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Add on_create to handle and on_edit_end to textbox
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| Original file line number | Diff line number | Diff line change |
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@@ -57,3 +57,6 @@ pub use self::image::*; | |
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| mod menu; | ||
| pub use menu::*; | ||
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| mod value_slider; | ||
| pub use value_slider::*; | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,184 @@ | ||
| use std::marker::PhantomData; | ||
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| use crate::{ | ||
| Binding, Context, Element, Handle, Lens, LensExt, Model, MouseButton, | ||
| Units::*, View, WindowEvent, ZStack, Color, Label, Modifiers, Event, Textbox, Actions | ||
| }; | ||
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| use super::textbox::TextEvent; | ||
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| #[derive(Lens)] | ||
| pub struct VSDataInternal { | ||
| edit: bool, | ||
| } | ||
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| pub enum ValueSliderEvent { | ||
| SetEdit(bool), | ||
| OnSubmit(f32), | ||
| } | ||
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| impl Model for VSDataInternal { | ||
| fn event(&mut self, _cx: &mut Context, event: &mut Event) { | ||
| if let Some(value_slider_event) = event.message.downcast() { | ||
| match value_slider_event { | ||
| ValueSliderEvent::SetEdit(flag) => { | ||
| self.edit = *flag; | ||
| } | ||
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| _=> {} | ||
| } | ||
| } | ||
| } | ||
| } | ||
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| pub struct ValueSlider<L> { | ||
| p: PhantomData<L>, | ||
| is_dragging: bool, | ||
| on_changing: Option<Box<dyn Fn(&mut Context, f32)>>, | ||
| } | ||
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| impl<L> ValueSlider<L> | ||
| where | ||
| L: Lens<Target = f32>, | ||
| { | ||
| pub fn new(cx: &mut Context, lens: L) -> Handle<Self> { | ||
| Self { | ||
| p: PhantomData::default(), | ||
| is_dragging: false, | ||
| on_changing: None, | ||
| }.build2(cx, |cx|{ | ||
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| VSDataInternal { | ||
| edit: false, | ||
| }.build(cx); | ||
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| ZStack::new(cx, |cx|{ | ||
| Element::new(cx) | ||
| .height(Stretch(1.0)) | ||
| .width(Stretch(1.0)) | ||
| .background_color(Color::rgb(200, 200, 200)) | ||
| .bind(lens.clone(), move |handle, l|{ | ||
| let val = *l.get(handle.cx); | ||
| handle.width(Percentage(val * 100.0)); | ||
| }); | ||
| Binding::new(cx, VSDataInternal::edit, move |cx, edit|{ | ||
| if *edit.get(cx) { | ||
| Textbox::new(cx, lens.clone().map(|val| format!("{:.2}", val))) | ||
| .on_create(|cx|{ | ||
| cx.emit(TextEvent::StartEdit); | ||
| cx.emit(TextEvent::SelectAll); | ||
| }) | ||
| .on_submit(|cx, txt|{ | ||
| if let Ok(val) = txt.parse::<f32>() { | ||
| let val = val.clamp(0.0, 1.0); | ||
| cx.emit(ValueSliderEvent::OnSubmit(val)); | ||
| } | ||
| }) | ||
| .on_edit_end(|cx|{ | ||
| cx.emit(ValueSliderEvent::SetEdit(false)); | ||
| }) | ||
| .child_space(Stretch(1.0)) | ||
| .height(Stretch(1.0)) | ||
| .width(Stretch(1.0)); | ||
| } else { | ||
| Label::new(cx, lens.clone().map(|val| format!("{:.2}", val))) | ||
| .child_space(Stretch(1.0)) | ||
| .height(Stretch(1.0)) | ||
| .width(Stretch(1.0)) | ||
| .hoverable(false); | ||
| }; | ||
| }); | ||
| }); | ||
| }) | ||
| } | ||
| } | ||
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| impl<L> View for ValueSlider<L> | ||
| where | ||
| L: Lens<Target = f32>, | ||
| { | ||
| fn event(&mut self, cx: &mut Context, event: &mut Event) { | ||
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| if let Some(value_slider_event) = event.message.downcast() { | ||
| match value_slider_event { | ||
| ValueSliderEvent::OnSubmit(val) => { | ||
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| if let Some(callback) = &self.on_changing { | ||
| (callback)(cx, *val); | ||
| } | ||
| } | ||
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| _=> {} | ||
| } | ||
| } | ||
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| if let Some(window_event) = event.message.downcast() { | ||
| match window_event { | ||
| WindowEvent::MouseDown(button) if *button == MouseButton::Left => { | ||
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| if cx.modifiers.contains(Modifiers::ALT) { | ||
| cx.emit(ValueSliderEvent::SetEdit(true)); | ||
| } else { | ||
| if let Some(vs_data) = cx.data::<VSDataInternal>() { | ||
| if !vs_data.edit { | ||
| self.is_dragging = true; | ||
| cx.capture(); | ||
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| let mut dx = (cx.mouse.left.pos_down.0 | ||
| - cx.cache.get_posx(cx.current)) | ||
| / cx.cache.get_width(cx.current); | ||
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| dx = dx.clamp(0.0, 1.0); | ||
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| if let Some(callback) = self.on_changing.take() { | ||
| (callback)(cx, dx); | ||
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| self.on_changing = Some(callback); | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
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| WindowEvent::MouseUp(button) if *button == MouseButton::Left => { | ||
| self.is_dragging = false; | ||
| cx.release(); | ||
| } | ||
|
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| WindowEvent::MouseMove(x, _) => { | ||
| if self.is_dragging { | ||
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| let mut dx = (*x - cx.cache.get_posx(cx.current)) | ||
| / cx.cache.get_width(cx.current); | ||
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| dx = dx.clamp(0.0, 1.0); | ||
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| if let Some(callback) = &self.on_changing { | ||
| (callback)(cx, dx); | ||
| } | ||
| } | ||
| } | ||
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| _=> {} | ||
| } | ||
| } | ||
| } | ||
| } | ||
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| impl<'a, L> Handle<'a, ValueSlider<L>> | ||
| where | ||
| L: Lens<Target = f32>, | ||
| { | ||
| pub fn on_changing<F>(self, callback: F) -> Self | ||
| where | ||
| F: 'static + Fn(&mut Context, f32), | ||
| { | ||
| if let Some(slider) = | ||
| self.cx.views.get_mut(&self.entity).and_then(|f| f.downcast_mut::<ValueSlider<L>>()) | ||
| { | ||
| slider.on_changing = Some(Box::new(callback)); | ||
| } | ||
|
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| self | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,37 @@ | ||
| use vizia::*; | ||
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| #[derive(Lens)] | ||
| pub struct AppData { | ||
| val: f32, | ||
| } | ||
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| pub enum AppEvent { | ||
| SetValue(f32), | ||
| } | ||
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| impl Model for AppData { | ||
| fn event(&mut self, _cx: &mut Context, event: &mut Event) { | ||
| if let Some(app_event) = event.message.downcast() { | ||
| match app_event { | ||
| AppEvent::SetValue(val) => { | ||
| self.val = *val; | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
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| fn main() { | ||
| let mut window_description = WindowDescription::new(); | ||
| Application::new(window_description, |cx| { | ||
| AppData { val: 0.5 }.build(cx); | ||
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| ValueSlider::new(cx, AppData::val) | ||
| .on_changing(|cx, val| cx.emit(AppEvent::SetValue(val))) | ||
| .width(Pixels(300.0)) | ||
| .height(Pixels(50.0)) | ||
| .space(Stretch(1.0)); | ||
| }) | ||
| .run(); | ||
| } |