src/gtk/cursor.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        src/gtk/cursor.cpp
// Purpose:     wxCursor implementation
// Author:      Robert Roebling
// Id:          $Id$
// Copyright:   (c) 1998 Robert Roebling
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

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

#include "wx/cursor.h"

#ifndef WX_PRECOMP
    #include "wx/window.h"
    #include "wx/app.h"
    #include "wx/image.h"
    #include "wx/bitmap.h"
    #include "wx/log.h"
#endif // WX_PRECOMP

#include <gtk/gtk.h>
#include "wx/gtk/private/object.h"
#include "wx/gtk/private/gtk2-compat.h"

//-----------------------------------------------------------------------------
// wxCursorRefData
//-----------------------------------------------------------------------------

class wxCursorRefData: public wxGDIRefData
{
public:
    wxCursorRefData();
    virtual ~wxCursorRefData();

    virtual bool IsOk() const { return m_cursor != NULL; }

    GdkCursor *m_cursor;

private:
    // There is no way to copy m_cursor so we can't implement a copy ctor
    // properly.
    wxDECLARE_NO_COPY_CLASS(wxCursorRefData);
};

wxCursorRefData::wxCursorRefData()
{
    m_cursor = NULL;
}

wxCursorRefData::~wxCursorRefData()
{
    if (m_cursor) gdk_cursor_unref( m_cursor );
}


//-----------------------------------------------------------------------------
// wxCursor
//-----------------------------------------------------------------------------

#define M_CURSORDATA static_cast<wxCursorRefData*>(m_refData)

IMPLEMENT_DYNAMIC_CLASS(wxCursor, wxGDIObject)

// used in the following two ctors
extern GtkWidget *wxGetRootWindow();


wxCursor::wxCursor()
{
}

#if wxUSE_IMAGE
wxCursor::wxCursor(const wxString& cursor_file,
                   wxBitmapType type,
                   int hotSpotX, int hotSpotY)
{
    wxImage img;
    if (!img.LoadFile(cursor_file, type))
        return;

    // eventually set the hotspot:
    if (!img.HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_X))
        img.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_X, hotSpotX);
    if (!img.HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y))
        img.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y, hotSpotY);

    InitFromImage(img);
}

wxCursor::wxCursor(const wxImage& img)
{
    InitFromImage(img);
}
#endif

wxCursor::wxCursor(const char bits[], int width, int height,
                   int hotSpotX, int hotSpotY,
                   const char maskBits[], const wxColour *fg, const wxColour *bg)
{
    if (!maskBits)
        maskBits = bits;
    if (!fg)
        fg = wxBLACK;
    if (!bg)
        bg = wxWHITE;
    if (hotSpotX < 0 || hotSpotX >= width)
        hotSpotX = 0;
    if (hotSpotY < 0 || hotSpotY >= height)
        hotSpotY = 0;

    GdkBitmap* data = gdk_bitmap_create_from_data(
        gtk_widget_get_window(wxGetRootWindow()), const_cast<char*>(bits), width, height);
    GdkBitmap* mask = gdk_bitmap_create_from_data(
        gtk_widget_get_window(wxGetRootWindow()), const_cast<char*>(maskBits), width, height);

    m_refData = new wxCursorRefData;
    M_CURSORDATA->m_cursor = gdk_cursor_new_from_pixmap(
                 data, mask, fg->GetColor(), bg->GetColor(),
                 hotSpotX, hotSpotY );

    g_object_unref (data);
    g_object_unref (mask);
}

wxCursor::~wxCursor()
{
}

void wxCursor::InitFromStock( wxStockCursor cursorId )
{
    m_refData = new wxCursorRefData();

    GdkCursorType gdk_cur = GDK_LEFT_PTR;
    switch (cursorId)
    {
        case wxCURSOR_BLANK:
            {
                const char bits[] = { 0 };
                const GdkColor color = { 0, 0, 0, 0 };

