Refactors: Move save/restore impl into separate methods.

Updates SectionContent API: Its only possible to use it as shared pointer
(RefPtr), Copies not possible.
Handle missing or too many content references in restore procecure.

AdvancedDockingSystem/include/ads/ContainerWidget.h

@@ -89,7 +89,8 @@ private:
 	void addSection(SectionWidget* section);
 	SectionWidget* sectionAt(const QPoint& pos) const;
 	SectionWidget* dropContentOuterHelper(QLayout* l, const InternalContentData& data, Qt::Orientation orientation, bool append);
-	void saveGeometryWalk(QDataStream& out, QWidget* widget) const;
+	void saveFloatingWidgets(QDataStream& out) const;
+	void saveSectionWidgets(QDataStream& out, QWidget* widget) const;
 	bool restoreFloatingWidgets(QDataStream& in, QList<FloatingWidget*>& floatings);
 	bool restoreSectionWidgets(QDataStream& in, QSplitter* currentSplitter, QList<SectionWidget*>& sections);
 	bool takeContent(const SectionContent::RefPtr& sc, InternalContentData& data);

AdvancedDockingSystem/include/ads/SectionContent.h

@@ -10,29 +10,43 @@
 #include "ads/API.h"
 
 ADS_NAMESPACE_BEGIN
+class ContainerWidget;
 
 class SectionContent
 {
 	friend class ContainerWidget;
 
 private:
-	SectionContent(QWidget* title, QWidget* content, const QString& uniqueName = QString()); ///< Do not use!
+	SectionContent();
+	SectionContent(const SectionContent&);
+	SectionContent& operator=(const SectionContent&);
 
 public:
 	typedef QSharedPointer<SectionContent> RefPtr;
 	typedef QWeakPointer<SectionContent> WeakPtr;
 
+	/*!
+	 * Creates new content, associates it to <em>container</em> and takes ownership of
+	 * <em>title</em>- and <em>content</em>- widgets.
+	 * \param uniqueName An unique identifier across the entire process.
+	 * \param container The parent ContainerWidget in which this content will be active.
+	 * \param title The widget to use as title.
+	 * \param content The widget to use as content.
+	 * \return May return a invalid ref-pointer in case of invalid parameters.
+	 */
+	static RefPtr newSectionContent(const QString& uniqueName, ContainerWidget* container, QWidget* title, QWidget* content);
+
 	virtual ~SectionContent();
 	int uid() const;
 	QString uniqueName() const;
+	ContainerWidget* containerWidget() const;
 	QWidget* titleWidget() const;
 	QWidget* contentWidget() const;
 
-	static RefPtr newSectionContent(QWidget* title, QWidget* content, const QString& uniqueName = QString());
-
 private:
 	const int _uid;
-	const QString _uniqueName;
+	QString _uniqueName;
+	ContainerWidget* _container;
 	QPointer<QWidget> _title;
 	QPointer<QWidget> _content;
 

AdvancedDockingSystem/src/ContainerWidget.cpp

@@ -131,14 +131,7 @@ QByteArray ContainerWidget::saveState() const
 	out << (quint32) 1; // Version
 
 	// Save state of floating contents
-	out << _floatings.count();
-	for (int i = 0; i < _floatings.count(); ++i)
-	{
-		FloatingWidget* fw = _floatings.at(i);
-		out << fw->content()->uniqueName();
-		out << fw->saveGeometry();
-		out << fw->isVisible();
-	}
+	saveFloatingWidgets(out);
 
 	// Walk through layout for splitters
 	// Well.. there actually shouldn't be more than one
@@ -147,7 +140,7 @@ QByteArray ContainerWidget::saveState() const
 		QLayoutItem* li = _mainLayout->itemAt(i);
 		if (!li->widget())
 			continue;
-		saveGeometryWalk(out, li->widget());
+		saveSectionWidgets(out, li->widget());
 	}
 
 	return ba;
@@ -187,12 +180,49 @@ bool ContainerWidget::restoreState(const QByteArray& data)
 		qWarning() << "Could not restore sections completely";
 	}
 
