From 0eef561e7b9bf54b764e7e7254b98530aac5384f Mon Sep 17 00:00:00 2001
From: ManoloFLTK <41016272+ManoloFLTK@users.noreply.github.com>
Date: Fri, 1 Mar 2024 11:11:15 +0100
Subject: Windows: make Ctrl/+/-/0/ scaling system-wide if all screens have
 same DPI

---
 src/drivers/WinAPI/Fl_WinAPI_Screen_Driver.H   | 4 +++-
 src/drivers/WinAPI/Fl_WinAPI_Screen_Driver.cxx | 1 +
 2 files changed, 4 insertions(+), 1 deletion(-)

(limited to 'src/drivers/WinAPI')

diff --git a/src/drivers/WinAPI/Fl_WinAPI_Screen_Driver.H b/src/drivers/WinAPI/Fl_WinAPI_Screen_Driver.H
index 3bbd51d59..816b667f6 100644
--- a/src/drivers/WinAPI/Fl_WinAPI_Screen_Driver.H
+++ b/src/drivers/WinAPI/Fl_WinAPI_Screen_Driver.H
@@ -41,6 +41,8 @@ protected:
 
 public:
   float dpi[MAX_SCREENS][2];
+  enum APP_SCALING_CAPABILITY scaling_capability;
+  void update_scaling_capability();
   Fl_WinAPI_Screen_Driver();
   // --- display management
   int visual(int flags) FL_OVERRIDE;
@@ -72,7 +74,7 @@ public:
   void open_display_platform() FL_OVERRIDE;
   void offscreen_size(Fl_Offscreen off, int &width, int &height) FL_OVERRIDE;
   APP_SCALING_CAPABILITY rescalable() FL_OVERRIDE {
-    return PER_SCREEN_APP_SCALING;
+    return scaling_capability;
   }
   float scale(int n) FL_OVERRIDE {
     return scale_of_screen[n];
diff --git a/src/drivers/WinAPI/Fl_WinAPI_Screen_Driver.cxx b/src/drivers/WinAPI/Fl_WinAPI_Screen_Driver.cxx
index 452815afb..83f8f8973 100644
--- a/src/drivers/WinAPI/Fl_WinAPI_Screen_Driver.cxx
+++ b/src/drivers/WinAPI/Fl_WinAPI_Screen_Driver.cxx
@@ -48,6 +48,7 @@ static Fl_Text_Editor::Key_Binding extra_bindings[] =  {
 Fl_WinAPI_Screen_Driver::Fl_WinAPI_Screen_Driver() : Fl_Screen_Driver() {
   text_editor_extra_key_bindings =  extra_bindings;
   for (int i = 0; i < MAX_SCREENS; i++) scale_of_screen[i] = 1;
+  scaling_capability = SYSTEMWIDE_APP_SCALING;
 }
 
 int Fl_WinAPI_Screen_Driver::visual(int flags)
-- 
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