private void _InitializeCaptionButtonLocation()
{
if (!Standard.Utility.IsOSVistaOrNewer || !Standard.NativeMethods.IsThemeActive())
{
this._LegacyInitializeCaptionButtonLocation();
}
else
{
Standard.TITLEBARINFOEX structure = new Standard.TITLEBARINFOEX {
cbSize = Marshal.SizeOf(typeof(Standard.TITLEBARINFOEX))
};
IntPtr ptr = Marshal.AllocHGlobal(structure.cbSize);
try
{
Marshal.StructureToPtr(structure, ptr, false);
Standard.NativeMethods.ShowWindow(this._messageHwnd.Handle, Standard.SW.SHOW);
Standard.NativeMethods.SendMessage(this._messageHwnd.Handle, Standard.WM.GETTITLEBARINFOEX, IntPtr.Zero, ptr);
structure = (Standard.TITLEBARINFOEX)Marshal.PtrToStructure(ptr, typeof(Standard.TITLEBARINFOEX));
}
finally
{
Standard.NativeMethods.ShowWindow(this._messageHwnd.Handle, Standard.SW.HIDE);
Standard.Utility.SafeFreeHGlobal(ref ptr);
}
Standard.RECT rect = Standard.RECT.Union(structure.rgrect_CloseButton, structure.rgrect_MinimizeButton);
Standard.RECT windowRect = Standard.NativeMethods.GetWindowRect(this._messageHwnd.Handle);
Rect deviceRectangle = new Rect((double)((rect.Left - windowRect.Width) - windowRect.Left), (double)(rect.Top - windowRect.Top), (double)rect.Width, (double)rect.Height);
Rect rect4 = Standard.DpiHelper.DeviceRectToLogical(deviceRectangle);
this.WindowCaptionButtonsLocation = rect4;
}
}
private void _InitializeCaptionButtonLocation()
{
// There is a completely different way to do this on XP.
if (!Utility.IsOSVistaOrNewer || !NativeMethods.IsThemeActive())
{
_LegacyInitializeCaptionButtonLocation();
return;
}
var tbix = new TITLEBARINFOEX { cbSize = Marshal.SizeOf(typeof(TITLEBARINFOEX)) };
IntPtr lParam = Marshal.AllocHGlobal(tbix.cbSize);
try
{
Marshal.StructureToPtr(tbix, lParam, false);
// This might flash a window in the taskbar while being calculated.
// WM_GETTITLEBARINFOEX doesn't work correctly unless the window is visible while processing.
// use SW.SHOWNA instead SW.SHOW to avoid some brief flashing when launched the window
NativeMethods.ShowWindow(_messageHwnd.Handle, SW.SHOWNA);
NativeMethods.SendMessage(_messageHwnd.Handle, WM.GETTITLEBARINFOEX, IntPtr.Zero, lParam);
tbix = (TITLEBARINFOEX)Marshal.PtrToStructure(lParam, typeof(TITLEBARINFOEX));
}
finally
{
NativeMethods.ShowWindow(_messageHwnd.Handle, SW.HIDE);
Utility.SafeFreeHGlobal(ref lParam);
}
// TITLEBARINFOEX has information relative to the screen. We need to convert the containing rect
// to instead be relative to the top-right corner of the window.
RECT rcAllCaptionButtons = RECT.Union(tbix.rgrect_CloseButton, tbix.rgrect_MinimizeButton);
// For all known themes, the RECT for the maximize box shouldn't add anything to the union of the minimize and close boxes.
Assert.AreEqual(rcAllCaptionButtons, RECT.Union(rcAllCaptionButtons, tbix.rgrect_MaximizeButton));
RECT rcWindow = NativeMethods.GetWindowRect(_messageHwnd.Handle);
// Reorient the Top/Right to be relative to the top right edge of the Window.
var deviceCaptionLocation = new Rect(
rcAllCaptionButtons.Left - rcWindow.Width - rcWindow.Left,
rcAllCaptionButtons.Top - rcWindow.Top,
rcAllCaptionButtons.Width,
rcAllCaptionButtons.Height);
Rect logicalCaptionLocation = DpiHelper.DeviceRectToLogical(deviceCaptionLocation);
WindowCaptionButtonsLocation = logicalCaptionLocation;
}