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git.saurik.com Git - wxWidgets.git/blob - samples/caret/caret.cpp
1 /////////////////////////////////////////////////////////////////////////////
3 // Purpose: wxCaret sample
4 // Author: Robert Roebling
7 // Copyright: (c) wxWindows team
8 // Licence: wxWindows licence
9 /////////////////////////////////////////////////////////////////////////////
11 // For compilers that support precompilation, includes "wx/wx.h".
12 #include "wx/wxprec.h"
18 // for all others, include the necessary headers (this file is usually all you
19 // need because it includes almost all <standard< wxWidgets headers
26 #include "wx/numdlg.h"
28 // ----------------------------------------------------------------------------
30 // ----------------------------------------------------------------------------
32 // the application icon
33 #ifndef wxHAS_IMAGES_IN_RESOURCES
34 #include "../sample.xpm"
37 // ----------------------------------------------------------------------------
39 // ----------------------------------------------------------------------------
41 // Define a new application type, each program should derive a class from wxApp
42 class MyApp
: public wxApp
45 // override base class virtuals
46 // ----------------------------
48 // this one is called on application startup and is a good place for the app
49 // initialization (doing it here and not in the ctor allows to have an error
50 // return: if OnInit() returns false, the application terminates)
51 virtual bool OnInit();
54 // MyCanvas is a canvas on which you can type
55 class MyCanvas
: public wxScrolledWindow
59 MyCanvas( wxWindow
*parent
);
62 wxChar
& CharAt(int x
, int y
) { return *(m_text
+ x
+ m_xChars
* y
); }
65 void SetFontSize(int fontSize
);
67 void MoveCaret(int x
, int y
);
70 void Home() { m_xCaret
= 0; }
71 void End() { m_xCaret
= m_xChars
- 1; }
72 void FirstLine() { m_yCaret
= 0; }
73 void LastLine() { m_yCaret
= m_yChars
- 1; }
74 void PrevChar() { if ( !m_xCaret
-- ) { End(); PrevLine(); } }
75 void NextChar() { if ( ++m_xCaret
== m_xChars
) { Home(); NextLine(); } }
76 void PrevLine() { if ( !m_yCaret
-- ) LastLine(); }
77 void NextLine() { if ( ++m_yCaret
== m_yChars
) FirstLine(); }
80 void OnPaint( wxPaintEvent
&event
);
81 void OnSize( wxSizeEvent
&event
);
82 void OnChar( wxKeyEvent
&event
);
85 // move the caret to m_xCaret, m_yCaret
88 // update the geometry
93 // the margin around the text (looks nicer)
94 int m_xMargin
, m_yMargin
;
96 // size (in pixels) of one character
97 long m_widthChar
, m_heightChar
;
99 // position (in text coords) of the caret
100 int m_xCaret
, m_yCaret
;
102 // the size (in text coords) of the window
103 int m_xChars
, m_yChars
;
108 DECLARE_DYNAMIC_CLASS(MyCanvas
)
109 DECLARE_EVENT_TABLE()
113 // Define a new frame type: this is going to be our main frame
114 class MyFrame
: public wxFrame
118 MyFrame(const wxString
& title
, const wxPoint
& pos
, const wxSize
& size
);
120 // event handlers (these functions should _not_ be virtual)
121 void OnQuit(wxCommandEvent
& event
);
122 void OnAbout(wxCommandEvent
& event
);
123 void OnSetBlinkTime(wxCommandEvent
& event
);
124 void OnSetFontSize(wxCommandEvent
& event
);
125 void OnCaretMove(wxCommandEvent
& event
);
130 // any class wishing to process wxWidgets events must use this macro
131 DECLARE_EVENT_TABLE()
134 // ----------------------------------------------------------------------------
136 // ----------------------------------------------------------------------------
138 // IDs for the controls and the menu commands
148 // controls start here (the numbers are, of course, arbitrary)
152 // ----------------------------------------------------------------------------
153 // event tables and other macros for wxWidgets
154 // ----------------------------------------------------------------------------
156 // the event tables connect the wxWidgets events with the functions (event
157 // handlers) which process them. It can be also done at run-time, but for the
158 // simple menu events like this the static method is much simpler.
