obsqrbtz/egui_knob
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fix: knob size

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This commit is contained in:
Daniel Dada
2025-02-03 15:50:55 +03:00
parent b20a393479
commit 6a49e6f961
1 changed files with 20 additions and 9 deletions
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29
src/lib.rs
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@@ -81,7 +81,7 @@ impl<'a> Knob<'a> {
impl Widget for Knob<'_> { impl Widget for Knob<'_> {
fn ui(self, ui: &mut Ui) -> Response { fn ui(self, ui: &mut Ui) -> Response {
let desired_size = Vec2::splat(self.size); let knob_size = Vec2::splat(self.size);
let label_size = if let Some(label) = &self.label { let label_size = if let Some(label) = &self.label {
let font_id = egui::FontId::proportional(self.font_size); let font_id = egui::FontId::proportional(self.font_size);
@@ -97,8 +97,17 @@ impl Widget for Knob<'_> {
Vec2::ZERO Vec2::ZERO
}; };
// Adjust desired size to include label space let label_padding = 12.0;
let adjusted_size = Vec2::new(desired_size.x, desired_size.y + label_size.y + 12.0); // 12.0 is an offset for spacing
let adjusted_size = match self.label_position {
LabelPosition::Top | LabelPosition::Bottom => {
Vec2::new(knob_size.x, knob_size.y + label_size.y + label_padding)
}
LabelPosition::Left | LabelPosition::Right => {
Vec2::new(knob_size.x + label_size.x + label_padding, knob_size.y)
}
};
let (rect, response) = ui.allocate_exact_size(adjusted_size, Sense::drag()); let (rect, response) = ui.allocate_exact_size(adjusted_size, Sense::drag());
if response.dragged() { if response.dragged() {
@@ -110,7 +119,7 @@ impl Widget for Knob<'_> {
let painter = ui.painter(); let painter = ui.painter();
let center = rect.center(); let center = rect.center();
let radius = rect.width() / 2.0; let radius = knob_size.x / 2.0;
let angle = (*self.value - self.min) / (self.max - self.min) * std::f32::consts::PI * 1.5 let angle = (*self.value - self.min) / (self.max - self.min) * std::f32::consts::PI * 1.5
- std::f32::consts::PI; - std::f32::consts::PI;
@@ -147,19 +156,21 @@ impl Widget for Knob<'_> {
) )
.size(); .size();
let label_offset = 12.0; let label_offset = label_padding;
let label_pos = match self.label_position { let label_pos = match self.label_position {
LabelPosition::Top => { LabelPosition::Top => {
center + Vec2::new(-text_size.x / 2.0, -radius - label_offset - text_size.y) rect.center()
+ Vec2::new(-text_size.x / 2.0, -radius - label_offset - text_size.y)
} }
LabelPosition::Bottom => { LabelPosition::Bottom => {
center + Vec2::new(-text_size.x / 2.0, radius + label_offset) rect.center() + Vec2::new(-text_size.x / 2.0, radius + label_offset)
} }
LabelPosition::Left => { LabelPosition::Left => {
center + Vec2::new(-radius - label_offset - text_size.x, -text_size.y / 2.0) rect.center()
+ Vec2::new(-radius - label_offset - text_size.x, -text_size.y / 2.0)
} }
LabelPosition::Right => { LabelPosition::Right => {
center + Vec2::new(radius + label_offset, -text_size.y / 2.0) rect.center() + Vec2::new(radius + label_offset, -text_size.y / 2.0)
} }
}; };