new example: shapes_rectangle_scaling_mouse

examples/shapes/shapes_rectangle_scaling_mouse.c

@@ -0,0 +1,92 @@
+/*******************************************************************************************
+*
+*   raylib [shapes] example - rectangle scaling by mouse
+*
+*   This example has been created using raylib 2.5 (www.raylib.com)
+*   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
+*
+*   Copyright (c) 2019 Demioz and Ramon Santamaria (@raysan5)
+*
+********************************************************************************************/
+
+#include "raylib.h"
+
+#define MOUSE_SCALE_MARK_SIZE   12
+
+int main()
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    int screenWidth = 800;
+    int screenHeight = 450;
+
+    InitWindow(screenWidth, screenHeight, "raylib [shapes] example - rectangle scaling mouse");
+    
+    Rectangle rec = { 100, 100, 200, 80 };
+    
+    Vector2 mousePosition = { 0 };
+    
+    bool mouseScaleReady = false;
+    bool mouseScaleMode = false;
+    
+    SetTargetFPS(60);
+    //--------------------------------------------------------------------------------------
+
+    // Main game loop
+    while (!WindowShouldClose())    // Detect window close button or ESC key
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+        mousePosition = GetMousePosition();
+        
+        if (CheckCollisionPointRec(mousePosition, rec) && 
+            CheckCollisionPointRec(mousePosition, (Rectangle){ rec.x + rec.width - MOUSE_SCALE_MARK_SIZE, rec.y + rec.height - MOUSE_SCALE_MARK_SIZE, MOUSE_SCALE_MARK_SIZE, MOUSE_SCALE_MARK_SIZE }))
+        {
+            mouseScaleReady = true;
+            if (IsMouseButtonPressed(MOUSE_LEFT_BUTTON)) mouseScaleMode = true;
+        }
+        else mouseScaleReady = false;
+        
+        if (mouseScaleMode)
+        {
+            mouseScaleReady = true;
+            
+            rec.width = (mousePosition.x - rec.x);
+            rec.height = (mousePosition.y - rec.y);
+            
+            if (rec.width < MOUSE_SCALE_MARK_SIZE) rec.width = MOUSE_SCALE_MARK_SIZE;
+            if (rec.height < MOUSE_SCALE_MARK_SIZE) rec.height = MOUSE_SCALE_MARK_SIZE;
+            
+            if (IsMouseButtonReleased(MOUSE_LEFT_BUTTON)) mouseScaleMode = false;
+        }
+        //----------------------------------------------------------------------------------
+
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+
+            ClearBackground(RAYWHITE);
+            
+            DrawText("Scale rectangle dragging from bottom-right corner!", 10, 10, 20, GRAY);
+
+            DrawRectangleRec(rec, Fade(GREEN, 0.5f));
+            
+            if (mouseScaleReady) 
+            {
+                DrawRectangleLinesEx(rec, 1, RED);
+                DrawTriangle((Vector2){ rec.x + rec.width - MOUSE_SCALE_MARK_SIZE, rec.y + rec.height }, 
+                             (Vector2){ rec.x + rec.width, rec.y + rec.height },
+                             (Vector2){ rec.x + rec.width, rec.y + rec.height - MOUSE_SCALE_MARK_SIZE }, RED);
+            }
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------   
+    CloseWindow();        // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+}