raylib/examples/core_mouse_wheel.c

/*******************************************************************************************
*
*   raylib [core] examples - Mouse wheel
*
*   This test has been created using raylib 1.1 (www.raylib.com)
*   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
*
*   Copyright (c) 2014 Ramon Santamaria (Ray San - raysan@raysanweb.com)
*
********************************************************************************************/

#include "raylib.h"

int main()
{
    // Initialization
    //--------------------------------------------------------------------------------------
    int screenWidth = 800;
    int screenHeight = 450;
    
    InitWindow(screenWidth, screenHeight, "raylib [core] example - mouse wheel");
    
    int boxPositionY = screenHeight/2 - 40;
    int scrollSpeed = 4;            // Scrolling speed in pixels
    
    SetTargetFPS(60);
    //--------------------------------------------------------------------------------------
    
    // Main game loop
    while (!WindowShouldClose())    // Detect window close button or ESC key
    {
        // Update
        //----------------------------------------------------------------------------------
        boxPositionY -= (GetMouseWheelMove()*scrollSpeed);
        //----------------------------------------------------------------------------------
        
        // Draw
        //----------------------------------------------------------------------------------
        BeginDrawing();
        
            ClearBackground(RAYWHITE);
            
            DrawRectangle(screenWidth/2 - 40, boxPositionY, 80, 80, MAROON);
            
            DrawText("Use mouse wheel to move the cube up and down!", 10, 10, 20, GRAY);            
            DrawText(FormatText("Box position Y: %03i", boxPositionY), 10, 40, 20, LIGHTGRAY);

        EndDrawing();
        //----------------------------------------------------------------------------------
    }

    // De-Initialization
    //--------------------------------------------------------------------------------------
    CloseWindow();        // Close window and OpenGL context
    //--------------------------------------------------------------------------------------
    
    return 0;
}