                GdkPixmap *pixmap = gdk_bitmap_create_from_data(NULL, bits, 1, 1);
                M_CURSORDATA->m_cursor = gdk_cursor_new_from_pixmap(pixmap,
                                                                    pixmap,
                                                                    &color,
                                                                    &color,
                                                                    0, 0);
                g_object_unref(pixmap);
            }
            return;

        case wxCURSOR_ARROW:            // fall through to default
        case wxCURSOR_DEFAULT:          gdk_cur = GDK_LEFT_PTR; break;
        case wxCURSOR_RIGHT_ARROW:      gdk_cur = GDK_RIGHT_PTR; break;
        case wxCURSOR_HAND:             gdk_cur = GDK_HAND2; break;
        case wxCURSOR_CROSS:            gdk_cur = GDK_CROSSHAIR; break;
        case wxCURSOR_SIZEWE:           gdk_cur = GDK_SB_H_DOUBLE_ARROW; break;
        case wxCURSOR_SIZENS:           gdk_cur = GDK_SB_V_DOUBLE_ARROW; break;
        case wxCURSOR_ARROWWAIT:
        case wxCURSOR_WAIT:
        case wxCURSOR_WATCH:            gdk_cur = GDK_WATCH; break;
        case wxCURSOR_SIZING:           gdk_cur = GDK_SIZING; break;
        case wxCURSOR_SPRAYCAN:         gdk_cur = GDK_SPRAYCAN; break;
        case wxCURSOR_IBEAM:            gdk_cur = GDK_XTERM; break;
        case wxCURSOR_PENCIL:           gdk_cur = GDK_PENCIL; break;
        case wxCURSOR_NO_ENTRY:         gdk_cur = GDK_PIRATE; break;
        case wxCURSOR_SIZENWSE:
        case wxCURSOR_SIZENESW:         gdk_cur = GDK_FLEUR; break;
        case wxCURSOR_QUESTION_ARROW:   gdk_cur = GDK_QUESTION_ARROW; break;
        case wxCURSOR_PAINT_BRUSH:      gdk_cur = GDK_SPRAYCAN; break;
        case wxCURSOR_MAGNIFIER:        gdk_cur = GDK_PLUS; break;
        case wxCURSOR_CHAR:             gdk_cur = GDK_XTERM; break;
        case wxCURSOR_LEFT_BUTTON:      gdk_cur = GDK_LEFTBUTTON; break;
        case wxCURSOR_MIDDLE_BUTTON:    gdk_cur = GDK_MIDDLEBUTTON; break;
        case wxCURSOR_RIGHT_BUTTON:     gdk_cur = GDK_RIGHTBUTTON; break;
        case wxCURSOR_BULLSEYE:         gdk_cur = GDK_TARGET; break;

        case wxCURSOR_POINT_LEFT:       gdk_cur = GDK_SB_LEFT_ARROW; break;
        case wxCURSOR_POINT_RIGHT:      gdk_cur = GDK_SB_RIGHT_ARROW; break;
/*
        case wxCURSOR_DOUBLE_ARROW:     gdk_cur = GDK_DOUBLE_ARROW; break;
        case wxCURSOR_CROSS_REVERSE:    gdk_cur = GDK_CROSS_REVERSE; break;
        case wxCURSOR_BASED_ARROW_UP:   gdk_cur = GDK_BASED_ARROW_UP; break;
        case wxCURSOR_BASED_ARROW_DOWN: gdk_cur = GDK_BASED_ARROW_DOWN; break;
*/

        default:
            wxFAIL_MSG(wxT("unsupported cursor type"));
            // will use the standard one
            break;
    }

    M_CURSORDATA->m_cursor = gdk_cursor_new( gdk_cur );
}

#if wxUSE_IMAGE

static void GetHotSpot(const wxImage& image, int& x, int& y)
{
    if (image.HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_X))
        x = image.GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_X);
    else
        x = 0;

    if (image.HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y))
        y = image.GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_Y);
    else
        y = 0;

    if (x < 0 || x >= image.GetWidth())
        x = 0;
    if (y < 0 || y >= image.GetHeight())
        y = 0;
}

void wxCursor::InitFromImage( const wxImage & image )
{
    int w = image.GetWidth() ;
    int h = image.GetHeight();
    bool bHasMask = image.HasMask();
    int hotSpotX, hotSpotY;
    GetHotSpot(image, hotSpotX, hotSpotY);
    m_refData = new wxCursorRefData;
    wxImage image_copy(image);

