wxWidgets/src/common/gdicmn.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        gdicmn.cpp
// Purpose:     Common GDI classes
// Author:      Julian Smart
// Modified by:
// Created:     01/02/97
// RCS-ID:      $Id$
// Copyright:   (c) Julian Smart and Markus Holzem
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#ifdef __GNUG__
#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/log.h"
#include <string.h>

#ifdef __WXMSW__
#include <windows.h>
#endif

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

IMPLEMENT_CLASS(wxColourDatabase, wxList)
IMPLEMENT_DYNAMIC_CLASS(wxFontList, wxList)
IMPLEMENT_DYNAMIC_CLASS(wxPenList, wxList)
IMPLEMENT_DYNAMIC_CLASS(wxBrushList, wxList)
IMPLEMENT_DYNAMIC_CLASS(wxBitmapList, wxList)
IMPLEMENT_DYNAMIC_CLASS(wxResourceCache, wxList)

IMPLEMENT_ABSTRACT_CLASS(wxDCBase, wxObject)

wxRect::wxRect(const wxPoint& topLeft, const wxPoint& bottomRight)
{
  x = topLeft.x;
  y = topLeft.y;
  width = bottomRight.x - topLeft.x + 1;
  height = bottomRight.y - topLeft.y + 1;

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

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

wxRect::wxRect(const wxPoint& point, const wxSize& size)
{
    x = point.x; y = point.y;
    width = size.x; height = size.y;
}

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)
{
    *this = (*this + rect);
    return ( *this ) ;
}

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);
}

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

wxColourDatabase::wxColourDatabase (int type) : wxList (type)
{
}

wxColourDatabase::~wxColourDatabase ()
{
  // Cleanup Colour allocated in Initialize()
  wxNode *node = First ();
  while (node)
    {
      wxColour *col = (wxColour *) node->Data ();
      wxNode *next = node->Next ();
      delete col;
      node = next;
    }
}

// Colour database stuff
void wxColourDatabase::Initialize ()
{
    static const struct wxColourDesc
    {
        const wxChar *name;
        int 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},
        {wxT("MEDIUM GOLDENROD"), 234, 234, 173},
        {wxT("MEDIUM FOREST GREEN"), 107, 142, 35},
        {wxT("LIGHT MAGENTA"), 255, 0, 255},
        {wxT("MEDIUM GREY"), 100, 100, 100},
    };

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

/*
 * Changed by Ian Brown, July 1994.
 *
 * When running under X, the Colour Database starts off empty. The X server
 * is queried for the colour first time after which it is entered into the
 * database. This allows our client to use the server colour database which
 * is hopefully gamma corrected for the display being used.
 */

wxColour *wxColourDatabase::FindColour(const wxString& colour)
{
    // VZ: make the comparaison case insensitive and also match both grey and
    //     gray
    wxString colName = colour;
    colName.MakeUpper();
    wxString colName2 = colName;
    if ( !colName2.Replace(_T("GRAY"), _T("GREY")) )
        colName2.clear();

    wxNode *node = First();
    while ( node )
    {
        const wxChar *key = node->GetKeyString();
        if ( colName == key || colName2 == key )
        {
            return (wxColour *)node->Data();
        }

        node = node->Next();
    }

#ifdef __WXMSW__
  return NULL;
#endif
#ifdef __WXPM__
  return NULL;
#endif

// TODO for other implementations. This should really go into
// platform-specific directories.
#ifdef __WXMAC__
  return NULL;
#endif
#ifdef __WXSTUBS__
  return NULL;
#endif

#ifdef __WXGTK__
  wxColour *col = new wxColour( colour );

  if (!(col->Ok())) {
      delete col;
      return (wxColour *) NULL;
  }
  Append( colour, col );
  return col;
#endif

#ifdef __X__
    XColor xcolour;

#ifdef __WXMOTIF__
    Display *display = XtDisplay((Widget) wxTheApp->GetTopLevelWidget()) ;
#endif
#ifdef __XVIEW__
    Xv_Screen screen = xv_get(xview_server, SERVER_NTH_SCREEN, 0);
    Xv_opaque root_window = xv_get(screen, XV_ROOT);
    Display *display = (Display *)xv_get(root_window, XV_DISPLAY);
#endif

