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
  89 #ifdef __WIN16__
  90     wxASSERT_MSG( !m_isIcon, "Icons are not supported in wxStaticBitmap under WIN16." );
  91 #endif
  92
  93 #ifndef __WIN16__
  94     if ( !m_isIcon )
  95     {
  96         const wxBitmap& bmp = (const wxBitmap&)bitmap;
  97         wxMask *mask = bmp.GetMask();
  98         if ( mask && mask->GetMaskBitmap() )
  99         {
 100             icon = new wxIcon;
 101             icon->CopyFromBitmap(bmp);
 102
 103             m_isIcon = TRUE;
 104         }
 105     }
 106 #endif
 107
 108 #ifdef __WIN32__
 109     // create a static control with either SS_BITMAP or SS_ICON style depending
 110     // on what we have here
 111     const wxChar *classname = wxT("STATIC");
 112     int winstyle = m_isIcon ? SS_ICON : SS_BITMAP;
 113 #else // Win16
 114     const wxChar *classname = wxT("BUTTON");
 115     int winstyle = BS_OWNERDRAW;
 116 #endif // Win32
 117
 118     if ( m_windowStyle & wxCLIP_SIBLINGS )
 119         winstyle |= WS_CLIPSIBLINGS;
 120
 121
 122     m_hWnd = (WXHWND)::CreateWindow
 123                        (
 124                         classname,
 125                         wxT(""),
 126                         // NOT DISABLED!!! We want to move it in Dialog Editor.
 127                         winstyle | WS_CHILD | WS_VISIBLE /* | WS_CLIPSIBLINGS */ , // | WS_DISABLED,
 128                         0, 0, 0, 0,
 129                         (HWND)parent->GetHWND(),
 130                         (HMENU)m_windowId,
 131                         wxGetInstance(),
 132                         NULL
 133                        );
 134
 135     wxCHECK_MSG( m_hWnd, FALSE, wxT("Failed to create static bitmap") );
 136
 137     SetImage(icon ? icon : &bitmap);
 138     delete icon; // may be NULL, ok
 139
 140     // Subclass again for purposes of dialog editing mode
 141     SubclassWin(m_hWnd);
 142
 143     SetFont(GetParent()->GetFont());
 144
 145     SetSize(x, y, width, height);
 146
 147     return TRUE;
 148 }
 149
 150 bool wxStaticBitmap::ImageIsOk() const
 151 {
 152     return m_image && m_image->Ok();
 153 }
 154
 155 void wxStaticBitmap::Free()
 156 {
 157     delete m_image;
 158
 159     m_image = NULL;
 160 }
 161
 162 wxSize wxStaticBitmap::DoGetBestSize() const
 163 {
 164     // reuse the current size (as wxWindow does) instead of using some
 165     // arbitrary default size (as wxControl, our immediate base class, does)
 166     return wxWindow::DoGetBestSize();
 167 }
 168
 169 void wxStaticBitmap::SetImage(const wxGDIImage* image)
 170 {
 171     Free();
 172
 173     const wxIcon *icon = wxDynamicCast(image, wxIcon);
 174     m_isIcon = icon != NULL;
 175     if ( m_isIcon )
 176     {
 177         m_image = new wxIcon(*icon);
 178     }
 179     else
 180     {
 181         wxASSERT_MSG( wxDynamicCast(image, wxBitmap),
 182                       _T("not an icon and not a bitmap?") );
 183
 184         const wxBitmap *bitmap = (wxBitmap *)image;
 185
 186         m_image = new wxBitmap(*bitmap);
 187     }
 188
 189     int x, y;
 190     int w, h;
 191     GetPosition(&x, &y);
 192     GetSize(&w, &h);
 193
 194 #ifdef __WIN32__
 195     HANDLE handle = (HANDLE)m_image->GetHandle();
 196     ::SendMessage(GetHwnd(), STM_SETIMAGE,
 197                   m_isIcon ? IMAGE_ICON : IMAGE_BITMAP, (LPARAM)handle);
 198 #endif // Win32
 199
 200     if ( ImageIsOk() )
 201     {
 202         int width = image->GetWidth(),
 203             height = image->GetHeight();
 204         if ( width && height )
 205         {
 206             w = width;
 207             h = height;
 208
 209             ::MoveWindow(GetHwnd(), x, y, width, height, FALSE);
 210         }
 211     }
 212
 213     RECT rect;
 214     rect.left   = x;
 215     rect.top    = y;
 216     rect.right  = x + w;
 217     rect.bottom = y + h;
 218     InvalidateRect(GetHwndOf(GetParent()), &rect, TRUE);
 219 }
 220
 221 // under Win32 we use the standard static control style for this
 222 #ifdef __WIN16__
 223 bool wxStaticBitmap::MSWOnDraw(WXDRAWITEMSTRUCT *item)
 224 {
 225     LPDRAWITEMSTRUCT lpDIS = (LPDRAWITEMSTRUCT) item;
 226
 227     wxCHECK_MSG( !m_isIcon, FALSE, _T("icons not supported in wxStaticBitmap") );
 228
 229     wxBitmap* bitmap = (wxBitmap *)m_image;
 230     if ( !bitmap->Ok() )
 231         return FALSE;
 232
 233     HDC hDC = lpDIS->hDC;
 234     HDC memDC = ::CreateCompatibleDC(hDC);
 235
 236     HBITMAP old = (HBITMAP) ::SelectObject(memDC, (HBITMAP) bitmap->GetHBITMAP());
 237
 238     if (!old)
 239         return FALSE;
 240
 241     int x = lpDIS->rcItem.left;
 242     int y = lpDIS->rcItem.top;
 243     int width = lpDIS->rcItem.right - x;
 244     int height = lpDIS->rcItem.bottom - y;
 245
 246     // Centre the bitmap in the control area
 247     int x1 = (int) (x + ((width - bitmap->GetWidth()) / 2));
 248     int y1 = (int) (y + ((height - bitmap->GetHeight()) / 2));
 249
 250     ::BitBlt(hDC, x1, y1, bitmap->GetWidth(), bitmap->GetHeight(), memDC, 0, 0, SRCCOPY);
 251
 252     ::SelectObject(memDC, old);
 253
 254     ::DeleteDC(memDC);
 255
 256     return TRUE;
 257 }
 258 #endif // Win16
 259
 260 // We need this or the control can never be moved e.g. in Dialog Editor.
 261 long wxStaticBitmap::MSWWindowProc(WXUINT nMsg,
 262                                    WXWPARAM wParam,
 263                                    WXLPARAM lParam)
 264 {
 265     // Ensure that static items get messages. Some controls don't like this
 266     // message to be intercepted (e.g. RichEdit), hence the tests.
 267     if ( nMsg == WM_NCHITTEST )
 268         return (long)HTCLIENT;
 269
 270     return wxWindow::MSWWindowProc(nMsg, wParam, lParam);
 271 }
 272