Am 13.01.2011 um 09:40 schrieb Pavel Sanda:

> Stephan Witt wrote:
>> What I do not understand: 
>> why depends the call of GuiDialog::updateView() on the result of canApply()?
> 
> these two commits may reveal something
> r22049 (younes, 'Factorize general code out of GuiDialog...')

Ah... the original version simply was:

DialogView::checkStatus() { updateView(); }

So alternatively we may override Dialog::checkStatus() for GuiThesaurus.
Possible patch is attached.

Stephan

PS. I guess this is a general problem with "half-way" transition of dialogs
with button controller relicts? Is there any advise how to do the right thing?

Index: src/frontends/qt4/GuiThesaurus.cpp
===================================================================
--- src/frontends/qt4/GuiThesaurus.cpp  (Revision 37186)
+++ src/frontends/qt4/GuiThesaurus.cpp  (Arbeitskopie)
@@ -86,7 +86,16 @@
        bc().setPolicy(ButtonPolicy::OkApplyCancelReadOnlyPolicy);
 }
 
-
+void GuiThesaurus::checkStatus()
+{
+       if (!isBufferAvailable()) {
+               // deactivate the thesaurus if we have no buffer
+               enableView(false);
+               return;
+       }
+       updateView();
+}
+       
 void GuiThesaurus::change_adaptor()
 {
        changed();
@@ -119,7 +128,7 @@
        if (pos > -1)
                item = rex.cap(2).trimmed();
        replaceED->setText(item);
-       replacePB->setEnabled(true);
+       replacePB->setEnabled(!isBufferReadonly());
        changed();
 }
 
@@ -182,8 +191,9 @@
                        }
                meaningsTV->setEnabled(true);
                lookupPB->setEnabled(true);
-               replaceED->setEnabled(true);
-               replacePB->setEnabled(true);
+               bool const readonly = isBufferReadonly();
+               replaceED->setEnabled(!readonly);
+               replacePB->setEnabled(!readonly);
        }
 
        if (meanings.empty()) {
Index: src/frontends/qt4/GuiThesaurus.h
===================================================================
--- src/frontends/qt4/GuiThesaurus.h    (Revision 37186)
+++ src/frontends/qt4/GuiThesaurus.h    (Arbeitskopie)
@@ -28,6 +28,8 @@
 public:
        GuiThesaurus(GuiView & lv);
 
+       void checkStatus();
+
 private Q_SLOTS:
        void change_adaptor();
        void entryChanged();

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