// Returns a Proxy element corresponding to the specified
// screen coordinates.
internal override ProxySimple ElementProviderFromPoint(int x, int y)
{
//
// Send the link an LM_HITTEST message.
//
// Allocate a local hit test info struct.
UnsafeNativeMethods.LHITTESTINFO HitTestInfo = new UnsafeNativeMethods.LHITTESTINFO();
// Fill in the coordinates that we want to check.
HitTestInfo.pt.x = x;
HitTestInfo.pt.y = y;
// Convert screen coordinates to client coordinates.
if (!Misc.MapWindowPoints(IntPtr.Zero, _hwnd, ref HitTestInfo.pt, 1))
{
base.ElementProviderFromPoint(x, y);
}
// Fill in index and state info.
HitTestInfo.item.mask = NativeMethods.LIF_ITEMINDEX | NativeMethods.LIF_STATE;
HitTestInfo.item.iLink = 0;
HitTestInfo.item.stateMask = NativeMethods.LIS_ENABLED;
HitTestInfo.item.state = 0;
bool bGetItemResult;
unsafe
{
// Send the LM_HITTEST message.
bGetItemResult = XSendMessage.XSend(_hwnd, NativeMethods.LM_HITTEST, IntPtr.Zero, new IntPtr(&HitTestInfo), Marshal.SizeOf(HitTestInfo.GetType()));
}
if (bGetItemResult == true && HitTestInfo.item.iLink >= 0 && GetLinkItem(HitTestInfo.item.iLink))
{
return(CreateHyperlinkItem(_linkItem, HitTestInfo.item.iLink));
}
return(base.ElementProviderFromPoint(x, y));
}
// Same as clicking on an hyperlink
void IInvokeProvider.Invoke()
{
// Check that button can be clicked.
//
// @
// Make sure that the control is enabled
if (!SafeNativeMethods.IsWindowEnabled(_hwnd))
{
throw new ElementNotEnabledException();
}
if (!SafeNativeMethods.IsWindowVisible(_hwnd))
{
throw new InvalidOperationException(SR.Get(SRID.OperationCannotBePerformed));
}
//
// Get the bounding rect for the window.
//
NativeMethods.Win32Rect BoundingRect = NativeMethods.Win32Rect.Empty;
if (!Misc.GetWindowRect(_hwnd, ref BoundingRect))
{
return;
}
//
// All we really need here are the height and the width,
// so we don't even need to translate between screen
// and client coordinates.
//
int width = BoundingRect.right - BoundingRect.left;
int height = BoundingRect.bottom - BoundingRect.top;
//
// Determine the point to click.
//
// @
for (int Resolution = 10; Resolution > 0; --Resolution)
{
for (int x = 1; x <= width; x += Resolution)
{
for (int y = 1; y <= height; y += Resolution)
{
//
// Send the link an LM_HITTEST message.
//
// Allocate a local hit test info struct.
UnsafeNativeMethods.LHITTESTINFO HitTestInfo = new UnsafeNativeMethods.LHITTESTINFO();
// Fill in the coordinates that we want to check.
HitTestInfo.pt.x = x;
HitTestInfo.pt.y = y;
// Fill in index and state info.
HitTestInfo.item.mask = NativeMethods.LIF_ITEMINDEX | NativeMethods.LIF_STATE;
HitTestInfo.item.iLink = 0;
HitTestInfo.item.stateMask = NativeMethods.LIS_ENABLED;
HitTestInfo.item.state = 0;
bool bGetItemResult;
unsafe
{
// Send the LM_HITTEST message.
bGetItemResult = XSendMessage.XSend(_hwnd, NativeMethods.LM_HITTEST, IntPtr.Zero, new IntPtr(&HitTestInfo), Marshal.SizeOf(HitTestInfo.GetType()));
}
if (bGetItemResult == true && HitTestInfo.item.iLink == _item)
{
//
// N.B. [SEdmison]:
// This multiplication is essentially just
// a left shift by one word's width; in
// Win32 I'd just use my trusty MAKELONG macro,
// but C# doesn't give me that option.
