257 lines
9.9 KiB
C#
257 lines
9.9 KiB
C#
// This code is in the Public Domain. It is provided "as is"
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// without express or implied warranty of any kind.
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using System;
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using System.Collections.Generic;
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using System.Text;
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using System.Diagnostics;
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using System.Drawing;
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using System.Threading;
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using OpenTK;
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using OpenTK.Graphics.OpenGL;
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using OpenTK.Input;
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namespace Examples.Tests
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{
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[Example("GameWindow States", ExampleCategory.OpenTK, "GameWindow", 4, Documentation = "GameWindowStates")]
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public class GameWindowStates : GameWindow
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{
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static readonly Font TextFont = new Font(FontFamily.GenericSansSerif, 11);
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Bitmap TextBitmap = new Bitmap(512, 512);
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int texture;
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bool mouse_in_window = false;
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bool viewport_changed = true;
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bool refresh_text = true;
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MouseState mouse, mouse_old;
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KeyboardState keyboard, keyboard_old;
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public GameWindowStates()
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: base(800, 600)
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{
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VSync = VSyncMode.On;
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Keyboard.KeyRepeat = true;
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Keyboard.KeyDown += KeyDownHandler;
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MouseEnter += delegate { mouse_in_window = true; };
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MouseLeave += delegate { mouse_in_window = false; };
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Move += delegate { refresh_text = true; };
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Resize += delegate { refresh_text = true; };
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WindowBorderChanged += delegate { refresh_text = true; };
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WindowStateChanged += delegate { refresh_text = true; };
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FocusedChanged += delegate { refresh_text = true; };
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Mouse.Move += MouseMoveHandler;
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Mouse.ButtonDown += MouseButtonHandler;
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Mouse.ButtonUp += MouseButtonHandler;
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}
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void KeyDownHandler(object sender, KeyboardKeyEventArgs e)
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{
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switch (e.Key)
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{
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case OpenTK.Input.Key.Escape:
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if (!CursorVisible)
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CursorVisible = true;
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else
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Exit();
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break;
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case Key.Number1: WindowState = WindowState.Normal; break;
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case Key.Number2: WindowState = WindowState.Maximized; break;
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case Key.Number3: WindowState = WindowState.Fullscreen; break;
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case Key.Number4: WindowState = WindowState.Minimized; break;
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case Key.Number5: WindowBorder = WindowBorder.Resizable; break;
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case Key.Number6: WindowBorder = WindowBorder.Fixed; break;
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case Key.Number7: WindowBorder = WindowBorder.Hidden; break;
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case Key.Left: X = X - 16; break;
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case Key.Right: X = X + 16; break;
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case Key.Up: Y = Y - 16; break;
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case Key.Down: Y = Y + 16; break;
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case Key.KeypadPlus:
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case Key.Plus: Size += new Size(16, 16); break;
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case Key.KeypadMinus:
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case Key.Minus: Size -= new Size(16, 16); break;
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}
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}
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void MouseMoveHandler(object sender, MouseMoveEventArgs e)
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{
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refresh_text = true;
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}
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void MouseButtonHandler(object sender, MouseButtonEventArgs e)
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{
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refresh_text = true;
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if (e.Button == MouseButton.Left && e.IsPressed)
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{
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CursorVisible = false;
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}
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}
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static int Clamp(int val, int min, int max)
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{
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return val > max ? max : val < min ? min : val;
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}
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static void DrawString(Graphics gfx, string str, int line)
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{
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gfx.DrawString(str, TextFont, Brushes.White, new PointF(0, line * TextFont.Height));
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}
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static void DrawString(Graphics gfx, string str, int line, float offset)
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{
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gfx.DrawString(str, TextFont, Brushes.White, new PointF(offset, line * TextFont.Height));
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}
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static void DrawKeyboard(Graphics gfx, KeyboardState keyboard, int line)
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{
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const string str = "Keys pressed:";
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float space = gfx.MeasureString(" ", TextFont).Width;
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float offset = gfx.MeasureString(str, TextFont).Width + space;
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DrawString(gfx, str, line);
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for (int i = 0; i < (int)Key.LastKey; i++)
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{
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Key k = (Key)i;
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if (keyboard[k])
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{
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string key = k.ToString();
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DrawString(gfx, key, line, offset);
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offset += gfx.MeasureString(key, TextFont).Width + space;
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}
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}
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}
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static void DrawMouse(Graphics gfx, MouseState mouse, int line)
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{
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const string str = "Buttons pressed:";
