src/msw/dragimag.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        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
// ----------------------------------------------------------------------------

#ifdef __GNUG__
#pragma implementation "dragimag.h"
#endif

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

#ifdef __BORLANDC__
#pragma hdrstop
#endif

#if wxUSE_DRAGIMAGE

#if defined(__WIN95__)

#ifndef WX_PRECOMP
#include <stdio.h>
#include "wx/setup.h"
#include "wx/window.h"
#include "wx/dcclient.h"
#include "wx/dcscreen.h"
#include "wx/dcmemory.h"
#include "wx/settings.h"
#endif

#include "wx/msw/private.h"
#include "wx/log.h"
#include "wx/intl.h"
#include "wx/frame.h"
#include "wx/image.h"

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

#if defined(__WIN95__) && !((defined(__GNUWIN32_OLD__) || defined(__TWIN32__)) && !defined(__CYGWIN10__))
#include <commctrl.h>
#endif

// 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;

    UINT flags = 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;

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

    UINT flags = 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;
    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, h;
    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);

    // Make the bitmap masked
    wxImage image = bitmap.ConvertToImage();
    image.SetMaskColour(255, 255, 255);
    return Create(wxBitmap(image), cursor);
}

// 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((HWND) treeCtrl.GetHWND(), (HTREEITEM) (WXHTREEITEM) id);
    return TRUE;
}

// 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;
}

// 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)
        {
            int cxCursor = GetSystemMetrics(SM_CXCURSOR);
            int cyCursor = GetSystemMetrics(SM_CYCURSOR);