    GdkDisplay* display = gdk_drawable_get_display(gtk_widget_get_window(wxGetRootWindow()));
    if (gdk_display_supports_cursor_color(display))
    {
        if (!image.HasAlpha())
        {
            // add alpha, so wxBitmap will convert to pixbuf format
            image_copy.InitAlpha();
        }
        wxBitmap bitmap(image_copy);
        wxASSERT(bitmap.HasPixbuf());
        M_CURSORDATA->m_cursor = gdk_cursor_new_from_pixbuf
                             (
                              display,
                              bitmap.GetPixbuf(),
                              hotSpotX, hotSpotY
                             );
    }
    else // no colour cursor support
    {
        unsigned long keyMaskColor = 0;
        GdkPixmap *maskRaw;
        if (bHasMask)
        {
            keyMaskColor = wxImageHistogram::MakeKey(
                image.GetMaskRed(), image.GetMaskGreen(), image.GetMaskBlue());
            // get mask before image is modified
            wxBitmap bitmap(image, 1);
            maskRaw = bitmap.GetMask()->GetBitmap();
            g_object_ref(maskRaw);
        }
        else
        {
            const int size = ((w + 7) / 8) * h;
            char* bits = new char[size];
            memset(bits, 0xff, size);
            maskRaw = gdk_bitmap_create_from_data(
                gtk_widget_get_window(wxGetRootWindow()), bits, w, h);
            delete[] bits;
        }

        // assign the raw pointer to wxGtkObject to ensure it is unref'd later
        wxGtkObject<GdkPixmap> mask(maskRaw);

        // modify image so wxBitmap can be used to convert to pixmap
        image_copy.SetMask(false);
        wxByte* data = image_copy.GetData();
        for (int j = 0; j < h; j++)
        {
            for (int i = 0; i < w; i++, data += 3)
            {
                // if average value of the pixel is > mid grey, convert it to
                // background (0), otherwise to foreground (255, using wxBitmap
                // convention)
                data[0] =
                data[1] =
                data[2] = int(data[0]) + data[1] + data[2] >= 3 * 128 ? 0 : 255;
            }
        }
        wxBitmap bitmap(image_copy, 1);

        // find the most frequent color(s)
        wxImageHistogram histogram;
        image.ComputeHistogram(histogram);

        long colMostFreq = 0;
        unsigned long nMost = 0;
        long colNextMostFreq = 0;
        unsigned long nNext = 0;
        for ( wxImageHistogram::iterator entry = histogram.begin();
              entry != histogram.end();
              ++entry )
        {
            unsigned long key = entry->first;
            if ( !bHasMask || (key != keyMaskColor) )
            {
                unsigned long value = entry->second.value;
                if (value > nMost)
                {
                    nNext = nMost;
                    colNextMostFreq = colMostFreq;
                    nMost = value;
                    colMostFreq = key;
                }
                else if (value > nNext)
                {
                    nNext = value;
                    colNextMostFreq = key;
                }
            }
        }

        wxColour fg = wxColour ( (unsigned char)(colMostFreq >> 16),
                                 (unsigned char)(colMostFreq >> 8),
                                 (unsigned char)(colMostFreq) );

        wxColour bg = wxColour ( (unsigned char)(colNextMostFreq >> 16),
                                 (unsigned char)(colNextMostFreq >> 8),
                                 (unsigned char)(colNextMostFreq) );

        int fg_intensity = fg.Red() + fg.Green() + fg.Blue();
        int bg_intensity = bg.Red() + bg.Green() + bg.Blue();

        if (bg_intensity > fg_intensity)
        {
            //swap fg and bg
            wxColour tmp = fg;
            fg = bg;
            bg = tmp;
        }

        M_CURSORDATA->m_cursor = gdk_cursor_new_from_pixmap
                                 (
                                    bitmap.GetPixmap(),
                                    mask,
                                    fg.GetColor(), bg.GetColor(),
                                    hotSpotX, hotSpotY
                                 );
    }
}

