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

// ----------------------------------------------------------------------------
// 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::GetSystemFont(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);
    image.SetMaskColour(255, 255, 255);
    bitmap = image.ConvertToBitmap();

    return Create(bitmap, 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	// ----------------------------------------------------------------------------
	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	UINT flags = 0 ;
	114	if (image.GetDepth() <= 4)
	115	flags = ILC_COLOR4;
	116	else if (image.GetDepth() <= 8)
	117	flags = ILC_COLOR8;
	118	else if (image.GetDepth() <= 16)
	119	flags = ILC_COLOR16;
	120	else if (image.GetDepth() <= 24)
	121	flags = ILC_COLOR24;
	122	else
	123	flags = ILC_COLOR32;
	124
	125	bool mask = (image.GetMask() != 0);
	126	if ( mask )
	127	flags \|= ILC_MASK;
	128
	129	m_hImageList = (WXHIMAGELIST) ImageList_Create(image.GetWidth(), image.GetHeight(), flags, 1, 1);
	130
	131	int index;
	132	if (!mask)
	133	{
	134	HBITMAP hBitmap1 = (HBITMAP) image.GetHBITMAP();
	135	index = ImageList_Add(GetHimageList(), hBitmap1, 0);
	136	}
	137	else
	138	{
	139	HBITMAP hBitmap1 = (HBITMAP) image.GetHBITMAP();
	140	HBITMAP hBitmap2 = (HBITMAP) image.GetMask()->GetMaskBitmap();
	141	HBITMAP hbmpMask = wxInvertMask(hBitmap2);
	142
	143	index = ImageList_Add(GetHimageList(), hBitmap1, hbmpMask);
	144	::DeleteObject(hbmpMask);
	145	}
	146	if ( index == -1 )
	147	{
	148	wxLogError(_("Couldn't add an image to the image list."));
	149	}
	150	m_cursor = cursor; // Can only combine with drag image after calling BeginDrag.
	151
	152	return (index != -1) ;
	153	}
	154
	155	// Create a drag image from an icon and optional cursor
	156	bool wxDragImage::Create(const wxIcon& image, const wxCursor& cursor)
	157	{
	158	if ( m_hImageList )
	159	ImageList_Destroy(GetHimageList());
	160	m_hImageList = 0;
	161
	162	UINT flags = 0 ;
	163	if (image.GetDepth() <= 4)
	164	flags = ILC_COLOR4;
	165	else if (image.GetDepth() <= 8)
	166	flags = ILC_COLOR8;
	167	else if (image.GetDepth() <= 16)
	168	flags = ILC_COLOR16;
	169	else if (image.GetDepth() <= 24)
	170	flags = ILC_COLOR24;
	171	else
	172	flags = ILC_COLOR32;
	173	bool mask = TRUE;
	174	if ( mask )
	175	flags \|= ILC_MASK;
	176
	177	m_hImageList = (WXHIMAGELIST) ImageList_Create(image.GetWidth(), image.GetHeight(), flags, 1, 1);
	178
	179	HICON hIcon = (HICON) image.GetHICON();
	180
	181	int index = ImageList_AddIcon(GetHimageList(), hIcon);
	182	if ( index == -1 )
	183	{
	184	wxLogError(_("Couldn't add an image to the image list."));
	185	}
	186
	187	m_cursor = cursor; // Can only combine with drag image after calling BeginDrag.