+	// Handle SectionContent which is not mentioned by deserialized data.
+	// What shall we do with it? For now: Simply drop them into the first SectionWidget.
+	if (true)
+	{
+		QList<SectionContent::RefPtr> leftContents;
+
+		// Collect all contents which has been restored
+		QList<SectionContent::RefPtr> contents;
+		for (int i = 0; i < floatings.count(); ++i)
+			contents.append(floatings.at(i)->content());
+		for (int i = 0; i < sections.count(); ++i)
+			for (int j = 0; j < sections.at(i)->contents().count(); ++j)
+				contents.append(sections.at(i)->contents().at(j));
+
+		// Compare restored contents with available contents
+		const QList<SectionContent::WeakPtr> allContents = SectionContent::LookupMap.values();
+		for (int i = 0; i < allContents.count(); ++i)
+		{
+			const SectionContent::RefPtr sc = allContents.at(i).toStrongRef();
+			if (sc.isNull() || sc->containerWidget() != this)
+				continue;
+			if (contents.contains(sc))
+				continue;
+			leftContents.append(sc);
+		}
+
+		// What should we do with a drunken sailor.. what should.. erm..
+		// .. we do with the left-contents?
+		if (!_sections.isEmpty())
+		{
+			for (int i = 0; i < leftContents.count(); ++i)
+			{
+				const SectionContent::RefPtr sc = leftContents.at(i);
+				InternalContentData data;
+				this->takeContent(sc, data);
+				sections.first()->addContent(sc);
+			}
+		}
+	}
+
 	_floatings = floatings;
 	_sections = sections;
 
-	// TODO Handle contents which are not mentioned by deserialized data
-	// ...
-
 	// Delete old objects
 	QLayoutItem* old = _mainLayout->takeAt(0);
 	_mainLayout->addWidget(_splitter);
@@ -450,7 +480,19 @@ SectionWidget* ContainerWidget::dropContentOuterHelper(QLayout* l, const Interna
 	return sw;
 }
 
-void ContainerWidget::saveGeometryWalk(QDataStream& out, QWidget* widget) const
+void ContainerWidget::saveFloatingWidgets(QDataStream& out) const
+{
+	out << _floatings.count();
+	for (int i = 0; i < _floatings.count(); ++i)
+	{
+		FloatingWidget* fw = _floatings.at(i);
+		out << fw->content()->uniqueName();
+		out << fw->saveGeometry();
+		out << fw->isVisible();
+	}
+}
+
+void ContainerWidget::saveSectionWidgets(QDataStream& out, QWidget* widget) const
 {
 	QSplitter* sp = NULL;
 	SectionWidget* sw = NULL;
@@ -467,7 +509,7 @@ void ContainerWidget::saveGeometryWalk(QDataStream& out, QWidget* widget) const
 		out << sp->sizes();
 		for (int i = 0; i < sp->count(); ++i)
 		{
-			saveGeometryWalk(out, sp->widget(i));
+			saveSectionWidgets(out, sp->widget(i));
 		}
 	}
 	else if ((sw = dynamic_cast<SectionWidget*>(widget)) != NULL)
@@ -538,12 +580,20 @@ bool ContainerWidget::restoreSectionWidgets(QDataStream& in, QSplitter* currentS
 			if (!restoreSectionWidgets(in, sp, sections))
 				return false;
 		}
-		sp->setSizes(sizes);
+		if (sp->count() <= 0)
+		{
+			delete sp;
+			sp = NULL;
+		}
+		else if (sp)
+		{
+			sp->setSizes(sizes);
 
-		if (!currentSplitter)
-			_splitter = sp;
-		else
-			currentSplitter->addWidget(sp);
+			if (!currentSplitter)
+				_splitter = sp;
+			else
+				currentSplitter->addWidget(sp);
+		}
 	}
 	// Section
 	else if (type == 2)
@@ -575,9 +625,17 @@ bool ContainerWidget::restoreSectionWidgets(QDataStream& in, QSplitter* currentS
 
