src/msw/dragimag.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        src/msw/dragimag.cpp
// Purpose:     wxDragImage
// Author:      Julian Smart
// Modified by:
// Created:     08/04/99
// RCS-ID:      $Id$
// Copyright:   (c) Julian Smart
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

// ============================================================================
// declarations
// ============================================================================

// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------

// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

#if wxUSE_DRAGIMAGE

#ifndef WX_PRECOMP
    #include <stdio.h>
    #include "wx/window.h"
    #include "wx/dcclient.h"
    #include "wx/dcscreen.h"
    #include "wx/dcmemory.h"
    #include "wx/settings.h"
    #include "wx/intl.h"
    #include "wx/log.h"
    #include "wx/frame.h"
    #include "wx/image.h"
#endif

#include "wx/msw/private.h"

#include "wx/msw/dragimag.h"
#include "wx/msw/private.h"

#ifdef __WXWINCE__  // for SM_CXCURSOR and SM_CYCURSOR
#include "wx/msw/wince/missing.h"
#endif // __WXWINCE__

// include <commctrl.h> "properly"
#include "wx/msw/wrapcctl.h"

// Wine doesn't have this yet
#ifndef ListView_CreateDragImage
#define ListView_CreateDragImage(hwnd, i, lpptUpLeft) \
    (HIMAGELIST)SNDMSG((hwnd), LVM_CREATEDRAGIMAGE, (WPARAM)(int)(i), (LPARAM)(LPPOINT)(lpptUpLeft))
#endif

// ----------------------------------------------------------------------------
// macros
// ----------------------------------------------------------------------------

IMPLEMENT_DYNAMIC_CLASS(wxDragImage, wxObject)

#define GetHimageList() ((HIMAGELIST) m_hImageList)

// ============================================================================
// implementation
// ============================================================================

// ----------------------------------------------------------------------------
// wxDragImage ctors/dtor
// ----------------------------------------------------------------------------

wxDragImage::wxDragImage()
{
    Init();
}

wxDragImage::~wxDragImage()
{
    if ( m_hImageList )
        ImageList_Destroy(GetHimageList());
#if !wxUSE_SIMPLER_DRAGIMAGE
    if ( m_hCursorImageList )
        ImageList_Destroy((HIMAGELIST) m_hCursorImageList);
#endif
}

void wxDragImage::Init()
{
    m_hImageList = 0;
#if !wxUSE_SIMPLER_DRAGIMAGE
    m_hCursorImageList = 0;
#endif
    m_window = (wxWindow*) NULL;
    m_fullScreen = false;
}

// Attributes
////////////////////////////////////////////////////////////////////////////


// Operations
////////////////////////////////////////////////////////////////////////////

// Create a drag image from a bitmap and optional cursor
bool wxDragImage::Create(const wxBitmap& image, const wxCursor& cursor)
{
    if ( m_hImageList )
        ImageList_Destroy(GetHimageList());
    m_hImageList = 0;

#ifdef __WXWINCE__
    UINT flags = ILC_COLOR;
#else
    UINT flags wxDUMMY_INITIALIZE(0) ;
    if (image.GetDepth() <= 4)
        flags = ILC_COLOR4;
    else if (image.GetDepth() <= 8)
        flags = ILC_COLOR8;
    else if (image.GetDepth() <= 16)
        flags = ILC_COLOR16;
    else if (image.GetDepth() <= 24)
        flags = ILC_COLOR24;
    else
        flags = ILC_COLOR32;
#endif

    bool mask = (image.GetMask() != 0);

    // Curiously, even if the image doesn't have a mask,
    // we still have to use ILC_MASK or the image won't show
    // up when dragged.
//    if ( mask )
    flags |= ILC_MASK;

    m_hImageList = (WXHIMAGELIST) ImageList_Create(image.GetWidth(), image.GetHeight(), flags, 1, 1);

    int index;
    if (!mask)
    {
        HBITMAP hBitmap1 = (HBITMAP) image.GetHBITMAP();
        index = ImageList_Add(GetHimageList(), hBitmap1, 0);
    }
    else
    {
        HBITMAP hBitmap1 = (HBITMAP) image.GetHBITMAP();
        HBITMAP hBitmap2 = (HBITMAP) image.GetMask()->GetMaskBitmap();
        HBITMAP hbmpMask = wxInvertMask(hBitmap2);

        index = ImageList_Add(GetHimageList(), hBitmap1, hbmpMask);
        ::DeleteObject(hbmpMask);
    }
    if ( index == -1 )
    {
        wxLogError(_("Couldn't add an image to the image list."));
    }
    m_cursor = cursor; // Can only combine with drag image after calling BeginDrag.

