Add drop down key selection support to Keyboard Manager UI (dev/build-features) (#2140)

* Added combobox

* Formatted and removed unused code

* Added drop down support for Edit Keyboard window

* Reordered the displayed key list

* Add shortcut stack panels and drop downs linked to detect shortcut

* Add more selected item logic

* Added complete dropdown support for edit shortcuts window

* Added Flyout warning for incorrect drop down input

* Tweaked warnings

* Removed MainWindow code

* Changed SelectedValue toSelectedIndex

* Removed unnecessary assignments

* Added a warning for two dropdowns and the first one is changed to an action key

* Added function comments in cpp file

* Fixed some comments

* Fixed all allocation and out of scope issues

* Fix most issues except reloading shortcuts

* Fixed issue while reloading shortcuts

* Fixed type cast warnings

* Changed delete to delete[]

* tweaked

src/modules/keyboardmanager/common/LayoutMap.h

@@ -5,16 +5,33 @@
 #include <mutex>
 #include <windows.h>
 
+using namespace winrt;
+
 // Wrapper class to handle keyboard layout
 class LayoutMap
 {
 private:
     // Stores mappings for all the virtual key codes to the name of the key
-    std::map<DWORD, std::wstring> keyboardLayoutMap;
     std::mutex keyboardLayoutMap_mutex;
+
+    // Stores the previous layout
     HKL previousLayout = 0;
 
+    // Stores the keys which have a unicode representation
+    std::map<DWORD, std::wstring> unicodeKeys;
+
+    // Stores the keys which do not have a name
+    std::map<DWORD, std::wstring> unknownKeys;
+
+    // Stores true if the fixed ordering key code list has already been set
+    bool isKeyCodeListGenerated = false;
+
+    // Stores a fixed order key code list for the drop down menus. It is kept fixed to change in ordering due to languages
+    std::vector<DWORD> keyCodeList;
+
 public:
+    std::map<DWORD, std::wstring> keyboardLayoutMap;
+
     // Update Keyboard layout according to input locale identifier
     void UpdateLayout();
 
@@ -26,4 +43,9 @@ public:
     // Function to return the unicode string name of the key
     std::wstring GetKeyName(DWORD key);
 
+    // Function to return the list of key codes in the order for the drop down. It creates it if it doesn't exist
+    std::vector<DWORD> GetKeyCodeList(const bool isShortcut = false);
+
+    // Function to return the list of key name in the order for the drop down based on the key codes
+    Windows::Foundation::Collections::IVector<Windows::Foundation::IInspectable> GetKeyNameList(const bool isShortcut = false);
 };