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feat: backporting existing raylib-cs examples and new official raylib examples to WASM, adopting raylib's original code style

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tiger tiger tiger 2026-07-17 08:22:54 +02:00
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327
Examples/Text/RectangleBounds.cs
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@ -1,153 +1,172 @@
/*******************************************************************************************
*
* raylib [text] example - rectangle bounds
*
* Example complexity rating: [★★★★] 4/4
*
* Example originally created with raylib 2.5, last time updated with raylib 4.0
*
* Example contributed by Vlad Adrian (@demizdor) and reviewed by Ramon Santamaria (@raysan5)
*
* 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) 2018-2025 Vlad Adrian (@demizdor) and Ramon Santamaria (@raysan5)
*
********************************************************************************************/
using System.Numerics;
using static Raylib_cs.Raylib;
namespace Examples.Text;
public class RectangleBounds
public partial class RectangleBounds : IExample
{
public static int Main()
private const int screenWidth = 800;
private const int screenHeight = 450;
// Minimum width and heigh for the container rectangle
private const float minWidth = 60;
private const float minHeight = 60;
private const float maxWidth = screenWidth - 50.0f;
private const float maxHeight = screenHeight - 160.0f;
public string Name => "Text / Rectangle Bounds";
public string Title => "raylib [text] example - rectangle bounds";
private string text;
private bool resizing;
private bool wordWrap;
private Rectangle container;
private Rectangle resizer;
private Vector2 lastMouse;
private Color borderColor;
private Font font;
public void Init()
{
// Initialization
//--------------------------------------------------------------------------------------
const int screenWidth = 800;
const int screenHeight = 450;
text = "Text cannot escape\tthis container\t...word wrap also works when active so here's " +
"a long text for testing.\n\nLorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod " +
"tempor incididunt ut labore et dolore magna aliqua. Nec ullamcorper sit amet risus nullam eget felis eget.";
InitWindow(screenWidth, screenHeight, "raylib [text] example - draw text inside a rectangle");
resizing = false;
wordWrap = true;
string text = "";
text += "Text cannot escape this container ...word wrap also works when active so here's a long text for testing.";
text += "\n\nLorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor ";
text += "incididunt ut labore et dolore magna aliqua. Nec ullamcorper sit amet risus nullam eget felis eget.";
bool resizing = false;
bool wordWrap = true;
Rectangle container = new(25, 25, screenWidth - 50, screenHeight - 250);
Rectangle resizer = new(
container = new(25.0f, 25.0f, screenWidth - 50.0f, screenHeight - 250.0f);
resizer = new(
container.X + container.Width - 17,
container.Y + container.Height - 17,
14,
14
);
// Minimum width and heigh for the container rectangle
const int minWidth = 60;
const int minHeight = 60;
const int maxWidth = screenWidth - 50;
const int maxHeight = screenHeight - 160;
lastMouse = new(0.0f, 0.0f); // Stores last mouse coordinates
borderColor = Color.Maroon; // Container border color
font = GetFontDefault(); // Get default system font
}
Vector2 lastMouse = new(0.0f, 0.0f);
Color borderColor = Color.Maroon;
Font font = GetFontDefault();
SetTargetFPS(60);
//--------------------------------------------------------------------------------------
// Main game loop
while (!WindowShouldClose())
public void Update()
{
// Update
//----------------------------------------------------------------------------------
if (IsKeyPressed(KeyboardKey.Space))
{
// Update
//----------------------------------------------------------------------------------
