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use std::cell::{Cell, RefCell}; use std::sync::Arc; use cell::{CheckSet, CloneCell}; use event::Event; use point::Point; use rect::Rect; use thickness::Thickness; use theme::Selector; use traits::{Click, Place, Style, Text}; use widgets::{HorizontalPlacement, VerticalPlacement, Widget}; use primitives::Rectangle; use primitives::TextWidget; const BUTTON_SELECTOR: &str = "button"; pub struct Button { pub rect: Cell<Rect>, local_position: Cell<Point>, vertical_placement: Cell<VerticalPlacement>, horizontal_placement: Cell<HorizontalPlacement>, margin: Cell<Thickness>, children: RefCell<Vec<Arc<Widget>>>, pub selector: CloneCell<Selector>, pub text: CloneCell<String>, pub text_offset: Cell<Point>, click_callback: RefCell<Option<Arc<Fn(&Button, Point)>>>, hover: Cell<bool>, pressed: Cell<bool>, } impl Button { pub fn new() -> Arc<Self> { let selector = CloneCell::new(Selector::new(Some(BUTTON_SELECTOR))); let inner_text = CloneCell::new(String::new()); let text_widget = TextWidget::new(); text_widget.inner_text().bind(&inner_text); text_widget.selector().bind(&selector); text_widget.placement(VerticalPlacement::Center, HorizontalPlacement::Center); let background = Rectangle::new(); background.selector().bind(&selector); background.placement(VerticalPlacement::Stretch, HorizontalPlacement::Stretch); background.add(text_widget); Arc::new(Button { rect: Cell::new(Rect::new(0, 0, 0, 28)), local_position: Cell::new(Point::new(0, 0)), vertical_placement: Cell::new(VerticalPlacement::Absolute), horizontal_placement: Cell::new(HorizontalPlacement::Absolute), margin: Cell::new(Thickness::default()), children: RefCell::new(vec![background]), selector, text: inner_text, text_offset: Cell::new(Point::new(6, 6)), click_callback: RefCell::new(None), hover: Cell::new(false), pressed: Cell::new(false), }) } fn adjust_size(&self) { self.size( self.text.get().len() as u32 * 8 + 2 * self.text_offset.get().x as u32, 16 + 2 * self.text_offset.get().y as u32, ); } } impl Click for Button { fn emit_click(&self, point: Point) { if let Some(ref click_callback) = *self.click_callback.borrow() { click_callback(self, point); } } fn on_click<T: Fn(&Self, Point) + 'static>(&self, func: T) -> &Self { *self.click_callback.borrow_mut() = Some(Arc::new(func)); self } } impl Place for Button {} impl Text for Button { fn text<S: Into<String>>(&self, text: S) -> &Self { self.text.set(text.into()); self.adjust_size(); self } fn text_offset(&self, x: i32, y: i32) -> &Self { self.text_offset.set(Point::new(x, y)); self.adjust_size(); self } } impl Style for Button { fn selector(&self) -> &CloneCell<Selector> { &self.selector } } impl Widget for Button { fn name(&self) -> &str { "Button" } fn rect(&self) -> &Cell<Rect> { &self.rect } fn vertical_placement(&self) -> &Cell<VerticalPlacement> { &self.vertical_placement } fn horizontal_placement(&self) -> &Cell<HorizontalPlacement> { &self.horizontal_placement } fn margin(&self) -> &Cell<Thickness> { &self.margin } fn local_position(&self) -> &Cell<Point> { &self.local_position } fn update(&self) { let mut selector = Selector::new(Some(BUTTON_SELECTOR)).with_pseudo_class( if self.pressed.get() { "active" } else { "inactive" } ); if self.hover.get() { selector = selector.with_pseudo_class("hover"); } self.selector().set(selector); } fn event(&self, event: Event, focused: bool, redraw: &mut bool, caught: &mut bool) -> bool { match event { Event::Mouse { point, left_button, .. } => { let mut click = false; let rect = self.rect.get(); if rect.contains(point) { if self.hover.check_set(true) { *redraw = true; } if left_button { if self.pressed.check_set(true) { *redraw = true; } } else { if self.pressed.check_set(false) { click = true; *redraw = true; } } *caught = true; } else { if self.hover.check_set(false) { *redraw = true; } if self.pressed.check_set(false) { *redraw = true; } } if click { let click_point: Point = point - rect.point(); self.emit_click(click_point); } } _ => (), } focused } fn children(&self) -> &RefCell<Vec<Arc<Widget>>> { &self.children } }