Enable styling of focused dockwidget

src/DockManager.cpp

@@ -45,6 +45,8 @@
 #include <QSettings>
 #include <QMenu>
 #include <QApplication>
+#include <QGuiApplication>
+#include <QPointer>
 
 #include "FloatingDockContainer.h"
 #include "DockOverlay.h"
@@ -53,6 +55,7 @@
 #include "DockAreaWidget.h"
 #include "IconProvider.h"
 #include "DockingStateReader.h"
+#include "DockAreaTitleBar.h"
 
 
 /**
@@ -91,6 +94,7 @@ struct DockManagerPrivate
 	CDockManager::eViewMenuInsertionOrder MenuInsertionOrder = CDockManager::MenuAlphabeticallySorted;
 	bool RestoringState = false;
 	QVector<CFloatingDockContainer*> UninitializedFloatingWidgets;
+	QPointer<CDockWidget> FocusedDockWidget;
 
 	/**
 	 * Private data constructor
@@ -437,6 +441,8 @@ CDockManager::CDockManager(QWidget *parent) :
 	d->ContainerOverlay = new CDockOverlay(this, CDockOverlay::ModeContainerOverlay);
 	d->Containers.append(this);
 	d->loadStylesheet();
+	connect(QGuiApplication::instance(), SIGNAL(focusObjectChanged(QObject*)),
+		this, SLOT(onFocusObjectChanged(QObject*)));
 }
 
 //============================================================================
@@ -872,6 +878,74 @@ CIconProvider& CDockManager::iconProvider()
 }
 
 
+//===========================================================================
+void  CDockManager::onFocusObjectChanged(QObject *focusObject)
+{
+	auto FocusWidget = qobject_cast<QWidget*>(focusObject);
+	if (!FocusWidget)
+	{
+		return;
+	}
+	auto DockWidget = internal::findParent<CDockWidget*>(FocusWidget);
+	if (!DockWidget)
+	{
+		return;
+	}
+
+	if (d->FocusedDockWidget.data() == DockWidget)
+	{
+		return;
+	}
+
+	QList<CDockWidget*> DockWidgets;
+	CDockAreaWidget* OldFocusedDockArea = nullptr;
+	CDockAreaWidget* NewFocusedDockArea = nullptr;
+	if (d->FocusedDockWidget)
+	{
+		d->FocusedDockWidget->setProperty("focused", false);
+		d->FocusedDockWidget->tabWidget()->setProperty("focused", false);
+		OldFocusedDockArea = d->FocusedDockWidget->dockAreaWidget();
+		if (OldFocusedDockArea)
+		{
+			OldFocusedDockArea->setProperty("focused", false);
+		}
+		DockWidgets.append(d->FocusedDockWidget);
+	}
+	d->FocusedDockWidget = DockWidget;
+	d->FocusedDockWidget->setProperty("focused", true);
+	d->FocusedDockWidget->tabWidget()->setProperty("focused", true);
+	NewFocusedDockArea = d->FocusedDockWidget->dockAreaWidget();
+	if (NewFocusedDockArea)
+	{
+		NewFocusedDockArea->setProperty("focused", true);
+	}
+	DockWidgets.append(d->FocusedDockWidget);
+
+	for (auto DockWidget : DockWidgets)
+	{
+		DockWidget->tabWidget()->updateStyle();
+		internal::repolishStyle(DockWidget);
+	}
+
+	if (OldFocusedDockArea == NewFocusedDockArea)
+	{
+		return;
+	}
+
+	if (OldFocusedDockArea)
+	{
+		internal::repolishStyle(OldFocusedDockArea);
+		internal::repolishStyle(OldFocusedDockArea->titleBar());
+	}
+
+	if (NewFocusedDockArea)
+	{
+		internal::repolishStyle(NewFocusedDockArea);
+		internal::repolishStyle(NewFocusedDockArea->titleBar());
+	}
+}
+
+
 } // namespace ads
 
 //---------------------------------------------------------------------------

src/DockManager.h

@@ -84,6 +84,9 @@ private:
 	friend struct FloatingDragPreviewPrivate;
 	friend class CDockAreaTitleBar;
 
+private slots:
+	void onFocusObjectChanged(QObject *focusObject);
+
 protected:
 	/**
 	 * Registers the given floating widget in the internal list of

src/DockWidgetTab.cpp

@@ -160,6 +160,7 @@ struct DockWidgetTabPrivate
 		GlobalDragStartMousePosition = GlobalPos;
 		DragStartMousePosition = _this->mapFromGlobal(GlobalPos);
 	}
+
 };
 // struct DockWidgetTabPrivate
 