    return (index != -1) ;
}

// Create a drag image from an icon and optional cursor
bool wxDragImage::Create(const wxIcon& image, const wxCursor& cursor)
{
    if ( m_hImageList )
        ImageList_Destroy(GetHimageList());
    m_hImageList = 0;

#ifdef __WXWINCE__
    UINT flags = ILC_COLOR;
#else
    UINT flags wxDUMMY_INITIALIZE(0) ;
    if (image.GetDepth() <= 4)
        flags = ILC_COLOR4;
    else if (image.GetDepth() <= 8)
        flags = ILC_COLOR8;
    else if (image.GetDepth() <= 16)
        flags = ILC_COLOR16;
    else if (image.GetDepth() <= 24)
        flags = ILC_COLOR24;
    else
        flags = ILC_COLOR32;
#endif
    bool mask = true;
    if ( mask )
        flags |= ILC_MASK;

    m_hImageList = (WXHIMAGELIST) ImageList_Create(image.GetWidth(), image.GetHeight(), flags, 1, 1);

    HICON hIcon = (HICON) image.GetHICON();

    int index = ImageList_AddIcon(GetHimageList(), hIcon);
    if ( index == -1 )
    {
        wxLogError(_("Couldn't add an image to the image list."));
    }

    m_cursor = cursor; // Can only combine with drag image after calling BeginDrag.

    return (index != -1) ;
}

// Create a drag image from a string and optional cursor
bool wxDragImage::Create(const wxString& str, const wxCursor& cursor)
{
    wxFont font(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));

    long w = 0, h = 0;
    wxScreenDC dc;
    dc.SetFont(font);
    dc.GetTextExtent(str, & w, & h);
    dc.SetFont(wxNullFont);

    wxMemoryDC dc2;
    dc2.SetFont(font);
    wxBitmap bitmap((int) w+2, (int) h+2);
    dc2.SelectObject(bitmap);

    dc2.SetBackground(* wxWHITE_BRUSH);
    dc2.Clear();
    dc2.SetBackgroundMode(wxTRANSPARENT);
    dc2.SetTextForeground(* wxLIGHT_GREY);
    dc2.DrawText(str, 0, 0);
    dc2.DrawText(str, 1, 0);
    dc2.DrawText(str, 2, 0);
    dc2.DrawText(str, 1, 1);
    dc2.DrawText(str, 2, 1);
    dc2.DrawText(str, 1, 2);
    dc2.DrawText(str, 2, 2);
    dc2.SetTextForeground(* wxBLACK);
    dc2.DrawText(str, 1, 1);

    dc2.SelectObject(wxNullBitmap);

#if wxUSE_WXDIB
    // Make the bitmap masked
    wxImage image = bitmap.ConvertToImage();
    image.SetMaskColour(255, 255, 255);
    return Create(wxBitmap(image), cursor);
#else
    return false;
#endif
}

#if wxUSE_TREECTRL
// Create a drag image for the given tree control item
bool wxDragImage::Create(const wxTreeCtrl& treeCtrl, wxTreeItemId& id)
{
    if ( m_hImageList )
        ImageList_Destroy(GetHimageList());
    m_hImageList = (WXHIMAGELIST)
        TreeView_CreateDragImage(GetHwndOf(&treeCtrl), (HTREEITEM) id.m_pItem);
    return m_hImageList != 0;
}
#endif

#if wxUSE_LISTCTRL
// Create a drag image for the given list control item
bool wxDragImage::Create(const wxListCtrl& listCtrl, long id)
{
    if ( m_hImageList )
        ImageList_Destroy(GetHimageList());
    POINT pt;
    pt.x = 0; pt.y = 0;
    m_hImageList = (WXHIMAGELIST) ListView_CreateDragImage((HWND) listCtrl.GetHWND(), id, & pt);
    return true;
}
#endif

