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 IMPLEMENT_DYNAMIC_CLASS(wxStaticBitmap, wxControl)
  46
  47 // ===========================================================================
  48 // implementation
  49 // ===========================================================================
  50
  51 // ---------------------------------------------------------------------------
  52 // wxStaticBitmap
  53 // ---------------------------------------------------------------------------
  54
  55 bool wxStaticBitmap::Create(wxWindow *parent, wxWindowID id,
  56                             const wxGDIImage& bitmap,
  57                             const wxPoint& pos,
  58                             const wxSize& size,
  59                             long style,
  60                             const wxString& name)
  61 {
  62     Init();
  63
  64     SetName(name);
  65     if (parent)
  66         parent->AddChild(this);
  67
  68     m_backgroundColour = parent->GetBackgroundColour() ;
  69     m_foregroundColour = parent->GetForegroundColour() ;
  70
  71     if ( id == -1 )
  72         m_windowId = (int)NewControlId();
  73     else
  74         m_windowId = id;
  75
  76     int x = pos.x;
  77     int y = pos.y;
  78     int width = size.x;
  79     int height = size.y;
  80
  81     m_windowStyle = style;
  82
  83     // we may have either bitmap or icon: if a bitmap with mask is passed, we
  84     // will transform it to an icon ourselves because otherwise the mask will
  85     // be ignored by Windows
  86     wxIcon *icon = (wxIcon *)NULL;
  87     m_isIcon = bitmap.IsKindOf(CLASSINFO(wxIcon));
  88     if ( !m_isIcon )
  89     {
  90         const wxBitmap& bmp = (const wxBitmap&)bitmap;
  91         wxMask *mask = bmp.GetMask();
  92         if ( mask && mask->GetMaskBitmap() )
  93         {
  94             icon = new wxIcon;
  95             icon->CopyFromBitmap(bmp);
  96
  97             m_isIcon = TRUE;
  98         }
  99     }
 100
 101 #ifdef __WIN32__
 102     // create a static control with either SS_BITMAP or SS_ICON style depending
 103     // on what we have here
 104     const wxChar *classname = wxT("STATIC");
 105     int winstyle = m_isIcon ? SS_ICON : SS_BITMAP;
 106 #else // Win16
 107     const wxChar *classname = wxT("BUTTON");
 108     int winstyle = BS_OWNERDRAW;
 109 #endif // Win32
 110
 111     m_hWnd = (WXHWND)::CreateWindow
 112                        (
 113                         classname,
 114                         wxT(""),
 115                         // NOT DISABLED!!! We want to move it in Dialog Editor.
 116                         winstyle | WS_CHILD | WS_VISIBLE, // | WS_DISABLED,
 117                         0, 0, 0, 0,
 118                         (HWND)parent->GetHWND(),
 119                         (HMENU)m_windowId,
 120                         wxGetInstance(),
 121                         NULL
 122                        );
 123
 124     wxCHECK_MSG( m_hWnd, FALSE, wxT("Failed to create static bitmap") );
 125
 126     SetImage(icon ? icon : &bitmap);
 127     delete icon; // may be NULL, ok
 128
 129     // Subclass again for purposes of dialog editing mode
 130     SubclassWin(m_hWnd);
 131
 132     SetFont(GetParent()->GetFont());
 133
 134     SetSize(x, y, width, height);
 135
 136     return TRUE;
 137 }
 138
 139 bool wxStaticBitmap::ImageIsOk() const
 140 {
 141     return m_image && m_image->Ok();
 142 }
 143
 144 void wxStaticBitmap::Free()
 145 {
 146     delete m_image;
 147
