public static void CenterWindowToScreen(IntPtr hwnd, bool useWorkArea = true)
{
try
{
IntPtr handle = MonitorFromWindow(GetDesktopWindow(), MONITOR.DEFAULTTONEAREST);
MONITORINFOEXW monInfo = new MONITORINFOEXW(null);
monInfo.cbSize = (uint)Marshal.SizeOf(monInfo);
GetMonitorInfoW(handle, ref monInfo);
var screenRect = useWorkArea ? monInfo.rcWork : monInfo.rcMonitor;
var midX = (monInfo.rcMonitor.right - monInfo.rcMonitor.left) / 2;
var midY = (monInfo.rcMonitor.bottom - monInfo.rcMonitor.top) / 2;
var size = GetWindowSize(hwnd);
var left = midX - (size.Width / 2);
var top = midY - (size.Height / 2);
SetWindowPos(
hwnd,
IntPtr.Zero,
left,
top,
-1,
-1,
SWP.NOACTIVATE | SWP.NOSIZE | SWP.NOZORDER);
}
catch { }
{
}
}
public int GetDisplayRefreshRate()
{
// Get a monitor handle ("HMONITOR") for the window.
// If the window is straddling more than one monitor, Windows will pick the "best" one.
IntPtr hmonitor = MonitorFromWindow(_hwnd, MONITOR_DEFAULTTONEAREST);
if (hmonitor == IntPtr.Zero)
{
return(0);
}
// Get more information about the monitor.
MONITORINFOEXW monitorInfo = new MONITORINFOEXW
{
cbSize = (uint)Marshal.SizeOf <MONITORINFOEXW>()
};
bool bResult = GetMonitorInfoW(hmonitor, ref monitorInfo);
if (!bResult)
{
return(0);
}
// Get display settings from Windows API
bResult = EnumDisplaySettingsW(monitorInfo.szDevice, ENUM_CURRENT_SETTINGS, out DEVMODEW devMode);
if (!bResult)
{
return(0);
}
return((int)devMode.dmDisplayFrequency);
}
private unsafe bool HandleMinMaxSizes(IntPtr lParam)
{
bool isHandled = false;
MINMAXINFO *mmi = (MINMAXINFO *)lParam;
if (!_options.MinimumSize.IsEmpty)
{
mmi->ptMinTrackSize.X = _options.MinimumSize.Width;
mmi->ptMinTrackSize.Y = _options.MinimumSize.Height;
isHandled = true;
}
if (!_options.MaximumSize.IsEmpty)
{
mmi->ptMaxTrackSize.X = _options.MaximumSize.Width;
mmi->ptMaxTrackSize.Y = _options.MaximumSize.Height;
isHandled = true;
}
// https://stackoverflow.com/questions/39816031/maximize-window-maintaining-taskbar-limits
if (_options.WindowFrameless && _options.WindowState == WindowState.Maximize)
{
IntPtr handle = MonitorFromWindow(GetDesktopWindow(), MONITOR.DEFAULTTONEAREST);
MONITORINFOEXW monInfo = new MONITORINFOEXW(null);
monInfo.cbSize = (uint)Marshal.SizeOf(monInfo);
var captionHeight = GetSystemMetrics(SystemMetric.SM_CYCAPTION);
GetMonitorInfoW(handle, ref monInfo);
var workArea = monInfo.rcWork;
var monitorArea = monInfo.rcMonitor;
mmi->ptMaxPosition.X = Math.Abs(workArea.left - monitorArea.left) - captionHeight / 2;
mmi->ptMaxPosition.Y = Math.Abs(workArea.top - monitorArea.top);
mmi->ptMaxSize.X = Math.Abs(workArea.right - workArea.left) + captionHeight;
mmi->ptMaxSize.Y = Math.Abs(workArea.bottom - workArea.top) + captionHeight;
isHandled = true;
}
return(isHandled);
}
private string GetTextForTextBlock()
{
// 1. Get the window handle ("HWND" in Win32 parlance)
WindowInteropHelper helper = new WindowInteropHelper(this);
IntPtr hwnd = helper.Handle;
// 2. Get a monitor handle ("HMONITOR") for the window.
// If the window is straddling more than one monitor, Windows will pick the "best" one.
IntPtr hmonitor = MonitorFromWindow(hwnd, MONITOR_DEFAULTTONEAREST);
if (hmonitor == IntPtr.Zero)
{
return("MonitorFromWindow returned NULL ☹");
}
// 3. Get more information about the monitor.
MONITORINFOEXW monitorInfo = new MONITORINFOEXW();
monitorInfo.cbSize = (uint)Marshal.SizeOf <MONITORINFOEXW>();
bool bResult = GetMonitorInfoW(hmonitor, ref monitorInfo);
if (!bResult)
{
return("GetMonitorInfoW returned FALSE ☹");
}
// 4. Get the current display settings for that monitor, which includes the resolution and refresh rate.
