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#include <QtGui>

#include "iconpreviewarea.h"

#include "iconsizespinbox.h"

#include "imagedelegate.h"

#include "mainwindow.h"

//! [0]

MainWindow::MainWindow()

{

    centralWidget = new QWidget;

    setCentralWidget(centralWidget);

    createPreviewGroupBox();

    createImagesGroupBox();

    createIconSizeGroupBox();

    createActions();

    createMenus();

    createContextMenu();

    QGridLayout *mainLayout = new QGridLayout;

    mainLayout->addWidget(previewGroupBox, 0, 0, 1, 2);

    mainLayout->addWidget(imagesGroupBox, 1, 0);

    mainLayout->addWidget(iconSizeGroupBox, 1, 1);

    centralWidget->setLayout(mainLayout);

    setWindowTitle(tr("Icons"));

    checkCurrentStyle();

    otherRadioButton->click();

    resize(minimumSizeHint());

}

//! [0]

//! [1]

void MainWindow::about()

{

    QMessageBox::about(this, tr("About Icons"),

            tr("The <b>Icons</b> example illustrates how Qt renders an icon in "

               "different modes (active, normal, disabled, and selected) and "

               "states (on and off) based on a set of images."));

}

//! [1]

//! [2]

void MainWindow::changeStyle(bool checked)

{

    if (!checked)

        return;

    QAction *action = qobject_cast<QAction *>(sender());

//! [2] //! [3]

    QStyle *style = QStyleFactory::create(action->data().toString());

//! [3] //! [4]

    Q_ASSERT(style);

    QApplication::setStyle(style);

    smallRadioButton->setText(tr("Small (%1 x %1)")

            .arg(style->pixelMetric(QStyle::PM_SmallIconSize)));

    largeRadioButton->setText(tr("Large (%1 x %1)")

            .arg(style->pixelMetric(QStyle::PM_LargeIconSize)));

    toolBarRadioButton->setText(tr("Toolbars (%1 x %1)")

            .arg(style->pixelMetric(QStyle::PM_ToolBarIconSize)));

    listViewRadioButton->setText(tr("List views (%1 x %1)")

            .arg(style->pixelMetric(QStyle::PM_ListViewIconSize)));

    iconViewRadioButton->setText(tr("Icon views (%1 x %1)")

            .arg(style->pixelMetric(QStyle::PM_IconViewIconSize)));

    tabBarRadioButton->setText(tr("Tab bars (%1 x %1)")

            .arg(style->pixelMetric(QStyle::PM_TabBarIconSize)));

    changeSize();

}

//! [4]

//! [5]

void MainWindow::changeSize(bool checked)

{

    if (!checked)

        return;

    int extent;

    if (otherRadioButton->isChecked()) {

        extent = otherSpinBox->value();

    } else {

        QStyle::PixelMetric metric;

        if (smallRadioButton->isChecked()) {

            metric = QStyle::PM_SmallIconSize;

        } else if (largeRadioButton->isChecked()) {

            metric = QStyle::PM_LargeIconSize;

        } else if (toolBarRadioButton->isChecked()) {

            metric = QStyle::PM_ToolBarIconSize;

        } else if (listViewRadioButton->isChecked()) {

            metric = QStyle::PM_ListViewIconSize;

        } else if (iconViewRadioButton->isChecked()) {

            metric = QStyle::PM_IconViewIconSize;

        } else {

            metric = QStyle::PM_TabBarIconSize;

        }

        extent = QApplication::style()->pixelMetric(metric);

    }

    previewArea->setSize(QSize(extent, extent));

    otherSpinBox->setEnabled(otherRadioButton->isChecked());

}

//! [5]

//! [6]

void MainWindow::changeIcon()

{

    QIcon icon;

    for (int row = 0; row < imagesTable->rowCount(); ++row) {

        QTableWidgetItem *item0 = imagesTable->item(row, 0);

        QTableWidgetItem *item1 = imagesTable->item(row, 1);

        QTableWidgetItem *item2 = imagesTable->item(row, 2);

        if (item0->checkState() == Qt::Checked) {

            QIcon::Mode mode;

            if (item1->text() == tr("Normal")) {

                mode = QIcon::Normal;

            } else if (item1->text() == tr("Active")) {

                mode = QIcon::Active;

            } else if (item1->text() == tr("Disabled")) {

                mode = QIcon::Disabled;

            } else {

                mode = QIcon::Selected;

            }

            QIcon::State state;

            if (item2->text() == tr("On")) {

                state = QIcon::On;

            } else {

                state = QIcon::Off;

//! [6] //! [7]

            }

//! [7]

//! [8]

            QString fileName = item0->data(Qt::UserRole).toString();

