Window stack models for multi-screen displays

A multi-screen device comprising:

• two displays;
• a memory;
• a processor in communication with the memory and each of the two displays, the processor operable to:
• receive activation of a window in the multi-screen device;
• determine at least one of the displays of the multi-screen device associated with the active window;
• determine a position in a window stack for the active window, wherein the active window is displayed on at least one of displays of the multi-screen device;
• and
• after determining the window stack position and associated display of the active window, generate a logic data structure for the active window to describe the position of the active window in the window stack, wherein the window stack is an arrangement of a desktop and at least one other window displayed in at least one of the displays.

A method for creating a window stack in a multi-screen device, the method comprising:

• a processor executing a framework, a desktop, and an Application Manager;
• the desktop providing at least one icon representing an application;
• the framework receiving a gesture to activate the application;
• the framework determining at least a portion of a composite display to render an active window associated with the application, wherein the composite display includes display areas for the two or more displays of the multi-screen device;
• determining a display identifier for the active window;
• determining a position in the window stack for the active window;
• and
• generating a logic data structure for the active window to describe the position of the active window in the window stack, wherein the logic data structure includes the display identifier and the position in the window stack.