private void WmGetMinMaxInfo(System.IntPtr hwnd, System.IntPtr lParam)
{
NativeMethods.MINMAXINFO mmi = (NativeMethods.MINMAXINFO)Marshal.PtrToStructure(lParam, typeof(NativeMethods.MINMAXINFO));
// Adjust the maximized size and position to fit the work area of the correct monitor
System.IntPtr monitor = NativeMethods.GetMonitorFromWindow(hwnd);
// MinHeight and MinWidth need to be scaled from Virtual Pixels back to Logical Pixels
DpiScale dpiScale = VirtualPixelScale;
if (monitor != System.IntPtr.Zero)
{
NativeMethods.MONITORINFO monitorInfo = new NativeMethods.MONITORINFO();
NativeMethods.GetMonitorInfo(monitor, monitorInfo);
NativeMethods.RECT rcWorkArea = monitorInfo.rcWork;
NativeMethods.RECT rcMonitorArea = monitorInfo.rcMonitor;
mmi.ptMaxPosition.x = Math.Abs(rcWorkArea.left - rcMonitorArea.left);
mmi.ptMaxPosition.y = Math.Abs(rcWorkArea.top - rcMonitorArea.top);
mmi.ptMaxSize.x = DoubleToInt32(Math.Abs(rcWorkArea.right - rcWorkArea.left));
mmi.ptMaxSize.y = DoubleToInt32(Math.Abs(rcWorkArea.bottom - rcWorkArea.top));
// After much research, it appears that the MaxTrackSize is used for secondary monitors
// while MaxSize is used for the primary monitor.
mmi.ptMaxTrackSize.x = DoubleToInt32(Math.Abs(rcWorkArea.right - rcWorkArea.left));
mmi.ptMaxTrackSize.y = DoubleToInt32(Math.Abs(rcWorkArea.bottom - rcWorkArea.top));
mmi.ptMinTrackSize.x = GetMinWidthInScreenPixels(dpiScale);
mmi.ptMinTrackSize.y = GetMinHeightInScreenPixels(dpiScale);
}
Marshal.StructureToPtr(mmi, lParam, true);
}
public static Tuple <double, double, double, double> GetWorkingAreaForMonitor(IntPtr monitor)
{
NativeMethods.MONITORINFO monitorInfo = new NativeMethods.MONITORINFO();
NativeMethods.GetMonitorInfo(monitor, monitorInfo);
NativeMethods.RECT rcWorkArea = monitorInfo.rcWork;
NativeMethods.RECT rcMonitorArea = monitorInfo.rcMonitor;
return(new Tuple <double, double, double, double>(rcWorkArea.left, rcWorkArea.top, rcWorkArea.width, rcWorkArea.height));
}
/// <summary>
/// Returns the working area of the monitor that intersects most with the specified rectangle.
/// If no monitor can be found, the closest monitor to the rectangle is returned.
/// </summary>
/// <param name="rectangle">The rectangle that is located on the monitor whose working area should be returned.</param>
/// <returns>A rectangle defining the working area of the monitor closest to containing the specified rectangle.</returns>
public static Rectangle GetWorkingArea(Rectangle rectangle)
{
NativeMethods.RECT rect = (NativeMethods.RECT)rectangle;
IntPtr monitorhandle = NativeMethods.MonitorFromRect(ref rect, NativeMethods.MONITOR_DEFAULTTONEAREST);
NativeMethods.MONITORINFO monitorinfo = new NativeMethods.MONITORINFO();
monitorinfo.cbSize = (uint)Marshal.SizeOf(monitorinfo);
bool result = NativeMethods.GetMonitorInfo(monitorhandle, ref monitorinfo);
if (!result)
{
throw new Exception("Failed to retrieve monitor information.");
}
return(monitorinfo.rcWork);
}
private void WmGetMinMaxInfo(ref Message m)
{
var mmi = (NativeMethods.MINMAXINFO)Marshal.PtrToStructure(m.LParam, typeof(NativeMethods.MINMAXINFO));
