/// <summary>
/// Get the WindowState as the native HWND knows it to be. This isn't necessarily the same as what Window thinks.
/// </summary>
private WindowState GetHwndState()
{
NativeMethods.WINDOWPLACEMENT wpl = new NativeMethods.WINDOWPLACEMENT();
NativeMethods.GetWindowPlacement(handle, wpl);
switch (wpl.showCmd)
{
case NativeMethods.SW_SHOWMINIMIZED: return WindowState.Minimized;
case NativeMethods.SW_SHOWMAXIMIZED: return WindowState.Maximized;
}
return WindowState.Normal;
}
private void SetRoundingRegion(NativeMethods.WINDOWPOS? wp)
{
const int MONITOR_DEFAULTTONEAREST = 0x00000002;
// We're early - WPF hasn't necessarily updated the state of the window.
// Need to query it ourselves.
NativeMethods.WINDOWPLACEMENT wpl = new NativeMethods.WINDOWPLACEMENT();
NativeMethods.GetWindowPlacement(handle, wpl);
if (wpl.showCmd == NativeMethods.SW_SHOWMAXIMIZED && IsDwmEnabled == true)
{
int left;
int top;
if (wp.HasValue)
{
left = wp.Value.x;
top = wp.Value.y;
}
else
{
NativeMethods.Rect r = new NativeMethods.Rect();
NativeMethods.GetWindowRect(handle, ref r);
left = r.Left;
top = r.Top;
}
IntPtr hMon = NativeMethods.MonitorFromWindow(handle, MONITOR_DEFAULTTONEAREST);
NativeMethods.MonitorInfo mi = new NativeMethods.MonitorInfo();
NativeMethods.GetMonitorInfo(hMon, mi);
NativeMethods.Rect rcMax = mi.Work;
// The location of maximized window takes into account the border that Windows was
// going to remove, so we also need to consider it.
rcMax.Left -= left; rcMax.Right -= left;
rcMax.Top -= top; rcMax.Bottom -= top;
IntPtr hrgn = IntPtr.Zero;
try
{
hrgn = NativeMethods.CreateRectRgnIndirect(ref rcMax);
NativeMethods.SetWindowRgn(handle, hrgn, NativeMethods.IsWindowVisible(handle));
hrgn = IntPtr.Zero;
}
finally
{
NativeMethods.DeleteObject(hrgn);
}
}
else
{
Size windowSize;
// Use the size if it's specified.
if (null != wp && !IsFlagSet(wp.Value.flags, NativeMethods.SWP_NOSIZE))
{
windowSize = new Size((double)wp.Value.cx, (double)wp.Value.cy);
}
else if (null != wp && (lastRoundingState == WindowState))
{
return;
}
else
{
NativeMethods.Rect r = new NativeMethods.Rect();
NativeMethods.GetWindowRect(handle, ref r);
Rect rect = new Rect(r.Left, r.Top, r.Right - r.Left, r.Bottom - r.Top);
windowSize = rect.Size;
}
lastRoundingState = WindowState;
IntPtr hrgn = IntPtr.Zero;
try
{
double shortestDimension = Math.Min(windowSize.Width, windowSize.Height);
double topLeftRadius = DpiHelper.LogicalPixelsToDevice(new Point(CornerRadius.TopLeft, 0)).X;
topLeftRadius = Math.Min(topLeftRadius, shortestDimension / 2);
if (IsUniform(CornerRadius))
{
// RoundedRect HRGNs require an additional pixel of padding.
hrgn = CreateRoundRectRgn(new Rect(windowSize), topLeftRadius);
}
else
{
// We need to combine HRGNs for each of the corners.
// Create one for each quadrant, but let it overlap into the two adjacent ones
// by the radius amount to ensure that there aren't corners etched into the middle
// of the window.
hrgn = CreateRoundRectRgn(new Rect(0, 0, windowSize.Width / 2 + topLeftRadius, windowSize.Height / 2 + topLeftRadius), topLeftRadius);
double topRightRadius = DpiHelper.LogicalPixelsToDevice(new Point(CornerRadius.TopRight, 0)).X;
topRightRadius = Math.Min(topRightRadius, shortestDimension / 2);
Rect topRightRegionRect = new Rect(0, 0, windowSize.Width / 2 + topRightRadius, windowSize.Height / 2 + topRightRadius);
topRightRegionRect.Offset(windowSize.Width / 2 - topRightRadius, 0);
CreateAndCombineRoundRectRgn(hrgn, topRightRegionRect, topRightRadius);
double bottomLeftRadius = /*DpiHelper.LogicalPixelsToDevice*/(new Point(CornerRadius.BottomLeft, 0)).X;
bottomLeftRadius = Math.Min(bottomLeftRadius, shortestDimension / 2);
Rect bottomLeftRegionRect = new Rect(0, 0, windowSize.Width / 2 + bottomLeftRadius, windowSize.Height / 2 + bottomLeftRadius);
bottomLeftRegionRect.Offset(0, windowSize.Height / 2 - bottomLeftRadius);
CreateAndCombineRoundRectRgn(hrgn, bottomLeftRegionRect, bottomLeftRadius);
double bottomRightRadius = DpiHelper.LogicalPixelsToDevice(new Point(CornerRadius.BottomRight, 0)).X;
bottomRightRadius = Math.Min(bottomRightRadius, shortestDimension / 2);
Rect bottomRightRegionRect = new Rect(0, 0, windowSize.Width / 2 + bottomRightRadius, windowSize.Height / 2 + bottomRightRadius);
bottomRightRegionRect.Offset(windowSize.Width / 2 - bottomRightRadius, windowSize.Height / 2 - bottomRightRadius);
CreateAndCombineRoundRectRgn(hrgn, bottomRightRegionRect, bottomRightRadius);
}
NativeMethods.SetWindowRgn(handle, hrgn, NativeMethods.IsWindowVisible(handle));
hrgn = IntPtr.Zero;
}
finally
{
// Free the memory associated with the HRGN if it wasn't assigned to the HWND.
NativeMethods.DeleteObject(hrgn);
}
}
}
private void FixRestoreBounds(object sender, EventArgs e)
{
if (WindowState == WindowState.Maximized || WindowState == WindowState.Minimized)
{
// Old versions of WPF sometimes force their incorrect idea of the Window's location
// on the Win32 restore bounds. If we have reason to think this is the case, then
// try to undo what WPF did after it has done its thing.
if (hasUserMovedWindow)
{
hasUserMovedWindow = false;
NativeMethods.WINDOWPLACEMENT wp = new NativeMethods.WINDOWPLACEMENT();
NativeMethods.GetWindowPlacement(handle, wp);
NativeMethods.Rect adjustedDeviceRc = GetAdjustedWindowRect(new NativeMethods.Rect { Bottom = 100, Right = 100 });
Point adjustedTopLeft = DpiHelper.DevicePixelsToLogical(
new Point(
wp.rcNormalPosition.Left - adjustedDeviceRc.Left,
wp.rcNormalPosition.Top - adjustedDeviceRc.Top));
Top = adjustedTopLeft.Y;
Left = adjustedTopLeft.X;
}
}
}
