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                         winstyle | WS_CHILD | WS_VISIBLE | WS_DISABLED,
 116                         0, 0, 0, 0,
 117                         (HWND)parent->GetHWND(),
 118                         (HMENU)m_windowId,
 119                         wxGetInstance(),
 120                         NULL
 121                        );
 122
 123     wxCHECK_MSG( m_hWnd, FALSE, wxT("Failed to create static bitmap") );
 124
 125     SetImage(icon ? icon : &bitmap);
 126     delete icon; // may be NULL, ok
 127
 128     // Subclass again for purposes of dialog editing mode
 129     SubclassWin(m_hWnd);
 130
 131     SetFont(GetParent()->GetFont());
 132
 133     SetSize(x, y, width, height);
 134
 135     return TRUE;
 136 }
 137
 138 bool wxStaticBitmap::ImageIsOk() const
 139 {
 140     return m_image && m_image->Ok();
 141 }
 142
 143 void wxStaticBitmap::Free()
 144 {
 145     delete m_image;
 146
 147     m_image = NULL;
 148 }
 149
 150 wxSize wxStaticBitmap::DoGetBestSize() const
 151 {
 152     // reuse the current size (as wxWindow does) instead of using some
 153     // arbitrary default size (as wxControl, our immediate base class, does)
 154     return wxWindow::DoGetBestSize();
 155 }
 156
 157 void wxStaticBitmap::SetImage(const wxGDIImage* image)
 158 {
 159     Free();
 160
 161     const wxIcon *icon = wxDynamicCast(image, wxIcon);
 162     m_isIcon = icon != NULL;
 163     if ( m_isIcon )
 164     {
 165         m_image = new wxIcon(*icon);
 166     }
 167     else
 168     {
 169         wxASSERT_MSG( wxDynamicCast(image, wxBitmap),
 170                       _T("not an icon and not a bitmap?") );
 171
 172         const wxBitmap *bitmap = (wxBitmap *)image;
 173
 174         m_image = new wxBitmap(*bitmap);
 175     }
 176
 177     int x, y;
 178     int w, h;
 179     GetPosition(&x, &y);
 180     GetSize(&w, &h);
 181
 182 #ifdef __WIN32__
 183     HANDLE handle = (HANDLE)m_image->GetHandle();
 184     ::SendMessage(GetHwnd(), STM_SETIMAGE,
 185                   m_isIcon ? IMAGE_ICON : IMAGE_BITMAP, (LPARAM)handle);
 186 #endif // Win32
 187
 188     if ( ImageIsOk() )
 189     {
 190         int width = image->GetWidth(),
 191             height = image->GetHeight();
 192         if ( width && height )
 193         {
 194             w = width;
 195             h = height;
 196
 197             ::MoveWindow(GetHwnd(), x, y, width, height, FALSE);
 198         }
 199     }
 200
 201     RECT rect;
 202     rect.left   = x;
 203     rect.top    = y;
 204     rect.right  = x + w;
 205     rect.bottom = y + h;
 206     InvalidateRect(GetHwndOf(GetParent()), &rect, TRUE);
 207 }
 208
 209 // under Win32 we use the standard static control style for this
 210 #ifdef __WIN16__
 211 bool wxStaticBitmap::MSWOnDraw(WXDRAWITEMSTRUCT *item)
 212 {
 213     LPDRAWITEMSTRUCT lpDIS = (LPDRAWITEMSTRUCT) item;
 214
 215     wxCHECK_MSG( !m_isIcon, FALSE, _T("icons not supported in wxStaticBitmap") );
 216
 217     wxBitmap* bitmap = (wxBitmap *)m_image;
 218     if ( !bitmap->Ok() )
 219         return FALSE;
 220
 221     HDC hDC = lpDIS->hDC;
 222     HDC memDC = ::CreateCompatibleDC(hDC);
 223
 224     HBITMAP old = (HBITMAP) ::SelectObject(memDC, (HBITMAP) bitmap->GetHBITMAP());
 225
 226     if (!old)
 227         return FALSE;
 228
 229     int x = lpDIS->rcItem.left;
 230     int y = lpDIS->rcItem.top;
 231     int width = lpDIS->rcItem.right - x;
 232     int height = lpDIS->rcItem.bottom - y;
 233
 234     // Centre the bitmap in the control area
 235     int x1 = (int) (x + ((width - bitmap->GetWidth()) / 2));
 236     int y1 = (int) (y + ((height - bitmap->GetHeight()) / 2));
 237
 238     ::BitBlt(hDC, x1, y1, bitmap->GetWidth(), bitmap->GetHeight(), memDC, 0, 0, SRCCOPY);
 239
 240     ::SelectObject(memDC, old);
 241
 242     ::DeleteDC(memDC);
 243
 244     return TRUE;
 245 }
 246 #endif // Win16
 247
 248 // We need this or the control can never be moved e.g. in Dialog Editor.
 249 long wxStaticBitmap::MSWWindowProc(WXUINT nMsg,
 250                                    WXWPARAM wParam,
 251                                    WXLPARAM lParam)
 252 {
 253     // Ensure that static items get messages. Some controls don't like this
 254     // message to be intercepted (e.g. RichEdit), hence the tests.
 255     if ( nMsg == WM_NCHITTEST )
 256         return (long)HTCLIENT;
 257
 258     return wxWindow::MSWWindowProc(nMsg, wParam, lParam);
 259 }
 260