private static unsafe void ProcessTextInputEvent(Sdl2NativeWindow window, TextInputEvent ev)
{
// Calculate the length of the typed text string
int length;
for (length = 0; length < TextInputEvent.TextSize && ev.Text[length] != '\0'; length++)
{
;
}
// Make sure we have enough space to decode this string
int decoded_length = Encoding.UTF8.GetCharCount(ev.Text, length);
if (window.DecodeTextBuffer.Length < decoded_length)
{
Array.Resize(
ref window.DecodeTextBuffer,
2 * Math.Max(decoded_length, window.DecodeTextBuffer.Length));
}
// Decode the string from UTF8 to .Net UTF16
fixed(char *pBuffer = window.DecodeTextBuffer)
{
decoded_length = System.Text.Encoding.UTF8.GetChars(
ev.Text,
length,
pBuffer,
window.DecodeTextBuffer.Length);
}
for (int i = 0; i < decoded_length; i++)
{
window.OnKeyPress(window.DecodeTextBuffer[i]);
}
}
private static void ProcessMouseMotionEvent(Sdl2NativeWindow window, MouseMotionEvent ev)
{
float scale = window.ClientSize.Width / (float)window.Size.Width;
window.OnMouseMove(
(int)Math.Round(ev.X * scale),
(int)Math.Round(ev.Y * scale));
Sdl2Mouse.Scale = scale;
}
private static void ProcessKeyEvent(Sdl2NativeWindow window, Event ev)
{
bool key_pressed = ev.Key.State == State.Pressed;
Key key = TranslateKey(ev.Key.Keysym.Scancode);
if (key_pressed)
{
window.OnKeyDown(key, ev.Key.Repeat > 0);
}
else
{
window.OnKeyUp(key);
}
}
private static void ProcessMouseButtonEvent(Sdl2NativeWindow window, MouseButtonEvent ev)
{
bool button_pressed = ev.State == State.Pressed;
// We need MouseUp events to be reported even if they occur
// outside the window. CaptureMouse ensures we get them.
if (!window.is_cursor_grabbed)
{
SDL.CaptureMouse(button_pressed);
}
MouseButton button = Sdl2Mouse.TranslateButton(ev.Button);
if (button_pressed)
{
window.OnMouseDown(button);
}
else
{
window.OnMouseUp(button);
}
}
private static void ProcessWindowEvent(Sdl2NativeWindow window, WindowEvent e)
{
switch (e.Event)
{
case WindowEventID.CLOSE:
var close_args = new System.ComponentModel.CancelEventArgs();
try
{
window.is_in_closing_event = true;
window.OnClosing(close_args);
}
finally
{
window.is_in_closing_event = false;
}
if (!close_args.Cancel)
{
window.OnClosed(EventArgs.Empty);
window.must_destroy = true;
}
break;
case WindowEventID.ENTER:
window.OnMouseEnter(EventArgs.Empty);
break;
case WindowEventID.LEAVE:
window.OnMouseLeave(EventArgs.Empty);
break;
case WindowEventID.EXPOSED:
// do nothing
break;
case WindowEventID.FOCUS_GAINED:
window.is_focused = true;
window.OnFocusedChanged(EventArgs.Empty);
break;
case WindowEventID.FOCUS_LOST:
window.is_focused = false;
window.OnFocusedChanged(EventArgs.Empty);
break;
case WindowEventID.HIDDEN:
window.is_visible = false;
window.OnVisibleChanged(EventArgs.Empty);
break;
case WindowEventID.SHOWN:
window.is_visible = true;
window.OnVisibleChanged(EventArgs.Empty);
break;
case WindowEventID.MAXIMIZED:
window.window_state = WindowState.Maximized;
window.OnWindowStateChanged(EventArgs.Empty);
break;
case WindowEventID.MINIMIZED:
window.previous_window_state = window.window_state;
window.window_state = WindowState.Minimized;
window.OnWindowStateChanged(EventArgs.Empty);
break;
case WindowEventID.RESTORED:
window.window_state = window.previous_window_state;
window.OnWindowStateChanged(EventArgs.Empty);
break;
case WindowEventID.MOVED:
window.OnMove(EventArgs.Empty);
break;
case WindowEventID.RESIZED:
case WindowEventID.SIZE_CHANGED:
window.OnResize(EventArgs.Empty);
break;
default:
Debug.Print("SDL2 unhandled event: {0}", e.Type);
break;
}
}
private static unsafe void ProcessDropEvent(Sdl2NativeWindow window, DropEvent ev)
{
string dropString = PtrToStringAuto(ev.File);
window.OnFileDrop(new[] { dropString });
}
private static void ProcessMouseWheelEvent(Sdl2NativeWindow window, MouseWheelEvent ev)
{
window.OnMouseWheel(ev.X, ev.Y, false);
}
private int ProcessEvent(ref Event ev)
{
bool processed = false;
try
{
Sdl2NativeWindow window = null;
switch (ev.Type)
{
case EventType.WINDOWEVENT:
if (windows.TryGetValue(ev.Window.WindowID, out window))
{
ProcessWindowEvent(window, ev.Window);
processed = true;
}
break;
case EventType.TEXTINPUT:
if (windows.TryGetValue(ev.Text.WindowID, out window))
{
ProcessTextInputEvent(window, ev.Text);
processed = true;
}
break;
case EventType.KEYDOWN:
case EventType.KEYUP:
if (windows.TryGetValue(ev.Key.WindowID, out window))
{
ProcessKeyEvent(window, ev);
processed = true;
}
break;
case EventType.MOUSEBUTTONDOWN:
case EventType.MOUSEBUTTONUP:
if (windows.TryGetValue(ev.Button.WindowID, out window))
{
ProcessMouseButtonEvent(window, ev.Button);
processed = true;
}
break;
case EventType.MOUSEMOTION:
if (windows.TryGetValue(ev.Motion.WindowID, out window))
{
ProcessMouseMotionEvent(window, ev.Motion);
processed = true;
}
break;
case EventType.MOUSEWHEEL:
if (windows.TryGetValue(ev.Wheel.WindowID, out window))
{
ProcessMouseWheelEvent(window, ev.Wheel);
processed = true;
}
break;
case EventType.DROPFILE:
if (windows.TryGetValue(ev.Drop.WindowID, out window))
{
ProcessDropEvent(window, ev.Drop);
SDL.Free(ev.Drop.File);
processed = true;
}
break;
case EventType.QUIT:
Debug.WriteLine("Sdl2 application quit");
break;
}
}
catch (Exception ex)
{
Debug.Print(ex.ToString());
}
return(processed ? 0 : 1);
}