Reviewed GuiScrollPanel()

Added example

examples/gui_scroll_panel.c

@@ -0,0 +1,79 @@
+/*******************************************************************************************
+*
+*   raygui - Controls test
+*
+*   TEST CONTROLS:
+*       - GuiScrollPanel()
+*
+*   DEPENDENCIES:
+*       raylib 2.4  - Windowing/input management and drawing.
+*       raygui 2.0  - Immediate-mode GUI controls.
+*
+*   COMPILATION (Windows - MinGW):
+*       gcc -o $(NAME_PART).exe $(FILE_NAME) -I../../src -lraylib -lopengl32 -lgdi32 -std=c99
+*
+*   LICENSE: zlib/libpng
+*
+*   Copyright (c) 2019 Vlad Adrian (@Demizdor) and Ramon Santamaria (@raysan5)
+*
+**********************************************************************************************/
+
+#include "raylib.h"
+
+#define RAYGUI_IMPLEMENTATION
+#include "../src/raygui.h"
+
+//------------------------------------------------------------------------------------
+// Program main entry point
+//------------------------------------------------------------------------------------
+int main()
+{
+    // Initialization
+    //---------------------------------------------------------------------------------------
+    const int screenWidth = 400;
+    const int screenHeight = 450;
+
+    InitWindow(screenWidth, screenHeight, "raygui - GuiScrollPanel()");
+    
+    Rectangle panelRec = { 20,40,200,150 };
+    Rectangle panelContentRec = { 0,0,340,340 };
+    Vector2 panelScroll = { 99, -20 };
+    
+    SetTargetFPS(60);
+    //---------------------------------------------------------------------------------------
+    
+    // Main game loop
+    while (!WindowShouldClose())    // Detect window close button or ESC key
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+        // TODO: Implement required update logic
+        //----------------------------------------------------------------------------------
+
+        // Draw
+        //----------------------------------------------------------------------------------
+		BeginDrawing();
+		
+		ClearBackground(RAYWHITE);
+        
+            DrawText(TextFormat("[%f, %f]", panelScroll.x, panelScroll.y), 4, 4, 20, RED);
+
+            Rectangle view = GuiScrollPanel(panelRec, panelContentRec, &panelScroll);
+
+            BeginScissorMode(view.x, view.y, view.width, view.height);
+                GuiGrid((Rectangle){panelRec.x+panelScroll.x, panelRec.y+panelScroll.y, panelContentRec.width, panelContentRec.height}, 16, 3);
+            EndScissorMode();
+            
+            DrawRectangle(panelRec.x+panelScroll.x, panelRec.y+panelScroll.y, panelContentRec.width, panelContentRec.height, Fade(RED, 0.1));
+                
+		EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    CloseWindow();        // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+}