src/osx/carbon/bmpbuttn.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/osx/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 #include "wx/osx/private.h"
  24
  25 //---------------------------------------------------------------------------
  26 // Helper functions
  27
  28 static wxBitmap wxMakeStdSizeBitmap(const wxBitmap& bitmap)
  29 {
  30     // in Mac OS X the icon controls (which are used for borderless bitmap
  31     // buttons) can have only one of the few standard sizes and if they
  32     // don't, the OS rescales them automatically resulting in really ugly
  33     // images, so centre the image in a square of standard size instead
  34
  35     // the supported sizes, sorted in decreasng order
  36     static const int stdSizes[] = { 128, 48, 32, 16, 0 };
  37
  38     const int width = bitmap.GetWidth();
  39     const int height = bitmap.GetHeight();
  40
  41     wxBitmap newBmp(bitmap);
  42
  43     int n;
  44     for ( n = 0; n < (int)WXSIZEOF(stdSizes); n++ )
  45     {
  46         const int sizeStd = stdSizes[n];
  47         if ( width > sizeStd || height > sizeStd )
  48         {
  49             // it will become -1 if the bitmap is larger than the biggest
  50             // supported size, this is intentional
  51             n--;
  52
  53             break;
  54         }
  55     }
  56
  57     if ( n != -1 )
  58     {
  59         const int sizeStd = stdSizes[n];
  60         if ( width != sizeStd || height != sizeStd )
  61         {
  62             wxASSERT_MSG( width <= sizeStd && height <= sizeStd,
  63                           _T("bitmap shouldn't be cropped") );
  64
  65             wxImage square_image = bitmap.ConvertToImage();
  66             newBmp = square_image.Size
  67                      (
  68                          wxSize(sizeStd, sizeStd),
  69                          wxPoint((sizeStd - width)/2, (sizeStd-height)/2)
  70                      );
  71         }
  72     }
  73     //else: let the system rescale the bitmap
  74
  75     return newBmp;
  76 }
  77
  78 //---------------------------------------------------------------------------
  79
  80 class wxMacBitmapButton : public wxMacControl
  81 {
  82 public:
  83     wxMacBitmapButton( wxWindowMac* peer ) : wxMacControl(peer)
  84     {
  85     }
  86
  87     void SetBitmap(const wxBitmap& bitmap)
  88     {
  89         wxBitmap bmp;
  90         if ( GetWXPeer()->HasFlag( wxBORDER_NONE ) )
  91         {
  92             bmp = wxMakeStdSizeBitmap(bitmap);
  93             // TODO set bitmap in peer as well
  94         }
  95         else
  96             bmp = bitmap;
  97
  98         ControlButtonContentInfo info;
  99
 100         if ( GetWXPeer()->HasFlag( wxBORDER_NONE ) )
 101         {
 102             wxMacCreateBitmapButton( &info, bmp, kControlContentIconRef );
 103             if ( info.contentType != kControlNoContent )
 104                 SetData( kControlIconPart, kControlIconContentTag, info );
 105         }
 106         else
 107         {
 108             wxMacCreateBitmapButton( &info, bmp );
 109             if ( info.contentType != kControlNoContent )
 110                 SetData( kControlButtonPart, kControlBevelButtonContentTag, info );
 111         }
 112
 113         wxMacReleaseBitmapButton( &info );
 114     }
 115 };
 116
 117 wxWidgetImplType* wxWidgetImpl::CreateBitmapButton( wxWindowMac* wxpeer,
 118                                     wxWindowMac* parent,
 119                                     wxWindowID id,
 120                                     const wxBitmap& bitmap,
 121                                     const wxPoint& pos,
 122                                     const wxSize& size,
 123                                     long style,
 124                                     long extraStyle)
 125 {
 126     OSStatus err = noErr;
 127     ControlButtonContentInfo info;
 128
 129     Rect bounds = wxMacGetBoundsForControl( wxpeer, pos, size );
 130     wxMacControl* peer = new wxMacBitmapButton( wxpeer );
 131     wxBitmap bmp;
 132
 133     if ( bitmap.Ok() && (style & wxBORDER_NONE) )
 134     {
 135         bmp = wxMakeStdSizeBitmap(bitmap);
 136         // TODO set bitmap in peer as well
 137     }
 138     else
 139         bmp = bitmap;
 140
 141
 142     if ( style & wxBORDER_NONE )
 143     {
 144                 // contrary to the docs this control only works with iconrefs
 145         wxMacCreateBitmapButton( &info, bmp, kControlContentIconRef );
 146         err = CreateIconControl(
 147                 MAC_WXHWND(parent->MacGetTopLevelWindowRef()),
 148                 &bounds, &info, false, peer->GetControlRefAddr() );
 149     }
 150     else
 151     {
 152         wxMacCreateBitmapButton( &info, bmp );
 153         err = CreateBevelButtonControl(
 154                 MAC_WXHWND(parent->MacGetTopLevelWindowRef()), &bounds, CFSTR(""),
 155                 ((style & wxBU_AUTODRAW) ? kControlBevelButtonSmallBevel : kControlBevelButtonNormalBevel ),
 156                 kControlBehaviorOffsetContents, &info, 0, 0, 0, peer->GetControlRefAddr() );
 157     }
 158
 159     verify_noerr( err );
 160
 161     wxMacReleaseBitmapButton( &info );
 162     return peer;
 163 }
 164 #endif