From d7c63d4c74472e7bffd47531319c94343feb646f Mon Sep 17 00:00:00 2001
From: Marc Zinnschlag <marc@zpages.de>
Date: Thu, 22 Nov 2012 23:42:17 +0100
Subject: [PATCH] track document modification state and display it in the top
 level window title bar

---
 apps/opencs/model/doc/document.cpp   | 20 +++++++++++++++++++-
 apps/opencs/model/doc/document.hpp   | 22 +++++++++++++++++++++-
 apps/opencs/view/doc/view.cpp        |  8 ++++++++
 apps/opencs/view/doc/view.hpp        |  2 ++
 apps/opencs/view/doc/viewmanager.cpp | 15 +++++++++++++++
 apps/opencs/view/doc/viewmanager.hpp | 11 ++++++++---
 6 files changed, 73 insertions(+), 5 deletions(-)

diff --git a/apps/opencs/model/doc/document.cpp b/apps/opencs/model/doc/document.cpp
index 448598a4e..8770b3b90 100644
--- a/apps/opencs/model/doc/document.cpp
+++ b/apps/opencs/model/doc/document.cpp
@@ -1,9 +1,27 @@
 
 #include "document.hpp"
 
-CSMDoc::Document::Document() {}
+CSMDoc::Document::Document()
+{
+    connect (&mUndoStack, SIGNAL (cleanChanged (bool)), this, SLOT (modificationStateChanged (bool)));
+}
 
 QUndoStack& CSMDoc::Document::getUndoStack()
 {
     return mUndoStack;
+}
+
+int CSMDoc::Document::getState() const
+{
+    int state = 0;
+
+    if (!mUndoStack.isClean())
+        state |= State_Modified;
+
+    return state;
+}
+
+void CSMDoc::Document::modificationStateChanged (bool clean)
+{
+    emit stateChanged (getState(), this);
 }
\ No newline at end of file
diff --git a/apps/opencs/model/doc/document.hpp b/apps/opencs/model/doc/document.hpp
index 1dea7afc2..0499aaf9f 100644
--- a/apps/opencs/model/doc/document.hpp
+++ b/apps/opencs/model/doc/document.hpp
@@ -2,11 +2,21 @@
 #define CSM_DOC_DOCUMENT_H
 
 #include <QUndoStack>
+#include <QObject>
 
 namespace CSMDoc
 {
-    class Document
+    class Document : public QObject
     {
+            Q_OBJECT
+
+        public:
+
+            enum State
+            {
+                    State_Modified = 1
+            };
+
             QUndoStack mUndoStack;
 
             // not implemented
@@ -18,6 +28,16 @@ namespace CSMDoc
             Document();
 
             QUndoStack& getUndoStack();
+
+            int getState() const;
+
+        signals:
+
+            void stateChanged (int state, CSMDoc::Document *document);
+
+        private slots:
+
+            void modificationStateChanged (bool clean);
     };
 }
 
diff --git a/apps/opencs/view/doc/view.cpp b/apps/opencs/view/doc/view.cpp
index c5792b27a..be753e216 100644
--- a/apps/opencs/view/doc/view.cpp
+++ b/apps/opencs/view/doc/view.cpp
@@ -55,6 +55,9 @@ void CSVDoc::View::updateTitle()
 
     stream << "New Document ";
 
+    if (mDocument->getState() & CSMDoc::Document::State_Modified)
+            stream << " *";
+
     if (mViewTotal>1)
         stream << " [" << (mViewIndex+1) << "/" << mViewTotal << "]";
 
@@ -89,6 +92,11 @@ void CSVDoc::View::setIndex (int viewIndex, int totalViews)
     updateTitle();
 }
 
+void CSVDoc::View::updateDocumentState()
+{
+    updateTitle();
+}
+
 void CSVDoc::View::newView()
 {
     mViewManager.addView (mDocument);
diff --git a/apps/opencs/view/doc/view.hpp b/apps/opencs/view/doc/view.hpp
index 2c312715a..67eafe2d5 100644
--- a/apps/opencs/view/doc/view.hpp
+++ b/apps/opencs/view/doc/view.hpp
@@ -50,6 +50,8 @@ namespace CSVDoc
 
             void setIndex (int viewIndex, int totalViews);
 
+            void updateDocumentState();
+
         private slots:
 
             void newView();
diff --git a/apps/opencs/view/doc/viewmanager.cpp b/apps/opencs/view/doc/viewmanager.cpp
index f6ac6e43d..ad391dabe 100644
--- a/apps/opencs/view/doc/viewmanager.cpp
+++ b/apps/opencs/view/doc/viewmanager.cpp
@@ -4,6 +4,7 @@
 #include <map>
 
 #include "../../model/doc/documentmanager.hpp"
+#include "../../model/doc/document.hpp"
 
 #include "view.hpp"
 
@@ -42,6 +43,13 @@ CSVDoc::ViewManager::~ViewManager()
 
 CSVDoc::View *CSVDoc::ViewManager::addView (CSMDoc::Document *document)
 {
+    if (countViews (document)==0)
+    {
+        // new document
+        connect (document, SIGNAL (stateChanged (int, CSMDoc::Document *)),
+            this, SLOT (documentStateChanged (int, CSMDoc::Document *)));
+    }
+
     View *view = new View (*this, document, countViews (document)+1);
 
     mViews.push_back (view);
@@ -84,4 +92,11 @@ bool CSVDoc::ViewManager::closeRequest (View *view)
     }
 
     return true;
+}
+
+void CSVDoc::ViewManager::documentStateChanged (int state, CSMDoc::Document *document)
+{
+    for (std::vector<View *>::const_iterator iter (mViews.begin()); iter!=mViews.end(); ++iter)
+            if ((*iter)->getDocument()==document)
+                (*iter)->updateDocumentState();
 }
\ No newline at end of file
diff --git a/apps/opencs/view/doc/viewmanager.hpp b/apps/opencs/view/doc/viewmanager.hpp
index 765fafbea..1565b7c37 100644
--- a/apps/opencs/view/doc/viewmanager.hpp
+++ b/apps/opencs/view/doc/viewmanager.hpp
@@ -3,6 +3,8 @@
 
 #include <vector>
 
+#include <QObject>
+
 namespace CSMDoc
 {
     class Document;
@@ -13,8 +15,10 @@ namespace CSVDoc
 {
     class View;
 
-    class ViewManager
+    class ViewManager : public QObject
     {
+            Q_OBJECT
+
             CSMDoc::DocumentManager& mDocumentManager;
             std::vector<View *> mViews;
             std::vector<View *> mClosed;
@@ -29,7 +33,7 @@ namespace CSVDoc
 
             ViewManager (CSMDoc::DocumentManager& documentManager);
 
-            ~ViewManager();
+            virtual ~ViewManager();
 
             View *addView (CSMDoc::Document *document);
             ///< The ownership of the returned view is not transferred.
@@ -39,8 +43,9 @@ namespace CSVDoc
 
             bool closeRequest (View *view);
 
+        private slots:
 
-
+            void documentStateChanged (int state, CSMDoc::Document *document);
     };
 
 }