 			sw->addContent(sc);
 		}
-		sw->setCurrentIndex(currentIndex);
-		currentSplitter->addWidget(sw);
-		sections.append(sw);
+		if (sw->contents().isEmpty())
+		{
+			delete sw;
+			sw = NULL;
+		}
+		else if (sw)
+		{
+			sw->setCurrentIndex(currentIndex);
+			currentSplitter->addWidget(sw);
+			sections.append(sw);
+		}
 	}
 	// Unknown
 	else
@@ -601,7 +659,8 @@ bool ContainerWidget::takeContent(const SectionContent::RefPtr& sc, InternalCont
 	for (int i = 0; i < _floatings.count() && !found; ++i)
 	{
 		found = _floatings.at(i)->content()->uid() == sc->uid();
-		_floatings.at(i)->takeContent(data);
+		if (found)
+			_floatings.at(i)->takeContent(data);
 	}
 
 	return found;

AdvancedDockingSystem/src/SectionContent.cpp

@@ -1,5 +1,6 @@
 #include "ads/SectionContent.h"
 
+#include <QDebug>
 #include <QLabel>
 
 ADS_NAMESPACE_BEGIN
@@ -8,14 +9,42 @@ int SectionContent::NextUid = 1;
 QHash<int, SectionContent::WeakPtr> SectionContent::LookupMap;
 QHash<QString, SectionContent::WeakPtr> SectionContent::LookupMapByName;
 
-SectionContent::SectionContent(QWidget* title, QWidget* content, const QString& uniqueName) :
-	_uid(NextUid++),
-	_uniqueName(uniqueName),
-	_title(title),
-	_content(content)
+SectionContent::SectionContent() :
+	_uid(NextUid++)
 {
 }
 
+SectionContent::RefPtr SectionContent::newSectionContent(const QString& uniqueName, ContainerWidget* container, QWidget* title, QWidget* content)
+{
+	if (uniqueName.isEmpty())
+	{
+		qFatal("Can not create SectionContent with empty uniqueName");
+		return RefPtr();
+	}
+	else if (LookupMapByName.contains(uniqueName))
+	{
+		qFatal("Can not create SectionContent with already used uniqueName");
+		return RefPtr();
+	}
+	else if (!container || !title || !content)
+	{
+		qFatal("Can not create SectionContent with NULL values");
+		return RefPtr();
+	}
+
+	QSharedPointer<SectionContent> sc(new SectionContent());
+	sc->_uniqueName = uniqueName;
+	sc->_container = container;
+	sc->_title = title;
+	sc->_content = content;
+
+	LookupMap.insert(sc->uid(), sc);
+	if (!sc->uniqueName().isEmpty())
+		LookupMapByName.insert(sc->uniqueName(), sc);
+
+	return sc;
+}
+
 SectionContent::~SectionContent()
 {
 	LookupMap.remove(_uid);
@@ -34,6 +63,11 @@ QString SectionContent::uniqueName() const
 	return _uniqueName;
 }
 
+ContainerWidget* SectionContent::containerWidget() const
+{
+	return _container;
+}
+
 QWidget* SectionContent::titleWidget() const
 {
 	return _title;
@@ -44,13 +78,4 @@ QWidget* SectionContent::contentWidget() const
 	return _content;
 }
 
-SectionContent::RefPtr SectionContent::newSectionContent(QWidget* title, QWidget* content, const QString& uniqueName)
-{
-	QSharedPointer<SectionContent> sc(new SectionContent(title, content, uniqueName));
-	LookupMap.insert(sc->uid(), sc);
-	if (!sc->uniqueName().isEmpty())
-		LookupMapByName.insert(sc->uniqueName(), sc);
-	return sc;
-}
-
 ADS_NAMESPACE_END

AdvancedDockingSystemDemo/src/mainwindow.cpp

@@ -19,7 +19,7 @@
 
 static int CONTENT_COUNT = 0;
 
-static ADS_NS::SectionContent::RefPtr createLongTextLabelSC()
+static ADS_NS::SectionContent::RefPtr createLongTextLabelSC(ADS_NS::ContainerWidget* container)
 {
 	QWidget* w = new QWidget();
 	QBoxLayout* bl = new QBoxLayout(QBoxLayout::TopToBottom);
@@ -32,18 +32,18 @@ static ADS_NS::SectionContent::RefPtr createLongTextLabelSC()
 	bl->addWidget(l);
 
 	const int index = ++CONTENT_COUNT;
-	return ADS_NS::SectionContent::newSectionContent(new IconTitleWidget(QIcon(), QString("Label %1").arg(index)), w, QString("uname-%1").arg(index));
+	return ADS_NS::SectionContent::newSectionContent(QString("uname-%1").arg(index), container, new IconTitleWidget(QIcon(), QString("Label %1").arg(index)), w);
 }
 