#endif // wxUSE_IMAGE

GdkCursor *wxCursor::GetCursor() const
{
    return M_CURSORDATA->m_cursor;
}

wxGDIRefData *wxCursor::CreateGDIRefData() const
{
    return new wxCursorRefData;
}

wxGDIRefData *
wxCursor::CloneGDIRefData(const wxGDIRefData * WXUNUSED(data)) const
{
    // TODO: We can't clone GDK cursors at the moment. To do this we'd need
    //       to remember the original data from which the cursor was created
    //       (i.e. standard cursor type or the bitmap) or use
    //       gdk_cursor_get_cursor_type() (which is in 2.22+ only) and
    //       gdk_cursor_get_image().
    wxFAIL_MSG( wxS("Cloning cursors is not implemented in wxGTK.") );

    return new wxCursorRefData;
}

//-----------------------------------------------------------------------------
// busy cursor routines
//-----------------------------------------------------------------------------

/* Current cursor, in order to hang on to
 * cursor handle when setting the cursor globally */
wxCursor g_globalCursor;

static wxCursor  gs_savedCursor;
static int       gs_busyCount = 0;

const wxCursor &wxBusyCursor::GetStoredCursor()
{
    return gs_savedCursor;
}

const wxCursor wxBusyCursor::GetBusyCursor()
{
    return wxCursor(wxCURSOR_WATCH);
}

static void UpdateCursors(GdkDisplay** display)
{
    wxWindowList::const_iterator i = wxTopLevelWindows.begin();
    for (size_t n = wxTopLevelWindows.size(); n--; ++i)
    {
        wxWindow* win = *i;
        win->GTKUpdateCursor();
        if (display && *display == NULL && win->m_widget)
            *display = gtk_widget_get_display(win->m_widget);
    }
}

void wxEndBusyCursor()
{
    if (--gs_busyCount > 0)
        return;

    g_globalCursor = gs_savedCursor;
    gs_savedCursor = wxNullCursor;
    UpdateCursors(NULL);
}

void wxBeginBusyCursor(const wxCursor* cursor)
{
    if (gs_busyCount++ > 0)
        return;

    wxASSERT_MSG( !gs_savedCursor.IsOk(),
                  wxT("forgot to call wxEndBusyCursor, will leak memory") );

    gs_savedCursor = g_globalCursor;
    g_globalCursor = *cursor;
    GdkDisplay* display = NULL;
    UpdateCursors(&display);
    if (display)
        gdk_display_flush(display);
}

