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1 /////////////////////////////////////////////////////////////////////////////
2 // Name: src/msw/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
9 // Licence: wxWindows licence
10 /////////////////////////////////////////////////////////////////////////////
11
12 // ===========================================================================
13 // declarations
14 // ===========================================================================
15
16 // ---------------------------------------------------------------------------
17 // headers
18 // ---------------------------------------------------------------------------
19
20 // For compilers that support precompilation, includes "wx.h".
21 #include "wx/wxprec.h"
22
23 #ifdef __BORLANDC__
24 #pragma hdrstop
25 #endif
26
27 #if wxUSE_STATBMP
28
29 #include "wx/statbmp.h"
30
31 #ifndef WX_PRECOMP
32 #include "wx/app.h"
33 #include "wx/window.h"
34 #include "wx/icon.h"
35 #include "wx/dcclient.h"
36 #endif
37
38 #include "wx/msw/private.h"
39
40 #include "wx/sysopt.h"
41
42 #include <stdio.h>
43
44 // ---------------------------------------------------------------------------
45 // macors
46 // ---------------------------------------------------------------------------
47
48 // ===========================================================================
49 // implementation
50 // ===========================================================================
51
52 // ---------------------------------------------------------------------------
53 // wxStaticBitmap
54 // ---------------------------------------------------------------------------
55
56 // we may have either bitmap or icon: if a bitmap with mask is passed, we
57 // will transform it to an icon ourselves because otherwise the mask will
58 // be ignored by Windows
59 // note that this function will create a new object every time
60 // it is called even if the image needs no conversion
61
62 static wxGDIImage* ConvertImage( const wxGDIImage& bitmap )
63 {
64 bool isIcon = bitmap.IsKindOf( wxCLASSINFO(wxIcon) );
65
66 if( !isIcon )
67 {
68 wxASSERT_MSG( wxDynamicCast(&bitmap, wxBitmap),
69 wxT("not an icon and not a bitmap?") );
70
71 const wxBitmap& bmp = (const wxBitmap&)bitmap;
72 wxMask *mask = bmp.GetMask();
73 if ( mask && mask->GetMaskBitmap() )
74 {
75 wxIcon* icon = new wxIcon;
76 icon->CopyFromBitmap(bmp);
77
78 return icon;
79 }
80
81 return new wxBitmap( bmp );
82 }
83
84 // copying a bitmap is a cheap operation
85 return new wxIcon( (const wxIcon&)bitmap );
86 }
87
88 bool wxStaticBitmap::Create(wxWindow *parent,
89 wxWindowID id,
90 const wxGDIImage& bitmap,
91 const wxPoint& pos,
92 const wxSize& size,
93 long style,
94 const wxString& name)
95 {
96 if ( !CreateControl(parent, id, pos, size, style, wxDefaultValidator, name) )
97 return false;
98
99 // we may have either bitmap or icon: if a bitmap with mask is passed, we
100 // will transform it to an icon ourselves because otherwise the mask will
101 // be ignored by Windows
102 m_isIcon = bitmap.IsKindOf(wxCLASSINFO(wxIcon));
103
104 wxGDIImage *image = ConvertImage( bitmap );
105 m_isIcon = image->IsKindOf( wxCLASSINFO(wxIcon) );
106
107 // create the native control
108 if ( !MSWCreateControl(wxT("STATIC"), wxEmptyString, pos, size) )
109 {
110 // control creation failed
111 return false;
112 }
113
114 // no need to delete the new image
115 SetImageNoCopy(image);
116
117 // GetBestSize will work properly now, so set the best size if needed
118 SetInitialSize(size);
119
120 // painting manually is reported not to work under Windows CE (see #10093),
121 // so don't do it there even if this probably means that alpha is not
122 // supported there -- but at least bitmaps without alpha appear correctly
123 #ifndef __WXWINCE__
124 // Windows versions before XP (and even XP if the application has no
125 // manifest and so the old comctl32.dll is used) don't draw correctly the
126 // images with alpha channel so we need to draw them ourselves and it's
127 // easier to just always do it rather than check if we have an image with
128 // alpha or not
129 if ( wxTheApp->GetComCtl32Version() < 600 )
130 {
131 Connect(wxEVT_PAINT, wxPaintEventHandler(wxStaticBitmap::DoPaintManually));
132 }
133 #endif // !__WXWINCE__
134
135 return true;
136 }
137
138 WXDWORD wxStaticBitmap::MSWGetStyle(long style, WXDWORD *exstyle) const
139 {
140 WXDWORD msStyle = wxControl::MSWGetStyle(style, exstyle);
141
142 // what kind of control are we?