-static ADS_NS::SectionContent::RefPtr createCalendarSC()
+static ADS_NS::SectionContent::RefPtr createCalendarSC(ADS_NS::ContainerWidget* container)
 {
 	QCalendarWidget* w = new QCalendarWidget();
 
 	const int index = ++CONTENT_COUNT;
-	return ADS_NS::SectionContent::newSectionContent(new IconTitleWidget(QIcon(), QString("Calendar %1").arg(index)), w, QString("uname-%1").arg(index));
+	return ADS_NS::SectionContent::newSectionContent(QString("uname-%1").arg(index), container, new IconTitleWidget(QIcon(), QString("Calendar %1").arg(index)), w);
 }
 
-static ADS_NS::SectionContent::RefPtr createFileSystemTreeSC()
+static ADS_NS::SectionContent::RefPtr createFileSystemTreeSC(ADS_NS::ContainerWidget* container)
 {
 	QTreeView* w = new QTreeView();
 	//	QFileSystemModel* m = new QFileSystemModel(w);
@@ -51,7 +51,7 @@ static ADS_NS::SectionContent::RefPtr createFileSystemTreeSC()
 	//	w->setModel(m);
 
 	const int index = ++CONTENT_COUNT;
-	return ADS_NS::SectionContent::newSectionContent(new IconTitleWidget(QIcon(), QString("Filesystem %1").arg(index)), w, QString("uname-%1").arg(index));
+	return ADS_NS::SectionContent::newSectionContent(QString("uname-%1").arg(index), container, new IconTitleWidget(QIcon(), QString("Filesystem %1").arg(index)), w);
 }
 
 static void storeDataHelper(const QString& fname, const QByteArray& ba)
@@ -98,10 +98,13 @@ MainWindow::MainWindow(QWidget *parent) :
 	// Test #1: Use high-level public API
 	if (true)
 	{
-		ADS_NS::SectionWidget* sw1 = _container->addSectionContent(createLongTextLabelSC());
-		ADS_NS::SectionWidget* sw2 = _container->addSectionContent(createCalendarSC(), sw1, ADS_NS::BottomDropArea);
-		ADS_NS::SectionWidget* sw3 = _container->addSectionContent(createFileSystemTreeSC(), NULL, ADS_NS::RightDropArea);
-		ADS_NS::SectionWidget* sw4 = _container->addSectionContent(createCalendarSC());
+		ADS_NS::SectionWidget* sw1 = _container->addSectionContent(createLongTextLabelSC(_container));
+		_container->addSectionContent(createCalendarSC(_container), sw1, ADS_NS::BottomDropArea);
+		_container->addSectionContent(createFileSystemTreeSC(_container), NULL, ADS_NS::RightDropArea);
+		_container->addSectionContent(createCalendarSC(_container));
+//		_container->addSectionContent(createLongTextLabelSC(_container));
+//		_container->addSectionContent(createLongTextLabelSC(_container));
+//		_container->addSectionContent(createLongTextLabelSC(_container));
 	}
 
 	// Default window geometry

README.md

@@ -28,7 +28,7 @@ Sorted by priority
 - [x] Serialize and Deserialize state/size/positions of dockings
 - [x] Make compatible with Qt 4.5 (\*ROFL!\*)
 - [x] Save and restore FloatingWidget states
-- [ ] Restore: Manage new or deleted SectionContent objects, which are not available
+- [x] Restore: Manage new or deleted SectionContent objects, which are not available
 - [ ] Show close button on right corner of SectionWidget
 - [ ] Drop indicator images should be fully visible over the DropOverlay rectangle
 - [ ] Pin contents: Pins a content and its title widget to the edge and opens on click/hover as long as it has focus