From a1516c3b93174af25fe2bb4fe7f1ec1973cebe81 Mon Sep 17 00:00:00 2001
From: Friedemann Kleint <Friedemann.Kleint@qt.io>
Date: Mon, 6 May 2019 09:47:19 +0200
Subject: Windows: Add debug output for message WM_DPICHANGED

Add it to the name lookup and add verbose formatting
to the debug operator.

Task-number: QTBUG-73014
Change-Id: I31ee31bc28ef563fdbc0adedcea03546ced5faad
Reviewed-by: Oliver Wolff <oliver.wolff@qt.io>
---
 src/corelib/kernel/qcoreapplication_win.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/corelib/kernel/qcoreapplication_win.cpp b/src/corelib/kernel/qcoreapplication_win.cpp
index b373267fcb..75cc813298 100644
--- a/src/corelib/kernel/qcoreapplication_win.cpp
+++ b/src/corelib/kernel/qcoreapplication_win.cpp
@@ -48,6 +48,7 @@
 #include "qmutex.h"
 #include <private/qthread_p.h>
 #endif
+#include "qtextstream.h"
 #include <ctype.h>
 #include <qt_windows.h>
 
@@ -480,6 +481,7 @@ static const char *findWMstr(uint msg)
  { 0x02DD, "WM_TABLET_FIRST + 29" },
  { 0x02DE, "WM_TABLET_FIRST + 30" },
  { 0x02DF, "WM_TABLET_LAST" },
+ { 0x02E0, "WM_DPICHANGED" },
  { 0x0300, "WM_CUT" },
  { 0x0301, "WM_COPY" },
  { 0x0302, "WM_PASTE" },
@@ -765,6 +767,13 @@ QString decodeMSG(const MSG& msg)
         case WM_DESTROY:
             parameters = QLatin1String("Destroy hwnd ") + hwndS;
             break;
+        case 0x02E0u: { // WM_DPICHANGED
+            auto rect = reinterpret_cast<const RECT *>(lParam);
+            QTextStream(&parameters) << "DPI: " << HIWORD(wParam) << ','
+                << LOWORD(wParam) << ' ' << (rect->right - rect->left) << 'x'
+                << (rect->bottom - rect->top) << forcesign << rect->left << rect->top;
+            }
+            break;
         case WM_IME_NOTIFY:
             {
                 parameters = QLatin1String("Command(");
-- 
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