594 lines
22 KiB
C++
594 lines
22 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: wx/font.h
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// Purpose: wxFontBase class: the interface of wxFont
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// Author: Vadim Zeitlin
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// Modified by:
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// Created: 20.09.99
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// Copyright: (c) wxWidgets team
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_FONT_H_BASE_
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#define _WX_FONT_H_BASE_
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// ----------------------------------------------------------------------------
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// headers
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// ----------------------------------------------------------------------------
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#include "wx/defs.h" // for wxDEFAULT &c
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#include "wx/fontenc.h" // the font encoding constants
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#include "wx/gdiobj.h" // the base class
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#include "wx/gdicmn.h" // for wxGDIObjListBase
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// ----------------------------------------------------------------------------
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// forward declarations
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// ----------------------------------------------------------------------------
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class WXDLLIMPEXP_FWD_CORE wxFont;
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// ----------------------------------------------------------------------------
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// font constants
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// ----------------------------------------------------------------------------
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// standard font families: these may be used only for the font creation, it
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// doesn't make sense to query an existing font for its font family as,
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// especially if the font had been created from a native font description, it
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// may be unknown
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enum wxFontFamily
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{
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wxFONTFAMILY_DEFAULT = wxDEFAULT,
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wxFONTFAMILY_DECORATIVE = wxDECORATIVE,
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wxFONTFAMILY_ROMAN = wxROMAN,
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wxFONTFAMILY_SCRIPT = wxSCRIPT,
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wxFONTFAMILY_SWISS = wxSWISS,
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wxFONTFAMILY_MODERN = wxMODERN,
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wxFONTFAMILY_TELETYPE = wxTELETYPE,
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wxFONTFAMILY_MAX,
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wxFONTFAMILY_UNKNOWN = wxFONTFAMILY_MAX
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};
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// font styles
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enum wxFontStyle
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{
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wxFONTSTYLE_NORMAL = wxNORMAL,
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wxFONTSTYLE_ITALIC = wxITALIC,
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wxFONTSTYLE_SLANT = wxSLANT,
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wxFONTSTYLE_MAX
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};
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// font weights
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enum wxFontWeight
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{
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wxFONTWEIGHT_NORMAL = wxNORMAL,
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wxFONTWEIGHT_LIGHT = wxLIGHT,
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wxFONTWEIGHT_BOLD = wxBOLD,
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wxFONTWEIGHT_MAX
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};
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// Symbolic font sizes as defined in CSS specification.
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enum wxFontSymbolicSize
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{
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wxFONTSIZE_XX_SMALL = -3,
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wxFONTSIZE_X_SMALL,
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wxFONTSIZE_SMALL,
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wxFONTSIZE_MEDIUM,
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wxFONTSIZE_LARGE,
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wxFONTSIZE_X_LARGE,
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wxFONTSIZE_XX_LARGE
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};
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// the font flag bits for the new font ctor accepting one combined flags word
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enum wxFontFlag
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{
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// no special flags: font with default weight/slant/anti-aliasing
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wxFONTFLAG_DEFAULT = 0,
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// slant flags (default: no slant)
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wxFONTFLAG_ITALIC = 1 << 0,
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wxFONTFLAG_SLANT = 1 << 1,
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// weight flags (default: medium)
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wxFONTFLAG_LIGHT = 1 << 2,
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wxFONTFLAG_BOLD = 1 << 3,
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// anti-aliasing flag: force on or off (default: the current system default)
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wxFONTFLAG_ANTIALIASED = 1 << 4,
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wxFONTFLAG_NOT_ANTIALIASED = 1 << 5,
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// underlined/strikethrough flags (default: no lines)
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wxFONTFLAG_UNDERLINED = 1 << 6,
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wxFONTFLAG_STRIKETHROUGH = 1 << 7,
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// the mask of all currently used flags
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wxFONTFLAG_MASK = wxFONTFLAG_ITALIC |
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wxFONTFLAG_SLANT |
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wxFONTFLAG_LIGHT |
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wxFONTFLAG_BOLD |
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wxFONTFLAG_ANTIALIASED |
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wxFONTFLAG_NOT_ANTIALIASED |
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wxFONTFLAG_UNDERLINED |
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wxFONTFLAG_STRIKETHROUGH
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};
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// ----------------------------------------------------------------------------
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// wxFontInfo describes a wxFont
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// ----------------------------------------------------------------------------
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class wxFontInfo
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{
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public:
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// Default ctor uses the default font size appropriate for the current
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// platform.
