diagramcontextwidget.cpp

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/*
    Copyright 2006-2019 The QElectroTech Team
    This file is part of QElectroTech.
    
    QElectroTech 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.
    
    QElectroTech 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 QElectroTech.  If not, see <http://www.gnu.org/licenses/>.
*/
#include "diagramcontextwidget.h"
#include "ui_diagramcontextwidget.h"

DiagramContextWidget::DiagramContextWidget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::DiagramContextWidget)
{
    ui->setupUi(this);
    connect(ui->m_table, SIGNAL(itemChanged(QTableWidgetItem *)), this, SLOT(checkTableRows()));
}

DiagramContextWidget::~DiagramContextWidget()
{
    delete ui;
}

DiagramContext DiagramContextWidget::context() const
{
    DiagramContext context;
    
    for (int i = 0 ; i < ui->m_table-> rowCount() ; ++ i)
    {
        QTableWidgetItem *qtwi_name  = ui->m_table-> item(i, 0);
        QTableWidgetItem *qtwi_value = ui->m_table-> item(i, 1);
        if (!qtwi_name || !qtwi_value) {
            continue;
        }
        
        QString key = qtwi_name -> text();
        if (key.isEmpty()) {
            continue;
        }
        
        QString value = qtwi_value -> text();
        context.addValue(key, value);
    }
    
    return(context);
}

void DiagramContextWidget::setContext (const DiagramContext &context)
{
    clear();
    
    int i = 0;
    for (QString key : context.keys(DiagramContext::Alphabetical))
    {
        ui->m_table->setItem(i, 0, new QTableWidgetItem(key));
        ui->m_table->setItem(i, 1, new QTableWidgetItem(context[key].toString()));
        ++ i;
    }
    
    checkTableRows();
}

int DiagramContextWidget::nameLessRowsCount() const
{
    int name_less_rows_count = 0;
    for (int i = 0 ; i < ui->m_table->rowCount() ; ++ i)
    {
        QTableWidgetItem *qtwi_name  = ui->m_table->item(i, 0);
        if (qtwi_name && qtwi_name -> text().isEmpty()) {
            ++ name_less_rows_count;
        }
    }
    
    return(name_less_rows_count);
}

void DiagramContextWidget::clear()
{
    ui->m_table->clearContents();
    for (int i = 1 ; i < ui->m_table->rowCount() ; ++ i) {
        ui->m_table->removeRow(i);
    }
    
    refreshFormatLabel();
}

int DiagramContextWidget::highlightNonAcceptableKeys()
{
    static QRegExp re(DiagramContext::validKeyRegExp());
    
    QBrush fg_brush = ui->m_table->palette().brush(QPalette::WindowText);
    
    int invalid_keys = 0;
    for (int i = 0 ; i < ui->m_table->rowCount() ; ++ i)
    {
        QTableWidgetItem *qtwi_name  = ui->m_table->item(i, 0);
        if (!qtwi_name) {
            continue;
        }
        
        bool highlight = false;
        if (!qtwi_name -> text().isEmpty())
        {
            if (!re.exactMatch(qtwi_name -> text()))
            {
                highlight = true;
                ++ invalid_keys;
            }
        }
        qtwi_name -> setForeground(highlight ? Qt::red : fg_brush);
    }
    
    return(invalid_keys);
}

void DiagramContextWidget::refreshFormatLabel()
{
    QString format_text = tr(
        "Les noms ne peuvent contenir que des lettres minuscules, des "
        "chiffres et des tirets."
    );
    
    if (highlightNonAcceptableKeys()) {
        format_text = QString("<span style=\"color: red;\">%1</span>").arg(format_text);
    }
    ui->m_label->setText(format_text);
}

void DiagramContextWidget::checkTableRows()
{
    refreshFormatLabel();
    if (!nameLessRowsCount())
    {
        int new_idx = ui->m_table->rowCount();
        ui->m_table->setRowCount(new_idx + 1);
        ui->m_table->setItem(new_idx, 0, new QTableWidgetItem(""));
        ui->m_table->setItem(new_idx, 1, new QTableWidgetItem(""));
    }
}