/**************************************************************************
THIS CODE AND INFORMATION IS PROVIDED 'AS IS' WITHOUT WARRANTY OF
ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
PARTICULAR PURPOSE.
Author: Leon Finker 1/2001
**************************************************************************/
//controls.h
#ifndef __CONTROLS_H__
#define __CONTROLS_H__
#include "editdroptarget.h"
#include "listviewdroptarget.h"
#include "staticdroptarget.h"
#include "treedroptarget.h"
class CEditBox : public CWindowImpl<CEditBox, WTL::CEdit>, public WTL::CEditCommands<CEditBox>
{
CIDropTarget* m_pDropTarget;
public:
CEditBox():m_pDropTarget(NULL){}
BEGIN_MSG_MAP(CEditBox)
MESSAGE_HANDLER(WM_DESTROY, OnDestroy)
CHAIN_MSG_MAP_ALT(CEditCommands<CEditBox>, 1)
DEFAULT_REFLECTION_HANDLER()
END_MSG_MAP()
LRESULT OnDestroy(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
RevokeDragDrop(m_hWnd); //calls release
m_pDropTarget=NULL;
return 0;
}
bool InitDragDrop()
{
m_pDropTarget = new CEditDropTarget(m_hWnd);
if(m_pDropTarget == NULL)
return false;
m_pDropTarget->AddRef();
if(FAILED(RegisterDragDrop(m_hWnd,m_pDropTarget))) //calls addref
{
m_pDropTarget = NULL;
return false;
}
else
m_pDropTarget->Release(); //i decided to AddRef explicitly after new
FORMATETC ftetc={0};
ftetc.cfFormat = CF_TEXT;
ftetc.dwAspect = DVASPECT_CONTENT;
ftetc.lindex = -1;
ftetc.tymed = TYMED_ISTREAM;
m_pDropTarget->AddSuportedFormat(ftetc);
ftetc.tymed = TYMED_HGLOBAL;
m_pDropTarget->AddSuportedFormat(ftetc);
ftetc.cfFormat=CF_HDROP;
m_pDropTarget->AddSuportedFormat(ftetc);
return true;
}
};
class CTreeBox : public CWindowImpl<CTreeBox, WTL::CTreeViewCtrl>
{
CIDropTarget* m_pDropTarget;
public:
BEGIN_MSG_MAP(CTreeBox)
MESSAGE_HANDLER(WM_DESTROY, OnDestroy)
REFLECTED_NOTIFY_HANDLER(IDC_TREE1, TVN_BEGINDRAG, OnBegindrag)
DEFAULT_REFLECTION_HANDLER()
END_MSG_MAP()
CTreeBox():m_pDropTarget(NULL){}
LRESULT OnDestroy(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
RevokeDragDrop(m_hWnd); //calls release
m_pDropTarget=NULL;
return 0;
}
LRESULT OnBegindrag(int idCtrl, LPNMHDR pnmh, BOOL& bHandled)
{
NMTREEVIEW* pnmtv = (NMTREEVIEW*)pnmh;
USES_CONVERSION;
CComBSTR bstr;
GetItemText(pnmtv->itemNew.hItem, bstr.m_str);
CIDropSource* pdsrc = new CIDropSource;
if(pdsrc == NULL)
return 0;
pdsrc->AddRef();
CIDataObject* pdobj = new CIDataObject(pdsrc);
if(pdobj == NULL)
return 0;
pdobj->AddRef();
FORMATETC fmtetc = {0};
fmtetc.cfFormat = CF_TEXT;
fmtetc.dwAspect = DVASPECT_CONTENT;
fmtetc.lindex = -1;
fmtetc.tymed = TYMED_HGLOBAL;
STGMEDIUM medium = {0};
medium.tymed = TYMED_HGLOBAL;
TCHAR* str = OLE2T(bstr.m_str);
medium.hGlobal = GlobalAlloc(GMEM_MOVEABLE, strlen(str)+1); //for NULL
TCHAR* pMem = (TCHAR*)GlobalLock(medium.hGlobal);
strcpy(pMem,str);
GlobalUnlock(medium.hGlobal);
pdobj->SetData(&fmtetc,&medium,TRUE);
CDragSourceHelper dragSrcHelper;
