src/msw/statbmp.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        statbmp.cpp
   3 // Purpose:     wxStaticBitmap
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Markus Holzem
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ===========================================================================
  13 // declarations
  14 // ===========================================================================
  15
  16 // ---------------------------------------------------------------------------
  17 // headers
  18 // ---------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  21     #pragma implementation "statbmp.h"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 #include "wx/window.h"
  32 #include "wx/msw/private.h"
  33
  34 #ifndef WX_PRECOMP
  35     #include "wx/icon.h"
  36     #include "wx/statbmp.h"
  37 #endif
  38
  39 #include <stdio.h>
  40
  41 // ---------------------------------------------------------------------------
  42 // macors
  43 // ---------------------------------------------------------------------------
  44
  45 #if !USE_SHARED_LIBRARY
  46     IMPLEMENT_DYNAMIC_CLASS(wxStaticBitmap, wxControl)
  47 #endif
  48
  49 // ===========================================================================
  50 // implementation
  51 // ===========================================================================
  52
  53 // ---------------------------------------------------------------------------
  54 // wxStaticBitmap
  55 // ---------------------------------------------------------------------------
  56
  57 bool wxStaticBitmap::Create(wxWindow *parent, wxWindowID id,
  58                             const wxBitmap& bitmap,
  59                             const wxPoint& pos,
  60                             const wxSize& size,
  61                             long style,
  62                             const wxString& name)
  63 {
  64     Init();
  65
  66     SetName(name);
  67     if (parent)
  68         parent->AddChild(this);
  69
  70     m_backgroundColour = parent->GetBackgroundColour() ;
  71     m_foregroundColour = parent->GetForegroundColour() ;
  72
  73     if ( id == -1 )
  74         m_windowId = (int)NewControlId();
  75     else
  76         m_windowId = id;
  77
  78     int x = pos.x;
  79     int y = pos.y;
  80     int width = size.x;
  81     int height = size.y;
  82
  83     m_windowStyle = style;
  84
  85     m_isIcon = bitmap.IsKindOf(CLASSINFO(wxIcon));
  86
  87 #ifdef __WIN32__
  88     // create a static control with either SS_BITMAP or SS_ICON style depending
  89     // on what we have here
  90     const wxChar *classname = _T("STATIC");
  91     int winstyle = m_isIcon ? SS_ICON : SS_BITMAP;
  92 #else // Win16
  93     const wxChar *classname = _T("BUTTON");
  94     int winstyle = BS_OWNERDRAW;
  95 #endif // Win32
  96
  97     m_hWnd = (WXHWND)::CreateWindow
  98                        (
  99                         classname,
 100                         _T(""),
 101                         winstyle | WS_CHILD | WS_VISIBLE,
 102                         0, 0, 0, 0,
 103                         (HWND)parent->GetHWND(),
 104                         (HMENU)m_windowId,
 105                         wxGetInstance(),
 106                         NULL
 107                        );
 108
 109     wxCHECK_MSG( m_hWnd, FALSE, _T("Failed to create static bitmap") );
 110
 111     SetBitmap(bitmap);
 112
 113     // Subclass again for purposes of dialog editing mode
 114     SubclassWin(m_hWnd);
 115
 116     SetFont(GetParent()->GetFont());
 117
