public static extern bool PhysicalToLogicalPoint(NativeMethods.HWND hwnd, ref NativeMethods.POINT pt);
public static extern int GetWindowThreadProcessId(NativeMethods.HWND hWnd, out int lpdwProcessId);
public static extern bool GetWindowPlacement(NativeMethods.HWND hwnd, ref WINDOWPLACEMENT wp);
public static extern int GetWindowLong(NativeMethods.HWND hWnd, int nIndex);
public static extern IntPtr SendMessageTimeout(
NativeMethods.HWND hwnd, int Msg, IntPtr wParam, StringBuilder lParam, int flags, int uTimeout, out IntPtr pResult);
public static extern bool PeekMessage(
ref MSG msg, NativeMethods.HWND hwnd, int nMsgFilterMin, int nMsgFilterMax, int wRemoveMsg);
public static extern bool IsWindowVisible(NativeMethods.HWND hwnd);
public static extern void SwitchToThisWindow(NativeMethods.HWND hwnd, bool fAltTab);
public static extern bool GetWindowRect(NativeMethods.HWND hwnd, out NativeMethods.RECT rc);
public static extern bool IsWindowEnabled(NativeMethods.HWND hwnd);
public static extern bool GetClientRect(NativeMethods.HWND hwnd, out NativeMethods.RECT rc);
public static extern NativeMethods.HWND GetAncestor(NativeMethods.HWND hwnd, int gaFlags);
public static extern IntPtr SendMessage(NativeMethods.HWND hWnd, int nMsg, IntPtr wParam, StringBuilder lParam);
public static extern bool RegisterHotKey(NativeMethods.HWND hWnd, int id, int fsModifiers, int vk);
public static extern bool IsIconic(NativeMethods.HWND hwnd);
public static extern bool UnregisterHotKey(NativeMethods.HWND hWnd, int id);
public static extern int GetClassName(NativeMethods.HWND hWnd, StringBuilder classname, int nMax);
public static extern IntPtr SendMessageTimeout(
NativeMethods.HWND hwnd, int Msg, IntPtr wParam, ref MINMAXINFO lParam, int flags, int uTimeout, out IntPtr pResult);
public static extern int RealGetWindowClass(NativeMethods.HWND hWnd, StringBuilder classname, int nMax);
public static extern int GetMessage(
ref MSG msg, NativeMethods.HWND hwnd, int nMsgFilterMin, int nMsgFilterMax);
internal extern static bool IsChild(NativeMethods.HWND parent, NativeMethods.HWND child);
public static extern bool PostMessage(
NativeMethods.HWND hWnd, int nMsg, IntPtr wParam, IntPtr lParam);
internal static extern int DwmGetWindowAttribute(
NativeMethods.HWND hwnd,
int dwAttributeToGet, //DWMWA_* values
ref int pvAttributeValue,
int cbAttribute);
internal static extern bool SetWindowPos(NativeMethods.HWND hWnd, NativeMethods.HWND hWndInsertAfter, int x, int y, int cx, int cy, int flags);
public HwndTarget(IntPtr hwnd)
{
bool exceptionThrown = true;
AttachToHwnd(hwnd);
try
{
if (EventTrace.IsEnabled(EventTrace.Keyword.KeywordGeneral, EventTrace.Level.Info))
{
EventTrace.EventProvider.TraceEvent(EventTrace.Event.WClientCreateVisual, EventTrace.Keyword.KeywordGeneral, EventTrace.Level.Info, Dispatcher.GetHashCode(), hwnd.ToInt64());
}
_hWnd = NativeMethods.HWND.Cast(hwnd);
// Get the client rectangle...
GetWindowRectsInScreenCoordinates();
// Set device independent resolution to 96 DPI.
// NativeMethods.HDC hdc = NativeMethods.GetDC(_hWnd);
_devicePixelsPerInchX = 96.0f;
_devicePixelsPerInchY = 96.0f;
_lastWakeOrUnlockEvent = DateTime.MinValue;
//
// Determine whether hWnd corresponds to MIL or GDI window.
//
IntPtr hdcW = UnsafeNativeMethods.GetDC(
new HandleRef(this, _hWnd));
if (hdcW == IntPtr.Zero)
{
//
// If we were unable to obtain HDC for the given
// window, assume the default of 96 DPI.
//
_devicePixelsPerInchX = 96.0f;
_devicePixelsPerInchY = 96.0f;
}
else
{
//
// Obtain and cache DPI values for window's HDC.
//
_devicePixelsPerInchX = (double)UnsafeNativeMethods.GetDeviceCaps(
new HandleRef(this, hdcW),
NativeMethods.LOGPIXELSX);
_devicePixelsPerInchY = (double)UnsafeNativeMethods.GetDeviceCaps(
new HandleRef(this, hdcW),
NativeMethods.LOGPIXELSY);
//
// Release DC object.
//
UnsafeNativeMethods.ReleaseDC(
new HandleRef(this, _hWnd),
new HandleRef(this, hdcW));
}
_worldTransform = new MatrixTransform(new Matrix(
_devicePixelsPerInchX * (1.0f / 96.0f), 0,
0, _devicePixelsPerInchY * (1.0f / 96.0f),
0, 0));
//
// Register CompositionTarget with MediaContext.
//
MediaContext.RegisterICompositionTarget(Dispatcher, this);
// Initialize dispatcher timer to work-around a restore issue.
_restoreDT = new DispatcherTimer();
_restoreDT.Tick += new EventHandler(InvalidateSelf);
_restoreDT.Interval = TimeSpan.FromMilliseconds(100);
exceptionThrown = false;
}
finally
{
//
// If exception has occurred after we attached this target to
// the window, we need to detach from this window. Otherwise, window
// will be left in a state when no other HwndTarget can be created
// for it.
//
if(exceptionThrown)
{
#pragma warning suppress 6031 // Return value ignored on purpose.
VisualTarget_DetachFromHwnd(hwnd);
}
}
}
