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#include "qprintpreviewdialog.h"

#include "qprintpreviewwidget.h"

#include <private/qprinter_p.h>

#include "private/qdialog_p.h"

#include <QtGui/qaction.h>

#include <QtGui/qboxlayout.h>

#include <QtGui/qcombobox.h>

#include <QtGui/qlabel.h>

#include <QtGui/qlineedit.h>

#include <QtGui/qpagesetupdialog.h>

#include <QtGui/qprinter.h>

#include <QtGui/qstyle.h>

#include <QtGui/qtoolbutton.h>

#include <QtGui/qvalidator.h>

#include <QtGui/qfiledialog.h>

#include <QtGui/qmainwindow.h>

#include <QtGui/qtoolbar.h>

#include <QtGui/qformlayout.h>

#include <QtCore/QCoreApplication>

#include <math.h>

#ifndef QT_NO_PRINTPREVIEWDIALOG

QT_BEGIN_NAMESPACE

namespace {

class QPrintPreviewMainWindow : public QMainWindow

{

public:

    QPrintPreviewMainWindow(QWidget *parent) : QMainWindow(parent) {}

    QMenu *createPopupMenu() { return 0; }

};

class ZoomFactorValidator : public QDoubleValidator

{

public:

    ZoomFactorValidator(QObject* parent)

        : QDoubleValidator(parent) {}

    ZoomFactorValidator(qreal bottom, qreal top, int decimals, QObject *parent)

        : QDoubleValidator(bottom, top, decimals, parent) {}

    State validate(QString &input, int &pos) const

    {

        bool replacePercent = false;

        if (input.endsWith(QLatin1Char('%'))) {

            input = input.left(input.length() - 1);

            replacePercent = true;

        }

        State state = QDoubleValidator::validate(input, pos);

        if (replacePercent)

            input += QLatin1Char('%');

        const int num_size = 4;

        if (state == Intermediate) {

            int i = input.indexOf(QLocale::system().decimalPoint());

            if ((i == -1 && input.size() > num_size)

                || (i != -1 && i > num_size))

                return Invalid;

        }

        return state;

    }

};

class LineEdit : public QLineEdit

{

    Q_OBJECT

public:

    LineEdit(QWidget* parent = 0)

        : QLineEdit(parent)

    {

        setContextMenuPolicy(Qt::NoContextMenu);

        connect(this, SIGNAL(returnPressed()), SLOT(handleReturnPressed()));

    }

protected:

    void focusInEvent(QFocusEvent *e)

    {

        origText = text();

        QLineEdit::focusInEvent(e);

    }

    void focusOutEvent(QFocusEvent *e)

    {

        if (isModified() && !hasAcceptableInput())

            setText(origText);

        QLineEdit::focusOutEvent(e);

    }

private slots:

    void handleReturnPressed()

    {

        origText = text();

    }

private:

    QString origText;

};

} // anonymous namespace

class QPrintPreviewDialogPrivate : public QDialogPrivate

{

    Q_DECLARE_PUBLIC(QPrintPreviewDialog)

public:

    QPrintPreviewDialogPrivate()

        : printDialog(0), ownPrinter(false),

          initialized(false) {}

    // private slots

    void _q_fit(QAction *action);

    void _q_zoomIn();

    void _q_zoomOut();

    void _q_navigate(QAction *action);

    void _q_setMode(QAction *action);

    void _q_pageNumEdited();

    void _q_print();

    void _q_pageSetup();

    void _q_previewChanged();

    void _q_zoomFactorChanged();

    void init(QPrinter *printer = 0);

    void populateScene();

    void layoutPages();

    void setupActions();

    void updateNavActions();

    void setFitting(bool on);

    bool isFitting();

    void updatePageNumLabel();

    void updateZoomFactor();

    QPrintDialog *printDialog;

    QPrintPreviewWidget *preview;

    QPrinter *printer;

    bool ownPrinter;

    bool initialized;

    // widgets:

    QLineEdit *pageNumEdit;

    QLabel *pageNumLabel;

    QComboBox *zoomFactor;

    // actions:

    QActionGroup* navGroup;

    QAction *nextPageAction;

    QAction *prevPageAction;