    /* MATTHEW: [4] Use wxGetMainColormap */
    if (!XParseColor(display, (Colormap) wxTheApp->GetMainColormap((WXDisplay*) display), colour,&xcolour))
      return NULL;

    unsigned char r = (unsigned char)(xcolour.red >> 8);
    unsigned char g = (unsigned char)(xcolour.green >> 8);
    unsigned char b = (unsigned char)(xcolour.blue >> 8);

    wxColour *col = new wxColour(r, g, b);
    Append(colour, col);

    return col;
#endif // __X__
}

wxString wxColourDatabase::FindName (const wxColour& colour) const
{
    wxString name;

    unsigned char red = colour.Red ();
    unsigned char green = colour.Green ();
    unsigned char blue = colour.Blue ();

    for (wxNode * node = First (); node; node = node->Next ())
    {
        wxColour *col = (wxColour *) node->Data ();

        if (col->Red () == red && col->Green () == green && col->Blue () == blue)
        {
            const wxChar *found = node->GetKeyString();
            if ( found )
            {
                name = found;

                break;
            }
        }
    }

    return name;
}

void wxInitializeStockLists () {
  wxTheBrushList = new wxBrushList;
  wxThePenList = new wxPenList;
  wxTheFontList = new wxFontList;
  wxTheBitmapList = new wxBitmapList;
}

void wxInitializeStockObjects ()
{
#ifdef __WXMOTIF__
#endif
#ifdef __X__
  // TODO
  //  wxFontPool = new XFontPool;
#endif

  // why under MSW fonts shouldn't have the standard system size?
/*
#ifdef __WXMSW__
  static const int sizeFont = 10;
#else
  static const int sizeFont = 12;
#endif
*/

//  wxNORMAL_FONT = new wxFont (sizeFont, wxMODERN, wxNORMAL, wxNORMAL);
  wxNORMAL_FONT = new wxFont(wxSystemSettings::GetSystemFont(wxSYS_DEFAULT_GUI_FONT));
  static const int sizeFont = wxNORMAL_FONT->GetPointSize();

  wxSMALL_FONT = new wxFont (sizeFont - 2, wxSWISS, wxNORMAL, wxNORMAL);
  wxITALIC_FONT = new wxFont (sizeFont, wxROMAN, wxITALIC, wxNORMAL);
  wxSWISS_FONT = new wxFont (sizeFont, wxSWISS, wxNORMAL, wxNORMAL);

  wxRED_PEN = new wxPen ("RED", 1, wxSOLID);
  wxCYAN_PEN = new wxPen ("CYAN", 1, wxSOLID);
  wxGREEN_PEN = new wxPen ("GREEN", 1, wxSOLID);
  wxBLACK_PEN = new wxPen ("BLACK", 1, wxSOLID);
  wxWHITE_PEN = new wxPen ("WHITE", 1, wxSOLID);
  wxTRANSPARENT_PEN = new wxPen ("BLACK", 1, wxTRANSPARENT);
  wxBLACK_DASHED_PEN = new wxPen ("BLACK", 1, wxSHORT_DASH);
  wxGREY_PEN = new wxPen ("GREY", 1, wxSOLID);
  wxMEDIUM_GREY_PEN = new wxPen ("MEDIUM GREY", 1, wxSOLID);
  wxLIGHT_GREY_PEN = new wxPen ("LIGHT GREY", 1, wxSOLID);

  wxBLUE_BRUSH = new wxBrush ("BLUE", wxSOLID);
  wxGREEN_BRUSH = new wxBrush ("GREEN", wxSOLID);
  wxWHITE_BRUSH = new wxBrush ("WHITE", wxSOLID);
  wxBLACK_BRUSH = new wxBrush ("BLACK", wxSOLID);
  wxTRANSPARENT_BRUSH = new wxBrush ("BLACK", wxTRANSPARENT);
  wxCYAN_BRUSH = new wxBrush ("CYAN", wxSOLID);
  wxRED_BRUSH = new wxBrush ("RED", wxSOLID);
  wxGREY_BRUSH = new wxBrush ("GREY", wxSOLID);
  wxMEDIUM_GREY_BRUSH = new wxBrush ("MEDIUM GREY", wxSOLID);
  wxLIGHT_GREY_BRUSH = new wxBrush ("LIGHT GREY", wxSOLID);

  wxBLACK = new wxColour ("BLACK");
  wxWHITE = new wxColour ("WHITE");
  wxRED = new wxColour ("RED");
  wxBLUE = new wxColour ("BLUE");
  wxGREEN = new wxColour ("GREEN");
  wxCYAN = new wxColour ("CYAN");
  wxLIGHT_GREY = new wxColour ("LIGHT GREY");

