Delphi's layout system is an absolute layout system where you anchor controls to a fixed distance from any edge. If you anchor a control to the right edge, it will change its x coordinate when the container resizes. When you anchor a control to both edges, it will keep both its x coordinate and its distance from the right edge.

I am having issues translating this to Ext.

Take a look at this example form:

In the middle row the "Valid From" and "Valid Until" date fields are anchored only to the right edge, so they will not resize, only change their x position. The "Customer" field however is anchored to both edges, so it will resize.

Any suggestions on how I can realize such a layout cleanly?