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

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