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1 /*
2 * Program: scroll
3 *
4 * Author: Robert Roebling
5 *
6 * Copyright: (C) 1998, Robert Roebling
7 *
8 */
9
10 // For compilers that support precompilation, includes "wx/wx.h".
11 #include "wx/wxprec.h"
12
13 #ifdef __BORLANDC__
14 #pragma hdrstop
15 #endif
16
17 #ifndef WX_PRECOMP
18 #include "wx/wx.h"
19 #endif
20
21 #include "wx/image.h"
22 #include "wx/listctrl.h"
23 #include "wx/sizer.h"
24 #include "wx/log.h"
25
26
27 // derived classes
28
29 class MyFrame;
30 class MyApp;
31
32 // MyCanvas
33
34 class MyCanvas: public wxScrolledWindow
35 {
36 public:
37 MyCanvas() {}
38 MyCanvas( wxWindow *parent, wxWindowID, const wxPoint &pos, const wxSize &size );
39 ~MyCanvas();
40 void OnPaint( wxPaintEvent &event );
41 void OnQueryPosition( wxCommandEvent &event );
42 void OnAddButton( wxCommandEvent &event );
43 void OnDeleteButton( wxCommandEvent &event );
44 void OnMoveButton( wxCommandEvent &event );
45 void OnScrollWin( wxCommandEvent &event );
46 void OnMouseDown( wxMouseEvent &event );
47
48 wxButton *m_button;
49
50 DECLARE_DYNAMIC_CLASS(MyCanvas)
51 DECLARE_EVENT_TABLE()
52 };
53
54 // ----------------------------------------------------------------------------
55 // MyScrolledWindow classes: examples of wxScrolledWindow usage
56 // ----------------------------------------------------------------------------
57
58 // base class for both of them
59 class MyScrolledWindowBase : public wxScrolledWindow
60 {
61 public:
62 MyScrolledWindowBase(wxWindow *parent) : wxScrolledWindow(parent)
63 {
64 m_nLines = 100;
65
66 InitScrollbars();
67 }
68
69 protected:
70 // set the scrollbar params
71 void InitScrollbars();
72
73 // the height of one line on screen
74 wxCoord m_hLine;
75
76 // the number of lines we draw
77 size_t m_nLines;
78 };
79
80 // this class does "stupid" redrawing - it redraws everything each time
81 class MyScrolledWindowDumb : public MyScrolledWindowBase
82 {
83 public:
84 MyScrolledWindowDumb(wxWindow *parent) : MyScrolledWindowBase(parent) { }
85
86 virtual void OnDraw(wxDC& dc);
87 };
88
89 // this class does "smart" redrawing - only redraws the lines which must be
90 // redrawn
91 class MyScrolledWindowSmart : public MyScrolledWindowBase
92 {
93 public:
94 MyScrolledWindowSmart(wxWindow *parent) : MyScrolledWindowBase(parent) { }
95
96 virtual void OnDraw(wxDC& dc);
97 };
98
99 // ----------------------------------------------------------------------------
100 // MyFrame
101 // ----------------------------------------------------------------------------
102
103 class MyFrame: public wxFrame
104 {
105 public:
106 MyFrame();
107
108 void OnAbout( wxCommandEvent &event );
109 void OnQuit( wxCommandEvent &event );
110 void OnDeleteAll( wxCommandEvent &event );
111 void OnInsertNew( wxCommandEvent &event );
112
113 MyCanvas *m_canvas;
114 wxTextCtrl *m_log;
115
116 DECLARE_DYNAMIC_CLASS(MyFrame)
117 DECLARE_EVENT_TABLE()
118 };
119
120 // MyApp
121
122 class MyApp: public wxApp
123 {
124 public:
125 virtual bool OnInit();
126 };
127
128 // main program
129
130 IMPLEMENT_APP(MyApp)
131
132 // ids
133
134 #define ID_ADDBUTTON 1
135 #define ID_DELBUTTON 2
136 #define ID_MOVEBUTTON 3
137 #define ID_SCROLLWIN 4
138 #define ID_QUERYPOS 5
139
140 #define ID_NEWBUTTON 10
141
142 // MyCanvas
143
144 IMPLEMENT_DYNAMIC_CLASS(MyCanvas, wxScrolledWindow)
145
146 BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow)
147 EVT_PAINT( MyCanvas::OnPaint)
148 EVT_MOUSE_EVENTS( MyCanvas::OnMouseDown)
149 EVT_BUTTON( ID_QUERYPOS, MyCanvas::OnQueryPosition)
150 EVT_BUTTON( ID_ADDBUTTON, MyCanvas::OnAddButton)
151 EVT_BUTTON( ID_DELBUTTON, MyCanvas::OnDeleteButton)
152 EVT_BUTTON( ID_MOVEBUTTON, MyCanvas::OnMoveButton)
153 EVT_BUTTON( ID_SCROLLWIN, MyCanvas::OnScrollWin)
154 END_EVENT_TABLE()
155
156 MyCanvas::MyCanvas( wxWindow *parent, wxWindowID id,
157 const wxPoint &pos, const wxSize &size )
158 : wxScrolledWindow( parent, id, pos, size, wxSUNKEN_BORDER | wxTAB_TRAVERSAL, "test canvas" )
159 {
160 (void) new wxButton( this, ID_ADDBUTTON, "add button", wxPoint(10,10) );
161 (void) new wxButton( this, ID_DELBUTTON, "del button", wxPoint(10,40) );
162 (void) new wxButton( this, ID_MOVEBUTTON, "move button", wxPoint(150,10) );
163 (void) new wxButton( this, ID_SCROLLWIN, "scroll win", wxPoint(250,10) );
164
165 #if 0
166
167 wxString choices[] =
168 {
169 "This",
170 "is one of my",
171 "really",
172 "wonderful",
173 "examples."