//
Misc.ProxySendMessage(_hwnd, NativeMethods.WM_LBUTTONDOWN, IntPtr.Zero, NativeMethods.Util.MAKELPARAM(x, y));
Misc.ProxySendMessage(_hwnd, NativeMethods.WM_LBUTTONUP, IntPtr.Zero, NativeMethods.Util.MAKELPARAM(x, y));
return;
}
}
}
}
}
// Same as clicking on an hyperlink
void IInvokeProvider.Invoke()
{
// Check that button can be clicked.
//
// This state could change anytime.
//
// Make sure that the control is enabled
if (!SafeNativeMethods.IsWindowEnabled(_hwnd))
{
throw new ElementNotEnabledException();
}
if (!SafeNativeMethods.IsWindowVisible(_hwnd))
{
throw new InvalidOperationException(SR.Get(SRID.OperationCannotBePerformed));
}
//
// Get the bounding rect for the window.
//
NativeMethods.Win32Rect BoundingRect = NativeMethods.Win32Rect.Empty;
if (!Misc.GetWindowRect(_hwnd, ref BoundingRect))
{
return;
}
//
// All we really need here are the height and the width,
// so we don't even need to translate between screen
// and client coordinates.
//
int width = BoundingRect.right - BoundingRect.left;
int height = BoundingRect.bottom - BoundingRect.top;
//
// Determine the point to click.
//
// We do this by scanning over the window's client
// region hit-testing until we find a point that
// corresponds to our link. We start out by scanning
// at a resolution of 10x10 pixels, starting from the
// window's (1,1) coordinate, then reducing the resolution
// if needed. Thus the idea here is to scan quickly if
// possible, but more thoroughly if absolutely necessary.
//
// Note:
// I intentionally started scanning points starting from
// (1,1) rather than from (0,0) just in case clicking the
// border of a control is different than clicking inside
// the border.
//
for (int Resolution = 10; Resolution > 0; --Resolution)
{
for (int x = 1; x <= width; x += Resolution)
{
for (int y = 1; y <= height; y += Resolution)
{
//
// Send the link an LM_HITTEST message.
//
// Allocate a local hit test info struct.
UnsafeNativeMethods.LHITTESTINFO HitTestInfo = new UnsafeNativeMethods.LHITTESTINFO();
// Fill in the coordinates that we want to check.
HitTestInfo.pt.x = x;
HitTestInfo.pt.y = y;
// Fill in index and state info.
HitTestInfo.item.mask = NativeMethods.LIF_ITEMINDEX | NativeMethods.LIF_STATE;
HitTestInfo.item.iLink = 0;
HitTestInfo.item.stateMask = NativeMethods.LIS_ENABLED;
HitTestInfo.item.state = 0;
bool bGetItemResult;
unsafe
{
// Send the LM_HITTEST message.
bGetItemResult = XSendMessage.XSend(_hwnd, NativeMethods.LM_HITTEST, IntPtr.Zero, new IntPtr(&HitTestInfo), Marshal.SizeOf(HitTestInfo.GetType()));
}
if (bGetItemResult == true && HitTestInfo.item.iLink == _item)
{
//
// N.B. [SEdmison]:
// This multiplication is essentially just
// a left shift by one word's width; in
// Win32 I'd just use my trusty MAKELONG macro,
// but C# doesn't give me that option.
//
Misc.ProxySendMessage(_hwnd, NativeMethods.WM_LBUTTONDOWN, IntPtr.Zero, NativeMethods.Util.MAKELPARAM(x, y));
Misc.ProxySendMessage(_hwnd, NativeMethods.WM_LBUTTONUP, IntPtr.Zero, NativeMethods.Util.MAKELPARAM(x, y));
return;
}
}
}
}
}