	188
	189	return (index != -1) ;
	190	}
	191
	192	// Create a drag image from a string and optional cursor
	193	bool wxDragImage::Create(const wxString& str, const wxCursor& cursor)
	194	{
	195	wxFont font(wxSystemSettings::GetSystemFont(wxSYS_DEFAULT_GUI_FONT));
	196
	197	long w, h;
	198	wxScreenDC dc;
	199	dc.SetFont(font);
	200	dc.GetTextExtent(str, & w, & h);
	201	dc.SetFont(wxNullFont);
	202
	203	wxMemoryDC dc2;
	204	dc2.SetFont(font);
	205	wxBitmap bitmap((int) w+2, (int) h+2);
	206	dc2.SelectObject(bitmap);
	207
	208	dc2.SetBackground(* wxWHITE_BRUSH);
	209	dc2.Clear();
	210	dc2.SetBackgroundMode(wxTRANSPARENT);
	211	dc2.SetTextForeground(* wxLIGHT_GREY);
	212	dc2.DrawText(str, 0, 0);
	213	dc2.DrawText(str, 1, 0);
	214	dc2.DrawText(str, 2, 0);
	215	dc2.DrawText(str, 1, 1);
	216	dc2.DrawText(str, 2, 1);
	217	dc2.DrawText(str, 1, 2);
	218	dc2.DrawText(str, 2, 2);
	219	dc2.SetTextForeground(* wxBLACK);
	220	dc2.DrawText(str, 1, 1);
	221
	222	dc2.SelectObject(wxNullBitmap);
	223
	224	// Make the bitmap masked
	225	wxImage image(bitmap);
	226	image.SetMaskColour(255, 255, 255);
	227	bitmap = image.ConvertToBitmap();
	228
	229	return Create(bitmap, cursor);
	230	}
	231
	232	// Create a drag image for the given tree control item
	233	bool wxDragImage::Create(const wxTreeCtrl& treeCtrl, wxTreeItemId& id)
	234	{
	235	if ( m_hImageList )
	236	ImageList_Destroy(GetHimageList());
	237	m_hImageList = (WXHIMAGELIST) TreeView_CreateDragImage((HWND) treeCtrl.GetHWND(), (HTREEITEM) (WXHTREEITEM) id);
	238	return TRUE;
	239	}
	240
	241	// Create a drag image for the given list control item
	242	bool wxDragImage::Create(const wxListCtrl& listCtrl, long id)
	243	{
	244	if ( m_hImageList )
	245	ImageList_Destroy(GetHimageList());
	246	POINT pt;
	247	pt.x = 0; pt.y = 0;
	248	m_hImageList = (WXHIMAGELIST) ListView_CreateDragImage((HWND) listCtrl.GetHWND(), id, & pt);
	249	return TRUE;
	250	}
	251
	252	// Begin drag
	253	bool wxDragImage::BeginDrag(const wxPoint& hotspot, wxWindow* window, bool fullScreen, wxRect* rect)
	254	{
	255	wxASSERT_MSG( (m_hImageList != 0), wxT("Image list must not be null in BeginDrag."));
	256	wxASSERT_MSG( (window != 0), wxT("Window must not be null in BeginDrag."));
	257
	258	m_fullScreen = fullScreen;
	259	if (rect)
	260	m_boundingRect = * rect;
	261
	262	bool ret = (ImageList_BeginDrag(GetHimageList(), 0, hotspot.x, hotspot.y) != 0);
	263
	264	if (!ret)
	265	{
	266	wxFAIL_MSG( _T("BeginDrag failed.") );
	267
	268	return FALSE;
	269	}
	270
	271	if (m_cursor.Ok())
	272	{
	273	#if wxUSE_SIMPLER_DRAGIMAGE
	274	m_oldCursor = window->GetCursor();
	275	window->SetCursor(m_cursor);
	276	#else
	277	if (!m_hCursorImageList)
	278	{
	279	int cxCursor = GetSystemMetrics(SM_CXCURSOR);
	280	int cyCursor = GetSystemMetrics(SM_CYCURSOR);
	281
	282	m_hCursorImageList = (WXHIMAGELIST) ImageList_Create(cxCursor, cyCursor, ILC_MASK, 1, 1);
	283	}
	284
	285	// See if we can find the cursor hotspot
	286	wxPoint curHotSpot(hotspot);
	287
	288	// Although it seems to produce the right position, when the hotspot goeos
	289	// negative it has strange effects on the image.
	290	// How do we stop the cursor jumping right and below of where it should be?
	291	#if 0
	292	ICONINFO iconInfo;
	293	if (::GetIconInfo((HICON) (HCURSOR) m_cursor.GetHCURSOR(), & iconInfo) != 0)
	294	{
	295	curHotSpot.x -= iconInfo.xHotspot;
	296	curHotSpot.y -= iconInfo.yHotspot;
	297	}
	298	#endif
	299	//wxString msg;
	300	//msg.Printf("Hotspot = %d, %d", curHotSpot.x, curHotSpot.y);
	301	//wxLogDebug(msg);
	302
	303	// First add the cursor to the image list
	304	HCURSOR hCursor = (HCURSOR) m_cursor.GetHCURSOR();
	305	int cursorIndex = ImageList_AddIcon((HIMAGELIST) m_hCursorImageList, (HICON) hCursor);
	306
	307	wxASSERT_MSG( (cursorIndex != -1), wxT("ImageList_AddIcon failed in BeginDrag."));
	308
	309	if (cursorIndex != -1)
	310	{
	311	ImageList_SetDragCursorImage((HIMAGELIST) m_hCursorImageList, cursorIndex, curHotSpot.x, curHotSpot.y);
	312	}
	313	#endif
	314	}
	315
	316	#if !wxUSE_SIMPLER_DRAGIMAGE
	317	if (m_cursor.Ok())
	318	::ShowCursor(FALSE);
	319	#endif
	320
	321	m_window = window;
	322
	323	::SetCapture(GetHwndOf(window));
	324
	325	return TRUE;
	326	}
	327
	328	// Begin drag. hotspot is the location of the drag position relative to the upper-left
	329	// corner of the image. This is full screen only. fullScreenRect gives the
	330	// position of the window on the screen, to restrict the drag to.