// get drag image from the window through DI_GETDRAGIMAGE (treeview seems to already support it)
dragSrcHelper.InitializeFromWindow(m_hWnd, pnmtv->ptDrag, pdobj);
DWORD dwEffect;
HRESULT hr = ::DoDragDrop(pdobj, pdsrc, DROPEFFECT_COPY, &dwEffect);
pdsrc->Release();
pdobj->Release();
return 0;
}
bool InitDragDrop()
{
m_pDropTarget = new CTreeDropTarget(m_hWnd);
if(m_pDropTarget == NULL)
return false;
m_pDropTarget->AddRef();
if(FAILED(RegisterDragDrop(m_hWnd,m_pDropTarget))) //calls addref
{
m_pDropTarget = NULL;
return false;
}
else
m_pDropTarget->Release(); //i decided to AddRef explicitly after new
FORMATETC ftetc={0};
ftetc.cfFormat = CF_TEXT;
ftetc.dwAspect = DVASPECT_CONTENT;
ftetc.lindex = -1;
ftetc.tymed = TYMED_HGLOBAL;
m_pDropTarget->AddSuportedFormat(ftetc);
ftetc.cfFormat=CF_HDROP;
m_pDropTarget->AddSuportedFormat(ftetc);
return true;
}
};
class CStaticBox : public CWindowImpl<CStatic,WTL::CStatic>
{
CIDropTarget* m_pDropTarget;
bool m_bDragMode;
public:
BEGIN_MSG_MAP(CStaticBox)
MESSAGE_HANDLER(WM_LBUTTONDOWN, OnLButtonDown)
MESSAGE_HANDLER(WM_CONTEXTMENU, OnContextMenu)
MESSAGE_HANDLER(WM_MOUSEMOVE, OnMouseMove)
MESSAGE_HANDLER(WM_DESTROY, OnDestroy)
DEFAULT_REFLECTION_HANDLER()
END_MSG_MAP()
CStaticBox():m_bDragMode(false), m_pDropTarget(NULL){}
LRESULT OnDestroy(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
RevokeDragDrop(m_hWnd); //calls release
m_pDropTarget=NULL;
return 0;
}
LRESULT OnContextMenu(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
CMenu menu;
if(!menu.CreatePopupMenu())
return 0;
menu.AppendMenu(MF_STRING, 1, "Copy");
int nCmd = menu.TrackPopupMenu(TPM_RETURNCMD,LOWORD(lParam),HIWORD(lParam),m_hWnd);
if(nCmd == 1)
{
CIDataObject* pdobj = new CIDataObject(NULL);
if(pdobj == NULL)
return 0;
pdobj->AddRef();
BITMAP bmap;
HBITMAP hBitmap = (HBITMAP)OleDuplicateData(GetBitmap(), CF_BITMAP, NULL);
GetObject(hBitmap, sizeof(BITMAP), &bmap);
RECT rc={0,0,bmap.bmWidth,bmap.bmHeight};
HDC hdc = GetDC();
FORMATETC fmtetc = {0};
STGMEDIUM medium = {0};
fmtetc.dwAspect = DVASPECT_CONTENT;
fmtetc.lindex = -1;
fmtetc.cfFormat = CF_ENHMETAFILE;
fmtetc.tymed = TYMED_ENHMF;
HDC hMetaDC = CreateEnhMetaFile(hdc, NULL, NULL, NULL);
HDC hdcMem = CreateCompatibleDC(hdc);
HGDIOBJ hOldBmp = ::SelectObject(hdcMem, hBitmap);
::BitBlt(hMetaDC, 0, 0, rc.right, rc.bottom, hdcMem, 0, 0, SRCCOPY);
::SelectObject(hdcMem, hOldBmp);
medium.hEnhMetaFile = CloseEnhMetaFile(hMetaDC);
DeleteDC(hdcMem);
ReleaseDC(hdc);
medium.tymed = TYMED_ENHMF;
pdobj->SetData(&fmtetc,&medium,TRUE);
OleSetClipboard(pdobj);
OleFlushClipboard(); //render the data
pdobj->Release();
}
return 0;
}
LRESULT OnLButtonDown(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
m_bDragMode = true;
return 0;
}
LRESULT OnMouseMove(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
if(m_bDragMode && wParam == MK_LBUTTON)