  wxSTANDARD_CURSOR = new wxCursor (wxCURSOR_ARROW);
  wxHOURGLASS_CURSOR = new wxCursor (wxCURSOR_WAIT);
  wxCROSS_CURSOR = new wxCursor (wxCURSOR_CROSS);
}

void wxDeleteStockObjects ()
{
  wxDELETE(wxNORMAL_FONT);
  wxDELETE(wxSMALL_FONT);
  wxDELETE(wxITALIC_FONT);
  wxDELETE(wxSWISS_FONT);

  wxDELETE(wxRED_PEN);
  wxDELETE(wxCYAN_PEN);
  wxDELETE(wxGREEN_PEN);
  wxDELETE(wxBLACK_PEN);
  wxDELETE(wxWHITE_PEN);
  wxDELETE(wxTRANSPARENT_PEN);
  wxDELETE(wxBLACK_DASHED_PEN);
  wxDELETE(wxGREY_PEN);
  wxDELETE(wxMEDIUM_GREY_PEN);
  wxDELETE(wxLIGHT_GREY_PEN);

  wxDELETE(wxBLUE_BRUSH);
  wxDELETE(wxGREEN_BRUSH);
  wxDELETE(wxWHITE_BRUSH);
  wxDELETE(wxBLACK_BRUSH);
  wxDELETE(wxTRANSPARENT_BRUSH);
  wxDELETE(wxCYAN_BRUSH);
  wxDELETE(wxRED_BRUSH);
  wxDELETE(wxGREY_BRUSH);
  wxDELETE(wxMEDIUM_GREY_BRUSH);
  wxDELETE(wxLIGHT_GREY_BRUSH);

  wxDELETE(wxBLACK);
  wxDELETE(wxWHITE);
  wxDELETE(wxRED);
  wxDELETE(wxBLUE);
  wxDELETE(wxGREEN);
  wxDELETE(wxCYAN);
  wxDELETE(wxLIGHT_GREY);

  wxDELETE(wxSTANDARD_CURSOR);
  wxDELETE(wxHOURGLASS_CURSOR);
  wxDELETE(wxCROSS_CURSOR);
}

void wxDeleteStockLists() {
  wxDELETE(wxTheBrushList);
  wxDELETE(wxThePenList);
  wxDELETE(wxTheFontList);
  wxDELETE(wxTheBitmapList);
}

wxBitmapList::wxBitmapList ()
{
}

wxBitmapList::~wxBitmapList ()
{
  wxNode *node = First ();
  while (node)
    {
      wxBitmap *bitmap = (wxBitmap *) node->Data ();
      wxNode *next = node->Next ();
      if (bitmap->GetVisible())
        delete bitmap;
      node = next;
    }
}

// Pen and Brush lists
wxPenList::~wxPenList ()
{
  wxNode *node = First ();
  while (node)
    {
      wxPen *pen = (wxPen *) node->Data ();
      wxNode *next = node->Next ();
      if (pen->GetVisible())
        delete pen;
      node = next;
    }
}

void wxPenList::AddPen (wxPen * pen)
{
  Append (pen);
}

void wxPenList::RemovePen (wxPen * pen)
{
  DeleteObject (pen);
}

wxPen *wxPenList::FindOrCreatePen (const wxColour& colour, int width, int style)
{
  for (wxNode * node = First (); node; node = node->Next ())
    {
      wxPen *each_pen = (wxPen *) node->Data ();
      if (each_pen &&
          each_pen->GetVisible() &&
          each_pen->GetWidth () == width &&
          each_pen->GetStyle () == style &&
          each_pen->GetColour ().Red () == colour.Red () &&
          each_pen->GetColour ().Green () == colour.Green () &&
          each_pen->GetColour ().Blue () == colour.Blue ())
        return each_pen;
    }
  wxPen *pen = new wxPen (colour, width, style);

