update for file open dialog

src/CMakeLists.txt

@@ -30,7 +30,7 @@ function(buildHomework HOMEWORK_NAME)
 	# Add optional readme / tutorial
 	file(GLOB README_FILES "${HOMEWORK_FOLDER}/*.md")
 	if(WIN32)
-		add_executable(${HOMEWORK_NAME} WIN32 ${MAIN_CPP} ${SOURCE} ${MAIN_HEADER} ${SHADERS_GLSL} ${SHADERS_HLSL} ${README_FILES} "render/glTFModel.h" "render/glTFModel.cpp")
+		add_executable(${HOMEWORK_NAME} WIN32 ${MAIN_CPP} ${SOURCE} ${MAIN_HEADER} ${SHADERS_GLSL} ${SHADERS_HLSL} ${README_FILES} "render/glTFModel.h" "render/glTFModel.cpp" "render/GUIFunction.h" "render/GUIFunction.cpp")
 		target_link_libraries(${HOMEWORK_NAME} base ${Vulkan_LIBRARY} ${WINLIBS})
 	else(WIN32)
 		add_executable(${HOMEWORK_NAME} ${MAIN_CPP} ${SOURCE} ${MAIN_HEADER} ${SHADERS_GLSL} ${SHADERS_HLSL} ${README_FILES})

src/render/GUIFunction.cpp

@@ -0,0 +1,47 @@
+
+#include "GUIFunction.h"
+
+
+// win32 api IFileOpenDialog
+PWSTR GUIFunction::openFileFolderDialog(HINSTANCE hInstance, HINSTANCE, PWSTR pCmdLine, int nCmdShow)
+{
+	//initialize COM lib
+	HRESULT hResult = CoInitializeEx(NULL, COINIT_APARTMENTTHREADED | COINIT_DISABLE_OLE1DDE);
+    if (SUCCEEDED(hResult))
+    {
+        IFileOpenDialog* pFileOpen = nullptr;
+
+        hResult = CoCreateInstance(CLSID_FileOpenDialog, NULL, CLSCTX_ALL, IID_IFileOpenDialog, reinterpret_cast<void**>(&pFileOpen));
+
+        if (SUCCEEDED(hResult))
+        {
+            // Show the Open dialog box.
+            hResult = pFileOpen->Show(NULL);
+
+            // Get the file name from the dialog box.
+            if (SUCCEEDED(hResult))
+            {
+                IShellItem* pItem;
+                hResult = pFileOpen->GetResult(&pItem);
+                if (SUCCEEDED(hResult))
+                {
+                    PWSTR pszFilePath;
+                    hResult = pItem->GetDisplayName(SIGDN_FILESYSPATH, &pszFilePath);
+                    
+                    // Display the file name to the user.
+                    if (SUCCEEDED(hResult))
+                    {
+                        MessageBoxW(NULL, pszFilePath, L"File Path", MB_OK);
+                        CoTaskMemFree(pszFilePath);
+                        stringFilePath == pszFilePath;
+                    }
+                    pItem->Release();
+                }
+            }
+            pFileOpen->Release();
+        }
+        CoUninitialize();
+    }
+    return stringFilePath;
+    
+};

src/render/GUIFunction.h

@@ -0,0 +1,27 @@
+#pragma once
+
+#include <cstdio>
+#include <string>
+
+#include <shobjidl.h>
+#include <windows.h>
+class GUIFunction
+{
+public:
+	GUIFunction();
+	~GUIFunction();
+
+	PWSTR openFileFolderDialog(HINSTANCE hInstance, HINSTANCE, PWSTR pCmdLine, int nCmdShow);
+	private:
+		PWSTR stringFilePath;
+};
+
+GUIFunction::GUIFunction()
+{
+}
+
+GUIFunction::~GUIFunction()
+{
+}
+
+