Disable OK button when creating new VG with name of an existing one.

src/gui/createvolumedialog.cpp

@@ -36,7 +36,8 @@
 
 CreateVolumeDialog::CreateVolumeDialog(QWidget* parent, QString& vgname, QStringList& pvlist, qint32& pesize) :
     VolumeDialog(parent, vgname, pvlist),
-    m_PESize(pesize)
+    m_PESize(pesize),
+    m_SystemVGList(LvmDevice::getVGs())
 {
     setWindowTitle(xi18nc("@title:window", "Create new Volume Group"));
 
@@ -78,7 +79,11 @@ void  CreateVolumeDialog::accept()
 
 void CreateVolumeDialog::onVGNameChanged(const QString& vgname)
 {
-    Q_UNUSED(vgname);
+    if (m_SystemVGList.contains(vgname)) {
+        m_IsValidName = false;
+    } else {
+        m_IsValidName = true;
+    }
     updateOkButtonStatus();
 }
 

src/gui/createvolumedialog.h

@@ -42,6 +42,8 @@ protected:
     }
 
     qint32& m_PESize;
+private:
+    QStringList m_SystemVGList;
 };
 
 #endif

src/gui/volumedialog.cpp

@@ -45,6 +45,7 @@ VolumeDialog::VolumeDialog(QWidget* parent, QString& vgname, QStringList& pvlist
     m_TargetName(vgname),
     m_TargetPVList(pvlist),
     m_IsValidSize(false),
+    m_IsValidName(true),
     m_TotalSize(0),
     m_TotalUsedSize(0),
     m_ExtentSize(0)
@@ -121,7 +122,7 @@ void VolumeDialog::updateOkButtonStatus()
 {
     bool enable = isValidSize();
 
-    if (dialogWidget().vgName().text().isEmpty()) {
+    if (dialogWidget().vgName().text().isEmpty() || !isValidName()) {
         enable = false;
     }
     if (dialogWidget().spinPESize().value() <= 0) {

src/gui/volumedialog.h

@@ -80,6 +80,10 @@ protected:
         return m_IsValidSize;
     }
 
+    bool isValidName() const {
+        return m_IsValidName;
+    }
+
 protected:
     virtual void onPartitionListChanged();
 
@@ -88,6 +92,7 @@ protected:
     QString& m_TargetName;
     QStringList& m_TargetPVList;
     bool m_IsValidSize;
+    bool m_IsValidName;
 
     qint64 m_TotalSize;
     qint64 m_TotalUsedSize;