Add questdlg dialog function and fix variety of dialog bugs. * octave-qt-link.cc (octave_qt_link::do_message_dialog): Change initializer from QString to QString::fromStdString(dlg). (octave_qt_link::do_question_dialog): New function. Make all buttons AcceptRole. Signal dialog creation. Go to wait state. Get dialog button result when awakened. (octave_qt_link::do_list_dialog): Change std string 'prompt_string' to std list of std string 'prompt'. Use make_qstring_list(prompt). (octave_qt_link::do_input_dialog): Change 'nr' and 'nc' to std list of float. Use QFloatList::fromStdList(nc). * octave-qt-link.h (octave_qt_link : QObject, public octave_link): Add member do_question_dialog. (octave_qt_link::do_list_dialog): Use std list of std string for prompt. (octave_qt_link::do_input_dialog): Change 'nr' and 'nc' to std list of float. * octave-link.cc (__octave_link_question_dialog__): New builtin. Translate args to inputs of octave_link::question_dialog function. (__octave_link_list_dialog__): Retain prompt string cell list as a std list of std string. (__octave_link_input_dialog__): Make 'nr' and 'nc' std list of float. * octave-link.h (octave_link::question_dialog, octave_link::do_question_dialog): Add. (octave_link::list_dialog, octave_link::do_list_dialog): Change prompt to std list of std string. (octave_link::input_dialog, octave_link::do_input_dialog): Change 'nr' and 'nc' to std list of float. * errordlg.m (errordlg): Make retval return variable. Add "error" icon as message_dialog input. * helpdlg.m (helpdlg): Make retval return variable. Add "help" icon as message_dialog input. * warndlg.m (warndlg): Add "warn" icon as message_dialog input. * message_dialog.m (message_dialog): Define default icon "none". Use dlg variable with icon variable as input to __octave_link_message_dialog__. Use __octave_link_enabled__ rather than return value. * inputdlg.m (inputdlg): Round up rowscols to integer. Replace iscell(cstr) with __octave_link_enabled__. * listdlg.m (listdlg): Correct indentation. Change default selmode from "multiple" to "Multiple". Make default prompt {}. Check valid selmode entry. Use __octave_link_enabled__ rather than ok return value. Remove FIXME note. Use Rich Text in prompt of demo. Add demo using ListSize. * questdlg.m (questdlg): Add case 0 to switch. Add error message for default button not matching options. In all cases, check that default button matches an button option. Add __octave_link_question_dialog__ call conditioned under __octave_link_enabled__. Add three demos. * dialog.cc (QUIWidgetCreator::dialog_finished): Remove. (QUIWidgetCreator::dialog_button_clicked): Test that button pointer is nonzero. Move dialog_result assignment and waitcondition.wakeAll here. (MessageDialog::MessageDialog): If title "", change to " ". Reverse order that buttons are installed. Remove signal 'finished' connection. (ListDialog::ListDialog): Change prompt from QString to QStringList. Make list items noneditable. Add Rich Text support to prompt, place RT <br> between prompt list lines. Use label for prompt. Disable select_all button if not "Multiple". Remove horizontal group box. If title "", change to " ". (InputDialog::InputDialog): Change 'nr' and 'nc' to QFloatList. Define pre-processor variables, then undefine. If title "", change to " ". * dialog.h (QUIWidgetCreator::signal_listviewQUI, WidgetCreator::create_listview): Change QString 'prompt_string' to QStringList 'prompt'. (QUIWidgetCreator::signal_inputlayout, QUIWidgetCreator::create_inputlayout): Use QFloatList for 'nr' and 'nc'. (QUIWidgetCreator::dialog_finished): Remove. (MessageDialog::closeEvent): New override, emitting buttonClicked(0). (ListDialog::ListDialog): Change QString 'prompt_string' to QStringList 'prompt'. (InputDialog::InputDialog): Use QFloatList for 'nr' and 'nc'. * main_window.cc, main_window.h: Make function call changes that match dialog.h changes. (main_window::find_files_finished): Remove unused 'button' variable.

--- a/libgui/src/dialog.h	Mon Apr 22 11:50:40 2013 -0400
+++ b/libgui/src/dialog.h	Mon Apr 22 15:07:13 2013 -0400
@@ -58,7 +58,7 @@
   {
 
     // Use the last button in the list as the reject result, i.e., when no
-    // button is pressed such as in the case of <esc> and close button.
+    // button is pressed such as in the case of the upper right close tab.
     if (!button.isEmpty ())
       dialog_button = button.last ();
 
@@ -75,14 +75,14 @@
 
   bool signal_listview (const QStringList& list, const QString& mode,
                         int wd, int ht, const QList<int>& initial,
-                        const QString& name, const QString& prompt_string,
+                        const QString& name, const QStringList& prompt,
                         const QString& ok_string, const QString& cancel_string)
   {
     if (list.isEmpty ())
       return false;
 
     emit create_listview (list, mode, wd, ht, initial, name,
-                          prompt_string, ok_string, cancel_string);
+                          prompt, ok_string, cancel_string);
 
     return true;
   };
@@ -90,7 +90,7 @@
   const QIntList *get_list_index (void) { return list_index; }
 
   bool signal_inputlayout (const QStringList& prompt, const QString& title,
-                           const QIntList& nr, const QIntList& nc,
+                           const QFloatList& nr, const QFloatList& nc,
                            const QStringList& defaults)
   {
     if (prompt.isEmpty ())
@@ -126,19 +126,17 @@
                       const QStringList&, const QString&, const QStringList&);
 
   void create_listview (const QStringList&, const QString&, int, int,
-                        const QIntList&, const QString&, const QString&,
+                        const QIntList&, const QString&, const QStringList&,
                         const QString&, const QString&);
 
   void create_inputlayout (const QStringList&, const QString&,
-                           const QIntList&, const QIntList&,
+                           const QFloatList&, const QFloatList&,
                            const QStringList&);
 
   void create_debug_cd_or_addpath_dialog (const QString&, const QString&, bool);
 
 public slots:
 
-  void dialog_finished (int result);
-
   void dialog_button_clicked (QAbstractButton *button);
 
   void list_select_finished (const QIntList& selected,
@@ -167,6 +165,7 @@
 
 extern QUIWidgetCreator uiwidget_creator;
 
+
 class MessageDialog : public QMessageBox
 {
   Q_OBJECT
@@ -177,6 +176,15 @@
                           const QString& icon, const QStringList& button,
                           const QString& defbutton,
                           const QStringList& role);
+
+private:
+
+  void closeEvent (QCloseEvent *)
+  {
+    // Reroute the close tab to a button click so there is only a single
+    // route to waking the wait condition.
+    emit buttonClicked (0);
+  }
 };
 
 
@@ -190,7 +198,7 @@
 
   explicit ListDialog (const QStringList& list, const QString& mode,
                        int width, int height, const QList<int>& initial,
-                       const QString& name, const QString& prompt_string,
+                       const QString& name, const QStringList& prompt,
                        const QString& ok_string, const QString& cancel_string);
 
 signals:
@@ -216,7 +224,7 @@
 public:
 
   explicit InputDialog (const QStringList& prompt, const QString& title,
-                        const QIntList& nr, const QIntList& nc,
+                        const QFloatList& nr, const QFloatList& nc,
                         const QStringList& defaults);
 
 signals: