BUG: Keep editor alive when file dialog comes up to pick another file or path.

      The editor going away prematurely Seems to only happen on Mac OS X.

Source/QtDialog/QCMakeCacheView.cxx

@@ -372,10 +372,15 @@ bool QCMakeCacheModel::insertRows(int row, int num, const QModelIndex&)
 }
 
 QCMakeCacheModelDelegate::QCMakeCacheModelDelegate(QObject* p)
-  : QItemDelegate(p)
+  : QItemDelegate(p), FileDialogFlag(false)
 {
 }
 
+void QCMakeCacheModelDelegate::setFileDialogFlag(bool f)
+{
+  this->FileDialogFlag = f;
+}
+
 QWidget* QCMakeCacheModelDelegate::createEditor(QWidget* p, 
     const QStyleOptionViewItem&, const QModelIndex& idx) const
 {
@@ -388,13 +393,21 @@ QWidget* QCMakeCacheModelDelegate::createEditor(QWidget* p,
     }
   else if(type == QCMakeCacheProperty::PATH)
     {
-    return new QCMakeCachePathEditor(p, 
+    QCMakeCachePathEditor* editor =
+      new QCMakeCachePathEditor(p, 
       var.data(Qt::DisplayRole).toString());
+    QObject::connect(editor, SIGNAL(fileDialogExists(bool)), this,
+        SLOT(setFileDialogFlag(bool)));
+    return editor;
     }
   else if(type == QCMakeCacheProperty::FILEPATH)
     {
-    return new QCMakeCacheFilePathEditor(p, 
+    QCMakeCacheFilePathEditor* editor =
+      new QCMakeCacheFilePathEditor(p, 
       var.data(Qt::DisplayRole).toString());
+    QObject::connect(editor, SIGNAL(fileDialogExists(bool)), this,
+        SLOT(setFileDialogFlag(bool)));
+    return editor;
     }
 
   return new QLineEdit(p);
@@ -443,6 +456,17 @@ bool QCMakeCacheModelDelegate::editorEvent(QEvent* e, QAbstractItemModel* model,
   return model->setData(index, state, Qt::CheckStateRole);
 }
   
+bool QCMakeCacheModelDelegate::eventFilter(QObject* object, QEvent* event)
+{
+  // workaround for what looks like a bug in Qt on Mac OS X
+  if(event->type() == QEvent::FocusOut && this->FileDialogFlag)
+  {
+    return false;
+  }
+  return QItemDelegate::eventFilter(object, event);
+}
+
+  
 QCMakeCacheFileEditor::QCMakeCacheFileEditor(QWidget* p, const QString& var)
   : QLineEdit(p), Variable(var)
 {
@@ -492,7 +516,9 @@ void QCMakeCacheFilePathEditor::chooseFile()
     title = tr("Select File for %1");
     title = title.arg(this->Variable);
     }
+  this->fileDialogExists(true);
   path = QFileDialog::getOpenFileName(this, title, info.absolutePath());
+  this->fileDialogExists(false);
   
   if(!path.isEmpty())
     {
@@ -514,7 +540,9 @@ void QCMakeCachePathEditor::chooseFile()
     title = tr("Select Path for %1");
     title = title.arg(this->Variable);
     }
+  this->fileDialogExists(true);
   path = QFileDialog::getExistingDirectory(this, title, this->text());
+  this->fileDialogExists(false);
   if(!path.isEmpty())
     {
     this->setText(QDir::fromNativeSeparators(path));

Source/QtDialog/QCMakeCacheView.h

@@ -108,6 +108,11 @@ public:
       const QModelIndex& index ) const;
   bool editorEvent (QEvent* event, QAbstractItemModel* model, 
        const QStyleOptionViewItem& option, const QModelIndex& index);
+  bool eventFilter(QObject* object, QEvent* event);
+protected slots:
+  void setFileDialogFlag(bool);
+protected:
+  bool FileDialogFlag;
 };
 
 /// Editor widget for editing paths or file paths
@@ -118,6 +123,8 @@ public:
   QCMakeCacheFileEditor(QWidget* p, const QString& var);
 protected slots:
   virtual void chooseFile() = 0;
+signals:
+  void fileDialogExists(bool);
 protected:
   void resizeEvent(QResizeEvent* e);
   QToolButton* ToolButton;