I want matlab to show me a full screen, all black, and to be able to set pixels on it.
Is it even possible?
You can't totally do that using pure MATLAB code. On Windows, I tried different combinations, but the taskbar will still be on top (the one with the Start button):
%# 1)
sz = get(0, 'ScreenSize');
figure('Menubar','none', 'WindowStyle','modal', ...
'Units','pixels', 'Position', [0 0 sz(3) sz(4)])
%# 2)
figure('Menubar','none', 'Units','normalized', 'Position',[0 0 1 1])
%# 3)
hFig = figure('Menubar','none', 'Units','normalized', 'Position',[0 0 1 1]);
set(hFig, 'Units','pixels')
p = get(hFig, 'Position');
set(hFig, 'Position', [1 31 p(3) p(4)-8]);
You would have to write a MEX function and call the the Win32 API directly. Fortunately, there should be existing submissions on FEX implementing such functionality.
Here is an example of creating a full screen figure, and drawing points with the mouse. I am using the WindowAPI solution by Jan Simon
%# open fullscreen figure
hFig = figure('Menubar','none');
WindowAPI(hFig, 'Position','full');
%# setup axis
axes('Color','k', 'XLim',[0 1], 'YLim',[0 1], ...
'Units','normalized', 'Position',[0 0 1 1], ...
'ButtonDownFcn',@onClick)
The callback function:
function onClick(hObj,ev)
%# draw point
p = get(hObj,'CurrentPoint');
line(p(1,1), p(1,2), 'Color','r', 'LineStyle','none', ...
'Marker','.', 'MarkerSize',40, 'Parent',hObj)
end
Check out psychophysics toolbox. It does exactly what you are looking for and more.
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