Redo portions of file editor to use more signals/slots rather than casting. * file-editor-tab.cc, file-editor-tab.h (file_editor_tab::~file_editor_tab): Add. Delete lexer to prevent memory leak. Delete _edit_area to prevent memory leak. (file_editor_tab::conditional_close): Add. Simple slot that uses QWidget pointer as unique ID, not for function call. (file_editor_tab::file_name_query): Add. Simple slot that signals file name to whomever is connected. (file_editor_tab::find, file_editor_tab : public QWidget): Removed use of exec() and keep a pointer to the find_dialog as a member. Toggle hide()/show() via a connected slot to toggle visibility as desired. * file-editor.cc, file-editor.h, file-editor-tab.cc file-editor-tab.h (file_editor : public file_editor_interface, file_editor_tab : public QWidget, file_editor_tab::file_editor_tab, file_editor_tab::closeEvent, file_editor_tab::load_file, file_editor_tab::new_file, file_editor_tab::run_file): Remove _file_editor pointer member from file_editor_tab and rid file_editor::get_main_window from file_editor. There should be no need for such information about higher-level hierarchy inside lower-level objects. (file_editor::request_open_file, file_editor_tab::open_file): Move QFileDialog to file_editor::request_open_file and delete file_editor_tab::open_file since most of the remaining functionality is in file_editor_tab::load_file. (file_editor::active_editor_tab): Deleted. (file_editor::fetab_change_request, file_editor_tab::change_editor_state): Added to initiate a request for the editor tab to change focus. (file_editor_tab::editor_state_changed): Added arguments to pass the copy status and the directory path so that editor doesn't have to call functions for such information. (file_editor::handle_editor_state_changed): Add copying directory of the file_editor_tab to the current editing directory. (file_editor::check_conflict_save, file_editor_tab::editor_check_conflict_save, file_editor_tab::save_file_as, file_editor_tab::handle_save_file_as_answer): Moved a portion of the save-file-as dialog mechanism to the file_editor where all file names can be obtained to check for conflict with already open files. The new signal indicates to the editor that a name check be done, and in turn the editor signals the tab to save the file. * main-window.cc, file-editor.cc, file-editor.h, file-editor-interface.h (file_editor::terminal, file_editor : public file_editor_interface, file_editor_interface : public QDockWidget): Since file_editor_tab no longer looks up to main_window, remove _main_window and _terminal from file_editor and file_editor_interface, as well as file_editor::terminal. * file-editor-tab.cc (file_editor_tab::file_has_changed): Make the dialog boxes non-modal and use slots to handle user answers. (file_editor_tab::closeEvent): Remove portion that accesses upper hierarchy member functions, can find better approaches. (file_editor_tab::file_editor_tab): Make there no parent for QsciScintilla so that window modality can be set to individual editor. * file-editor-tab.cc, file-editor.cc (file_editor_tab::load_file): Use show() member rather than exec() and set modality to window so that rest of application may function. Return a QString with message rather than a boolean. * file-editor-tab.cc, (file_editor_tab::file_has_changed): Remove static variable alreadyAsking. Multiple file_editor_tabs are using this code so do not want to block recognition of multiple file having changed on disk (bug #37406). Instead, simply stop tracking via the file watcher. (file_editor_tab::save_file, file_editor_tab::save_file_as, file_editor_tab::handle_save_file_as_answer, file_editor_tab::handle_save_file_as_answer_close): Added a remove_on_success variable. Changed the QFileDialog to WindowModal and created slots to handle file selected signal and finished signal. Signal/slot connects vary based upon remove_on_success setting. (file_editor_tab::check_file_modified): Changed the QFileDialog to NonModal and attach some slots. Editor tab can't be parent in case deleted, so use read-only state of the editor area. * file-editor-tab.h (file_editor_tab : public QWidget): New signals for file_editor for tab and file name management. (file_editor_tab::get_file_name): Delete. * file-editor.h (file_editor : public file_editor_interface): Make QStringList sessionFileNames a member of file_editor so that it can retain data between file_editor_tab signals. Also can be used for checking precense of filenames and prevent opening multiple copies (bug #36869) Added signals for file editor tabs--settings_changed, fetab_close_request, and query_file_name. Three new slots for tab and file name management. * file-editor-interface.h, file-editor.h (file_editor_interface::add_file_editor_tab, file_editor::add_file_editor_tab): Made the text name for the tab an input variable. * file-editor.cc (file_editor::~file_editor): Replace dynamic_cast with simple signal querying all file editor tabs for file names which end up in savedSessionTabs. (file_editor::handle_file_name_changed): Dynamic cast not necessary since QObject and QWidget are compatible. (file_editor::handle_tab_close_request): Replace dynamic_cast with signal to request file_editor_tab with associated tabID tag should close. (file_editor::handle_tab_remove_request): Rename of handle_tab_close_request. Instead of dynamic cast, loop through pointers comparing QWidget* to QObject*, if same tag remove tab via index and also delete which fixes a memory leak. (file_editor::handle_add_filename_to_list): Simple slot that uses append() of the list member functions. (file_editor::notice_settings): Rather than dynamic cast, emit signal for the file_editor_tabs. (file_editor::add_file_editor_tab): New variety of connections for improved flow. (file_editor::request_open_file): Given error messages are made WindowModal, the tab shouldn't be delete if file open is not successful. The file_editor_tab takes care of that. (file_editor::request_open_file): Added check and message box for the requested file already open in editor. For the non-interactive overloaded version, open a message dialog box to tell the user file not found, e.g., could not find file in the settings when launched. (file_editor::request_open_file): Inquire file names and update list before checking for existence of files. Supply empty title to editor tab then have file_editor_tab update name. * file-editor-tab.h, file-editor-tab.cc, file-editor.cc (file_editor_tab::run_file): New signal process_octave_code. (file_editor::add_file_editor_tab): Connect signal process_octave_code to file_editor's parent's slot handle_command_double_clicked.

