Nav: enable move/resize window with keyboard in Ctrl+Tabbing windowing menu even without _NavEnableKeyboard. (ocornut#4023, ocornut#787).

Author: ocornut

Diff for: docs/CHANGELOG.txt

@@ -46,6 +46,7 @@ Other Changes:
 - Fixed IsWindowFocused()/IsWindowHovered() issues with childs inside popups. (#4676)
 - Nav: Ctrl+tabbing to cycle through windows is now enabled regardless of using the _NavEnableKeyboard
   configuration flag. This is part of an effort to generalize the use of keyboard inputs. (#4023, #787).
+  Note that while this is active you can also moving windows (with arrow) and resize (shift+arrows).
 - Nav: tabbing now cycles through clipped items and scroll accordingly. (#4449)
 - Nav: pressing PageUp/PageDown/Home/End when in Menu layer automatically moves back to Main layer.
 - Nav: fixed resizing window from borders setting navigation to Menu layer.

Diff for: imgui.cpp

@@ -5523,7 +5523,7 @@ static bool ImGui::UpdateWindowManualResize(ImGuiWindow* window, const ImVec2& s
     {
         ImVec2 nav_resize_delta;
         if (g.NavInputSource == ImGuiInputSource_Keyboard && g.IO.KeyShift)
-            nav_resize_delta = GetNavInputAmount2d(ImGuiNavDirSourceFlags_Keyboard, ImGuiInputReadMode_Down);
+            nav_resize_delta = GetNavInputAmount2d(ImGuiNavDirSourceFlags_RawKeyboard, ImGuiInputReadMode_Down);
         if (g.NavInputSource == ImGuiInputSource_Gamepad)
             nav_resize_delta = GetNavInputAmount2d(ImGuiNavDirSourceFlags_PadDPad, ImGuiInputReadMode_Down);
         if (nav_resize_delta.x != 0.0f || nav_resize_delta.y != 0.0f)
@@ -9335,6 +9335,8 @@ float ImGui::GetNavInputAmount(ImGuiNavInput n, ImGuiInputReadMode mode)
 ImVec2 ImGui::GetNavInputAmount2d(ImGuiNavDirSourceFlags dir_sources, ImGuiInputReadMode mode, float slow_factor, float fast_factor)
 {
     ImVec2 delta(0.0f, 0.0f);
+    if (dir_sources & ImGuiNavDirSourceFlags_RawKeyboard)
+        delta += ImVec2((float)IsKeyDown(GetKeyIndex(ImGuiKey_RightArrow)) - (float)IsKeyDown(GetKeyIndex(ImGuiKey_LeftArrow)), (float)IsKeyDown(GetKeyIndex(ImGuiKey_DownArrow)) - (float)IsKeyDown(GetKeyIndex(ImGuiKey_UpArrow)));
     if (dir_sources & ImGuiNavDirSourceFlags_Keyboard)
         delta += ImVec2(GetNavInputAmount(ImGuiNavInput_KeyRight_, mode)   - GetNavInputAmount(ImGuiNavInput_KeyLeft_,   mode), GetNavInputAmount(ImGuiNavInput_KeyDown_,   mode) - GetNavInputAmount(ImGuiNavInput_KeyUp_,   mode));
     if (dir_sources & ImGuiNavDirSourceFlags_PadDPad)
@@ -10101,7 +10103,7 @@ static void ImGui::NavUpdateWindowing()
     {
         ImVec2 move_delta;
         if (g.NavInputSource == ImGuiInputSource_Keyboard && !io.KeyShift)
-            move_delta = GetNavInputAmount2d(ImGuiNavDirSourceFlags_Keyboard, ImGuiInputReadMode_Down);
+            move_delta = GetNavInputAmount2d(ImGuiNavDirSourceFlags_RawKeyboard, ImGuiInputReadMode_Down);
         if (g.NavInputSource == ImGuiInputSource_Gamepad)
             move_delta = GetNavInputAmount2d(ImGuiNavDirSourceFlags_PadLStick, ImGuiInputReadMode_Down);
         if (move_delta.x != 0.0f || move_delta.y != 0.0f)

Diff for: imgui_internal.h

@@ -1230,9 +1230,10 @@ enum ImGuiNavHighlightFlags_
 enum ImGuiNavDirSourceFlags_
 {
     ImGuiNavDirSourceFlags_None             = 0,
-    ImGuiNavDirSourceFlags_Keyboard         = 1 << 0,
-    ImGuiNavDirSourceFlags_PadDPad          = 1 << 1,
-    ImGuiNavDirSourceFlags_PadLStick        = 1 << 2
+    ImGuiNavDirSourceFlags_RawKeyboard      = 1 << 0,   // Raw keyboard (not pulled from nav), faciliate use of some functions before we can unify nav and keys
+    ImGuiNavDirSourceFlags_Keyboard         = 1 << 1,
+    ImGuiNavDirSourceFlags_PadDPad          = 1 << 2,
+    ImGuiNavDirSourceFlags_PadLStick        = 1 << 3
 };
 
 enum ImGuiNavMoveFlags_