            QImage image(fileName);

            if (!image.isNull())

                icon.addPixmap(QPixmap::fromImage(image), mode, state);

//! [8] //! [9]

        }

//! [9] //! [10]

    }

//! [10]

//! [11]

    previewArea->setIcon(icon);

}

//! [11]

//! [12]

void MainWindow::addImages()

{

    QStringList fileNames = QFileDialog::getOpenFileNames(this,

                                    tr("Open Images"), "",

                                    tr("Images (*.png *.xpm *.jpg);;"

                                       "All Files (*)"));

    if (!fileNames.isEmpty()) {

        foreach (QString fileName, fileNames) {

            int row = imagesTable->rowCount();

            imagesTable->setRowCount(row + 1);

//! [12]

//! [13]

            QString imageName = QFileInfo(fileName).baseName();

//! [13] //! [14]

            QTableWidgetItem *item0 = new QTableWidgetItem(imageName);

            item0->setData(Qt::UserRole, fileName);

            item0->setFlags(item0->flags() & ~Qt::ItemIsEditable);

//! [14]

//! [15]

            QTableWidgetItem *item1 = new QTableWidgetItem(tr("Normal"));

//! [15] //! [16]

            QTableWidgetItem *item2 = new QTableWidgetItem(tr("Off"));

            if (guessModeStateAct->isChecked()) {

                if (fileName.contains("_act")) {

                    item1->setText(tr("Active"));

                } else if (fileName.contains("_dis")) {

                    item1->setText(tr("Disabled"));

                } else if (fileName.contains("_sel")) {

                    item1->setText(tr("Selected"));

                }

                if (fileName.contains("_on"))

                    item2->setText(tr("On"));

//! [16] //! [17]

            }

//! [17]

//! [18]

            imagesTable->setItem(row, 0, item0);

//! [18] //! [19]

            imagesTable->setItem(row, 1, item1);

            imagesTable->setItem(row, 2, item2);

            imagesTable->openPersistentEditor(item1);

            imagesTable->openPersistentEditor(item2);

            item0->setCheckState(Qt::Checked);

        }

    }

}

//! [19]

//! [20]

void MainWindow::removeAllImages()

{

    imagesTable->setRowCount(0);

    changeIcon();

}

//! [20]

void MainWindow::createPreviewGroupBox()

{

    previewGroupBox = new QGroupBox(tr("Preview"));

    previewArea = new IconPreviewArea;

    QVBoxLayout *layout = new QVBoxLayout;

    layout->addWidget(previewArea);

    previewGroupBox->setLayout(layout);

}

//! [21]

void MainWindow::createImagesGroupBox()

{

    imagesGroupBox = new QGroupBox(tr("Images"));

    imagesTable = new QTableWidget;

    imagesTable->setSelectionMode(QAbstractItemView::NoSelection);

    imagesTable->setItemDelegate(new ImageDelegate(this));

//! [21]

//! [22]

    QStringList labels;

//! [22] //! [23]

    labels << tr("Image") << tr("Mode") << tr("State");

    imagesTable->horizontalHeader()->setDefaultSectionSize(90);

    imagesTable->setColumnCount(3);

    imagesTable->setHorizontalHeaderLabels(labels);

    imagesTable->horizontalHeader()->setResizeMode(0, QHeaderView::Stretch);

    imagesTable->horizontalHeader()->setResizeMode(1, QHeaderView::Fixed);

    imagesTable->horizontalHeader()->setResizeMode(2, QHeaderView::Fixed);

    imagesTable->verticalHeader()->hide();

//! [23]

//! [24]

    connect(imagesTable, SIGNAL(itemChanged(QTableWidgetItem*)),

//! [24] //! [25]

            this, SLOT(changeIcon()));

    QVBoxLayout *layout = new QVBoxLayout;

    layout->addWidget(imagesTable);

    imagesGroupBox->setLayout(layout);

}

//! [25]

//! [26]

void MainWindow::createIconSizeGroupBox()

{

    iconSizeGroupBox = new QGroupBox(tr("Icon Size"));

    smallRadioButton = new QRadioButton;

    largeRadioButton = new QRadioButton;

    toolBarRadioButton = new QRadioButton;

    listViewRadioButton = new QRadioButton;

    iconViewRadioButton = new QRadioButton;

    tabBarRadioButton = new QRadioButton;

    otherRadioButton = new QRadioButton(tr("Other:"));

    otherSpinBox = new IconSizeSpinBox;

    otherSpinBox->setRange(8, 128);

    otherSpinBox->setValue(64);

//! [26]

