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1 | ///////////////////////////////////////////////////////////////////////////// |
2 | // Name: erase.cpp | |
3 | // Purpose: Erase wxWindows sample | |
4 | // Author: Robert Roebling | |
5 | // Modified by: | |
6 | // Created: 04/01/98 | |
7 | // RCS-ID: $Id$ | |
8 | // Copyright: (c) Robert Roebling | |
9 | // Licence: wxWindows licence | |
10 | ///////////////////////////////////////////////////////////////////////////// | |
11 | ||
12 | // ============================================================================ | |
13 | // declarations | |
14 | // ============================================================================ | |
15 | ||
16 | // ---------------------------------------------------------------------------- | |
17 | // headers | |
18 | // ---------------------------------------------------------------------------- | |
19 | ||
788233da | 20 | #if defined(__GNUG__) && !defined(__APPLE__) |
4d2c67a9 JS |
21 | #pragma implementation "erase.cpp" |
22 | #pragma interface "erase.cpp" | |
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23 | #endif |
24 | ||
25 | // For compilers that support precompilation, includes "wx/wx.h". | |
26 | #include "wx/wxprec.h" | |
27 | ||
28 | #ifdef __BORLANDC__ | |
29 | #pragma hdrstop | |
30 | #endif | |
31 | ||
32 | // for all others, include the necessary headers (this file is usually all you | |
33 | // need because it includes almost all "standard" wxWindows headers) | |
34 | #ifndef WX_PRECOMP | |
35 | #include "wx/wx.h" | |
36 | #endif | |
37 | ||
38 | // ---------------------------------------------------------------------------- | |
39 | // resources | |
40 | // ---------------------------------------------------------------------------- | |
41 | // the application icon | |
f566b4fe | 42 | #if defined(__WXGTK__) || defined(__WXMOTIF__) || defined(__WXMAC__) || defined(__WXMGL__) || defined(__WXX11__) |
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43 | #include "mondrian.xpm" |
44 | #endif | |
45 | ||
46 | // ---------------------------------------------------------------------------- | |
47 | // private classes | |
48 | // ---------------------------------------------------------------------------- | |
49 | ||
50 | class MyApp : public wxApp | |
51 | { | |
52 | public: | |
53 | virtual bool OnInit(); | |
54 | }; | |
55 | ||
56 | ||
57 | class MyFrame : public wxFrame | |
58 | { | |
59 | public: | |
60 | MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size); | |
61 | ||
62 | void OnQuit(wxCommandEvent& event); | |
63 | void OnAbout(wxCommandEvent& event); | |
64 | ||
65 | private: | |
66 | DECLARE_EVENT_TABLE() | |
67 | }; | |
68 | ||
69 | ||
70 | class MyCanvas : public wxScrolledWindow | |
71 | { | |
72 | public: | |
73 | MyCanvas( MyFrame *parent ); | |
98dd66cf | 74 | |
33611ebb | 75 | void OnPaint( wxPaintEvent &event ); |
2b5f62a0 | 76 | void OnChar( wxKeyEvent &event ); |
33611ebb | 77 | void OnEraseBackground( wxEraseEvent &event ); |
98dd66cf | 78 | |
b5a49d4c | 79 | wxBitmap m_bitmap; |
2b5f62a0 | 80 | wxString m_text; |
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81 | |
82 | private: | |
83 | DECLARE_EVENT_TABLE() | |
84 | }; | |
85 | ||
86 | // ---------------------------------------------------------------------------- | |
87 | // constants | |
88 | // ---------------------------------------------------------------------------- | |
89 | ||
90 | enum | |
91 | { | |
92 | // menu items | |
aec18ff7 | 93 | ID_MENU_QUIT = 1, |
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94 | }; |
95 | ||
96 | ||
97 | // ---------------------------------------------------------------------------- | |
98 | // the application class | |
99 | // ---------------------------------------------------------------------------- | |
