Adding an ImGuiKey 'ImGuiKey_EnterSecondary' to support platforms that differentiate the enter (return key) and the numpad enter key.

examples/imgui_impl_allegro5.cpp

@@ -281,6 +281,7 @@ bool ImGui_ImplAllegro5_Init(ALLEGRO_DISPLAY* display)
     io.KeyMap[ImGuiKey_Backspace] = ALLEGRO_KEY_BACKSPACE;
     io.KeyMap[ImGuiKey_Space] = ALLEGRO_KEY_SPACE;
     io.KeyMap[ImGuiKey_Enter] = ALLEGRO_KEY_ENTER;
+    io.KeyMap[ImGuiKey_EnterSecondary] = ALLEGRO_KEY_PAD_ENTER;
     io.KeyMap[ImGuiKey_Escape] = ALLEGRO_KEY_ESCAPE;
     io.KeyMap[ImGuiKey_A] = ALLEGRO_KEY_A;
     io.KeyMap[ImGuiKey_C] = ALLEGRO_KEY_C;

examples/imgui_impl_glfw.cpp

@@ -150,6 +150,7 @@ static bool ImGui_ImplGlfw_Init(GLFWwindow* window, bool install_callbacks, Glfw
     io.KeyMap[ImGuiKey_Backspace] = GLFW_KEY_BACKSPACE;
     io.KeyMap[ImGuiKey_Space] = GLFW_KEY_SPACE;
     io.KeyMap[ImGuiKey_Enter] = GLFW_KEY_ENTER;
+    io.KeyMap[ImGuiKey_EnterSecondary] = GLFW_KEY_KP_ENTER;
     io.KeyMap[ImGuiKey_Escape] = GLFW_KEY_ESCAPE;
     io.KeyMap[ImGuiKey_A] = GLFW_KEY_A;
     io.KeyMap[ImGuiKey_C] = GLFW_KEY_C;

examples/imgui_impl_marmalade.cpp

@@ -234,6 +234,7 @@ bool    ImGui_Marmalade_Init(bool install_callbacks)
     io.KeyMap[ImGuiKey_Backspace] = s3eKeyBackspace;
     io.KeyMap[ImGuiKey_Space] = s3eKeySpace;
     io.KeyMap[ImGuiKey_Enter] = s3eKeyEnter;
+    io.KeyMap[ImGuiKey_EnterSecondary] = s3eKeyNumPadEnter;
     io.KeyMap[ImGuiKey_Escape] = s3eKeyEsc;
     io.KeyMap[ImGuiKey_A] = s3eKeyA;
     io.KeyMap[ImGuiKey_C] = s3eKeyC;

examples/imgui_impl_osx.mm

@@ -61,6 +61,7 @@ bool ImGui_ImplOSX_Init()
     io.KeyMap[ImGuiKey_Backspace]       = 127;
     io.KeyMap[ImGuiKey_Space]           = 32;
     io.KeyMap[ImGuiKey_Enter]           = 13;
+    io.KeyMap[ImGuiKey_EnterSecondary]  = 13;
     io.KeyMap[ImGuiKey_Escape]          = 27;
     io.KeyMap[ImGuiKey_A]               = 'A';
     io.KeyMap[ImGuiKey_C]               = 'C';

examples/imgui_impl_sdl.cpp

@@ -143,6 +143,7 @@ static bool ImGui_ImplSDL2_Init(SDL_Window* window)
     io.KeyMap[ImGuiKey_Backspace] = SDL_SCANCODE_BACKSPACE;
     io.KeyMap[ImGuiKey_Space] = SDL_SCANCODE_SPACE;
     io.KeyMap[ImGuiKey_Enter] = SDL_SCANCODE_RETURN;
+    io.KeyMap[ImGuiKey_EnterSecondary] = SDL_SCANCODE_RETURN2;
     io.KeyMap[ImGuiKey_Escape] = SDL_SCANCODE_ESCAPE;
     io.KeyMap[ImGuiKey_A] = SDL_SCANCODE_A;
     io.KeyMap[ImGuiKey_C] = SDL_SCANCODE_C;

examples/imgui_impl_win32.cpp

@@ -77,6 +77,7 @@ bool    ImGui_ImplWin32_Init(void* hwnd)
     io.KeyMap[ImGuiKey_Backspace] = VK_BACK;
     io.KeyMap[ImGuiKey_Space] = VK_SPACE;
     io.KeyMap[ImGuiKey_Enter] = VK_RETURN;
+    io.KeyMap[ImGuiKey_EnterSecondary] = VK_RETURN;
     io.KeyMap[ImGuiKey_Escape] = VK_ESCAPE;
     io.KeyMap[ImGuiKey_A] = 'A';
     io.KeyMap[ImGuiKey_C] = 'C';

imgui.h

@@ -940,6 +940,7 @@ enum ImGuiKey_
     ImGuiKey_Backspace,
     ImGuiKey_Space,
     ImGuiKey_Enter,
+    ImGuiKey_EnterSecondary,
     ImGuiKey_Escape,
     ImGuiKey_A,         // for text edit CTRL+A: select all
     ImGuiKey_C,         // for text edit CTRL+C: copy

imgui_widgets.cpp

@@ -3653,7 +3653,7 @@ bool ImGui::InputTextEx(const char* label, const char* hint, char* buf, int buf_
             }
             state->OnKeyPressed(STB_TEXTEDIT_K_BACKSPACE | k_mask);
         }
-        else if (IsKeyPressedMap(ImGuiKey_Enter))
+        else if (IsKeyPressedMap(ImGuiKey_Enter) || IsKeyPressedMap(ImGuiKey_EnterSecondary))
         {
             bool ctrl_enter_for_new_line = (flags & ImGuiInputTextFlags_CtrlEnterForNewLine) != 0;
             if (!is_multiline || (ctrl_enter_for_new_line && !io.KeyCtrl) || (!ctrl_enter_for_new_line && io.KeyCtrl))