174 };
175
176 m_button = new wxButton( this, ID_QUERYPOS, "Query position", wxPoint(10,110) );
177
178 (void) new wxTextCtrl( this, -1, "wxTextCtrl", wxPoint(10,150), wxSize(80,-1) );
179
180 (void) new wxRadioButton( this, -1, "Disable", wxPoint(10,190) );
181
182 (void) new wxComboBox( this, -1, "This", wxPoint(10,230), wxDefaultSize, 5, choices );
183
184 (void) new wxRadioBox( this, -1, "This", wxPoint(10,310), wxDefaultSize, 5, choices, 2, wxRA_SPECIFY_COLS );
185
186 (void) new wxRadioBox( this, -1, "This", wxPoint(10,440), wxDefaultSize, 5, choices, 2, wxRA_SPECIFY_ROWS );
187
188 wxListCtrl *m_listCtrl = new wxListCtrl(
189 this, -1, wxPoint(200, 110), wxSize(180, 120),
190 wxLC_REPORT | wxSIMPLE_BORDER | wxLC_SINGLE_SEL );
191
192 m_listCtrl->InsertColumn(0, "First", wxLIST_FORMAT_LEFT, 90);
193 m_listCtrl->InsertColumn(1, "Last", wxLIST_FORMAT_LEFT, 90);
194
195 for ( int i=0; i < 30; i++)
196 {
197 char buf[20];
198 sprintf(buf, "Item %d", i);
199 m_listCtrl->InsertItem(i, buf);
200 }
201 m_listCtrl->SetItemState( 3, wxLIST_STATE_SELECTED, wxLIST_STATE_SELECTED );
202
203 (void) new wxListBox( this, -1, wxPoint(260,280), wxSize(120,120), 5, choices, wxLB_ALWAYS_SB );
204
205 #endif
206
207 wxPanel *test = new wxPanel( this, -1, wxPoint(10, 110), wxSize(130,50), wxSIMPLE_BORDER | wxTAB_TRAVERSAL );
208 test->SetBackgroundColour( wxT("WHEAT") );
209
210 #if 0
211
212 wxButton *test2 = new wxButton( test, -1, "Hallo", wxPoint(10,10) );
213
214 test = new wxPanel( this, -1, wxPoint(160, 530), wxSize(130,120), wxSUNKEN_BORDER | wxTAB_TRAVERSAL );
215 test->SetBackgroundColour( wxT("WHEAT") );
216 test->SetCursor( wxCursor( wxCURSOR_NO_ENTRY ) );
217 test2 = new wxButton( test, -1, "Hallo", wxPoint(10,10) );
218 test2->SetCursor( wxCursor( wxCURSOR_PENCIL ) );
219
220 test = new wxPanel( this, -1, wxPoint(310, 530), wxSize(130,120), wxRAISED_BORDER | wxTAB_TRAVERSAL );
221 test->SetBackgroundColour( wxT("WHEAT") );
222 test->SetCursor( wxCursor( wxCURSOR_PENCIL ) );
223 test2 = new wxButton( test, -1, "Hallo", wxPoint(10,10) );
224 test2->SetCursor( wxCursor( wxCURSOR_NO_ENTRY ) );
225
226 #endif
227
228 SetBackgroundColour( wxT("BLUE") );
229
230 SetCursor( wxCursor( wxCURSOR_IBEAM ) );
231 }
232
233 MyCanvas::~MyCanvas()
234 {
235 }
236
237 void MyCanvas::OnMouseDown( wxMouseEvent &event )
238 {
239 if (event.LeftDown())
240 {
241 wxPoint pt( event.GetPosition() );
242 int x,y;
243 CalcUnscrolledPosition( pt.x, pt.y, &x, &y );
244 wxLogMessage( wxT("Mouse down event at: %d %d, scrolled: %d %d"), pt.x, pt.y, x, y );
245
246 if ( !event.LeftIsDown() )
247 wxLogMessage( wxT("Error: LeftIsDown() should be TRUE if for LeftDown()") );
248 }
249 }
250
251 void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) )
252 {
253 wxPaintDC dc( this );
254 PrepareDC( dc );
255
256 dc.DrawText( "Press mouse button to test calculations!", 160, 50 );
257
258 dc.DrawText( "Some text", 140, 140 );
259
260 dc.DrawRectangle( 100, 160, 200, 200 );