bool wxIsBusy()
{
    return gs_busyCount > 0;
}

void wxSetCursor( const wxCursor& cursor )
{
    g_globalCursor = cursor;
    UpdateCursors(NULL);
}
Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: src/gtk/cursor.cpp
	3	// Purpose: wxCursor implementation
	4	// Author: Robert Roebling
	5	// Id: $Id$
	6	// Copyright: (c) 1998 Robert Roebling
	7	// Licence: wxWindows licence
	8	/////////////////////////////////////////////////////////////////////////////
	9
	10	// For compilers that support precompilation, includes "wx.h".
	11	#include "wx/wxprec.h"
	12
	13	#include "wx/cursor.h"
	14
	15	#ifndef WX_PRECOMP
	16	#include "wx/window.h"
	17	#include "wx/app.h"
	18	#include "wx/image.h"
	19	#include "wx/bitmap.h"
	20	#include "wx/log.h"
	21	#endif // WX_PRECOMP
	22
	23	#include <gtk/gtk.h>
	24	#include "wx/gtk/private/object.h"
	25	#include "wx/gtk/private/gtk2-compat.h"
	26
	27	//-----------------------------------------------------------------------------
	28	// wxCursorRefData
	29	//-----------------------------------------------------------------------------
	30
	31	class wxCursorRefData: public wxGDIRefData
	32	{
	33	public:
	34	wxCursorRefData();
	35	virtual ~wxCursorRefData();
	36
	37	virtual bool IsOk() const { return m_cursor != NULL; }
	38
	39	GdkCursor *m_cursor;
	40
	41	private:
	42	// There is no way to copy m_cursor so we can't implement a copy ctor
	43	// properly.
	44	wxDECLARE_NO_COPY_CLASS(wxCursorRefData);
	45	};
	46
	47	wxCursorRefData::wxCursorRefData()
	48	{
	49	m_cursor = NULL;
	50	}
	51
	52	wxCursorRefData::~wxCursorRefData()
	53	{
	54	if (m_cursor) gdk_cursor_unref( m_cursor );
	55	}
	56
	57
	58	//-----------------------------------------------------------------------------
	59	// wxCursor
	60	//-----------------------------------------------------------------------------
	61
	62	#define M_CURSORDATA static_cast<wxCursorRefData*>(m_refData)
	63
	64	IMPLEMENT_DYNAMIC_CLASS(wxCursor, wxGDIObject)
	65
	66	// used in the following two ctors
	67	extern GtkWidget *wxGetRootWindow();
	68
	69
	70	wxCursor::wxCursor()
	71	{
	72	}
	73
	74	#if wxUSE_IMAGE
	75	wxCursor::wxCursor(const wxString& cursor_file,
	76	wxBitmapType type,
	77	int hotSpotX, int hotSpotY)
	78	{
	79	wxImage img;
	80	if (!img.LoadFile(cursor_file, type))
	81	return;
	82
	83	// eventually set the hotspot:
	84	if (!img.HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_X))
	85	img.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_X, hotSpotX);
	86	if (!img.HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y))
	87	img.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y, hotSpotY);
	88
	89	InitFromImage(img);
	90	}
	91
	92	wxCursor::wxCursor(const wxImage& img)
	93	{
	94	InitFromImage(img);
	95	}
	96	#endif
	97
	98	wxCursor::wxCursor(const char bits[], int width, int height,
	99	int hotSpotX, int hotSpotY,
	100	const char maskBits[], const wxColour fg, const wxColour bg)
	101	{
	102	if (!maskBits)
	103	maskBits = bits;
	104	if (!fg)
	105	fg = wxBLACK;
	106	if (!bg)
	107	bg = wxWHITE;
	108	if (hotSpotX < 0 \|\| hotSpotX >= width)
	109	hotSpotX = 0;
	110	if (hotSpotY < 0 \|\| hotSpotY >= height)
	111	hotSpotY = 0;
	112
	113	GdkBitmap* data = gdk_bitmap_create_from_data(
	114	gtk_widget_get_window(wxGetRootWindow()), const_cast<char*>(bits), width, height);
