How to Automatically Resize a JavaFX Canvas to Fill Its Parent Container?

Automatically Resizing Canvas to Fill Parent

JavaFX offers user interfaces with dynamic content, which often requires an approach to resize UI elements automatically when the parent container changes size. This is particularly necessary for graphical content, such as canvases used for animations.

To ensure automatic resizing, it is essential to override the layoutChildren() method in a custom Pane that wraps the canvas. This override adjusts the canvas size to match the enclosing Pane. However, it is important to note that Canvas returns false for isResizable(), preventing the parent from resizing it during layout. Likewise, Pane does not perform layout beyond resizing resizable children to their preferred sizes.

Therefore, the dimensions used to construct the canvas become its initial size. This approach is exemplified in the CanvasPane class, similar to the one in the Ensemble particle simulation.

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