/*=========================================================================

  Library:   CTK
 
  Copyright (c) 2010  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.commontk.org/LICENSE

  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 __ctkWorkflowTabWidget_h
#define __ctkWorkflowTabWidget_h

// Qt includes
#include <QTabWidget>

// CTK includes
#include "ctkWorkflowAbstractPagedWidget.h"
#include "ctkPimpl.h"
#include "CTKWidgetsExport.h"

class ctkWorkflowTabWidgetPrivate;


///
/// \brief ctkWorkflowStackedWidget is the basis for a workflow with a user
/// interface containing a QTabWidget.
///
/// The client area is a QTabWidget, onto which step-specific
/// widgets can be placed.
///
/// Multiple workflow steps can correspond to the same page of the
/// QStackedWidget.  The main widget can be inserted directly inside
/// another user interface.

class CTK_WIDGETS_EXPORT ctkWorkflowTabWidget : public ctkWorkflowAbstractPagedWidget
{
  Q_OBJECT

public:

  typedef ctkWorkflowAbstractPagedWidget Superclass;
  explicit ctkWorkflowTabWidget(QWidget* newParent = 0);
  virtual ~ctkWorkflowTabWidget(){}

  /// Provided for advanced customization: get the client area.
  /// A workflow containing a user interface is made up of steps
  /// (ctkWorkflowWidgetStep).  Each step should either:
  /// 1) reimplement ctkWorkflowWidgetStep::populateStepWidgetsList or
  /// set its populateStepWidgetsListCommand to point to a method that
  /// will add the custom-step's widgets to the list; or
  /// 2) reimplement ctkWorkflowWidgetStep::showUserInterface or set
  /// its showUserInterfaceCommand to point to a method that will
  /// display the step's user interface.  Within that method, each of
  /// the custom step's widgets should be added to the workflow
  /// widget's clientArea using the addWidget() function.
  /// If you do not associate a layout manager with the clientArea,
  /// the default layout manager is a QBoxLayout with direction
  /// QBoxLayout::TopToBottom.  Use the function
  /// setClientAreaDirection() to change the direction.
  /// For additional customization of layouts, note that
  /// ctkWorkflowTabWidget()->clientArea()->setLayout() will likely
  /// not allow you to customize the client area layout.  Customize
  /// specific pages instead using
  /// ctkWorkflowTabWidget::getWidgetFromIndex(index)->setLayout()
  virtual QTabWidget* clientArea();

  /// Provided for advanced customization: get the widget
  /// corresponding to the page of the given index
  virtual QWidget* getWidgetFromIndex(int index);

protected:

  /// Add a widget to a new page of the client area.
  /// The label will be the name of the tab.
  virtual void addWidgetToClientArea(QWidget* widget, const QString& label);

  /// Set the current widget to that of the page containing the given widget
  virtual void setCurrentWidget(QWidget* widget) ;

private:
  CTK_DECLARE_PRIVATE(ctkWorkflowTabWidget);
};

#endif