7e12d1bf7f
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@6550 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
374 lines
10 KiB
C++
374 lines
10 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: caret.cpp
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// Purpose: wxCaret sample
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// Author: Robert Roebling
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// Modified by:
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// Created: 04/01/98
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// RCS-ID: $Id$
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// Copyright: (c) wxWindows team
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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// For compilers that support precompilation, includes "wx/wx.h".
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#include <wx/wxprec.h>
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#ifdef __BORLANDC__
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#pragma hdrstop
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#endif
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// for all others, include the necessary headers (this file is usually all you
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// need because it includes almost all <standard< wxWindows headers
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#ifndef WX_PRECOMP
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#include <wx/wx.h>
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#include <wx/log.h>
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#endif
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#include "wx/caret.h"
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// ----------------------------------------------------------------------------
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// ressources
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// ----------------------------------------------------------------------------
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// the application icon
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#if defined(__WXGTK__) || defined(__WXMOTIF__)
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#include "mondrian.xpm"
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#endif
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// ----------------------------------------------------------------------------
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// private classes
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// ----------------------------------------------------------------------------
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// Define a new application type, each program should derive a class from wxApp
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class MyApp : public wxApp
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{
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public:
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// override base class virtuals
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// ----------------------------
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// this one is called on application startup and is a good place for the app
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// initialization (doing it here and not in the ctor allows to have an error
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// return: if OnInit() returns false, the application terminates)
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virtual bool OnInit();
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};
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// Define a new frame type: this is going to be our main frame
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class MyFrame : public wxFrame
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{
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public:
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// ctor(s)
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MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size);
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// event handlers (these functions should _not_ be virtual)
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void OnQuit(wxCommandEvent& event);
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void OnAbout(wxCommandEvent& event);
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private:
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// any class wishing to process wxWindows events must use this macro
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DECLARE_EVENT_TABLE()
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};
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// MyCanvas is a canvas on which you can type
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class MyCanvas: public wxScrolledWindow
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{
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public:
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MyCanvas() { }
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MyCanvas( wxWindow *parent );
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~MyCanvas();
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wxChar& CharAt(int x, int y) { return *(m_text + x + m_xChars * y); }
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// caret movement
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void Home() { m_xCaret = 0; }
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void End() { m_xCaret = m_xChars - 1; }
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void FirstLine() { m_yCaret = 0; }
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void LastLine() { m_yCaret = m_yChars - 1; }
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void PrevChar() { if ( !m_xCaret-- ) { End(); PrevLine(); } }
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void NextChar() { if ( ++m_xCaret == m_xChars ) { Home(); NextLine(); } }
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void PrevLine() { if ( !m_yCaret-- ) LastLine(); }
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void NextLine() { if ( ++m_yCaret == m_yChars ) FirstLine(); }
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// event handlers
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void OnPaint( wxPaintEvent &event );
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void OnSize( wxSizeEvent &event );
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void OnChar( wxKeyEvent &event );
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private:
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wxFont m_font;
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// the margin around the text (looks nicer)
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int m_xMargin, m_yMargin;
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// size (in pixels) of one character
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long m_widthChar, m_heightChar;
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// position (in text coords) of the caret
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int m_xCaret, m_yCaret;
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// the size (in text coords) of the window
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int m_xChars, m_yChars;
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// the text
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wxChar *m_text;
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DECLARE_DYNAMIC_CLASS(MyCanvas)
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DECLARE_EVENT_TABLE()
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};
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// ----------------------------------------------------------------------------
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// constants
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// ----------------------------------------------------------------------------
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// IDs for the controls and the menu commands
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enum
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{
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// menu items
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Caret_Quit = 1,
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Caret_About,
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Caret_Test1,
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Caret_Test2,
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// controls start here (the numbers are, of course, arbitrary)
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Caret_Text = 1000
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};
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// ----------------------------------------------------------------------------
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// event tables and other macros for wxWindows
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// ----------------------------------------------------------------------------
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// the event tables connect the wxWindows events with the functions (event
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// handlers) which process them. It can be also done at run-time, but for the
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// simple menu events like this the static method is much simpler.
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BEGIN_EVENT_TABLE(MyFrame, wxFrame)
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EVT_MENU(Caret_Quit, MyFrame::OnQuit)
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EVT_MENU(Caret_About, MyFrame::OnAbout)
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END_EVENT_TABLE()
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// Create a new application object: this macro will allow wxWindows to create
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// the application object during program execution (it's better than using a
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// static object for many reasons) and also declares the accessor function
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// wxGetApp() which will return the reference of the right type (i.e. MyApp and
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// not wxApp)
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IMPLEMENT_APP(MyApp)
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// ============================================================================
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// implementation
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// ============================================================================
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// ----------------------------------------------------------------------------
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// the application class
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// ----------------------------------------------------------------------------
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// `Main program' equivalent: the program execution "starts" here
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bool MyApp::OnInit()
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{
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// Create the main application window
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MyFrame *frame = new MyFrame("Caret wxWindows sample",
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wxPoint(50, 50), wxSize(450, 340));
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// Show it and tell the application that it's our main window
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// @@@ what does it do exactly, in fact? is it necessary here?
