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288 lines
9.8 KiB
C++
288 lines
9.8 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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// Name: wx/headercol.h
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// Purpose: declaration of wxHeaderColumn class
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// Author: Vadim Zeitlin
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// Created: 2008-12-02
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// Copyright: (c) 2008 Vadim Zeitlin <vadim@wxwidgets.org>
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// Licence: wxWindows licence
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///////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_HEADERCOL_H_
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#define _WX_HEADERCOL_H_
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#include "wx/bitmap.h"
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#if wxUSE_HEADERCTRL
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// ----------------------------------------------------------------------------
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// constants
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// ----------------------------------------------------------------------------
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enum
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{
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// special value for column width meaning unspecified/default
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wxCOL_WIDTH_DEFAULT = -1,
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// size the column automatically to fit all values
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wxCOL_WIDTH_AUTOSIZE = -2
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};
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// bit masks for the various column attributes
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enum
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{
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// column can be resized (included in default flags)
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wxCOL_RESIZABLE = 1,
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// column can be clicked to toggle the sort order by its contents
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wxCOL_SORTABLE = 2,
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// column can be dragged to change its order (included in default)
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wxCOL_REORDERABLE = 4,
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// column is not shown at all
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wxCOL_HIDDEN = 8,
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// default flags for wxHeaderColumn ctor
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wxCOL_DEFAULT_FLAGS = wxCOL_RESIZABLE | wxCOL_REORDERABLE
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};
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// ----------------------------------------------------------------------------
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// wxHeaderColumn: interface for a column in a header of controls such as
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// wxListCtrl, wxDataViewCtrl or wxGrid
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// ----------------------------------------------------------------------------
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class WXDLLIMPEXP_CORE wxHeaderColumn
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{
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public:
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// ctors and dtor
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// --------------
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/*
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Derived classes must provide ctors with the following signatures
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(notice that they shouldn't be explicit to allow passing strings/bitmaps
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directly to methods such wxHeaderCtrl::AppendColumn()):
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wxHeaderColumn(const wxString& title,
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int width = wxCOL_WIDTH_DEFAULT,
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wxAlignment align = wxALIGN_NOT,
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int flags = wxCOL_DEFAULT_FLAGS);
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wxHeaderColumn(const wxBitmap &bitmap,
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int width = wxDVC_DEFAULT_WIDTH,
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wxAlignment align = wxALIGN_CENTER,
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int flags = wxCOL_DEFAULT_FLAGS);
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*/
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// virtual dtor for the base class to avoid gcc warnings even though we
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// don't normally delete the objects of this class via a pointer to
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// wxHeaderColumn so it's not necessary, strictly speaking
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virtual ~wxHeaderColumn() { }
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// getters for various attributes
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// ------------------------------
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// notice that wxHeaderColumn only provides getters as this is all the
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// wxHeaderCtrl needs, various derived class must also provide some way to
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// change these attributes but this can be done either at the column level
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// (in which case they should inherit from wxSettableHeaderColumn) or via
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// the methods of the main control in which case you don't need setters in
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// the column class at all
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// title is the string shown for this column
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virtual wxString GetTitle() const = 0;
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// bitmap shown (instead of text) in the column header
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virtual wxBitmap GetBitmap() const = 0; \
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// width of the column in pixels, can be set to wxCOL_WIDTH_DEFAULT meaning
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// unspecified/default
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virtual int GetWidth() const = 0;
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// minimal width can be set for resizable columns to forbid resizing them
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// below the specified size (set to 0 to remove)
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virtual int GetMinWidth() const = 0;
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// alignment of the text: wxALIGN_CENTRE, wxALIGN_LEFT or wxALIGN_RIGHT
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virtual wxAlignment GetAlignment() const = 0;
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// flags manipulations:
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// --------------------
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// notice that while we make GetFlags() pure virtual here and implement the
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// individual flags access in terms of it, for some derived classes it is
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// more natural to implement access to each flag individually, in which
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// case they can use our GetFromIndividualFlags() helper below to implement
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// GetFlags()
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// retrieve all column flags at once: combination of wxCOL_XXX values above
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virtual int GetFlags() const = 0;
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bool HasFlag(int flag) const { return (GetFlags() & flag) != 0; }
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// wxCOL_RESIZABLE
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virtual bool IsResizeable() const
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{ return HasFlag(wxCOL_RESIZABLE); }
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// wxCOL_SORTABLE
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virtual bool IsSortable() const
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{ return HasFlag(wxCOL_SORTABLE); }
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// wxCOL_REORDERABLE
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virtual bool IsReorderable() const
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{ return HasFlag(wxCOL_REORDERABLE); }
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// wxCOL_HIDDEN
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virtual bool IsHidden() const
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{ return HasFlag(wxCOL_HIDDEN); }
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bool IsShown() const
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{ return !IsHidden(); }
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// sorting
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// -------
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// return true if the column is the one currently used for sorting
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virtual bool IsSortKey() const = 0;
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// for sortable columns indicate whether we should sort in ascending or
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// descending order (this should only be taken into account if IsSortKey())
