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import gradio as gr
from pathlib import Path

dir_ = Path(__file__).parent

def predict(im):
    return im

with gr.Blocks() as demo:
    with gr.Row():
        im = gr.ImageEditor(
            type="numpy",
            interactive=True,
        )
        im_preview = gr.ImageEditor(
            interactive=True,
        )

    set_background = gr.Button("Set Background")
    set_background.click(
        lambda: {
            "background": str(dir_ / "cheetah.jpg"),
            "layers": None,
            "composite": None,
        },
        None,
        im,
        show_progress="hidden",
    )
    set_layers = gr.Button("Set Layers")
    set_layers.click(
        lambda: {
            "background": str(dir_ / "cheetah.jpg"),
            "layers": [str(dir_ / "layer1.png")],
            "composite": None,
        },
        None,
        im,
        show_progress="hidden",
    )
    set_composite = gr.Button("Set Composite")
    set_composite.click(
        lambda: {
            "background": None,
            "layers": None,
            "composite": "https://nationalzoo.si.edu/sites/default/files/animals/cheetah-003.jpg",
        },
        None,
        im,
        show_progress="hidden",
    )

    im.change(
        predict,
        outputs=im_preview,
        inputs=im,
    )

    gr.Examples(
        examples=[
            "https://upload.wikimedia.org/wikipedia/commons/0/09/TheCheethcat.jpg",
            {
                "background": str(dir_ / "cheetah.jpg"),
                "layers": [str(dir_ / "layer1.png")],
                "composite": None,
            },
        ],
        inputs=im,
    )

if __name__ == "__main__":
    demo.launch()