✅ Build CefSharp 138.0.330-CI5331 completed (commit d4c5b007a7 by @amaitland)

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@coderabbitai review

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❌ Build CefSharp 149.0.20-CI5522 failed (commit 66a7c78dd1 by @amaitland)