/******************************************************************************\
 * Copyright (c) 2004-2020
 *
 * Author(s):
 *  Volker Fischer
 *
 ******************************************************************************
 *
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation; either version 2 of the License, or (at your option) any later 
 * version.
 *
 * 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 Street, Fifth Floor, Boston, MA  02110-1301, USA
 *
\******************************************************************************/

#include "chatdlg.h"


/* Implementation *************************************************************/
CChatDlg::CChatDlg ( QWidget* parent, Qt::WindowFlags f ) :
    QDialog ( parent, f )
{
    setupUi ( this );


    // Add help text to controls -----------------------------------------------
    // chat window
    txvChatWindow->setWhatsThis ( "<b>" + tr ( "Chat Window" ) + ":</b> " + tr (
        "The chat window shows a history of all chat messages." ) );

    txvChatWindow->setAccessibleName ( tr ( "Chat history" ) );

    // input message text
    edtLocalInputText->setWhatsThis ( "<b>" + tr ( "Input Message Text" ) + ":</b> " + tr (
        "Enter the chat message text in the edit box and press enter to send the "
        "message to the server which distributes the message to all connected "
        "clients. Your message will then show up in the chat window." ) );

    edtLocalInputText->setAccessibleName ( tr ( "New chat text edit box" ) );


    // clear chat window and edit line
    txvChatWindow->clear();
    edtLocalInputText->clear();

    // we do not want to show a cursor in the chat history
    txvChatWindow->setCursorWidth ( 0 );

    // set a placeholder text to make sure where to type the message in (#384)
    edtLocalInputText->setPlaceholderText ( tr ( "Type a message here" ) );


    // Menu  -------------------------------------------------------------------
    QMenuBar* pMenu     = new QMenuBar ( this );
    QMenu*    pEditMenu = new QMenu ( tr ( "&Edit" ), this );

    pEditMenu->addAction ( tr ( "Cl&ear Chat History" ), this,
        SLOT ( OnClearChatHistory() ), QKeySequence ( Qt::CTRL + Qt::Key_E ) );

    pMenu->addMenu ( pEditMenu );

    // Now tell the layout about the menu
    layout()->setMenuBar ( pMenu );


    // Connections -------------------------------------------------------------
    QObject::connect ( edtLocalInputText, &QLineEdit::textChanged,
        this, &CChatDlg::OnLocalInputTextTextChanged );

    QObject::connect ( butSend, &QPushButton::clicked,
        this, &CChatDlg::OnSendText );
}

void CChatDlg::OnLocalInputTextTextChanged ( const QString& strNewText )
{
    // check and correct length
    if ( strNewText.length() > MAX_LEN_CHAT_TEXT )
    {
        // text is too long, update control with shortened text
        edtLocalInputText->setText ( strNewText.left ( MAX_LEN_CHAT_TEXT ) );
    }
}

void CChatDlg::OnSendText()
{
    // send new text and clear line afterwards
    emit NewLocalInputText ( edtLocalInputText->text() );
    edtLocalInputText->clear();
}

void CChatDlg::OnClearChatHistory()
{
    // clear chat window
    txvChatWindow->clear();
}

void CChatDlg::AddChatText ( QString strChatText )
{
    // add new text in chat window
    txvChatWindow->append ( strChatText );

    // notify accessibility plugin that text has changed
    QAccessible::updateAccessibility ( new QAccessibleValueChangeEvent ( txvChatWindow, strChatText ) );
}