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477
wxWidgets/src/generic/bmpcboxg.cpp
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477
wxWidgets/src/generic/bmpcboxg.cpp
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/////////////////////////////////////////////////////////////////////////////
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// Name: src/generic/bmpcboxg.cpp
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// Purpose: wxBitmapComboBox
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// Author: Jaakko Salli
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// Modified by:
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// Created: Aug-31-2006
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// RCS-ID: $Id: bmpcboxg.cpp 44665 2007-03-07 23:29:03Z VZ $
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// Copyright: (c) 2005 Jaakko Salli
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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// ============================================================================
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// declarations
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// ============================================================================
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// ----------------------------------------------------------------------------
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// headers
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// ----------------------------------------------------------------------------
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#include "wx/wxprec.h"
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#ifdef __BORLANDC__
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#pragma hdrstop
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#endif
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#if wxUSE_BITMAPCOMBOBOX
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#include "wx/bmpcbox.h"
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#if defined(wxGENERIC_BITMAPCOMBOBOX)
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#ifndef WX_PRECOMP
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#include "wx/log.h"
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#endif
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#include "wx/odcombo.h"
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#include "wx/settings.h"
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#include "wx/dc.h"
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#if wxUSE_IMAGE
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#include "wx/image.h"
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#endif
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const wxChar wxBitmapComboBoxNameStr[] = wxT("bitmapComboBox");
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// These macros allow wxArrayPtrVoid to be used in more convenient manner
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#define GetBitmapPtr(n) ((wxBitmap*)m_bitmaps[n])
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#define IMAGE_SPACING_RIGHT 4 // Space left of image
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#define IMAGE_SPACING_LEFT 4 // Space right of image, left of text
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#define IMAGE_SPACING_VERTICAL 2 // Space top and bottom of image
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#define IMAGE_SPACING_CTRL_VERTICAL 7 // Spacing used in control size calculation
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#define EXTRA_FONT_HEIGHT 0 // Add to increase min. height of list items
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// ============================================================================
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// implementation
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// ============================================================================
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BEGIN_EVENT_TABLE(wxBitmapComboBox, wxOwnerDrawnComboBox)
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EVT_SIZE(wxBitmapComboBox::OnSize)
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END_EVENT_TABLE()
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IMPLEMENT_DYNAMIC_CLASS(wxBitmapComboBox, wxOwnerDrawnComboBox)
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void wxBitmapComboBox::Init()
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{
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m_fontHeight = 0;
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m_imgAreaWidth = 0;
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m_inResize = false;
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}
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wxBitmapComboBox::wxBitmapComboBox(wxWindow *parent,
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wxWindowID id,
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const wxString& value,
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const wxPoint& pos,
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const wxSize& size,
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const wxArrayString& choices,
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long style,
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const wxValidator& validator,
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const wxString& name)
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: wxOwnerDrawnComboBox(),
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wxBitmapComboBoxBase()
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{
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Init();
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Create(parent,id,value,pos,size,choices,style,validator,name);
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}
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bool wxBitmapComboBox::Create(wxWindow *parent,
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wxWindowID id,
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const wxString& value,
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const wxPoint& pos,
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const wxSize& size,
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const wxArrayString& choices,
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long style,
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const wxValidator& validator,
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const wxString& name)
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{
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if ( !wxOwnerDrawnComboBox::Create(parent, id, value,
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pos, size,
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choices, style,
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validator, name) )
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{
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return false;
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}
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PostCreate();
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return true;
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}
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bool wxBitmapComboBox::Create(wxWindow *parent,
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wxWindowID id,
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const wxString& value,
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const wxPoint& pos,
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const wxSize& size,
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int n,
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const wxString choices[],
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long style,
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const wxValidator& validator,
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const wxString& name)
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{
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if ( !wxOwnerDrawnComboBox::Create(parent, id, value,
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pos, size, n,
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choices, style,
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validator, name) )
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{
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return false;
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}
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PostCreate();
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return true;
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}
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void wxBitmapComboBox::PostCreate()
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{
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m_fontHeight = GetCharHeight() + EXTRA_FONT_HEIGHT;
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while ( m_bitmaps.GetCount() < GetCount() )
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m_bitmaps.Add( new wxBitmap() );
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}
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wxBitmapComboBox::~wxBitmapComboBox()
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{
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Clear();
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}
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// ----------------------------------------------------------------------------
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// Item manipulation
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// ----------------------------------------------------------------------------
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void wxBitmapComboBox::SetItemBitmap(unsigned int n, const wxBitmap& bitmap)
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{
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wxCHECK_RET( n < GetCount(), wxT("invalid item index") );
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OnAddBitmap(bitmap);
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*GetBitmapPtr(n) = bitmap;
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if ( (int)n == GetSelection() )
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Refresh();
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}
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wxBitmap wxBitmapComboBox::GetItemBitmap(unsigned int n) const
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{
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wxCHECK_MSG( n < GetCount(), wxNullBitmap, wxT("invalid item index") );
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return *GetBitmapPtr(n);
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}
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int wxBitmapComboBox::Insert(const wxString& item, const wxBitmap& bitmap,
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unsigned int pos, void *clientData)
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{
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int n = DoInsertWithImage(item, bitmap, pos);
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if ( n != wxNOT_FOUND )
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SetClientData(n, clientData);
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return n;
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}
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int wxBitmapComboBox::Insert(const wxString& item, const wxBitmap& bitmap,
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unsigned int pos, wxClientData *clientData)
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{
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int n = DoInsertWithImage(item, bitmap, pos);
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if ( n != wxNOT_FOUND )
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SetClientObject(n, clientData);
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return n;
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}
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bool wxBitmapComboBox::OnAddBitmap(const wxBitmap& bitmap)
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{
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if ( bitmap.Ok() )
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{
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int width = bitmap.GetWidth();
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int height = bitmap.GetHeight();
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if ( m_usedImgSize.x <= 0 )
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{
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//
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// If size not yet determined, get it from this image.