100 | ||
101 | IMPLEMENT_APP(MyApp) | |
102 | ||
103 | bool MyApp::OnInit() | |
104 | { | |
aec18ff7 | 105 | MyFrame *frame = new MyFrame(_T("Erase sample"), |
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106 | wxPoint(50, 50), wxSize(450, 340)); |
107 | ||
108 | frame->Show(TRUE); | |
98dd66cf | 109 | |
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110 | return TRUE; |
111 | } | |
112 | ||
113 | // ---------------------------------------------------------------------------- | |
114 | // main frame | |
115 | // ---------------------------------------------------------------------------- | |
116 | ||
117 | BEGIN_EVENT_TABLE(MyFrame, wxFrame) | |
aec18ff7 MB |
118 | EVT_MENU(ID_MENU_QUIT, MyFrame::OnQuit) |
119 | EVT_MENU(wxID_ABOUT, MyFrame::OnAbout) | |
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120 | END_EVENT_TABLE() |
121 | ||
122 | // frame constructor | |
123 | MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size) | |
124 | : wxFrame((wxFrame *)NULL, -1, title, pos, size) | |
125 | { | |
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126 | SetIcon(wxICON(mondrian)); |
127 | ||
ab1ca7b3 | 128 | wxMenu *menuFile = new wxMenu(_T(""), wxMENU_TEAROFF); |
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129 | |
130 | wxMenu *helpMenu = new wxMenu; | |
aec18ff7 | 131 | helpMenu->Append(wxID_ABOUT, _T("&About...\tCtrl-A"), _T("Show about dialog")); |
33611ebb | 132 | |
aec18ff7 | 133 | menuFile->Append(ID_MENU_QUIT, _T("E&xit\tAlt-X"), _T("Quit this program")); |
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134 | |
135 | wxMenuBar *menuBar = new wxMenuBar(); | |
98dd66cf VZ |
136 | menuBar->Append(menuFile, _T("&File")); |
137 | menuBar->Append(helpMenu, _T("&Help")); | |
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138 | |
139 | SetMenuBar(menuBar); | |
140 | ||
141 | #if wxUSE_STATUSBAR | |
142 | // create a status bar just for fun (by default with 1 pane only) | |
143 | CreateStatusBar(2); | |
98dd66cf | 144 | SetStatusText(_T("Welcome to wxWindows erase sample!")); |
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145 | #endif // wxUSE_STATUSBAR |
146 | ||
147 | (void)new MyCanvas( this ); | |
148 | } | |
149 | ||
150 | ||
151 | void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event)) | |
152 | { | |
153 | Close(TRUE); | |
154 | } | |
155 | ||
156 | void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event)) | |
157 | { | |
98dd66cf VZ |
158 | wxMessageBox(_T("This sample shows how you can draw custom background."), |
159 | _T("About Erase Sample"), wxOK | wxICON_INFORMATION, this); | |
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160 | } |
161 | ||
162 | ||
163 | BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow) | |
164 | EVT_PAINT( MyCanvas::OnPaint) | |
2b5f62a0 | 165 | EVT_CHAR( MyCanvas::OnChar) |
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166 | EVT_ERASE_BACKGROUND( MyCanvas::OnEraseBackground) |
167 | END_EVENT_TABLE() | |
168 | ||
169 | MyCanvas::MyCanvas( MyFrame *parent ) | |
98dd66cf VZ |
170 | : wxScrolledWindow( parent, -1, wxDefaultPosition, wxDefaultSize, |
171 | wxScrolledWindowStyle | | |
172 | wxNO_FULL_REPAINT_ON_RESIZE| | |
173 | wxSUNKEN_BORDER ) | |
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174 | { |
175 | SetScrollbars( 10, 10, 40, 100, 0, 0 ); | |
98dd66cf VZ |
176 | |
177 | m_bitmap = wxBitmap( wxICON(mondrian) ); | |
178 | ||
b5a49d4c | 179 | new wxStaticBitmap( this, -1, m_bitmap, wxPoint(80,20) ); |
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180 | } |
181 | ||
2b5f62a0 VZ |
182 | void MyCanvas::OnChar( wxKeyEvent &event ) |
183 | { | |
184 | #if wxUSE_UNICODE | |
185 | if (event.m_uniChar) | |
186 | { | |
187 | m_text += event.m_uniChar; | |
188 | Refresh(); | |
189 | return; | |
190 | } | |
191 | #endif | |
