disallow the insertion of incomplete citation references, prevent crash (bug 1617)

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@8818 a592a061-630c-0410-9148-cb99ea01b6c8

src/frontends/qt2/ChangeLog

@@ -1,3 +1,7 @@
+2004-06-21  Jürgen Spitzmüller  <j.spitzmueller@gmx.de>
+
+	* QCitation.[Ch]: add validation (fix bug 1617).
+
 2004-06-18  Lars Gullik Bjonnes  <larsbj@gullik.net>
 
 	* lyx_gui.C (roman_font_name): go through QString when converting

src/frontends/qt2/QCitation.C

@@ -19,6 +19,7 @@
 
 #include "bufferparams.h"
 
+#include "controllers/ButtonController.h"
 #include "controllers/ControlCitation.h"
 
 #include "support/lstrings.h"
@@ -212,6 +213,8 @@ void QCitation::update_contents()
 	// the bool prevents that this is also done after "apply"
 	if (open_find_)
 		dialog_->openFind();
+
+	bc().valid(isValid());
 }
 
 
@@ -229,5 +232,12 @@ void QCitation::updateBrowser(QListBox * browser,
 	}
 }
 
+
+bool QCitation::isValid()
+{
+	return dialog_->selectedLB->count() > 0;
+}
+
+
 } // namespace frontend
 } // namespace lyx

src/frontends/qt2/QCitation.h

@@ -31,6 +31,8 @@ public:
 	friend class QCitationDialog;
 	///
 	QCitation(Dialog &);
+protected:
+	virtual bool isValid();
 private:
 
 	/// Set the Params variable for the Controller.

src/frontends/xforms/ChangeLog

@@ -1,3 +1,7 @@
+2004-06-21  Jürgen Spitzmüller  <j.spitzmueller@gmx.de>
+
+	* FormCitation.C: Don't allow incomplete input (fix bug 1617).
+
 2004-06-04  Angus Leeming  <leeming@lyx.org>
 
 	* combox.c (combox_handle): prevent crash when trying to draw

src/frontends/xforms/FormCitation.C

@@ -433,6 +433,10 @@ ButtonPolicy::SMInput FormCitation::input(FL_OBJECT * ob, long)
 			   controller().getCiteStrings(currentCitekey));
 		fl_set_choice(dialog_->choice_style, choice);
 	}
+	
+	// Invalid if no citation has been chosen
+	if (fl_get_browser_maxline(dialog_->browser_cite) < 1)
+		activate = ButtonPolicy::SMI_INVALID;
 
 	return activate;
 }