// Begin drag
bool wxDragImage::BeginDrag(const wxPoint& hotspot, wxWindow* window, bool fullScreen, wxRect* rect)
{
    wxASSERT_MSG( (m_hImageList != 0), wxT("Image list must not be null in BeginDrag."));
    wxASSERT_MSG( (window != 0), wxT("Window must not be null in BeginDrag."));

    m_fullScreen = fullScreen;
    if (rect)
        m_boundingRect = * rect;

    bool ret = (ImageList_BeginDrag(GetHimageList(), 0, hotspot.x, hotspot.y) != 0);

    if (!ret)
    {
        wxFAIL_MSG( _T("BeginDrag failed.") );

        return false;
    }

    if (m_cursor.Ok())
    {
#if wxUSE_SIMPLER_DRAGIMAGE
        m_oldCursor = window->GetCursor();
        window->SetCursor(m_cursor);
#else
        if (!m_hCursorImageList)
        {
#ifndef SM_CXCURSOR
            // Smartphone may not have these metric symbol
            int cxCursor = 16;
            int cyCursor = 16;
#else
            int cxCursor = ::GetSystemMetrics(SM_CXCURSOR);
            int cyCursor = ::GetSystemMetrics(SM_CYCURSOR);
#endif
            m_hCursorImageList = (WXHIMAGELIST) ImageList_Create(cxCursor, cyCursor, ILC_MASK, 1, 1);
        }

        // See if we can find the cursor hotspot
        wxPoint curHotSpot(hotspot);

        // Although it seems to produce the right position, when the hotspot goeos
        // negative it has strange effects on the image.
        // How do we stop the cursor jumping right and below of where it should be?
#if 0
        ICONINFO iconInfo;
        if (::GetIconInfo((HICON) (HCURSOR) m_cursor.GetHCURSOR(), & iconInfo) != 0)
        {
            curHotSpot.x -= iconInfo.xHotspot;
            curHotSpot.y -= iconInfo.yHotspot;
        }
#endif
        //wxString msg;
        //msg.Printf("Hotspot = %d, %d", curHotSpot.x, curHotSpot.y);
        //wxLogDebug(msg);

        // First add the cursor to the image list
        HCURSOR hCursor = (HCURSOR) m_cursor.GetHCURSOR();
        int cursorIndex = ImageList_AddIcon((HIMAGELIST) m_hCursorImageList, (HICON) hCursor);

        wxASSERT_MSG( (cursorIndex != -1), wxT("ImageList_AddIcon failed in BeginDrag."));

        if (cursorIndex != -1)
        {
            ImageList_SetDragCursorImage((HIMAGELIST) m_hCursorImageList, cursorIndex, curHotSpot.x, curHotSpot.y);
        }
#endif
    }

#if !wxUSE_SIMPLER_DRAGIMAGE
    if (m_cursor.Ok())
        ::ShowCursor(FALSE);
#endif

    m_window = window;

    ::SetCapture(GetHwndOf(window));

    return true;
}

// Begin drag. hotspot is the location of the drag position relative to the upper-left
// corner of the image. This is full screen only. fullScreenRect gives the
// position of the window on the screen, to restrict the drag to.
bool wxDragImage::BeginDrag(const wxPoint& hotspot, wxWindow* window, wxWindow* fullScreenRect)
{
    wxRect rect;

    int x = fullScreenRect->GetPosition().x;
    int y = fullScreenRect->GetPosition().y;

    wxSize sz = fullScreenRect->GetSize();

    if (fullScreenRect->GetParent() && !fullScreenRect->IsKindOf(CLASSINFO(wxFrame)))
        fullScreenRect->GetParent()->ClientToScreen(& x, & y);

    rect.x = x; rect.y = y;
    rect.width = sz.x; rect.height = sz.y;

    return BeginDrag(hotspot, window, true, & rect);
}

// End drag
bool wxDragImage::EndDrag()
{
    wxASSERT_MSG( (m_hImageList != 0), wxT("Image list must not be null in EndDrag."));

