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function info = GetTouchDeviceInfo(deviceIndex)
% info = GetTouchDeviceInfo(deviceIndex)
%
% Return 'info' a struct with info about the specified touch input device
% 'deviceIndex'. 'info' has the following fields:
%
% 'product', 'serialNumber' and 'locationID' Self explanatory.
%
% 'maxTouchpoints' The maximum number of simultaneously supported touch
% points on the device. 10 is a quite common number for typical touchscreens.
%
% 'touchDeviceType': 0 = Touchpad, 1 = Touchscreen.
%
% 'valuatorInfos': A struct array. Each slot contains info about the meaning,
% parameter range and resolution of the corresponding value in the Valuators
% vector returned as part of touch events. i'th slot == i'th vector entry.
% This is mostly for use with GetTouchValuators() to map raw valuator values
% into something meaningful.
%
% WINDOWS: ________________________________________________________________________
%
% This function currently returns nothing, as touch devices aren't yet
% supported.
%
% OS X: ___________________________________________________________________________
%
% This function currently returns nothing, as OSX does not support touch
% screens in a meaningful way as far as we know. And Psychtoolbox for OSX
% currently does not implement any special support for touchpads or such.
%
% _________________________________________________________________________________
% see also: GetTouchDeviceIndices, GetTouchValuators, TouchEventGet
% HISTORY
% 03-Oct-2017 mk Wrote it.
touchIndices=[];
productNames=cell(0);
allInfo=cell(0);
if nargin < 1 || isempty(deviceIndex)
error('Required deviceIndex missing.');
end
if ~ismember(deviceIndex, GetTouchDeviceIndices)
error('Provided deviceIndex is not a touch input device.');
end
% Get info from PsychHID Devices:
[idx, ~, allinfos] = GetTouchDeviceIndices;
i = find(idx == deviceIndex);
allinfos = allinfos{i};
info.touchDeviceType = allinfos.touchDeviceType;
info.maxTouchpoints = allinfos.maxTouchpoints;
info.product = allinfos.product;
info.serialNumber = allinfos.serialNumber;
info.locationID = allinfos.locationID;
% Get info about the different valuators:
if IsLinux
[~, ~, ~, ~, ~, info.valuatorInfos] = GetMouse([], deviceIndex);
else
info.valuatorInfos = [];
end
return;
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