261 }
262
263 void MyCanvas::OnQueryPosition( wxCommandEvent &WXUNUSED(event) )
264 {
265 wxPoint pt( m_button->GetPosition() );
266 wxLogMessage( wxT("Position of \"Query position\" is %d %d"), pt.x, pt.y );
267 pt = ClientToScreen( pt );
268 wxLogMessage( wxT("Position of \"Query position\" on screen is %d %d"), pt.x, pt.y );
269 }
270
271 void MyCanvas::OnAddButton( wxCommandEvent &WXUNUSED(event) )
272 {
273 wxLogMessage( wxT("Inserting button at position 10,70...") );
274 wxButton *button = new wxButton( this, ID_NEWBUTTON, "new button", wxPoint(10,70), wxSize(80,25) );
275 wxPoint pt( button->GetPosition() );
276 wxLogMessage( wxT("-> Position after inserting %d %d"), pt.x, pt.y );
277 }
278
279 void MyCanvas::OnDeleteButton( wxCommandEvent &event )
280 {
281 wxLogMessage( wxT("Deleting button inserted with \"Add button\"...") );
282 wxWindow *win = FindWindow( ID_NEWBUTTON );
283 if (win)
284 win->Destroy();
285 else
286 wxLogMessage( wxT("-> No window with id = ID_NEWBUTTON found.") );
287 }
288
289 void MyCanvas::OnMoveButton( wxCommandEvent &event )
290 {
291 wxLogMessage( wxT("Moving button 10 pixels downward..") );
292 wxWindow *win = FindWindow( event.GetId() );
293 wxPoint pt( win->GetPosition() );
294 wxLogMessage( wxT("-> Position before move is %d %d"), pt.x, pt.y );
295 win->Move( -1, pt.y + 10 );
296 pt = win->GetPosition();
297 wxLogMessage( wxT("-> Position after move is %d %d"), pt.x, pt.y );
298 }
299
300 void MyCanvas::OnScrollWin( wxCommandEvent &WXUNUSED(event) )
301 {
302 wxLogMessage( wxT("Scrolling 2 units up.\nThe white square and the controls should move equally!") );
303 int x,y;
304 GetViewStart( &x, &y );
305 Scroll( -1, y+2 );
306 }
307
308 // MyFrame
309
310 const int ID_QUIT = 108;
311 const int ID_ABOUT = 109;
312 const int ID_DELETE_ALL = 110;
313 const int ID_INSERT_NEW = 111;
314
315 IMPLEMENT_DYNAMIC_CLASS( MyFrame, wxFrame )
316
317 BEGIN_EVENT_TABLE(MyFrame,wxFrame)
318 EVT_MENU (ID_DELETE_ALL, MyFrame::OnDeleteAll)
319 EVT_MENU (ID_INSERT_NEW, MyFrame::OnInsertNew)
320 EVT_MENU (ID_ABOUT, MyFrame::OnAbout)
321 EVT_MENU (ID_QUIT, MyFrame::OnQuit)
322 END_EVENT_TABLE()
323
324 MyFrame::MyFrame()
325 : wxFrame( (wxFrame *)NULL, -1, "wxScrolledWindow sample",
326 wxPoint(20,20), wxSize(470,500) )
327 {
328 wxMenu *file_menu = new wxMenu();
329 file_menu->Append( ID_DELETE_ALL, "Delete all");
330 file_menu->Append( ID_INSERT_NEW, "Insert new");
331 file_menu->Append( ID_ABOUT, "&About..");
332 file_menu->Append( ID_QUIT, "E&xit\tAlt-X");
333
334 wxMenuBar *menu_bar = new wxMenuBar();
335 menu_bar->Append(file_menu, "&File");
336
337 SetMenuBar( menu_bar );
338
339 CreateStatusBar(2);
340 int widths[] = { -1, 100 };
341 SetStatusWidths( 2, widths );
342
343 m_canvas = new MyCanvas( this, -1, wxPoint(0,0), wxSize(100,100) );
344 m_canvas->SetScrollbars( 10, 10, 50, 100 );
345
346 wxBoxSizer *topsizer = new wxBoxSizer( wxVERTICAL );
347
348 topsizer->Add( m_canvas, 1, wxEXPAND );
349