	115	GdkBitmap* mask = gdk_bitmap_create_from_data(
	116	gtk_widget_get_window(wxGetRootWindow()), const_cast<char*>(maskBits), width, height);
	117
	118	m_refData = new wxCursorRefData;
	119	M_CURSORDATA->m_cursor = gdk_cursor_new_from_pixmap(
	120	data, mask, fg->GetColor(), bg->GetColor(),
	121	hotSpotX, hotSpotY );
	122
	123	g_object_unref (data);
	124	g_object_unref (mask);
	125	}
	126
	127	wxCursor::~wxCursor()
	128	{
	129	}
	130
	131	void wxCursor::InitFromStock( wxStockCursor cursorId )
	132	{
	133	m_refData = new wxCursorRefData();
	134
	135	GdkCursorType gdk_cur = GDK_LEFT_PTR;
	136	switch (cursorId)
	137	{
	138	case wxCURSOR_BLANK:
	139	{
	140	const char bits[] = { 0 };
	141	const GdkColor color = { 0, 0, 0, 0 };
	142
	143	GdkPixmap *pixmap = gdk_bitmap_create_from_data(NULL, bits, 1, 1);
	144	M_CURSORDATA->m_cursor = gdk_cursor_new_from_pixmap(pixmap,
	145	pixmap,
	146	&color,
	147	&color,
	148	0, 0);
	149	g_object_unref(pixmap);
	150	}
	151	return;
	152
	153	case wxCURSOR_ARROW: // fall through to default
	154	case wxCURSOR_DEFAULT: gdk_cur = GDK_LEFT_PTR; break;
	155	case wxCURSOR_RIGHT_ARROW: gdk_cur = GDK_RIGHT_PTR; break;
	156	case wxCURSOR_HAND: gdk_cur = GDK_HAND2; break;
	157	case wxCURSOR_CROSS: gdk_cur = GDK_CROSSHAIR; break;
	158	case wxCURSOR_SIZEWE: gdk_cur = GDK_SB_H_DOUBLE_ARROW; break;
	159	case wxCURSOR_SIZENS: gdk_cur = GDK_SB_V_DOUBLE_ARROW; break;
	160	case wxCURSOR_ARROWWAIT:
	161	case wxCURSOR_WAIT:
	162	case wxCURSOR_WATCH: gdk_cur = GDK_WATCH; break;
	163	case wxCURSOR_SIZING: gdk_cur = GDK_SIZING; break;
	164	case wxCURSOR_SPRAYCAN: gdk_cur = GDK_SPRAYCAN; break;
	165	case wxCURSOR_IBEAM: gdk_cur = GDK_XTERM; break;
	166	case wxCURSOR_PENCIL: gdk_cur = GDK_PENCIL; break;
	167	case wxCURSOR_NO_ENTRY: gdk_cur = GDK_PIRATE; break;
	168	case wxCURSOR_SIZENWSE:
	169	case wxCURSOR_SIZENESW: gdk_cur = GDK_FLEUR; break;
	170	case wxCURSOR_QUESTION_ARROW: gdk_cur = GDK_QUESTION_ARROW; break;
	171	case wxCURSOR_PAINT_BRUSH: gdk_cur = GDK_SPRAYCAN; break;
	172	case wxCURSOR_MAGNIFIER: gdk_cur = GDK_PLUS; break;
	173	case wxCURSOR_CHAR: gdk_cur = GDK_XTERM; break;
	174	case wxCURSOR_LEFT_BUTTON: gdk_cur = GDK_LEFTBUTTON; break;
	175	case wxCURSOR_MIDDLE_BUTTON: gdk_cur = GDK_MIDDLEBUTTON; break;
	176	case wxCURSOR_RIGHT_BUTTON: gdk_cur = GDK_RIGHTBUTTON; break;
	177	case wxCURSOR_BULLSEYE: gdk_cur = GDK_TARGET; break;
	178
	179	case wxCURSOR_POINT_LEFT: gdk_cur = GDK_SB_LEFT_ARROW; break;
	180	case wxCURSOR_POINT_RIGHT: gdk_cur = GDK_SB_RIGHT_ARROW; break;
	181	/*
	182	case wxCURSOR_DOUBLE_ARROW: gdk_cur = GDK_DOUBLE_ARROW; break;
	183	case wxCURSOR_CROSS_REVERSE: gdk_cur = GDK_CROSS_REVERSE; break;
	184	case wxCURSOR_BASED_ARROW_UP: gdk_cur = GDK_BASED_ARROW_UP; break;
	185	case wxCURSOR_BASED_ARROW_DOWN: gdk_cur = GDK_BASED_ARROW_DOWN; break;
	186	*/
	187
	188	default:
	189	wxFAIL_MSG(wxT("unsupported cursor type"));
	190	// will use the standard one
	191	break;
	192	}
	193
	194	M_CURSORDATA->m_cursor = gdk_cursor_new( gdk_cur );
	195	}
	196
	197	#if wxUSE_IMAGE
	198
	199	static void GetHotSpot(const wxImage& image, int& x, int& y)
	200	{
	201	if (image.HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_X))
	202	x = image.GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_X);
