src/mac/carbon/bmpbuttn.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/mac/carbon/bmpbuttn.cpp
   3 // Purpose:     wxBitmapButton
   4 // Author:      Stefan Csomor
   5 // Modified by:
   6 // Created:     1998-01-01
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Stefan Csomor
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #include "wx/wxprec.h"
  13
  14 #if wxUSE_BMPBUTTON
  15
  16 #include "wx/bmpbuttn.h"
  17
  18 #ifndef WX_PRECOMP
  19     #include "wx/dcmemory.h"
  20 #endif
  21
  22 IMPLEMENT_DYNAMIC_CLASS(wxBitmapButton, wxButton)
  23
  24 #include "wx/mac/uma.h"
  25
  26 //---------------------------------------------------------------------------
  27 // Helper functions
  28
  29 static wxBitmap wxMakeStdSizeBitmap(const wxBitmap& bitmap)
  30 {
  31     // in Mac OS X the icon controls (which are used for borderless bitmap
  32     // buttons) can have only one of the few standard sizes and if they
  33     // don't, the OS rescales them automatically resulting in really ugly
  34     // images, so centre the image in a square of standard size instead
  35
  36     // the supported sizes, sorted in decreasng order
  37     static const int stdSizes[] = { 128, 48, 32, 16, 0 };
  38
  39     const int width = bitmap.GetWidth();
  40     const int height = bitmap.GetHeight();
  41
  42     wxBitmap newBmp(bitmap);
  43
  44     int n;
  45     for ( n = 0; n < (int)WXSIZEOF(stdSizes); n++ )
  46     {
  47         const int sizeStd = stdSizes[n];
  48         if ( width > sizeStd || height > sizeStd )
  49         {
  50             // it will become -1 if the bitmap is larger than the biggest
  51             // supported size, this is intentional
  52             n--;
  53
  54             break;
  55         }
  56     }
  57
  58     if ( n != -1 )
  59     {
  60         const int sizeStd = stdSizes[n];
  61         if ( width != sizeStd || height != sizeStd )
  62         {
  63             wxASSERT_MSG( width <= sizeStd && height <= sizeStd,
  64                           _T("bitmap shouldn't be cropped") );
  65
  66             newBmp.Create(sizeStd, sizeStd);
  67             wxMemoryDC dcMem;
  68             dcMem.SelectObject(newBmp);
  69             dcMem.Clear();
  70
  71             dcMem.DrawBitmap(bitmap,
  72                              (sizeStd - width)/2, (sizeStd-height)/2,
  73                              true);
  74         }
  75     }
  76     //else: let the system rescale the bitmap
  77
  78     return newBmp;
  79 }
  80
  81 //---------------------------------------------------------------------------
  82
  83 bool wxBitmapButton::Create( wxWindow *parent,
  84                              wxWindowID id, const wxBitmap& bitmap,
  85                              const wxPoint& pos,
  86                              const wxSize& size,
  87                              long style,
  88                              const wxValidator& validator,
  89                              const wxString& name )
  90 {
  91     m_macIsUserPane = false;
  92
  93     // since bitmapbuttonbase is subclass of button calling wxBitmapButtonBase::Create
  94     // essentially creates an additional button
  95     if ( !wxControl::Create( parent, id, pos, size, style, validator, name ) )
  96         return false;
  97
  98     if ( style & wxBU_AUTODRAW )
  99     {
 100         m_marginX =
 101         m_marginY = wxDEFAULT_BUTTON_MARGIN;
 102     }
 103     else
 104     {
 105         m_marginX =
 106         m_marginY = 0;
 107     }
 108
 109     OSStatus err = noErr;
 110     ControlButtonContentInfo info;
 111
 112     Rect bounds = wxMacGetBoundsForControl( this, pos, size );
 113     m_peer = new wxMacControl( this );
 114
 115     if ( bitmap.Ok() && HasFlag(wxBORDER_NONE) )
 116         m_bmpNormal = wxMakeStdSizeBitmap(bitmap);
 117     else
 118         m_bmpNormal = bitmap;
 119
 120
 121     if ( HasFlag( wxBORDER_NONE ) )
 122     {
 123                 // contrary to the docs this control only works with iconrefs
 124         wxMacCreateBitmapButton( &info, m_bmpNormal, kControlContentIconRef );
 125         err = CreateIconControl(
 126                 MAC_WXHWND(parent->MacGetTopLevelWindowRef()),
 127                 &bounds, &info, false, m_peer->GetControlRefAddr() );
 128     }
 129     else
 130     {
 131         wxMacCreateBitmapButton( &info, m_bmpNormal );
 132         err = CreateBevelButtonControl(
 133                 MAC_WXHWND(parent->MacGetTopLevelWindowRef()), &bounds, CFSTR(""),
 134                 ((style & wxBU_AUTODRAW) ? kControlBevelButtonSmallBevel : kControlBevelButtonNormalBevel ),
 135                 kControlBehaviorOffsetContents, &info, 0, 0, 0, m_peer->GetControlRefAddr() );
 136     }
 137
 138     verify_noerr( err );
 139
 140     wxMacReleaseBitmapButton( &info );
 141     wxASSERT_MSG( m_peer != NULL && m_peer->Ok(), wxT("No valid native Mac control") );
 142
 143     MacPostControlCreate( pos, size );
 144
 145     return true;
 146 }
 147
 148 void wxBitmapButton::SetBitmapLabel( const wxBitmap& bitmap )
 149 {
 150     if ( HasFlag( wxBORDER_NONE ) )
 151         m_bmpNormal = wxMakeStdSizeBitmap(bitmap);
 152     else
 153         m_bmpNormal = bitmap;
 154
 155     InvalidateBestSize();
 156
 157     ControlButtonContentInfo info;
 158
 159     if ( HasFlag( wxBORDER_NONE ) )
 160     {
 161         wxMacCreateBitmapButton( &info, m_bmpNormal, kControlContentIconRef );
 162         if ( info.contentType != kControlNoContent )
 163             m_peer->SetData( kControlIconPart, kControlIconContentTag, info );
 164     }
 165     else
 166     {
 167         wxMacCreateBitmapButton( &info, m_bmpNormal );
 168         if ( info.contentType != kControlNoContent )
 169             m_peer->SetData( kControlButtonPart, kControlBevelButtonContentTag, info );
 170     }
 171
 172     wxMacReleaseBitmapButton( &info );
 173 }
 174
 175 wxSize wxBitmapButton::DoGetBestSize() const
 176 {
 177     wxSize best;
 178
 179     best.x = 2 * m_marginX;
 180     best.y = 2 * m_marginY;
 181     if ( m_bmpNormal.Ok() )
 182     {
 183         best.x += m_bmpNormal.GetWidth();
 184         best.y += m_bmpNormal.GetHeight();
 185     }
 186
 187     return best;
 188 }
 189
 190 #endif