slint/tests/cases/input/scroll-event.slint

// Copyright © SixtyFPS GmbH <info@slint.dev>
// SPDX-License-Identifier: GPL-3.0-only OR LicenseRef-Slint-Royalty-free-2.0 OR LicenseRef-Slint-Software-3.0


export component TestCase inherits Window {
    width: 500px;
    height: 500px;
    in-out property<string> result;
    f := Flickable {
        viewport_width: 2100px;
        viewport_height: 2100px;
        ta1 := TouchArea {
            x: 20px;
            y: 20px;
            width: 50px;
            height: 50px;
            Rectangle { background: red; }
            scroll-event(e) => {
                result += "ta1{" + e.delta-x/1px + "," + e.delta-y/1px + " at " + self.mouse-x/1px + "," + self.mouse-y/1px + "}";
                accept
            }
        }

        ta2 := TouchArea {
            x: 120px;
            y: 20px;
            width: 50px;
            height: 50px;
            Rectangle { background: green; }
            scroll-event(e) => {
                result += "ta2{" + e.delta-x/1px + "," + e.delta-y/1px + " at " + self.mouse-x/1px + "," + self.mouse-y/1px + "}";
                EventResult.reject
            }
        }
    }


    out property<length> offset_x: -f.viewport_x;
    out property<length> offset_y: -f.viewport_y;
}

/*


```rust
// Test wheel events
use slint::{LogicalPosition, platform::WindowEvent };
let instance = TestCase::new().unwrap();

instance.window().dispatch_event(WindowEvent::PointerScrolled { position: LogicalPosition::new(25.0, 30.0), delta_x: -3.0, delta_y: -50.0 });
assert_eq!(instance.get_result(), "ta1{-3,-50 at 5,10}");
assert_eq!(instance.get_offset_y(), 0.0);
assert_eq!(instance.get_offset_x(), 0.0);

instance.set_result("".into());

instance.window().dispatch_event(WindowEvent::PointerScrolled { position: LogicalPosition::new(155.0, 50.0), delta_x: -30.0, delta_y: -50.0 });
assert_eq!(instance.get_result(), "ta2{-30,-50 at 35,30}");
assert_eq!(instance.get_offset_x(), 30.0);
assert_eq!(instance.get_offset_y(), 50.0);
```

*/