1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130

use geom::Polygon;

use crate::{
    Button, ButtonBuilder, Choice, Color, ControlState, Dropdown, EventCtx, GeomBatch, GfxCtx,
    JustDraw, MultiKey, Outcome, ScreenDims, ScreenPt, Widget, WidgetImpl, WidgetOutput,
};

// TODO Radio buttons in the menu
pub struct PersistentSplit<T: Clone + PartialEq> {
    current_value: T,
    btn: Button,
    spacer: JustDraw,
    dropdown: Dropdown<T>,
}

impl<T: 'static + PartialEq + Clone + std::fmt::Debug> PersistentSplit<T> {
    pub fn widget<MK: Into<Option<MultiKey>>>(
        ctx: &EventCtx,
        label: &str,
        default_value: T,
        hotkey: MK,
        choices: Vec<Choice<T>>,
    ) -> Widget {
        let outline = ctx.style().btn_outline.outline;
        Widget::new(Box::new(PersistentSplit::new(
            ctx,
            label,
            default_value,
            hotkey,
            choices,
        )))
        .outline(outline)
        .named(label)
    }

    pub fn new<MK: Into<Option<MultiKey>>>(
        ctx: &EventCtx,
        label: &str,
        default_value: T,
        hotkey: MK,
        choices: Vec<Choice<T>>,
    ) -> PersistentSplit<T> {
        let dropdown = Dropdown::new(ctx, "change", default_value, choices, true);
        let mut btn = button_builder(ctx).label_text(dropdown.current_value_label());

        if let Some(multikey) = hotkey.into() {
            btn = btn.hotkey(multikey)
        }
        let btn = btn.build(ctx, label);

        let outline_style = &ctx.style().btn_outline;
        let (_, outline_color) = outline_style.outline;

        PersistentSplit {
            current_value: dropdown.current_value(),
            spacer: JustDraw::wrap(
                ctx,
                GeomBatch::from(vec![(
                    outline_color,
                    Polygon::rectangle(3.0, btn.get_dims().height),
                )]),
            )
            .take_just_draw(),
            btn,
            dropdown,
        }
    }
}

fn button_builder<'a, 'c>(ctx: &EventCtx) -> ButtonBuilder<'a, 'c> {
    ctx.style()
        .btn_plain
        .btn()
        .outline((0.0, Color::CLEAR), ControlState::Default)
}

impl<T: 'static + PartialEq + Clone> PersistentSplit<T> {
    pub fn current_value(&self) -> T {
        self.current_value.clone()
    }
}

impl<T: 'static + Clone + PartialEq> WidgetImpl for PersistentSplit<T> {
    fn get_dims(&self) -> ScreenDims {
        let dims1 = self.btn.get_dims();
        let dims2 = self.spacer.get_dims();
        let dims3 = self.dropdown.get_dims();
        ScreenDims::new(
            dims1.width + dims2.width + dims3.width,
            dims1.height.max(dims2.height).max(dims3.height),
        )
    }

    fn set_pos(&mut self, top_left: ScreenPt) {
        self.btn.set_pos(top_left);
        self.spacer
            .set_pos(ScreenPt::new(top_left.x + self.btn.dims.width, top_left.y));
        self.dropdown.set_pos(ScreenPt::new(
            top_left.x + self.btn.dims.width + self.spacer.get_dims().width,
            top_left.y,
        ));
    }

    fn event(&mut self, ctx: &mut EventCtx, output: &mut WidgetOutput) {
        self.btn.event(ctx, output);
        if let Outcome::Clicked(_) = output.outcome {
            return;
        }

        self.dropdown.event(ctx, &mut WidgetOutput::new());
        let new_value = self.dropdown.current_value();
        if new_value != self.current_value {
            self.current_value = new_value;
            let label = self.btn.action.clone();
            let mut button_builder =
                button_builder(ctx).label_text(self.dropdown.current_value_label());
            if let Some(multikey) = self.btn.hotkey.take() {
                button_builder = button_builder.hotkey(multikey)
            }
            self.btn = button_builder.build(ctx, &label);
            output.redo_layout = true;
        }
    }

    fn draw(&self, g: &mut GfxCtx) {
        self.btn.draw(g);
        self.spacer.draw(g);
        self.dropdown.draw(g);
    }
}