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wxFontInfo()
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{ InitPointSize(-1); }
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// These ctors specify the font size, either in points or in pixels.
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wxEXPLICIT wxFontInfo(int pointSize)
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{ InitPointSize(pointSize); }
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wxEXPLICIT wxFontInfo(const wxSize& pixelSize) : m_pixelSize(pixelSize)
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{ Init(); }
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// Setters for the various attributes. All of them return the object itself
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// so that the calls to them could be chained.
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wxFontInfo& Family(wxFontFamily family)
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{ m_family = family; return *this; }
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wxFontInfo& FaceName(const wxString& faceName)
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{ m_faceName = faceName; return *this; }
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wxFontInfo& Bold(bool bold = true)
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{ SetFlag(wxFONTFLAG_BOLD, bold); return *this; }
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wxFontInfo& Light(bool light = true)
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{ SetFlag(wxFONTFLAG_LIGHT, light); return *this; }
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wxFontInfo& Italic(bool italic = true)
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{ SetFlag(wxFONTFLAG_ITALIC, italic); return *this; }
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wxFontInfo& Slant(bool slant = true)
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{ SetFlag(wxFONTFLAG_SLANT, slant); return *this; }
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wxFontInfo& AntiAliased(bool antiAliased = true)
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{ SetFlag(wxFONTFLAG_ANTIALIASED, antiAliased); return *this; }
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wxFontInfo& Underlined(bool underlined = true)
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{ SetFlag(wxFONTFLAG_UNDERLINED, underlined); return *this; }
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wxFontInfo& Strikethrough(bool strikethrough = true)
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{ SetFlag(wxFONTFLAG_STRIKETHROUGH, strikethrough); return *this; }
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wxFontInfo& Encoding(wxFontEncoding encoding)
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{ m_encoding = encoding; return *this; }
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// Set all flags at once.
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wxFontInfo& AllFlags(int flags)
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{ m_flags = flags; return *this; }
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// Accessors are mostly meant to be used by wxFont itself to extract the
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// various pieces of the font description.
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bool IsUsingSizeInPixels() const { return m_pixelSize != wxDefaultSize; }
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int GetPointSize() const { return m_pointSize; }
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wxSize GetPixelSize() const { return m_pixelSize; }
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wxFontFamily GetFamily() const { return m_family; }
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const wxString& GetFaceName() const { return m_faceName; }
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wxFontStyle GetStyle() const
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{
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return m_flags & wxFONTFLAG_ITALIC
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? wxFONTSTYLE_ITALIC
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: m_flags & wxFONTFLAG_SLANT
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? wxFONTSTYLE_SLANT
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: wxFONTSTYLE_NORMAL;
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}
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wxFontWeight GetWeight() const
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{
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return m_flags & wxFONTFLAG_LIGHT
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? wxFONTWEIGHT_LIGHT
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: m_flags & wxFONTFLAG_BOLD
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? wxFONTWEIGHT_BOLD
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: wxFONTWEIGHT_NORMAL;
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}
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bool IsAntiAliased() const
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{
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return (m_flags & wxFONTFLAG_ANTIALIASED) != 0;
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}
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bool IsUnderlined() const
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{
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return (m_flags & wxFONTFLAG_UNDERLINED) != 0;
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}
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bool IsStrikethrough() const
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{
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return (m_flags & wxFONTFLAG_STRIKETHROUGH) != 0;
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}
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wxFontEncoding GetEncoding() const { return m_encoding; }
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// Default copy ctor, assignment operator and dtor are OK.
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private:
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// Common part of all ctor, initializing everything except the size (which
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// is initialized by the ctors themselves).