## Copyright (C) 2000-2012 Teemu Ikonen
##
## This file is part of Octave.
##
## Octave is free software; you can redistribute it and/or modify it
## under the terms of the GNU General Public License as published by
## the Free Software Foundation; either version 3 of the License, or (at
## your option) any later version.
##
## Octave is distributed in the hope that it will be useful, but
## WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
## General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with Octave; see the file COPYING.  If not, see
## <http://www.gnu.org/licenses/>.

## -*- texinfo -*-
## @deftypefn {Function File} {} errorbar (@var{args})
## This function produces two-dimensional plots with errorbars.  Many
## different combinations of arguments are possible.  The simplest form is
##
## @example
## errorbar (@var{y}, @var{ey})
## @end example
##
## @noindent
## where the first argument is taken as the set of @var{y} coordinates
## and the second argument @var{ey} is taken as the errors of the
## @var{y} values.  @var{x} coordinates are taken to be the indices
## of the elements, starting with 1.
##
## If more than two arguments are given, they are interpreted as
##
## @example
## errorbar (@var{x}, @var{y}, @dots{}, @var{fmt}, @dots{})
## @end example
##
## @noindent
## where after @var{x} and @var{y} there can be up to four error
## parameters such as @var{ey}, @var{ex}, @var{ly}, @var{uy}, etc.,
## depending on the plot type.  Any number of argument sets may appear,
## as long as they are separated with a format string @var{fmt}.
##
## If @var{y} is a matrix, @var{x} and error parameters must also be matrices
## having same dimensions.  The columns of @var{y} are plotted versus the
## corresponding columns of @var{x} and errorbars are drawn from
## the corresponding columns of error parameters.
##
## If @var{fmt} is missing, yerrorbars ("~") plot style is assumed.
##
## If the @var{fmt} argument is supplied, it is interpreted as in
## normal plots.  In addition, @var{fmt} may include an errorbar style
## which must precede the line and marker format.  The following plot
## styles are supported by errorbar:
##
## @table @samp
## @item ~
## Set yerrorbars plot style (default).
##
## @item >
## Set xerrorbars plot style.
##
## @item ~>
## Set xyerrorbars plot style.
##
## @item #
## Set boxes plot style.
##
## @item #~
## Set boxerrorbars plot style.
##
## @item #~>
## Set boxxyerrorbars plot style.
## @end table
##
## Examples:
##
## @example
## errorbar (@var{x}, @var{y}, @var{ex}, ">")
## @end example
##
## @noindent
## produces an xerrorbar plot of @var{y} versus @var{x} with @var{x}
## errorbars drawn from @var{x}-@var{ex} to @var{x}+@var{ex}.
##
## @example
## @group
## errorbar (@var{x}, @var{y1}, @var{ey}, "~",
##           @var{x}, @var{y2}, @var{ly}, @var{uy})
## @end group
## @end example
##
## @noindent
## produces yerrorbar plots with @var{y1} and @var{y2} versus @var{x}.
## Errorbars for @var{y1} are drawn from @var{y1}-@var{ey} to
## @var{y1}+@var{ey}, errorbars for @var{y2} from @var{y2}-@var{ly} to
## @var{y2}+@var{uy}.
##
## @example
## @group
## errorbar (@var{x}, @var{y}, @var{lx}, @var{ux},
##           @var{ly}, @var{uy}, "~>")
## @end group
## @end example
##
## @noindent
## produces an xyerrorbar plot of @var{y} versus @var{x} in which
## @var{x} errorbars are drawn from @var{x}-@var{lx} to @var{x}+@var{ux}
## and @var{y} errorbars from @var{y}-@var{ly} to @var{y}+@var{uy}.
## @seealso{semilogxerr, semilogyerr, loglogerr}
## @end deftypefn

