Toolchain: Add option to make toolchain readonly

Do not just disable the toolchain when it is read-only. Add a method to
make it read-only instead.

Task-number: QTCREATORBUG-4211

src/plugins/projectexplorer/gcctoolchain.cpp

@@ -626,6 +626,13 @@ bool Internal::GccToolChainConfigWidget::isDirty() const
             || m_abiList.at(m_abiComboBox->currentIndex()) != tc->targetAbi();
 }
 
+void Internal::GccToolChainConfigWidget::makeReadOnly()
+{
+    m_compilerPath->setEnabled(false);
+    m_abiComboBox->setEnabled(false);
+    ToolChainConfigWidget::makeReadOnly();
+}
+
 void Internal::GccToolChainConfigWidget::handlePathChange()
 {
     QString path = m_compilerPath->path();

src/plugins/projectexplorer/gcctoolchainfactories.h

@@ -91,6 +91,7 @@ public:
     void apply();
     void discard() { setFromToolchain(); }
     bool isDirty() const;
+    void makeReadOnly();
 
 private slots:
     void handlePathChange();

src/plugins/projectexplorer/toolchainconfigwidget.cpp

@@ -83,6 +83,12 @@ ToolChain *ToolChainConfigWidget::toolChain() const
     return m_d->m_toolChain;
 }
 
+void ToolChainConfigWidget::makeReadOnly()
+{
+    if (m_d->m_debuggerPathChooser)
+        m_d->m_debuggerPathChooser->setEnabled(false);
+}
+
 void ToolChainConfigWidget::emitDirty()
 {
     emit dirty(toolChain());

src/plugins/projectexplorer/toolchainconfigwidget.h

@@ -68,6 +68,8 @@ public:
 
     virtual bool isDirty() const = 0;
 
+    virtual void makeReadOnly();
+
 signals:
     void dirty(ProjectExplorer::ToolChain *);
 

src/plugins/projectexplorer/toolchainoptionspage.cpp

@@ -63,7 +63,8 @@ public:
             p->childNodes.append(this);
         widget = tc ? tc->configurationWidget() : 0;
         if (widget) {
-            widget->setEnabled(tc ? !tc->isAutoDetected() : false);
+            if (tc && tc->isAutoDetected())
+                widget->makeReadOnly();
             widget->setVisible(false);
         }
     }

src/plugins/qt4projectmanager/qt-s60/rvcttoolchain.cpp

@@ -421,6 +421,14 @@ bool RvctToolChainConfigWidget::isDirty() const
             || tc->debuggerCommand() != debuggerCommand();
 }
 
+void RvctToolChainConfigWidget::makeReadOnly()
+{
+    m_ui->versionComboBox->setEnabled(false);
+    m_ui->compilerPath->setEnabled(false);
+    m_ui->environmentView->setEditTriggers(QAbstractItemView::NoEditTriggers);
+    ProjectExplorer::ToolChainConfigWidget::makeReadOnly();
+}
+
 QList<Utils::EnvironmentItem> RvctToolChainConfigWidget::environmentChanges() const
 {
     Utils::Environment baseEnv;

src/plugins/qt4projectmanager/qt-s60/rvcttoolchain.h

@@ -147,6 +147,7 @@ public:
     void apply();
     void discard() { setFromToolChain(); }
     bool isDirty() const;
+    void makeReadOnly();
 
 private:
     void setFromToolChain();