DEVMODEW devMode = new DEVMODEW();
devMode.dmSize = (ushort)Marshal.SizeOf <DEVMODEW>();
bResult = EnumDisplaySettingsW(monitorInfo.szDevice, ENUM_CURRENT_SETTINGS, out devMode);
if (!bResult)
{
return("EnumDisplaySettingsW returned FALSE ☹");
}
// Done!
return(string.Format("{0} x {1} @ {2}hz", devMode.dmPelsWidth, devMode.dmPelsHeight, devMode.dmDisplayFrequency));
}
private (MONITORINFO mi, string device) GetMonitorInfoEx(IntPtr hMonitor)
{
unsafe
{
MONITORINFOEXW miEx = default;
MONITORINFO * pmi = (MONITORINFO *)&miEx;
(*pmi).cbSize = (uint)sizeof(MONITORINFOEXW);
if (!NativeMethods.GetMonitorInfo(new(hMonitor), pmi))
{
try
{
throw new Win32Exception().WithMessage($"Could not read the monitor information for HMONITOR={hMonitor:X8}!");
}
catch (Win32Exception e) when(e.IsInvalidMonitorHandleException() || !IsMonitorValid(hMonitor))
{
throw new InvalidDisplayReferenceException(hMonitor, e);
}
}
char *pszDevice = (char *)&miEx.szDevice;
return(*pmi, new string(pszDevice));
}
}
public static Rectangle FullScreenBounds(Rectangle configuredBounds)
{
try
{
IntPtr handle = MonitorFromWindow(GetDesktopWindow(), MONITOR.DEFAULTTOPRIMARY);
MONITORINFOEXW monInfo = new MONITORINFOEXW(null);
GetMonitorInfoW(handle, ref monInfo);
RECT rect = monInfo.rcMonitor;
if (rect.Width <= 0 || rect.Height <= 0)
{
return(configuredBounds);
}
return(rect);
}
catch { }
{
}
return(configuredBounds);
}
private static extern bool GetMonitorInfoW(
IntPtr hMonitor,
ref MONITORINFOEXW lpmi);
public static extern BOOL GetMonitorInfoW(IntPtr hMonitor, ref MONITORINFOEXW lpmi);
public static partial BOOL GetMonitorInfoW(IntPtr hMonitor, ref MONITORINFOEXW lpmi);
public void HandleNCCalcsize(IntPtr wParam, IntPtr lParam)
{
// lParam is an [in, out] that can be either a RECT* (wParam == FALSE) or an NCCALCSIZE_PARAMS*.
// Since the first field of NCCALCSIZE_PARAMS is a RECT and is the only field we care about
// we can unconditionally treat it as a RECT.
/* DefWindowProc must be called in both the maximized and non-maximized
* cases, otherwise tile/cascade windows won't work */
var nonclient = (RECT)Marshal.PtrToStructure(lParam, typeof(RECT));
DefWindowProcW(_framelessInfo.Handle, WM.NCCALCSIZE, wParam, lParam);
var client = (RECT)Marshal.PtrToStructure(lParam, typeof(RECT));
if (IsMaximized(_framelessInfo.Handle))
{
WINDOWINFO wi = new WINDOWINFO(null);
GetWindowInfo(_framelessInfo.Handle, ref wi);
/* Maximized windows always have a non-client border that hangs over
* the edge of the screen, so the size proposed by WM_NCCALCSIZE is
* fine. Just adjust the top border to remove the window title. */
var rect = new RECT();
rect.left = client.left;
rect.top = (int)(nonclient.top + wi.cyWindowBorders);
rect.right = client.right;
rect.bottom = client.bottom;
IntPtr mon = MonitorFromWindow(_framelessInfo.Handle, MONITOR.DEFAULTTOPRIMARY);
MONITORINFOEXW mi = new MONITORINFOEXW(null);
GetMonitorInfoW(mon, ref mi);
/* If the client rectangle is the same as the monitor's rectangle,
* the shell assumes that the window has gone fullscreen, so it removes
* the topmost attribute from any auto-hide appbars, making them
* inaccessible. To avoid this, reduce the size of the client area by
* one pixel on a certain edge. The edge is chosen based on which side
* of the monitor is likely to contain an auto-hide appbar, so the
* missing client area is covered by it. */
if (rect.AreEqual(mi.rcMonitor))
{
if (HasAutohideAppbar(ABE_BOTTOM, mi.rcMonitor))
{
rect.bottom--;
}
else if (HasAutohideAppbar(ABE_LEFT, mi.rcMonitor))
{
rect.left++;
}
else if (HasAutohideAppbar(ABE_TOP, mi.rcMonitor))
{
rect.top++;
}
else if (HasAutohideAppbar(ABE_RIGHT, mi.rcMonitor))
{
rect.right--;
}
}
Marshal.StructureToPtr(rect, lParam, false);
}
else
{
/* For the non-maximized case, set the output RECT to what it was
* before WM_NCCALCSIZE modified it. This will make the client size the
* same as the non-client size. */
Marshal.StructureToPtr(nonclient, lParam, false);
}
}
