osuframework - DrawSizePreservingFillContainer

The DrawSizePreservingFillContainer is a container class in the osu!framework that preserves the size of the drawn content while filling up available space. It is mainly used for drawing textures and UI elements like buttons, sliders and progress bars.

How it works

The DrawSizePreservingFillContainer works by first drawing its child elements at their natural size, and then scaling them up or down as needed to fill the available space. This ensures that the aspect ratio and content of the child elements are preserved, while still fitting the container to its parent element.

Usage

To use the DrawSizePreservingFillContainer, simply add it to your UI hierarchy and set its child element to the content you want to draw. You can also set properties like FillMode to control how the container should fill up available space.

Here's an example of creating a DrawSizePreservingFillContainer and adding an image as content:

var container = new DrawSizePreservingFillContainer()
{
    FillMode = FillMode.Fit,
};
container.Child = new Sprite
{
    Texture = Texture.FromFile("image.png"),
};

In this example, FillMode.Fit is used to ensure that the content is scaled down as needed to fit inside the container. You can also use FillMode.Fill to scale up the content as much as possible while still preserving its aspect ratio.

Conclusion

The DrawSizePreservingFillContainer is a powerful container class in the osu!framework that makes it easy to draw content while preserving its size and aspect ratio. By using it in your UI elements, you can ensure that your user interface looks great on screens of any size or resolution.