gdicmn.cpp

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/////////////////////////////////////////////////////////////////////////////
// Name:        gdicmn.cpp
// Purpose:     Common GDI classes
// Author:      Julian Smart
// Modified by:
// Created:     01/02/97
// RCS-ID:      $Id: gdicmn.cpp,v 1.117 2005/02/04 11:04:42 VZ Exp $
// Copyright:   (c) Julian Smart
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
#pragma implementation "gdicmn.h"
#endif

#ifdef __VMS
#define XtDisplay XTDISPLAY
#endif

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

#ifdef __BORLANDC__
#pragma hdrstop
#endif

#include "wx/event.h"
#include "wx/gdicmn.h"
#include "wx/brush.h"
#include "wx/pen.h"
#include "wx/bitmap.h"
#include "wx/icon.h"
#include "wx/cursor.h"
#include "wx/font.h"
#include "wx/palette.h"
#include "wx/app.h"
#include "wx/dc.h"
#include "wx/utils.h"
#include "wx/settings.h"
#include "wx/hashmap.h"

#include "wx/log.h"
#include <string.h>

#if defined(__WXMSW__)
#include "wx/msw/wrapwin.h"
#endif

#ifdef __WXMOTIF__
#ifdef __VMS__
#pragma message disable nosimpint
#endif
#include <Xm/Xm.h>
#ifdef __VMS__
#pragma message enable nosimpint
#endif
#endif

#ifdef __WXX11__
#include "X11/Xlib.h"
#endif

#ifdef __WXMAC__
#include "wx/mac/private.h"
#include "wx/mac/uma.h"
#endif

#if wxUSE_EXTENDED_RTTI

// wxPoint

template<> void wxStringReadValue(const wxString &s , wxPoint &data )
{
    wxSscanf(s, wxT("%d,%d"), &data.x , &data.y ) ;
}

template<> void wxStringWriteValue(wxString &s , const wxPoint &data )
{
    s = wxString::Format(wxT("%d,%d"), data.x , data.y ) ;
}

wxCUSTOM_TYPE_INFO(wxPoint, wxToStringConverter<wxPoint> , wxFromStringConverter<wxPoint>)

template<> void wxStringReadValue(const wxString &s , wxSize &data )
{
    wxSscanf(s, wxT("%d,%d"), &data.x , &data.y ) ;
}

template<> void wxStringWriteValue(wxString &s , const wxSize &data )
{
    s = wxString::Format(wxT("%d,%d"), data.x , data.y ) ;
}

wxCUSTOM_TYPE_INFO(wxSize, wxToStringConverter<wxSize> , wxFromStringConverter<wxSize>)

#endif

IMPLEMENT_ABSTRACT_CLASS(wxDCBase, wxObject)

wxRect::wxRect(const wxPoint& point1, const wxPoint& point2)
{
    x = point1.x;
    y = point1.y;
    width = point2.x - point1.x;
    height = point2.y - point1.y;

    if (width < 0)
    {
        width = -width;
        x = point2.x;
    }
    width++;

    if (height < 0)
    {
        height = -height;
        y = point2.y;
    }
    height++;
}

bool wxRect::operator==(const wxRect& rect) const
{
    return ((x == rect.x) &&
            (y == rect.y) &&
            (width == rect.width) &&
            (height == rect.height));
}

wxRect wxRect::operator+(const wxRect& rect) const
{
    int x1 = wxMin(this->x, rect.x);
    int y1 = wxMin(this->y, rect.y);
    int y2 = wxMax(y+height, rect.height+rect.y);
    int x2 = wxMax(x+width, rect.width+rect.x);
    return wxRect(x1, y1, x2-x1, y2-y1);
}

wxRect& wxRect::Union(const wxRect& rect)
{
    // ignore empty rectangles: union with an empty rectangle shouldn't extend
    // this one to (0, 0)
    if ( !width || !height )
    {
        *this = rect;
    }
    else if ( rect.width && rect.height )
    {
        int x1 = wxMin(x, rect.x);
        int y1 = wxMin(y, rect.y);
        int y2 = wxMax(y + height, rect.height + rect.y);
        int x2 = wxMax(x + width, rect.width + rect.x);

        x = x1;
        y = y1;
        width = x2 - x1;
        height = y2 - y1;
    }
    //else: we're not empty and rect is empty

    return *this;
}

wxRect& wxRect::Inflate(wxCoord dx, wxCoord dy)
{
     if (-2*dx>width)
     {
         // Don't allow deflate to eat more width than we have,
         // a well-defined rectangle cannot have negative width.
         x+=width/2;
         width=0;
     }
     else
     {
         // The inflate is valid.
         x-=dx;
         width+=2*dx;
     }

     if (-2*dy>height)
     {
         // Don't allow deflate to eat more height than we have,
         // a well-defined rectangle cannot have negative height.
         y+=height/2;
         height=0;
     }
     else
     {
         // The inflate is valid.
         y-=dy;
         height+=2*dy;
     }

    return *this;
}

bool wxRect::Inside(int cx, int cy) const
{
    return ( (cx >= x) && (cy >= y)
          && ((cy - y) < height)
          && ((cx - x) < width)
          );
}