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float space = gfx.MeasureString(" ", TextFont).Width;
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float offset = gfx.MeasureString(str, TextFont).Width + space;
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DrawString(gfx, str, line);
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for (int i = 0; i < (int)MouseButton.LastButton; i++)
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{
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MouseButton b = (MouseButton)i;
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if (mouse[b])
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{
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string button = b.ToString();
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DrawString(gfx, button, line, offset);
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offset += gfx.MeasureString(button, TextFont).Width + space;
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}
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}
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}
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protected override void OnUpdateFrame(FrameEventArgs e)
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{
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mouse = OpenTK.Input.Mouse.GetState();
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if (mouse != mouse_old)
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refresh_text = true;
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mouse_old = mouse;
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keyboard = OpenTK.Input.Keyboard.GetState();
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if (keyboard != keyboard_old)
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refresh_text = true;
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keyboard_old = keyboard;
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if (refresh_text)
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{
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refresh_text = false;
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using (Graphics gfx = Graphics.FromImage(TextBitmap))
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{
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int line = 0;
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gfx.Clear(Color.Black);
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gfx.TextRenderingHint = System.Drawing.Text.TextRenderingHint.ClearTypeGridFit;
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DrawString(gfx, String.Format("[1 - 4]: change WindowState (current: {0}).", this.WindowState), line++);
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DrawString(gfx, String.Format("[5 - 7]: change WindowBorder (current: {0}).", this.WindowBorder), line++);
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DrawString(gfx, String.Format("Focused: {0}.", this.Focused), line++);
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DrawString(gfx, String.Format("Mouse {0} window.", mouse_in_window ? "inside" : "outside of"), line++);
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DrawString(gfx, String.Format("Mouse visible: {0}", CursorVisible), line++);
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DrawString(gfx, String.Format("Mouse position (absolute): {0}", new Vector3(Mouse.X, Mouse.Y, Mouse.Wheel)), line++);
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DrawString(gfx, String.Format("Mouse position (relative): {0}", new Vector3(mouse.X, mouse.Y, mouse.WheelPrecise)), line++);
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DrawString(gfx, String.Format("Window.Bounds: {0}", Bounds), line++);
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DrawString(gfx, String.Format("Window.Location: {0}, Size: {1}", Location, Size), line++);
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DrawString(gfx, String.Format("Window.{{X={0}, Y={1}, Width={2}, Height={3}}}", X, Y, Width, Height), line++);
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DrawString(gfx, String.Format("Window.ClientRectangle: {0}", ClientRectangle), line++);
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DrawKeyboard(gfx, keyboard, line++);
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DrawMouse(gfx, mouse, line++);
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}
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}
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System.Drawing.Imaging.BitmapData data = TextBitmap.LockBits(
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new System.Drawing.Rectangle(0, 0, TextBitmap.Width, TextBitmap.Height),
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System.Drawing.Imaging.ImageLockMode.ReadOnly, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
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GL.TexSubImage2D(TextureTarget.Texture2D, 0, 0, 0, TextBitmap.Width, TextBitmap.Height, PixelFormat.Bgra,
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PixelType.UnsignedByte, data.Scan0);
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TextBitmap.UnlockBits(data);
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}
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protected override void OnLoad(EventArgs e)
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{
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base.OnLoad(e);
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GL.ClearColor(Color.MidnightBlue);
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GL.Enable(EnableCap.Texture2D);
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GL.Enable(EnableCap.Blend);
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GL.BlendFunc(BlendingFactorSrc.One, BlendingFactorDest.OneMinusSrcColor);
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texture = GL.GenTexture();
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GL.BindTexture(TextureTarget.Texture2D, texture);
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GL.TexImage2D(TextureTarget.Texture2D, 0, PixelInternalFormat.Rgba, TextBitmap.Width, TextBitmap.Height,
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0, PixelFormat.Bgra, PixelType.UnsignedByte, IntPtr.Zero);
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GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int)All.Nearest);
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GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int)All.Nearest);
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}
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protected override void OnResize(EventArgs e)
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{
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base.OnResize(e);
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viewport_changed = true;
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}
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protected override void OnRenderFrame(FrameEventArgs e)
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{
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base.OnRenderFrame(e);
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if (viewport_changed)
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{
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viewport_changed = false;
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GL.Viewport(0, 0, Width, Height);
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Matrix4 ortho_projection = Matrix4.CreateOrthographicOffCenter(0, Width, Height, 0, -1, 1);
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GL.MatrixMode(MatrixMode.Projection);
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GL.LoadMatrix(ref ortho_projection);
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}
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GL.Clear(ClearBufferMask.ColorBufferBit);
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GL.Begin(BeginMode.Quads);
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GL.TexCoord2(0, 0); GL.Vertex2(0, 0);
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GL.TexCoord2(1, 0); GL.Vertex2(TextBitmap.Width, 0);
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GL.TexCoord2(1, 1); GL.Vertex2(TextBitmap.Width, TextBitmap.Height);
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GL.TexCoord2(0, 1); GL.Vertex2(0, TextBitmap.Height);
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GL.End();
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SwapBuffers();
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}
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public static void Main()
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{
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using (GameWindowStates ex = new GameWindowStates())
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{
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Utilities.SetWindowTitle(ex);
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ex.Run(30.0);
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}
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}
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}
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}
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