if (IsKeyPressed(KeyboardKey.Space))
{
wordWrap = !wordWrap;
}
Vector2 mouse = GetMousePosition();
// Check if the mouse is inside the container and toggle border color
if (CheckCollisionPointRec(mouse, container))
{
borderColor = ColorAlpha(Color.Maroon, 0.4f);
}
else if (!resizing)
{
borderColor = Color.Maroon;
}
// Container resizing logic
if (resizing)
{
if (IsMouseButtonReleased(MouseButton.Left))
{
resizing = false;
}
int width = (int)(container.Width + (mouse.X - lastMouse.X));
container.Width = (width > minWidth) ? ((width < maxWidth) ? width : maxWidth) : minWidth;
int height = (int)(container.Height + (mouse.Y - lastMouse.Y));
container.Height = (height > minHeight) ? ((height < maxHeight) ? height : maxHeight) : minHeight;
}
else
{
// Check if we're resizing
if (IsMouseButtonDown(MouseButton.Left) && CheckCollisionPointRec(mouse, resizer))
{
resizing = true;
}
}
// Move resizer rectangle properly
resizer.X = container.X + container.Width - 17;
resizer.Y = container.Y + container.Height - 17;
lastMouse = mouse; // Update mouse
//----------------------------------------------------------------------------------
// Draw
//----------------------------------------------------------------------------------
BeginDrawing();
ClearBackground(Color.RayWhite);
// Draw container border
DrawRectangleLinesEx(container, 3, borderColor);
// Draw text in container (add some padding)
DrawTextBoxed(
font,
text,
new Rectangle(container.X + 4, container.Y + 4, container.Width - 4, container.Height - 4),
20.0f,
2.0f,
wordWrap,
Color.Gray
);
DrawRectangleRec(resizer, borderColor);
// Draw bottom info
DrawRectangle(0, screenHeight - 54, screenWidth, 54, Color.Gray);
DrawRectangleRec(new Rectangle(382, screenHeight - 34, 12, 12), Color.Maroon);
DrawText("Word Wrap: ", 313, screenHeight - 115, 20, Color.Black);
if (wordWrap)
{
DrawText("ON", 447, screenHeight - 115, 20, Color.Red);
}
else
{
DrawText("OFF", 447, screenHeight - 115, 20, Color.Black);
}
DrawText("Press [SPACE] to toggle word wrap", 218, screenHeight - 86, 20, Color.Gray);
DrawText("Click hold & drag the to resize the container", 155, screenHeight - 38, 20, Color.RayWhite);
EndDrawing();
//----------------------------------------------------------------------------------
wordWrap = !wordWrap;
}
// De-Initialization
//--------------------------------------------------------------------------------------
CloseWindow();
//--------------------------------------------------------------------------------------
var mouse = GetMousePosition();
return 0;
// Check if the mouse is inside the container and toggle border color
if (CheckCollisionPointRec(mouse, container))
{
borderColor = Fade(Color.Maroon, 0.4f);
}
else if (!resizing)
{
borderColor = Color.Maroon;
}
// Container resizing logic
if (resizing)
{
if (IsMouseButtonReleased(MouseButton.Left))
{
resizing = false;
}
var width = container.Width + (mouse.X - lastMouse.X);
container.Width = (width > minWidth) ? ((width < maxWidth) ? width : maxWidth) : minWidth;
var height = container.Height + (mouse.Y - lastMouse.Y);
container.Height = (height > minHeight) ? ((height < maxHeight) ? height : maxHeight) : minHeight;
}
else
{
// Check if we're resizing
if (IsMouseButtonDown(MouseButton.Left) && CheckCollisionPointRec(mouse, resizer))
{
resizing = true;
}
}
// Move resizer rectangle properly
resizer.X = container.X + container.Width - 17;
resizer.Y = container.Y + container.Height - 17;
lastMouse = mouse; // Update mouse
//----------------------------------------------------------------------------------
// Draw
//----------------------------------------------------------------------------------
BeginDrawing();
ClearBackground(Color.RayWhite);
DrawRectangleLinesEx(container, 3, borderColor); // Draw container border
// Draw text in container (add some padding)
DrawTextBoxed(
font,
text,
new Rectangle(container.X + 4, container.Y + 4, container.Width - 4, container.Height - 4),