    ImageList_EndDrag();

    if ( !::ReleaseCapture() )
    {
        wxLogLastError(wxT("ReleaseCapture"));
    }

#if wxUSE_SIMPLER_DRAGIMAGE
    if (m_cursor.Ok() && m_oldCursor.Ok())
        m_window->SetCursor(m_oldCursor);
#else
    ::ShowCursor(TRUE);
#endif

    m_window = (wxWindow*) NULL;

    return true;
}

// Move the image: call from OnMouseMove. Pt is in window client coordinates if window
// is non-NULL, or in screen coordinates if NULL.
bool wxDragImage::Move(const wxPoint& pt)
{
    wxASSERT_MSG( (m_hImageList != 0), wxT("Image list must not be null in Move."));

    // These are in window, not client coordinates.
    // So need to convert to client coordinates.
    wxPoint pt2(pt);
    if (m_window && !m_fullScreen)
    {
        RECT rect;
        rect.left = 0; rect.top = 0;
        rect.right = 0; rect.bottom = 0;
        DWORD style = ::GetWindowLong((HWND) m_window->GetHWND(), GWL_STYLE);
#ifdef __WIN32__
        DWORD exStyle = ::GetWindowLong((HWND) m_window->GetHWND(), GWL_EXSTYLE);
        ::AdjustWindowRectEx(& rect, style, FALSE, exStyle);
#else
        ::AdjustWindowRect(& rect, style, FALSE);
#endif
        // Subtract the (negative) values, i.e. add a small increment
        pt2.x -= rect.left; pt2.y -= rect.top;
    }
    else if (m_window && m_fullScreen)
    {
        pt2 = m_window->ClientToScreen(pt2);
    }

    bool ret = (ImageList_DragMove( pt2.x, pt2.y ) != 0);

    m_position = pt2;

    return ret;
}

bool wxDragImage::Show()
{
    wxASSERT_MSG( (m_hImageList != 0), wxT("Image list must not be null in Show."));

    HWND hWnd = 0;
    if (m_window && !m_fullScreen)
        hWnd = (HWND) m_window->GetHWND();

    bool ret = (ImageList_DragEnter( hWnd, m_position.x, m_position.y ) != 0);

    return ret;
}

bool wxDragImage::Hide()
{
    wxASSERT_MSG( (m_hImageList != 0), wxT("Image list must not be null in Hide."));

    HWND hWnd = 0;
    if (m_window && !m_fullScreen)
        hWnd = (HWND) m_window->GetHWND();

    bool ret = (ImageList_DragLeave( hWnd ) != 0);

