slint/examples/todo-mvc/ui/widgets/state_layer.slint

// Copyright © SixtyFPS GmbH <info@slint.dev>
// SPDX-License-Identifier: MIT

import { TodoPalette, AnimationSettings } from "styling.slint";

export component StateLayer {
    // styling
    in property <length> border-radius <=> state-layer.border-radius;

    // states
    in property <bool> pressed;
    in property <bool> has-hover;
    in property <bool> has-focus;
    in property <length> focus-padding: 2px;
    
    focus-border := Rectangle {
        x: (root.width - self.width) / 2;
        y: (root.height - self.height) / 2;
        width: root.width + 2 * root.focus-padding;
        height: root.height + 2 * root.focus-padding;
        border-radius: state-layer.border-radius + root.focus-padding;
        border-width: 1px;
        border-color: TodoPalette.focus-border;
        opacity: 0;

        states [
            focused when root.has-focus : {
                opacity: 1;
            }
        ]

        animate opacity {
            duration: AnimationSettings.color-duration;
        }
    }
    
    state-layer := Rectangle {
        width: 100%;
        height: 100%;

        animate background {
            duration: AnimationSettings.color-duration;
        }
    }

    states [
        pressed when root.pressed : {
            state-layer.background: TodoPalette.state-pressed;
        }
        hoverd when root.has-hover: {
            state-layer.background: TodoPalette.state-hovered;
        }
    ]
}