Added some parts of ctk lib.

As it looks now that lib contains way more then I want to pull in so i'm just copying the files i'm interested in.

ctk/ctkBasePopupWidget_p.h

@@ -0,0 +1,108 @@
+/*=========================================================================
+
+  Library:   CTK
+
+  Copyright (c) Kitware Inc.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+      http://www.apache.org/licenses/LICENSE-2.0.txt
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+=========================================================================*/
+
+#ifndef __ctkBasePopupWidget_p_h
+#define __ctkBasePopupWidget_p_h
+
+// Qt includes
+#include <QPointer>
+class QLabel;
+class QPropertyAnimation;
+
+// CTK includes
+#include "ctkBasePopupWidget.h"
+#define PopupWindowType Qt::Tool
+
+// -------------------------------------------------------------------------
+/// \ingroup Widgets
+class CTK_WIDGETS_EXPORT ctkBasePopupWidgetPrivate
+  : public QObject
+{
+  Q_OBJECT
+  Q_DECLARE_PUBLIC(ctkBasePopupWidget);
+protected:
+  ctkBasePopupWidget* const q_ptr;
+public:
+  ctkBasePopupWidgetPrivate(ctkBasePopupWidget& object);
+  ~ctkBasePopupWidgetPrivate();
+  virtual void init();
+
+  bool isOpening()const;
+  bool isClosing()const;
+  /// Return true if the animation was closing (direction == backward).
+  /// It doesn't indicate if the action is still running or finished.
+  /// Can only be called in a slot as it uses sender().
+  bool wasClosing()const;
+
+  bool fitBaseWidgetSize()const;
+  Qt::Alignment pixmapAlignment()const;
+  void setupPopupPixmapWidget();
+
+  QWidgetList focusWidgets(bool onlyVisible = false)const;
+
+  // Return the widget if the mouse cursor is above any of the focus widgets or their
+  // children.
+  virtual QWidget* mouseOver();
+
+  // Same as QWidget::isAncestorOf() but don't restrain to the same window
+  // and apply it to all the focusWidgets
+  bool isAncestorOf(const QWidget* ancestor, const QWidget* child)const;
+
+
+  /// Return the closed geometry for the popup based on the current geometry
+  QRect closedGeometry()const;
+  /// Return the closed geometry for a given open geometry 
+  QRect closedGeometry(QRect openGeom)const;
+  
+  /// Return the desired geometry, maybe it won't happen if the size is too
+  /// small for the popup.
+  QRect desiredOpenGeometry()const;
+  QRect desiredOpenGeometry(QRect baseGeometry)const;
+  QRect baseGeometry()const;
+  QPoint mapToGlobal(const QPoint& baseWidgetPoint)const;
+  
+  QPropertyAnimation* currentAnimation()const;
+
+  //void temporarilyHiddenOn();
+  //void temporarilyHiddenOff();
+
+  void hideAll();
+
+protected:
+  QPointer<QWidget> BaseWidget;
+
+  double EffectAlpha;
+
+  ctkBasePopupWidget::AnimationEffect Effect;
+  int                 EffectDuration;
+  QPropertyAnimation* AlphaAnimation;
+  bool                ForcedTranslucent;
+  QPropertyAnimation* ScrollAnimation;
+  QLabel*             PopupPixmapWidget;
+  
+  // Geometry attributes
+  Qt::Alignment    Alignment;
+  Qt::Orientations Orientations;
+
+  ctkBasePopupWidget::VerticalDirection VerticalDirection;
+  Qt::LayoutDirection HorizontalDirection;
+};
+
+#endif