    return ret;
}

#endif // wxUSE_DRAGIMAGE
Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: src/msw/dragimag.cpp
	3	// Purpose: wxDragImage
	4	// Author: Julian Smart
	5	// Modified by:
	6	// Created: 08/04/99
	7	// RCS-ID: $Id$
	8	// Copyright: (c) Julian Smart
	9	// Licence: wxWindows licence
	10	/////////////////////////////////////////////////////////////////////////////
	11
	12	// ============================================================================
	13	// declarations
	14	// ============================================================================
	15
	16	// ----------------------------------------------------------------------------
	17	// headers
	18	// ----------------------------------------------------------------------------
	19
	20	// For compilers that support precompilation, includes "wx.h".
	21	#include "wx/wxprec.h"
	22
	23	#ifdef __BORLANDC__
	24	#pragma hdrstop
	25	#endif
	26
	27	#if wxUSE_DRAGIMAGE
	28
	29	#ifndef WX_PRECOMP
	30	#include <stdio.h>
	31	#include "wx/window.h"
	32	#include "wx/dcclient.h"
	33	#include "wx/dcscreen.h"
	34	#include "wx/dcmemory.h"
	35	#include "wx/settings.h"
	36	#include "wx/intl.h"
	37	#include "wx/log.h"
	38	#include "wx/frame.h"
	39	#include "wx/image.h"
	40	#endif
	41
	42	#include "wx/msw/private.h"
	43
	44	#include "wx/msw/dragimag.h"
	45	#include "wx/msw/private.h"
	46
	47	#ifdef __WXWINCE__ // for SM_CXCURSOR and SM_CYCURSOR
	48	#include "wx/msw/wince/missing.h"
	49	#endif // __WXWINCE__
	50
	51	// include <commctrl.h> "properly"
	52	#include "wx/msw/wrapcctl.h"
	53
	54	// Wine doesn't have this yet
	55	#ifndef ListView_CreateDragImage
	56	#define ListView_CreateDragImage(hwnd, i, lpptUpLeft) \
	57	(HIMAGELIST)SNDMSG((hwnd), LVM_CREATEDRAGIMAGE, (WPARAM)(int)(i), (LPARAM)(LPPOINT)(lpptUpLeft))
	58	#endif
	59
	60	// ----------------------------------------------------------------------------
	61	// macros
	62	// ----------------------------------------------------------------------------
	63
	64	IMPLEMENT_DYNAMIC_CLASS(wxDragImage, wxObject)
	65
	66	#define GetHimageList() ((HIMAGELIST) m_hImageList)
	67
	68	// ============================================================================
	69	// implementation
	70	// ============================================================================
	71
	72	// ----------------------------------------------------------------------------
	73	// wxDragImage ctors/dtor
	74	// ----------------------------------------------------------------------------
	75
	76	wxDragImage::wxDragImage()
	77	{
	78	Init();
	79	}
	80
	81	wxDragImage::~wxDragImage()
	82	{
	83	if ( m_hImageList )
	84	ImageList_Destroy(GetHimageList());
	85	#if !wxUSE_SIMPLER_DRAGIMAGE
	86	if ( m_hCursorImageList )
	87	ImageList_Destroy((HIMAGELIST) m_hCursorImageList);
	88	#endif
	89	}
	90
	91	void wxDragImage::Init()
	92	{
	93	m_hImageList = 0;
	94	#if !wxUSE_SIMPLER_DRAGIMAGE
	95	m_hCursorImageList = 0;
	96	#endif
	97	m_window = (wxWindow*) NULL;
	98	m_fullScreen = false;
	99	}
	100
	101	// Attributes
	102	////////////////////////////////////////////////////////////////////////////
	103
	104
	105	// Operations
	106	////////////////////////////////////////////////////////////////////////////
	107
	108	// Create a drag image from a bitmap and optional cursor
	109	bool wxDragImage::Create(const wxBitmap& image, const wxCursor& cursor)
	110	{
	111	if ( m_hImageList )
	112	ImageList_Destroy(GetHimageList());