    QAction *firstPageAction;

    QAction *lastPageAction;

    QActionGroup* fitGroup;

    QAction *fitWidthAction;

    QAction *fitPageAction;

    QActionGroup* zoomGroup;

    QAction *zoomInAction;

    QAction *zoomOutAction;

    QActionGroup* orientationGroup;

    QAction *portraitAction;

    QAction *landscapeAction;

    QActionGroup* modeGroup;

    QAction *singleModeAction;

    QAction *facingModeAction;

    QAction *overviewModeAction;

    QActionGroup *printerGroup;

    QAction *printAction;

    QAction *pageSetupAction;

    QPointer<QObject> receiverToDisconnectOnClose;

    QByteArray memberToDisconnectOnClose;

};

void QPrintPreviewDialogPrivate::init(QPrinter *_printer)

{

    Q_Q(QPrintPreviewDialog);

    if (_printer) {

        preview = new QPrintPreviewWidget(_printer, q);

        printer = _printer;

    } else {

        ownPrinter = true;

        printer = new QPrinter;

        preview = new QPrintPreviewWidget(printer, q);

    }

    QObject::connect(preview, SIGNAL(paintRequested(QPrinter*)), q, SIGNAL(paintRequested(QPrinter*)));

    QObject::connect(preview, SIGNAL(previewChanged()), q, SLOT(_q_previewChanged()));

    setupActions();

    pageNumEdit = new LineEdit;

    pageNumEdit->setAlignment(Qt::AlignRight);

    pageNumEdit->setSizePolicy(QSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed));

    pageNumLabel = new QLabel;

    QObject::connect(pageNumEdit, SIGNAL(editingFinished()), q, SLOT(_q_pageNumEdited()));

    zoomFactor = new QComboBox;

    zoomFactor->setEditable(true);

    zoomFactor->setMinimumContentsLength(7);

    zoomFactor->setInsertPolicy(QComboBox::NoInsert);

    LineEdit *zoomEditor = new LineEdit;

    zoomEditor->setValidator(new ZoomFactorValidator(1, 1000, 1, zoomEditor));

    zoomFactor->setLineEdit(zoomEditor);

    static const short factorsX2[] = { 25, 50, 100, 200, 250, 300, 400, 800, 1600 };

    for (int i = 0; i < int(sizeof(factorsX2) / sizeof(factorsX2[0])); ++i)

        zoomFactor->addItem(QPrintPreviewDialog::tr("%1%").arg(factorsX2[i] / 2.0));

    QObject::connect(zoomFactor->lineEdit(), SIGNAL(editingFinished()),

                     q, SLOT(_q_zoomFactorChanged()));

    QObject::connect(zoomFactor, SIGNAL(currentIndexChanged(int)),

                     q, SLOT(_q_zoomFactorChanged()));

    QPrintPreviewMainWindow *mw = new QPrintPreviewMainWindow(q);

    QToolBar *toolbar = new QToolBar(mw);

    toolbar->addAction(fitWidthAction);

    toolbar->addAction(fitPageAction);

    toolbar->addSeparator();

    toolbar->addWidget(zoomFactor);

    toolbar->addAction(zoomOutAction);

    toolbar->addAction(zoomInAction);

    toolbar->addSeparator();

    toolbar->addAction(portraitAction);

    toolbar->addAction(landscapeAction);

    toolbar->addSeparator();

    toolbar->addAction(firstPageAction);

    toolbar->addAction(prevPageAction);

    // this is to ensure the label text and the editor text are

    // aligned in all styles - the extra QVBoxLayout is a workaround

    // for bug in QFormLayout

    QWidget *pageEdit = new QWidget(toolbar);

    QVBoxLayout *vboxLayout = new QVBoxLayout;

    vboxLayout->setContentsMargins(0, 0, 0, 0);

