Fix bug where ok button is not enabled if output file name is manually entered

git-svn-id: http://svn.osgeo.org/qgis/trunk@11916 c8812cc2-4d05-0410-92ff-de0c093fc19c

Author: timlinux

src/plugins/interpolation/qgsinterpolationdialog.cpp

@@ -307,6 +307,14 @@ void QgsInterpolationDialog::on_mOutputFileButton_clicked()
   enableOrDisableOkButton();
 }
 
+void QgsInterpolationDialog::on_mOutputFileLineEdit_textChanged()
+{
+  if ( mOutputFileLineEdit->text().endsWith(".asc"))
+  {
+    enableOrDisableOkButton();
+  }
+}
+
 void QgsInterpolationDialog::on_mConfigureInterpolationButton_clicked()
 {
   if ( mInterpolatorDialog )

src/plugins/interpolation/qgsinterpolationdialog.h

@@ -38,6 +38,7 @@ class QgsInterpolationDialog: public QDialog, private Ui::QgsInterpolationDialog
     void on_buttonBox_accepted();
     void on_mInputLayerComboBox_currentIndexChanged( const QString& text );
     void on_mOutputFileButton_clicked();
+    void on_mOutputFileLineEdit_textChanged();
     void on_mConfigureInterpolationButton_clicked();
     void on_mInterpolationMethodComboBox_currentIndexChanged( const QString &text );
     void on_mAddPushButton_clicked();