Merge pull request #357 from RobLoach/drawing

Add window::Drawing()

Author: RobLoach

examples/core/core_basic_window.cpp

@@ -41,12 +41,10 @@ int main() {
 
         // Draw
         //----------------------------------------------------------------------------------
-        BeginDrawing();
-        {
+        while (window.Drawing()) {
             window.ClearBackground(RAYWHITE);
             textColor.DrawText("Congrats! You created your first window!", 190, 200, 20);
         }
-        EndDrawing();
         //----------------------------------------------------------------------------------
     }
 

include/Window.hpp

@@ -410,6 +410,38 @@ class Window {
      * @see ::SetConfigFlags
      */
     static void SetConfigFlags(unsigned int flags) { ::SetConfigFlags(flags); }
+
+    /**
+     * Alternates between calling `BeginDrawing()` and `EndDrawing()`.
+     *
+     * @code
+     * while (window.Drawing()) {
+     *     DrawRectangle();
+     * }
+     * @endcode
+     *
+     * @return True if we're within the `BeginDrawing()` scope.
+     */
+    bool Drawing() {
+        if (m_drawing) {
+            EndDrawing();
+            m_drawing = false;
+        }
+        else {
+            BeginDrawing();
+            m_drawing = true;
+        }
+
+        return m_drawing;
+    }
+
+    protected:
+        /**
+         * Handles the internal drawing state for calling either `BeginDrawing()` or `EndDrawing()` from the `Drawing()` function.
+         *
+         * @see Drawing()
+         */
+        bool m_drawing = false;
 };
 } // namespace raylib