/**
* @RDE_HEADER@
* FrameLess Dialog with alternatie basecolor
* $Id$
* $HeadURL$
* $Author$
*
* Created by Mike Wille, SLSE, 2016-03-09
*/

#pragma once

#include <QDialog>

#include "lts_base.h"
#include "lts_widgets_export.h"


namespace LtsWidgets
{
/**
 * @brief The Behaviour enum describes how the FramelessDialog handles user input while shown.
 */
enum class Behaviour
{
  Popup = 0, // a mouse click on any surface other than this dialog will close/hide this dialog
  Modal, // disallow any input, but do not block the program execution (does not apply when exec() is used), and avoid rejecting when dialog is modal
};


/**
 * @brief The LtsFramelessDialog class creates a Popup-Dialog, without a frame, but with a shadow as border. This Popup-Dialog is centered in the window .
 * The purpose is to cover the window the user is working with, to interupt the user with a message he has to attend first before continuing work.
 * LtsFramelessDialog is actually a QWidget as this class uses a QWidget which casts a shadow and lays itself on it. Sorry.
 * The Application must never be interrupted, so there is no exec().
 */
class LTSWIDGETS_EXPORT LtsFramelessDialog : public QDialog // TODO: many methods use this to show messages, use LtsMessageDialog instead
{
  Q_OBJECT

public:
  /**
   * @brief LtsFramelessDialog
   * @param parent the widget to be covered
   * @param behaviour see enum LtsWidgets::Behaviour - only affects this Dialog when currently shown
   */
  explicit LtsFramelessDialog(QWidget *parent = nullptr, const Behaviour &behaviour = Behaviour::Popup);
  virtual ~LtsFramelessDialog();

public Q_SLOTS:
  void onUpdateGeometry();
private:
  QRect screenRectFromPoint(const QPoint &pos) const;
  void addTouchScroll(QWidget *widget);

protected:
  void showEvent(QShowEvent *event) override;

};

} // namespace LtsWidgets