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m_usedImgSize.x = width;
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m_usedImgSize.y = height;
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InvalidateBestSize();
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wxSize newSz = GetBestSize();
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wxSize sz = GetSize();
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if ( newSz.y > sz.y )
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SetSize(sz.x, newSz.y);
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else
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DetermineIndent();
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}
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wxCHECK_MSG(width == m_usedImgSize.x && height == m_usedImgSize.y,
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false,
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wxT("you can only add images of same size"));
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}
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return true;
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}
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bool wxBitmapComboBox::DoInsertBitmap(const wxBitmap& bitmap, unsigned int pos)
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{
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if ( !OnAddBitmap(bitmap) )
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return false;
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// NB: We must try to set the image before DoInsert or
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// DoAppend because OnMeasureItem might be called
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// before it returns.
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m_bitmaps.Insert( new wxBitmap(bitmap), pos);
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return true;
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}
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int wxBitmapComboBox::DoAppendWithImage(const wxString& item, const wxBitmap& image)
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{
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unsigned int pos = m_bitmaps.size();
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if ( !DoInsertBitmap(image, pos) )
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return wxNOT_FOUND;
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int index = wxOwnerDrawnComboBox::DoAppend(item);
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if ( index < 0 )
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index = m_bitmaps.size();
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// Need to re-check the index incase DoAppend sorted
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if ( (unsigned int) index != pos )
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{
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wxBitmap* bmp = GetBitmapPtr(pos);
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m_bitmaps.RemoveAt(pos);
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m_bitmaps.Insert(bmp, index);
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}
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return index;
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}
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int wxBitmapComboBox::DoInsertWithImage(const wxString& item,
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const wxBitmap& image,
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unsigned int pos)
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{
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wxCHECK_MSG( IsValidInsert(pos), wxNOT_FOUND, wxT("invalid item index") );
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if ( !DoInsertBitmap(image, pos) )
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return wxNOT_FOUND;
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return wxOwnerDrawnComboBox::DoInsert(item, pos);
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}
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int wxBitmapComboBox::DoAppend(const wxString& item)
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{
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return DoAppendWithImage(item, wxNullBitmap);
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}
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int wxBitmapComboBox::DoInsert(const wxString& item, unsigned int pos)
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{
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return DoInsertWithImage(item, wxNullBitmap, pos);
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}
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void wxBitmapComboBox::Clear()
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{
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wxOwnerDrawnComboBox::Clear();
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unsigned int i;
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for ( i=0; i<m_bitmaps.size(); i++ )
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delete GetBitmapPtr(i);
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m_bitmaps.Empty();
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m_usedImgSize.x = 0;
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m_usedImgSize.y = 0;
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DetermineIndent();
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}
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void wxBitmapComboBox::Delete(unsigned int n)
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{
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wxOwnerDrawnComboBox::Delete(n);
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delete GetBitmapPtr(n);
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m_bitmaps.RemoveAt(n);
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}
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// ----------------------------------------------------------------------------
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// wxBitmapComboBox event handlers and such
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// ----------------------------------------------------------------------------
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void wxBitmapComboBox::DetermineIndent()
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{
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//
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// Recalculate amount of empty space needed in front of
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// text in control itself.
