252 lines
8.1 KiB
C
252 lines
8.1 KiB
C
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///////////////////////////////////////////////////////////////////////////////
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// Name: wx/os2/gdiimage.h
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// Purpose: wxGDIImage class: base class for wxBitmap, wxIcon, wxCursor
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// under OS/2
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// Author: David Webster (adapted from msw version by Vadim Zeitlin)
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// Modified by:
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// Created: 20.11.99
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// Copyright: (c) 1999 David Webster
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// Licence: wxWindows licence
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///////////////////////////////////////////////////////////////////////////////
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// NB: this is a private header, it is not intended to be directly included by
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// user code (but may be included from other, public, wxWin headers
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#ifndef _WX_OS2_GDIIMAGE_H_
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#define _WX_OS2_GDIIMAGE_H_
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#include "wx/gdiobj.h" // base class
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#include "wx/gdicmn.h" // wxBITMAP_TYPE_INVALID
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#include "wx/list.h"
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class WXDLLIMPEXP_FWD_CORE wxGDIImageRefData;
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class WXDLLIMPEXP_FWD_CORE wxGDIImageHandler;
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class WXDLLIMPEXP_FWD_CORE wxGDIImage;
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WX_DECLARE_EXPORTED_LIST(wxGDIImageHandler, wxGDIImageHandlerList);
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// ----------------------------------------------------------------------------
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// wxGDIImageRefData: common data fields for all derived classes
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// ----------------------------------------------------------------------------
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class WXDLLIMPEXP_CORE wxGDIImageRefData : public wxGDIRefData
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{
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public:
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wxGDIImageRefData()
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{
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m_nWidth = m_nHeight = m_nDepth = 0;
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m_hHandle = 0;
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}
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// accessors
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virtual bool IsOk() const
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{
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if (m_hHandle == 0)
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return false;
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return true;
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}
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void SetSize( int nW
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,int nH
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)
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{ m_nWidth = nW; m_nHeight = nH; }
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// free the ressources we allocated
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virtual void Free() { }
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// for compatibility, the member fields are public
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// the size of the image
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int m_nWidth;
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int m_nHeight;
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// the depth of the image
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int m_nDepth;
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// the handle to it
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union
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{
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WXHANDLE m_hHandle; // for untyped access
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WXHBITMAP m_hBitmap;
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WXHICON m_hIcon;
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WXHCURSOR m_hCursor;
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};
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unsigned int m_uId;
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};
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// ----------------------------------------------------------------------------
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// wxGDIImageHandler: a class which knows how to load/save wxGDIImages.
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// ----------------------------------------------------------------------------
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class WXDLLIMPEXP_CORE wxGDIImageHandler : public wxObject
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{
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public:
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// ctor
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wxGDIImageHandler() { m_lType = wxBITMAP_TYPE_INVALID; }
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wxGDIImageHandler( const wxString& rName
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,const wxString& rExt
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,wxBitmapType lType
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)
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: m_sName(rName)
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, m_sExtension(rExt)
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{
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m_lType = lType;
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}
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// accessors
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void SetName(const wxString& rName) { m_sName = rName; }
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void SetExtension(const wxString& rExt) { m_sExtension = rExt; }
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void SetType(wxBitmapType lType) { m_lType = lType; }
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wxString GetName() const { return m_sName; }
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wxString GetExtension() const { return m_sExtension; }
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wxBitmapType GetType() const { return m_lType; }
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// real handler operations: to implement in derived classes
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virtual bool Create( wxGDIImage* pImage
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,const void* pData
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,wxBitmapType lFlags
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,int nWidth
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,int nHeight
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,int nDepth = 1
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) = 0;
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virtual bool Load( wxGDIImage* pImage
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,const wxString& rName
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,HPS hPs
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,wxBitmapType lFlags
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,int nDesiredWidth
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,int nDesiredHeight
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) = 0;
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virtual bool Load( wxGDIImage* pImage
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,int nId
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,wxBitmapType lFlags
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,int nDesiredWidth
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,int nDesiredHeight
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) = 0;
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virtual bool Save( const wxGDIImage* pImage
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,const wxString& rName
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,wxBitmapType lType
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) const = 0;
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protected:
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wxString m_sName;
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wxString m_sExtension;
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wxBitmapType m_lType;
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}; // end of wxGDIImageHandler
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// ----------------------------------------------------------------------------
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// wxGDIImage: this class supports GDI image handlers which may be registered
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// dynamically and will be used for loading/saving the images in the specified
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// format. It also falls back to wxImage if no appropriate image is found.