wxRect& wxRect::Intersect(const wxRect& rect)
{
    int x2 = GetRight(),
        y2 = GetBottom();

    if ( x < rect.x )
        x = rect.x;
    if ( y < rect.y )
        y = rect.y;
    if ( x2 > rect.GetRight() )
        x2 = rect.GetRight();
    if ( y2 > rect.GetBottom() )
        y2 = rect.GetBottom();

    width = x2 - x + 1;
    height = y2 - y + 1;

    if ( width <= 0 || height <= 0 )
    {
        width =
        height = 0;
    }

    return *this;
}

bool wxRect::Intersects(const wxRect& rect) const
{
    wxRect r = Intersect(rect);

    // if there is no intersection, both width and height are 0
    return r.width != 0;
}

// ============================================================================
// wxColourDatabase
// ============================================================================

// ----------------------------------------------------------------------------
// wxColourDatabase ctor/dtor
// ----------------------------------------------------------------------------

wxColourDatabase::wxColourDatabase ()
{
    // will be created on demand in Initialize()
    m_map = NULL;
}

wxColourDatabase::~wxColourDatabase ()
{
    if ( m_map )
    {
        WX_CLEAR_HASH_MAP(wxStringToColourHashMap, *m_map);

        delete m_map;
    }

#ifdef __WXPM__
    delete [] m_palTable;
#endif
}

// Colour database stuff
void wxColourDatabase::Initialize()
{
    if ( m_map )
    {
        // already initialized
        return;
    }

    m_map = new wxStringToColourHashMap;

    static const struct wxColourDesc
    {
        const wxChar *name;
        unsigned char r,g,b;
    }
    wxColourTable[] =
    {
        {wxT("AQUAMARINE"),112, 219, 147},
        {wxT("BLACK"),0, 0, 0},
        {wxT("BLUE"), 0, 0, 255},
        {wxT("BLUE VIOLET"), 159, 95, 159},
        {wxT("BROWN"), 165, 42, 42},
        {wxT("CADET BLUE"), 95, 159, 159},
        {wxT("CORAL"), 255, 127, 0},
        {wxT("CORNFLOWER BLUE"), 66, 66, 111},
        {wxT("CYAN"), 0, 255, 255},
        {wxT("DARK GREY"), 47, 47, 47},   // ?

        {wxT("DARK GREEN"), 47, 79, 47},
        {wxT("DARK OLIVE GREEN"), 79, 79, 47},
        {wxT("DARK ORCHID"), 153, 50, 204},
        {wxT("DARK SLATE BLUE"), 107, 35, 142},
        {wxT("DARK SLATE GREY"), 47, 79, 79},
        {wxT("DARK TURQUOISE"), 112, 147, 219},
        {wxT("DIM GREY"), 84, 84, 84},
        {wxT("FIREBRICK"), 142, 35, 35},
        {wxT("FOREST GREEN"), 35, 142, 35},
        {wxT("GOLD"), 204, 127, 50},
        {wxT("GOLDENROD"), 219, 219, 112},
        {wxT("GREY"), 128, 128, 128},
        {wxT("GREEN"), 0, 255, 0},
        {wxT("GREEN YELLOW"), 147, 219, 112},
        {wxT("INDIAN RED"), 79, 47, 47},
        {wxT("KHAKI"), 159, 159, 95},
        {wxT("LIGHT BLUE"), 191, 216, 216},
        {wxT("LIGHT GREY"), 192, 192, 192},
        {wxT("LIGHT STEEL BLUE"), 143, 143, 188},
        {wxT("LIME GREEN"), 50, 204, 50},
        {wxT("LIGHT MAGENTA"), 255, 0, 255},
        {wxT("MAGENTA"), 255, 0, 255},
        {wxT("MAROON"), 142, 35, 107},
        {wxT("MEDIUM AQUAMARINE"), 50, 204, 153},
        {wxT("MEDIUM GREY"), 100, 100, 100},
        {wxT("MEDIUM BLUE"), 50, 50, 204},
        {wxT("MEDIUM FOREST GREEN"), 107, 142, 35},
        {wxT("MEDIUM GOLDENROD"), 234, 234, 173},
        {wxT("MEDIUM ORCHID"), 147, 112, 219},
        {wxT("MEDIUM SEA GREEN"), 66, 111, 66},
        {wxT("MEDIUM SLATE BLUE"), 127, 0, 255},
        {wxT("MEDIUM SPRING GREEN"), 127, 255, 0},
        {wxT("MEDIUM TURQUOISE"), 112, 219, 219},
        {wxT("MEDIUM VIOLET RED"), 219, 112, 147},
        {wxT("MIDNIGHT BLUE"), 47, 47, 79},
        {wxT("NAVY"), 35, 35, 142},
        {wxT("ORANGE"), 204, 50, 50},
        {wxT("ORANGE RED"), 255, 0, 127},
        {wxT("ORCHID"), 219, 112, 219},
        {wxT("PALE GREEN"), 143, 188, 143},
        {wxT("PINK"), 188, 143, 234},
        {wxT("PLUM"), 234, 173, 234},
        {wxT("PURPLE"), 176, 0, 255},
        {wxT("RED"), 255, 0, 0},
        {wxT("SALMON"), 111, 66, 66},
        {wxT("SEA GREEN"), 35, 142, 107},
        {wxT("SIENNA"), 142, 107, 35},
        {wxT("SKY BLUE"), 50, 153, 204},
        {wxT("SLATE BLUE"), 0, 127, 255},
        {wxT("SPRING GREEN"), 0, 255, 127},
        {wxT("STEEL BLUE"), 35, 107, 142},
        {wxT("TAN"), 219, 147, 112},
        {wxT("THISTLE"), 216, 191, 216},
        {wxT("TURQUOISE"), 173, 234, 234},
        {wxT("VIOLET"), 79, 47, 79},
        {wxT("VIOLET RED"), 204, 50, 153},
        {wxT("WHEAT"), 216, 216, 191},
        {wxT("WHITE"), 255, 255, 255},
        {wxT("YELLOW"), 255, 255, 0},
        {wxT("YELLOW GREEN"), 153, 204, 50}
    };