143 msStyle |= m_isIcon ? SS_ICON : SS_BITMAP;
144
145 // we use SS_CENTERIMAGE to prevent the control from resizing the bitmap to
146 // fit to its size -- this is unexpected and doesn't happen in other ports
147 //
148 // and SS_NOTIFY is necessary to receive mouse events
149 msStyle |= SS_CENTERIMAGE | SS_NOTIFY;
150
151 return msStyle;
152 }
153
154 bool wxStaticBitmap::ImageIsOk() const
155 {
156 return m_image && m_image->IsOk();
157 }
158
159 wxIcon wxStaticBitmap::GetIcon() const
160 {
161 wxCHECK_MSG( m_image, wxIcon(), wxT("no image in wxStaticBitmap") );
162
163 // we can't ask for an icon if all we have is a bitmap
164 wxCHECK_MSG( m_isIcon, wxIcon(), wxT("no icon in this wxStaticBitmap") );
165
166 return *(wxIcon *)m_image;
167 }
168
169 wxBitmap wxStaticBitmap::GetBitmap() const
170 {
171 if ( m_isIcon )
172 {
173 // don't fail because we might have replaced the bitmap with icon
174 // ourselves internally in ConvertImage() to keep the transparency but
175 // the user code doesn't know about it so it still can use GetBitmap()
176 // to retrieve the bitmap
177 return wxBitmap(GetIcon());
178 }
179 else // we have a bitmap
180 {
181 wxCHECK_MSG( m_image, wxBitmap(), wxT("no image in wxStaticBitmap") );
182
183 return *(wxBitmap *)m_image;
184 }
185 }
186
187 void wxStaticBitmap::Free()
188 {
189 wxDELETE(m_image);
190 }
191
192 wxSize wxStaticBitmap::DoGetBestClientSize() const
193 {
194 wxSize size;
195 if ( ImageIsOk() )
196 {
197 size = m_image->GetSize();
198 }
199 else // No image yet
200 {
201 // this is completely arbitrary
202 size.x =
203 size.y = 16;
204 }
205
206 return size;
207 }
208
209 #ifndef __WXWINCE__
210
211 void wxStaticBitmap::DoPaintManually(wxPaintEvent& WXUNUSED(event))
212 {
213 wxPaintDC dc(this);
214
215 const wxSize size(GetSize());
216 const wxBitmap bmp(GetBitmap());
217
218 // Clear the background: notice that we're supposed to be transparent, so
219 // use the parent background colour if we don't have our own instead of
220 // falling back to the default
221 const wxWindow *win = UseBgCol() ? this : GetParent();
222 dc.SetBrush(win->GetBackgroundColour());
223 dc.SetPen(*wxTRANSPARENT_PEN);
224 dc.DrawRectangle(0, 0, size.GetWidth(), size.GetHeight());
225
226 // Draw the image in the middle
227 dc.DrawBitmap(bmp,
228 (size.GetWidth() - bmp.GetWidth()) / 2,
229 (size.GetHeight() - bmp.GetHeight()) / 2,
230 true /* use mask */);
231 }
232
233 #endif // !__WXWINCE__
234
235 void wxStaticBitmap::SetImage( const wxGDIImage* image )
236 {
237 wxGDIImage* convertedImage = ConvertImage( *image );
238 SetImageNoCopy( convertedImage );
239 }
240
241 void wxStaticBitmap::SetImageNoCopy( wxGDIImage* image)
242 {
243 Free();
244 InvalidateBestSize();
245
246 m_isIcon = image->IsKindOf( wxCLASSINFO(wxIcon) );
247 // the image has already been copied
248 m_image = image;
249
250 int x, y;
251 int w, h;
252 GetPosition(&x, &y);
253 GetSize(&w, &h);
254
255 #ifdef __WIN32__
256 HANDLE handle = (HANDLE)m_image->GetHandle();
257 LONG style = ::GetWindowLong( (HWND)GetHWND(), GWL_STYLE ) ;
258 ::SetWindowLong( (HWND)GetHWND(), GWL_STYLE, ( style & ~( SS_BITMAP|SS_ICON ) ) |
259 ( m_isIcon ? SS_ICON : SS_BITMAP ) );
260 HGDIOBJ oldHandle = (HGDIOBJ)::SendMessage(GetHwnd(), STM_SETIMAGE,
261 m_isIcon ? IMAGE_ICON : IMAGE_BITMAP, (LPARAM)handle);
262 // detect if this is still the handle we passed before or
263 // if the static-control made a copy of the bitmap!
264 if (m_currentHandle != 0 && oldHandle != (HGDIOBJ) m_currentHandle)
265 {
266 // the static control made a copy and we are responsible for deleting it
267 DeleteObject((HGDIOBJ) oldHandle);
268 }
269 m_currentHandle = (WXHANDLE)handle;
270 #endif // Win32
271
272 if ( ImageIsOk() )
273 {
274 int width = image->GetWidth(),
275 height = image->GetHeight();
276 if ( width && height )
277 {
278 w = width;
279 h = height;
280
281 ::MoveWindow(GetHwnd(), x, y, width, height, FALSE);
282 }
283 }
284
285 RECT rect;
286 rect.left = x;
287 rect.top = y;
288 rect.right = x + w;
289 rect.bottom = y + h;
290 ::InvalidateRect(GetHwndOf(GetParent()), &rect, TRUE);
291 }
292
293 #endif // wxUSE_STATBMP