add darkmode support for dialogs derived from StaticDialog

Author: chcg

NppPlugin/src/NppDarkModeDummy.cpp

@@ -1,16 +1,48 @@
-#include "stdafx.h" //ADDED BY PYTHONSCRIPT
 #include "NppDarkMode.h"
+#include "PluginInterface.h"
+
+extern NppData nppData;
+
+static constexpr COLORREF HEXRGB(DWORD rrggbb) {
+	// from 0xRRGGBB like natural #RRGGBB
+	// to the little-endian 0xBBGGRR
+	return
+		((rrggbb & 0xFF0000) >> 16) |
+		((rrggbb & 0x00FF00)) |
+		((rrggbb & 0x0000FF) << 16);
+}
+
 
 namespace NppDarkMode
 {
 	bool isEnabled()
 	{
-		return false;
+		return ::SendMessage(nppData._nppHandle, NPPM_ISDARKMODEENABLED, 0, 0);
+	}
+
+	HBRUSH getDarkerBackgroundBrush()
+	{
+		return ::CreateSolidBrush(HEXRGB(0x202020));
+	}
+
+	COLORREF getTextColor()
+	{
+		return HEXRGB(0xE0E0E0);
 	}
 
-	HBRUSH getDlgBackgroundBrush()
+	COLORREF getDarkerTextColor()
 	{
-		return 0;
+		return HEXRGB(0xC0C0C0);
+	}
+
+	COLORREF getLinkTextColor()
+	{
+		return HEXRGB(0xFFFF00);
+	}
+
+	COLORREF getDarkerBackgroundColor()
+	{
+		return HEXRGB(0x202020);
 	}
 
 	void setDarkTitleBar(HWND /*hwnd*/)
@@ -19,6 +51,19 @@ namespace NppDarkMode
 
 	bool isWindows10()
 	{
-		return true;
+		return false;
 	}
+
+	LRESULT onCtlColorDarker(HDC hdc)
+	{
+		if (!NppDarkMode::isEnabled())
+		{
+			return FALSE;
+		}
+
+		::SetTextColor(hdc, NppDarkMode::getTextColor());
+		::SetBkColor(hdc, NppDarkMode::getDarkerBackgroundColor());
+		return reinterpret_cast<LRESULT>(NppDarkMode::getDarkerBackgroundBrush());
+	}
+
 }

NppPlugin/src/StaticDialog.cpp

@@ -274,6 +274,8 @@ void StaticDialog::create(int dialogID, bool isRTL, bool msgDestParent)
 
 	// if the destination of message NPPM_MODELESSDIALOG is not its parent, then it's the grand-parent
 	::SendMessage(msgDestParent ? _hParent : (::GetParent(_hParent)), NPPM_MODELESSDIALOG, MODELESSDIALOGADD, reinterpret_cast<WPARAM>(_hSelf));
+	//Modified for darkmode support
+	::SendMessage(msgDestParent ? _hParent : (::GetParent(_hParent)), NPPM_DARKMODESUBCLASSANDTHEME, static_cast<WPARAM>(NppDarkMode::dmfInit), reinterpret_cast<LPARAM>(_hSelf));
 }
 
 intptr_t CALLBACK StaticDialog::dlgProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)