void EyeXGaze::HandleQuery(TX_CONSTHANDLE hAsyncData)
{
std::lock_guard<std::mutex> lock(_mutex);
TX_HANDLE hQuery(TX_EMPTY_HANDLE); // query를 받기위한 핸들
txGetAsyncDataContent(hAsyncData, &hQuery); // asyncdatacontent를 hquery에 저장
const int bufferSize = 20;
TX_CHAR stringBuffer[bufferSize];
// query 를 가지고 rectangular bounds 생성
TX_HANDLE hBounds(TX_EMPTY_HANDLE);
txGetQueryBounds(hQuery, &hBounds); // query의 bound 알아낸다
TX_REAL pX, pY, pWidth, pHeight;
txGetRectangularBoundsData(hBounds, &pX, &pY, &pWidth, &pHeight);// bound에서 rectangular한 좌표 추출
txReleaseObject(&hBounds);
Gdiplus::Rect queryBounds((INT)pX, (INT)pY, (INT)pWidth, (INT)pHeight);
// query 를 가지고 Snapshot 생성
TX_HANDLE hSnapshot(TX_EMPTY_HANDLE);
txCreateSnapshotForQuery(hQuery, &hSnapshot);
TX_CHAR windowIdString[bufferSize];
sprintf_s(windowIdString, bufferSize, WINDOW_HANDLE_FORMAT, _hWnd);
if (QueryIsForWindowId(hQuery, windowIdString))
{
TX_ACTIVATABLEPARAMS params = { TX_FALSE };
for (auto region : _regions)
{
Gdiplus::Rect regionBounds((INT)region.bounds.left,(INT)region.bounds.top,
(INT)(region.bounds.right - region.bounds.left),
(INT)(region.bounds.bottom - region.bounds.top));
if (queryBounds.IntersectsWith(regionBounds))
{
TX_HANDLE hInteractor(TX_EMPTY_HANDLE);
sprintf_s(stringBuffer, bufferSize, "%d", region.id);
TX_RECT bounds;
bounds.X = region.bounds.left;
bounds.Y = region.bounds.top;
bounds.Width = region.bounds.right - region.bounds.left;
bounds.Height = region.bounds.bottom - region.bounds.top;
txCreateRectangularInteractor(hSnapshot, &hInteractor, stringBuffer, &bounds,
TX_LITERAL_ROOTID, windowIdString);
txCreateActivatableBehavior(hInteractor, ¶ms);
txReleaseObject(&hInteractor);
}
}
}
txCommitSnapshotAsync(hSnapshot, OnSnapshotCommitted, nullptr);
txReleaseObject(&hSnapshot);
txReleaseObject(&hQuery);
}
void EyeXHost::HandleQuery(TX_CONSTHANDLE hAsyncData)
{
std::lock_guard<std::mutex> lock(_mutex);
// NOTE. This method will fail silently if, for example, the connection is lost before the snapshot has been committed,
// or if we run out of memory. This is by design, because there is nothing we can do to recover from these errors anyway.
TX_HANDLE hQuery(TX_EMPTY_HANDLE);
txGetAsyncDataContent(hAsyncData, &hQuery);
const int bufferSize = 20;
TX_CHAR stringBuffer[bufferSize];
// read the query bounds from the query, that is, the area on the screen that the query concerns.
// the query region is always rectangular.
TX_HANDLE hBounds(TX_EMPTY_HANDLE);
txGetQueryBounds(hQuery, &hBounds);
TX_REAL pX, pY, pWidth, pHeight;
txGetRectangularBoundsData(hBounds, &pX, &pY, &pWidth, &pHeight);
txReleaseObject(&hBounds);
Gdiplus::Rect queryBounds((INT)pX, (INT)pY, (INT)pWidth, (INT)pHeight);
// create a new snapshot with the same window id and bounds as the query.
TX_HANDLE hSnapshot(TX_EMPTY_HANDLE);
txCreateSnapshotForQuery(hQuery, &hSnapshot);
TX_CHAR windowIdString[bufferSize];
sprintf_s(windowIdString, bufferSize, WINDOW_HANDLE_FORMAT, _hWnd);
if (QueryIsForWindowId(hQuery, windowIdString))
{
// define options for our activatable regions: no, we don't want tentative focus events.
TX_ACTIVATABLEPARAMS params = { TX_FALSE };
// iterate through all regions and create interactors for those that overlap with the query bounds.
for (auto region : _regions)
{
Gdiplus::Rect regionBounds((INT)region.bounds.left, (INT)region.bounds.top,
(INT)(region.bounds.right - region.bounds.left), (INT)(region.bounds.bottom - region.bounds.top));
if (queryBounds.IntersectsWith(regionBounds))
{
TX_HANDLE hInteractor(TX_EMPTY_HANDLE);
sprintf_s(stringBuffer, bufferSize, "%d", region.id);
TX_RECT bounds;
bounds.X = region.bounds.left;
bounds.Y = region.bounds.top;
bounds.Width = region.bounds.right - region.bounds.left;
bounds.Height = region.bounds.bottom - region.bounds.top;
txCreateRectangularInteractor(hSnapshot, &hInteractor, stringBuffer, &bounds, TX_LITERAL_ROOTID, windowIdString);
txCreateActivatableBehavior(hInteractor, ¶ms);
txReleaseObject(&hInteractor);
}
}
}
txCommitSnapshotAsync(hSnapshot, OnSnapshotCommitted, nullptr);
txReleaseObject(&hSnapshot);
txReleaseObject(&hQuery);
}