@@ -467,10 +468,7 @@ void CDockWidgetTab::setActiveTab(bool active)
 	}
 
 	d->IsActiveTab = active;
-	style()->unpolish(this);
+	updateStyle();
-	style()->polish(this);
-	d->TitleLabel->style()->unpolish(d->TitleLabel);
-	d->TitleLabel->style()->polish(d->TitleLabel);
 	update();
 	updateGeometry();
 
@@ -641,6 +639,16 @@ void CDockWidgetTab::setElideMode(Qt::TextElideMode mode)
 }
 
 
+//============================================================================
+void CDockWidgetTab::updateStyle()
+{
+	this->style()->unpolish(this);
+	this->style()->polish(this);
+	d->TitleLabel->style()->unpolish(d->TitleLabel);
+	d->TitleLabel->style()->polish(d->TitleLabel);
+}
+
+
 
 
 } // namespace ads

src/DockWidgetTab.h

@@ -39,6 +39,7 @@ namespace ads
 class CDockWidget;
 class CDockAreaWidget;
 struct DockWidgetTabPrivate;
+class CDockManager;
 
 /**
  * A dock widget tab that shows a title and an icon.
@@ -54,6 +55,7 @@ private:
 	DockWidgetTabPrivate* d; ///< private data (pimpl)
 	friend struct DockWidgetTabPrivate;
 	friend class CDockWidget;
+	friend class CDockManager;
 	void onDockWidgetFeaturesChanged();
 
 private slots:
@@ -70,6 +72,11 @@ protected:
 	 */
 	virtual void mouseDoubleClickEvent(QMouseEvent *event) override;
 
+	/**
+	 * Update stylesheet style if a property changes
+	 */
+	void updateStyle();
+
 public:
 	using Super = QFrame;
 	/**

src/ads_globals.cpp

@@ -31,6 +31,7 @@
 #include <QVariant>
 #include <QPainter>
 #include <QAbstractButton>
+#include <QStyle>
 
 #include "DockSplitter.h"
 #include "DockManager.h"
@@ -118,6 +119,18 @@ void setButtonIcon(QAbstractButton* Button, QStyle::StandardPixmap StandarPixmap
 #endif
 }
 
+
+//============================================================================
+void repolishStyle(QWidget* w)
+{
+	if (!w)
+	{
+		return;
+	}
+	w->style()->unpolish(w);
+	w->style()->polish(w);
+}
+
 } // namespace internal
 } // namespace ads
 

src/ads_globals.h

@@ -251,6 +251,13 @@ void setToolTip(QObjectPtr obj, const QString &tip)
 void setButtonIcon(QAbstractButton* Button, QStyle::StandardPixmap StandarPixmap,
 	ads::eIcon CustomIconId);
 
+
+/**
+ * Calls unpolish() / polish for the style of the given widget to update
+ * stylesheet if a property changes
+ */
+void repolishStyle(QWidget* w);
+
 } // namespace internal
 } // namespace ads
 

src/stylesheets/default.css

@@ -9,10 +9,6 @@ ads--CDockContainerWidget
     background: palette(dark);
 }
 
-ads--CDockContainerWidget QSplitter::handle
-{
-    background: palette(dark);
-}
 
 ads--CDockAreaWidget
 {
@@ -92,3 +88,43 @@ QScrollArea#dockWidgetScrollArea
 }
 
 
+ads--CDockSplitter::handle
+{
+    background-color: palette(dark);
+    /* uncomment the following line if you would like to change the size of
+       the splitter handles */
+    /* height: 1px; */
+}
+
+
+
+ads--CDockWidgetTab[focused="true"]
+{
+    background: palette(highlight);
+    border-color: palette(highlight);
+}
+
+ads--CDockWidgetTab[focused="true"] QLabel
+{
+    color: palette(light);
+}
+
+
+ads--CDockAreaTitleBar
+{
+	background: transparent;
+	border-bottom: 2px solid palette(light);
+	padding-bottom: 0px;
+}
+
+ads--CDockAreaWidget[focused="true"] ads--CDockAreaTitleBar
+{
+	background: transparent;
+	border-bottom: 2px solid palette(highlight);
+	padding-bottom: 0px;
+}
+
+
+
+
+