	203	else
	204	x = 0;
	205
	206	if (image.HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y))
	207	y = image.GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_Y);
	208	else
	209	y = 0;
	210
	211	if (x < 0 \|\| x >= image.GetWidth())
	212	x = 0;
	213	if (y < 0 \|\| y >= image.GetHeight())
	214	y = 0;
	215	}
	216
	217	void wxCursor::InitFromImage( const wxImage & image )
	218	{
	219	int w = image.GetWidth() ;
	220	int h = image.GetHeight();
	221	bool bHasMask = image.HasMask();
	222	int hotSpotX, hotSpotY;
	223	GetHotSpot(image, hotSpotX, hotSpotY);
	224	m_refData = new wxCursorRefData;
	225	wxImage image_copy(image);
	226
	227	GdkDisplay* display = gdk_drawable_get_display(gtk_widget_get_window(wxGetRootWindow()));
	228	if (gdk_display_supports_cursor_color(display))
	229	{
	230	if (!image.HasAlpha())
	231	{
	232	// add alpha, so wxBitmap will convert to pixbuf format
	233	image_copy.InitAlpha();
	234	}
	235	wxBitmap bitmap(image_copy);
	236	wxASSERT(bitmap.HasPixbuf());
	237	M_CURSORDATA->m_cursor = gdk_cursor_new_from_pixbuf
	238	(
	239	display,
	240	bitmap.GetPixbuf(),
	241	hotSpotX, hotSpotY
	242	);
	243	}
	244	else // no colour cursor support
	245	{
	246	unsigned long keyMaskColor = 0;
	247	GdkPixmap *maskRaw;
	248	if (bHasMask)
	249	{
	250	keyMaskColor = wxImageHistogram::MakeKey(
	251	image.GetMaskRed(), image.GetMaskGreen(), image.GetMaskBlue());
	252	// get mask before image is modified
	253	wxBitmap bitmap(image, 1);
	254	maskRaw = bitmap.GetMask()->GetBitmap();
	255	g_object_ref(maskRaw);
	256	}
	257	else
	258	{
	259	const int size = ((w + 7) / 8) * h;
	260	char* bits = new char[size];
	261	memset(bits, 0xff, size);
	262	maskRaw = gdk_bitmap_create_from_data(
	263	gtk_widget_get_window(wxGetRootWindow()), bits, w, h);
	264	delete[] bits;
	265	}
	266
	267	// assign the raw pointer to wxGtkObject to ensure it is unref'd later
	268	wxGtkObject<GdkPixmap> mask(maskRaw);
	269
	270	// modify image so wxBitmap can be used to convert to pixmap
	271	image_copy.SetMask(false);
	272	wxByte* data = image_copy.GetData();
	273	for (int j = 0; j < h; j++)
	274	{
	275	for (int i = 0; i < w; i++, data += 3)
	276	{
	277	// if average value of the pixel is > mid grey, convert it to
	278	// background (0), otherwise to foreground (255, using wxBitmap
	279	// convention)
	280	data[0] =
	281	data[1] =
	282	data[2] = int(data[0]) + data[1] + data[2] >= 3 * 128 ? 0 : 255;
	283	}
	284	}
	285	wxBitmap bitmap(image_copy, 1);
	286
	287	// find the most frequent color(s)
	288	wxImageHistogram histogram;
	289	image.ComputeHistogram(histogram);
	290
	291	long colMostFreq = 0;
	292	unsigned long nMost = 0;
	293	long colNextMostFreq = 0;
	294	unsigned long nNext = 0;
	295	for ( wxImageHistogram::iterator entry = histogram.begin();
	296	entry != histogram.end();
	297	++entry )
	298	{
	299	unsigned long key = entry->first;
	300	if ( !bHasMask \|\| (key != keyMaskColor) )
	301	{
	302	unsigned long value = entry->second.value;
	303	if (value > nMost)
	304	{
	305	nNext = nMost;
	306	colNextMostFreq = colMostFreq;
	307	nMost = value;
	308	colMostFreq = key;
	309	}
	310	else if (value > nNext)
	311	{
	312	nNext = value;
	313	colNextMostFreq = key;
	314	}
	315	}
	316	}
	317
