ENH: Add a "Show my changes" to the Tools menu.

Changes by the user are recorded and when requested, it shows
      -D arguments for commandline or contents for a cache file.

Source/QtDialog/CMakeSetupDialog.cxx

@@ -108,6 +108,9 @@ CMakeSetupDialog::CMakeSetupDialog()
   this->GenerateAction = ToolsMenu->addAction(tr("&Generate"));
   QObject::connect(this->GenerateAction, SIGNAL(triggered(bool)), 
                    this, SLOT(doGenerate()));
+  QAction* showChangesAction = ToolsMenu->addAction(tr("&Show My Changes"));
+  QObject::connect(showChangesAction, SIGNAL(triggered(bool)), 
+                   this, SLOT(showUserChanges()));
 #if defined(Q_WS_MAC)
   this->InstallForCommandLineAction 
     = ToolsMenu->addAction(tr("&Install For Command Line Use"));
@@ -512,6 +515,7 @@ void CMakeSetupDialog::onBinaryDirectoryChanged(const QString& dir)
 {
   this->CacheModified = false;
   this->CacheValues->cacheModel()->clear();
+  qobject_cast<QCMakeCacheModelDelegate*>(this->CacheValues->itemDelegate())->clearChanges();
   this->Output->clear();
   QMetaObject::invokeMethod(this->CMakeThread->cmakeInstance(),
     "setBinaryDirectory", Qt::QueuedConnection, Q_ARG(QString, dir));
@@ -962,3 +966,68 @@ void CMakeSetupDialog::setViewType(int v)
   
 }
 
+void CMakeSetupDialog::showUserChanges()
+{
+  QSet<QCMakeProperty> changes =
+    qobject_cast<QCMakeCacheModelDelegate*>(this->CacheValues->itemDelegate())->changes();
+
+  QDialog dialog(this);
+  dialog.setWindowTitle(tr("My Changes"));
+  dialog.resize(600, 400);
+  QVBoxLayout* l = new QVBoxLayout(&dialog);
+  QTextEdit* textedit = new QTextEdit(&dialog);
+  textedit->setReadOnly(true);
+  l->addWidget(textedit);
+  QDialogButtonBox* btns = new QDialogButtonBox(QDialogButtonBox::Ok,
+                                                Qt::Horizontal, &dialog);
+  QObject::connect(btns, SIGNAL(accepted()), &dialog, SLOT(accept()));
+  l->addWidget(btns);
+
+  QString command;
+  QString cache;
+  
+  foreach(QCMakeProperty prop, changes)
+    {
+    QString type;
+    switch(prop.Type)
+      {
+      case QCMakeProperty::BOOL:
+        type = "BOOL";
+        break;
+      case QCMakeProperty::PATH:
+        type = "PATH";
+        break;
+      case QCMakeProperty::FILEPATH:
+        type = "FILEPATH";
+        break;
+      case QCMakeProperty::STRING:
+        type = "STRING";
+        break;
+      }
+    QString value;
+    if(prop.Type == QCMakeProperty::BOOL)
+      {
+      value = prop.Value.toBool() ? "1" : "0";
+      }
+    else
+      {
+      value = prop.Value.toString();
+      }
+
+    QString line("%1:%2=");
+    line = line.arg(prop.Key);
+    line = line.arg(type);
+
+    command += QString("-D%1\"%2\" ").arg(line).arg(value);
+    cache += QString("%1%2\n").arg(line).arg(value);
+    }
+  
+  textedit->append(tr("Commandline options:"));
+  textedit->append(command);
+  textedit->append("\n");
+  textedit->append(tr("Cache file:"));
+  textedit->append(cache);
+  
+  dialog.exec();
+}
+

Source/QtDialog/CMakeSetupDialog.h

@@ -76,6 +76,7 @@ protected slots:
   void startSearch();
   void setDebugOutput(bool);
   void setViewType(int);
+  void showUserChanges();
 
 protected:
 

Source/QtDialog/QCMakeCacheView.cxx

@@ -23,6 +23,7 @@
 #include <QStyle>
 #include <QKeyEvent>
 #include <QSortFilterProxyModel>
+#include <QMetaProperty>
 
 #include "QCMakeWidgets.h"
 
@@ -633,14 +634,22 @@ bool QCMakeCacheModelDelegate::editorEvent(QEvent* e, QAbstractItemModel* model,
 
