inline HRESULT __stdcall ISimpleDropTarget::DragEnter(IDataObject * pDataObject, DWORD grfKeyState, POINTL ptl, DWORD * pdwEffect)
{
POINT pt;
pt.x = ptl.x;
pt.y = ptl.y;
if (m_pdth && PrevFancyRenderer) {
m_pdth->DragEnter(m_hwnd, pDataObject, &pt, *pdwEffect);
}
m_DataObject = pDataObject;
dragInAction = true;
m_RightData = QueryDataObject(pDataObject);
bool canDrop = m_RightData && AllowDrop(ptl);
if (canDrop)
{
SetFocus(m_hwnd);
auto files = GetFiles(pDataObject);
*pdwEffect = OnDragEnter(files, grfKeyState, ptl);
}
else
{
*pdwEffect = DROPEFFECT_NONE;
}
return S_OK;
}
HRESULT DropTarget::DragEnter(IDataObject* data_object,
DWORD key_state,
POINTL cursor_position,
DWORD* effect) {
// Tell the helper that we entered so it can update the drag image.
IDropTargetHelper* drop_helper = DropHelper();
if (drop_helper) {
drop_helper->DragEnter(GetHWND(), data_object,
reinterpret_cast<POINT*>(&cursor_position), *effect);
}
// You can't drag and drop within the same HWND.
if (suspended_) {
*effect = DROPEFFECT_NONE;
return S_OK;
}
current_data_object_ = data_object;
POINT screen_pt = { cursor_position.x, cursor_position.y };
*effect = OnDragEnter(current_data_object_, key_state, screen_pt, *effect);
return S_OK;
}
DROPEFFECT CBCGPPlannerDropTarget::OnDragScroll(CWnd* pWnd, DWORD dwKeyState, CPoint point)
{
if (m_pPlanner == NULL)
{
return DROPEFFECT_NONE;
}
ASSERT_VALID (m_pPlanner);
DROPEFFECT dropEffect = m_pPlanner->OnDragScroll(dwKeyState, point);
// DROPEFFECT_SCROLL means do the default
if (dropEffect != DROPEFFECT_SCROLL)
return dropEffect;
// get client rectangle of destination window
CRect rectClient;
m_pPlanner->GetDragScrollRect(rectClient);
CRect rect = rectClient;
// hit-test against inset region
UINT nTimerID = MAKEWORD(-1, -1);
rect.InflateRect(-nScrollInset, -nScrollInset);
if (rectClient.PtInRect(point) && !rect.PtInRect(point))
{
// determine which way to scroll along both X & Y axis
if (point.x < rect.left)
{
nTimerID = MAKEWORD(SB_LINEUP, HIBYTE(nTimerID));
}
else if (point.x >= rect.right)
{
nTimerID = MAKEWORD(SB_LINEDOWN, HIBYTE(nTimerID));
}
if (point.y < rect.top)
{
nTimerID = MAKEWORD(LOBYTE(nTimerID), SB_LINEUP);
}
else if (point.y >= rect.bottom)
{
nTimerID = MAKEWORD(LOBYTE(nTimerID), SB_LINEDOWN);
}
ASSERT(nTimerID != MAKEWORD(-1, -1));
BOOL bEnableScroll = m_pPlanner->OnScroll(nTimerID, 0, FALSE);
if (!bEnableScroll)
{
nTimerID = MAKEWORD(-1, -1);
}
}
if (m_nTimerID == MAKEWORD(-1, -1) && nTimerID != MAKEWORD(-1, -1))
{
// send fake OnDragEnter when transition from scroll->normal
COleDataObject dataObject;
dataObject.Attach(m_lpDataObject, FALSE);
OnDragEnter(pWnd, &dataObject, dwKeyState, point);
}
if (nTimerID == MAKEWORD(-1, -1))
{
if (m_nTimerID != MAKEWORD(-1, -1))
{
// send fake OnDragEnter when transition from scroll->normal
//COleDataObject dataObject;
//dataObject.Attach(m_lpDataObject, FALSE);
//OnDragEnter(pWnd, &dataObject, dwKeyState, point);
m_nTimerID = MAKEWORD(-1, -1);
}
return DROPEFFECT_NONE;
}
// save tick count when timer ID changes
DWORD dwTick = GetTickCount();
if (nTimerID != m_nTimerID)
{
m_dwLastTick = dwTick;
m_nScrollDelay = nScrollDelay;
}
// scroll if necessary
