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 namespace
  26 {
  27
  28 // define a derived class to override SetBitmap() and also to provide
  29 // InitButtonContentInfo() helper used by CreateBitmapButton()
  30 class wxMacBitmapButton : public wxMacControl, public wxButtonImpl
  31 {
  32 public:
  33     wxMacBitmapButton(wxWindowMac* peer, const wxBitmap& bitmap, int style)
  34         : wxMacControl(peer)
  35     {
  36         // decide what kind of contents the button will have: we want to use an
  37         // icon for buttons with wxBORDER_NONE style as bevel buttons always do
  38         // have a border but icons are limited to a few standard sizes only and
  39         // are resized by the system with extremely ugly results if they don't
  40         // fit (in the past we also tried being smart and pasting a bitmap
  41         // instead of a larger square icon to avoid resizing but this resulted
  42         // in buttons having different size than specified by wx API and
  43         // breaking the layouts and still didn't look good so we don't even try
  44         // to do this any more)
  45         m_isIcon = (style & wxBORDER_NONE) &&
  46                         bitmap.IsOk() && IsOfStandardSize(bitmap);
  47     }
  48
  49     virtual void SetBitmap(const wxBitmap& bitmap)
  50     {
  51         // unfortunately we can't avoid the ugly resizing problem mentioned
  52         // above if a bitmap of supported size was used initially but was
  53         // replaced with another one later as the control was already created
  54         // as an icon control (although maybe we ought to recreate it?)
  55         ControlButtonContentInfo info;
  56         InitButtonContentInfo(info, bitmap);
  57
  58         if ( info.contentType == kControlContentIconRef )
  59             SetData(kControlIconPart, kControlIconContentTag, info);
  60         else if ( info.contentType != kControlNoContent )
  61             SetData(kControlButtonPart, kControlBevelButtonContentTag, info);
  62
  63         wxMacReleaseBitmapButton(&info);
  64     }
  65
  66     void InitButtonContentInfo(ControlButtonContentInfo& info,
  67                                const wxBitmap& bitmap)
  68     {
  69         wxMacCreateBitmapButton(&info, bitmap,
  70                                 m_isIcon ? kControlContentIconRef : 0);
  71     }
  72
  73     void SetPressedBitmap( const wxBitmap& WXUNUSED(bitmap) )
  74     {
  75         // not implemented under Carbon
  76     }
  77
  78 private:
  79     // helper function: returns true if the given bitmap is of one of standard
  80     // sizes supported by OS X icons
  81     static bool IsOfStandardSize(const wxBitmap& bmp)
  82     {
  83         const int w = bmp.GetWidth();
  84
  85         return bmp.GetHeight() == w &&
  86                 (w == 128 || w == 48 || w == 32 || w == 16);
  87     }
  88
  89
  90     // true if this is an icon control, false if it's a bevel button
  91     bool m_isIcon;
  92
  93     wxDECLARE_NO_COPY_CLASS(wxMacBitmapButton);
  94 };
  95
  96 } // anonymous namespace
  97
  98 wxWidgetImplType* wxWidgetImpl::CreateBitmapButton( wxWindowMac* wxpeer,
  99                                     wxWindowMac* parent,
 100                                     wxWindowID WXUNUSED(id),
 101                                     const wxBitmap& bitmap,
 102                                     const wxPoint& pos,
 103                                     const wxSize& size,
 104                                     long style,
 105                                     long WXUNUSED(extraStyle))
 106 {
 107     wxMacBitmapButton* peer = new wxMacBitmapButton(wxpeer, bitmap, style);
 108
 109     OSStatus err;
 110     WXWindow macParent = MAC_WXHWND(parent->MacGetTopLevelWindowRef());
 111     Rect bounds = wxMacGetBoundsForControl( wxpeer, pos, size );
 112
 113     ControlButtonContentInfo info;
 114     peer->InitButtonContentInfo(info, bitmap);
 115
 116     if ( info.contentType == kControlContentIconRef )
 117     {
 118         err = CreateIconControl
 119               (
 120                 macParent,
 121                 &bounds,
 122                 &info,
 123                 false,
 124                 peer->GetControlRefAddr()
 125               );
 126     }
 127     else // normal bevel button
 128     {
 129         err = CreateBevelButtonControl
 130               (
 131                 macParent,
 132                 &bounds,
 133                 CFSTR(""),
 134                 style & wxBU_AUTODRAW ? kControlBevelButtonSmallBevel
 135                                       : kControlBevelButtonNormalBevel,
 136                 kControlBehaviorOffsetContents,
 137                 &info,
 138                 0,  // menu id (no associated menu)
 139                 0,  // menu behaviour (unused)
 140                 0,  // menu placement (unused too)
 141                 peer->GetControlRefAddr()
 142               );
 143     }
 144
 145     verify_noerr( err );
 146
 147     wxMacReleaseBitmapButton( &info );
 148     return peer;
 149 }
 150
 151 #endif // wxUSE_BMPBUTTON