 148     m_image = NULL;
 149 }
 150
 151 wxSize wxStaticBitmap::DoGetBestSize() const
 152 {
 153     // reuse the current size (as wxWindow does) instead of using some
 154     // arbitrary default size (as wxControl, our immediate base class, does)
 155     return wxWindow::DoGetBestSize();
 156 }
 157
 158 void wxStaticBitmap::SetImage(const wxGDIImage* image)
 159 {
 160     Free();
 161
 162     const wxIcon *icon = wxDynamicCast(image, wxIcon);
 163     m_isIcon = icon != NULL;
 164     if ( m_isIcon )
 165     {
 166         m_image = new wxIcon(*icon);
 167     }
 168     else
 169     {
 170         wxASSERT_MSG( wxDynamicCast(image, wxBitmap),
 171                       _T("not an icon and not a bitmap?") );
 172
 173         const wxBitmap *bitmap = (wxBitmap *)image;
 174
 175         m_image = new wxBitmap(*bitmap);
 176     }
 177
 178     int x, y;
 179     int w, h;
 180     GetPosition(&x, &y);
 181     GetSize(&w, &h);
 182
 183 #ifdef __WIN32__
 184     HANDLE handle = (HANDLE)m_image->GetHandle();
 185     ::SendMessage(GetHwnd(), STM_SETIMAGE,
 186                   m_isIcon ? IMAGE_ICON : IMAGE_BITMAP, (LPARAM)handle);
 187 #endif // Win32
 188
 189     if ( ImageIsOk() )
 190     {
 191         int width = image->GetWidth(),
 192             height = image->GetHeight();
 193         if ( width && height )
 194         {
 195             w = width;
 196             h = height;
 197
 198             ::MoveWindow(GetHwnd(), x, y, width, height, FALSE);
 199         }
 200     }
 201
 202     RECT rect;
 203     rect.left   = x;
 204     rect.top    = y;
 205     rect.right  = x + w;
 206     rect.bottom = y + h;
 207     InvalidateRect(GetHwndOf(GetParent()), &rect, TRUE);
 208 }
 209
 210 // under Win32 we use the standard static control style for this
 211 #ifdef __WIN16__
 212 bool wxStaticBitmap::MSWOnDraw(WXDRAWITEMSTRUCT *item)
 213 {
 214     LPDRAWITEMSTRUCT lpDIS = (LPDRAWITEMSTRUCT) item;
 215
 216     wxCHECK_MSG( !m_isIcon, FALSE, _T("icons not supported in wxStaticBitmap") );
 217
 218     wxBitmap* bitmap = (wxBitmap *)m_image;
 219     if ( !bitmap->Ok() )
 220         return FALSE;
 221
 222     HDC hDC = lpDIS->hDC;
 223     HDC memDC = ::CreateCompatibleDC(hDC);
 224
 225     HBITMAP old = (HBITMAP) ::SelectObject(memDC, (HBITMAP) bitmap->GetHBITMAP());
 226
 227     if (!old)
 228         return FALSE;
 229
 230     int x = lpDIS->rcItem.left;
 231     int y = lpDIS->rcItem.top;
 232     int width = lpDIS->rcItem.right - x;
 233     int height = lpDIS->rcItem.bottom - y;
 234
 235     // Centre the bitmap in the control area
 236     int x1 = (int) (x + ((width - bitmap->GetWidth()) / 2));
 237     int y1 = (int) (y + ((height - bitmap->GetHeight()) / 2));
 238
 239     ::BitBlt(hDC, x1, y1, bitmap->GetWidth(), bitmap->GetHeight(), memDC, 0, 0, SRCCOPY);
 240
 241     ::SelectObject(memDC, old);
 242
 243     ::DeleteDC(memDC);
 244
 245     return TRUE;
 246 }
 247 #endif // Win16
 248
 249 // We need this or the control can never be moved e.g. in Dialog Editor.
 250 long wxStaticBitmap::MSWWindowProc(WXUINT nMsg,
 251                                    WXWPARAM wParam,
 252                                    WXLPARAM lParam)
 253 {
 254     // Ensure that static items get messages. Some controls don't like this
 255     // message to be intercepted (e.g. RichEdit), hence the tests.
 256     if ( nMsg == WM_NCHITTEST )
 257         return (long)HTCLIENT;
 258
 259     return wxWindow::MSWWindowProc(nMsg, wParam, lParam);
 260 }
 261