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#include <QtGui>

#include "iconpreviewarea.h"

//! [0]

IconPreviewArea::IconPreviewArea(QWidget *parent)

    : QWidget(parent)

{

    QGridLayout *mainLayout = new QGridLayout;

    setLayout(mainLayout);

    stateLabels[0] = createHeaderLabel(tr("Off"));

    stateLabels[1] = createHeaderLabel(tr("On"));

    Q_ASSERT(NumStates == 2);

    modeLabels[0] = createHeaderLabel(tr("Normal"));

    modeLabels[1] = createHeaderLabel(tr("Active"));

    modeLabels[2] = createHeaderLabel(tr("Disabled"));

    modeLabels[3] = createHeaderLabel(tr("Selected"));

    Q_ASSERT(NumModes == 4);

    for (int j = 0; j < NumStates; ++j)

        mainLayout->addWidget(stateLabels[j], j + 1, 0);

    for (int i = 0; i < NumModes; ++i) {

        mainLayout->addWidget(modeLabels[i], 0, i + 1);

        for (int j = 0; j < NumStates; ++j) {

            pixmapLabels[i][j] = createPixmapLabel();

            mainLayout->addWidget(pixmapLabels[i][j], j + 1, i + 1);

        }

    }

}

//! [0]

//! [1]

void IconPreviewArea::setIcon(const QIcon &icon)

{

    this->icon = icon;

    updatePixmapLabels();

}

//! [1]

//! [2]

void IconPreviewArea::setSize(const QSize &size)

{

    if (size != this->size) {

        this->size = size;

        updatePixmapLabels();

    }

}

//! [2]

//! [3]

QLabel *IconPreviewArea::createHeaderLabel(const QString &text)

{

    QLabel *label = new QLabel(tr("<b>%1</b>").arg(text));

    label->setAlignment(Qt::AlignCenter);

    return label;

}

//! [3]

//! [4]

QLabel *IconPreviewArea::createPixmapLabel()

{

    QLabel *label = new QLabel;

    label->setEnabled(false);

    label->setAlignment(Qt::AlignCenter);

    label->setFrameShape(QFrame::Box);

    label->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);

    label->setBackgroundRole(QPalette::Base);

    label->setAutoFillBackground(true);

    label->setMinimumSize(132, 132);

    return label;

}

//! [4]

//! [5]

void IconPreviewArea::updatePixmapLabels()

{

    for (int i = 0; i < NumModes; ++i) {

        QIcon::Mode mode;

        if (i == 0) {

            mode = QIcon::Normal;

        } else if (i == 1) {

            mode = QIcon::Active;

        } else if (i == 2) {

            mode = QIcon::Disabled;

        } else {

            mode = QIcon::Selected;

        }

        for (int j = 0; j < NumStates; ++j) {

            QIcon::State state = (j == 0) ? QIcon::Off : QIcon::On;

            QPixmap pixmap = icon.pixmap(size, mode, state);

            pixmapLabels[i][j]->setPixmap(pixmap);

            pixmapLabels[i][j]->setEnabled(!pixmap.isNull());

        }

    }

}

//! [5]