internal static void EnableBlur(Window win)
{
// ウィンドウに半透明のアクリル効果を適用する
var state = AcrylicWindow.GetAcrylicAccentState(win);
SetBlur(win, state);
if (!_internalStateTable.TryGetValue(win, out var _))
{
var windowHelper = new WindowInteropHelper(win);
var source = HwndSource.FromHwnd(windowHelper.Handle);
source.AddHook(WndProc);
// タイトルバーの各種ボタンで利用するコマンドの設定
var closeBinding = new CommandBinding(SystemCommands.CloseWindowCommand, (_, __) => { SystemCommands.CloseWindow(win); });
var minimizeBinding = new CommandBinding(SystemCommands.MinimizeWindowCommand, (_, __) => { SystemCommands.MinimizeWindow(win); });
var maximizeBinding = new CommandBinding(SystemCommands.MaximizeWindowCommand, (_, __) => { SystemCommands.MaximizeWindow(win); });
var restoreBinding = new CommandBinding(SystemCommands.RestoreWindowCommand, (_, __) => { SystemCommands.RestoreWindow(win); });
win.CommandBindings.Add(closeBinding);
win.CommandBindings.Add(minimizeBinding);
win.CommandBindings.Add(maximizeBinding);
win.CommandBindings.Add(restoreBinding);
var internalState = new AcrylicWindowInternalState()
{
RestoringState = WindowRestoringState.Default,
CloseCommand = closeBinding,
MinimizeCommand = minimizeBinding,
MaximizeCommand = maximizeBinding,
RestoreCommand = restoreBinding,
};
_internalStateTable.Add(win, internalState);
// フルスクリーン状態だったら、ウィンドウサイズの訂正をする
if (win.WindowState == WindowState.Maximized)
{
FixMaximizedWindowSize(windowHelper.Handle);
}
// WPFのSizeToContentのバグ対策
// (WindowChrome使用時に、SizeToContentのウィンドウサイズ計算が正しく行われない)
void onContentRendered(object sender, EventArgs e)
{
if (win.SizeToContent != SizeToContent.Manual)
{
win.InvalidateMeasure();
}
win.ContentRendered -= onContentRendered;
InvalidateRect(windowHelper.Handle, IntPtr.Zero, true);
}
win.ContentRendered += onContentRendered;
InvalidateRect(windowHelper.Handle, IntPtr.Zero, true);
}
}
private static void OnAcrylicAccentStateChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
var win = d as Window;
if (win == null)
{
return;
}
var isAcrylic = win is AcrylicWindow || AcrylicWindow.GetEnabled(win);
var newValue = (AcrylicAccentState)e.NewValue;
var oldValue = (AcrylicAccentState)e.OldValue;
if (isAcrylic && newValue != oldValue)
{
AcrylicWindow.SetBlur(win, newValue);
}
}
protected static IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
{
if (msg == WM_ENTERSIZEMOVE)
{
var win = (Window)HwndSource.FromHwnd(hwnd).RootVisual;
var state = AcrylicWindow.GetAcrylicAccentState(win);
var value = AcrylicHelper.SelectAccentState(state);
if (value == AccentState.ACCENT_ENABLE_ACRYLICBLURBEHIND)
{
AcrylicWindow.SetBlur(win, AcrylicAccentState.BlurBehind);
InvalidateRect(hwnd, IntPtr.Zero, true);
}
}
else if (msg == WM_EXITSIZEMOVE)
{
var win = (Window)HwndSource.FromHwnd(hwnd).RootVisual;
var state = AcrylicWindow.GetAcrylicAccentState(win);
AcrylicWindow.SetBlur(win, state);
InvalidateRect(hwnd, IntPtr.Zero, true);
if (win != null && _internalStateTable.TryGetValue(win, out var internalState))
{
