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

    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));

    wxCoord 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(wxBRUSHSTYLE_TRANSPARENT);
    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
	186	flags \|= ILC_MASK;
	187
	188	m_hImageList = (WXHIMAGELIST) ImageList_Create(image.GetWidth(), image.GetHeight(), flags, 1, 1);
	189
	190	HICON hIcon = (HICON) image.GetHICON();
	191
	192	int index = ImageList_AddIcon(GetHimageList(), hIcon);
	193	if ( index == -1 )
	194	{
	195	wxLogError(_("Couldn't add an image to the image list."));
	196	}
	197
	198	m_cursor = cursor; // Can only combine with drag image after calling BeginDrag.
	199
	200	return (index != -1) ;
	201	}
	202
	203	// Create a drag image from a string and optional cursor
	204	bool wxDragImage::Create(const wxString& str, const wxCursor& cursor)
	205	{
	206	wxFont font(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
	207
	208	wxCoord w = 0, h = 0;
	209	wxScreenDC dc;
	210	dc.SetFont(font);
	211	dc.GetTextExtent(str, & w, & h);
	212	dc.SetFont(wxNullFont);
	213
	214	wxMemoryDC dc2;
	215	dc2.SetFont(font);
	216	wxBitmap bitmap((int) w+2, (int) h+2);
	217	dc2.SelectObject(bitmap);
	218
	219	dc2.SetBackground(* wxWHITE_BRUSH);
	220	dc2.Clear();
	221	dc2.SetBackgroundMode(wxBRUSHSTYLE_TRANSPARENT);
	222	dc2.SetTextForeground(* wxLIGHT_GREY);
	223	dc2.DrawText(str, 0, 0);
	224	dc2.DrawText(str, 1, 0);
	225	dc2.DrawText(str, 2, 0);
	226	dc2.DrawText(str, 1, 1);
	227	dc2.DrawText(str, 2, 1);
	228	dc2.DrawText(str, 1, 2);
	229	dc2.DrawText(str, 2, 2);
	230	dc2.SetTextForeground(* wxBLACK);
	231	dc2.DrawText(str, 1, 1);
	232
	233	dc2.SelectObject(wxNullBitmap);
	234
	235	#if wxUSE_WXDIB
	236	// Make the bitmap masked
	237	wxImage image = bitmap.ConvertToImage();
	238	image.SetMaskColour(255, 255, 255);
	239	return Create(wxBitmap(image), cursor);
	240	#else
	241	return false;
	242	#endif
	243	}
	244
	245	#if wxUSE_TREECTRL
	246	// Create a drag image for the given tree control item
	247	bool wxDragImage::Create(const wxTreeCtrl& treeCtrl, wxTreeItemId& id)
	248	{
	249	if ( m_hImageList )
	250	ImageList_Destroy(GetHimageList());
	251	m_hImageList = (WXHIMAGELIST)
	252	TreeView_CreateDragImage(GetHwndOf(&treeCtrl), (HTREEITEM) id.m_pItem);
	253	return m_hImageList != 0;
	254	}
	255	#endif
	256
	257	#if wxUSE_LISTCTRL
	258	// Create a drag image for the given list control item
	259	bool wxDragImage::Create(const wxListCtrl& listCtrl, long id)
	260	{
	261	if ( m_hImageList )
	262	ImageList_Destroy(GetHimageList());
	263	POINT pt;
	264	pt.x = 0; pt.y = 0;
	265	m_hImageList = (WXHIMAGELIST) ListView_CreateDragImage((HWND) listCtrl.GetHWND(), id, & pt);
	266	return true;
	267	}
	268	#endif
	269
	270	// Begin drag
	271	bool wxDragImage::BeginDrag(const wxPoint& hotspot, wxWindow* window, bool fullScreen, wxRect* rect)
	272	{
	273	wxASSERT_MSG( (m_hImageList != 0), wxT("Image list must not be null in BeginDrag."));
	274	wxASSERT_MSG( (window != 0), wxT("Window must not be null in BeginDrag."));
	275
	276	m_fullScreen = fullScreen;
	277	if (rect)
	278	m_boundingRect = * rect;
	279
	280	bool ret = (ImageList_BeginDrag(GetHimageList(), 0, hotspot.x, hotspot.y) != 0);
	281
	282	if (!ret)
	283	{
	284	wxFAIL_MSG( _T("BeginDrag failed.") );
	285
	286	return false;
	287	}
	288
	289	if (m_cursor.Ok())
	290	{
	291	#if wxUSE_SIMPLER_DRAGIMAGE
	292	m_oldCursor = window->GetCursor();
	293	window->SetCursor(m_cursor);
	294	#else
	295	if (!m_hCursorImageList)
	296	{
	297	#ifndef SM_CXCURSOR
	298	// Smartphone may not have these metric symbol
	299	int cxCursor = 16;
	300	int cyCursor = 16;
	301	#else
	302	int cxCursor = ::GetSystemMetrics(SM_CXCURSOR);
	303	int cyCursor = ::GetSystemMetrics(SM_CYCURSOR);
	304	#endif
	305	m_hCursorImageList = (WXHIMAGELIST) ImageList_Create(cxCursor, cyCursor, ILC_MASK, 1, 1);
	306	}
	307
	308	// See if we can find the cursor hotspot
	309	wxPoint curHotSpot(hotspot);
	310
	311	// Although it seems to produce the right position, when the hotspot goeos
	312	// negative it has strange effects on the image.
	313	// How do we stop the cursor jumping right and below of where it should be?