            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
    // __WIN95__

#endif // wxUSE_DRAGIMAGE
Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: 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	#ifdef __GNUG__
	21	#pragma implementation "dragimag.h"
	22	#endif
	23
	24	// For compilers that support precompilation, includes "wx.h".
	25	#include "wx/wxprec.h"
	26
	27	#ifdef __BORLANDC__
	28	#pragma hdrstop
	29	#endif
	30
	31	#if wxUSE_DRAGIMAGE
	32
	33	#if defined(__WIN95__)
	34
	35	#ifndef WX_PRECOMP
	36	#include <stdio.h>
	37	#include "wx/setup.h"
	38	#include "wx/window.h"
	39	#include "wx/dcclient.h"
	40	#include "wx/dcscreen.h"
	41	#include "wx/dcmemory.h"
	42	#include "wx/settings.h"
	43	#endif
	44
	45	#include "wx/msw/private.h"
	46	#include "wx/log.h"
	47	#include "wx/intl.h"
	48	#include "wx/frame.h"
	49	#include "wx/image.h"
	50
	51	#include "wx/msw/dragimag.h"
	52	#include "wx/msw/private.h"
	53
	54	#if defined(__WIN95__) && !((defined(__GNUWIN32_OLD__) \|\| defined(__TWIN32__)) && !defined(__CYGWIN10__))
	55	#include <commctrl.h>
	56	#endif
	57
	58	// Wine doesn't have this yet
	59	#ifndef ListView_CreateDragImage
	60	#define ListView_CreateDragImage(hwnd, i, lpptUpLeft) \
	61	(HIMAGELIST)SNDMSG((hwnd), LVM_CREATEDRAGIMAGE, (WPARAM)(int)(i), (LPARAM)(LPPOINT)(lpptUpLeft))
	62	#endif
	63
	64	// ----------------------------------------------------------------------------
	65	// macros
	66	// ----------------------------------------------------------------------------
	67
	68	IMPLEMENT_DYNAMIC_CLASS(wxDragImage, wxObject)
	69
	70	#define GetHimageList() ((HIMAGELIST) m_hImageList)
	71
	72	// ============================================================================
	73	// implementation
	74	// ============================================================================
	75
	76	// ----------------------------------------------------------------------------
	77	// wxDragImage ctors/dtor
	78	// ----------------------------------------------------------------------------
	79
	80	wxDragImage::wxDragImage()
	81	{
	82	Init();
	83	}
	84
	85	wxDragImage::~wxDragImage()
	86	{
	87	if ( m_hImageList )
	88	ImageList_Destroy(GetHimageList());
	89	#if !wxUSE_SIMPLER_DRAGIMAGE
	90	if ( m_hCursorImageList )
	91	ImageList_Destroy((HIMAGELIST) m_hCursorImageList);
	92	#endif
	93	}
	94
	95	void wxDragImage::Init()
	96	{
	97	m_hImageList = 0;
	98	#if !wxUSE_SIMPLER_DRAGIMAGE
	99	m_hCursorImageList = 0;
	100	#endif
	101	m_window = (wxWindow*) NULL;
	102	m_fullScreen = FALSE;
	103	}
	104
	105	// Attributes
	106	////////////////////////////////////////////////////////////////////////////
	107
	108
	109	// Operations
	110	////////////////////////////////////////////////////////////////////////////
	111
	112	// Create a drag image from a bitmap and optional cursor
	113	bool wxDragImage::Create(const wxBitmap& image, const wxCursor& cursor)
	114	{
	115	if ( m_hImageList )
	116	ImageList_Destroy(GetHimageList());
	117	m_hImageList = 0;
	118
	119	UINT flags = 0 ;
	120	if (image.GetDepth() <= 4)
	121	flags = ILC_COLOR4;
	122	else if (image.GetDepth() <= 8)
	123	flags = ILC_COLOR8;
	124	else if (image.GetDepth() <= 16)
	125	flags = ILC_COLOR16;
	126	else if (image.GetDepth() <= 24)
	127	flags = ILC_COLOR24;
	128	else
	129	flags = ILC_COLOR32;
	130
	131	bool mask = (image.GetMask() != 0);
	132	if ( mask )
	133	flags \|= ILC_MASK;
	134
	135	m_hImageList = (WXHIMAGELIST) ImageList_Create(image.GetWidth(), image.GetHeight(), flags, 1, 1);
	136
	137	int index;
	138	if (!mask)
	139	{
	140	HBITMAP hBitmap1 = (HBITMAP) image.GetHBITMAP();
	141	index = ImageList_Add(GetHimageList(), hBitmap1, 0);
	142	}
	143	else
	144	{
	145	HBITMAP hBitmap1 = (HBITMAP) image.GetHBITMAP();
	146	HBITMAP hBitmap2 = (HBITMAP) image.GetMask()->GetMaskBitmap();
	147	HBITMAP hbmpMask = wxInvertMask(hBitmap2);
	148
	149	index = ImageList_Add(GetHimageList(), hBitmap1, hbmpMask);
	150	::DeleteObject(hbmpMask);
	151	}
	152	if ( index == -1 )
	153	{
	154	wxLogError(_("Couldn't add an image to the image list."));
	155	}
	156	m_cursor = cursor; // Can only combine with drag image after calling BeginDrag.
	157
	158	return (index != -1) ;
	159	}
	160
