Backends: Win32: Added support for io.KeySuper (Windows key) for consistency with other backends. (#2976)

Even if realistically it is difficult to make good use of under Windows.
+ Style editor: Use a more explicit form of RadioButton() to avoid being depending on underlying flags type. (#2983)

docs/CHANGELOG.txt

@@ -88,6 +88,8 @@ Other Changes:
   XInput using code, and IMGUI_IMPL_WIN32_DISABLE_LINKING_XINPUT to disable linking with XInput,
   the later may be problematic if compiling with recent Windows SDK and you want your app to run
   on Windows 7. You can instead try linking with Xinput9_1_0.lib instead. (#2716)
+- Backends: Win32: Added support for io.KeySuper (Windows key) for consistency with other backends,
+  even if realistically it is difficult to make good use of under Windows.
 - CI: Added PVS-Studio static analysis on the continuous-integration server. [@rokups]
 - Examples: Explicitly adding -DIMGUI_IMPL_OPENGL_LOADER_GL3W to Makefile to match linking
   settings (otherwise if another loader such as Glew is accessible, the OpenGL3 backend might

examples/imgui_impl_win32.cpp

@@ -28,6 +28,7 @@
 
 // CHANGELOG
 // (minor and older changes stripped away, please see git history for details)
+//  2020-01-17: Inputs: Added support for io.KeySuper (Windows key) for consistency with other backends, even if realistically it is difficult to make good use of under Windows.
 //  2020-01-14: Inputs: Added support for #define IMGUI_IMPL_WIN32_DISABLE_GAMEPAD/IMGUI_IMPL_WIN32_DISABLE_LINKING_XINPUT.
 //  2019-12-05: Inputs: Added support for ImGuiMouseCursor_NotAllowed mouse cursor.
 //  2019-05-11: Inputs: Don't filter value from WM_CHAR before calling AddInputCharacter().
@@ -229,7 +230,7 @@ void    ImGui_ImplWin32_NewFrame()
     io.KeyCtrl = (::GetKeyState(VK_CONTROL) & 0x8000) != 0;
     io.KeyShift = (::GetKeyState(VK_SHIFT) & 0x8000) != 0;
     io.KeyAlt = (::GetKeyState(VK_MENU) & 0x8000) != 0;
-    io.KeySuper = false;
+    io.KeySuper = ((::GetKeyState(VK_LWIN) | ::GetKeyState(VK_RWIN)) & 0x8000) != 0;
     // io.KeysDown[], io.MousePos, io.MouseDown[], io.MouseWheel: filled by the WndProc handler below.
 
     // Update OS mouse position

imgui_demo.cpp

@@ -3374,9 +3374,9 @@ void ImGui::ShowStyleEditor(ImGuiStyle* ref)
             filter.Draw("Filter colors", ImGui::GetFontSize() * 16);
 
             static ImGuiColorEditFlags alpha_flags = 0;
-            ImGui::RadioButton("Opaque", &alpha_flags, 0); ImGui::SameLine();
-            ImGui::RadioButton("Alpha", &alpha_flags, ImGuiColorEditFlags_AlphaPreview); ImGui::SameLine();
-            ImGui::RadioButton("Both", &alpha_flags, ImGuiColorEditFlags_AlphaPreviewHalf); ImGui::SameLine();
+            if (ImGui::RadioButton("Opaque", alpha_flags == 0))                                     { alpha_flags = 0; } ImGui::SameLine();
+            if (ImGui::RadioButton("Alpha",  alpha_flags == ImGuiColorEditFlags_AlphaPreview))      { alpha_flags = ImGuiColorEditFlags_AlphaPreview; } ImGui::SameLine();
+            if (ImGui::RadioButton("Both",   alpha_flags == ImGuiColorEditFlags_AlphaPreviewHalf))  { alpha_flags = ImGuiColorEditFlags_AlphaPreviewHalf; } ImGui::SameLine();
             HelpMarker("In the color list:\nLeft-click on colored square to open color picker,\nRight-click to open edit options menu.");
 
             ImGui::BeginChild("##colors", ImVec2(0, 0), true, ImGuiWindowFlags_AlwaysVerticalScrollbar | ImGuiWindowFlags_AlwaysHorizontalScrollbar | ImGuiWindowFlags_NavFlattened);