src/selectionmode/backgroundcolorhelper.h

   1 /*
   2     This file is part of the KDE project
   3     SPDX-FileCopyrightText: 2022 Felix Ernst <felixernst@zohomail.eu>
   4
   5     SPDX-License-Identifier: LGPL-2.1-only OR LGPL-3.0-only OR LicenseRef-KDE-Accepted-LGPL
   6 */
   7
   8 #ifndef BACKGROUNDCOLORHELPER_H
   9 #define BACKGROUNDCOLORHELPER_H
  10
  11 #include <QColor>
  12 #include <QPointer>
  13
  14 #include <memory>
  15
  16 class QWidget;
  17
  18 /**
  19  * @brief A Singleton class for managing the colors of selection mode widgets.
  20  */
  21 class BackgroundColorHelper
  22 {
  23 public:
  24     static BackgroundColorHelper *instance();
  25
  26     /**
  27      * Changes the background color of @p widget to a distinct color scheme matching color which makes it clear that the widget belongs to the selection mode.
  28      */
  29     void controlBackgroundColor(QWidget *widget);
  30
  31 private:
  32     BackgroundColorHelper();
  33
  34     void slotPaletteChanged();
  35
  36     void updateBackgroundColor();
  37
  38 private:
  39     std::vector<QPointer<QWidget>> m_colorControlledWidgets;
  40     QColor m_backgroundColor;
  41
  42     static BackgroundColorHelper *s_instance;
  43 };
  44
  45 #endif // BACKGROUNDCOLORHELPER_H