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virtual bool IsSortOrderAscending() const = 0;
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protected:
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// helper for the class overriding IsXXX()
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int GetFromIndividualFlags() const;
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};
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// ----------------------------------------------------------------------------
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// wxSettableHeaderColumn: column which allows to change its fields too
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// ----------------------------------------------------------------------------
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class WXDLLIMPEXP_CORE wxSettableHeaderColumn : public wxHeaderColumn
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{
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public:
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virtual void SetTitle(const wxString& title) = 0;
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virtual void SetBitmap(const wxBitmap& bitmap) = 0;
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virtual void SetWidth(int width) = 0;
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virtual void SetMinWidth(int minWidth) = 0;
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virtual void SetAlignment(wxAlignment align) = 0;
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// see comment for wxHeaderColumn::GetFlags() about the relationship
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// between SetFlags() and Set{Sortable,Reorderable,...}
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// change, set, clear, toggle or test for any individual flag
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virtual void SetFlags(int flags) = 0;
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void ChangeFlag(int flag, bool set);
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void SetFlag(int flag);
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void ClearFlag(int flag);
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void ToggleFlag(int flag);
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virtual void SetResizeable(bool resizable)
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{ ChangeFlag(wxCOL_RESIZABLE, resizable); }
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virtual void SetSortable(bool sortable)
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{ ChangeFlag(wxCOL_SORTABLE, sortable); }
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virtual void SetReorderable(bool reorderable)
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{ ChangeFlag(wxCOL_REORDERABLE, reorderable); }
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virtual void SetHidden(bool hidden)
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{ ChangeFlag(wxCOL_HIDDEN, hidden); }
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// This function can be called to indicate that this column is not used for
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// sorting any more. Under some platforms it's not necessary to do anything
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// in this case as just setting another column as a sort key takes care of
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// everything but under MSW we currently need to call this explicitly to
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// reset the sort indicator displayed on the column.
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virtual void UnsetAsSortKey() { }
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virtual void SetSortOrder(bool ascending) = 0;
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void ToggleSortOrder() { SetSortOrder(!IsSortOrderAscending()); }
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protected:
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// helper for the class overriding individual SetXXX() methods instead of
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// overriding SetFlags()
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void SetIndividualFlags(int flags);
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};
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// ----------------------------------------------------------------------------
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// wxHeaderColumnSimple: trivial generic implementation of wxHeaderColumn
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// ----------------------------------------------------------------------------
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class wxHeaderColumnSimple : public wxSettableHeaderColumn
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{
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public:
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// ctors and dtor
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wxHeaderColumnSimple(const wxString& title,
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int width = wxCOL_WIDTH_DEFAULT,
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wxAlignment align = wxALIGN_NOT,
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int flags = wxCOL_DEFAULT_FLAGS)
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: m_title(title),
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m_width(width),
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m_align(align),
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m_flags(flags)
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{
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Init();
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}
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wxHeaderColumnSimple(const wxBitmap& bitmap,
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int width = wxCOL_WIDTH_DEFAULT,
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wxAlignment align = wxALIGN_CENTER,
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int flags = wxCOL_DEFAULT_FLAGS)
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: m_bitmap(bitmap),
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m_width(width),
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m_align(align),
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m_flags(flags)
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{
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Init();
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}
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// implement base class pure virtuals
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virtual void SetTitle(const wxString& title) wxOVERRIDE { m_title = title; }
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virtual wxString GetTitle() const wxOVERRIDE { return m_title; }
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virtual void SetBitmap(const wxBitmap& bitmap) wxOVERRIDE { m_bitmap = bitmap; }
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wxBitmap GetBitmap() const wxOVERRIDE { return m_bitmap; }
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virtual void SetWidth(int width) wxOVERRIDE { m_width = width; }
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virtual int GetWidth() const wxOVERRIDE { return m_width; }
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virtual void SetMinWidth(int minWidth) wxOVERRIDE { m_minWidth = minWidth; }
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virtual int GetMinWidth() const wxOVERRIDE { return m_minWidth; }
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virtual void SetAlignment(wxAlignment align) wxOVERRIDE { m_align = align; }
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virtual wxAlignment GetAlignment() const wxOVERRIDE { return m_align; }
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virtual void SetFlags(int flags) wxOVERRIDE { m_flags = flags; }
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virtual int GetFlags() const wxOVERRIDE { return m_flags; }
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virtual bool IsSortKey() const wxOVERRIDE { return m_sort; }
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virtual void UnsetAsSortKey() wxOVERRIDE { m_sort = false; }
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virtual void SetSortOrder(bool ascending) wxOVERRIDE
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{
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m_sort = true;
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m_sortAscending = ascending;
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}
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virtual bool IsSortOrderAscending() const wxOVERRIDE { return m_sortAscending; }
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private:
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// common part of all ctors
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void Init()
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{
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m_minWidth = 0;
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m_sort = false;
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m_sortAscending = true;
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}
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wxString m_title;
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wxBitmap m_bitmap;
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int m_width,
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m_minWidth;
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wxAlignment m_align;
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int m_flags;
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bool m_sort,
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m_sortAscending;
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};
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#endif // wxUSE_HEADERCTRL
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#endif // _WX_HEADERCOL_H_
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