ImageBox exmaples

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import matplotlib.pyplot as plt
import numpy as np
from mpl_visual_context.image_box import ImageBox, ColorBox


def plot_gradient():
    fig, axs_ = plt.subplots(2, 2, num=1, clear=True)
    axs = axs_.flat

    ib = ImageBox("up", alpha="left", extent=(0, 0, 1, 1), coords="data")
    axs[0].add_artist(ib)

    z = np.arange(100).reshape((10, 10))
    ib = ImageBox(z, alpha="left", extent=(0, 0, 1, 1), coords="data")
    axs[1].add_artist(ib)

    z = np.zeros((10, 10, 3))
    z[:, :, 0] = np.arange(100).reshape((10, 10)) / 100.0
    ib = ImageBox(z, alpha="left", extent=(0, 0, 1, 1), coords="data")
    axs[2].add_artist(ib)

    ib = ColorBox("r", alpha="up", shape=(10, 10), extent=(0, 0, 1, 1), coords="data")
    axs[3].add_artist(ib)


def plot_extent():
    fig, axs_ = plt.subplots(2, 2, num=2, clear=True, layout="constrained")
    axs = axs_.flat

    ax = axs[0]
    ib = ImageBox("up", alpha="left", extent=(0.2, 0.2, 0.8, 0.8), coords="data")
    ax.add_artist(ib)
    ax.set_title("coords = 'data'")

    ax = axs[1]
    ib = ImageBox(
        "up", alpha="left", extent=(0.2, 0.2, 0.8, 0.8), coords="axes fraction"
    )
    ax.add_artist(ib)
    ax.set(xlim=(0, 10), ylim=(0, 10))
    ax.set_title("coords = 'axes fraction'")

    ax = axs[2]
    a = ax.annotate("Matplotlib", (0.5, 0.5), va="center", ha="center", fontsize=20)
    ib = ImageBox("right", alpha=0.4, extent=(0, 0, 1, 1), coords=a)
    ax.add_artist(ib)
    ax.set_title("coords = artist")

    ax = axs[3]
    a = ax.annotate("Matplotlib", (0.5, 0.5), va="center", ha="center", fontsize=20)
    ib = ImageBox(
        "right",
        alpha=0.4,
        extent=(0, 0.0 - 0.2, 1, 1.0 + 0.2),
        coords=("axes fraction", a),
    )
    ax.set_title("coords = ('axes fraction', artist)")
    ax.add_artist(ib)


if __name__ == '__main__':
    plot_gradient()
    plot_extent()

    plt.show()