//! [27]

    connect(smallRadioButton, SIGNAL(toggled(bool)),

            this, SLOT(changeSize(bool)));

    connect(largeRadioButton, SIGNAL(toggled(bool)),

            this, SLOT(changeSize(bool)));

    connect(toolBarRadioButton, SIGNAL(toggled(bool)),

            this, SLOT(changeSize(bool)));

    connect(listViewRadioButton, SIGNAL(toggled(bool)),

            this, SLOT(changeSize(bool)));

    connect(iconViewRadioButton, SIGNAL(toggled(bool)),

            this, SLOT(changeSize(bool)));

    connect(tabBarRadioButton, SIGNAL(toggled(bool)),

            this, SLOT(changeSize(bool)));

    connect(otherRadioButton, SIGNAL(toggled(bool)),

            this, SLOT(changeSize(bool)));

    connect(otherSpinBox, SIGNAL(valueChanged(int)), this, SLOT(changeSize()));

    QHBoxLayout *otherSizeLayout = new QHBoxLayout;

    otherSizeLayout->addWidget(otherRadioButton);

    otherSizeLayout->addWidget(otherSpinBox);

    otherSizeLayout->addStretch();

    QGridLayout *layout = new QGridLayout;

    layout->addWidget(smallRadioButton, 0, 0);

    layout->addWidget(largeRadioButton, 1, 0);

    layout->addWidget(toolBarRadioButton, 2, 0);

    layout->addWidget(listViewRadioButton, 0, 1);

    layout->addWidget(iconViewRadioButton, 1, 1);

    layout->addWidget(tabBarRadioButton, 2, 1);

    layout->addLayout(otherSizeLayout, 3, 0, 1, 2);

    layout->setRowStretch(4, 1);

    iconSizeGroupBox->setLayout(layout);

}

//! [27]

//! [28]

void MainWindow::createActions()

{

    addImagesAct = new QAction(tr("&Add Images..."), this);

    addImagesAct->setShortcut(tr("Ctrl+A"));

    connect(addImagesAct, SIGNAL(triggered()), this, SLOT(addImages()));

    removeAllImagesAct = new QAction(tr("&Remove All Images"), this);

    removeAllImagesAct->setShortcut(tr("Ctrl+R"));

    connect(removeAllImagesAct, SIGNAL(triggered()),

            this, SLOT(removeAllImages()));

    exitAct = new QAction(tr("&Quit"), this);

    exitAct->setShortcuts(QKeySequence::Quit);

    connect(exitAct, SIGNAL(triggered()), this, SLOT(close()));

    styleActionGroup = new QActionGroup(this);

    foreach (QString styleName, QStyleFactory::keys()) {

        QAction *action = new QAction(styleActionGroup);

        action->setText(tr("%1 Style").arg(styleName));

        action->setData(styleName);

        action->setCheckable(true);

        connect(action, SIGNAL(triggered(bool)), this, SLOT(changeStyle(bool)));

    }

    guessModeStateAct = new QAction(tr("&Guess Image Mode/State"), this);

    guessModeStateAct->setCheckable(true);

    guessModeStateAct->setChecked(true);

    aboutAct = new QAction(tr("&About"), this);

    connect(aboutAct, SIGNAL(triggered()), this, SLOT(about()));

    aboutQtAct = new QAction(tr("About &Qt"), this);

    connect(aboutQtAct, SIGNAL(triggered()), qApp, SLOT(aboutQt()));

}

//! [28]

//! [29]

void MainWindow::createMenus()

{

    fileMenu = menuBar()->addMenu(tr("&File"));

    fileMenu->addAction(addImagesAct);

    fileMenu->addAction(removeAllImagesAct);

    fileMenu->addSeparator();

    fileMenu->addAction(exitAct);

    viewMenu = menuBar()->addMenu(tr("&View"));

    foreach (QAction *action, styleActionGroup->actions())

        viewMenu->addAction(action);

    viewMenu->addSeparator();

    viewMenu->addAction(guessModeStateAct);

    menuBar()->addSeparator();

    helpMenu = menuBar()->addMenu(tr("&Help"));

    helpMenu->addAction(aboutAct);

    helpMenu->addAction(aboutQtAct);

}

//! [29]

//! [30]

void MainWindow::createContextMenu()

{

    imagesTable->setContextMenuPolicy(Qt::ActionsContextMenu);

    imagesTable->addAction(addImagesAct);

    imagesTable->addAction(removeAllImagesAct);

}

//! [30]

//! [31]

void MainWindow::checkCurrentStyle()

{

    foreach (QAction *action, styleActionGroup->actions()) {

        QString styleName = action->data().toString();

        QStyle *candidate = QStyleFactory::create(styleName);

        Q_ASSERT(candidate);

        if (candidate->metaObject()->className()

                == QApplication::style()->metaObject()->className()) {

            action->trigger();

            return;

        }

        delete candidate;

    }

}

//! [31]