From eff176bb13d58eda0444b57104229e22625b5af6 Mon Sep 17 00:00:00 2001
From: Oliver 'kfsone' Smith <oliver@kfs.org>
Date: Wed, 24 Feb 2021 12:18:45 -0800
Subject: [PATCH] Added [optional] 'Clicked' state and GetInteractionState
 function

---
 raygui/raygui.go | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/raygui/raygui.go b/raygui/raygui.go
index 4e6c2c8..9ea0b17 100644
--- a/raygui/raygui.go
+++ b/raygui/raygui.go
@@ -2,6 +2,10 @@
 
 package raygui
 
+import (
+	rl "github.com/gen2brain/raylib-go/raylib"
+)
+
 // GUI controls states
 type ControlState int
 
@@ -13,4 +17,31 @@ const (
 	Focused
 	// Pressed indicates the mouse is hovering over the GUI element and LMB is pressed down.
 	Pressed
+	// Clicked indicates the mouse is hovering over the GUI element and LMB has just been released.
+	Clicked
 )
+
+// IsColliding will return true if 'point' is within any of the given rectangles.
+func IsInAny(point rl.Vector2, rectangles ...rl.Rectangle) bool {
+	for _, rect := range rectangles {
+		if rl.CheckCollisionPointRec(point, rect) {
+			return true
+		}
+	}
+	return false
+}
+
+// GetInteractionState determines the current state of a control based on mouse position and
+// button states.
+func GetInteractionState(rectangles ...rl.Rectangle) ControlState {
+	switch {
+	case !IsInAny(rl.GetMousePosition(), rectangles...):
+		return Normal
+	case rl.IsMouseButtonDown(rl.MouseLeftButton):
+		return Pressed
+	case rl.IsMouseButtonReleased(rl.MouseLeftButton) || rl.IsMouseButtonPressed(rl.MouseLeftButton):
+		return Clicked
+	default:
+		return Focused
+	}
+}