350 wxSizer *sizerBtm = new wxBoxSizer(wxHORIZONTAL);
351 sizerBtm->Add( new MyScrolledWindowDumb(this), 1, wxEXPAND );
352 sizerBtm->Add( new MyScrolledWindowSmart(this), 1, wxEXPAND );
353 topsizer->Add( sizerBtm, 1, wxEXPAND );
354
355 SetAutoLayout( TRUE );
356 SetSizer( topsizer );
357 }
358
359 void MyFrame::OnDeleteAll( wxCommandEvent &WXUNUSED(event) )
360 {
361 m_canvas->DestroyChildren();
362 }
363
364 void MyFrame::OnInsertNew( wxCommandEvent &WXUNUSED(event) )
365 {
366 (void)new wxButton( m_canvas, -1, "Hello", wxPoint(100,100) );
367 }
368
369 void MyFrame::OnQuit( wxCommandEvent &WXUNUSED(event) )
370 {
371 Close( TRUE );
372 }
373
374 void MyFrame::OnAbout( wxCommandEvent &WXUNUSED(event) )
375 {
376 (void)wxMessageBox( "wxScroll demo\n"
377 "Robert Roebling (c) 1998",
378 "About wxScroll Demo", wxICON_INFORMATION | wxOK );
379 }
380
381 //-----------------------------------------------------------------------------
382 // MyApp
383 //-----------------------------------------------------------------------------
384
385 bool MyApp::OnInit()
386 {
387 wxFrame *frame = new MyFrame();
388 frame->Show( TRUE );
389
390 return TRUE;
391 }
392
393 // ----------------------------------------------------------------------------
394 // MyScrolledWindowXXX
395 // ----------------------------------------------------------------------------
396
397 void MyScrolledWindowBase::InitScrollbars()
398 {
399 wxClientDC dc(this);
400 dc.GetTextExtent(_T("Line 17"), NULL, &m_hLine);
401
402 // no horz scrolling
403 SetScrollbars(0, m_hLine, 0, m_nLines + 1, 0, 0, TRUE /* no refresh */);
404 }
405
406 void MyScrolledWindowDumb::OnDraw(wxDC& dc)
407 {
408 // this is useful to see which lines are redrawn
409 static size_t s_redrawCount = 0;
410 dc.SetTextForeground(s_redrawCount++ % 2 ? *wxRED : *wxBLUE);
411
412 wxCoord y = 0;
413 for ( size_t line = 0; line < m_nLines; line++ )
414 {
415 wxCoord yPhys;
416 CalcScrolledPosition(0, y, NULL, &yPhys);
417
418 dc.DrawText(wxString::Format(_T("Line %u (logical %d, physical %d)"),
419 line, y, yPhys), 0, y);
420 y += m_hLine;
421 }
422 }
423
424 void MyScrolledWindowSmart::OnDraw(wxDC& dc)
425 {
426 // this is useful to see which lines are redrawn
427 static size_t s_redrawCount = 0;
428 dc.SetTextForeground(s_redrawCount++ % 2 ? *wxRED : *wxBLUE);
429
430 // update region is always in device coords, translate to logical ones
431 wxRect rectUpdate = GetUpdateRegion().GetBox();
432 CalcUnscrolledPosition(rectUpdate.x, rectUpdate.y,
433 &rectUpdate.x, &rectUpdate.y);
434
435 size_t lineFrom = rectUpdate.y / m_hLine,
436 lineTo = rectUpdate.GetBottom() / m_hLine;
437
438 if ( lineTo > m_nLines - 1)
439 lineTo = m_nLines - 1;
440
441 wxCoord y = lineFrom*m_hLine;
442 for ( size_t line = lineFrom; line <= lineTo; line++ )
443 {
444 wxCoord yPhys;
445 CalcScrolledPosition(0, y, NULL, &yPhys);
446
447 dc.DrawText(wxString::Format(_T("Line %u (logical %d, physical %d)"),
448 line, y, yPhys), 0, y);
449 y += m_hLine;
450 }
451 }