Hello, I have an idea what could be implemented in Ubuntu to have a much more better experience in presenting things with a computer.
The current situation is quite horrible I think. Not only in Ubuntu, but in all (known to me) operating systems. There is a quite sophisticated support for dual screen mode these times, when one is *working* on both screens. I will call this dual screen mode as "working mode". But in fact, very few (in terms of percentage) people are using two screens in "working mode". Maybe developers use the "working mode" a bit more than ordinary users, but not much. Much more people are using the second screen for presenting. By presenting I meen everything when one wants to share something with a group of other people. It means beamer presentations, movie watching or anything else. When one is using the second screen for presentations, I will call it as "presentation mode". The biggest mistake in the current operating systems behavior is the assumption that dualscreen working mode is equal to presentation mode. I think, that for a good presenting experience, it is completely necessary to distinguish between these two modes in the OS. There are some crucial differences: * Typically, the presenter cannot look simultaneously on both screens. The "working screen" is more accessible for the presenter. Therefore it gives no sense to have any controls on the "presenting screen". It gives even no sense to have normal windows on the presenting screen. For example, I really *don't like* the situation, when I plug the display cable into my laptop and compiz will move one half of the opened windows to the presenting screen. I have to chase them on a screen which I almost don't see and move them back. Arggghhhh!:-) Yes, maybe it is configurable somewhere, but I think nobody wants his windows to move from a working screen to a presentation screen. Therefore it should be automatic. (but of course, if my second screen would be a working one, than I would like moving half of the windows to the second screen) * The presenter wants to have a full control what should be visible on the presentation screen. In the "working mode", it is absolutely not possible. When I want to present the content of some window, I have to drag it, move on the presentation screen and then fullscreen the window. When I am watching a presentation, I can say, that such a moving of the windows is really ugly. * There is no geometric relation between the presentation screen and the primary working screen. It is not above, it is not below, it is not left of and it is not right of the primary screen. This typicaly confuses the presenter when trying to do something with the mouse pointer. Therefore, I am looking for some implementation of the "presentation mode". I also think, that I am not alone. Presentation mode would be much more frequently used than working mode. I have also an idea, how the presentation mode should work: * There should be a possibility to setup if the secondary screen should be a presentation screen or working screen. When I plug a screen into my computer, it will become a presentation or working screen depending on this setting. Laptop default would be presentation screen, desktop default would be working screen. * When a screen becomes a working screen, it will have the same behavior as in the current dualscreen implementation. * When a screen becomes a presentation screen, it will have a completely different behavior: Nothing will appear on the screen, no controls, no icons, just black. Alternatively, somebody could set the background of the screen. But I think, there should be no relation between the background of the working screen and the background of the presentation screen. * Crossing one and only one edge of the working screen with the mouse pointer to reach the presentation screen is not a good idea. As I already wrote, there is no geometrical relation between the working (main) screen and the presenting screen. * All windows are appearing only on the working screen, the presentation screen is still completely empty. * But every window gets a new power. It may be switched in a presentation mode. Only one window at a time may be in presentation mode. Therefore, switching window B to presentation mode should disable the presentatnion mode of window A. I was thinking about to add a fourth button in the window to the three: close, maximize, minimize. But there are even other possibilities. * There could be even a possibility to switch the whole desktop in the presenting mode. Then it could act like the mirroring mode. * When an window is in presentation mode, it should *not* disappear from the working screen. It should be replicated pixel by pixel to the presentation screen instead. On the presentation screen it should appear just centered and without decoration. * There should be also a possiblility how an application could tell the OS, that the content displayed on the presentation screen is different from that one displayed on the working screen. * An application has then these two possibilities: 1. it supports presentation mode - then it is able to render anything in the presentation window 2. it does not support presentation mode - then the OS will replicate the content of the window pixel by pixel. * The support for presenting mode should be also available when only one screen is available (for example PC connected to a data projector). Then it should act a bit differently, but consistent with the previous dualscreen situation. I know, that developing such a functionality would not be easy at all, but could be really interesting. What do you think about such an idea? Best regards Marek Sterzik
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