[v3] Make filtered dialog examples code work for linux

[bh90210]

Description

Filters for file dialogs do not work as intended.

dialog := application.OpenFileDialog().
			SetTitle("Select a file").
...
			AddFilter("Text Files", "*.txt; *.md").
			AddFilter("Video Files", "*.mov; *.mp4; *.avi")

the above snippet is from v3/examples/dialogs/main.go:l275
Right now it would produce an empty selection list for both filters.

I looked on github for C implementations of gtk_file_filter_add_pattern https://github.com/search?q=gtk_file_filter_add_pattern&type=code and indeed people seem to support the ; separator for patterns but it seems this is not something gtk does for you.

Type of change

Please select the option that is relevant.

• 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 not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration using wails doctor.

• Windows
• macOS
• Linux

If you checked Linux, please specify the distro and version.

Test Configuration

wails doctor

      Wails Doctor          

▄ Scanning system - Please wait (this may take a long time)... (1s)^C⏎
byron@byron-X570-UD /m/w/wailsfork (bugfix/v3-alpha_linux-dialog-filter-pattern) [SIGINT]> wails3 doctor
Wails (v3.0.0-dev) Wails Doctor

System

WARNING: failed to read int from file: open /sys/devices/system/cpu/cpu0/online: no such file or directory
┌────────────────────────────────────────────────────────────────────────────────┐
| Name | Ubuntu |
| Version | 24.04 |
| ID | ubuntu |
| Branding | 24.04.2 LTS (Noble Numbat) |
| Platform | linux |
| Architecture | amd64 |
| CPU | AMD Ryzen 9 3900X 12-Core Processor |
| GPU 1 | Unknown |
| GPU 2 | TU116 [GeForce GTX 1660] (NVIDIA Corporation) - Driver: nvidia |
| Memory | 32GB |
└────────────────────────────────────────────────────────────────────────────────┘

Build Environment

┌─────────────────────────────────────────────────────────┐
| Wails CLI | v3.0.0-dev |
| Go Version | go1.24.0 |
| Revision | 2abd05f |
| Modified | false |
| -buildmode | exe |
| -compiler | gc |
| CGO_CFLAGS | -I/usr/local/cuda-11.8/include/ |
| CGO_CPPFLAGS | |
| CGO_CXXFLAGS | |
| CGO_ENABLED | 1 |
| CGO_LDFLAGS | |
| GOAMD64 | v1 |
| GOARCH | amd64 |
| GOOS | linux |
| vcs | git |
| vcs.modified | false |
| vcs.revision | 2abd05f |
| vcs.time | 2025-04-28T12:27:50Z |
└─────────────────────────────────────────────────────────┘

Dependencies

┌──────────────────────────────────────┐
| gtk3 | 3.24.41-4ubuntu1.3 |
| npm | 10.8.3 |
| pkg-config | 1.8.1-2build1 |
| webkit2gtk | 2.48.1-0ubuntu0.24.04.1 |
| gcc | 12.10ubuntu1 |
| |
└────── * - Optional Dependency ───────┘

Checking for issues

SUCCESS No issues found

Diagnosis

SUCCESS Your system is ready for Wails development!

Need documentation? Run: wails3 docs
♥ If Wails is useful to you or your company, please consider sponsoring the project: wails3 sponsor

Summary by CodeRabbit

• Bug Fixes
  • Improved file filter handling in file chooser dialogs to correctly support multiple patterns separated by semicolons, ensuring all specified file types are properly recognized and selectable.
  • Fixed a Linux-specific issue that prevented filtered dialogs from working correctly.

[coderabbitai]

Walkthrough

The update revises the internal logic of the runChooserDialog function to correctly handle multiple file filter patterns separated by semicolons. Each pattern is now individually processed and registered with the GTK file filter, instead of treating the entire pattern string as a single entry. Additionally, the changelog was updated to document the fix of a Linux bug related to filtered dialogs.

Changes

File(s)	Change Summary
v3/pkg/application/linux_cgo.go	Updated runChooserDialog to split filter patterns by semicolons, trim whitespace, and add each pattern individually to GTK file filter. No changes to exported/public entities.
docs/src/content/docs/changelog.mdx	Added a new "Fixed" entry documenting the Linux filtered dialog bug fix with contributor and PR reference. No structural changes.

Possibly related PRs

• [v3 alpha] Fix deadlock of linux dialog for multiple selections #3925: Also modifies runChooserDialog and dialog handling on Linux, addressing related file dialog behavior.

Suggested reviewers

• leaanthony

Poem

A bunny with code on its mind,
Found filters all tangled, combined.
With a snip and a split,
Each pattern now fits—
Hopping through dialogs, refined!
🐇✨

---

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Reviewing files that changed from the base of the PR and between eda18d0 and 15bd7c5.

📒 Files selected for processing (2)

• docs/src/content/docs/changelog.mdx (1 hunks)
• v3/pkg/application/linux_cgo.go (1 hunks)

🚧 Files skipped from review as they are similar to previous changes (2)

• docs/src/content/docs/changelog.mdx
• v3/pkg/application/linux_cgo.go

⏰ Context from checks skipped due to timeout of 90000ms (3)

• GitHub Check: Run Go Tests v3 (macos-latest, 1.24)
• GitHub Check: Run Go Tests v3 (ubuntu-latest, 1.24)
• GitHub Check: Run Go Tests v3 (windows-latest, 1.24)

✨ Finishing Touches

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[leaanthony]

@bh90210 - Great to see you again!
Thanks for this 🙏 Please could you add an entry to the changelog located at docs/src/content/docs/changelog.mdx? Thanks!

[sonarqubecloud]

Quality Gate failed

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B Maintainability Rating on New Code (required ≥ A)

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[leaanthony]

Amazing! 🚀