if (dwTick - m_dwLastTick > m_nScrollDelay)
{
m_pPlanner->OnScroll(nTimerID, 0, TRUE);
m_dwLastTick = dwTick;
m_nScrollDelay = nScrollInterval;
}
if (m_nTimerID == MAKEWORD(-1, -1))
{
// send fake OnDragLeave when transitioning from normal->scroll
//OnDragLeave(pWnd);
}
m_nTimerID = nTimerID;
/*
// check for force link
if ((dwKeyState & (MK_CONTROL | MK_SHIFT)) == (MK_CONTROL | MK_SHIFT))
dropEffect = DROPEFFECT_SCROLL|DROPEFFECT_LINK;
// check for force copy
else */if ((dwKeyState & MK_CONTROL) == MK_CONTROL)
dropEffect = DROPEFFECT_SCROLL | DROPEFFECT_COPY;
// check for force move
else if ((dwKeyState & MK_ALT) == MK_ALT ||
(dwKeyState & MK_SHIFT) == MK_SHIFT)
dropEffect = DROPEFFECT_SCROLL | DROPEFFECT_MOVE;
// default -- recommended action is move
else
dropEffect = DROPEFFECT_SCROLL | DROPEFFECT_MOVE;
return dropEffect;
}
void UUserWidget::NativeOnDragEnter( const FGeometry& InGeometry, const FDragDropEvent& InDragDropEvent, UDragDropOperation* InOperation )
{
OnDragEnter( InGeometry, InDragDropEvent, InOperation );
}
DROPEFFECT COleDropTarget::OnDragScroll(CWnd* pWnd, DWORD dwKeyState,
CPoint point)
{
ASSERT_VALID(this);
ASSERT_VALID(pWnd);
// CWnds are allowed, but don't support autoscrolling
if (!pWnd->IsKindOf(RUNTIME_CLASS(CView)))
return DROPEFFECT_NONE;
CView* pView = (CView*)pWnd;
DROPEFFECT dropEffect = pView->OnDragScroll(dwKeyState, point);
// DROPEFFECT_SCROLL means do the default
if (dropEffect != DROPEFFECT_SCROLL)
return dropEffect;
// get client rectangle of destination window
CRect rectClient;
pWnd->GetClientRect(&rectClient);
CRect rect = rectClient;
// hit-test against inset region
UINT nTimerID = 0xffff;
rect.InflateRect(-nScrollInset, -nScrollInset);
CSplitterWnd* pSplitter = NULL;
if (rectClient.PtInRect(point) && !rect.PtInRect(point))
{
// determine which way to scroll along both X & Y axis
if (point.x < rect.left)
nTimerID = MAKEWORD(SB_LINEUP, HIBYTE(nTimerID));
else if (point.x >= rect.right)
nTimerID = MAKEWORD(SB_LINEDOWN, HIBYTE(nTimerID));
if (point.y < rect.top)
nTimerID = MAKEWORD(LOBYTE(nTimerID), SB_LINEUP);
else if (point.y >= rect.bottom)
nTimerID = MAKEWORD(LOBYTE(nTimerID), SB_LINEDOWN);
ASSERT(nTimerID != 0xffff);
// check for valid scroll first
pSplitter = CView::GetParentSplitter(pView, FALSE);
BOOL bEnableScroll = FALSE;
if (pSplitter != NULL)
bEnableScroll = pSplitter->DoScroll(pView, nTimerID, FALSE);
else
bEnableScroll = pView->OnScroll(nTimerID, 0, FALSE);
if (!bEnableScroll)
nTimerID = 0xffff;
}
if (nTimerID == 0xffff)
{
if (m_nTimerID != 0xffff)
{
// send fake OnDragEnter when transition from scroll->normal
COleDataObject dataObject;
dataObject.Attach(m_lpDataObject, FALSE);
OnDragEnter(pWnd, &dataObject, dwKeyState, point);
m_nTimerID = 0xffff;
}
return DROPEFFECT_NONE;
}
// save tick count when timer ID changes
DWORD dwTick = GetTickCount();
if (nTimerID != m_nTimerID)
{
m_dwLastTick = dwTick;
m_nScrollDelay = nScrollDelay;
}
// scroll if necessary
if (dwTick - m_dwLastTick > m_nScrollDelay)
{
if (pSplitter != NULL)
pSplitter->DoScroll(pView, nTimerID, TRUE);
else
pView->OnScroll(nTimerID, 0, TRUE);
m_dwLastTick = dwTick;
m_nScrollDelay = nScrollInterval;
}
if (m_nTimerID == 0xffff)
{
