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Assume I produce several figures in my program. I want to give the user the option of printing them all at once. I do not want to show the print dialog for every page. Therefore, I am displaying it only once and for the first figure only. This is the solution that I have come up with so far:

figHandles = get(0, 'Children');
for currFig = 1:length(figHandles)
    if(currFig == 1)
        printdlg(figHandles(currFig)); % Shows the print dialog for the first figure
    else
        print(figHandles(currFig)); % Does not show the print dialog and uses the latest printer selection
    end
end

But the problem is, if the user cancels the print for the first figure, there is no way that I can catch it and cancel the other prints. How should I achieve that?

Matin Kh
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  • Based on the sources of one of the old Matlabs - not sure that it can return anything, because it uses `eval` for printing. – Cheery Oct 09 '14 at 17:42
  • Quite an interesting question, but may be you should modify the title to also show that you want to retrieve the status of a print job. – Hoki Oct 09 '14 at 19:31

1 Answers1

1

Ok this one is a pretty dirty trick and there is definitely no guaranty it will work for all versions. It does work for me on Matlab 2013a / win 7.

To get Matlab to return a value as to whether it executed a print job or not, you need to insert a small hack into the print.m function.

Hacking print.m

  • Locate the print.m function. It should be in your matlab installation folders around ..\toolbox\matlab\graphics\print.m.

  • Once located, make a backup copy! (this trick is minor and shouldn't break anything but we never know).

  • open the file print.m and locate the line LocalPrint(pj);, it should be near or at the end of the main function (~line 240 for me).

  • Replace the line by:

. 

pj = LocalPrint(pj); %// Add output to the call to LocalPrint
if (nargout == 1)
    varargout{1} = pj ; %// transfer this output to the output of the `print` function
end
  • Save the file.

Done for the hack. Now every time you are calling the print function, you can have a return argument full of information.

Applied to your case:

First, notice that on windows machines, the printdlg function is equivalent to call the print function with the '-v' argument.
So printdlg(figHandle) is exactly the same as print('-v',figHandle). (the '-v' stands for verbose). We are going to use that.

The output of the print function is going to be a structure (let's call it pj) with many fields. The field you want to check to know if the print command was actually executed is pj.Return. 

pj.return == 0 => job cancelled
pj.return == 1 => job sent to printer

So in your case, after the tweak on the print.m, it could look like this:

pj = print('-v',figHandles(1)); %// Shows the print dialog for the first figure
if pj.Return %//if the first figure was actually printed (and not cancelled)
    for currFig = 2:length(figHandles)
        print(figHandles(currFig)); %// Does not show the print dialog and uses the latest printer selection
    end
end

Note: The pj structure contains many more reusable informations, including the print job options, the current selected printers etc ...

Hoki
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