192 | ||
193 | // some test cases | |
194 | switch (event.m_keyCode) | |
195 | { | |
196 | case WXK_UP: m_text += wxT( "<UP>" ); break; | |
197 | case WXK_LEFT: m_text += wxT( "<LEFT>" ); break; | |
198 | case WXK_RIGHT: m_text += wxT( "<RIGHT>" ); break; | |
199 | case WXK_DOWN: m_text += wxT( "<DOWN>" ); break; | |
200 | case WXK_RETURN: m_text += wxT( "<ENTER>" ); break; | |
201 | default: m_text += event.m_keyCode; break; | |
202 | } | |
203 | ||
204 | } | |
205 | ||
87728739 | 206 | void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) ) |
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207 | { |
208 | wxPaintDC dc(this); | |
209 | PrepareDC( dc ); | |
98dd66cf | 210 | |
b5a49d4c RR |
211 | dc.SetBrush( *wxBLACK_BRUSH ); |
212 | dc.DrawRectangle( 0,0,200,50 ); | |
98dd66cf | 213 | |
b5a49d4c | 214 | dc.DrawBitmap( m_bitmap, 10, 20, TRUE ); |
98dd66cf VZ |
215 | |
216 | dc.SetTextForeground(*wxBLUE); | |
217 | dc.DrawText(_T("This text is drawn from OnPaint"), 65, 65); | |
2b5f62a0 VZ |
218 | |
219 | wxString tmp; | |
220 | tmp.Printf( _T("Hit any key to display more text: %s"), m_text.c_str() ); | |
221 | int w,h; | |
222 | dc.GetTextExtent( tmp, &w, &h ); | |
223 | dc.SetBrush( *wxWHITE_BRUSH ); | |
224 | dc.DrawRectangle( 65, 85, w, h ); | |
225 | dc.DrawText( tmp, 65, 85 ); | |
98dd66cf VZ |
226 | |
227 | #if 0 | |
e88be8c9 RR |
228 | wxRegionIterator upd( GetUpdateRegion() ); |
229 | while (upd) | |
230 | { | |
ab1ca7b3 | 231 | wxLogDebug( _T("Paint: %d %d %d %d"), upd.GetX(), upd.GetY(), upd.GetWidth(), upd.GetHeight() ); |
e88be8c9 RR |
232 | upd ++; |
233 | } | |
f809133f RR |
234 | #endif |
235 | ||
236 | #if 0 | |
237 | wxSize size = GetSize(); | |
238 | wxSize client_size = GetClientSize(); | |
ab1ca7b3 | 239 | wxLogDebug( _T("size %d %d client_size %d %d"), size.x, size.y, client_size.x, client_size.y ); |
f809133f | 240 | #endif |
2f6c54eb | 241 | |
98dd66cf | 242 | #if 0 |
2f6c54eb | 243 | int i; |
e88be8c9 | 244 | dc.SetPen( *wxWHITE_PEN ); |
2f6c54eb | 245 | for (i = 0; i < 20; i += 2) |
e88be8c9 | 246 | dc.DrawLine( i,i, i+100,i ); |
98dd66cf | 247 | |
f809133f | 248 | dc.SetPen( *wxWHITE_PEN ); |
2f6c54eb | 249 | for (i = 200; i < 220; i += 2) |
f809133f | 250 | dc.DrawLine( i-200,i, i-100,i ); |
98dd66cf | 251 | |
f566b4fe RR |
252 | wxRegion region( 110, 110, 80, 80 ); |
253 | wxRegion hole( 130, 130, 40, 1 ); | |
254 | region.Intersect( hole ); | |
255 | dc.SetClippingRegion( region ); | |
98dd66cf | 256 | |
33611ebb | 257 | dc.SetBrush( *wxRED_BRUSH ); |
f566b4fe | 258 | dc.DrawRectangle( 100, 100, 200, 200 ); |
98dd66cf | 259 | |
e88be8c9 | 260 | dc.DestroyClippingRegion(); |
887dd52f RR |
261 | |
262 | dc.SetPen( *wxTRANSPARENT_PEN ); | |
98dd66cf | 263 | |
887dd52f RR |
264 | wxRegion strip( 110, 200, 30, 1 ); |
265 | wxRegionIterator it( strip ); | |
266 | while (it) | |
267 | { | |
268 | dc.DrawRectangle( it.GetX(), it.GetY(), it.GetWidth(), it.GetHeight() ); | |
269 | it ++; | |
270 | } | |
98dd66cf | 271 | #endif // 0 |
33611ebb RR |
272 | } |
273 | ||
98dd66cf | 274 | void MyCanvas::OnEraseBackground( wxEraseEvent& event ) |
33611ebb | 275 | { |
98dd66cf VZ |
276 | wxDC& dc = *event.GetDC(); |
277 | dc.SetPen(*wxGREEN_PEN); | |
278 | ||
279 | // this line is needed, otherwise the junk is left on win the background | |
280 | dc.Clear(); | |
281 | ||
282 | wxSize size = GetClientSize(); | |
283 | for ( int x = 0; x < size.x; x+= 10 ) | |
284 | { | |
285 | dc.DrawLine(x, 0, x, size.y); | |
286 | } | |
287 | ||
288 | for ( int y = 0; y < size.y; y+= 10 ) | |
289 | { | |
290 | dc.DrawLine(0, y, size.x, y); | |
291 | } | |
292 | ||
293 | dc.SetTextForeground(*wxRED); | |
294 | dc.DrawText(_T("This text is drawn from OnEraseBackground"), 60, 60); | |
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295 | } |
296 |