keyboarddialog.cpp

roadnav 内含一个基于wxWindows库的车载导航系统。编译后

/*
 *  Roadnav
 *  KeyboardDialog.cpp
 *
 *  Copyright (c) 2004 - 2006 Richard L. Lynch <[e-mail]>
 *
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of version 2 of the GNU General Public License
 *  as published by the Free Software Foundation.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

//////////////////////////////////////////////////////////////////////////////
/// \file
///
/// Contains a dialog containing an onscreen keyboard, allowing text to be
/// entered into a wxTextCtrl without using a physical keyboard.
///
//////////////////////////////////////////////////////////////////////////////

#ifdef HAVE_CONFIG_H
#  include <config.h>
#endif

#include <wx/wx.h>

#include "KeyboardDialog.h"

//////////////////////////////////////////////////////////////////////////////
///
/// \brief KeyboardDialog event table
///
//////////////////////////////////////////////////////////////////////////////
BEGIN_EVENT_TABLE(KeyboardDialog, wxDialog)
	EVT_BUTTON(wxID_OK, KeyboardDialog::OnOk)
	EVT_CUSTOM_RANGE(wxEVT_COMMAND_BUTTON_CLICKED, 0, 255, KeyboardDialog::OnKBButtonPress)
END_EVENT_TABLE()

//////////////////////////////////////////////////////////////////////////////
///
/// \brief KeyboardDialog constructor
///
/// Creates the various controls in the dialog box
///
//////////////////////////////////////////////////////////////////////////////
KeyboardDialog::KeyboardDialog(wxWindow *parent, wxString strTitle, wxTextCtrl * pctlText)
             : wxDialog(parent, -1, strTitle, wxDefaultPosition, wxSize(630, 450))
{
	int iLine;

	int iWidth;
	int iHeight;
	
	GetSize(&iWidth, &iHeight);
	
	int iKeyboardX = 10;
	int iKeyboardY = 90;
	int iKeyWidth = 50;

	// Actual vertical size of the button control
#ifdef __DARWIN__
	int iKeyHeight = 22;
#else
	int iKeyHeight = 50;
#endif

	// Vertical spacing for button controls
	int iKeyVerticalSpacing = 50;
	
	char * pszLines[] = {"1234567890\b",     "QWERTYUIOP",         "ASDFGHJKL\r",       "ZXCVBNM,.", NULL};
	int iLineOffset[] = {0,                iKeyWidth / 3,        iKeyWidth * 2 / 3, iKeyWidth, 0};

	m_fntThis = *wxNORMAL_FONT;
	m_fntThis.SetPointSize(18);
	SetFont(m_fntThis);

	m_pctlText = pctlText;

	m_pctlThisText = new wxTextCtrl(this, -1, m_pctlText->GetValue(), wxPoint(10, 10), wxSize(iWidth - 20, iKeyVerticalSpacing));
	
	for (iLine = 0; pszLines[iLine]; iLine++)
	{
		int iChar;
		
		for (iChar = 0; pszLines[iLine][iChar]; iChar++)
		{
			wxString strLabel;
			int iThisKeyWidth;
			
			if (pszLines[iLine][iChar] == '\b')
			{
				strLabel = wxT("<-");
				iThisKeyWidth = iKeyWidth * 2;
			}
			else if (pszLines[iLine][iChar] == '\r')
			{
				strLabel = wxT("Enter");
				iThisKeyWidth = iKeyWidth * 2;
			}
			else
			{
				strLabel = wxString::Format(wxT("%c"), pszLines[iLine][iChar]);
				iThisKeyWidth = iKeyWidth;
			}
			
			new wxButton(this, pszLines[iLine][iChar], strLabel, wxPoint(iKeyboardX + iKeyWidth * iChar + iLineOffset[iLine], iKeyboardY + iKeyVerticalSpacing * iLine), wxSize(iThisKeyWidth, iKeyHeight));
		}
	}
	new wxButton(this, ' ', wxT("Spacebar"), wxPoint(iKeyboardX + iKeyWidth * 2, iKeyboardY + iKeyVerticalSpacing * iLine), wxSize(iKeyWidth * 8, iKeyHeight));
	
	new wxButton(this, wxID_OK, wxT("&OK"), wxPoint(iWidth / 2 - 150 - 25, iHeight - 100), wxSize(150, 50));
	new wxButton(this, wxID_CANCEL, wxT("&Cancel"), wxPoint(iWidth / 2 + 25, iHeight - 100), wxSize(150, 50));
	
	Center();
}

//////////////////////////////////////////////////////////////////////////////
///
/// \brief A key on the keyboard was pressed. Take the appropriate action.
///
//////////////////////////////////////////////////////////////////////////////
void KeyboardDialog::OnKBButtonPress(wxEvent & event)
{
	wxString strText;
	long lStart, lEnd;
	
	if (event.GetId() == '\r')
	{
		wxCommandEvent evOk(wxEVT_COMMAND_BUTTON_CLICKED, wxID_OK);
		OnOk(evOk);
		return;
	}

	m_pctlThisText->GetSelection(&lStart, &lEnd);
	m_pctlThisText->Remove(lStart, lEnd);
	
	strText = m_pctlThisText->GetValue();
	
	if (event.GetId() != '\b')
	{
		strText = strText.Left(lStart) + wxString::Format(wxT("%c"), event.GetId()) + strText.Mid(lStart);
	}
	else
	{
		if (lStart == lEnd)
			if (lStart > 0)
			{
				strText = strText.Left(lStart - 1) + strText.Mid(lStart);
				lStart -= 2;
			}
	}

	m_pctlThisText->SetValue(strText);
	
	m_pctlThisText->SetFocus();

	m_pctlThisText->SetSelection(lStart + 1, lStart + 1);
}

//////////////////////////////////////////////////////////////////////////////
///
/// \brief Ok button was pressed. Copy the contents of the keyboard back
/// to the original wxTextCtrl.
///
//////////////////////////////////////////////////////////////////////////////
void KeyboardDialog::OnOk(wxCommandEvent & event)
{
	m_pctlText->SetValue(m_pctlThisText->GetValue());
	wxDialog::OnOK(event);
}