Better implementation of empty QSplitter deletion (no longer crashes).

Call it after restore, because sometimes one splitter was left ?-/

AdvancedDockingSystem/src/API.cpp

@@ -3,21 +3,48 @@
 #include <QWidget>
 #include <QSplitter>
 #include <QLayout>
+#include <QVariant>
 
 #include "ads/ContainerWidget.h"
 #include "ads/SectionWidget.h"
 
 ADS_NAMESPACE_BEGIN
 
+static bool splitterContainsSectionWidget(QSplitter* splitter)
+{
+	for (int i = 0; i < splitter->count(); ++i)
+	{
+		QWidget* w = splitter->widget(i);
+		QSplitter* sp = qobject_cast<QSplitter*>(w);
+		SectionWidget* sw = NULL;
+		if (sp && splitterContainsSectionWidget(sp))
+			return true;
+		else if ((sw = qobject_cast<SectionWidget*>(w)) != NULL)
+			return true;
+	}
+	return false;
+}
+
 void deleteEmptySplitter(ContainerWidget* container)
 {
-	QList<QSplitter*> splitters = container->findChildren<QSplitter*>();
-	for (int i = 0; i < splitters.count(); ++i)
+	bool doAgain = false;
+	do
 	{
-		QSplitter* sp = splitters.at(i);
-		if (sp->count() == 0)
+		doAgain = false;
+		QList<QSplitter*> splitters = container->findChildren<QSplitter*>();
+		for (int i = 0; i < splitters.count(); ++i)
+		{
+			QSplitter* sp = splitters.at(i);
+			if (!sp->property("ads-splitter").toBool())
+				continue;
+			if (sp->count() > 0 && splitterContainsSectionWidget(sp))
+				continue;
 			delete splitters[i];
+			doAgain = true;
+			break;
+		}
 	}
+	while (doAgain);
 }
 
 ContainerWidget* findParentContainerWidget(QWidget* w)

AdvancedDockingSystem/src/ContainerWidget.cpp

@@ -22,6 +22,7 @@ ADS_NAMESPACE_BEGIN
 static QSplitter* newSplitter(Qt::Orientation orientation = Qt::Horizontal, QWidget* parent = 0)
 {
 	QSplitter* s = new QSplitter(orientation, parent);
+	s->setProperty("ads-splitter", QVariant(true));
 	s->setChildrenCollapsible(false);
 	s->setOpaqueResize(false);
 	return s;
@@ -348,9 +349,9 @@ QByteArray ContainerWidget::saveState() const
 	{
 		// Looks like the user has hidden all contents and no more sections
 		// are available. We can simply write a list of all hidden contents.
-		out << 0;
-		out << _hiddenSectionContents.count();
+		out << 0; // Mode
 
+		out << _hiddenSectionContents.count();
 		QHashIterator<int, HiddenSectionItem> iter(_hiddenSectionContents);
 		while (iter.hasNext())
 		{
@@ -360,13 +361,15 @@ QByteArray ContainerWidget::saveState() const
 	}
 	else if (_mainLayout->count() == 1)
 	{
+		out << 1; // Mode
+
 		// There should only be one!
-		out << 1;
 		QLayoutItem* li = _mainLayout->itemAt(0);
 		if (!li->widget())
 			qFatal("Not a widget in _mainLayout, this shouldn't happen.");
-		else
-			saveSectionWidgets(out, li->widget());
+
+		// Save sections beginning with the first QSplitter (li->widget()).
+		saveSectionWidgets(out, li->widget());
 
 		// Safe state of hidden contents, which doesn't have an section association
 		// or the section association points to a no longer existing section.
@@ -563,6 +566,8 @@ bool ContainerWidget::restoreState(const QByteArray& data)
 	for (int i = 0; i < contentsToHide.count(); ++i)
 		hideSectionContent(contentsToHide.at(i));
 
+	deleteEmptySplitter(this);
+
 	qDebug() << "End of restore state" << success;
 	return success;
 }

AdvancedDockingSystemDemo/src/mainwindow.cpp

@@ -97,17 +97,21 @@ MainWindow::MainWindow(QWidget *parent) :
 #if QT_VERSION >= 0x050000
 	QObject::connect(_container, &ADS_NS::ContainerWidget::activeTabChanged, this, &MainWindow::onActiveTabChanged);
 #else
-	QObject::connect(_container, SIGNAL(activeTabChanged(SectionContent::RefPtr,bool)), this, SLOT(onActiveTabChanged(const::ads::SectionContent::RefPtr&,bool)));
+	QObject::connect(_container, SIGNAL(activeTabChanged(const SectionContent::RefPtr&, bool)), this, SLOT(onActiveTabChanged(const SectionContent::RefPtr&, bool)));
 #endif
 	setCentralWidget(_container);
 
 	// Test #1: Use high-level public API
 	if (true)
 	{
-		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));
+		ADS_NS::ContainerWidget* cw = _container;
+		ADS_NS::SectionWidget* sw = NULL;
+
+		sw = _container->addSectionContent(createLongTextLabelSC(cw), sw, ADS_NS::CenterDropArea);
+		sw = _container->addSectionContent(createCalendarSC(cw), sw, ADS_NS::RightDropArea);
+		sw = _container->addSectionContent(createFileSystemTreeSC(cw), sw, ADS_NS::CenterDropArea);
+
+//		_container->addSectionContent(createCalendarSC(_container));
 //		_container->addSectionContent(createLongTextLabelSC(_container));
 //		_container->addSectionContent(createLongTextLabelSC(_container));
 //		_container->addSectionContent(createLongTextLabelSC(_container));

AdvancedDockingSystemDemo/src/mainwindow.h

@@ -19,7 +19,11 @@ public:
 	virtual ~MainWindow();
 
 private slots:
+#if QT_VERSION >= 0x050000
 	void onActiveTabChanged(const ADS_NS::SectionContent::RefPtr& sc, bool active);
+#else
+	void onActiveTabChanged(const SectionContent::RefPtr& sc, bool active);
+#endif
 	void onActionAddSectionContentTriggered();
 
 protected:

README.md

@@ -40,13 +40,15 @@ Items sorted by priority
 ### Beta 0.2
 - [ ] Use scrolling for SectionWidget tabs?
 - [ ] It would be easier when the SectionTitleWidget and SectionContentWidget are created inside the "SectionContent::newSectionContent(..)" method.
-  This would make sure, that those two objects always exists.
+	This would make sure, that those two objects always exists.
 - [ ] `ContainerWidget::showSectionContent` needs to insert the SC at the correct preferred position of SW
+- [ ] It should be possible to drop a floating widget directly into the SW's tab-bar.
 - [ ] Empty splitters, if only 2 or 1 items are in container
 - [ ] Restore: Handle out-of-screen geometry for floating widgets
 - [ ] Better handling of sizes when dropping contents. Currently it's unpredictable.
 	It might be good to use the same width/height as the parent content, if dropped on existing content.
 	In case of outer-drop we might use the preferred size of the content.
+- [ ] Floating widget should be a real window with all of its functionality (maximize and split by moving it to the edge of the screen)
 
 ### Beta 0.1
 - [x] Improve FloatingWidget (Remove maximize button, only support close-button which hides the widget)