barwidget.cpp

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/***************************************************************************
    Copyright 2014 Andreas Xavier
    Copyright 2014 Inge Wallin
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 ***************************************************************************/


// Own
#include "barwidget.h"

// Qt
#include <QDebug>
#include <QWidget>
#include <QPainter>
#include <QPen>

// KDE
#include <KDebug>
#include <klocalizedstring.h>

// Parley
#include "collectionwidget.h"  // for COLLWIDTH, etc


// FIXME: Find a better home for this variable.
ConfidenceColors globalColors = ConfidenceColors();


BarWidget::BarWidget(QWidget *parent)
    : QWidget(parent)
{

}

BarWidget::BarWidget(WordCount *dueWords, QWidget *parent)
    : QWidget(parent)
{
    QPalette palette(BarWidget::palette());
    palette.setColor(backgroundRole(), Qt::white);
    setPalette(palette);

    for (int i = 0; i <= KV_MAX_GRADE; i++) {
        m_dueWords[i] = dueWords->grades[i];
    }
    m_totalDueWords = dueWords->totalWords;
    m_percentageCompleted = dueWords->percentageCompleted();
}


void BarWidget::setDue(WordCount &wc)
{
    for (int i = 0; i <= KV_MAX_GRADE; ++i) {
        m_dueWords[i] = wc.grades[i];
    }
    m_totalDueWords = wc.totalWords;

    update();
}


void BarWidget::paintEvent(QPaintEvent *)
{
    QPainter painter(this);
    const int legendWidth = COLLWIDTH - 10;
    const int legendHeight = 20;
    const int legendOffsetY = 0;
    const int legendOffsetX = 0;
    //const int alphaValueIncrement = 35;

    int gradeBarWidth[9];
    gradeBarWidth[8] = 0;
    int gradeBarOffset[9];
    gradeBarOffset[8] = 0;

    //kDebug() << "percentage completed: " << m_percentageCompleted;
    //kDebug() << "Total due words: " << m_totalDueWords;

    if (m_percentageCompleted < 100) {
        for(int j = 7; j >= 0; j--) {
            gradeBarWidth[j] = (float)(m_dueWords[j]) / (float)(m_totalDueWords) * legendWidth;
            gradeBarOffset[j] = gradeBarOffset[j+1] + gradeBarWidth[j+1];
        }
    }
    else {
        for(int j = 6; j >= 0; j--) {
            gradeBarWidth[j] = 0;
            gradeBarOffset[j] = legendWidth;
        }
        gradeBarWidth[7] = legendWidth;
        gradeBarOffset[7] = 0;
    }
    if (m_percentageCompleted < 100 && m_totalDueWords == 0) {
        for(int j = 6; j >= 0; j--) {
            gradeBarWidth[j] = 0;
            gradeBarOffset[j] = legendWidth;
        }
        gradeBarWidth[7] = legendWidth;
        gradeBarOffset[7] = 0;
    }

    QPen penBar(QColor(255,255,255));
    painter.setPen(penBar);
    QRect roundedRect(0, 0, legendWidth, legendHeight);
    roundedRect.adjust(1, 1, -1, -1);
    QPainterPath roundedPath;
    roundedPath.addRoundedRect(roundedRect, 8.0, 8.0);

    for (int i = 7; i >= 0; i--) {
        QRectF barElement(0 + legendOffsetX + gradeBarOffset[i], 0 + legendOffsetY, gradeBarWidth[i], legendHeight);
        QPainterPath barElementPath;
        barElementPath.addRect(barElement);
        QPainterPath barElementIntersectedPath = roundedPath.intersected(barElementPath);
        QColor color;
        if (m_totalDueWords == 0 && m_percentageCompleted < 100) {
            color = QColor(0, 0, 0, 128);
        }
        else {
            color = globalColors.longTermColors[i];
        }
        painter.setBrush(QBrush(color));
        painter.drawPath(barElementIntersectedPath);
    }

    QPen pen(QColor(255,255,255));
    //QPen pen(QColor(0, 0, 0));
    painter.setPen(pen);
    if (m_percentageCompleted < 100) {
        painter.drawText(0, 0, legendWidth, 20, Qt::AlignCenter,
             i18np("%1 word due", "%1 words due", m_totalDueWords));
    }
    else {
        painter.drawText(0, 0, legendWidth, 20, Qt::AlignCenter, i18n("Fully learned"));
    }
}