Mercurial > octave
view examples/code/oct_demo.cc @ 31238:67cad4e8f866
Include graphics objects with hidden handles in axes limit calculation (bug #63095).
* libinterp/corefcn/graphics.cc (get_children_limits): Get handles to all axes
children including those with hidden handle visibility. Add BIST.
* libinterp/corefcn/graphics.in.h (text::update_position): Do not automatically
change "zliminclude" property. Axes labels are implemented as text objects, and
we don't want their extent to be included in the axis limit calculation.
author | Markus Mützel <markus.muetzel@gmx.de> |
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date | Sat, 24 Sep 2022 11:57:44 +0200 |
parents | 22ee68edcf3a |
children |
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// oct_demo.cc -- example of a dynamically linked function for Octave. // To compile this file, type the command // // mkoctfile oct_demo.cc // // from within Octave or from the shell prompt. This will create a file // called oct_demo.oct that can be loaded by Octave. To test the // oct_demo.oct file, start Octave and type the command // // oct_demo ("easy as", 1, 2, 3) // // at the Octave prompt. Octave should respond by printing // // Hello, world! // easy as // 1 // 2 // 3 // ans = 3 // Additional samples of real dynamically loaded functions are available in // the files of the libinterp/dldfcn directory of the Octave distribution. // See also the chapter External Code Interface in the documentation. #include <iostream> #include <octave/oct.h> // Every user function should include <octave/oct.h> which imports the // basic set of Octave header files required. In particular this will define // the DEFUN_DLD macro (defun-dld.h) which is used for every user function // that is visible to Octave. // The four arguments to the DEFUN_DLD macro are: // 1) The function name as seen in Octave. // 2) The variable to hold any inputs (of type octave_value_list) // 3) The number of output arguments // 4) A string to use as help text if 'help <function_name>' is entered. // // Note below that the third parameter (nargout) of DEFUN_DLD is not used. DEFUN_DLD (oct_demo, args, /* nargout */, "[...] = oct_demo (...)\n\ \n\ Print a greeting followed by the values of all input arguments.\n\ \n\ Return all arguments in reverse order.") { // The inputs to this are available in the variable named args. int nargin = args.length (); // The list of values to return. See the declaration in ovl.h. octave_value_list retval; // This stream is normally connected to the pager. octave_stdout << "Hello, world!\n"; // The octave_value_list class is a zero-based array of octave_value objects. // The declaration for the octave_value class is in the file ov.h. // The print() method will send its output to octave_stdout, // so it will also end up going through the pager. for (int i = 0; i < nargin; i++) { octave_value tmp = args(i); tmp.print (octave_stdout); retval(nargin-i-1) = tmp; } return retval; }