private void SdlRunLoop()
{
Sdl.Event ev;
while (Sdl.PollEvent(out ev) == 1)
{
if (ev.Type == Sdl.EventType.Quit)
{
_isExiting++;
}
else if (ev.Type == Sdl.EventType.JoyDeviceAdded)
{
Joystick.AddDevice(ev.JoystickDevice.Which);
}
else if (ev.Type == Sdl.EventType.ControllerDeviceRemoved)
{
GamePad.RemoveDevice(ev.ControllerDevice.Which);
}
else if (ev.Type == Sdl.EventType.JoyDeviceRemoved)
{
Joystick.RemoveDevice(ev.JoystickDevice.Which);
}
else if (ev.Type == Sdl.EventType.MouseWheel)
{
const int wheelDelta = 120;
Mouse.ScrollY += ev.Wheel.Y * wheelDelta;
Mouse.ScrollX += ev.Wheel.X * wheelDelta;
}
else if (ev.Type == Sdl.EventType.MouseMotion)
{
Window.MouseState.X = ev.Motion.X;
Window.MouseState.Y = ev.Motion.Y;
}
else if (ev.Type == Sdl.EventType.KeyDown)
{
var key = KeyboardUtil.ToXna(ev.Key.Keysym.Sym);
if (!_keys.Contains(key))
{
_keys.Add(key);
}
char character = (char)ev.Key.Keysym.Sym;
if (char.IsControl(character))
{
_view.CallTextInput(character, key);
}
}
else if (ev.Type == Sdl.EventType.KeyUp)
{
var key = KeyboardUtil.ToXna(ev.Key.Keysym.Sym);
_keys.Remove(key);
}
else if (ev.Type == Sdl.EventType.TextInput)
{
int len = 0;
string text = String.Empty;
unsafe
{
while (Marshal.ReadByte((IntPtr)ev.Text.Text, len) != 0)
{
len++;
}
var buffer = new byte[len];
Marshal.Copy((IntPtr)ev.Text.Text, buffer, 0, len);
text = System.Text.Encoding.UTF8.GetString(buffer);
}
if (text.Length == 0)
{
continue;
}
foreach (var c in text)
{
var key = KeyboardUtil.ToXna((int)c);
_view.CallTextInput(c, key);
}
}
else if (ev.Type == Sdl.EventType.DropFile)
{
_view.CallFileDrop(Sdl.GetString(ev.Drop.File));
}
else if (ev.Type == Sdl.EventType.WindowEvent)
{
if (ev.Window.WindowID == _view.Id)
{
if (ev.Window.EventID == Sdl.Window.EventId.Resized || ev.Window.EventID == Sdl.Window.EventId.SizeChanged)
{
_view.ClientResize(ev.Window.Data1, ev.Window.Data2);
}
else if (ev.Window.EventID == Sdl.Window.EventId.FocusGained)
{
IsActive = true;
}
else if (ev.Window.EventID == Sdl.Window.EventId.FocusLost)
{
IsActive = false;
}
else if (ev.Window.EventID == Sdl.Window.EventId.Moved)
{
_view.Moved();
}
else if (ev.Window.EventID == Sdl.Window.EventId.Close)
{
_isExiting++;
}
}
}
}
}
private void SdlRunLoop()
{
Sdl.Event ev;
while (Sdl.PollEvent(out ev) == 1)
{
if (ev.Type == Sdl.EventType.Quit)
{
_isExiting++;
}
else if (ev.Type == Sdl.EventType.JoyDeviceAdded)
{
Joystick.AddDevice(ev.JoystickDevice.Which);
}
else if (ev.Type == Sdl.EventType.ControllerDeviceRemoved)
{
GamePad.RemoveDevice(ev.ControllerDevice.Which);
}
else if (ev.Type == Sdl.EventType.JoyDeviceRemoved)
{
Joystick.RemoveDevice(ev.JoystickDevice.Which);
}
else if (ev.Type == Sdl.EventType.MouseWheel)
{
const int wheelDelta = 120;
Mouse.ScrollY += ev.Wheel.Y * wheelDelta;
Mouse.ScrollX += ev.Wheel.X * wheelDelta;
}
else if (ev.Type == Sdl.EventType.MouseMotion)
{
Window.MouseState.X = ev.Motion.X;
Window.MouseState.Y = ev.Motion.Y;
}
else if (ev.Type == Sdl.EventType.KeyDown)
{
var key = KeyboardUtil.ToXna(ev.Key.Keysym.Sym);
if (!_keys.Contains(key))
{
_keys.Add(key);
}
char character = (char)ev.Key.Keysym.Sym;
if (char.IsControl(character))
{
_view.CallTextInput(character, key);
}
}
else if (ev.Type == Sdl.EventType.KeyUp)
{
var key = KeyboardUtil.ToXna(ev.Key.Keysym.Sym);
_keys.Remove(key);
}
else if (ev.Type == Sdl.EventType.TextInput)
{
if (_view.IsTextInputHandled)
{
int len = 0;
int utf8character = 0; // using an int to encode multibyte characters longer than 2 bytes
byte currentByte = 0;
int charByteSize = 0; // UTF8 char lenght to decode
int remainingShift = 0;
unsafe
{
while ((currentByte = Marshal.ReadByte((IntPtr)ev.Text.Text, len)) != 0)
{
// we're reading the first UTF8 byte, we need to check if it's multibyte
if (charByteSize == 0)
{
if (currentByte < 192)
{
charByteSize = 1;
}
else if (currentByte < 224)
{
charByteSize = 2;
}
else if (currentByte < 240)
{
charByteSize = 3;
}
else
{
charByteSize = 4;
}
utf8character = 0;
remainingShift = 4;
}
// assembling the character
utf8character <<= 8;
utf8character |= currentByte;
charByteSize--;
remainingShift--;
if (charByteSize == 0) // finished decoding the current character
{
utf8character <<= remainingShift * 8; // shifting it to full UTF8 scope
// SDL returns UTF8-encoded characters while C# char type is UTF16-encoded (and limited to the 0-FFFF range / does not support surrogate pairs)
// so we need to convert it to Unicode codepoint and check if it's within the supported range
int codepoint = UTF8ToUnicode(utf8character);
if (codepoint >= 0 && codepoint < 0xFFFF)
{
var key = KeyboardUtil.ToXna(codepoint);
_view.CallTextInput((char)codepoint, key);
}
// UTF16 characters beyond 0xFFFF are not supported (and would require a surrogate encoding that is not supported by the char type)
}
len++;
}
}
}
}
else if (ev.Type == Sdl.EventType.WindowEvent)
{
if (ev.Window.WindowID == _view.Id)
{
if (ev.Window.EventID == Sdl.Window.EventId.Resized || ev.Window.EventID == Sdl.Window.EventId.SizeChanged)
{
_view.ClientResize(ev.Window.Data1, ev.Window.Data2);
}
else if (ev.Window.EventID == Sdl.Window.EventId.FocusGained)
{
IsActive = true;
}
else if (ev.Window.EventID == Sdl.Window.EventId.FocusLost)
{
IsActive = false;
}
else if (ev.Window.EventID == Sdl.Window.EventId.Moved)
{
_view.Moved();
}
else if (ev.Window.EventID == Sdl.Window.EventId.Close)
{
_isExiting++;
}
}
}
}
}