grx 0.3.2

Abstraction layer for UI development
Documentation 
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
147
148
149
150
151
152
153
154
155
156
157
158

// SPDX-License-Identifier: GPL-3.0-or-later

//! The switch component

use super::gtk_props::apply;
use crate::{handlers::Handler, new_gc, Interactable};
use glib::prelude::Cast;
use grx_macros::{gtk_component, props};
use gtk::glib;
use gtk::{
    prelude::{AdjustmentExt, EditableExt, WidgetExt},
    Adjustment,
};
use std::rc::Rc;

#[props]
#[derive(Default)]
pub struct Props {
    pub on_change: Option<Handler<SpinButton>>,
    pub lower: f64,
    pub upper: f64,
    pub value: f64,
    pub step: f64,
    pub page: f64,
    pub value_mapper: Option<Mapper>,
}

impl std::fmt::Debug for Props {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        f.debug_struct("Props")
            .field("id", &self.id)
            .field("classes", &self.classes)
            .field("styles", &self.styles)
            .field("children", &self.children)
            .field("on_change", &self.on_change.is_some())
            .field("lower", &self.lower)
            .field("upper", &self.upper)
            .field("value", &self.value)
            .field("step", &self.step)
            .field("page", &self.page)
            .field("value_mapper", &self.value_mapper.is_some())
            .finish()
    }
}

type Mapper = (
    Rc<dyn Fn(f64) -> String + 'static>,
    Rc<dyn Fn(String) -> Option<f64> + 'static>,
);

pub fn spin_button(mut props: Props) -> Rc<SpinButton> {
    let switch = gtk::SpinButton::builder().build();
    let sw = switch.clone();

    let value_mapper = props.value_mapper.take();
    let on_change = props.on_change.take();

    let lower = props.lower;
    let upper = props.upper;
    let step = props.step;
    let page = props.page;

    let switch = new_gc!(SpinButton { switch, props });

    let adj = Adjustment::builder()
        .lower(lower)
        .upper(upper)
        .step_increment(step)
        .page_increment(page)
        .build();

    sw.set_adjustment(&adj);

    if let Some((to, from)) = value_mapper {
        sw.connect_output(move |sb| {
            let value = sb.value();
            sb.set_text(&to(value));
            glib::Propagation::Proceed
        });
        sw.connect_input(move |sb| {
            let text = sb.text().to_string();
            from(text).map(Ok)
        });
    }

    sw.set_value(switch.props.value);

    apply(switch.clone());

    if let Some(onchange) = on_change {
        let btn = switch.clone();
        let onc = onchange.clone();
        adj.connect_value_changed(move |_| {
            onc(btn.clone());
        });
    }

    switch
}

#[gtk_component(gtk::SpinButton)]
#[derive(Debug)]
pub struct SpinButton {}

impl SpinButton {
    pub fn has_focus(self: &Rc<Self>) -> bool {
        let mut focus = self.widget.has_focus();
        let mut c = self.widget.first_child();
        while let Some(child) = c {
            focus |= child.has_focus();
            c = child.next_sibling();
        }
        focus
    }
    pub fn set_value(self: &Rc<Self>, value: f64) {
        self.widget.set_value(value);
    }
    pub fn value(self: &Rc<Self>) -> f64 {
        self.widget.adjustment().value()
    }
    pub fn upper(self: &Rc<Self>) -> f64 {
        self.widget.adjustment().upper()
    }
    pub fn lower(self: &Rc<Self>) -> f64 {
        self.widget.adjustment().lower()
    }
    pub fn step(self: &Rc<Self>) -> f64 {
        self.widget.adjustment().step_increment()
    }
    pub fn page(self: &Rc<Self>) -> f64 {
        self.widget.adjustment().page_increment()
    }
}

impl Interactable for SpinButton {
    #[allow(unused_variables)]
    fn on_click(self: &Rc<Self>, handler: impl Fn(&Rc<Self>) + 'static) {
        // ignore
    }

    #[allow(unused_variables)]
    fn on_change(self: &Rc<Self>, handler: impl Fn(&Rc<Self>) + 'static) {
        let s = self.clone();
        self.widget.adjustment().connect_value_changed(move |_| {
            handler(&s);
        });
    }

    #[allow(unused_variables)]
    fn on_swipe(self: &Rc<Self>, handler: impl Fn(&Rc<Self>, f64, f64) + 'static) {
        // optional
    }

    #[allow(unused_variables)]
    fn on_blur(self: &Rc<Self>, handler: impl Fn(&Rc<Self>) + 'static) {
        // optional
    }
}