linebender/druid

File Open dialog issue

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#115 opened on Aug 9, 2019

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 (1 comment) (0 reactions) (0 assignees)Rust (9,091 stars) (567 forks)batch import
bughelp wanted

Description

I'm having issues combining File Open dialogs and timers in the druid-shell hello example.

Currently File Open dialogs block while holding a mutable borrow on the WinHandler until the dialog comes back with a result path. If a timer event triggers while the dialog is open, it panics with "already borrowed".

#95 mentions a possible solution. Are there other solutions to consider?

As a workaround for now I don't block when opening the dialog, immediately returning an Err(Error:Null) in get_file_dialog_path and I have a closure that runs with the actual result but I'm not sure where to send it. If a solution is decided upon I can take a shot at a PR.

Contributor guide

Tech stack
rust
Domain
desktop
Issue type
bug
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.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
Rust borrowing fundamentalsdruid shell basics
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
30
Research direction
The issue describes a conflict between file dialog blocking and timer events due to mutable borrow on WinHandler. The comment references issue #95 which may have a solution. The contributor could investigate #95 and propose a non blocking approach, such as using channels or callbacks. The workaround mentioned (immediately returning Err and using a closure) could be a starting point. Files to examine include the druid shell hello example and the get file dialog path method.