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
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146

use geom::{Polygon, Pt2D};

use crate::{
    include_labeled_bytes, text, Button, EdgeInsets, EventCtx, GeomBatch, GfxCtx, Line, Outcome,
    ScreenDims, ScreenPt, ScreenRectangle, StyledButtons, Text, Widget, WidgetImpl, WidgetOutput,
};

// TODO MAX_CHAR_WIDTH is a hardcoded nonsense value
const TEXT_WIDTH: f64 = 2.0 * text::MAX_CHAR_WIDTH;

// TODO Allow text entry
// TODO Allow click and hold
// TODO Grey out the buttons when we're maxed out
pub struct Spinner {
    low: isize,
    high: isize,
    pub current: isize,

    up: Button,
    down: Button,

    top_left: ScreenPt,
    dims: ScreenDims,
}

impl Spinner {
    pub fn new(ctx: &EventCtx, (low, high): (isize, isize), mut current: isize) -> Widget {
        let button_builder = ctx
            .style()
            .btn_plain_light()
            .padding(EdgeInsets {
                top: 2.0,
                bottom: 2.0,
                left: 4.0,
                right: 4.0,
            })
            .image_dims(17.0);

        let up = button_builder
            .clone()
            .image_bytes(include_labeled_bytes!("../../icons/arrow_up.svg"))
            .build(ctx, "increase value");

        let down = button_builder
            .image_bytes(include_labeled_bytes!("../../icons/arrow_down.svg"))
            .build(ctx, "decrease value");

        let dims = ScreenDims::new(
            TEXT_WIDTH + up.get_dims().width,
            up.get_dims().height + down.get_dims().height + 1.0,
        );
        if current < low {
            current = low;
            warn!("Spinner current value is out of bounds!");
        } else if high < current {
            current = high;
            warn!("Spinner current value is out of bounds!");
        }
        Widget::new(Box::new(Spinner {
            low,
            high,
            current,

            up,
            down,

            top_left: ScreenPt::new(0.0, 0.0),
            dims,
        }))
    }

    pub fn modify(&mut self, delta: isize) {
        self.current += delta;
        self.current = self.current.min(self.high);
        self.current = self.current.max(self.low);
    }
}

impl WidgetImpl for Spinner {
    fn get_dims(&self) -> ScreenDims {
        self.dims
    }

    fn set_pos(&mut self, top_left: ScreenPt) {
        // TODO This works, but it'd be kind of cool if we could construct a tiny little Panel
        // here and use that. Wait, why can't we? ...
        self.top_left = top_left;
        self.up
            .set_pos(ScreenPt::new(top_left.x + TEXT_WIDTH, top_left.y));
        self.down.set_pos(ScreenPt::new(
            top_left.x + TEXT_WIDTH,
            top_left.y + self.up.get_dims().height,
        ));
    }

    fn event(&mut self, ctx: &mut EventCtx, output: &mut WidgetOutput) {
        self.up.event(ctx, output);
        if let Outcome::Clicked(_) = output.outcome {
            output.outcome = Outcome::Changed;
            self.current = (self.current + 1).min(self.high);
            ctx.no_op_event(true, |ctx| self.up.event(ctx, output));
            return;
        }

        self.down.event(ctx, output);
        if let Outcome::Clicked(_) = output.outcome {
            output.outcome = Outcome::Changed;
            self.current = (self.current - 1).max(self.low);
            ctx.no_op_event(true, |ctx| self.down.event(ctx, output));
            return;
        }

        if let Some(pt) = ctx.canvas.get_cursor_in_screen_space() {
            if ScreenRectangle::top_left(self.top_left, self.dims).contains(pt) {
                if let Some((_, dy)) = ctx.input.get_mouse_scroll() {
                    if dy > 0.0 && self.current != self.high {
                        self.current += 1;
                        output.outcome = Outcome::Changed;
                    }
                    if dy < 0.0 && self.current != self.low {
                        self.current -= 1;
                        output.outcome = Outcome::Changed;
                    }
                }
            }
        }
    }

    fn draw(&self, g: &mut GfxCtx) {
        // TODO Cache
        let mut batch = GeomBatch::from(vec![(
            text::BG_COLOR,
            Polygon::rounded_rectangle(self.dims.width, self.dims.height, 5.0),
        )]);
        batch.append(
            Text::from(Line(self.current.to_string()))
                .render_autocropped(g)
                .centered_on(Pt2D::new(TEXT_WIDTH / 2.0, self.dims.height / 2.0)),
        );
        let draw = g.upload(batch);
        g.redraw_at(self.top_left, &draw);

        self.up.draw(g);
        self.down.draw(g);
    }
}