Object-Oriented PHP

What Does a Designer Do?

To determine what the DirectoryItems class should do, consider how web designers create thumbnail images. They typically open an image file in a graphic editor, reduce its dimensions (and perhaps its quality), and then resave the file under a different name.

For ease of placement on the screen, images in a group are usually reduced to approximately the same thumbnail size as each other. In other words, the thumbnail for a large image is roughly the same size as the thumbnail for a medium-sized image. The image is typically reduced to a predetermined maximum dimension while constraining its proportions so as not to distort it. This maximum dimension is usually applied to the width or the height, depending upon whether ...