	113	m_hImageList = 0;
	114
	115	#ifdef __WXWINCE__
	116	UINT flags = ILC_COLOR;
	117	#else
	118	UINT flags wxDUMMY_INITIALIZE(0) ;
	119	if (image.GetDepth() <= 4)
	120	flags = ILC_COLOR4;
	121	else if (image.GetDepth() <= 8)
	122	flags = ILC_COLOR8;
	123	else if (image.GetDepth() <= 16)
	124	flags = ILC_COLOR16;
	125	else if (image.GetDepth() <= 24)
	126	flags = ILC_COLOR24;
	127	else
	128	flags = ILC_COLOR32;
	129	#endif
	130
	131	bool mask = (image.GetMask() != 0);
	132
	133	// Curiously, even if the image doesn't have a mask,
	134	// we still have to use ILC_MASK or the image won't show
	135	// up when dragged.
	136	// if ( mask )
	137	flags \|= ILC_MASK;
	138
	139	m_hImageList = (WXHIMAGELIST) ImageList_Create(image.GetWidth(), image.GetHeight(), flags, 1, 1);
	140
	141	int index;
	142	if (!mask)
	143	{
	144	HBITMAP hBitmap1 = (HBITMAP) image.GetHBITMAP();
	145	index = ImageList_Add(GetHimageList(), hBitmap1, 0);
	146	}
	147	else
	148	{
	149	HBITMAP hBitmap1 = (HBITMAP) image.GetHBITMAP();
	150	HBITMAP hBitmap2 = (HBITMAP) image.GetMask()->GetMaskBitmap();
	151	HBITMAP hbmpMask = wxInvertMask(hBitmap2);
	152
	153	index = ImageList_Add(GetHimageList(), hBitmap1, hbmpMask);
	154	::DeleteObject(hbmpMask);
	155	}
	156	if ( index == -1 )
	157	{
	158	wxLogError(_("Couldn't add an image to the image list."));
	159	}
	160	m_cursor = cursor; // Can only combine with drag image after calling BeginDrag.
	161
	162	return (index != -1) ;
	163	}
	164
	165	// Create a drag image from an icon and optional cursor
	166	bool wxDragImage::Create(const wxIcon& image, const wxCursor& cursor)
	167	{
	168	if ( m_hImageList )
	169	ImageList_Destroy(GetHimageList());
	170	m_hImageList = 0;
	171
	172	#ifdef __WXWINCE__
	173	UINT flags = ILC_COLOR;
	174	#else
	175	UINT flags wxDUMMY_INITIALIZE(0) ;
	176	if (image.GetDepth() <= 4)
	177	flags = ILC_COLOR4;
	178	else if (image.GetDepth() <= 8)
	179	flags = ILC_COLOR8;
	180	else if (image.GetDepth() <= 16)
	181	flags = ILC_COLOR16;
	182	else if (image.GetDepth() <= 24)
	183	flags = ILC_COLOR24;
	184	else
	185	flags = ILC_COLOR32;
	186	#endif
	187	bool mask = true;
	188	if ( mask )
	189	flags \|= ILC_MASK;
	190
	191	m_hImageList = (WXHIMAGELIST) ImageList_Create(image.GetWidth(), image.GetHeight(), flags, 1, 1);
	192
	193	HICON hIcon = (HICON) image.GetHICON();
	194
	195	int index = ImageList_AddIcon(GetHimageList(), hIcon);
	196	if ( index == -1 )
	197	{
	198	wxLogError(_("Couldn't add an image to the image list."));
	199	}
	200
	201	m_cursor = cursor; // Can only combine with drag image after calling BeginDrag.
	202
	203	return (index != -1) ;
	204	}
	205
	206	// Create a drag image from a string and optional cursor
	207	bool wxDragImage::Create(const wxString& str, const wxCursor& cursor)
	208	{
	209	wxFont font(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
	210
	211	long w = 0, h = 0;
	212	wxScreenDC dc;
	213	dc.SetFont(font);
	214	dc.GetTextExtent(str, & w, & h);
	215	dc.SetFont(wxNullFont);
	216
	217	wxMemoryDC dc2;
	218	dc2.SetFont(font);
	219	wxBitmap bitmap((int) w+2, (int) h+2);
	220	dc2.SelectObject(bitmap);
	221
	222	dc2.SetBackground(* wxWHITE_BRUSH);
	223	dc2.Clear();
	224	dc2.SetBackgroundMode(wxTRANSPARENT);
	225	dc2.SetTextForeground(* wxLIGHT_GREY);
	226	dc2.DrawText(str, 0, 0);
	227	dc2.DrawText(str, 1, 0);
	228	dc2.DrawText(str, 2, 0);
	229	dc2.DrawText(str, 1, 1);
	230	dc2.DrawText(str, 2, 1);