    size_t n;

    for ( n = 0; n < WXSIZEOF(wxColourTable); n++ )
    {
        const wxColourDesc& cc = wxColourTable[n];
        (*m_map)[cc.name] = new wxColour(cc.r, cc.g, cc.b);
    }

#ifdef __WXPM__
    m_palTable = new long[n];
    for ( n = 0; n < WXSIZEOF(wxColourTable); n++ )
    {
        const wxColourDesc& cc = wxColourTable[n];
        m_palTable[n] = OS2RGB(cc.r,cc.g,cc.b);
    }
    m_nSize = n;
#endif
}

// ----------------------------------------------------------------------------
// wxColourDatabase operations
// ----------------------------------------------------------------------------

void wxColourDatabase::AddColour(const wxString& name, const wxColour& colour)
{
    Initialize();

    // canonicalize the colour names before using them as keys: they should be
    // in upper case
    wxString colName = name;
    colName.MakeUpper();

    // ... and we also allow both grey/gray
    wxString colNameAlt = colName;
    if ( !colNameAlt.Replace(_T("GRAY"), _T("GREY")) )
    {
        // but in this case it is not necessary so avoid extra search below
        colNameAlt.clear();
    }

    wxStringToColourHashMap::iterator it = m_map->find(colName);
    if ( it == m_map->end() && !colNameAlt.empty() )
        it = m_map->find(colNameAlt);
    if ( it != m_map->end() )
    {
        *(it->second) = colour;
    }
    else // new colour
    {
        (*m_map)[colName] = new wxColour(colour);
    }
}

wxColour wxColourDatabase::Find(const wxString& colour) const
{
    wxColourDatabase * const self = wxConstCast(this, wxColourDatabase);
    self->Initialize();

    // first look among the existing colours

    // make the comparaison case insensitive and also match both grey and gray
    wxString colName = colour;
    colName.MakeUpper();
    wxString colNameAlt = colName;
    if ( !colNameAlt.Replace(_T("GRAY"), _T("GREY")) )
        colNameAlt.clear();

    wxStringToColourHashMap::iterator it = m_map->find(colName);
    if ( it == m_map->end() && !colNameAlt.empty() )
        it = m_map->find(colNameAlt);
    if ( it != m_map->end() )
        return *(it->second);

    // if we didn't find it, query the system, maybe it knows about it
#if defined(__WXGTK__) || defined(__X__)
    wxColour col = wxColour::CreateByName(colour);

    if ( col.Ok() )
    {
        // cache it
        self->AddColour(colour, col);
    }

    return col;
#elif defined(__X__)
    // TODO: move this to wxColour::CreateByName()
    XColor xcolour;

#ifdef __WXMOTIF__
    Display *display = XtDisplay((Widget) wxTheApp->GetTopLevelWidget()) ;
#endif
#ifdef __WXX11__
    Display* display = (Display*) wxGetDisplay();
#endif
    /* MATTHEW: [4] Use wxGetMainColormap */
    if (!XParseColor(display, (Colormap) wxTheApp->GetMainColormap((WXDisplay*) display), colour.ToAscii() ,&xcolour))
        return NULL;

#if wxUSE_NANOX
    unsigned char r = (unsigned char)(xcolour.red);
    unsigned char g = (unsigned char)(xcolour.green);
    unsigned char b = (unsigned char)(xcolour.blue);
#else
    unsigned char r = (unsigned char)(xcolour.red >> 8);
    unsigned char g = (unsigned char)(xcolour.green >> 8);
    unsigned char b = (unsigned char)(xcolour.blue >> 8);
#endif

    wxColour col(r, g, b);
    AddColour(colour, col);

    return col;
#else // other platform
    return wxNullColour;
#endif // platforms
}

wxString wxColourDatabase::FindName(const wxColour& colour) const
{
    wxColourDatabase * const self = wxConstCast(this, wxColourDatabase);
    self->Initialize();