   Qt::CheckState state = (static_cast<Qt::CheckState>(value.toInt()) == Qt::Checked
                           ? Qt::Unchecked : Qt::Checked);
-  return model->setData(index, state, Qt::CheckStateRole);
+  bool success = model->setData(index, state, Qt::CheckStateRole);
+  if(success)
+    {
+    this->recordChange(model, index);
+    }
+  return success;
 }
   
+// Issue 205903 fixed in Qt 4.5.0.
+// Can remove this function and FileDialogFlag when minimum Qt version is 4.5
 bool QCMakeCacheModelDelegate::eventFilter(QObject* object, QEvent* event)
 {
   // workaround for what looks like a bug in Qt on Mac OS X
   // where it doesn't create a QWidget wrapper for the native file dialog
   // so the Qt library ends up assuming the focus was lost to something else
+
   if(event->type() == QEvent::FocusOut && this->FileDialogFlag)
     {
     return false;
@@ -648,4 +657,47 @@ bool QCMakeCacheModelDelegate::eventFilter(QObject* object, QEvent* event)
   return QItemDelegate::eventFilter(object, event);
 }
 
+void QCMakeCacheModelDelegate::setModelData(QWidget* editor,
+  QAbstractItemModel* model, const QModelIndex& index ) const
+{
+  QItemDelegate::setModelData(editor, model, index);
+  const_cast<QCMakeCacheModelDelegate*>(this)->recordChange(model, index);
+}
   
+QSet<QCMakeProperty> QCMakeCacheModelDelegate::changes() const
+{
+  return mChanges;
+}
+
+void QCMakeCacheModelDelegate::clearChanges()
+{
+  mChanges.clear();
+}
+
+void QCMakeCacheModelDelegate::recordChange(QAbstractItemModel* model, const QModelIndex& index)
+{
+  QModelIndex idx = index;
+  QAbstractItemModel* mymodel = model;
+  while(qobject_cast<QAbstractProxyModel*>(mymodel))
+    {
+    idx = static_cast<QAbstractProxyModel*>(mymodel)->mapToSource(idx);
+    mymodel = static_cast<QAbstractProxyModel*>(mymodel)->sourceModel();
+    }
+  QCMakeCacheModel* cache_model = qobject_cast<QCMakeCacheModel*>(mymodel);
+  if(cache_model && idx.isValid())
+    {
+    QCMakeProperty property;
+    idx = idx.sibling(idx.row(), 0);
+    cache_model->getPropertyData(idx, property);
+    
+    // clean out an old one
+    QSet<QCMakeProperty>::iterator iter = mChanges.find(property);
+    if(iter != mChanges.end())
+      {
+      mChanges.erase(iter);
+      }
+    // now add the new item
+    mChanges.insert(property);
+    }
+}
+

Source/QtDialog/QCMakeCacheView.h

@@ -20,6 +20,7 @@
 
 #include "QCMake.h"
 #include <QTreeView>
+#include <QSet>
 #include <QStandardItemModel>
 #include <QItemDelegate>
 
@@ -111,6 +112,10 @@ public:
   // return flags (overloaded to modify flag based on EditEnabled flag)
   Qt::ItemFlags flags (const QModelIndex& index) const;
   QModelIndex buddy(const QModelIndex& idx) const;
+  
+  // get the data in the model for this property
+  void getPropertyData(const QModelIndex& idx1,
+                       QCMakeProperty& prop) const;
 
 protected:
   bool EditEnabled;
@@ -120,9 +125,6 @@ protected:
   // set the data in the model for this property
   void setPropertyData(const QModelIndex& idx1, 
                        const QCMakeProperty& p, bool isNew);
-  // get the data in the model for this property
-  void getPropertyData(const QModelIndex& idx1,
-                       QCMakeProperty& prop) const;
 
   // breaks up he property list into groups
   // where each group has the same prefix up to the first underscore
@@ -147,10 +149,21 @@ public:
   bool editorEvent (QEvent* event, QAbstractItemModel* model, 
        const QStyleOptionViewItem& option, const QModelIndex& index);
   bool eventFilter(QObject* object, QEvent* event);
+  void setModelData(QWidget * editor, QAbstractItemModel * model, const QModelIndex & index ) const;
+
+  QSet<QCMakeProperty> changes() const;
+  void clearChanges();
+
 protected slots:
   void setFileDialogFlag(bool);
 protected:
   bool FileDialogFlag;
+  // record a change to an item in the model.
+  // this simply saves the item in the set of changes
+  void recordChange(QAbstractItemModel* model, const QModelIndex& index);
+
+  // properties changed by user via this delegate
+  QSet<QCMakeProperty> mChanges;
 };
 
 #endif