	314	#if 0
	315	ICONINFO iconInfo;
	316	if (::GetIconInfo((HICON) (HCURSOR) m_cursor.GetHCURSOR(), & iconInfo) != 0)
	317	{
	318	curHotSpot.x -= iconInfo.xHotspot;
	319	curHotSpot.y -= iconInfo.yHotspot;
	320	}
	321	#endif
	322	//wxString msg;
	323	//msg.Printf("Hotspot = %d, %d", curHotSpot.x, curHotSpot.y);
	324	//wxLogDebug(msg);
	325
	326	// First add the cursor to the image list
	327	HCURSOR hCursor = (HCURSOR) m_cursor.GetHCURSOR();
	328	int cursorIndex = ImageList_AddIcon((HIMAGELIST) m_hCursorImageList, (HICON) hCursor);
	329
	330	wxASSERT_MSG( (cursorIndex != -1), wxT("ImageList_AddIcon failed in BeginDrag."));
	331
	332	if (cursorIndex != -1)
	333	{
	334	ImageList_SetDragCursorImage((HIMAGELIST) m_hCursorImageList, cursorIndex, curHotSpot.x, curHotSpot.y);
	335	}
	336	#endif
	337	}
	338
	339	#if !wxUSE_SIMPLER_DRAGIMAGE
	340	if (m_cursor.Ok())
	341	::ShowCursor(FALSE);
	342	#endif
	343
	344	m_window = window;
	345
	346	::SetCapture(GetHwndOf(window));
	347
	348	return true;
	349	}
	350
	351	// Begin drag. hotspot is the location of the drag position relative to the upper-left
	352	// corner of the image. This is full screen only. fullScreenRect gives the
	353	// position of the window on the screen, to restrict the drag to.
	354	bool wxDragImage::BeginDrag(const wxPoint& hotspot, wxWindow* window, wxWindow* fullScreenRect)
	355	{
	356	wxRect rect;
	357
	358	int x = fullScreenRect->GetPosition().x;
	359	int y = fullScreenRect->GetPosition().y;
	360
	361	wxSize sz = fullScreenRect->GetSize();
	362
	363	if (fullScreenRect->GetParent() && !fullScreenRect->IsKindOf(CLASSINFO(wxFrame)))
	364	fullScreenRect->GetParent()->ClientToScreen(& x, & y);
	365
	366	rect.x = x; rect.y = y;
	367	rect.width = sz.x; rect.height = sz.y;
	368
	369	return BeginDrag(hotspot, window, true, & rect);
	370	}
	371
	372	// End drag
	373	bool wxDragImage::EndDrag()
	374	{
	375	wxASSERT_MSG( (m_hImageList != 0), wxT("Image list must not be null in EndDrag."));
	376
	377	ImageList_EndDrag();
	378
	379	if ( !::ReleaseCapture() )
	380	{
	381	wxLogLastError(wxT("ReleaseCapture"));
	382	}
	383
	384	#if wxUSE_SIMPLER_DRAGIMAGE
	385	if (m_cursor.Ok() && m_oldCursor.Ok())
	386	m_window->SetCursor(m_oldCursor);
	387	#else
	388	::ShowCursor(TRUE);
	389	#endif
	390
	391	m_window = (wxWindow*) NULL;
	392
	393	return true;
	394	}
	395
	396	// Move the image: call from OnMouseMove. Pt is in window client coordinates if window
	397	// is non-NULL, or in screen coordinates if NULL.
	398	bool wxDragImage::Move(const wxPoint& pt)
	399	{
	400	wxASSERT_MSG( (m_hImageList != 0), wxT("Image list must not be null in Move."));
	401
	402	// These are in window, not client coordinates.
	403	// So need to convert to client coordinates.
	404	wxPoint pt2(pt);
	405	if (m_window && !m_fullScreen)
	406	{
	407	RECT rect;
	408	rect.left = 0; rect.top = 0;
	409	rect.right = 0; rect.bottom = 0;
	410	DWORD style = ::GetWindowLong((HWND) m_window->GetHWND(), GWL_STYLE);
	411	#ifdef __WIN32__
	412	DWORD exStyle = ::GetWindowLong((HWND) m_window->GetHWND(), GWL_EXSTYLE);
	413	::AdjustWindowRectEx(& rect, style, FALSE, exStyle);
	414	#else
	415	::AdjustWindowRect(& rect, style, FALSE);
	416	#endif
	417	// Subtract the (negative) values, i.e. add a small increment
	418	pt2.x -= rect.left; pt2.y -= rect.top;
	419	}
	420	else if (m_window && m_fullScreen)
	421	{
	422	pt2 = m_window->ClientToScreen(pt2);
	423	}
	424
	425	bool ret = (ImageList_DragMove( pt2.x, pt2.y ) != 0);
	426
	427	m_position = pt2;
	428
	429	return ret;
	430	}
	431
	432	bool wxDragImage::Show()
	433	{
	434	wxASSERT_MSG( (m_hImageList != 0), wxT("Image list must not be null in Show."));
	435
	436	HWND hWnd = 0;
	437	if (m_window && !m_fullScreen)
	438	hWnd = (HWND) m_window->GetHWND();
	439
	440	bool ret = (ImageList_DragEnter( hWnd, m_position.x, m_position.y ) != 0);
	441
	442	return ret;
	443	}
	444
	445	bool wxDragImage::Hide()
	446	{
	447	wxASSERT_MSG( (m_hImageList != 0), wxT("Image list must not be null in Hide."));
	448
	449	HWND hWnd = 0;
	450	if (m_window && !m_fullScreen)
	451	hWnd = (HWND) m_window->GetHWND();
	452
	453	bool ret = (ImageList_DragLeave( hWnd ) != 0);
	454
	455	return ret;
	456	}
	457
	458	#endif // wxUSE_DRAGIMAGE