private bool HandleWindowEvent(IntPtr hwnd, Win32MessageType uMsg, IntPtr wParam, IntPtr lParam)
{
if (!windows.TryGetValue(hwnd, out var window))
{
return(false);
}
uint wParam32 = (uint)wParam.ToInt64();
uint lParam32 = (uint)lParam.ToInt64();
return(Win32EventHandler.HandleWindowEvent(window, uMsg, wParam32, lParam32));
}
private static void HandleActivate(Win32Window window, Win32MessageType messageType, uint wParam, uint lParam)
{
bool activated = (wParam & 0xFFFF) != 0;
if (activated)
{
window.StartupInfo.OnActivated();
}
else
{
window.StartupInfo.OnDeactivated();
}
}
public static bool HandleWindowEvent(Win32Window window, Win32MessageType messageType, uint wParam, uint lParam)
{
int messageTypeIndex = (int)messageType;
if (messageTypeIndex < 0 || messageTypeIndex >= eventHandlers.Length)
{
return(false);
}
HandleWin32Event eventHandler = eventHandlers[messageTypeIndex];
if (eventHandler == null)
{
return(false);
}
eventHandler(window, messageType, wParam, lParam);
return(true);
}
public static extern LRESULT DefWindowProcW(
HWND hWnd,
Win32MessageType uMsg,
WPARAM wParam,
LPARAM lParam
);
private IntPtr WindowProc(IntPtr hwnd, Win32MessageType uMsg, IntPtr wParam, IntPtr lParam)
{
if (HandleWindowEvent(hwnd, uMsg, wParam, lParam))
{
return(IntPtr.Zero);
}
if (uMsg == Win32MessageType.WM_SETCURSOR)
{
uint lParam32 = (uint)lParam.ToInt64();
var hitTest = (Win32HitTestResult)(lParam32 & 0xFFFF);
if (hitTest == Win32HitTestResult.HTCLIENT)
{
IntPtr cursor = Win32API.LoadImageW(
IntPtr.Zero,
Win32SystemResources.IDC_ARROW,
Win32ImageType.IMAGE_CURSOR,
0, 0,
Win32LoadImageFlags.LR_DEFAULTSIZE | Win32LoadImageFlags.LR_SHARED
);
if (cursor != IntPtr.Zero)
{
Win32API.SetCursor(cursor);
return(IntPtr.Zero);
}
}
}
if (uMsg == Win32MessageType.WM_DESTROY)
{
windows.Remove(hwnd);
Win32API.PostQuitMessage(0);
return(IntPtr.Zero);
}
if (uMsg == Win32MessageType.WM_MOUSEMOVE)
{
if (windows.TryGetValue(hwnd, out var window))
{
uint wParam32 = (uint)wParam.ToInt64();
uint lParam32 = (uint)lParam.ToInt64();
int x = (short)(lParam32 & 0xFFFF);
int y = (short)((lParam32 >> 16) & 0xFFFF);
window.StartupInfo.OnMouseMove(new Point(x, y));
}
return(IntPtr.Zero);
}
if (uMsg == Win32MessageType.WM_CHAR)
{
if (windows.TryGetValue(hwnd, out var window))
{
char c = (char)wParam.ToInt64();
if (!char.IsControl(c))
{
window.StartupInfo.OnTextInput(c.ToString());
}
}
return(IntPtr.Zero);
}
if (uMsg == Win32MessageType.WM_PAINT)
{
PAINTSTRUCT ps = new PAINTSTRUCT();
IntPtr hdc = Win32API.BeginPaint(hwnd, ref ps);
try
{
if (windows.TryGetValue(hwnd, out var window))
{
Rectangle area = new Rectangle(ps.rcPaint.left, ps.rcPaint.top, ps.rcPaint.Width, ps.rcPaint.Height);
using (Win32Bitmap bitmap = Win32Bitmap.Create(hdc, area.Width, area.Height))
{
using (Win32Canvas canvas = graphics.CreateCanvas(bitmap, new Point(-area.X, -area.Y)))
{
window.StartupInfo.OnPaint(canvas, area);
}
bitmap.CopyTo(hdc, area.X, area.Y);
}
}
}
finally
{
Win32API.EndPaint(hwnd, ref ps);
}
return(IntPtr.Zero);
}
if (uMsg == Win32MessageType.WM_SIZE)
{
if (windows.TryGetValue(hwnd, out var window))
{
ulong lParam32 = (uint)lParam.ToInt64();
int width = (short)(lParam32 & 0xFFFF);
int height = (short)((lParam32 >> 16) & 0xFFFF);
window.StartupInfo.OnResize(new Size(width, height));
}
return(IntPtr.Zero);
}
return(Win32API.DefWindowProcW(hwnd, uMsg, wParam, lParam));
}
private static void HandleMouseButtonDown(NMouseButton mouseButton, Win32Window window, Win32MessageType messageType, uint wParam, uint lParam)
{
int x = (short)(lParam & 0xFFFF);
int y = (short)((lParam >> 16) & 0xFFFF);
Win32API.SetCapture(window.WindowHandle);
window.StartupInfo.OnMouseButtonDown(mouseButton, new Point(x, y), GetModifierKey());
}
private static void HandleXMouseButtonDown(Win32Window window, Win32MessageType messageType, uint wParam, uint lParam)
{
HandleMouseButtonDown(GetXMouseButton(wParam), window, messageType, wParam, lParam);
}
private static void HandleRightMouseButtonDown(Win32Window window, Win32MessageType messageType, uint wParam, uint lParam)
{
HandleMouseButtonDown(NMouseButton.Right, window, messageType, wParam, lParam);
}
private static void HandleKeyUp(Win32Window window, Win32MessageType messageType, uint wParam, uint lParam)
{
window.StartupInfo.OnKeyUp(Win32KeyMap.GetKeyCode(lParam, wParam));
}
private static void HandleKeyDown(Win32Window window, Win32MessageType messageType, uint wParam, uint lParam)
{
bool autoRepeat = (lParam & 0x40000000) != 0;
window.StartupInfo.OnKeyDown(Win32KeyMap.GetKeyCode(lParam, wParam), GetModifierKey(), autoRepeat);
}
private static void HandleMouseButtonUp(NMouseButton mouseButton, Win32Window window, Win32MessageType messageType, uint wParam, uint lParam)
{
int x = (short)(lParam & 0xFFFF);
int y = (short)((lParam >> 16) & 0xFFFF);
if (!AnyMouseButtonIsDown())
{
Win32API.ReleaseCapture();
}
window.StartupInfo.OnMouseButtonUp(mouseButton, new Point(x, y));
}
private static void HandleMiddleMouseButtonUp(Win32Window window, Win32MessageType messageType, uint wParam, uint lParam)
{
HandleMouseButtonUp(NMouseButton.Middle, window, messageType, wParam, lParam);
}