WorkflowComments.cpp

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/*  Copyright (C) 2012 Eric Koenigs

    This file is part of Tuchulcha.

    Tuchulcha is free software: you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    Tuchulcha 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 Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public License
    along with Tuchulcha.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "WorkflowComments.h"

#include <QVBoxLayout>
#include <QRegExp>
#include <QTextEdit>
#include <QMutex>

#include "QParameterFile.h"
#include "ParameterFileModel.h"
#include "ObjectInspector.h"

WorkflowComments :: WorkflowComments(QWidget* myParent) :
    QTextEdit(myParent),
    _model(0),
    _textChangeLock(new QMutex())
{
    setAcceptRichText(false);
    connect(this, SIGNAL(textChanged()), SLOT(save()));
    setEnabled(false);
}

WorkflowComments::~WorkflowComments() {
    delete _textChangeLock;
}

void WorkflowComments :: save() {
    // Get the comment from the editor and escape the newlines to HTML
    QString comment = toPlainText();
    comment.replace(QRegExp("\n"), "<br>");

    if (_model && isEnabled() && _textChangeLock->tryLock()) {
        _model -> setValue("editorcomment", comment);
        _textChangeLock->unlock();
    }

}

void WorkflowComments :: load() {
    // Don't do anything if save() caused load() to be called.
    if (_model && _textChangeLock->tryLock()) {
        // Get the current model
        QString comment = _model -> getValue("editorcomment");

        // Replace HTML newlines with escaped newlines
        comment.replace(QRegExp("<br\\s*/?>", Qt::CaseInsensitive), "\n");

        // Update the text field if it has changed
        if ( toPlainText() != comment ) {
            setPlainText( comment );
        }
        _textChangeLock->unlock();
    }
}


void WorkflowComments :: update( ParameterFileModel* model ) {
    if (_model == model) {
        // model didn't change, NOP
        return;
    }
    // if a model exists, disconnect it,
    // and set the new model as the active model
    if (_model) {
        disconnect(_model, 0, this, 0);
    }

    // assign new model
    _model = model;

    // clear old content
    _textChangeLock->lock();
    clear();
    _textChangeLock->unlock();

    // reconnect the load slot to the new model
    if (_model) {
        connect(_model, SIGNAL(modelReset()), SLOT(load()));
        load();
    }
    setEnabled(_model);
}