// send fake OnDragLeave when transitioning from normal->scroll
OnDragLeave(pWnd);
}
m_nTimerID = nTimerID;
// check for force link
if ((dwKeyState & (MK_CONTROL|MK_SHIFT)) == (MK_CONTROL|MK_SHIFT))
dropEffect = DROPEFFECT_SCROLL|DROPEFFECT_LINK;
// check for force copy
else if ((dwKeyState & MK_CONTROL) == MK_CONTROL)
dropEffect = DROPEFFECT_SCROLL|DROPEFFECT_COPY;
// check for force move
else if ((dwKeyState & MK_ALT) == MK_ALT ||
(dwKeyState & MK_SHIFT) == MK_SHIFT)
dropEffect = DROPEFFECT_SCROLL|DROPEFFECT_MOVE;
// default -- recommended action is move
else
dropEffect = DROPEFFECT_SCROLL|DROPEFFECT_MOVE;
return dropEffect;
}
// Update this later. For now, bail out (via the base class)
DROPEFFECT SECEditCtrlOleDropTarget::OnDragScroll(CWnd* pWnd, DWORD dwKeyState,
CPoint point)
{
//return COleDropTarget::OnDragScroll(pWnd, dwKeyState, point);
ASSERT_VALID(this);
ASSERT_VALID(pWnd);
if (!pWnd->IsKindOf(RUNTIME_CLASS(SECEditCtrl)))
return DROPEFFECT_NONE;
SECEditCtrl* pSECEditCtrl = (SECEditCtrl*)pWnd;
DROPEFFECT dropEffect = 0;
// get client rectangle of destination window
CRect rectClient;
pWnd->GetClientRect(&rectClient);
CRect rect = rectClient;
// hit-test against inset region
UINT nTimerID = MAKEWORD(-1, -1);
rect.InflateRect(-nScrollInset, -nScrollInset);
if (rectClient.PtInRect(point) && !rect.PtInRect(point))
{
// determine which way to scroll along both X & Y axis
if (point.x < rect.left)
nTimerID = MAKEWORD(SB_LINEUP, HIBYTE(nTimerID));
else if (point.x >= rect.right)
nTimerID = MAKEWORD(SB_LINEDOWN, HIBYTE(nTimerID));
if (point.y < rect.top)
nTimerID = MAKEWORD(LOBYTE(nTimerID), SB_LINEUP);
else if (point.y >= rect.bottom)
nTimerID = MAKEWORD(LOBYTE(nTimerID), SB_LINEDOWN);
ASSERT(nTimerID != MAKEWORD(-1, -1));
BOOL bEnableScroll = FALSE;
bEnableScroll = pSECEditCtrl->OnScroll(nTimerID, 0, FALSE);
if (!bEnableScroll)
nTimerID = MAKEWORD(-1, -1);
}
if (nTimerID == MAKEWORD(-1, -1))
{
if (m_nTimerID != MAKEWORD(-1, -1))
{
// send fake OnDragEnter when transition from scroll->normal
COleDataObject dataObject;
dataObject.Attach(m_lpDataObject, FALSE);
OnDragEnter(pWnd, &dataObject, dwKeyState, point);
m_nTimerID = MAKEWORD(-1, -1);
}
return DROPEFFECT_NONE;
}
// save tick count when timer ID changes
DWORD dwTick = GetTickCount();
if (nTimerID != m_nTimerID)
{
m_dwLastTick = dwTick;
m_nScrollDelay = nScrollDelay;
}
// scroll if necessary
if (dwTick - m_dwLastTick > m_nScrollDelay)
{
pSECEditCtrl->OnScroll(nTimerID, 0, TRUE);
m_dwLastTick = dwTick;
m_nScrollDelay = nScrollInterval;
}
if (m_nTimerID == MAKEWORD(-1, -1))
{
// send fake OnDragLeave when transitioning from normal->scroll
OnDragLeave(pWnd);
}
m_nTimerID = nTimerID;
// check for force link
if ((dwKeyState & (MK_CONTROL|MK_SHIFT)) == (MK_CONTROL|MK_SHIFT))
dropEffect = DROPEFFECT_SCROLL|DROPEFFECT_LINK;
// check for force copy
else if ((dwKeyState & MK_CONTROL) == MK_CONTROL)
dropEffect = DROPEFFECT_SCROLL|DROPEFFECT_COPY;
// check for force move
else if ((dwKeyState & MK_ALT) == MK_ALT ||
(dwKeyState & MK_SHIFT) == MK_SHIFT)
dropEffect = DROPEFFECT_SCROLL|DROPEFFECT_MOVE;
// default -- recommended action is move
else
dropEffect = DROPEFFECT_SCROLL|DROPEFFECT_MOVE;
return dropEffect;
}
