slint/internal/compiler/widgets/material-base/widget-combobox.slint

// Copyright © SixtyFPS GmbH <info@slint-ui.com>
// SPDX-License-Identifier: GPL-3.0-only OR LicenseRef-Slint-commercial


import { md } from "md.slint";
import { Item } from "widget-item.slint";

export component ComboBox {
    in property <[string]> model;
    in-out property <int> current-index : 0;
    in-out property <string> current-value: root.model[root.current-index];
    callback selected(string);
    out property has-focus <=> fs.has-focus;
    in property enabled <=> fs.enabled;

    accessible-role: combobox;
    accessible-value <=> root.current-value;

    horizontal-stretch: 1;
    vertical-stretch: 0;
    min-width: 160px;
    height: 56px;

    forward-focus: fs;

    fs := FocusScope {
        key-pressed(event) => {
            if (event.text == Key.UpArrow) {
                root.current-index = Math.max(root.current-index - 1, 0);
                root.current-value = root.model[root.current-index];
                return accept;
            } else if (event.text == Key.DownArrow) {
                root.current-index = Math.min(root.current-index + 1, root.model.length - 1);
                root.current-value = root.model[root.current-index];
                return accept;
            }
            return reject;
        }
    }


    container := Rectangle {
        width: 100%;
        height: 100%;
        border-radius: 4px;
        border-width: 1px;
        border-color: md.sys.color.outline;
    }

    layout := HorizontalLayout {
        padding-left: 16px;
        padding-right: 12px;
        spacing: 16px;

        label := Text {
            text <=> root.current-value;
            height: 100%;
            color: md.sys.color.on-surface;
            vertical-alignment: center;
            // FIXME after Roboto font can be loaded
            // font-family: md.sys.typescale.body-large.font;
            font-size: md.sys.typescale.body-large.size;
            font-weight: md.sys.typescale.body-large.weight;
        }

        icon := Path {
            width: 16px;
            height: 16px;
            y: (parent.height - self.height) / 2;
            commands: "m24 30.75-12-12 2.15-2.15L24 26.5l9.85-9.85L36 18.8Z";
            fill: md.sys.color.on-surface;
        }
    }

    touch := TouchArea {
        enabled <=> root.enabled;
        clicked => {
            root.focus();
            popup.show();
        }
    }

    popup := PopupWindow {
        x:0;
        y: root.height;
        width: root.width;

        popup-container := Rectangle {
            background: md.sys.color.surface;
            drop-shadow-color: md.sys.color.shadow;
            drop-shadow-blur: md.sys.elevation.level2;
            drop-shadow-offset-y: 1px;
            border-radius: 4px;
        }

        VerticalLayout {
            for value[idx] in root.model: Item {
                text: value;
                selected: idx == root.current-index;
                clicked => {
                    if (root.enabled) {
                        root.current-index = idx;
                        root.current-value = value;
                        root.selected(root.current-value);
                    }
                }
            }
        }
    }

    states [
        disabled when !root.enabled : {
            container.border-color: md.sys.color.on-surface;
            container.opacity: 0.38;
            label.opacity: 0.38;
            icon.opacity: 0.38;
        }
        focused when root.has-focus : {
            container.border-width: 2px;
            container.border-color: md.sys.color.primary;
            label.color: md.sys.color.primary;
            icon.fill: md.sys.color.primary;
        }
    ]
}