20.0f,
2.0f,
wordWrap,
Color.Gray
);
DrawRectangleRec(resizer, borderColor); // Draw the resize box
// Draw bottom info
DrawRectangle(0, screenHeight - 54, screenWidth, 54, Color.Gray);
DrawRectangleRec(new Rectangle(382, screenHeight - 34, 12, 12), Color.Maroon);
DrawText("Word Wrap: ", 313, screenHeight - 115, 20, Color.Black);
if (wordWrap)
{
DrawText("ON", 447, screenHeight - 115, 20, Color.Red);
}
else
{
DrawText("OFF", 447, screenHeight - 115, 20, Color.Black);
}
DrawText("Press [SPACE] to toggle word wrap", 218, screenHeight - 86, 20, Color.Gray);
DrawText("Click hold & drag the to resize the container", 155, screenHeight - 38, 20, Color.RayWhite);
EndDrawing();
//----------------------------------------------------------------------------------
}
public void Unload()
{
}
// Draw text using font inside rectangle limits
static void DrawTextBoxed(
private static void DrawTextBoxed(
Font font,
string text,
Rectangle rec,
@ -161,7 +180,7 @@ public class RectangleBounds
}
// Draw text using font inside rectangle limits with support for text selection
static unsafe void DrawTextBoxedSelectable(
private static unsafe void DrawTextBoxedSelectable(
Font font,
string text,
Rectangle rec,
@ -175,37 +194,37 @@ public class RectangleBounds
Color selectBackTint
)
{
int length = text.Length;
var length = text.Length;
// Offset between lines (on line break '\n')
float textOffsetY = 0;
// Offset X to next character to draw
float textOffsetX = 0.0f;
var textOffsetX = 0.0f;
// Character rectangle scaling factor
float scaleFactor = fontSize / (float)font.BaseSize;
var scaleFactor = fontSize / (float)font.BaseSize;
// Word/character wrapping mechanism variables
bool shouldMeasure = wordWrap;
var shouldMeasure = wordWrap;
// Index where to begin drawing (where a line begins)
int startLine = -1;
var startLine = -1;
// Index where to stop drawing (where a line ends)
int endLine = -1;
var endLine = -1;
// Holds last value of the character position
int lastk = -1;
var lastk = -1;
using var textNative = new Utf8Buffer(text);
for (int i = 0, k = 0; i < length; i++, k++)
{
// Get next codepoint from byte string and glyph index in font
int codepointByteCount = 0;
int codepoint = GetCodepoint(&textNative.AsPointer()[i], &codepointByteCount);
int index = GetGlyphIndex(font, codepoint);
var codepointByteCount = 0;
var codepoint = GetCodepoint(&textNative.AsPointer()[i], &codepointByteCount);
var index = GetGlyphIndex(font, codepoint);
// NOTE: Normally we exit the decoding sequence as soon as a bad byte is found (and return 0x3f)
// but we need to draw all of the bad bytes using the '?' symbol moving one byte
@ -275,7 +294,7 @@ public class RectangleBounds
glyphWidth = 0;
// Save character position when we switch states
int tmp = lastk;
var tmp = lastk;
lastk = k - 1;
k = tmp;
}
@ -305,7 +324,7 @@ public class RectangleBounds
}
// Draw selection background
bool isGlyphSelected = false;
var isGlyphSelected = false;
if ((selectStart >= 0) && (k >= selectStart) && (k < (selectStart + selectLength)))
{
DrawRectangleRec(
@ -354,4 +373,32 @@ public class RectangleBounds
}
}
}
public static int Main()
{
// Initialization
//--------------------------------------------------------------------------------------
InitWindow(screenWidth, screenHeight, "raylib [text] example - rectangle bounds");
SetTargetFPS(60); // Set our game to run at 60 frames-per-second
//--------------------------------------------------------------------------------------
var game = new RectangleBounds();
game.Init();
// Main game loop
while (!WindowShouldClose()) // Detect window close button or ESC key
{
game.Update();
}
game.Unload();
// De-Initialization
//--------------------------------------------------------------------------------------
CloseWindow(); // Close window and OpenGL context
//--------------------------------------------------------------------------------------
return 0;
}
}