/**
 * @RDE_HEADER@
 * ComboBox, optimized for tablets (bigger dropdown/popup and more comfortable completer)
 * $Id$
 * $HeadURL$
 * $Author$
 *
 * Created by Mike Wille, SLSE, 2016-03-09
 */

#pragma once

#include "lts_widgets_export.h"

#include <QComboBox>


namespace LtsWidgets
{

/**
 * @brief The LtsComboBox class provides an almost identically version of the QComboBox, with the main difference that this version is more touch friendly.
 * The LtsComboBox's Popup (LtsComboBoxPopup) is a LtsFramelessDialog (screen-centered) with bigger selection-items.
 * For debug purpose: press CTRL while clicking on the popup-button to open the original QComboBox-Popup
 */
class LTSWIDGETS_EXPORT LtsComboBox : public QComboBox // TODO: change title of selection window
{
  Q_OBJECT
  using BaseClass = QComboBox;

public:
  explicit LtsComboBox(QWidget *parent = nullptr);
  ~LtsComboBox() = default;

  /**
   * @brief Set the default widget to use - either the default QComboBox or the selection widget
   * @param bUseSelectionDialog true if the selection widget should be used, false for the normal combobox
   */
  static void setUseSelectionDialog(bool bUseSelectionDialog);

  /**
   * @brief hasValueChanged tells if the value set by default (initialization) or by the user to another value,
   *   different by the default value. If the user sets the value back to the default value, 'hasValueChanged' will return false again.
   *   Use this in your UiRequirement to see if value differs from the default value to determine a change.
   * @return true if value differs from default value and v.v.
   */
  bool hasValueChanged() const;

  void setExternalContentType(int ect) { m_externalContentType = ect; }
  int externalContentType() const { return m_externalContentType; }

protected:
  /**
   * @brief showPopup is emited by the native widget when the popup should be triggered (e.g. by clicking a non-writeable LtsComboBox or by clicking the popup-button) and shows an touch-friendly, screen-centered LtsComboBoxPopup
   */
  void showPopup() override;

  void showEvent(QShowEvent *e) override;
  void enterEvent(QEvent *e) override;
  void leaveEvent(QEvent *) override;

protected slots:
  void userChangedIndex(int index); // user change - for 'hasValueChanged'

signals:
  void signalExternallyChanged(); // e.g. PPM's parties changed, ComboBox should report to PpmComboBox for a refill
  void signalRefill(); // outgoing
  void signalEnterEvent();
  void signalLeaveEvent();

private:
  int m_currentIndex;
  int m_externalContentType;
  static bool s_useSelectionDialog;
};
}