fix: #13 custom drop area widgets

- adds public function to set widgets
- some cleanup changes

AdvancedDockingSystem/include/ads/ContainerWidget.h

@@ -112,6 +112,8 @@ public:
 	 */
 	QList<SectionContent::RefPtr> contents() const;
 
+	QPointer<DropOverlay> dropOverlay() const;
+
 private:
 	//
 	// Internal Stuff Begins Here

AdvancedDockingSystem/include/ads/DropOverlay.h

@@ -16,7 +16,7 @@ class DropOverlayCross;
  * DropOverlay paints a translucent rectangle over another widget. The geometry
  * of the rectangle is based on the mouse location.
  */
-class DropOverlay : public QFrame
+class ADS_EXPORT_API DropOverlay : public QFrame
 {
 	Q_OBJECT
 	friend class DropOverlayCross;
@@ -28,6 +28,8 @@ public:
 	void setAllowedAreas(DropAreas areas);
 	DropAreas allowedAreas() const;
 
+	void setAreaWidgets(const QHash<DropArea, QWidget*>& widgets);
+
 	DropArea cursorLocation() const;
 
 	DropArea showDropOverlay(QWidget* target);
@@ -51,7 +53,11 @@ private:
 	DropArea _lastLocation;
 };
 
-// DropOverlayCross shows a cross with 5 different drop area possibilities.
+/*!
+ * DropOverlayCross shows a cross with 5 different drop area possibilities.
+ * I could have handled everything inside DropOverlay, but because of some
+ * styling issues it's better to have a separate class for the cross.
+ */
 class DropOverlayCross : public QWidget
 {
 	Q_OBJECT

AdvancedDockingSystem/src/ContainerWidget.cpp

@@ -434,6 +434,11 @@ QList<SectionContent::RefPtr> ContainerWidget::contents() const
 	return sl;
 }
 
+QPointer<DropOverlay> ContainerWidget::dropOverlay() const
+{
+	return _dropOverlay;
+}
+
 ///////////////////////////////////////////////////////////////////////
 // PRIVATE API BEGINS HERE
 ///////////////////////////////////////////////////////////////////////

AdvancedDockingSystem/src/DropOverlay.cpp

@@ -40,7 +40,7 @@ DropOverlay::DropOverlay(QWidget* parent) :
 	l->setSpacing(0);
 	setLayout(l);
 
-	// Cross widget.
+	// Cross with default drop area widgets.
 	QHash<DropArea, QWidget*> areaWidgets;
 	areaWidgets.insert(ADS_NS::TopDropArea, createDropWidget(":/img/split-top.png"));
 	areaWidgets.insert(ADS_NS::RightDropArea, createDropWidget(":/img/split-right.png"));
@@ -64,8 +64,6 @@ void DropOverlay::setAllowedAreas(DropAreas areas)
 	_allowedAreas = areas;
 
 	_cross->reset();
-//	_cross->move(pos());
-//	_cross->resize(size());
 }
 
 DropAreas DropOverlay::allowedAreas() const
@@ -73,6 +71,11 @@ DropAreas DropOverlay::allowedAreas() const
 	return _allowedAreas;
 }
 
+void DropOverlay::setAreaWidgets(const QHash<DropArea, QWidget*>& widgets)
+{
+	_cross->setAreaWidgets(widgets);
+}
+
 DropArea DropOverlay::cursorLocation() const
 {
 	return _cross->cursorLocation();
@@ -243,7 +246,7 @@ DropOverlayCross::DropOverlayCross(DropOverlay* overlay) :
 	_widgets()
 {
 	setWindowFlags(Qt::Tool | Qt::FramelessWindowHint);
-	setWindowTitle("DropSplitAreas");
+	setWindowTitle("DropOverlayCross");
 	setAttribute(Qt::WA_TranslucentBackground);
 
 	_grid = new QGridLayout();

AdvancedDockingSystemDemo/src/mainwindow.cpp

@@ -11,6 +11,7 @@
 #include <QBoxLayout>
 
 #include "ads/SectionWidget.h"
+#include "ads/DropOverlay.h"
 
 #include "dialogs/SectionContentListWidget.h"
 
@@ -102,6 +103,18 @@ MainWindow::MainWindow(QWidget *parent) :
 #endif
 	setCentralWidget(_container);
 
+	// Optional: Use custom drop area widgets.
+	if (false)
+	{
+		QHash<ADS_NS::DropArea, QWidget*> areaWidgets;
+		areaWidgets.insert(ADS_NS::TopDropArea, new QPushButton("TOP"));
+		areaWidgets.insert(ADS_NS::RightDropArea, new QPushButton("RIGHT"));
+		areaWidgets.insert(ADS_NS::BottomDropArea, new QPushButton("BOTTOM"));
+		areaWidgets.insert(ADS_NS::LeftDropArea, new QPushButton("LEFT"));
+		areaWidgets.insert(ADS_NS::CenterDropArea, new QPushButton("CENTER"));
+		_container->dropOverlay()->setAreaWidgets(areaWidgets);
+	}
+
 	// ADS - Adding some contents.
 	// Test #1: Use high-level public API
 	if (true)