{
CIDropSource* pdsrc = new CIDropSource;
if(pdsrc == NULL)
return 0;
pdsrc->AddRef();
CIDataObject* pdobj = new CIDataObject(pdsrc);
if(pdobj == NULL)
return 0;
pdobj->AddRef();
FORMATETC fmtetc = {0};
STGMEDIUM medium = {0};
fmtetc.dwAspect = DVASPECT_CONTENT;
fmtetc.lindex = -1;
//////////////////////////////////////
fmtetc.cfFormat = CF_BITMAP;
fmtetc.tymed = TYMED_GDI;
medium.tymed = TYMED_GDI;
HBITMAP hBitmap = (HBITMAP)OleDuplicateData(GetBitmap(), fmtetc.cfFormat, NULL);
medium.hBitmap = hBitmap;
pdobj->SetData(&fmtetc,&medium,FALSE);
//////////////////////////////////////
BITMAP bmap;
GetObject(hBitmap, sizeof(BITMAP), &bmap);
RECT rc={0,0,bmap.bmWidth,bmap.bmHeight};
HDC hdc = GetDC();
fmtetc.cfFormat = CF_ENHMETAFILE;
fmtetc.tymed = TYMED_ENHMF;
HDC hMetaDC = CreateEnhMetaFile(hdc, NULL, NULL, NULL);
HDC hdcMem = CreateCompatibleDC(hdc);
HGDIOBJ hOldBmp = ::SelectObject(hdcMem, hBitmap);
::BitBlt(hMetaDC, 0, 0, rc.right, rc.bottom, hdcMem, 0, 0, SRCCOPY);
::SelectObject(hdcMem, hOldBmp);
medium.hEnhMetaFile = CloseEnhMetaFile(hMetaDC);
DeleteDC(hdcMem);
ReleaseDC(hdc);
medium.tymed = TYMED_ENHMF;
pdobj->SetData(&fmtetc,&medium,TRUE);
//////////////////////////////////////
CDragSourceHelper dragSrcHelper;
POINT pt={LOWORD(lParam), HIWORD(lParam)};
//rc is off because i used static box with style where bmp doesn't take whole window
dragSrcHelper.InitializeFromBitmap(hBitmap, pt, rc, pdobj); //will own the bmp
DWORD dwEffect;
HRESULT hr = ::DoDragDrop(pdobj, pdsrc, DROPEFFECT_COPY|DROPEFFECT_MOVE, &dwEffect);
pdsrc->Release();
pdobj->Release();
m_bDragMode = false;
}
return 0;
}
bool InitDragDrop()
{
m_pDropTarget = new CStaticDropTarget(m_hWnd);
if(m_pDropTarget == NULL)
return false;
m_pDropTarget->AddRef();
if(FAILED(RegisterDragDrop(m_hWnd,m_pDropTarget))) //calls addref
{
m_pDropTarget = NULL;
return false;
}
else
m_pDropTarget->Release(); //i decided to AddRef explicitly after new
FORMATETC ftetc={0};
ftetc.cfFormat = CF_BITMAP;
ftetc.dwAspect = DVASPECT_CONTENT;
ftetc.lindex = -1;
ftetc.tymed = TYMED_GDI;
m_pDropTarget->AddSuportedFormat(ftetc);
ftetc.cfFormat = CF_DIB;
ftetc.tymed = TYMED_HGLOBAL;
m_pDropTarget->AddSuportedFormat(ftetc);
ftetc.cfFormat = CF_HDROP;
ftetc.tymed = TYMED_HGLOBAL;
m_pDropTarget->AddSuportedFormat(ftetc);
ftetc.cfFormat = CF_ENHMETAFILE;
ftetc.tymed = TYMED_ENHMF;
m_pDropTarget->AddSuportedFormat(ftetc);
return true;
}
};
class CListViewBox : public CWindowImpl<CListViewBox,WTL::CListViewCtrl>
{
CIDropTarget* m_pDropTarget;
public:
BEGIN_MSG_MAP(CTreeBox)
MESSAGE_HANDLER(WM_DESTROY, OnDestroy)
REFLECTED_NOTIFY_HANDLER(IDC_LISTVIEW, LVN_BEGINDRAG, OnBegindragListview)
DEFAULT_REFLECTION_HANDLER()
END_MSG_MAP()
CListViewBox():m_pDropTarget(NULL){}
bool InitDragDrop()
{
m_pDropTarget = new CListViewDropTarget(m_hWnd);
if(m_pDropTarget == NULL)
return false;