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void Init()
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{
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m_family = wxFONTFAMILY_DEFAULT;
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m_flags = wxFONTFLAG_DEFAULT;
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m_encoding = wxFONTENCODING_DEFAULT;
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}
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void InitPointSize(int pointSize)
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{
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Init();
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m_pointSize = pointSize;
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m_pixelSize = wxDefaultSize;
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}
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// Turn on or off the given bit in m_flags depending on the value of the
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// boolean argument.
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void SetFlag(int flag, bool on)
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{
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if ( on )
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m_flags |= flag;
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else
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m_flags &= ~flag;
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}
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// The size information: if m_pixelSize is valid (!= wxDefaultSize), then
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// it is used. Otherwise m_pointSize is used, taking into account that if
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// it is == -1, it means that the platform dependent font size should be
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// used.
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int m_pointSize;
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wxSize m_pixelSize;
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wxFontFamily m_family;
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wxString m_faceName;
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int m_flags;
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wxFontEncoding m_encoding;
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};
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// ----------------------------------------------------------------------------
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// wxFontBase represents a font object
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// ----------------------------------------------------------------------------
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class WXDLLIMPEXP_FWD_CORE wxNativeFontInfo;
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class WXDLLIMPEXP_CORE wxFontBase : public wxGDIObject
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{
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public:
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/*
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derived classes should provide the following ctors:
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wxFont();
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wxFont(const wxFontInfo& info);
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wxFont(const wxString& nativeFontInfoString);
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wxFont(const wxNativeFontInfo& info);
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wxFont(int size,
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wxFontFamily family,
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wxFontStyle style,
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wxFontWeight weight,
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bool underlined = false,
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const wxString& face = wxEmptyString,
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wxFontEncoding encoding = wxFONTENCODING_DEFAULT);
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wxFont(const wxSize& pixelSize,
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wxFontFamily family,
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wxFontStyle style,
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wxFontWeight weight,
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bool underlined = false,
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const wxString& face = wxEmptyString,
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wxFontEncoding encoding = wxFONTENCODING_DEFAULT);
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*/
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// creator function
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virtual ~wxFontBase();
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// from the font components
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static wxFont *New(
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int pointSize, // size of the font in points
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wxFontFamily family, // see wxFontFamily enum
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wxFontStyle style, // see wxFontStyle enum
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wxFontWeight weight, // see wxFontWeight enum
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bool underlined = false, // not underlined by default
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const wxString& face = wxEmptyString, // facename
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wxFontEncoding encoding = wxFONTENCODING_DEFAULT); // ISO8859-X, ...
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// from the font components
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static wxFont *New(
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const wxSize& pixelSize, // size of the font in pixels
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wxFontFamily family, // see wxFontFamily enum
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wxFontStyle style, // see wxFontStyle enum
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wxFontWeight weight, // see wxFontWeight enum
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bool underlined = false, // not underlined by default
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const wxString& face = wxEmptyString, // facename
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wxFontEncoding encoding = wxFONTENCODING_DEFAULT); // ISO8859-X, ...