  // Yes, we can return a pointer to this in a later FindOrCreatePen call,
  // because we created it within FindOrCreatePen. Safeguards against
  // returning a pointer to an automatic variable and hanging on to it
  // (dangling pointer).
  pen->SetVisible(TRUE);

  return pen;
}

wxBrushList::~wxBrushList ()
{
  wxNode *node = First ();
  while (node)
    {
      wxBrush *brush = (wxBrush *) node->Data ();
      wxNode *next = node->Next ();
      if (brush->GetVisible())
        delete brush;
      node = next;
    }
}

void wxBrushList::AddBrush (wxBrush * brush)
{
  Append (brush);
}

wxBrush *wxBrushList::FindOrCreateBrush (const wxColour& colour, int style)
{
  for (wxNode * node = First (); node; node = node->Next ())
    {
      wxBrush *each_brush = (wxBrush *) node->Data ();
      if (each_brush &&
          each_brush->GetVisible() &&
          each_brush->GetStyle () == style &&
          each_brush->GetColour ().Red () == colour.Red () &&
          each_brush->GetColour ().Green () == colour.Green () &&
          each_brush->GetColour ().Blue () == colour.Blue ())
        return each_brush;
    }

  // Yes, we can return a pointer to this in a later FindOrCreateBrush call,
  // because we created it within FindOrCreateBrush. Safeguards against
  // returning a pointer to an automatic variable and hanging on to it
  // (dangling pointer).
  wxBrush *brush = new wxBrush (colour, style);

  brush->SetVisible(TRUE);

  return brush;
}

void wxBrushList::RemoveBrush (wxBrush * brush)
{
  DeleteObject (brush);
}

wxFontList::~wxFontList ()
{
    wxNode *node = First ();
    while (node)
    {
        // Only delete objects that are 'visible', i.e.
        // that have been created using FindOrCreate...,
        // where the pointers are expected to be shared
        // (and therefore not deleted by any one part of an app).
        wxFont *font = (wxFont *) node->Data ();
        wxNode *next = node->Next ();
        if (font->GetVisible())
            delete font;
        node = next;
    }
}

void wxFontList::AddFont (wxFont * font)
{
  Append (font);
}

void wxFontList::RemoveFont (wxFont * font)
{
  DeleteObject (font);
}

wxFont *wxFontList::FindOrCreateFont(int pointSize,
                                     int family,
                                     int style,
                                     int weight,
                                     bool underline,
                                     const wxString& facename,
                                     wxFontEncoding encoding)
{
    wxFont *font = (wxFont *)NULL;
    wxNode *node;
    for ( node = First(); node; node = node->Next() )
    {
        font = (wxFont *)node->Data();
        if ( font->GetVisible() &&
             font->Ok() &&
             font->GetPointSize () == pointSize &&
             font->GetStyle () == style &&
             font->GetWeight () == weight &&
             font->GetUnderlined () == underline )
        {
            int fontFamily = font->GetFamily();

#if defined(__WXGTK__)
            // under GTK the default family is wxSWISS, so looking for a font
            // with wxDEFAULT family should return a wxSWISS one instead of
            // creating a new one
            bool same = (fontFamily == family) ||
                        (fontFamily == wxSWISS && family == wxDEFAULT);
#else // !GTK
            // VZ: but why elsewhere do we require an exact match? mystery...
            bool same = fontFamily == family;
#endif // GTK/!GTK

            // empty facename matches anything at all: this is bad because
            // depending on which fonts are already created, we might get back
            // a different font if we create it with empty facename, but it is
            // still better than never matching anything in the cache at all
            // in this case
            if ( same && !!facename )
            {
                const wxString& fontFace = font->GetFaceName();

                // empty facename matches everything
                same = !fontFace || fontFace == facename;
            }

            if ( same && (encoding != wxFONTENCODING_DEFAULT) )
            {
                // have to match the encoding too
                same = font->GetEncoding() == encoding;
            }

            if ( same )
            {
                return font;
            }
        }
    }

    if ( !node )
    {
        // font not found, create the new one
        font = new wxFont(pointSize, family, style, weight,
                          underline, facename, encoding);

        // and mark it as being cacheable
        font->SetVisible(TRUE);
    }

    return font;
}

void wxBitmapList::AddBitmap(wxBitmap *bitmap)
{
    Append(bitmap);
}

void wxBitmapList::RemoveBitmap(wxBitmap *bitmap)
{
    DeleteObject(bitmap);
}

wxSize wxGetDisplaySize()
{
    int x, y;
    wxDisplaySize(& x, & y);
    return wxSize(x, y);
}

wxSize wxGetDisplaySizeMM()
{
    int x, y;
    wxDisplaySizeMM(& x, & y);
    return wxSize(x, y);
}

wxResourceCache::~wxResourceCache ()
{
    wxNode *node = First ();
    while (node) {
        wxObject *item = (wxObject *)node->Data();
        delete item;

        node = node->Next ();
    }
}