	331	bool wxDragImage::BeginDrag(const wxPoint& hotspot, wxWindow* window, wxWindow* fullScreenRect)
	332	{
	333	wxRect rect;
	334
	335	int x = fullScreenRect->GetPosition().x;
	336	int y = fullScreenRect->GetPosition().y;
	337
	338	wxSize sz = fullScreenRect->GetSize();
	339
	340	if (fullScreenRect->GetParent() && !fullScreenRect->IsKindOf(CLASSINFO(wxFrame)))
	341	fullScreenRect->GetParent()->ClientToScreen(& x, & y);
	342
	343	rect.x = x; rect.y = y;
	344	rect.width = sz.x; rect.height = sz.y;
	345
	346	return BeginDrag(hotspot, window, TRUE, & rect);
	347	}
	348
	349	// End drag
	350	bool wxDragImage::EndDrag()
	351	{
	352	wxASSERT_MSG( (m_hImageList != 0), wxT("Image list must not be null in EndDrag."));
	353
	354	ImageList_EndDrag();
	355
	356	if ( !::ReleaseCapture() )
	357	{
	358	wxLogLastError(wxT("ReleaseCapture"));
	359	}
	360
	361	#if wxUSE_SIMPLER_DRAGIMAGE
	362	if (m_cursor.Ok() && m_oldCursor.Ok())
	363	m_window->SetCursor(m_oldCursor);
	364	#else
	365	::ShowCursor(TRUE);
	366	#endif
	367
	368	m_window = (wxWindow*) NULL;
	369
	370	return TRUE;
	371	}
	372
	373	// Move the image: call from OnMouseMove. Pt is in window client coordinates if window
	374	// is non-NULL, or in screen coordinates if NULL.
	375	bool wxDragImage::Move(const wxPoint& pt)
	376	{
	377	wxASSERT_MSG( (m_hImageList != 0), wxT("Image list must not be null in Move."));
	378
	379	// These are in window, not client coordinates.
	380	// So need to convert to client coordinates.
	381	wxPoint pt2(pt);
	382	if (m_window && !m_fullScreen)
	383	{
	384	RECT rect;
	385	rect.left = 0; rect.top = 0;
	386	rect.right = 0; rect.bottom = 0;
	387	DWORD style = ::GetWindowLong((HWND) m_window->GetHWND(), GWL_STYLE);
	388	#ifdef __WIN32__
	389	DWORD exStyle = ::GetWindowLong((HWND) m_window->GetHWND(), GWL_EXSTYLE);
	390	::AdjustWindowRectEx(& rect, style, FALSE, exStyle);
	391	#else
	392	::AdjustWindowRect(& rect, style, FALSE);
	393	#endif
	394	// Subtract the (negative) values, i.e. add a small increment
	395	pt2.x -= rect.left; pt2.y -= rect.top;
	396	}
	397	else if (m_window && m_fullScreen)
	398	{
	399	pt2 = m_window->ClientToScreen(pt2);
	400	}
	401
	402	bool ret = (ImageList_DragMove( pt2.x, pt2.y ) != 0);
	403
	404	m_position = pt2;
	405
	406	return ret;
	407	}
	408
	409	bool wxDragImage::Show()
	410	{
	411	wxASSERT_MSG( (m_hImageList != 0), wxT("Image list must not be null in Show."));
	412
	413	HWND hWnd = 0;
	414	if (m_window && !m_fullScreen)
	415	hWnd = (HWND) m_window->GetHWND();
	416
	417	bool ret = (ImageList_DragEnter( hWnd, m_position.x, m_position.y ) != 0);
	418
	419	return ret;
	420	}
	421
	422	bool wxDragImage::Hide()
	423	{
	424	wxASSERT_MSG( (m_hImageList != 0), wxT("Image list must not be null in Hide."));
	425
	426	HWND hWnd = 0;
	427	if (m_window && !m_fullScreen)
	428	hWnd = (HWND) m_window->GetHWND();
	429
	430	bool ret = (ImageList_DragLeave( hWnd ) != 0);
	431
	432	return ret;
	433	}
	434
	435	#endif
	436	// __WIN95__
	437
	438	#endif // wxUSE_DRAGIMAGE