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// from the font components but using the font flags instead of separate
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// parameters for each flag
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static wxFont *New(int pointSize,
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wxFontFamily family,
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int flags = wxFONTFLAG_DEFAULT,
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const wxString& face = wxEmptyString,
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wxFontEncoding encoding = wxFONTENCODING_DEFAULT);
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// from the font components but using the font flags instead of separate
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// parameters for each flag
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static wxFont *New(const wxSize& pixelSize,
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wxFontFamily family,
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int flags = wxFONTFLAG_DEFAULT,
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const wxString& face = wxEmptyString,
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wxFontEncoding encoding = wxFONTENCODING_DEFAULT);
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// from the (opaque) native font description object
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static wxFont *New(const wxNativeFontInfo& nativeFontDesc);
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// from the string representation of wxNativeFontInfo
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static wxFont *New(const wxString& strNativeFontDesc);
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// comparison
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bool operator==(const wxFont& font) const;
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bool operator!=(const wxFont& font) const { return !(*this == font); }
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// accessors: get the font characteristics
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virtual int GetPointSize() const = 0;
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virtual wxSize GetPixelSize() const;
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virtual bool IsUsingSizeInPixels() const;
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wxFontFamily GetFamily() const;
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virtual wxFontStyle GetStyle() const = 0;
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virtual wxFontWeight GetWeight() const = 0;
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virtual bool GetUnderlined() const = 0;
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virtual bool GetStrikethrough() const { return false; }
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virtual wxString GetFaceName() const = 0;
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virtual wxFontEncoding GetEncoding() const = 0;
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virtual const wxNativeFontInfo *GetNativeFontInfo() const = 0;
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virtual bool IsFixedWidth() const;
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wxString GetNativeFontInfoDesc() const;
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wxString GetNativeFontInfoUserDesc() const;
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// change the font characteristics
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virtual void SetPointSize( int pointSize ) = 0;
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virtual void SetPixelSize( const wxSize& pixelSize );
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virtual void SetFamily( wxFontFamily family ) = 0;
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virtual void SetStyle( wxFontStyle style ) = 0;
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virtual void SetWeight( wxFontWeight weight ) = 0;
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virtual void SetUnderlined( bool underlined ) = 0;
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virtual void SetStrikethrough( bool WXUNUSED(strikethrough) ) {}
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virtual void SetEncoding(wxFontEncoding encoding) = 0;
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virtual bool SetFaceName( const wxString& faceName );
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void SetNativeFontInfo(const wxNativeFontInfo& info)
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{ DoSetNativeFontInfo(info); }
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bool SetNativeFontInfo(const wxString& info);
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bool SetNativeFontInfoUserDesc(const wxString& info);
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// Symbolic font sizes support: set the font size to "large" or "very
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// small" either absolutely (i.e. compared to the default font size) or
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// relatively to the given font size.
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void SetSymbolicSize(wxFontSymbolicSize size);
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void SetSymbolicSizeRelativeTo(wxFontSymbolicSize size, int base)
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{
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SetPointSize(AdjustToSymbolicSize(size, base));
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}
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// Adjust the base size in points according to symbolic size.
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static int AdjustToSymbolicSize(wxFontSymbolicSize size, int base);
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// translate the fonts into human-readable string (i.e. GetStyleString()
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// will return "wxITALIC" for an italic font, ...)
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wxString GetFamilyString() const;
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wxString GetStyleString() const;
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wxString GetWeightString() const;
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// the default encoding is used for creating all fonts with default
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// encoding parameter
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static wxFontEncoding GetDefaultEncoding() { return ms_encodingDefault; }
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static void SetDefaultEncoding(wxFontEncoding encoding);
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// this doesn't do anything and is kept for compatibility only
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#if WXWIN_COMPATIBILITY_2_8
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wxDEPRECATED_INLINE(void SetNoAntiAliasing(bool no = true), wxUnusedVar(no);)
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wxDEPRECATED_INLINE(bool GetNoAntiAliasing() const, return false;)
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#endif // WXWIN_COMPATIBILITY_2_8
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// from the font components
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wxDEPRECATED_MSG("use wxFONT{FAMILY,STYLE,WEIGHT}_XXX constants")
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static wxFont *New(
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int pointSize, // size of the font in points
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int family, // see wxFontFamily enum
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int style, // see wxFontStyle enum
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int weight, // see wxFontWeight enum
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bool underlined = false, // not underlined by default
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const wxString& face = wxEmptyString, // facename
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wxFontEncoding encoding = wxFONTENCODING_DEFAULT) // ISO8859-X, ...
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{ return New(pointSize, (wxFontFamily)family, (wxFontStyle)style,
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(wxFontWeight)weight, underlined, face, encoding); }
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// from the font components
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wxDEPRECATED_MSG("use wxFONT{FAMILY,STYLE,WEIGHT}_XXX constants")
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static wxFont *New(
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const wxSize& pixelSize, // size of the font in pixels
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int family, // see wxFontFamily enum
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int style, // see wxFontStyle enum
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int weight, // see wxFontWeight enum
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bool underlined = false, // not underlined by default
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const wxString& face = wxEmptyString, // facename
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wxFontEncoding encoding = wxFONTENCODING_DEFAULT) // ISO8859-X, ...