IntPtr monitor = UnsafeNativeMethods.MonitorFromWindow(m.HWnd, NativeMethods.MONITOR_DEFAULTTONEAREST);
if (monitor != IntPtr.Zero)
{
var mInfo = new NativeMethods.MONITORINFO();
mInfo.cbSize = Marshal.SizeOf(typeof(NativeMethods.MONITORINFO));
UnsafeNativeMethods.GetMonitorInfo(monitor, ref mInfo);
mmi.ptMaxPosition.X = Math.Abs(mInfo.rcWork.left - mInfo.rcMonitor.left);
mmi.ptMaxPosition.Y = Math.Abs(mInfo.rcWork.top - mInfo.rcMonitor.top);
mmi.ptMaxSize.X = Math.Abs(mInfo.rcWork.right - mInfo.rcWork.left);
mmi.ptMaxSize.Y = Math.Abs(mInfo.rcWork.bottom - mInfo.rcWork.top);
}
Marshal.StructureToPtr(mmi, m.LParam, true);
}
internal static void FindMaximumSingleMonitorRectangle(NativeMethods.RECT windowRect, out NativeMethods.RECT screenSubRect, out NativeMethods.RECT monitorRect)
{
List <NativeMethods.RECT> rects = new List <NativeMethods.RECT>();
NativeMethods.EnumDisplayMonitors(IntPtr.Zero, IntPtr.Zero, delegate(IntPtr hMonitor, IntPtr hdcMonitor, ref NativeMethods.RECT rect, IntPtr lpData)
{
NativeMethods.MONITORINFO mONITORINFO = default(NativeMethods.MONITORINFO);
mONITORINFO.cbSize = (uint)Marshal.SizeOf(typeof(NativeMethods.MONITORINFO));
NativeMethods.GetMonitorInfo(hMonitor, ref mONITORINFO);
rects.Add(mONITORINFO.rcWork);
return(true);
}, IntPtr.Zero);
long num = 0L;
screenSubRect = new NativeMethods.RECT
{
Left = 0,
Right = 0,
Top = 0,
Bottom = 0
};
monitorRect = new NativeMethods.RECT
{
Left = 0,
Right = 0,
Top = 0,
Bottom = 0
};
foreach (NativeMethods.RECT current in rects)
{
NativeMethods.RECT rECT = current;
NativeMethods.RECT rECT2;
NativeMethods.IntersectRect(out rECT2, ref rECT, ref windowRect);
long num2 = (long)(rECT2.Width * rECT2.Height);
if (num2 > num)
{
screenSubRect = rECT2;
monitorRect = current;
num = num2;
}
}
}
/// <summary>
/// Returns the working area of the monitor that intersects most with the specified rectangle.
/// If no monitor can be found, the closest monitor to the rectangle is returned.
/// </summary>
/// <param name="rectangle">The rectangle that is located on the monitor whose working area should be returned.</param>
/// <returns>A rectangle defining the working area of the monitor closest to containing the specified rectangle.</returns>
public static Rect GetWorkingArea(Rect rectangle)
{
NativeMethods.RECT rect = (NativeMethods.RECT)rectangle;
IntPtr monitorhandle = NativeMethods.MonitorFromRect(ref rect, NativeMethods.MONITOR_DEFAULTTONEAREST);
NativeMethods.MONITORINFO monitorinfo = new NativeMethods.MONITORINFO();
monitorinfo.cbSize = (uint)Marshal.SizeOf(monitorinfo);
bool result = NativeMethods.GetMonitorInfo(monitorhandle, ref monitorinfo);
if (!result)
throw new Exception("Failed to retrieve monitor information.");
return monitorinfo.rcWork;
}
internal static extern bool GetMonitorInfo(IntPtr hMonitor, ref NativeMethods.MONITORINFO monitorInfo);
public static extern bool GetMonitorInfo(IntPtr hMonitor, [In, Out] ref NativeMethods.MONITORINFO lpmi);
public static void GetMonitorInfo(IntPtr hMonitor, out NativeMethods.MONITORINFO mi)
{
mi = new NativeMethods.MONITORINFO();
ThrowLastError(SafeNativeMethods.GetMonitorInfo(hMonitor, ref mi));
}