## Created: 18.7.2000
## Author: Teemu Ikonen <tpikonen@pcu.helsinki.fi>
## Keywords: errorbar, plotting

function retval = errorbar (varargin)

  [h, varargin] = __plt_get_axis_arg__ ("errorbar", varargin{:});

  oldh = gca ();
  unwind_protect
    axes (h);
    newplot ();

    tmp = __errcomm__ ("errorbar", h, varargin{:});

    if (nargout > 0)
      retval = tmp;
    endif
  unwind_protect_cleanup
    axes (oldh);
  end_unwind_protect

endfunction


%!demo
%! clf;
%! rand_1x11_data1 = [0.82712, 0.50325, 0.35613, 0.77089, 0.20474, 0.69160, 0.30858, 0.88225, 0.35187, 0.14168, 0.54270];
%! rand_1x11_data2 = [0.506375, 0.330106, 0.017982, 0.859270, 0.140641, 0.327839, 0.275886, 0.162453, 0.807592, 0.318509, 0.921112];
%! errorbar (0:10, rand_1x11_data1, 0.25*rand_1x11_data2);

%!demo
%! clf;
%! rand_1x11_data3 = [0.423650, 0.142331, 0.213195, 0.129301, 0.975891, 0.012872, 0.635327, 0.338829, 0.764997, 0.401798, 0.551850];
%! rand_1x11_data4 = [0.682566, 0.456342, 0.132390, 0.341292, 0.108633, 0.601553, 0.040455, 0.146665, 0.309187, 0.586291, 0.540149];
%! errorbar (0:10, rand_1x11_data3, rand_1x11_data4, '>');

%!demo
%! clf;
%! x = 0:0.5:2*pi;
%! err = x/100;
%! y1 = sin (x);
%! y2 = cos (x);
%! hg = errorbar (x, y1, err, '~', x, y2, err, '>');

%!demo
%! clf;
%! x = 0:0.5:2*pi;
%! err = x/100;
%! y1 = sin (x);
%! y2 = cos (x);
%! hg = errorbar (x, y1, err, err, '#r', x, y2, err, err, '#~');

%!demo
%! clf;
%! x = 0:0.5:2*pi;
%! err = x/100;
%! y1 = sin (x);
%! y2 = cos (x);
%! hg = errorbar (x, y1, err, err, err, err, '~>', ...
%!                x, y2, err, err, err, err, '#~>-*');