m_pDropTarget->AddRef();
if(FAILED(RegisterDragDrop(m_hWnd,m_pDropTarget))) //calls addref
{
m_pDropTarget = NULL;
return false;
}
else
m_pDropTarget->Release(); //i decided to AddRef explicitly after new
FORMATETC ftetc={0};
ftetc.cfFormat = CF_TEXT;
ftetc.dwAspect = DVASPECT_CONTENT;
ftetc.lindex = -1;
ftetc.tymed = TYMED_HGLOBAL;
m_pDropTarget->AddSuportedFormat(ftetc);
ftetc.cfFormat=CF_HDROP;
m_pDropTarget->AddSuportedFormat(ftetc);
return true;
}
LRESULT OnBegindragListview(int idCtrl, LPNMHDR pnmh, BOOL& bHandled)
{
USES_CONVERSION;
NMLISTVIEW* pnmlv = (NMLISTVIEW*)pnmh;
CComBSTR bstr;
GetItemText(pnmlv->iItem, 0, bstr.m_str);
CIDropSource* pdsrc = new CIDropSource;
if(pdsrc == NULL)
return 0;
pdsrc->AddRef();
CIDataObject* pdobj = new CIDataObject(pdsrc);
if(pdobj == NULL)
return 0;
pdobj->AddRef();
FORMATETC fmtetc = {0};
fmtetc.cfFormat = CF_TEXT;
fmtetc.dwAspect = DVASPECT_CONTENT;
fmtetc.lindex = -1;
fmtetc.tymed = TYMED_HGLOBAL;
STGMEDIUM medium = {0};
medium.tymed = TYMED_HGLOBAL;
TCHAR* str = OLE2T(bstr.m_str);
medium.hGlobal = GlobalAlloc(GMEM_MOVEABLE, strlen(str)+1); //for NULL
TCHAR* pMem = (TCHAR*)GlobalLock(medium.hGlobal);
strcpy(pMem,str);
GlobalUnlock(medium.hGlobal);
pdobj->SetData(&fmtetc,&medium,TRUE);
/////////////////////////////////////////
HRESULT hr;
IStream* pStream;
/*IStream* pStream;
//ie5.0 API
hr = SHCreateStreamOn("readme.txt",STGM_READ,&pStream);
medium.pstm = pStream;
fmtetc.tymed = TYMED_ISTREAM;
medium.tymed = TYMED_ISTREAM;
pdobj->SetData(&fmtetc,&medium,TRUE);*/
/////////////////////////////////////////
CreateStreamOnHGlobal(NULL, TRUE, &pStream);
DWORD dwWritten;
pStream->Write(str, strlen(str)+1, &dwWritten);
LARGE_INTEGER dlibMove; dlibMove.QuadPart = 0;
pStream->Seek(dlibMove,STREAM_SEEK_SET,NULL);
medium.pstm = pStream;
fmtetc.tymed = TYMED_ISTREAM;
medium.tymed = TYMED_ISTREAM;
pdobj->SetData(&fmtetc,&medium,TRUE);
/////////////////////////////////////////
CDragSourceHelper dragSrcHelper;
if(1) // get drag image from the window through DI_GETDRAGIMAGE (listview seems to already support it)
dragSrcHelper.InitializeFromWindow(m_hWnd, pnmlv->ptAction, pdobj);
else // load drag image from bitmap
{
RECT rc;
ListView_GetItemRect(m_hWnd, pnmlv->iItem, &rc, LVIR_SELECTBOUNDS);
HBITMAP hBitmap = LoadBitmap(_Module.GetModuleInstance(), MAKEINTRESOURCE(IDB_DRAGIMG));
dragSrcHelper.InitializeFromBitmap(hBitmap, pnmlv->ptAction, rc, pdobj);
}
DWORD dwEffect;
hr = ::DoDragDrop(pdobj, pdsrc, DROPEFFECT_COPY, &dwEffect);
pdsrc->Release();
pdobj->Release();
//ReleaseStgMedium(&medium); // SetData fRelease flag is set, so DataObject owns the data don't free the data
return 0;
}
LRESULT OnDestroy(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
RevokeDragDrop(m_hWnd); //calls release
m_pDropTarget=NULL;
return 0;
}
};
#endif //__CONTROLS_H__
Submit an article or tip