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// This code is in the Public Domain. It is provided "as is"
// without express or implied warranty of any kind.
using System;
using System.Collections.Generic;
using System.Text;
using System.Diagnostics;
using System.Drawing;
using System.Threading;
using OpenTK;
using OpenTK.Graphics.OpenGL;
using OpenTK.Input;
namespace Examples.Tests
{
[Example("GameWindow states", ExampleCategory.OpenTK, "Test", Documentation = "GameWindowStates")]
public class GameWindowStates : GameWindow
{
static readonly Font TextFont = new Font(FontFamily.GenericSansSerif, 12);
Bitmap TextBitmap = new Bitmap(512, 512);
int texture;
bool mouse_in_window = false;
bool viewport_changed = true;
bool refresh_text = true;
public GameWindowStates()
: base(800, 600)
{
VSync = VSyncMode.On;
Keyboard.KeyRepeat = true;
Keyboard.KeyDown += KeyDownHandler;
MouseEnter += delegate { mouse_in_window = true; };
MouseLeave += delegate { mouse_in_window = false; };
Move += delegate { refresh_text = true; };
Resize += delegate { refresh_text = true; };
WindowBorderChanged += delegate { refresh_text = true; };
WindowStateChanged += delegate { refresh_text = true; };
Mouse.Move += delegate { refresh_text = true; };
}
void KeyDownHandler(object sender, KeyboardKeyEventArgs e)
{
switch (e.Key)
{
case OpenTK.Input.Key.Escape: this.Exit(); break;
case Key.Number1: WindowState = WindowState.Normal; break;
case Key.Number2: WindowState = WindowState.Maximized; break;
case Key.Number3: WindowState = WindowState.Fullscreen; break;
case Key.Number4: WindowState = WindowState.Minimized; break;
case Key.Number5: WindowBorder = WindowBorder.Resizable; break;
case Key.Number6: WindowBorder = WindowBorder.Fixed; break;
case Key.Number7: WindowBorder = WindowBorder.Hidden; break;
case Key.Left: X = X - 16; break;
case Key.Right: X = X + 16; break;
case Key.Up: Y = Y - 16; break;
case Key.Down: Y = Y + 16; break;
case Key.KeypadPlus:
case Key.Plus: Size += new Size(16, 16); break;
case Key.KeypadMinus:
case Key.Minus: Size -= new Size(16, 16); break;
}
}
static int Clamp(int val, int min, int max)
{
return val > max ? max : val < min ? min : val;
}
static void DrawString(Graphics gfx, string str, int line)
{
gfx.DrawString(str, TextFont, Brushes.White, new PointF(0, line * TextFont.Height));
}
protected override void OnUpdateFrame(FrameEventArgs e)
{
if (refresh_text)
{
refresh_text = false;
using (Graphics gfx = Graphics.FromImage(TextBitmap))
{
int line = 0;
gfx.Clear(Color.MidnightBlue);
gfx.TextRenderingHint = System.Drawing.Text.TextRenderingHint.ClearTypeGridFit;
DrawString(gfx, String.Format("[1 - 4]: change WindowState (current: {0}).", this.WindowState), line++);
DrawString(gfx, String.Format("[5 - 7]: change WindowBorder (current: {0}).", this.WindowBorder), line++);
DrawString(gfx, String.Format("Focused: {0}.", this.Focused), line++);
DrawString(gfx, String.Format("Mouse {0} window.", mouse_in_window ? "inside" : "outside of"), line++);
DrawString(gfx, String.Format("Mouse position: {0}", new Vector3(Mouse.X, Mouse.Y, Mouse.Wheel)), line++);
DrawString(gfx, String.Format("Window.Bounds: {0}", Bounds), line++);
DrawString(gfx, String.Format("Window.Location: {0}, Size: {1}", Location, Size), line++);
DrawString(gfx, String.Format("Window.{{X={0}, Y={1}, Width={2}, Height={3}}}", X, Y, Width, Height), line++);
DrawString(gfx, String.Format("Window.ClientRectangle: {0}", ClientRectangle), line++);
}
}
System.Drawing.Imaging.BitmapData data = TextBitmap.LockBits(
new System.Drawing.Rectangle(0, 0, TextBitmap.Width, TextBitmap.Height),
System.Drawing.Imaging.ImageLockMode.ReadOnly, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
GL.TexSubImage2D(TextureTarget.Texture2D, 0, 0, 0, TextBitmap.Width, TextBitmap.Height, PixelFormat.Bgra,
PixelType.UnsignedByte, data.Scan0);
TextBitmap.UnlockBits(data);
}
protected override void OnLoad(EventArgs e)
{
base.OnLoad(e);
GL.ClearColor(Color.MidnightBlue);
GL.Enable(EnableCap.Texture2D);
texture = GL.GenTexture();
GL.BindTexture(TextureTarget.Texture2D, texture);
GL.TexImage2D(TextureTarget.Texture2D, 0, PixelInternalFormat.Rgba, TextBitmap.Width, TextBitmap.Height,
0, PixelFormat.Bgra, PixelType.UnsignedByte, IntPtr.Zero);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int)All.Nearest);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int)All.Nearest);
}
protected override void OnResize(EventArgs e)
{
base.OnResize(e);
viewport_changed = true;
}
protected override void OnRenderFrame(FrameEventArgs e)
{
base.OnRenderFrame(e);
if (viewport_changed)
{
viewport_changed = false;
GL.Viewport(0, 0, Width, Height);
Matrix4 ortho_projection = Matrix4.CreateOrthographicOffCenter(0, Width, Height, 0, -1, 1);
GL.MatrixMode(MatrixMode.Projection);
GL.LoadMatrix(ref ortho_projection);
}
GL.Clear(ClearBufferMask.ColorBufferBit);
GL.Begin(BeginMode.Quads);
GL.TexCoord2(0, 0); GL.Vertex2(0, 0);
GL.TexCoord2(1, 0); GL.Vertex2(TextBitmap.Width, 0);
GL.TexCoord2(1, 1); GL.Vertex2(TextBitmap.Width, TextBitmap.Height);
GL.TexCoord2(0, 1); GL.Vertex2(0, TextBitmap.Height);
GL.End();
SwapBuffers();
}
public static void Main()
{
using (GameWindowStates ex = new GameWindowStates())
{
Utilities.SetWindowTitle(ex);
ex.Run(30.0);
}
}
}
}
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