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defaultUpdateFcn.m
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Tue, Feb 18, 23:39

defaultUpdateFcn.m
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function defaultUpdateFcn(hThis,~,~)
% DEFAULTUPDATEFCN Default cursorbar UpdateFcn.
%
% 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 2003-2016 The MathWorks, Inc.
% Change Log:
% 13 Feb 2015: First version posted on the MathWorks file exchange.
% 14 May 2015: Added logarithmic scale support.
hText = get(hThis,'DisplayHandle');
if strcmp(hThis.ShowText,'off') || strcmp(hThis.Visible,'off')
if ~isempty(hText)
delete(hText);
hThis.DisplayHandle = gobjects(0);
return
end
return
end
% get the locations of the markers
if ~all(isvalid(hThis.TargetMarkerHandle))
return;
end
xData = get(hThis.TargetMarkerHandle,'XData');
yData = get(hThis.TargetMarkerHandle,'YData');
numIntersections = length(xData);
% get the handles for the text objects, corresponding to each intersection
hAxes = get(hThis,'Parent');
%%%%%%%%%%%%%
AXCOLOR = get(hAxes,'Color');
if ischar(AXCOLOR), AXCOLOR = get(hAxes,'Color'); end
% light colored axes
if sum(AXCOLOR)>1.5
TEXTCOLOR = [0,0,0]; FACECOLOR = [1 1 238/255]; EDGECOLOR = [.8 .8 .8];
% dark colored axes (i.e. simulink scopes)
else
TEXTCOLOR = [.8 .8 .6]; FACECOLOR = 48/255*[1 1 1]; EDGECOLOR = [.8 .8 .6];
end
%%%%%%%%%%%%%
% create text objects if necessary
if isempty(hText) || any(~ishandle(hText))
hText = gobjects(numIntersections,1);
for n = 1:numIntersections
hText(n) = text(xData(n),yData(n),'',...
'Parent',hThis.GroupHandle, ... % 'Parent',hAxes,...
'Color',TEXTCOLOR,...
'EdgeColor',EDGECOLOR,...
'BackgroundColor',FACECOLOR,...
'Visible','off');
end
numText = numIntersections;
else
% if the number of intersections isn't equal to the number of text objects,
% add/delete them as necessary
set(hText,'Visible','off');
numText = length(hText);
if numText ~= numIntersections
% unequal number of text objects and intersections
delete(hText)
hText = gobjects(numIntersections,1);
for n = numIntersections: -1 : 1
hText(n) = text(xData(n),yData(n),'',...
'Parent',hThis.GroupHandle, ... % 'Parent',hAxes,...
'Color',TEXTCOLOR,...
'EdgeColor',EDGECOLOR,...
'BackgroundColor',FACECOLOR,...
'Visible','off');
end
numText = numIntersections;
end
end
% now update the text objects
set(hText,'Visible','off','Units','data')
xl = get(hAxes,'XLim');
yl = get(hAxes,'YLim');
xdir = get(hAxes,'XDir');
ydir = get(hAxes,'YDir');
pixperdata = getPixelsPerData(hThis);
pixoffset = 12;
for n = 1:numText
x = xData(n);
y = yData(n);
if x >= mean(xl)
if strcmp(xdir,'normal')
halign = 'right';
xoffset = -pixoffset * 1/pixperdata(1);
else
halign = 'left';
xoffset = pixoffset * 1/pixperdata(1);
end
else
if strcmp(xdir,'normal')
halign = 'left';
xoffset = pixoffset * 1/pixperdata(1);
else
halign = 'right';
xoffset = -pixoffset * 1/pixperdata(1);
end
end
if y >= mean(yl)
if strcmp(ydir,'normal')
valign = 'top';
yoffset = -pixoffset * 1/pixperdata(2);
else
valign = 'bottom';
yoffset = pixoffset * 1/pixperdata(2);
end
else
if strcmp(ydir,'normal')
valign = 'bottom';
yoffset = pixoffset * 1/pixperdata(2);
else
valign = 'top';
yoffset = -pixoffset * 1/pixperdata(2);
end
end
if ~isempty( hThis.TargetZData )
[~,ind] = min( hypot(hThis.TargetXData-x, hThis.TargetYData-y) );
ind = ind(1);
z = hThis.TargetZData(ind);
else
z = [];
end
% assert proper scale
switch [hAxes.XScale '-' hAxes.YScale]
case 'linear-linear'
posoffset = [x+xoffset, y+yoffset, 0];
case 'log-linear'
posoffset = [x*10^xoffset, y+yoffset, 0];
case 'linear-log'
posoffset = [x+xoffset, y*10^yoffset, 0];
case 'log-log'
posoffset = [x*10^xoffset, y*10^yoffset, 0];
end
set(hText(n),'Position',posoffset,...
'String',makeString(x,y,z,hThis.Orientation,hThis.TextDescription),...
'HorizontalAlignment',halign,...
'VerticalAlignment',valign);
end
set(hThis,'DisplayHandle',hText);
set(hText,'Visible','on');
% --------------------------------------
function str = makeString(x,y,z,orient,desc)
% MAKESTRING Make the text description string
frmt = '%.3g';
switch desc
case 'short'
switch orient
case 'vertical'
str = ['Y: ' sprintf(frmt,y)];
case 'horizontal'
str = ['X: ' sprintf(frmt,x)];
end
case 'long'
if isempty(z)
str = { ['X: ' sprintf(frmt,x)] , ['Y: ' sprintf(frmt,y)]};
else
str = { ['X: ' sprintf(frmt,x)] , ['Y: ' sprintf(frmt,y)] , ['Z: ' sprintf(frmt,z)]};
end
end

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