internalState.RestoringState = WindowRestoringState.Default;
}
}
else if (msg == WM_GETMINMAXINFO)
{
handled = true;
var hMonitor = MonitorFromWindow(hwnd, MONITOR_DEFAULTTONEAREST);
var monitorInfo = new MONITORINFO
{
cbSize = Marshal.SizeOf(typeof(MONITORINFO))
};
GetMonitorInfo(hMonitor, ref monitorInfo);
var info = (MINMAXINFO)Marshal.PtrToStructure(lParam, typeof(MINMAXINFO));
var workingRectangle = monitorInfo.rcWork;
var monitorRectangle = monitorInfo.rcMonitor;
var win = (Window)HwndSource.FromHwnd(hwnd).RootVisual;
GetDpiForMonitor(hMonitor, MONITOR_DPI_TYPE.MDT_EFFECTIVE_DPI, out var dpiX, out var dpiY);
var maxWidth = win.MaxWidth / 96.0 * dpiX;
var maxHeight = win.MaxHeight / 96.0 * dpiY;
var minWidth = win.MinWidth / 96.0 * dpiX;
var minHeight = win.MinHeight / 96.0 * dpiY;
// ウィンドウ最大化時の位置とサイズを指定
info.ptMaxPosition.x = Math.Abs(workingRectangle.left - monitorRectangle.left);
info.ptMaxPosition.y = Math.Abs(workingRectangle.top - monitorRectangle.top);
info.ptMaxSize.x = (int)Math.Min(Math.Abs(workingRectangle.right - monitorRectangle.left), maxWidth);
info.ptMaxSize.y = (int)Math.Min(Math.Abs(workingRectangle.bottom - monitorRectangle.top), maxHeight);
// ウィンドウのリサイズ可能サイズを設定
info.ptMaxTrackSize.x = (int)Math.Min(info.ptMaxTrackSize.x, maxWidth);
info.ptMaxTrackSize.y = (int)Math.Min(info.ptMaxTrackSize.y, maxHeight);
info.ptMinTrackSize.x = (int)Math.Max(info.ptMinTrackSize.x, minWidth);
info.ptMinTrackSize.y = (int)Math.Max(info.ptMinTrackSize.y, minHeight);
Marshal.StructureToPtr(info, lParam, true);
return(IntPtr.Zero);
}
else if (msg == WM_SIZE && wParam == (IntPtr)SizeEvents.SIZE_MAXIMIZED)
{
FixMaximizedWindowSize(hwnd);
}
else if (msg == WM_SIZE && wParam == (IntPtr)SizeEvents.SIZE_RESTORED)
{
var win = (Window)HwndSource.FromHwnd(hwnd).RootVisual;
if (win != null && _internalStateTable.TryGetValue(win, out var internalState))
{
win.ClearValue(WindowStyleProperty);
if (win.WindowState == WindowState.Maximized &&
internalState.RestoringState == WindowRestoringState.Default)
{
internalState.RestoringState = WindowRestoringState.RestoreMove;
}
if (internalState.RestoringState == WindowRestoringState.Restoring)
{
internalState.RestoringState = WindowRestoringState.Default;
}
}
}
else if (msg == WM_SYSCOMMAND && wParam == (IntPtr)SysCommands.SC_RESTORE)
{
var win = (Window)HwndSource.FromHwnd(hwnd).RootVisual;
if (win != null && _internalStateTable.TryGetValue(win, out var internalState))
{
internalState.RestoringState = WindowRestoringState.Restoring;
}
}
else if (msg == WM_WINDOWPOSCHANGING)
{
var win = (Window)HwndSource.FromHwnd(hwnd).RootVisual;
if (win != null && _internalStateTable.TryGetValue(win, out var internalState))
{
var pos = (WINDOWPOS)Marshal.PtrToStructure(lParam, typeof(WINDOWPOS));
if (internalState.RestoringState == WindowRestoringState.RestoreMove &&
!(pos.x == 0 && pos.y == 0 && pos.cx == 0 && pos.cy == 0))
{
GetCursorPos(out var cur);
pos.y = cur.y - 8;
Marshal.StructureToPtr(pos, lParam, true);
}
}
}
return(IntPtr.Zero);
}