159 BEGIN_EVENT_TABLE(MyFrame
, wxFrame
)
160 EVT_MENU(Caret_Quit
, MyFrame::OnQuit
)
161 EVT_MENU(Caret_About
, MyFrame::OnAbout
)
162 EVT_MENU(Caret_SetBlinkTime
, MyFrame::OnSetBlinkTime
)
163 EVT_MENU(Caret_SetFontSize
, MyFrame::OnSetFontSize
)
164 EVT_MENU(Caret_Move
, MyFrame::OnCaretMove
)
167 // Create a new application object: this macro will allow wxWidgets to create
168 // the application object during program execution (it's better than using a
169 // static object for many reasons) and also declares the accessor function
170 // wxGetApp() which will return the reference of the right type (i.e. MyApp and
174 // ============================================================================
176 // ============================================================================
178 // ----------------------------------------------------------------------------
179 // the application class
180 // ----------------------------------------------------------------------------
182 // `Main program' equivalent: the program execution "starts" here
185 if ( !wxApp::OnInit() )
188 // create and show the main application window
189 MyFrame
*frame
= new MyFrame(wxT("Caret wxWidgets sample"),
190 wxPoint(50, 50), wxSize(450, 340));
194 // success: wxApp::OnRun() will be called which will enter the main message
195 // loop and the application will run. If we returned false here, the
196 // application would exit immediately.
200 // ----------------------------------------------------------------------------
202 // ----------------------------------------------------------------------------
205 MyFrame::MyFrame(const wxString
& title
, const wxPoint
& pos
, const wxSize
& size
)
206 : wxFrame((wxFrame
*)NULL
, wxID_ANY
, title
, pos
, size
)
208 // set the frame icon
209 SetIcon(wxICON(sample
));
212 wxMenu
*menuFile
= new wxMenu
;
214 menuFile
->Append(Caret_SetBlinkTime
, wxT("&Blink time...\tCtrl-B"));
215 menuFile
->Append(Caret_SetFontSize
, wxT("&Font size...\tCtrl-S"));
216 menuFile
->Append(Caret_Move
, wxT("&Move caret\tCtrl-C"));
217 menuFile
->AppendSeparator();
218 menuFile
->Append(Caret_About
, wxT("&About\tCtrl-A"), wxT("Show about dialog"));
219 menuFile
->AppendSeparator();
220 menuFile
->Append(Caret_Quit
, wxT("E&xit\tAlt-X"), wxT("Quit this program"));
222 // now append the freshly created menu to the menu bar...
223 wxMenuBar
*menuBar
= new wxMenuBar
;
224 menuBar
->Append(menuFile
, wxT("&File"));
226 // ... and attach this menu bar to the frame
229 m_canvas
= new MyCanvas(this);
232 // create a status bar just for fun (by default with 1 pane only)
234 SetStatusText(wxT("Welcome to wxWidgets!"));
235 #endif // wxUSE_STATUSBAR
241 void MyFrame::OnQuit(wxCommandEvent
& WXUNUSED(event
))
243 // true is to force the frame to close
247 void MyFrame::OnAbout(wxCommandEvent
& WXUNUSED(event
))
249 wxMessageBox(wxT("The caret wxWidgets sample.\n(c) 1999 Vadim Zeitlin"),
250 wxT("About Caret"), wxOK
| wxICON_INFORMATION
, this);
253 void MyFrame::OnCaretMove(wxCommandEvent
& WXUNUSED(event
))
255 m_canvas
->MoveCaret(10, 10);
258 void MyFrame::OnSetBlinkTime(wxCommandEvent
& WXUNUSED(event
))
260 long blinkTime
= wxGetNumberFromUser
262 wxT("The caret blink time is the time between two blinks"),
263 wxT("Time in milliseconds:"),
264 wxT("wxCaret sample"),
265 wxCaret::GetBlinkTime(), 0, 10000,
268 if ( blinkTime
!= -1 )
270 wxCaret::SetBlinkTime((int)blinkTime
);
271 m_canvas
->CreateCaret();