	318	wxColour fg = wxColour ( (unsigned char)(colMostFreq >> 16),
	319	(unsigned char)(colMostFreq >> 8),
	320	(unsigned char)(colMostFreq) );
	321
	322	wxColour bg = wxColour ( (unsigned char)(colNextMostFreq >> 16),
	323	(unsigned char)(colNextMostFreq >> 8),
	324	(unsigned char)(colNextMostFreq) );
	325
	326	int fg_intensity = fg.Red() + fg.Green() + fg.Blue();
	327	int bg_intensity = bg.Red() + bg.Green() + bg.Blue();
	328
	329	if (bg_intensity > fg_intensity)
	330	{
	331	//swap fg and bg
	332	wxColour tmp = fg;
	333	fg = bg;
	334	bg = tmp;
	335	}
	336
	337	M_CURSORDATA->m_cursor = gdk_cursor_new_from_pixmap
	338	(
	339	bitmap.GetPixmap(),
	340	mask,
	341	fg.GetColor(), bg.GetColor(),
	342	hotSpotX, hotSpotY
	343	);
	344	}
	345	}
	346
	347	#endif // wxUSE_IMAGE
	348
	349	GdkCursor *wxCursor::GetCursor() const
	350	{
	351	return M_CURSORDATA->m_cursor;
	352	}
	353
	354	wxGDIRefData *wxCursor::CreateGDIRefData() const
	355	{
	356	return new wxCursorRefData;
	357	}
	358
	359	wxGDIRefData *
	360	wxCursor::CloneGDIRefData(const wxGDIRefData * WXUNUSED(data)) const
	361	{
	362	// TODO: We can't clone GDK cursors at the moment. To do this we'd need
	363	// to remember the original data from which the cursor was created
	364	// (i.e. standard cursor type or the bitmap) or use
	365	// gdk_cursor_get_cursor_type() (which is in 2.22+ only) and
	366	// gdk_cursor_get_image().
	367	wxFAIL_MSG( wxS("Cloning cursors is not implemented in wxGTK.") );
	368
	369	return new wxCursorRefData;
	370	}
	371
	372	//-----------------------------------------------------------------------------
	373	// busy cursor routines
	374	//-----------------------------------------------------------------------------
	375
	376	/* Current cursor, in order to hang on to
	377	* cursor handle when setting the cursor globally */
	378	wxCursor g_globalCursor;
	379
	380	static wxCursor gs_savedCursor;
	381	static int gs_busyCount = 0;
	382
	383	const wxCursor &wxBusyCursor::GetStoredCursor()
	384	{
	385	return gs_savedCursor;
	386	}
	387
	388	const wxCursor wxBusyCursor::GetBusyCursor()
	389	{
	390	return wxCursor(wxCURSOR_WATCH);
	391	}
	392
	393	static void UpdateCursors(GdkDisplay** display)
	394	{
	395	wxWindowList::const_iterator i = wxTopLevelWindows.begin();
	396	for (size_t n = wxTopLevelWindows.size(); n--; ++i)
	397	{
	398	wxWindow* win = *i;
	399	win->GTKUpdateCursor();
	400	if (display && *display == NULL && win->m_widget)
	401	*display = gtk_widget_get_display(win->m_widget);
	402	}
	403	}
	404
	405	void wxEndBusyCursor()
	406	{
	407	if (--gs_busyCount > 0)
	408	return;
	409
	410	g_globalCursor = gs_savedCursor;
	411	gs_savedCursor = wxNullCursor;
	412	UpdateCursors(NULL);
	413	}
	414
	415	void wxBeginBusyCursor(const wxCursor* cursor)
	416	{
	417	if (gs_busyCount++ > 0)
	418	return;
	419
	420	wxASSERT_MSG( !gs_savedCursor.IsOk(),
	421	wxT("forgot to call wxEndBusyCursor, will leak memory") );
	422
	423	gs_savedCursor = g_globalCursor;
	424	g_globalCursor = *cursor;
	425	GdkDisplay* display = NULL;
	426	UpdateCursors(&display);
	427	if (display)
	428	gdk_display_flush(display);
	429	}
	430
	431	bool wxIsBusy()
	432	{
	433	return gs_busyCount > 0;
	434	}
	435
	436	void wxSetCursor( const wxCursor& cursor )
	437	{
	438	g_globalCursor = cursor;
	439	UpdateCursors(NULL);
	440	}