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     m_isIcon = bitmap.IsKindOf(CLASSINFO(wxIcon));
  84
  85 #ifdef __WIN32__
  86     // create a static control with either SS_BITMAP or SS_ICON style depending
  87     // on what we have here
  88     const wxChar *classname = wxT("STATIC");
  89     int winstyle = m_isIcon ? SS_ICON : SS_BITMAP;
  90 #else // Win16
  91     const wxChar *classname = wxT("BUTTON");
  92     int winstyle = BS_OWNERDRAW;
  93 #endif // Win32
  94
  95     m_hWnd = (WXHWND)::CreateWindow
  96                        (
  97                         classname,
  98                         wxT(""),
  99                         winstyle | WS_CHILD | WS_VISIBLE,
 100                         0, 0, 0, 0,
 101                         (HWND)parent->GetHWND(),
 102                         (HMENU)m_windowId,
 103                         wxGetInstance(),
 104                         NULL
 105                        );
 106
 107     wxCHECK_MSG( m_hWnd, FALSE, wxT("Failed to create static bitmap") );
 108
 109     SetImage(bitmap);
 110
 111     // Subclass again for purposes of dialog editing mode
 112     SubclassWin(m_hWnd);
 113
 114     SetFont(GetParent()->GetFont());
 115
 116     SetSize(x, y, width, height);
 117
 118     return TRUE;
 119 }
 120
 121 bool wxStaticBitmap::ImageIsOk() const
 122 {
 123     return m_image && m_image->Ok();
 124 }
 125
 126 void wxStaticBitmap::Free()
 127 {
 128     delete m_image;
 129
 130     m_image = NULL;
 131 }
 132
 133 wxSize wxStaticBitmap::DoGetBestSize() const
 134 {
 135     // reuse the current size (as wxWindow does) instead of using some
 136     // arbitrary default size (as wxControl, our immediate base class, does)
 137     return wxWindow::DoGetBestSize();
 138 }
 139
 140 void wxStaticBitmap::SetImage(const wxGDIImage& bitmap)
 141 {
 142     Free();
 143
 144     m_isIcon = bitmap.IsKindOf(CLASSINFO(wxIcon));
 145     if ( m_isIcon )
 146         m_image = new wxIcon((const wxIcon&)bitmap);
 147     else
 148         m_image = new wxBitmap((const wxBitmap &)bitmap);
 149
 150     int x, y;
 151     int w, h;
 152     GetPosition(&x, &y);
 153     GetSize(&w, &h);
 154
 155 #ifdef __WIN32__
 156     HANDLE handle = (HANDLE)m_image->GetHandle();
 157     ::SendMessage(GetHwnd(), STM_SETIMAGE,
 158                   m_isIcon ? IMAGE_ICON : IMAGE_BITMAP, (LPARAM)handle);
 159 #endif // Win32
 160
 161     if ( ImageIsOk() )
 162     {
 163         int width = bitmap.GetWidth(),
 164             height = bitmap.GetHeight();
 165         if ( width && height )
 166         {
 167             w = width;
 168             h = height;
 169
 170             ::MoveWindow(GetHwnd(), x, y, width, height, FALSE);
 171         }
 172     }
 173
 174     RECT rect;
 175     rect.left   = x;
 176     rect.top    = y;
 177     rect.right  = x + w;
 178     rect.bottom = y + h;
 179     InvalidateRect(GetHwndOf(GetParent()), &rect, TRUE);
 180 }
 181
 182 // under Win32 we use the standard static control style for this
 183 #ifdef __WIN16__
 184 bool wxStaticBitmap::MSWOnDraw(WXDRAWITEMSTRUCT *item)
 185 {
 186     LPDRAWITEMSTRUCT lpDIS = (LPDRAWITEMSTRUCT) item;
 187
 188     wxCHECK_MSG( !m_isIcon, FALSE, _T("icons not supported in wxStaticBitmap") );
 189
 190     wxBitmap* bitmap = (wxBitmap *)m_image;
 191     if ( !bitmap->Ok() )
 192         return FALSE;
 193
 194     HDC hDC = lpDIS->hDC;
 195     HDC memDC = ::CreateCompatibleDC(hDC);
 196
 197     HBITMAP old = (HBITMAP) ::SelectObject(memDC, (HBITMAP) bitmap->GetHBITMAP());
 198
 199     if (!old)
 200         return FALSE;
 201
 202     int x = lpDIS->rcItem.left;
 203     int y = lpDIS->rcItem.top;
 204     int width = lpDIS->rcItem.right - x;
 205     int height = lpDIS->rcItem.bottom - y;
 206
 207     // Centre the bitmap in the control area
 208     int x1 = (int) (x + ((width - bitmap->GetWidth()) / 2));
 209     int y1 = (int) (y + ((height - bitmap->GetHeight()) / 2));
 210
 211     ::BitBlt(hDC, x1, y1, bitmap->GetWidth(), bitmap->GetHeight(), memDC, 0, 0, SRCCOPY);
 212
 213     ::SelectObject(memDC, old);
 214
 215     ::DeleteDC(memDC);
 216
 217     return TRUE;
 218 }
 219 #endif // Win16
 220
 221 // We need this or the control can never be moved e.g. in Dialog Editor.
 222 long wxStaticBitmap::MSWWindowProc(WXUINT nMsg,
 223                                    WXWPARAM wParam,
 224                                    WXLPARAM lParam)
 225 {
 226     // Ensure that static items get messages. Some controls don't like this
 227     // message to be intercepted (e.g. RichEdit), hence the tests.
 228     if ( nMsg == WM_NCHITTEST )
 229         return (long)HTCLIENT;
 230
 231     return wxWindow::MSWWindowProc(nMsg, wParam, lParam);
 232 }
 233