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 namespace SelectionMode
  19 {
  20
  21 /**
  22  * @brief A Singleton class for managing the colors of selection mode widgets.
  23  */
  24 class BackgroundColorHelper
  25 {
  26 public:
  27     static BackgroundColorHelper *instance();
  28
  29     /**
  30      * 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.
  31      */
  32     void controlBackgroundColor(QWidget *widget);
  33
  34 private:
  35     BackgroundColorHelper();
  36
  37     void slotPaletteChanged();
  38
  39     void updateBackgroundColor();
  40
  41 private:
  42     std::vector<QPointer<QWidget>> m_colorControlledWidgets;
  43     QColor m_backgroundColor;
  44
  45     static BackgroundColorHelper *s_instance;
  46 };
  47
  48 }
  49
  50 #endif // BACKGROUNDCOLORHELPER_H