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// ----------------------------------------------------------------------------
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class WXDLLIMPEXP_CORE wxGDIImage : public wxGDIObject
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{
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public:
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// handlers list interface
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static wxGDIImageHandlerList& GetHandlers() { return ms_handlers; }
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static void AddHandler(wxGDIImageHandler* hHandler);
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static void InsertHandler(wxGDIImageHandler* hHandler);
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static bool RemoveHandler(const wxString& rName);
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static wxGDIImageHandler* FindHandler(const wxString& rName);
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static wxGDIImageHandler* FindHandler(const wxString& rExtension, wxBitmapType lType);
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static wxGDIImageHandler* FindHandler(wxBitmapType lType);
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static void InitStandardHandlers();
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static void CleanUpHandlers();
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// access to the ref data casted to the right type
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wxGDIImageRefData *GetGDIImageData() const
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{ return (wxGDIImageRefData *)m_refData; }
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// create data if we don't have it yet
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void EnsureHasData() { if ( IsNull() ) m_refData = CreateData(); }
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// accessors
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WXHANDLE GetHandle() const
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{
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wxGDIImageRefData* pData;
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pData = GetGDIImageData();
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if (!pData)
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return 0;
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else
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return pData->m_hHandle;
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}
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void SetHandle(WXHANDLE hHandle)
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{
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wxGDIImageRefData* pData;
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EnsureHasData();
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pData = GetGDIImageData();
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pData->m_hHandle = hHandle;
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}
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int GetWidth() const { return IsNull() ? 0 : GetGDIImageData()->m_nWidth; }
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int GetHeight() const { return IsNull() ? 0 : GetGDIImageData()->m_nHeight; }
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int GetDepth() const { return IsNull() ? 0 : GetGDIImageData()->m_nDepth; }
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wxSize GetSize() const
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{
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return IsNull() ? wxSize(0,0) :
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wxSize(GetGDIImageData()->m_nWidth, GetGDIImageData()->m_nHeight);
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}
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void SetWidth(int nW) { EnsureHasData(); GetGDIImageData()->m_nWidth = nW; }
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void SetHeight(int nH) { EnsureHasData(); GetGDIImageData()->m_nHeight = nH; }
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void SetDepth(int nD) { EnsureHasData(); GetGDIImageData()->m_nDepth = nD; }
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void SetSize( int nW
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,int nH
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)
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{
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EnsureHasData();
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GetGDIImageData()->SetSize(nW, nH);
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}
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void SetSize(const wxSize& rSize) { SetSize(rSize.x, rSize.y); }
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unsigned int GetId(void) const
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{
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wxGDIImageRefData* pData;
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pData = GetGDIImageData();
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if (!pData)
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return 0;
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else
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return pData->m_uId;
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} // end of WxWinGdi_CGDIImage::GetId
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void SetId(unsigned int uId)
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{
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wxGDIImageRefData* pData;
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EnsureHasData();
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pData = GetGDIImageData();
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pData->m_uId = uId;
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}
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// forward some of base class virtuals to wxGDIImageRefData
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bool FreeResource(bool bForce = false);
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virtual WXHANDLE GetResourceHandle() const;
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protected:
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// create the data for the derived class here
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virtual wxGDIImageRefData* CreateData() const = 0;
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virtual wxGDIRefData *CreateGDIRefData() const { return CreateData(); }
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// we can't [efficiently] clone objects of this class
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virtual wxGDIRefData *
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CloneGDIRefData(const wxGDIRefData *WXUNUSED(data)) const
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{
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wxFAIL_MSG( wxT("must be implemented if used") );
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return NULL;
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}
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static wxGDIImageHandlerList ms_handlers;
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};
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#endif // _WX_MSW_GDIIMAGE_H_
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