Refuse to close config dialogs with OK if settings are invalid

src/libtomahawk/accounts/AccountConfigWidget.cpp

@@ -18,7 +18,34 @@
 
 #include "AccountConfigWidget.h"
 
-AccountConfigWidget::AccountConfigWidget(QWidget *parent) :
-    QWidget(parent)
+AccountConfigWidget::AccountConfigWidget(QWidget *parent)
+    : QWidget(parent)
 {
 }
+
+
+void
+AccountConfigWidget::checkForErrors()
+{
+}
+
+
+const QStringList
+AccountConfigWidget::errors() const
+{
+    return m_errors;
+}
+
+
+void
+AccountConfigWidget::resetErrors()
+{
+    m_errors.clear();
+}
+
+
+bool
+AccountConfigWidget::settingsValid() const
+{
+    return m_errors.empty();
+}

src/libtomahawk/accounts/AccountConfigWidget.h

@@ -28,6 +28,15 @@ class DLLEXPORT AccountConfigWidget : public QWidget
     Q_OBJECT
 public:
     explicit AccountConfigWidget(QWidget *parent = 0);
+
+    virtual void checkForErrors();
+    virtual const QStringList errors() const;
+    virtual void resetErrors();
+
+    virtual bool settingsValid() const;
+
+protected:
+    QStringList m_errors;
 };
 
 #endif // ACCOUNTCONFIGWIDGET_H

src/libtomahawk/accounts/DelegateConfigWrapper.cpp

@@ -103,21 +103,42 @@ DelegateConfigWrapper::closed( QAbstractButton* b )
     if ( buttons->standardButton( b ) == QDialogButtonBox::Help )
         return;
 
-    // let the config widget live to see another day
-    layout()->removeWidget( m_widget );
-    m_widget->setParent( 0 );
-    m_widget->setVisible( false );
+    int doneCode = 0;
 
     if ( buttons->standardButton( b ) == QDialogButtonBox::Ok )
-        done( QDialog::Accepted );
+    {
+        m_widget->resetErrors();
+        m_widget->checkForErrors();
+        if( !m_widget->settingsValid() )
+        {
+            foreach( const QString& error, m_widget->errors() )
+            {
+                QMessageBox::warning( this, tr( "Config Error" ) , error );
+            }
+
+            return;
+        }
+
+        doneCode = QDialog::Accepted;
+    }
     else if ( b == m_deleteButton )
     {
         m_deleted = true;
         emit closedWithDelete();
         reject();
+        return;
     }
     else
-        done( QDialog::Rejected );
+    {
+        doneCode = QDialog::Rejected;
+    }
+
+    // let the config widget live to see another day
+    layout()->removeWidget( m_widget );
+    m_widget->setParent( 0 );
+    m_widget->setVisible( false );
+
+    done( doneCode );
 }