#158 Dialog: Support minimizing a dialog to Frame like a Desktop

[Joshua Gertzen]

Per this forum discussion: https://sourceforge.net/forum/message.php?msg_id=4553161 it has been suggested that the framework should have support for optionally minimizing Dialogs to the Frame, thus providing a behavior similar to a Desktop environment. At the very least, there should be support for controlling what buttons appear in the title bar. For instance, you might want to hide/disable the "X" (close) button, and show/enable a "-" (minimize) button. Of course for those buttons to be 100% useful, you'd need a way to control what happens when they are clicked.

[JWF]

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I would also like to a see a "maximize/restore" dialog option as well as the capability to allow any combination of close, maximize/restore, or minimize. See the following to clarify what features I am requesting:

http://demo.qooxdoo.org/current/showcase/#InternalWindow

[Thomas Smith]

I just finished checking this into the trunk. More work can be done to improve the way that it looks, but it seems to work pretty sweet.