	161	// Create a drag image from an icon and optional cursor
	162	bool wxDragImage::Create(const wxIcon& image, const wxCursor& cursor)
	163	{
	164	if ( m_hImageList )
	165	ImageList_Destroy(GetHimageList());
	166	m_hImageList = 0;
	167
	168	UINT flags = 0 ;
	169	if (image.GetDepth() <= 4)
	170	flags = ILC_COLOR4;
	171	else if (image.GetDepth() <= 8)
	172	flags = ILC_COLOR8;
	173	else if (image.GetDepth() <= 16)
	174	flags = ILC_COLOR16;
	175	else if (image.GetDepth() <= 24)
	176	flags = ILC_COLOR24;
	177	else
	178	flags = ILC_COLOR32;
	179	bool mask = TRUE;
	180	if ( mask )
	181	flags \|= ILC_MASK;
	182
	183	m_hImageList = (WXHIMAGELIST) ImageList_Create(image.GetWidth(), image.GetHeight(), flags, 1, 1);
	184
	185	HICON hIcon = (HICON) image.GetHICON();
	186
	187	int index = ImageList_AddIcon(GetHimageList(), hIcon);
	188	if ( index == -1 )
	189	{
	190	wxLogError(_("Couldn't add an image to the image list."));
	191	}
	192
	193	m_cursor = cursor; // Can only combine with drag image after calling BeginDrag.
	194
	195	return (index != -1) ;
	196	}
	197
	198	// Create a drag image from a string and optional cursor
	199	bool wxDragImage::Create(const wxString& str, const wxCursor& cursor)
	200	{
	201	wxFont font(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
	202
	203	long w, h;
	204	wxScreenDC dc;
	205	dc.SetFont(font);
	206	dc.GetTextExtent(str, & w, & h);
	207	dc.SetFont(wxNullFont);
	208
	209	wxMemoryDC dc2;
	210	dc2.SetFont(font);
	211	wxBitmap bitmap((int) w+2, (int) h+2);
	212	dc2.SelectObject(bitmap);
	213
	214	dc2.SetBackground(* wxWHITE_BRUSH);
	215	dc2.Clear();
	216	dc2.SetBackgroundMode(wxTRANSPARENT);
	217	dc2.SetTextForeground(* wxLIGHT_GREY);
	218	dc2.DrawText(str, 0, 0);
	219	dc2.DrawText(str, 1, 0);
	220	dc2.DrawText(str, 2, 0);
	221	dc2.DrawText(str, 1, 1);
	222	dc2.DrawText(str, 2, 1);
	223	dc2.DrawText(str, 1, 2);
	224	dc2.DrawText(str, 2, 2);
	225	dc2.SetTextForeground(* wxBLACK);
	226	dc2.DrawText(str, 1, 1);
	227
	228	dc2.SelectObject(wxNullBitmap);
	229
	230	// Make the bitmap masked
	231	wxImage image = bitmap.ConvertToImage();
	232	image.SetMaskColour(255, 255, 255);
	233	return Create(wxBitmap(image), cursor);
	234	}
	235
	236	// Create a drag image for the given tree control item
	237	bool wxDragImage::Create(const wxTreeCtrl& treeCtrl, wxTreeItemId& id)
	238	{
	239	if ( m_hImageList )
	240	ImageList_Destroy(GetHimageList());
	241	m_hImageList = (WXHIMAGELIST) TreeView_CreateDragImage((HWND) treeCtrl.GetHWND(), (HTREEITEM) (WXHTREEITEM) id);
	242	return TRUE;
	243	}
	244
	245	// Create a drag image for the given list control item
	246	bool wxDragImage::Create(const wxListCtrl& listCtrl, long id)
	247	{
	248	if ( m_hImageList )
	249	ImageList_Destroy(GetHimageList());
	250	POINT pt;
	251	pt.x = 0; pt.y = 0;
	252	m_hImageList = (WXHIMAGELIST) ListView_CreateDragImage((HWND) listCtrl.GetHWND(), id, & pt);
	253	return TRUE;
	254	}
	255
	256	// Begin drag
	257	bool wxDragImage::BeginDrag(const wxPoint& hotspot, wxWindow* window, bool fullScreen, wxRect* rect)
	258	{
	259	wxASSERT_MSG( (m_hImageList != 0), wxT("Image list must not be null in BeginDrag."));
	260	wxASSERT_MSG( (window != 0), wxT("Window must not be null in BeginDrag."));
	261
	262	m_fullScreen = fullScreen;
	263	if (rect)
	264	m_boundingRect = * rect;
	265
	266	bool ret = (ImageList_BeginDrag(GetHimageList(), 0, hotspot.x, hotspot.y) != 0);
	267
	268	if (!ret)
	269	{
	270	wxFAIL_MSG( _T("BeginDrag failed.") );
	271
	272	return FALSE;
	273	}
	274
	275	if (m_cursor.Ok())
	276	{
	277	#if wxUSE_SIMPLER_DRAGIMAGE
	278	m_oldCursor = window->GetCursor();
	279	window->SetCursor(m_cursor);
	280	#else
	281	if (!m_hCursorImageList)
	282	{
	283	int cxCursor = GetSystemMetrics(SM_CXCURSOR);
	284	int cyCursor = GetSystemMetrics(SM_CYCURSOR);
	285
	286	m_hCursorImageList = (WXHIMAGELIST) ImageList_Create(cxCursor, cyCursor, ILC_MASK, 1, 1);
	287	}
	288
	289	// See if we can find the cursor hotspot
	290	wxPoint curHotSpot(hotspot);
	291
	292	// Although it seems to produce the right position, when the hotspot goeos
	293	// negative it has strange effects on the image.
	294	// How do we stop the cursor jumping right and below of where it should be?
	295	#if 0
	296	ICONINFO iconInfo;
