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