winDark.h

/**
 *
 * Respect Windows Dark/Light themes for QT windows
 * Naveen K <prime@envyen.com>
 *
 * Based on https://github.com/statiolake/neovim-qt/commit/da8eaba7f0e38b6b51f3bacd02a8cc2d1f7a34d8
 * Warning: this is not a proper solution, and Windows api can change !!
 * Stylesheet based on https://forum.qt.io/post/523388
 *
 **/
#ifndef WINDARK_H
#define WINDARK_H

#include <QPalette>
#include <QSettings>
#include <QStyleFactory>
#include <QApplication>
#include <qwidget.h>

#ifdef Q_OS_WIN
#include <Windows.h>
#include <dwmapi.h>
#pragma comment (lib, "Dwmapi.lib")
#endif

namespace winDark {

void setDark_qApp();
void setDark_Titlebar(HWND hwnd);
bool isDarkTheme();

#ifdef Q_OS_WIN
enum PreferredAppMode {
    Default,
    AllowDark,
    ForceDark,
    ForceLight,
    Max
};

enum WINDOWCOMPOSITIONATTRIB {
    WCA_UNDEFINED = 0,
    WCA_NCRENDERING_ENABLED = 1,
    WCA_NCRENDERING_POLICY = 2,
    WCA_TRANSITIONS_FORCEDISABLED = 3,
    WCA_ALLOW_NCPAINT = 4,
    WCA_CAPTION_BUTTON_BOUNDS = 5,
    WCA_NONCLIENT_RTL_LAYOUT = 6,
    WCA_FORCE_ICONIC_REPRESENTATION = 7,
    WCA_EXTENDED_FRAME_BOUNDS = 8,
    WCA_HAS_ICONIC_BITMAP = 9,
    WCA_THEME_ATTRIBUTES = 10,
    WCA_NCRENDERING_EXILED = 11,
    WCA_NCADORNMENTINFO = 12,
    WCA_EXCLUDED_FROM_LIVEPREVIEW = 13,
    WCA_VIDEO_OVERLAY_ACTIVE = 14,
    WCA_FORCE_ACTIVEWINDOW_APPEARANCE = 15,
    WCA_DISALLOW_PEEK = 16,
    WCA_CLOAK = 17,
    WCA_CLOAKED = 18,
    WCA_ACCENT_POLICY = 19,
    WCA_FREEZE_REPRESENTATION = 20,
    WCA_EVER_UNCLOAKED = 21,
    WCA_VISUAL_OWNER = 22,
    WCA_HOLOGRAPHIC = 23,
    WCA_EXCLUDED_FROM_DDA = 24,
    WCA_PASSIVEUPDATEMODE = 25,
    WCA_USEDARKMODECOLORS = 26,
    WCA_LAST = 27
};

struct WINDOWCOMPOSITIONATTRIBDATA {
    WINDOWCOMPOSITIONATTRIB Attrib;
    PVOID pvData;
    SIZE_T cbData;
};

using fnAllowDarkModeForWindow =  BOOL (WINAPI *)(HWND hWnd, BOOL allow);
using fnSetPreferredAppMode = PreferredAppMode (WINAPI *)(PreferredAppMode appMode);
using fnSetWindowCompositionAttribute =  BOOL (WINAPI *)(HWND hwnd, WINDOWCOMPOSITIONATTRIBDATA *);


#endif

} // ns

#endif // WINDARK_H