added core_input_mouse_drag

examples/core/core_input_mouse_drag.c

@@ -0,0 +1,73 @@
+/*******************************************************************************************
+*
+*   raylib [core] example - input mouse drag
+*
+*   Example complexity rating: [★★☆☆] 2/4
+*
+*   Example originally created with raylib 6.0, last time updated with raylib 6.0
+*
+*   Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
+*   BSD-like license that allows static linking with closed source software
+*
+*   Copyright (c) 2026 tipudeveloper (@tipudeveloper)
+*
+********************************************************************************************/
+
+#include "raylib.h"
+
+int main(void)
+{
+    const int screenWidth = 800;
+    const int screenHeight = 450;
+
+    InitWindow(screenWidth, screenHeight, "raylib [core] example - input mouse drag");
+    SetTargetFPS(60);
+
+    Rectangle rect = { screenWidth / 2 - 50, screenHeight / 2 - 50, 100, 100 };
+    Vector2 mousePosition = { 0.0f, 0.0f };
+    bool dragging = false;
+
+    while (!WindowShouldClose())
+    {
+        mousePosition = GetMousePosition();
+
+        // Begin dragging if the cursor is inside the rectangle when the left button is pressed
+        if (IsMouseButtonPressed(MOUSE_LEFT_BUTTON))
+        {
+            if (CheckCollisionPointRec(mousePosition, rect))
+            {
+                dragging = true;
+            }
+        }
+        else if (IsMouseButtonReleased(MOUSE_LEFT_BUTTON))
+        {
+            // Stop dragging when the button is released
+            dragging = false;
+        }
+
+        if (dragging)
+        {
+            // Keep the rectangle centered on the cursor while dragging
+            rect.x = mousePosition.x - rect.width / 2;
+            rect.y = mousePosition.y - rect.height / 2;
+        }
+
+        // Use one mouse wheel sample per frame to scale the rectangle
+        float wheelMove = GetMouseWheelMove();
+        rect.width += wheelMove * 10.0f;
+        rect.height += wheelMove * 10.0f;
+
+        // Clamp rectangle size so it remains visible
+        if (rect.width < 10) rect.width = 10;
+        if (rect.height < 10) rect.height = 10;
+        if (rect.width > 500) rect.width = 500;
+        if (rect.height > 500) rect.height = 500;
+        BeginDrawing();
+            ClearBackground(RAYWHITE);
+            DrawRectangleRec(rect, RED);
+            DrawText("Drag the rectangle and scale it with the mouse wheel", 10, 10, 20, BLACK);
+        EndDrawing();
+    }
+    CloseWindow();
+    return 0;
+}