linebender/druid

Implement file dialog default extension in mac & gtk

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#390 opened on Dec 12, 2019

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help wantedshell/gtkshell/mac

Description

The FileDialogOptions struct has a field default_type: Option<FileSpec> that specifies which of the types in allowed_types: Option<Vec<FileSpec>> is the default. If no default_type is specified or if default_type isn't actually among allowed_types then the first entry of allowed_types is the default.

PR #387 implemented it for Windows. In Windows allowed_types translate into a dropdown control in the file picker dialog and default_type determines which item in that dropdown is preselected.

This behavior needs to also be implemented in the mac and gtk platform code. If this behavior can't be implemented or doesn't make sense on the platform, then comments describing that are definitely welcome.

Contributor guide

Tech stack
rust
Domain
desktop
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
RustGTK+ basicsmacOS file dialog APIsdruid UI toolkit
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
40
Research direction
Examine the Windows implementation in PR #387 to understand the expected behavior. Then, locate the file dialog code for mac and gtk in the druid source (likely under src/platform/). Implement the default type selection similarly, or comment if not applicable. Consult any existing tests and documentation.