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createNewDataCursor.m
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Sun, Dec 1, 20:53

createNewDataCursor.m
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function hNewDataCursor = createNewDataCursor(hThis,hTarget)
% CREATENEWDATACURSOR Creates a new data cursor
%
% Thanks to <a href="http://www.mathworks.com/matlabcentral/profile/authors/3354683-yaroslav">Yaroslav Don</a> for his assistance in updating cursorbar for
% MATLAB Graphics and for his contribution of new functionality.
% Copyright 2015-2016 The MathWorks, Inc.
% set source
if nargin<2
hTarget = hThis.Target(1);
end
% create a Data Cursor
if isTargetAxes(hThis)
% target is an axes: create a dummy line handle
hDummyLineHandle = line(0,0, 'Parent', hThis.GroupHandle, ...
'Visible','off', 'HandleVisibility','off', 'Clipping','off',...
'PickableParts','none', 'HitTest','off', 'Interruptible','off');
hThis.DataCursorDummyTargetHandle = matlab.graphics.chart.primitive.Line(hDummyLineHandle);
%
hNewDataCursor = matlab.graphics.shape.internal.PointDataCursor(hThis.DataCursorDummyTargetHandle);
elseif isTargetChart(hThis)
% target is a chart: create a direct point data cursor
try % create directly
hNewDataCursor = matlab.graphics.shape.internal.PointDataCursor( hTarget );
catch % probably, not a DataAnnotatable (matlab.graphics.chart.interaction.DataAnnotatable)
try % create via datacursormode
hDataCursorMode = datacursormode();
hDataTip = hDataCursorMode.createDatatip( hTarget );
%
hNewDataCursor = hDataTip.Cursor;
%
delete(hDataTip); % it's services are no longer required
hDataCursorMode.Enable = 'off'; % disable data cursor mode
catch % throw error
error(message('MATLAB:cursorbar:InvalidTarget'));
end
end
else
% throw error
error(message('MATLAB:cursorbar:InvalidTarget'));
end
% delete old handle
hOldDataCursor = hThis.DataCursorHandle;
delete(hOldDataCursor);
% update old handle
hThis.DataCursorHandle = hNewDataCursor;

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