	231	dc2.DrawText(str, 1, 2);
	232	dc2.DrawText(str, 2, 2);
	233	dc2.SetTextForeground(* wxBLACK);
	234	dc2.DrawText(str, 1, 1);
	235
	236	dc2.SelectObject(wxNullBitmap);
	237
	238	#if wxUSE_WXDIB
	239	// Make the bitmap masked
	240	wxImage image = bitmap.ConvertToImage();
	241	image.SetMaskColour(255, 255, 255);
	242	return Create(wxBitmap(image), cursor);
	243	#else
	244	return false;
	245	#endif
	246	}
	247
	248	#if wxUSE_TREECTRL
	249	// Create a drag image for the given tree control item
	250	bool wxDragImage::Create(const wxTreeCtrl& treeCtrl, wxTreeItemId& id)
	251	{
	252	if ( m_hImageList )
	253	ImageList_Destroy(GetHimageList());
	254	m_hImageList = (WXHIMAGELIST)
	255	TreeView_CreateDragImage(GetHwndOf(&treeCtrl), (HTREEITEM) id.m_pItem);
	256	return m_hImageList != 0;
	257	}
	258	#endif
	259
	260	#if wxUSE_LISTCTRL
	261	// Create a drag image for the given list control item
	262	bool wxDragImage::Create(const wxListCtrl& listCtrl, long id)
	263	{
	264	if ( m_hImageList )
	265	ImageList_Destroy(GetHimageList());
	266	POINT pt;
	267	pt.x = 0; pt.y = 0;
	268	m_hImageList = (WXHIMAGELIST) ListView_CreateDragImage((HWND) listCtrl.GetHWND(), id, & pt);
	269	return true;
	270	}
	271	#endif
	272
	273	// Begin drag
	274	bool wxDragImage::BeginDrag(const wxPoint& hotspot, wxWindow* window, bool fullScreen, wxRect* rect)
	275	{
	276	wxASSERT_MSG( (m_hImageList != 0), wxT("Image list must not be null in BeginDrag."));
	277	wxASSERT_MSG( (window != 0), wxT("Window must not be null in BeginDrag."));
	278
	279	m_fullScreen = fullScreen;
	280	if (rect)
	281	m_boundingRect = * rect;
	282
	283	bool ret = (ImageList_BeginDrag(GetHimageList(), 0, hotspot.x, hotspot.y) != 0);
	284
	285	if (!ret)
	286	{
	287	wxFAIL_MSG( _T("BeginDrag failed.") );
	288
	289	return false;
	290	}
	291
	292	if (m_cursor.Ok())
	293	{
	294	#if wxUSE_SIMPLER_DRAGIMAGE
	295	m_oldCursor = window->GetCursor();
	296	window->SetCursor(m_cursor);
	297	#else
	298	if (!m_hCursorImageList)
	299	{
	300	#ifndef SM_CXCURSOR
	301	// Smartphone may not have these metric symbol
	302	int cxCursor = 16;
	303	int cyCursor = 16;
	304	#else
	305	int cxCursor = ::GetSystemMetrics(SM_CXCURSOR);
	306	int cyCursor = ::GetSystemMetrics(SM_CYCURSOR);
	307	#endif
	308	m_hCursorImageList = (WXHIMAGELIST) ImageList_Create(cxCursor, cyCursor, ILC_MASK, 1, 1);
	309	}
	310
	311	// See if we can find the cursor hotspot
	312	wxPoint curHotSpot(hotspot);
	313
	314	// Although it seems to produce the right position, when the hotspot goeos
	315	// negative it has strange effects on the image.
	316	// How do we stop the cursor jumping right and below of where it should be?
	317	#if 0
	318	ICONINFO iconInfo;
	319	if (::GetIconInfo((HICON) (HCURSOR) m_cursor.GetHCURSOR(), & iconInfo) != 0)
	320	{
	321	curHotSpot.x -= iconInfo.xHotspot;
	322	curHotSpot.y -= iconInfo.yHotspot;
	323	}
	324	#endif
	325	//wxString msg;
	326	//msg.Printf("Hotspot = %d, %d", curHotSpot.x, curHotSpot.y);
	327	//wxLogDebug(msg);
	328
	329	// First add the cursor to the image list
	330	HCURSOR hCursor = (HCURSOR) m_cursor.GetHCURSOR();
	331	int cursorIndex = ImageList_AddIcon((HIMAGELIST) m_hCursorImageList, (HICON) hCursor);
	332
	333	wxASSERT_MSG( (cursorIndex != -1), wxT("ImageList_AddIcon failed in BeginDrag."));
	334
	335	if (cursorIndex != -1)
	336	{
	337	ImageList_SetDragCursorImage((HIMAGELIST) m_hCursorImageList, cursorIndex, curHotSpot.x, curHotSpot.y);
	338	}
	339	#endif
