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DragValue: when keyboard editing, only update the value on focus lost #2688

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merged 5 commits into from
Feb 8, 2023
Merged

DragValue: when keyboard editing, only update the value on focus lost #2688

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826bc89
test
harrisonmg Feb 7, 2023
29b6308
moved some accesskit stuff
harrisonmg Feb 7, 2023
92be531
reverted accesskit change
harrisonmg Feb 7, 2023
cce435d
Add explanatory comment
emilk Feb 8, 2023
2b0b278
fmt
emilk Feb 8, 2023
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18 changes: 11 additions & 7 deletions crates/egui/src/widgets/drag_value.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -475,13 +475,17 @@ impl<'a> Widget for DragValue<'a> {
.desired_width(ui.spacing().interact_size.x)
.font(text_style),
);
let parsed_value = match custom_parser {
Some(parser) => parser(&value_text),
None => value_text.parse().ok(),
};
if let Some(parsed_value) = parsed_value {
let parsed_value = clamp_to_range(parsed_value, clamp_range.clone());
set(&mut get_set_value, parsed_value);
// Only update the value when the user presses enter, or clicks elsewhere. NOT every frame.
// See https://github.com/emilk/egui/issues/2687
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if response.lost_focus() {
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It would be nice if you also added a comment justifying why this check should be done. The fact that it was absent before allows us to conclude that it is not self evident. Description of the reasons why this check was added and what it affects will make it easier to resolve problems if this change leads to them.

A good tone will also leave a link to the GitHub Issue, where you can get more information.

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let parsed_value = match custom_parser {
Some(parser) => parser(&value_text),
None => value_text.parse().ok(),
};
if let Some(parsed_value) = parsed_value {
let parsed_value = clamp_to_range(parsed_value, clamp_range.clone());
set(&mut get_set_value, parsed_value);
}
}
ui.memory_mut(|mem| mem.drag_value.edit_string = Some(value_text));
response
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