	297	if (::GetIconInfo((HICON) (HCURSOR) m_cursor.GetHCURSOR(), & iconInfo) != 0)
	298	{
	299	curHotSpot.x -= iconInfo.xHotspot;
	300	curHotSpot.y -= iconInfo.yHotspot;
	301	}
	302	#endif
	303	//wxString msg;
	304	//msg.Printf("Hotspot = %d, %d", curHotSpot.x, curHotSpot.y);
	305	//wxLogDebug(msg);
	306
	307	// First add the cursor to the image list
	308	HCURSOR hCursor = (HCURSOR) m_cursor.GetHCURSOR();
	309	int cursorIndex = ImageList_AddIcon((HIMAGELIST) m_hCursorImageList, (HICON) hCursor);
	310
	311	wxASSERT_MSG( (cursorIndex != -1), wxT("ImageList_AddIcon failed in BeginDrag."));
	312
	313	if (cursorIndex != -1)
	314	{
	315	ImageList_SetDragCursorImage((HIMAGELIST) m_hCursorImageList, cursorIndex, curHotSpot.x, curHotSpot.y);
	316	}
	317	#endif
	318	}
	319
	320	#if !wxUSE_SIMPLER_DRAGIMAGE
	321	if (m_cursor.Ok())
	322	::ShowCursor(FALSE);
	323	#endif
	324
	325	m_window = window;
	326
	327	::SetCapture(GetHwndOf(window));
	328
	329	return TRUE;
	330	}
	331
	332	// Begin drag. hotspot is the location of the drag position relative to the upper-left
	333	// corner of the image. This is full screen only. fullScreenRect gives the
	334	// position of the window on the screen, to restrict the drag to.
	335	bool wxDragImage::BeginDrag(const wxPoint& hotspot, wxWindow* window, wxWindow* fullScreenRect)
	336	{
	337	wxRect rect;
	338
	339	int x = fullScreenRect->GetPosition().x;
	340	int y = fullScreenRect->GetPosition().y;
	341
	342	wxSize sz = fullScreenRect->GetSize();
	343
	344	if (fullScreenRect->GetParent() && !fullScreenRect->IsKindOf(CLASSINFO(wxFrame)))
	345	fullScreenRect->GetParent()->ClientToScreen(& x, & y);
	346
	347	rect.x = x; rect.y = y;
	348	rect.width = sz.x; rect.height = sz.y;
	349
	350	return BeginDrag(hotspot, window, TRUE, & rect);
	351	}
	352
	353	// End drag
	354	bool wxDragImage::EndDrag()
	355	{
	356	wxASSERT_MSG( (m_hImageList != 0), wxT("Image list must not be null in EndDrag."));
	357
	358	ImageList_EndDrag();
	359
	360	if ( !::ReleaseCapture() )
	361	{
	362	wxLogLastError(wxT("ReleaseCapture"));
	363	}
	364
	365	#if wxUSE_SIMPLER_DRAGIMAGE
	366	if (m_cursor.Ok() && m_oldCursor.Ok())
	367	m_window->SetCursor(m_oldCursor);
	368	#else
	369	::ShowCursor(TRUE);
	370	#endif
	371
	372	m_window = (wxWindow*) NULL;
	373
	374	return TRUE;
	375	}
	376
	377	// Move the image: call from OnMouseMove. Pt is in window client coordinates if window
	378	// is non-NULL, or in screen coordinates if NULL.
	379	bool wxDragImage::Move(const wxPoint& pt)
	380	{
	381	wxASSERT_MSG( (m_hImageList != 0), wxT("Image list must not be null in Move."));
	382
	383	// These are in window, not client coordinates.
	384	// So need to convert to client coordinates.
	385	wxPoint pt2(pt);
	386	if (m_window && !m_fullScreen)
	387	{
	388	RECT rect;
	389	rect.left = 0; rect.top = 0;
	390	rect.right = 0; rect.bottom = 0;
	391	DWORD style = ::GetWindowLong((HWND) m_window->GetHWND(), GWL_STYLE);
	392	#ifdef __WIN32__
	393	DWORD exStyle = ::GetWindowLong((HWND) m_window->GetHWND(), GWL_EXSTYLE);
	394	::AdjustWindowRectEx(& rect, style, FALSE, exStyle);
	395	#else
	396	::AdjustWindowRect(& rect, style, FALSE);
	397	#endif
	398	// Subtract the (negative) values, i.e. add a small increment
	399	pt2.x -= rect.left; pt2.y -= rect.top;
	400	}
	401	else if (m_window && m_fullScreen)
	402	{
	403	pt2 = m_window->ClientToScreen(pt2);
	404	}
	405
	406	bool ret = (ImageList_DragMove( pt2.x, pt2.y ) != 0);
	407
	408	m_position = pt2;
	409
	410	return ret;
	411	}
	412
	413	bool wxDragImage::Show()
	414	{
	415	wxASSERT_MSG( (m_hImageList != 0), wxT("Image list must not be null in Show."));
	416
	417	HWND hWnd = 0;
	418	if (m_window && !m_fullScreen)
	419	hWnd = (HWND) m_window->GetHWND();
	420
	421	bool ret = (ImageList_DragEnter( hWnd, m_position.x, m_position.y ) != 0);
	422
	423	return ret;
	424	}
	425
	426	bool wxDragImage::Hide()
	427	{
	428	wxASSERT_MSG( (m_hImageList != 0), wxT("Image list must not be null in Hide."));
	429
	430	HWND hWnd = 0;
	431	if (m_window && !m_fullScreen)
	432	hWnd = (HWND) m_window->GetHWND();
	433
	434	bool ret = (ImageList_DragLeave( hWnd ) != 0);
	435
	436	return ret;
	437	}
	438
	439	#endif
	440	// __WIN95__
	441
	442	#endif // wxUSE_DRAGIMAGE