 118     SetSize(x, y, width, height);
 119
 120     return TRUE;
 121 }
 122
 123 bool wxStaticBitmap::ImageIsOk() const
 124 {
 125     if ( m_isIcon && m_image.icon )
 126         return m_image.icon->Ok();
 127     else if ( m_image.bitmap )
 128         return m_image.bitmap->Ok();
 129     else
 130         return FALSE;
 131 }
 132
 133 void wxStaticBitmap::Free()
 134 {
 135     if ( m_isIcon )
 136         delete m_image.icon;
 137     else
 138         delete m_image.bitmap;
 139
 140     m_image.icon = NULL;
 141 }
 142
 143 wxSize wxStaticBitmap::DoGetBestSize()
 144 {
 145     // reuse the current size (as wxWindow does) instead of using some
 146     // arbitrary default size (as wxControl, our immediate base class, does)
 147     return wxWindow::DoGetBestSize();
 148 }
 149
 150 void wxStaticBitmap::SetBitmap(const wxBitmap& bitmap)
 151 {
 152     Free();
 153
 154     m_isIcon = bitmap.IsKindOf(CLASSINFO(wxIcon));
 155     if ( m_isIcon )
 156         m_image.icon = new wxIcon((const wxIcon&)bitmap);
 157     else
 158         m_image.bitmap = new wxBitmap(bitmap);
 159
 160     int x, y;
 161     int w, h;
 162     GetPosition(&x, &y);
 163     GetSize(&w, &h);
 164
 165 #ifdef __WIN32__
 166     HANDLE handle = m_isIcon ? (HANDLE)m_image.icon->GetHICON()
 167                              : (HANDLE)m_image.bitmap->GetHBITMAP();
 168     ::SendMessage((HWND)m_hWnd, STM_SETIMAGE,
 169                   m_isIcon ? IMAGE_ICON : IMAGE_BITMAP, (LPARAM)handle);
 170 #endif // Win32
 171
 172     if ( ImageIsOk() )
 173     {
 174         int width = bitmap.GetWidth(),
 175             height = bitmap.GetHeight();
 176         if ( width && height )
 177         {
 178             w = width;
 179             h = height;
 180
 181             ::MoveWindow((HWND)GetHWND(), x, y, width, height, FALSE);
 182         }
 183     }
 184
 185     RECT rect = { x, y, x + w, y + h };
 186     InvalidateRect((HWND)GetParent()->GetHWND(), &rect, TRUE);
 187 }
 188
 189 // under Win32 we use the standard static control style for this
 190 #ifdef __WIN16__
 191 bool wxStaticBitmap::MSWOnDraw(WXDRAWITEMSTRUCT *item)
 192 {
 193     LPDRAWITEMSTRUCT lpDIS = (LPDRAWITEMSTRUCT) item;
 194
 195     wxBitmap* bitmap = m_image.bitmap;
 196     if ( !bitmap->Ok() )
 197         return FALSE;
 198
 199     HDC hDC = lpDIS->hDC;
 200     HDC memDC = ::CreateCompatibleDC(hDC);
 201
 202     HBITMAP old = (HBITMAP) ::SelectObject(memDC, (HBITMAP) bitmap->GetHBITMAP());
 203
 204     if (!old)
 205         return FALSE;
 206
 207     int x = lpDIS->rcItem.left;
 208     int y = lpDIS->rcItem.top;
 209     int width = lpDIS->rcItem.right - x;
 210     int height = lpDIS->rcItem.bottom - y;
 211
 212     // Centre the bitmap in the control area
 213     int x1 = (int) (x + ((width - bitmap->GetWidth()) / 2));
 214     int y1 = (int) (y + ((height - bitmap->GetHeight()) / 2));
 215
 216     ::BitBlt(hDC, x1, y1, bitmap->GetWidth(), bitmap->GetHeight(), memDC, 0, 0, SRCCOPY);
 217
 218     ::SelectObject(memDC, old);
 219
 220     ::DeleteDC(memDC);
 221
 222     return TRUE;
 223 }
 224
 225 long wxStaticBitmap::MSWWindowProc(WXUINT nMsg,
 226                                    WXWPARAM wParam,
 227                                    WXLPARAM lParam)
 228 {
 229     // Ensure that static items get messages. Some controls don't like this
 230     // message to be intercepted (e.g. RichEdit), hence the tests.
 231     if ( nMsg == WM_NCHITTEST )
 232         return (long)HTCLIENT;
 233
 234     return wxWindow::MSWWindowProc(nMsg, wParam, lParam);
 235 }
 236 #endif // Win16