248 lines
7.3 KiB
C++
248 lines
7.3 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: wx/private/fontmgr.h
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// Purpose: font management for ports that don't have their own
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// Author: Vaclav Slavik
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// Created: 2006-11-18
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// Copyright: (c) 2001-2002 SciTech Software, Inc. (www.scitechsoft.com)
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// (c) 2006 REA Elektronik GmbH
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_PRIVATE_FONTMGR_H_
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#define _WX_PRIVATE_FONTMGR_H_
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#include "wx/list.h"
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#include "wx/fontutil.h"
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class wxFontsManager;
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class wxFontInstance;
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class wxFontInstanceList;
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class wxFontFace;
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class wxFontBundle;
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class wxFontBundleHash;
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class wxFontMgrFontRefData;
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WX_DECLARE_LIST(wxFontBundle, wxFontBundleList);
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/**
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This class represents single font face with set parameters (point size,
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antialiasing).
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*/
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class wxFontInstanceBase
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{
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protected:
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wxFontInstanceBase(float ptSize, bool aa) : m_ptSize(ptSize), m_aa(aa) {}
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virtual ~wxFontInstanceBase() {}
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public:
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float GetPointSize() const { return m_ptSize; }
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bool IsAntiAliased() const { return m_aa; }
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protected:
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float m_ptSize;
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bool m_aa;
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};
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/// This class represents loaded font face (bundle+weight+italics).
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class wxFontFaceBase
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{
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protected:
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/// Ctor. Creates object with reference count = 0, Acquire() must be
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/// called after the object is created.
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wxFontFaceBase();
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virtual ~wxFontFaceBase();
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public:
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/// Increases reference count of the face
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virtual void Acquire();
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/**
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Decreases reference count of the face. Call this when you no longer
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use the object returned by wxFontBundle. Note that this doesn't destroy
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the object, but only optionally shuts it down, so it's possible to
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call Acquire() and Release() more than once.
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*/
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virtual void Release();
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/**
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Returns instance of the font at given size.
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@param ptSize point size of the font to create; note that this is
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a float and not integer, it should be wxFont's point
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size multiplied by wxDC's scale factor
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@param aa should the font be antialiased?
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*/
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virtual wxFontInstance *GetFontInstance(float ptSize, bool aa);
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protected:
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/// Called to create a new instance of the font by GetFontInstance() if
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/// it wasn't found it cache.
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virtual wxFontInstance *CreateFontInstance(float ptSize, bool aa) = 0;
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protected:
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unsigned m_refCnt;
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wxFontInstanceList *m_instances;
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};
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/**
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This class represents font bundle. Font bundle is set of faces that have
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the same name, but differ in weight and italics.
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*/
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class wxFontBundleBase
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{
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public:
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wxFontBundleBase();
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virtual ~wxFontBundleBase();
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/// Returns name of the bundle
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virtual wxString GetName() const = 0;
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/// Returns true if the font is fixed-width
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virtual bool IsFixed() const = 0;
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/// Type of faces in the bundle
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enum FaceType
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{
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// NB: values of these constants are set so that it's possible to
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// make OR-combinations of them and still get valid enum element
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FaceType_Regular = 0,
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FaceType_Italic = 1,
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FaceType_Bold = 2,
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FaceType_BoldItalic = FaceType_Italic | FaceType_Bold,
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FaceType_Max
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};
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/// Returns true if the given face is available
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bool HasFace(FaceType type) const { return m_faces[type] != NULL; }
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/**
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Returns font face object that can be used to render font of given type.
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Note that this method can only be called if HasFace(type) returns true.
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Acquire() was called on the returned object, you must call Release()
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when you stop using it.
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*/
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wxFontFace *GetFace(FaceType type) const;
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/**
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Returns font face object that can be used to render given font.
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Acquire() was called on the returned object, you must call Release()
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when you stop using it.
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*/
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wxFontFace *GetFaceForFont(const wxFontMgrFontRefData& font) const;
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protected:
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wxFontFace *m_faces[FaceType_Max];
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};
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/**
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Base class for wxFontsManager class, which manages the list of all
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available fonts and their loaded instances.
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*/
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class wxFontsManagerBase
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{
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protected:
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wxFontsManagerBase();
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virtual ~wxFontsManagerBase();
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public:
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/// Returns the font manager singleton, creating it if it doesn't exist
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static wxFontsManager *Get();
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/// Called by wxApp to shut down the manager
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static void CleanUp();
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/// Returns list of all available font bundles
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const wxFontBundleList& GetBundles() const { return *m_list; }
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/**
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Returns object representing font bundle with the given name.
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The returned object is owned by wxFontsManager, you must not delete it.
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*/
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wxFontBundle *GetBundle(const wxString& name) const;
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/**
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Returns object representing font bundle that can be used to render
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given font.
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The returned object is owned by wxFontsManager, you must not delete it.
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*/
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wxFontBundle *GetBundleForFont(const wxFontMgrFontRefData& font) const;
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/// This method must be called by derived
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void AddBundle(wxFontBundle *bundle);
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/// Returns default facename for given wxFont family
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virtual wxString GetDefaultFacename(wxFontFamily family) const = 0;
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private:
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wxFontBundleHash *m_hash;
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wxFontBundleList *m_list;
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protected:
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static wxFontsManager *ms_instance;
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};
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#if defined(__WXDFB__)
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#include "wx/dfb/private/fontmgr.h"
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#endif
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/// wxFontMgrFontRefData implementation using wxFontsManager classes
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class wxFontMgrFontRefData : public wxGDIRefData
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{
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public:
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wxFontMgrFontRefData(int size = wxDEFAULT,
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wxFontFamily family = wxFONTFAMILY_DEFAULT,
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wxFontStyle style = wxFONTSTYLE_NORMAL,
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wxFontWeight weight = wxFONTWEIGHT_NORMAL,
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bool underlined = false,
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const wxString& faceName = wxEmptyString,
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wxFontEncoding encoding = wxFONTENCODING_DEFAULT);
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wxFontMgrFontRefData(const wxFontMgrFontRefData& data);
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~wxFontMgrFontRefData();
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wxFontBundle *GetFontBundle() const;
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wxFontInstance *GetFontInstance(float scale, bool antialiased) const;
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bool IsFixedWidth() const { return GetFontBundle()->IsFixed(); }
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const wxNativeFontInfo *GetNativeFontInfo() const { return &m_info; }
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int GetPointSize() const { return m_info.pointSize; }
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wxString GetFaceName() const { return m_info.faceName; }
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wxFontFamily GetFamily() const { return m_info.family; }
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wxFontStyle GetStyle() const { return m_info.style; }
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wxFontWeight GetWeight() const { return m_info.weight; }
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bool GetUnderlined() const { return m_info.underlined; }
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wxFontEncoding GetEncoding() const { return m_info.encoding; }
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void SetPointSize(int pointSize);
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void SetFamily(wxFontFamily family);
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void SetStyle(wxFontStyle style);
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void SetWeight(wxFontWeight weight);
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void SetFaceName(const wxString& faceName);
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void SetUnderlined(bool underlined);
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void SetEncoding(wxFontEncoding encoding);
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private:
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void EnsureValidFont();
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wxNativeFontInfo m_info;
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wxFontFace *m_fontFace;
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wxFontBundle *m_fontBundle;
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bool m_fontValid;
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};
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#endif // _WX_PRIVATE_FONTMGR_H_
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