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int indent = m_imgAreaWidth = 0;
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if ( m_usedImgSize.x > 0 )
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{
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indent = m_usedImgSize.x + IMAGE_SPACING_LEFT + IMAGE_SPACING_RIGHT;
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m_imgAreaWidth = indent;
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indent -= 3;
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}
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SetCustomPaintWidth(indent);
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}
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void wxBitmapComboBox::OnSize(wxSizeEvent& event)
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{
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// Prevent infinite looping
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if ( !m_inResize )
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{
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m_inResize = true;
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DetermineIndent();
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m_inResize = false;
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}
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event.Skip();
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}
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wxSize wxBitmapComboBox::DoGetBestSize() const
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{
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wxSize sz = wxOwnerDrawnComboBox::DoGetBestSize();
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// Scale control to match height of highest image.
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int h2 = m_usedImgSize.y + IMAGE_SPACING_CTRL_VERTICAL;
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if ( h2 > sz.y )
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sz.y = h2;
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CacheBestSize(sz);
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return sz;
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}
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// ----------------------------------------------------------------------------
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// wxBitmapComboBox miscellaneous
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// ----------------------------------------------------------------------------
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bool wxBitmapComboBox::SetFont(const wxFont& font)
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{
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bool res = wxOwnerDrawnComboBox::SetFont(font);
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m_fontHeight = GetCharHeight() + EXTRA_FONT_HEIGHT;
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return res;
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}
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// ----------------------------------------------------------------------------
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// wxBitmapComboBox item drawing and measuring
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// ----------------------------------------------------------------------------
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void wxBitmapComboBox::OnDrawBackground(wxDC& dc,
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const wxRect& rect,
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int item,
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int flags) const
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{
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if ( GetCustomPaintWidth() == 0 ||
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!(flags & wxODCB_PAINTING_SELECTED) ||
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item < 0 )
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{
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wxOwnerDrawnComboBox::OnDrawBackground(dc, rect, item, flags);
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return;
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}
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//
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// Just paint simple selection background under where is text
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// (ie. emulate what MSW image choice does).
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//
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int xPos = 0; // Starting x of selection rectangle
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const int vSizeDec = 1; // Vertical size reduction of selection rectangle edges
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xPos = GetCustomPaintWidth() + 2;
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wxCoord x, y;
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GetTextExtent(GetString(item), &x, &y, 0, 0);
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dc.SetTextForeground(wxSystemSettings::GetColour(wxSYS_COLOUR_HIGHLIGHTTEXT));
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wxColour selCol = wxSystemSettings::GetColour(wxSYS_COLOUR_HIGHLIGHT);
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dc.SetPen(selCol);
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dc.SetBrush(selCol);
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dc.DrawRectangle(rect.x+xPos,
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rect.y+vSizeDec,
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x + 4,
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rect.height-(vSizeDec*2));
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}
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void wxBitmapComboBox::OnDrawItem(wxDC& dc,
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const wxRect& rect,
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int item,
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int flags) const
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{
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wxString text;
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int imgAreaWidth = m_imgAreaWidth;
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bool drawText;
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if ( imgAreaWidth == 0 )
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{
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wxOwnerDrawnComboBox::OnDrawItem(dc, rect, item, flags);
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return;
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}
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if ( flags & wxODCB_PAINTING_CONTROL )
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{
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text = GetValue();
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if ( HasFlag(wxCB_READONLY) )
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drawText = true;
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else
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drawText = false;
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}
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else
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{
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text = GetString(item);
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drawText = true;
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}
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const wxBitmap& bmp = *GetBitmapPtr(item);
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if ( bmp.Ok() )
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{
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wxCoord w = bmp.GetWidth();
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wxCoord h = bmp.GetHeight();
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// Draw the image centered
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dc.DrawBitmap(bmp,
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rect.x + (m_usedImgSize.x-w)/2 + IMAGE_SPACING_LEFT,
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rect.y + (rect.height-h)/2,
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true);
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}
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if ( drawText )
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dc.DrawText(GetString(item),
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rect.x + imgAreaWidth + 1,
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rect.y + (rect.height-dc.GetCharHeight())/2);
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}
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wxCoord wxBitmapComboBox::OnMeasureItem(size_t WXUNUSED(item)) const
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{
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int imgHeightArea = m_usedImgSize.y + 2;
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return imgHeightArea > m_fontHeight ? imgHeightArea : m_fontHeight;
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}
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wxCoord wxBitmapComboBox::OnMeasureItemWidth(size_t item) const
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{
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wxCoord x, y;
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GetTextExtent(GetString(item), &x, &y, 0, 0);
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x += m_imgAreaWidth;
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return x;
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}
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#endif // defined(wxGENERIC_BITMAPCOMBOBOX)
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#endif // wxUSE_BITMAPCOMBOBOX
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