Amend f441590c

[lyx.git] / src / frontends / qt4 / GuiPrefs.cpp

diff --git a/src/frontends/qt4/GuiPrefs.cpp b/src/frontends/qt4/GuiPrefs.cpp
index ef6f263ff3f3da0c6c006d38ad010b8c60851ee0..c9ca024cc11b86ff5c5c1140761b4ca4f9a423ee 100644 (file)
--- a/src/frontends/qt4/GuiPrefs.cpp
+++ b/src/frontends/qt4/GuiPrefs.cpp
@@ -1272,10 +1272,16 @@ void PrefDisplay::applyRC(LyXRC & rc) const
                        rc.preview = LyXRC::PREVIEW_OFF;
                        break;
                case 1:
-                       rc.preview = LyXRC::PREVIEW_NO_MATH;
+                       if (rc.preview != LyXRC::PREVIEW_NO_MATH) {
+                               rc.preview = LyXRC::PREVIEW_NO_MATH;
+                               form_->updatePreviews();
+                       }
                        break;
                case 2:
-                       rc.preview = LyXRC::PREVIEW_ON;
+                       if (rc.preview != LyXRC::PREVIEW_ON) {
+                               rc.preview = LyXRC::PREVIEW_ON;
+                               form_->updatePreviews();
+                       }
                        break;
        }
 
@@ -3205,7 +3211,8 @@ void PrefIdentity::updateRC(LyXRC const & rc)
 /////////////////////////////////////////////////////////////////////
 
 GuiPreferences::GuiPreferences(GuiView & lv)
-       : GuiDialog(lv, "prefs", qt_("Preferences")), update_screen_font_(false)
+       : GuiDialog(lv, "prefs", qt_("Preferences")), update_screen_font_(false),
+         update_previews_(false)
 {
        setupUi(this);
 
@@ -3315,6 +3322,7 @@ bool GuiPreferences::initialiseParams(string const &)
        movers_ = theMovers();
        colors_.clear();
        update_screen_font_ = false;
+       update_previews_ = false;
 
        updateRC(rc_);
        // Make sure that the bc is in the INITIAL state
@@ -3359,6 +3367,12 @@ void GuiPreferences::dispatchParams()
                update_screen_font_ = false;
        }
 
+        if (update_previews_) {
+               // resets flag in case second apply in same dialog
+               theBufferList().updatePreviews();
+               update_previews_ = false;
+       }
+
        // The Save button has been pressed
        if (isClosing())
                dispatch(FuncRequest(LFUN_PREFERENCES_SAVE));
@@ -3377,6 +3391,12 @@ void GuiPreferences::updateScreenFonts()
 }
 
 
+void GuiPreferences::updatePreviews()
+{
+       update_previews_ = true;
+}
+
+
 QString GuiPreferences::browsebind(QString const & file) const
 {
        return browseLibFile("bind", file, "bind", qt_("Choose bind file"),