/**
* @RDE_HEADER@
* GridLaout with auto column layouter.
* Layouts all widgets depending on the maxColumn value
* releayouts if maxColumn changed
* $Id$
* $HeadURL$
* $Author$
*/

#pragma once
#include <QGridLayout>
#include <QVector>

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

class QWidget;

namespace LtsWidgets
{
/**
* @brief The LtsGridLayout class provides a LayoutItem for the Lts Layout System and is the equivalent to the QGridLayout.
* An LtsGridLayout can be added to a Widget as any other LayoutItem
* A LtsGridLayout got two modes:
* The first one is the normal operation Mode with a fixed ColumnSize
* every time a widget is added wit add_widget (not addWidget!)
* it will use the next column at the current used row
* when maxColum is reached in the current row
* the Widget will be added to a new row
*
* The Second Mode is enabeled with AutoSize
* There the MaxColumnSize will be calculated
* when a rezize event accure
*/
class LTSWIDGETS_EXPORT LtsGridLayout : public QGridLayout
{
  Q_OBJECT
public:
  /**
  * @brief Constructor for LtsGridLayout
  * @param ButtonSize for calcualting Gridzize on autoSize
  * @param Parent widget
  * @param max Column to use
  */
  explicit LtsGridLayout(LtsWidgets::ButtonSize buttonSize, QWidget *parent = nullptr, int maxColumn = 1);

  /**
  * @brief adds a QWidget to the Layout in the current Row
  * if MaxColumn is reached, the widget will be added to a new row
  * @param QWidget addet to the Layout
  */
  void add_widget(QWidget *widget);

  /**
  * @brief enables autoSize
  * calculates on rezize the MaxColum count for given ButtonSize
  * @param enable autoSize
  */
  void setAutoSize(bool enable);

  /**
  * @brief set MaxColumn
  * @param int maxColum count
  */
  void setMaxColumn(int max);


private:
  void addWidgetInternal(QWidget *widget);

public Q_SLOTS:
  void onParentResize(QResizeEvent *e);


private Q_SLOTS:
  void onWidgetDestroyed();
private:

  LtsWidgets::ButtonSize m_buttonSize;
  int m_defaultMaxColumn;
  int m_maxColumn;
  int m_colSize;
  QVector<QWidget *> m_widgetList;
  QRect m_oldGeo;
  QSize m_oldSize;
  bool m_autoSize;


};

} // namespace