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0ed68a56b7
This patch changes both the Input::Session interface and the skeleton
for the server-side implementation of this interface
('input/component.h').
The Input::Session interface offers a new 'sigh' function, which can be
called be the client to register a signal handler. The signal handler
gets notified on the arrival of new input. This alleviates the need to
poll for input events at the client side.
The server-side skeleton for implementing input services underwent a
redesign to make it more modular and robust. I.e., there are no
global functions needed at the server side and the event-queue
enable/disable mechanism is implemented at a central place (in the root
component) rather than inside each driver.
Fixes #46
Liquid frame buffer is an implementation of the frame buffer interface running as a client of the Nitpicker GUI server. It supports the following configuration options. The example shows the default values. ! <config ! ! <!-- enable the animated background, ! valid values are 'on' and 'off' --> ! animate="on" ! ! <!-- the initial window position and ! size of the virtual frame buffer --> ! xpos="400" ! ypos="270" ! width="500" ! height="400" ! ! <!-- set the window title --> ! title="Liquid Framebuffer" ! ! <!-- show a resize handle, ! valid values are 'on' and 'off' --> ! resize_handle="off" ! ! <!-- show window decoration (title bar and borders), ! valid values are 'on' and 'off' --> ! decoration="on" ! ! /> Because Liquid frame buffer creates the virtual frame-buffer window at start time, not at session-creation time, sufficient memory resources must be provided when starting the program. Consequently, the client does not need to donate memory for the frame buffer backing store. Liquid frame buffer supports only one client. If multiple virtual frame buffers are needed, multiple instances of the program should be used.