272 wxLogStatus(this, wxT("Blink time set to %ld milliseconds."), blinkTime
);
276 void MyFrame::OnSetFontSize(wxCommandEvent
& WXUNUSED(event
))
278 long fontSize
= wxGetNumberFromUser
280 wxT("The font size also determines the caret size so\nthis demonstrates resizing the caret."),
281 wxT("Font size (in points):"),
282 wxT("wxCaret sample"),
287 if ( fontSize
!= -1 )
289 m_canvas
->SetFontSize((int)fontSize
);
293 // ----------------------------------------------------------------------------
295 // ----------------------------------------------------------------------------
297 IMPLEMENT_DYNAMIC_CLASS(MyCanvas
, wxScrolledWindow
)
299 BEGIN_EVENT_TABLE(MyCanvas
, wxScrolledWindow
)
300 EVT_PAINT(MyCanvas::OnPaint
)
301 EVT_SIZE(MyCanvas::OnSize
)
302 EVT_CHAR(MyCanvas::OnChar
)
305 MyCanvas::MyCanvas( wxWindow
*parent
)
306 : wxScrolledWindow( parent
, wxID_ANY
,
307 wxDefaultPosition
, wxDefaultSize
,
310 m_text
= (wxChar
*)NULL
;
312 SetBackgroundColour(*wxWHITE
);
316 m_xCaret
= m_yCaret
=
317 m_xChars
= m_yChars
= 0;
319 m_xMargin
= m_yMargin
= 5;
324 MyCanvas::~MyCanvas()
329 void MyCanvas::CreateCaret()
331 wxCaret
*caret
= new wxCaret(this, m_widthChar
, m_heightChar
);
334 caret
->Move(m_xMargin
, m_yMargin
);
338 void MyCanvas::SetFontSize(int fontSize
)
340 m_font
= wxFont(fontSize
, wxFONTFAMILY_TELETYPE
,
341 wxFONTSTYLE_NORMAL
, wxFONTWEIGHT_NORMAL
);
345 m_heightChar
= dc
.GetCharHeight();
346 m_widthChar
= dc
.GetCharWidth();
348 wxCaret
*caret
= GetCaret();
351 caret
->SetSize(m_widthChar
, m_heightChar
);
357 void MyCanvas::MoveCaret(int x
, int y
)
365 void MyCanvas::DoMoveCaret()
367 wxLogStatus(wxT("Caret is at (%d, %d)"), m_xCaret
, m_yCaret
);
369 GetCaret()->Move(m_xMargin
+ m_xCaret
* m_widthChar
,
370 m_yMargin
+ m_yCaret
* m_heightChar
);
373 void MyCanvas::OnSize(wxSizeEvent
& event
)
380 void MyCanvas::ChangeSize()
382 wxSize size
= GetClientSize();
383 m_xChars
= (size
.x
- 2*m_xMargin
) / m_widthChar
;
384 m_yChars
= (size
.y
- 2*m_yMargin
) / m_heightChar
;
391 m_text
= (wxChar
*)calloc(m_xChars
* m_yChars
, sizeof(wxChar
));
394 wxFrame
*frame
= wxDynamicCast(GetParent(), wxFrame
);
396 if ( frame
&& frame
->GetStatusBar() )
399 msg
.Printf(wxT("Panel size is (%d, %d)"), m_xChars
, m_yChars
);
400 frame
->SetStatusText(msg
, 1);
402 #endif // wxUSE_STATUSBAR
405 // NB: this method is horrible inefficient especially because the caret
406 // needs to be redrawn often and in this case we only have to redraw
407 // the caret location and not the entire window - in a real program we
408 // would use GetUpdateRegion() and iterate over rectangles it contains
409 void MyCanvas::OnPaint( wxPaintEvent
&WXUNUSED(event
) )
411 wxCaretSuspend
cs(this);
412 wxPaintDC
dc( this );
416 dc
.SetFont( m_font
);
418 for ( int y
= 0; y
< m_yChars
; y
++ )
422 for ( int x
= 0; x
< m_xChars
; x
++ )
424 wxChar ch
= CharAt(x
, y
);
428 dc
.DrawText(ch
, m_xMargin
+ x
* m_widthChar
,
429 m_yMargin
+ y
* m_heightChar
);
436 dc
.DrawText( line
, m_xMargin
, m_yMargin
+ y
* m_heightChar
);
441 void MyCanvas::OnChar( wxKeyEvent
&event
)
443 switch ( event
.GetKeyCode() )
475 if ( !event
.AltDown() && wxIsprint(event
.GetKeyCode()) )
477 wxChar ch
= (wxChar
)event
.GetKeyCode();
478 CharAt(m_xCaret
, m_yCaret
) = ch
;
480 wxCaretSuspend
cs(this);
483 dc
.SetBackgroundMode(wxSOLID
); // overwrite old value
484 dc
.DrawText(ch
, m_xMargin
+ m_xCaret
* m_widthChar
,
485 m_yMargin
+ m_yCaret
* m_heightChar
);