4f4c5fcfdf
This is a combination of running clang-tidy with modernize-use-nullptr check for some ports (GTK, X11, OSX) and manual changes to the ports for which it couldn't be used easily (MSW, DFB) and also manually updating the docs. Also replace NULL with null or nullptr in the comments as this is more consistent with the use of nullptr in the code and makes it simpler to grep for the remaining occurrences of NULL itself. And also use null in the assert messages. Only a few occurrences of "NULL" are still left in non-C files, mostly corresponding to unclear comments or string output which it might not be safe to change.
92 lines
3 KiB
C++
92 lines
3 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: wx/gdiobj.h
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// Purpose: wxGDIObject base header
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// Author: Julian Smart
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// Modified by:
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// Created:
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// Copyright: (c) Julian Smart
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// Licence: wxWindows Licence
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/////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_GDIOBJ_H_BASE_
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#define _WX_GDIOBJ_H_BASE_
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#include "wx/object.h"
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// ----------------------------------------------------------------------------
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// wxGDIRefData is the base class for wxXXXData structures which contain the
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// real data for the GDI object and are shared among all wxWin objects sharing
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// the same native GDI object
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// ----------------------------------------------------------------------------
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class WXDLLIMPEXP_CORE wxGDIRefData : public wxObjectRefData
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{
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public:
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// Default ctor which needs to be defined just because we use
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// wxDECLARE_NO_COPY_CLASS() below.
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wxGDIRefData() { }
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// override this in the derived classes to check if this data object is
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// really fully initialized
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virtual bool IsOk() const { return true; }
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private:
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wxDECLARE_NO_COPY_CLASS(wxGDIRefData);
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};
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// ----------------------------------------------------------------------------
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// wxGDIObject: base class for bitmaps, pens, brushes, ...
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// ----------------------------------------------------------------------------
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class WXDLLIMPEXP_CORE wxGDIObject : public wxObject
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{
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public:
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// checks if the object can be used
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virtual bool IsOk() const
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{
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// the cast here is safe because the derived classes always create
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// wxGDIRefData objects
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return m_refData && static_cast<wxGDIRefData *>(m_refData)->IsOk();
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}
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// don't use in the new code, use IsOk() instead
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bool IsNull() const { return m_refData == nullptr; }
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// older version, for backwards compatibility only (but not deprecated
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// because it's still widely used)
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bool Ok() const { return IsOk(); }
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#if defined(__WXMSW__)
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// Creates the resource
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virtual bool RealizeResource() { return false; }
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// Frees the resource
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virtual bool FreeResource(bool WXUNUSED(force) = false) { return false; }
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virtual bool IsFree() const { return false; }
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// Returns handle.
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virtual WXHANDLE GetResourceHandle() const { return nullptr; }
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#endif // defined(__WXMSW__)
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protected:
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// replace base class functions using wxObjectRefData with our own which
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// use wxGDIRefData to ensure that we always work with data objects of the
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// correct type (i.e. derived from wxGDIRefData)
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virtual wxObjectRefData *CreateRefData() const override
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{
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return CreateGDIRefData();
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}
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virtual wxObjectRefData *CloneRefData(const wxObjectRefData *data) const override
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{
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return CloneGDIRefData(static_cast<const wxGDIRefData *>(data));
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}
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virtual wxGDIRefData *CreateGDIRefData() const = 0;
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virtual wxGDIRefData *CloneGDIRefData(const wxGDIRefData *data) const = 0;
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wxDECLARE_DYNAMIC_CLASS(wxGDIObject);
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};
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#endif // _WX_GDIOBJ_H_BASE_
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