	340	}
	341
	342	#if !wxUSE_SIMPLER_DRAGIMAGE
	343	if (m_cursor.Ok())
	344	::ShowCursor(FALSE);
	345	#endif
	346
	347	m_window = window;
	348
	349	::SetCapture(GetHwndOf(window));
	350
	351	return true;
	352	}
	353
	354	// Begin drag. hotspot is the location of the drag position relative to the upper-left
	355	// corner of the image. This is full screen only. fullScreenRect gives the
	356	// position of the window on the screen, to restrict the drag to.
	357	bool wxDragImage::BeginDrag(const wxPoint& hotspot, wxWindow* window, wxWindow* fullScreenRect)
	358	{
	359	wxRect rect;
	360
	361	int x = fullScreenRect->GetPosition().x;
	362	int y = fullScreenRect->GetPosition().y;
	363
	364	wxSize sz = fullScreenRect->GetSize();
	365
	366	if (fullScreenRect->GetParent() && !fullScreenRect->IsKindOf(CLASSINFO(wxFrame)))
	367	fullScreenRect->GetParent()->ClientToScreen(& x, & y);
	368
	369	rect.x = x; rect.y = y;
	370	rect.width = sz.x; rect.height = sz.y;
	371
	372	return BeginDrag(hotspot, window, true, & rect);
	373	}
	374
	375	// End drag
	376	bool wxDragImage::EndDrag()
	377	{
	378	wxASSERT_MSG( (m_hImageList != 0), wxT("Image list must not be null in EndDrag."));
	379
	380	ImageList_EndDrag();
	381
	382	if ( !::ReleaseCapture() )
	383	{
	384	wxLogLastError(wxT("ReleaseCapture"));
	385	}
	386
	387	#if wxUSE_SIMPLER_DRAGIMAGE
	388	if (m_cursor.Ok() && m_oldCursor.Ok())
	389	m_window->SetCursor(m_oldCursor);
	390	#else
	391	::ShowCursor(TRUE);
	392	#endif
	393
	394	m_window = (wxWindow*) NULL;
	395
	396	return true;
	397	}
	398
	399	// Move the image: call from OnMouseMove. Pt is in window client coordinates if window
	400	// is non-NULL, or in screen coordinates if NULL.
	401	bool wxDragImage::Move(const wxPoint& pt)
	402	{
	403	wxASSERT_MSG( (m_hImageList != 0), wxT("Image list must not be null in Move."));
	404
	405	// These are in window, not client coordinates.
	406	// So need to convert to client coordinates.
	407	wxPoint pt2(pt);
	408	if (m_window && !m_fullScreen)
	409	{
	410	RECT rect;
	411	rect.left = 0; rect.top = 0;
	412	rect.right = 0; rect.bottom = 0;
	413	DWORD style = ::GetWindowLong((HWND) m_window->GetHWND(), GWL_STYLE);
	414	#ifdef __WIN32__
	415	DWORD exStyle = ::GetWindowLong((HWND) m_window->GetHWND(), GWL_EXSTYLE);
	416	::AdjustWindowRectEx(& rect, style, FALSE, exStyle);
	417	#else
	418	::AdjustWindowRect(& rect, style, FALSE);
	419	#endif
	420	// Subtract the (negative) values, i.e. add a small increment
	421	pt2.x -= rect.left; pt2.y -= rect.top;
	422	}
	423	else if (m_window && m_fullScreen)
	424	{
	425	pt2 = m_window->ClientToScreen(pt2);
	426	}
	427
	428	bool ret = (ImageList_DragMove( pt2.x, pt2.y ) != 0);
	429
	430	m_position = pt2;
	431
	432	return ret;
	433	}
	434
	435	bool wxDragImage::Show()
	436	{
	437	wxASSERT_MSG( (m_hImageList != 0), wxT("Image list must not be null in Show."));
	438
	439	HWND hWnd = 0;
	440	if (m_window && !m_fullScreen)
	441	hWnd = (HWND) m_window->GetHWND();
	442
	443	bool ret = (ImageList_DragEnter( hWnd, m_position.x, m_position.y ) != 0);
	444
	445	return ret;
	446	}
	447
	448	bool wxDragImage::Hide()
	449	{
	450	wxASSERT_MSG( (m_hImageList != 0), wxT("Image list must not be null in Hide."));
	451
	452	HWND hWnd = 0;
	453	if (m_window && !m_fullScreen)
	454	hWnd = (HWND) m_window->GetHWND();
	455
	456	bool ret = (ImageList_DragLeave( hWnd ) != 0);
	457
	458	return ret;
	459	}
	460
	461	#endif // wxUSE_DRAGIMAGE