    QFormLayout *formLayout = new QFormLayout;

    formLayout->setWidget(0, QFormLayout::LabelRole, pageNumEdit);

    formLayout->setWidget(0, QFormLayout::FieldRole, pageNumLabel);

    vboxLayout->addLayout(formLayout);

    vboxLayout->setAlignment(Qt::AlignVCenter);

    pageEdit->setLayout(vboxLayout);

    toolbar->addWidget(pageEdit);

    toolbar->addAction(nextPageAction);

    toolbar->addAction(lastPageAction);

    toolbar->addSeparator();

    toolbar->addAction(singleModeAction);

    toolbar->addAction(facingModeAction);

    toolbar->addAction(overviewModeAction);

    toolbar->addSeparator();

    toolbar->addAction(pageSetupAction);

    toolbar->addAction(printAction);

    // Cannot use the actions' triggered signal here, since it doesn't autorepeat

    QToolButton *zoomInButton = static_cast<QToolButton *>(toolbar->widgetForAction(zoomInAction));

    QToolButton *zoomOutButton = static_cast<QToolButton *>(toolbar->widgetForAction(zoomOutAction));

    zoomInButton->setAutoRepeat(true);

    zoomInButton->setAutoRepeatInterval(200);

    zoomInButton->setAutoRepeatDelay(200);

    zoomOutButton->setAutoRepeat(true);

    zoomOutButton->setAutoRepeatInterval(200);

    zoomOutButton->setAutoRepeatDelay(200);

    QObject::connect(zoomInButton, SIGNAL(clicked()), q, SLOT(_q_zoomIn()));

    QObject::connect(zoomOutButton, SIGNAL(clicked()), q, SLOT(_q_zoomOut()));

    mw->addToolBar(toolbar);

    mw->setCentralWidget(preview);

    // QMainWindows are always created as top levels, force it to be a

    // plain widget

    mw->setParent(q, Qt::Widget);

    QVBoxLayout *topLayout = new QVBoxLayout;

    topLayout->addWidget(mw);

    topLayout->setMargin(0);

    q->setLayout(topLayout);

    QString caption = QCoreApplication::translate("QPrintPreviewDialog", "Print Preview");

    if (!printer->docName().isEmpty())

        caption += QString::fromLatin1(": ") + printer->docName();

    q->setWindowTitle(caption);

    if (!printer->isValid()

#if defined(Q_WS_WIN) || defined(Q_WS_MAC)

        || printer->outputFormat() != QPrinter::NativeFormat

#endif

        )

        pageSetupAction->setEnabled(false);

    preview->setFocus();

}

static inline void qt_setupActionIcon(QAction *action, const QLatin1String &name)

{

    QLatin1String imagePrefix(":/trolltech/dialogs/qprintpreviewdialog/images/");

    QIcon icon;

    icon.addFile(imagePrefix + name + QLatin1String("-24.png"), QSize(24, 24));

    icon.addFile(imagePrefix + name + QLatin1String("-32.png"), QSize(32, 32));

    action->setIcon(icon);

}

void QPrintPreviewDialogPrivate::setupActions()

{

    Q_Q(QPrintPreviewDialog);

    // Navigation

    navGroup = new QActionGroup(q);

    navGroup->setExclusive(false);

    nextPageAction = navGroup->addAction(QCoreApplication::translate("QPrintPreviewDialog", "Next page"));

    prevPageAction = navGroup->addAction(QCoreApplication::translate("QPrintPreviewDialog", "Previous page"));

    firstPageAction = navGroup->addAction(QCoreApplication::translate("QPrintPreviewDialog", "First page"));

    lastPageAction = navGroup->addAction(QCoreApplication::translate("QPrintPreviewDialog", "Last page"));

    qt_setupActionIcon(nextPageAction, QLatin1String("go-next"));

    qt_setupActionIcon(prevPageAction, QLatin1String("go-previous"));

    qt_setupActionIcon(firstPageAction, QLatin1String("go-first"));

    qt_setupActionIcon(lastPageAction, QLatin1String("go-last"));

    QObject::connect(navGroup, SIGNAL(triggered(QAction*)), q, SLOT(_q_navigate(QAction*)));

    fitGroup = new QActionGroup(q);

    fitWidthAction = fitGroup->addAction(QCoreApplication::translate("QPrintPreviewDialog", "Fit width"));

    fitPageAction = fitGroup->addAction(QCoreApplication::translate("QPrintPreviewDialog", "Fit page"));

    fitWidthAction->setObjectName(QLatin1String("fitWidthAction"));

    fitPageAction->setObjectName(QLatin1String("fitPageAction"));

    fitWidthAction->setCheckable(true);

    fitPageAction->setCheckable(true);

    qt_setupActionIcon(fitWidthAction, QLatin1String("fit-width"));

    qt_setupActionIcon(fitPageAction, QLatin1String("fit-page"));

