From 44e76696ccb25529cbe81f8729f06fc6207f40a3 Mon Sep 17 00:00:00 2001
From: Per Hultqvist <per@hultqvist.nu>
Date: Sun, 3 Nov 2024 17:04:02 +0100
Subject: [PATCH] New example: input_box

---
 examples/text/input_box/main.go | 122 ++++++++++++++++++++++++++++++++
 1 file changed, 122 insertions(+)
 create mode 100644 examples/text/input_box/main.go

diff --git a/examples/text/input_box/main.go b/examples/text/input_box/main.go
new file mode 100644
index 00000000..75d23f07
--- /dev/null
+++ b/examples/text/input_box/main.go
@@ -0,0 +1,122 @@
+/*******************************************************************************************
+ *
+ *   raylib [text] example - Input Box
+ *
+ *   Example originally created with raylib 1.7, last time updated with raylib 3.5
+ *
+ *   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) 2017-2024 Ramon Santamaria (@raysan5)
+ *
+ ********************************************************************************************/
+package main
+
+import (
+	"fmt"
+
+	rl "github.com/gen2brain/raylib-go/raylib"
+)
+
+const (
+	screenWidth   = 800
+	screenHeight  = 450
+	maxInputChars = 9
+)
+
+func main() {
+	rl.InitWindow(screenWidth, screenHeight, "raylib [text] example - input box")
+
+	var name [maxInputChars]rune
+	var letterCount, framesCounter int32
+	var mouseOnText bool
+
+	textBox := rl.Rectangle{X: screenWidth/2.0 - 100, Y: 180, Width: 225, Height: 50}
+
+	rl.SetTargetFPS(60) // Set our game to run at 60 frames-per-second
+
+	for !rl.WindowShouldClose() { // Detect window close button or ESC key
+		// Update
+		mouseOnText = rl.CheckCollisionPointRec(rl.GetMousePosition(), textBox)
+
+		if mouseOnText {
+			// Set the window's cursor to the I-Beam
+			rl.SetMouseCursor(rl.MouseCursorIBeam)
+
+			// Get char pressed (unicode character) on the queue
+			key := rl.GetCharPressed()
+
+			// Check if more characters have been pressed on the same frame
+			for key > 0 {
+				// NOTE: Only allow keys in range [32..125]
+				if (key >= 32) && (key <= 125) && (letterCount < maxInputChars) {
+					name[letterCount] = key
+					letterCount++
+				}
+
+				key = rl.GetCharPressed() // Check next character in the queue
+			}
+
+			if rl.IsKeyPressed(rl.KeyBackspace) {
+				letterCount--
+				if letterCount < 0 {
+					letterCount = 0
+				}
+				name[letterCount] = 0
+			}
+		} else {
+			rl.SetMouseCursor(rl.MouseCursorDefault)
+		}
+
+		if mouseOnText {
+			framesCounter++
+		} else {
+			framesCounter = 0
+		}
+
+		// Draw
+		rl.BeginDrawing()
+		rl.ClearBackground(rl.RayWhite)
+
+		rl.DrawText("PLACE MOUSE OVER INPUT BOX!", 240, 140, 20, rl.Gray)
+
+		rl.DrawRectangleRec(textBox, rl.LightGray)
+		col := rl.DarkGray
+		if mouseOnText {
+			col = rl.Red
+		}
+		rl.DrawRectangleLines(int32(textBox.X), int32(textBox.Y), int32(textBox.Width), int32(textBox.Height), col)
+
+		rl.DrawText(getString(name), int32(textBox.X)+5, int32(textBox.Y)+8, 40, rl.Maroon)
+		text := fmt.Sprintf("INPUT CHARS: %d/%d", letterCount, maxInputChars)
+		rl.DrawText(text, 315, 250, 20, rl.DarkGray)
+
+		if mouseOnText {
+			if letterCount < maxInputChars {
+				// Draw blinking underscore char
+				if ((framesCounter / 20) % 2) == 0 {
+					x := int32(textBox.X) + 8 + rl.MeasureText(getString(name), 40)
+					rl.DrawText("_", x, int32(textBox.Y)+12, 40, rl.Maroon)
+				}
+			} else {
+				rl.DrawText("Press BACKSPACE to delete chars...", 230, 300, 20, rl.Gray)
+			}
+		}
+
+		rl.EndDrawing()
+	}
+
+	// De-Initialization
+	rl.CloseWindow() // Close window and OpenGL context
+}
+
+func getString(r [maxInputChars]rune) string {
+	var s string
+	for _, char := range r {
+		if char == 0 {
+			return s
+		}
+		s += string(char)
+	}
+	return s
+}