///////////////////////////////////////////////////////////////////////////////
-// Name: ole/droptgt.cpp
+// Name: src/msw/ole/droptgt.cpp
// Purpose: wxDropTarget implementation
// Author: Vadim Zeitlin
// Modified by:
// headers
// ----------------------------------------------------------------------------
-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
-#pragma implementation "droptgt.h"
-#endif
-
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#if defined(__BORLANDC__)
-#pragma hdrstop
+ #pragma hdrstop
#endif
-#include "wx/setup.h"
-
#if wxUSE_OLE && wxUSE_DRAG_AND_DROP
+#ifndef WX_PRECOMP
+ #include "wx/msw/wrapwin.h"
+ #include "wx/log.h"
+#endif
+
#include "wx/msw/private.h"
-#include "wx/log.h"
#ifdef __WXWINCE__
#include <winreg.h>
#ifdef __WIN32__
#if !defined(__GNUWIN32__) || wxUSE_NORLANDER_HEADERS
- #if wxCHECK_W32API_VERSION( 1, 0 )
- #include "wx/msw/wrapwin.h"
- #endif
#include <shlobj.h> // for DROPFILES structure
#endif
#else
HWND m_hwnd; // window we're associated with
// get default drop effect for given keyboard flags
- static inline DWORD GetDropEffect(DWORD flags);
+ static DWORD GetDropEffect(DWORD flags, wxDragResult defaultAction, DWORD pdwEffect);
DECLARE_NO_COPY_CLASS(wxIDropTarget)
};
// Name : static wxIDropTarget::GetDropEffect
// Purpose : determine the drop operation from keyboard/mouse state.
// Returns : DWORD combined from DROPEFFECT_xxx constants
-// Params : [in] DWORD flags kbd & mouse flags as passed to
-// IDropTarget methods
+// Params : [in] DWORD flags kbd & mouse flags as passed to
+// IDropTarget methods
+// [in] wxDragResult defaultAction the default action of the drop target
+// [in] DWORD pdwEffect the supported actions of the drop
+// source passed to IDropTarget methods
// Notes : We do "move" normally and "copy" if <Ctrl> is pressed,
// which is the standard behaviour (currently there is no
// way to redefine it)
-DWORD wxIDropTarget::GetDropEffect(DWORD flags)
+DWORD wxIDropTarget::GetDropEffect(DWORD flags,
+ wxDragResult defaultAction,
+ DWORD pdwEffect)
{
- return flags & MK_CONTROL ? DROPEFFECT_COPY : DROPEFFECT_MOVE;
+ DWORD effectiveAction;
+ if ( defaultAction == wxDragCopy )
+ effectiveAction = flags & MK_SHIFT ? DROPEFFECT_MOVE : DROPEFFECT_COPY;
+ else
+ effectiveAction = flags & MK_CONTROL ? DROPEFFECT_COPY : DROPEFFECT_MOVE;
+
+ if ( !(effectiveAction & pdwEffect) )
+ {
+ // the action is not supported by drag source, fall back to something
+ // that it does support
+ if ( pdwEffect & DROPEFFECT_MOVE )
+ effectiveAction = DROPEFFECT_MOVE;
+ else if ( pdwEffect & DROPEFFECT_COPY )
+ effectiveAction = DROPEFFECT_COPY;
+ else if ( pdwEffect & DROPEFFECT_LINK )
+ effectiveAction = DROPEFFECT_LINK;
+ else
+ effectiveAction = DROPEFFECT_NONE;
+ }
+
+ return effectiveAction;
}
wxIDropTarget::wxIDropTarget(wxDropTarget *pTarget)
// Name : wxIDropTarget::DragEnter
// Purpose : Called when the mouse enters the window (dragging something)
// Returns : S_OK
-// Params : [in] IDataObject *pIDataSource : source data
-// [in] DWORD grfKeyState : kbd & mouse state
-// [in] POINTL pt : mouse coordinates
-// [out]DWORD *pdwEffect : effect flag
+// Params : [in] IDataObject *pIDataSource : source data
+// [in] DWORD grfKeyState : kbd & mouse state
+// [in] POINTL pt : mouse coordinates
+// [in/out]DWORD *pdwEffect : effect flag
+// In: Supported effects
+// Out: Resulting effect
// Notes :
STDMETHODIMP wxIDropTarget::DragEnter(IDataObject *pIDataSource,
DWORD grfKeyState,
// give some visual feedback
*pdwEffect = ConvertDragResultToEffect(
- m_pTarget->OnEnter(pt.x, pt.y,
- ConvertDragEffectToResult(GetDropEffect(grfKeyState))
+ m_pTarget->OnEnter(pt.x, pt.y, ConvertDragEffectToResult(
+ GetDropEffect(grfKeyState, m_pTarget->GetDefaultAction(), *pdwEffect))
)
);
// Purpose : Indicates that the mouse was moved inside the window represented
// by this drop target.
// Returns : S_OK
-// Params : [in] DWORD grfKeyState kbd & mouse state
-// [in] POINTL pt mouse coordinates
-// [out]LPDWORD pdwEffect effect flag
+// Params : [in] DWORD grfKeyState kbd & mouse state
+// [in] POINTL pt mouse coordinates
+// [in/out]LPDWORD pdwEffect current effect flag
// Notes : We're called on every WM_MOUSEMOVE, so this function should be
// very efficient.
