Absolute position
From Documentation
This documentation is for an older version of ZK. For the latest one, please click here.
By setting window's left, top, mode="overlapped", you can layout window by absolute position. Then, you can put component inside window.
Following is a example:
<window>
<button label="ok" width="300px" height="300px" />
<window left="200px" top="200px" mode="overlapped">
<button label="ok" />
</window>
</window>
Currently only window support mode="overlapped".