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{ return New(pixelSize, (wxFontFamily)family, (wxFontStyle)style,
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(wxFontWeight)weight, underlined, face, encoding); }
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protected:
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// the function called by both overloads of SetNativeFontInfo()
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virtual void DoSetNativeFontInfo(const wxNativeFontInfo& info);
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// The function called by public GetFamily(): it can return
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// wxFONTFAMILY_UNKNOWN unlike the public method (see comment there).
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virtual wxFontFamily DoGetFamily() const = 0;
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// Helper functions to recover wxFONTSTYLE/wxFONTWEIGHT and underlined flag
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// values from flags containing a combination of wxFONTFLAG_XXX.
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static wxFontStyle GetStyleFromFlags(int flags)
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{
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return flags & wxFONTFLAG_ITALIC
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? wxFONTSTYLE_ITALIC
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: flags & wxFONTFLAG_SLANT
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? wxFONTSTYLE_SLANT
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: wxFONTSTYLE_NORMAL;
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}
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static wxFontWeight GetWeightFromFlags(int flags)
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{
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return flags & wxFONTFLAG_LIGHT
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? wxFONTWEIGHT_LIGHT
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: flags & wxFONTFLAG_BOLD
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? wxFONTWEIGHT_BOLD
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: wxFONTWEIGHT_NORMAL;
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}
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static bool GetUnderlinedFromFlags(int flags)
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{
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return (flags & wxFONTFLAG_UNDERLINED) != 0;
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}
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static bool GetStrikethroughFromFlags(int flags)
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{
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return (flags & wxFONTFLAG_STRIKETHROUGH) != 0;
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}
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private:
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// the currently default encoding: by default, it's the default system
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// encoding, but may be changed by the application using
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// SetDefaultEncoding() to make all subsequent fonts created without
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// specifying encoding parameter using this encoding
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static wxFontEncoding ms_encodingDefault;
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};
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// wxFontBase <-> wxString utilities, used by wxConfig
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WXDLLIMPEXP_CORE wxString wxToString(const wxFontBase& font);
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WXDLLIMPEXP_CORE bool wxFromString(const wxString& str, wxFontBase* font);
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// this macro must be used in all derived wxFont classes declarations
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#define wxDECLARE_COMMON_FONT_METHODS() \
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wxDEPRECATED_MSG("use wxFONTFAMILY_XXX constants") \
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void SetFamily(int family) \
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{ SetFamily((wxFontFamily)family); } \
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wxDEPRECATED_MSG("use wxFONTSTYLE_XXX constants") \
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void SetStyle(int style) \
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{ SetStyle((wxFontStyle)style); } \
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wxDEPRECATED_MSG("use wxFONTWEIGHT_XXX constants") \
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void SetWeight(int weight) \
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{ SetWeight((wxFontWeight)weight); } \
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wxDEPRECATED_MSG("use wxFONTFAMILY_XXX constants") \
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void SetFamily(wxDeprecatedGUIConstants family) \
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{ SetFamily((wxFontFamily)family); } \
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wxDEPRECATED_MSG("use wxFONTSTYLE_XXX constants") \
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void SetStyle(wxDeprecatedGUIConstants style) \
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{ SetStyle((wxFontStyle)style); } \
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wxDEPRECATED_MSG("use wxFONTWEIGHT_XXX constants") \
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void SetWeight(wxDeprecatedGUIConstants weight) \
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{ SetWeight((wxFontWeight)weight); } \
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\
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/* functions for modifying font in place */ \
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wxFont& MakeBold(); \
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wxFont& MakeItalic(); \
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wxFont& MakeUnderlined(); \
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wxFont& MakeStrikethrough(); \
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wxFont& MakeLarger() { return Scale(1.2f); } \
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wxFont& MakeSmaller() { return Scale(1/1.2f); } \
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wxFont& Scale(float x); \
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/* functions for creating fonts based on this one */ \
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wxFont Bold() const; \
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wxFont GetBaseFont() const; \