STDMETHODIMP wxIDropTarget::DragOver(DWORD grfKeyState,
wxDragResult result;
if ( m_pIDataObject ) {
- result = ConvertDragEffectToResult(GetDropEffect(grfKeyState));
+ result = ConvertDragEffectToResult(
+ GetDropEffect(grfKeyState, m_pTarget->GetDefaultAction(), *pdwEffect));
}
else {
// can't accept data anyhow normally
result = wxDragNone;
}
- // we need client coordinates to pass to wxWin functions
- if ( !ScreenToClient(m_hwnd, (POINT *)&pt) )
- {
- wxLogLastError(wxT("ScreenToClient"));
- }
+ if ( result != wxDragNone ) {
+ // we need client coordinates to pass to wxWin functions
+ if ( !ScreenToClient(m_hwnd, (POINT *)&pt) )
+ {
+ wxLogLastError(wxT("ScreenToClient"));
+ }
- *pdwEffect = ConvertDragResultToEffect(
- m_pTarget->OnDragOver(pt.x, pt.y, result)
- );
+ *pdwEffect = ConvertDragResultToEffect(
+ m_pTarget->OnDragOver(pt.x, pt.y, result)
+ );
+ }
+ else {
+ *pdwEffect = DROPEFFECT_NONE;
+ }
return S_OK;
}
// Purpose : Instructs the drop target to paste data that was just now
// dropped on it.
// Returns : S_OK
-// Params : [in] IDataObject *pIDataSource the data to paste
-// [in] DWORD grfKeyState kbd & mouse state
-// [in] POINTL pt where the drop occured?
-// [ouy]DWORD *pdwEffect operation effect
+// Params : [in] IDataObject *pIDataSource the data to paste
+// [in] DWORD grfKeyState kbd & mouse state
+// [in] POINTL pt where the drop occurred?
+// [in/out]DWORD *pdwEffect operation effect
// Notes :
STDMETHODIMP wxIDropTarget::Drop(IDataObject *pIDataSource,
DWORD grfKeyState,
// that it's the same we've already got in DragEnter
wxASSERT( m_pIDataObject == pIDataSource );
- // by default, nothing happens
- *pdwEffect = DROPEFFECT_NONE;
-
// we need client coordinates to pass to wxWin functions
if ( !ScreenToClient(m_hwnd, (POINT *)&pt) )
{
m_pTarget->SetDataSource(pIDataSource);
// and now it has the data
- wxDragResult rc = ConvertDragEffectToResult(GetDropEffect(grfKeyState));
+ wxDragResult rc = ConvertDragEffectToResult(
+ GetDropEffect(grfKeyState, m_pTarget->GetDefaultAction(), *pdwEffect));
rc = m_pTarget->OnData(pt.x, pt.y, rc);
if ( wxIsDragResultOk(rc) ) {
// operation succeeded
*pdwEffect = ConvertDragResultToEffect(rc);
}
- //else: *pdwEffect is already DROPEFFECT_NONE
+ else {
+ *pdwEffect = DROPEFFECT_NONE;
+ }
+ }
+ else {
+ // OnDrop() returned false, no need to copy data
+ *pdwEffect = DROPEFFECT_NONE;
}
- //else: OnDrop() returned FALSE, no need to copy data
// release the held object
RELEASE_AND_NULL(m_pIDataObject);
// Or maybe we can dynamically load them from ceshell.dll
// or similar.
#if defined(__WXWINCE__) && _WIN32_WCE >= 400
- return FALSE;
+ wxUnusedVar(hwnd);
+ return false;
#else
HRESULT hr;
hr = ::CoLockObjectExternal(m_pIDropTarget, TRUE, FALSE);
if ( FAILED(hr) ) {
wxLogApiError(wxT("CoLockObjectExternal"), hr);
- return FALSE;
+ return false;
}
#endif
::CoLockObjectExternal(m_pIDropTarget, FALSE, FALSE);
#endif
wxLogApiError(wxT("RegisterDragDrop"), hr);
- return FALSE;
+ return false;
}
// we will need the window handle for coords transformation later
m_pIDropTarget->SetHwnd((HWND)hwnd);
- return TRUE;
+ return true;
#endif
}
{
#if defined(__WXWINCE__) && _WIN32_WCE >= 400
// Not available, see note above
+ wxUnusedVar(hwnd);
#else
HRESULT hr = ::RevokeDragDrop((HWND) hwnd);
// base class pure virtuals
// ----------------------------------------------------------------------------
-// OnDrop() is called only if we previously returned TRUE from
+// OnDrop() is called only if we previously returned true from
// IsAcceptedData(), so no need to check anything here
bool wxDropTarget::OnDrop(wxCoord WXUNUSED(x), wxCoord WXUNUSED(y))
{
- return TRUE;
+ return true;
}
// copy the data from the data source to the target data object
// this is strange because IsAcceptedData() succeeded previously!
wxFAIL_MSG(wxT("strange - did supported formats list change?"));
- return FALSE;
+ return false;
}
STGMEDIUM stm;
fmtMemory.lindex = -1;
fmtMemory.tymed = TYMED_HGLOBAL; // TODO to add other media
- bool rc = FALSE;
+ bool rc = false;
HRESULT hr = m_pIDataSource->GetData(&fmtMemory, &stm);
if ( SUCCEEDED(hr) ) {
hr = dataObject->SetData(&fmtMemory, &stm, TRUE);
if ( SUCCEEDED(hr) ) {
- rc = TRUE;
+ rc = true;
}
else {
wxLogApiError(wxT("IDataObject::SetData()"), hr);
}
}
-#endif
- // wxUSE_DRAG_AND_DROP
+#endif // wxUSE_OLE && wxUSE_DRAG_AND_DROP
projects / wxWidgets.git / blobdiff