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frame->Show(TRUE);
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SetTopWindow(frame);
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// success: wxApp::OnRun() will be called which will enter the main message
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// loop and the application will run. If we returned FALSE here, the
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// application would exit immediately.
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return TRUE;
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}
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// ----------------------------------------------------------------------------
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// main frame
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// ----------------------------------------------------------------------------
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// frame constructor
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MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
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: wxFrame((wxFrame *)NULL, -1, title, pos, size)
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{
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// set the frame icon
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SetIcon(wxICON(mondrian));
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// create a menu bar
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wxMenu *menuFile = new wxMenu;
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menuFile->Append(Caret_About, "&About...\tCtrl-A", "Show about dialog");
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menuFile->AppendSeparator();
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menuFile->Append(Caret_Quit, "E&xit\tAlt-X", "Quit this program");
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// now append the freshly created menu to the menu bar...
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wxMenuBar *menuBar = new wxMenuBar;
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menuBar->Append(menuFile, "&File");
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// ... and attach this menu bar to the frame
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SetMenuBar(menuBar);
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(void) new MyCanvas( this );
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// create a status bar just for fun (by default with 1 pane only)
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CreateStatusBar(2);
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SetStatusText("Welcome to wxWindows!");
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}
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// event handlers
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void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
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{
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// TRUE is to force the frame to close
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Close(TRUE);
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}
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void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
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{
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wxMessageBox(_T("This is the about dialog of caret sample."), "About Caret", wxOK | wxICON_INFORMATION, this);
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}
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// ----------------------------------------------------------------------------
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// MyCanvas
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// ----------------------------------------------------------------------------
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IMPLEMENT_DYNAMIC_CLASS(MyCanvas, wxScrolledWindow)
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BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow)
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EVT_PAINT(MyCanvas::OnPaint)
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EVT_SIZE(MyCanvas::OnSize)
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EVT_CHAR(MyCanvas::OnChar)
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END_EVENT_TABLE()
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MyCanvas::MyCanvas( wxWindow *parent )
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: wxScrolledWindow( parent, -1,
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wxDefaultPosition, wxDefaultSize,
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wxSUNKEN_BORDER )
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{
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m_text = (wxChar *)NULL;
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SetBackgroundColour(* wxWHITE);
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m_font = *wxNORMAL_FONT;
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wxClientDC dc(this);
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dc.SetFont( m_font );
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m_heightChar = dc.GetCharHeight();
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m_widthChar = dc.GetCharWidth();
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wxCaret *caret = new wxCaret(this, m_widthChar, m_heightChar);
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SetCaret(caret);
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m_xCaret = m_yCaret =
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m_xChars = m_yChars = 0;
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m_xMargin = m_yMargin = 5;
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caret->Move(m_xMargin, m_yMargin);
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caret->Show();
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}
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MyCanvas::~MyCanvas()
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{
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free(m_text);
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}
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void MyCanvas::OnSize( wxSizeEvent &event )
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{
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m_xChars = (event.GetSize().x - 2*m_xMargin) / m_widthChar;
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m_yChars = (event.GetSize().y - 2*m_yMargin) / m_heightChar;
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if ( !m_xChars )
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m_xChars = 1;
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if ( !m_yChars )
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m_yChars = 1;
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free(m_text);
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m_text = (wxChar *)calloc(m_xChars * m_yChars, sizeof(wxChar));
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wxFrame *frame = wxDynamicCast(GetParent(), wxFrame);
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if ( frame && frame->GetStatusBar() )
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{
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wxString msg;
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msg.Printf(_T("Panel size is (%d, %d)"), m_xChars, m_yChars);
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frame->SetStatusText(msg, 1);
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}
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event.Skip();
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}
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void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) )
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{
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wxPaintDC dc( this );
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PrepareDC( dc );
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dc.SetFont( m_font );
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for ( int y = 0; y < m_yChars; y++ )
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{
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wxString line;
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for ( int x = 0; x < m_xChars; x++ )
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{
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wxChar ch = CharAt(x, y);
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if ( !ch )
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ch = _T(' ');
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line += ch;
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}
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dc.DrawText( line, m_xMargin, m_yMargin + y * m_heightChar );
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}
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}
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void MyCanvas::OnChar( wxKeyEvent &event )
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{
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switch ( event.KeyCode() )
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{
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case WXK_LEFT:
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PrevChar();
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break;
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case WXK_RIGHT:
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NextChar();
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break;
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case WXK_UP:
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PrevLine();
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break;
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case WXK_DOWN:
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NextLine();
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break;
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case WXK_HOME:
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Home();
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break;
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case WXK_END:
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End();
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break;
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case WXK_RETURN:
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Home();
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NextLine();
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break;
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default:
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if ( !event.AltDown() && wxIsprint(event.KeyCode()) )
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{
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CharAt(m_xCaret, m_yCaret) = (wxChar)event.KeyCode();
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NextChar();
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}
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else
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{
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event.Skip();
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// don't refresh
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return;
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}
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}
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wxLogStatus(_T("Caret is at (%d, %d)"), m_xCaret, m_yCaret);
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GetCaret()->Move(m_xMargin + m_xCaret * m_widthChar,
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m_yMargin + m_yCaret * m_heightChar);
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Refresh();
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}
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