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wxFont Italic() const; \
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wxFont Underlined() const; \
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wxFont Strikethrough() const; \
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wxFont Larger() const { return Scaled(1.2f); } \
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wxFont Smaller() const { return Scaled(1/1.2f); } \
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wxFont Scaled(float x) const
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// include the real class declaration
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#if defined(__WXMSW__)
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#include "wx/msw/font.h"
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#elif defined(__WXMOTIF__)
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#include "wx/motif/font.h"
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#elif defined(__WXGTK20__)
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#include "wx/gtk/font.h"
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#elif defined(__WXGTK__)
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#include "wx/gtk1/font.h"
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#elif defined(__WXX11__)
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#include "wx/x11/font.h"
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#elif defined(__WXDFB__)
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#include "wx/dfb/font.h"
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#elif defined(__WXMAC__)
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#include "wx/osx/font.h"
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#elif defined(__WXQT__)
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#include "wx/qt/font.h"
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#endif
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class WXDLLIMPEXP_CORE wxFontList: public wxGDIObjListBase
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{
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public:
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wxFont *FindOrCreateFont(int pointSize,
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wxFontFamily family,
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wxFontStyle style,
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wxFontWeight weight,
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bool underline = false,
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const wxString& face = wxEmptyString,
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wxFontEncoding encoding = wxFONTENCODING_DEFAULT);
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wxDEPRECATED_MSG("use wxFONT{FAMILY,STYLE,WEIGHT}_XXX constants")
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wxFont *FindOrCreateFont(int pointSize, int family, int style, int weight,
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bool underline = false,
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const wxString& face = wxEmptyString,
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wxFontEncoding encoding = wxFONTENCODING_DEFAULT)
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{ return FindOrCreateFont(pointSize, (wxFontFamily)family, (wxFontStyle)style,
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(wxFontWeight)weight, underline, face, encoding); }
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};
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extern WXDLLIMPEXP_DATA_CORE(wxFontList*) wxTheFontList;
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// provide comparison operators to allow code such as
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//
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// if ( font.GetStyle() == wxFONTSTYLE_SLANT )
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//
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// to compile without warnings which it would otherwise provoke from some
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// compilers as it compares elements of different enums
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// Unfortunately some compilers have ambiguity issues when enum comparisons are
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// overloaded so we have to disable the overloads in this case, see
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// wxCOMPILER_NO_OVERLOAD_ON_ENUM definition in wx/platform.h for more details.
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#ifndef wxCOMPILER_NO_OVERLOAD_ON_ENUM
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wxDEPRECATED_MSG("use wxFONTFAMILY_XXX constants") \
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inline bool operator==(wxFontFamily s, wxDeprecatedGUIConstants t)
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{ return static_cast<int>(s) == static_cast<int>(t); }
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wxDEPRECATED_MSG("use wxFONTFAMILY_XXX constants") \
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inline bool operator!=(wxFontFamily s, wxDeprecatedGUIConstants t)
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{ return static_cast<int>(s) != static_cast<int>(t); }
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wxDEPRECATED_MSG("use wxFONTSTYLE_XXX constants") \
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inline bool operator==(wxFontStyle s, wxDeprecatedGUIConstants t)
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{ return static_cast<int>(s) == static_cast<int>(t); }
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wxDEPRECATED_MSG("use wxFONTSTYLE_XXX constants") \
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inline bool operator!=(wxFontStyle s, wxDeprecatedGUIConstants t)
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{ return static_cast<int>(s) != static_cast<int>(t); }
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wxDEPRECATED_MSG("use wxFONTWEIGHT_XXX constants") \
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inline bool operator==(wxFontWeight s, wxDeprecatedGUIConstants t)
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{ return static_cast<int>(s) == static_cast<int>(t); }
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wxDEPRECATED_MSG("use wxFONTWEIGHT_XXX constants") \
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inline bool operator!=(wxFontWeight s, wxDeprecatedGUIConstants t)
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{ return static_cast<int>(s) != static_cast<int>(t); }
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#endif // // wxCOMPILER_NO_OVERLOAD_ON_ENUM
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#endif // _WX_FONT_H_BASE_
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