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 // Copyright:   (c) Stefan Csomor
   8 // Licence:     wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11 #include "wx/wxprec.h"
  12
  13 #if wxUSE_BMPBUTTON
  14
  15 #include "wx/bmpbuttn.h"
  16 #include "wx/image.h"
  17
  18 #ifndef WX_PRECOMP
  19     #include "wx/dcmemory.h"
  20 #endif
  21
  22 #include "wx/osx/private.h"
  23
  24 namespace
  25 {
  26
  27 // define a derived class to override SetBitmap() and also to provide
  28 // InitButtonContentInfo() helper used by CreateBitmapButton()
  29 class wxMacBitmapButton : public wxMacControl, public wxButtonImpl
  30 {
  31 public:
  32     wxMacBitmapButton(wxWindowMac* peer, const wxBitmap& bitmap, int style)
  33         : wxMacControl(peer)
  34     {
  35         // decide what kind of contents the button will have: we want to use an
  36         // icon for buttons with wxBORDER_NONE style as bevel buttons always do
  37         // have a border but icons are limited to a few standard sizes only and
  38         // are resized by the system with extremely ugly results if they don't
  39         // fit (in the past we also tried being smart and pasting a bitmap
  40         // instead of a larger square icon to avoid resizing but this resulted
  41         // in buttons having different size than specified by wx API and
  42         // breaking the layouts and still didn't look good so we don't even try
  43         // to do this any more)
  44         m_isIcon = (style & wxBORDER_NONE) &&
  45                         bitmap.IsOk() && IsOfStandardSize(bitmap);
  46     }
  47
  48     virtual void SetBitmap(const wxBitmap& bitmap)
  49     {
  50         // unfortunately we can't avoid the ugly resizing problem mentioned
  51         // above if a bitmap of supported size was used initially but was
  52         // replaced with another one later as the control was already created
  53         // as an icon control (although maybe we ought to recreate it?)
  54         ControlButtonContentInfo info;
  55         InitButtonContentInfo(info, bitmap);
  56
  57         if ( info.contentType == kControlContentIconRef )
  58             SetData(kControlIconPart, kControlIconContentTag, info);
  59         else if ( info.contentType != kControlNoContent )
  60             SetData(kControlButtonPart, kControlBevelButtonContentTag, info);
  61
  62         wxMacReleaseBitmapButton(&info);
  63     }
  64
  65     void InitButtonContentInfo(ControlButtonContentInfo& info,
  66                                const wxBitmap& bitmap)
  67     {
  68         wxMacCreateBitmapButton(&info, bitmap,
  69                                 m_isIcon ? kControlContentIconRef : 0);
  70     }
  71
  72     void SetPressedBitmap( const wxBitmap& WXUNUSED(bitmap) )
  73     {
  74         // not implemented under Carbon
  75     }
  76
  77 private:
  78     // helper function: returns true if the given bitmap is of one of standard
  79     // sizes supported by OS X icons
  80     static bool IsOfStandardSize(const wxBitmap& bmp)
  81     {
  82         const int w = bmp.GetWidth();
  83
  84         return bmp.GetHeight() == w &&
  85                 (w == 128 || w == 48 || w == 32 || w == 16);
  86     }
  87
  88
  89     // true if this is an icon control, false if it's a bevel button
  90     bool m_isIcon;
  91
  92     wxDECLARE_NO_COPY_CLASS(wxMacBitmapButton);
  93 };
  94
  95 } // anonymous namespace
  96
  97 wxWidgetImplType* wxWidgetImpl::CreateBitmapButton( wxWindowMac* wxpeer,
  98                                     wxWindowMac* parent,
  99                                     wxWindowID WXUNUSED(id),
 100                                     const wxBitmap& bitmap,
 101                                     const wxPoint& pos,
 102                                     const wxSize& size,
 103                                     long style,
 104                                     long WXUNUSED(extraStyle))
 105 {
 106     wxMacBitmapButton* peer = new wxMacBitmapButton(wxpeer, bitmap, style);
 107
 108     OSStatus err;
 109     WXWindow macParent = MAC_WXHWND(parent->MacGetTopLevelWindowRef());
 110     Rect bounds = wxMacGetBoundsForControl( wxpeer, pos, size );
 111
 112     ControlButtonContentInfo info;
 113     peer->InitButtonContentInfo(info, bitmap);
 114
 115     if ( info.contentType == kControlContentIconRef )
 116     {
 117         err = CreateIconControl
 118               (
 119                 macParent,
 120                 &bounds,
 121                 &info,
 122                 false,
 123                 peer->GetControlRefAddr()
 124               );
 125     }
 126     else // normal bevel button
 127     {
 128         err = CreateBevelButtonControl
 129               (
 130                 macParent,
 131                 &bounds,
 132                 CFSTR(""),
 133                 style & wxBU_AUTODRAW ? kControlBevelButtonSmallBevel
 134                                       : kControlBevelButtonNormalBevel,
 135                 kControlBehaviorOffsetContents,
 136                 &info,
 137                 0,  // menu id (no associated menu)
 138                 0,  // menu behaviour (unused)
 139                 0,  // menu placement (unused too)
 140                 peer->GetControlRefAddr()
 141               );
 142     }
 143
 144     verify_noerr( err );
 145
 146     wxMacReleaseBitmapButton( &info );
 147     return peer;
 148 }
 149
 150 #endif // wxUSE_BMPBUTTON