Created own window test file

- Still in progress. Dragging it with mouse works but position is not recalculated properly.

examples/window_test/window.c

@@ -0,0 +1,112 @@
+/*******************************************************************************************
+*
+*   window - tool description
+*
+*   LICENSE: zlib/libpng
+*
+*   Copyright (c) 2018 raylib technologies
+*
+**********************************************************************************************/
+
+#include "raylib.h"
+
+#define RAYGUI_IMPLEMENTATION
+#include "raygui.h"
+
+//----------------------------------------------------------------------------------
+// Controls Functions Declaration
+//----------------------------------------------------------------------------------
+
+//------------------------------------------------------------------------------------
+// Program main entry point
+//------------------------------------------------------------------------------------
+int main()
+{
+    // Initialization
+    //---------------------------------------------------------------------------------------
+    int screenWidth = 800;
+    int screenHeight = 600;
+    
+    SetConfigFlags(FLAG_WINDOW_UNDECORATED);
+
+    InitWindow(screenWidth, screenHeight, "window");
+
+    // window: controls initialization
+    //----------------------------------------------------------------------------------
+    bool exitWindow = false;
+    //----------------------------------------------------------------------------------
+    
+    // General variables
+    Vector2 mousePos = { 0 };
+    Vector2 position = { 500, 200 };
+    Vector2 prevPosition = position;
+    Vector2 panOffset = mousePos;
+    bool dragWindow = false;
+
+    SetTargetFPS(120);
+    //--------------------------------------------------------------------------------------
+
+    // Main game loop
+    while (!exitWindow && !WindowShouldClose())    // Detect window close button or ESC key
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+        // TODO: Implement required update logic
+        //----------------------------------------------------------------------------------
+        mousePos = GetMousePosition();
+        
+        if ((CheckCollisionPointRec(mousePos, (Rectangle){ 0, 0, screenWidth, 20 })) && IsMouseButtonPressed(MOUSE_LEFT_BUTTON))
+        {
+            dragWindow = true;
+            panOffset = mousePos;
+        }
+            
+        if (dragWindow)
+        {
+            if (IsMouseButtonDown(MOUSE_LEFT_BUTTON))
+            {
+                position.x = prevPosition.x + (mousePos.x - panOffset.x),
+                position.y = prevPosition.y + (mousePos.y - panOffset.y);
+            }
+
+            if (IsMouseButtonReleased(MOUSE_LEFT_BUTTON)) 
+            {
+                prevPosition = position;
+                dragWindow = false;
+            }
+        }
+        
+        SetWindowPosition(position.x, position.y);
+        // printf("mouse: %f, %f\n", mousePos.x, mousePos.y);
+        // printf("panOffset: %f, %f\n", panOffset.x, panOffset.y);
+        // printf("prevPosition: %f, %f\n", prevPosition.x, prevPosition.y);
+        // printf("position: %f, %f\n\n", position.x, position.y);
+
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+
+            ClearBackground(GetColor(style[DEFAULT_BORDER_COLOR_NORMAL]));
+
+            // raygui: controls drawing
+            //----------------------------------------------------------------------------------
+            
+            exitWindow = GuiWindowBox((Rectangle){ 1, 0, screenWidth - 2, screenHeight - 1 }, "EXAMPLE WINDOW");
+            
+            //----------------------------------------------------------------------------------
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    CloseWindow();        // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+}
+
+//------------------------------------------------------------------------------------
+// Controls Functions Definitions (local)
+//------------------------------------------------------------------------------------