    QObject::connect(fitGroup, SIGNAL(triggered(QAction*)), q, SLOT(_q_fit(QAction*)));

    // Zoom

    zoomGroup = new QActionGroup(q);

    zoomInAction = zoomGroup->addAction(QCoreApplication::translate("QPrintPreviewDialog", "Zoom in"));

    zoomOutAction = zoomGroup->addAction(QCoreApplication::translate("QPrintPreviewDialog", "Zoom out"));

    qt_setupActionIcon(zoomInAction, QLatin1String("zoom-in"));

    qt_setupActionIcon(zoomOutAction, QLatin1String("zoom-out"));

    // Portrait/Landscape

    orientationGroup = new QActionGroup(q);

    portraitAction = orientationGroup->addAction(QCoreApplication::translate("QPrintPreviewDialog", "Portrait"));

    landscapeAction = orientationGroup->addAction(QCoreApplication::translate("QPrintPreviewDialog", "Landscape"));

    portraitAction->setCheckable(true);

    landscapeAction->setCheckable(true);

    qt_setupActionIcon(portraitAction, QLatin1String("layout-portrait"));

    qt_setupActionIcon(landscapeAction, QLatin1String("layout-landscape"));

    QObject::connect(portraitAction, SIGNAL(triggered(bool)), preview, SLOT(setPortraitOrientation()));

    QObject::connect(landscapeAction, SIGNAL(triggered(bool)), preview, SLOT(setLandscapeOrientation()));

    // Display mode

    modeGroup = new QActionGroup(q);

    singleModeAction = modeGroup->addAction(QCoreApplication::translate("QPrintPreviewDialog", "Show single page"));

    facingModeAction = modeGroup->addAction(QCoreApplication::translate("QPrintPreviewDialog", "Show facing pages"));

    overviewModeAction = modeGroup->addAction(QCoreApplication::translate("QPrintPreviewDialog", "Show overview of all pages"));

    qt_setupActionIcon(singleModeAction, QLatin1String("view-page-one"));

    qt_setupActionIcon(facingModeAction, QLatin1String("view-page-sided"));

    qt_setupActionIcon(overviewModeAction, QLatin1String("view-page-multi"));

    singleModeAction->setObjectName(QLatin1String("singleModeAction"));

    facingModeAction->setObjectName(QLatin1String("facingModeAction"));

    overviewModeAction->setObjectName(QLatin1String("overviewModeAction"));

    singleModeAction->setCheckable(true);

    facingModeAction->setCheckable(true);

    overviewModeAction->setCheckable(true);

    QObject::connect(modeGroup, SIGNAL(triggered(QAction*)), q, SLOT(_q_setMode(QAction*)));

    // Print

    printerGroup = new QActionGroup(q);

    printAction = printerGroup->addAction(QCoreApplication::translate("QPrintPreviewDialog", "Print"));

    pageSetupAction = printerGroup->addAction(QCoreApplication::translate("QPrintPreviewDialog", "Page setup"));

    qt_setupActionIcon(printAction, QLatin1String("print"));

    qt_setupActionIcon(pageSetupAction, QLatin1String("page-setup"));

    QObject::connect(printAction, SIGNAL(triggered(bool)), q, SLOT(_q_print()));

    QObject::connect(pageSetupAction, SIGNAL(triggered(bool)), q, SLOT(_q_pageSetup()));

    // Initial state:

    fitPageAction->setChecked(true);

    singleModeAction->setChecked(true);

    if (preview->orientation() == QPrinter::Portrait)

        portraitAction->setChecked(true);

    else

        landscapeAction->setChecked(true);

}

bool QPrintPreviewDialogPrivate::isFitting()

{

    return (fitGroup->isExclusive()

            && (fitWidthAction->isChecked() || fitPageAction->isChecked()));

}

void QPrintPreviewDialogPrivate::setFitting(bool on)

{

    if (isFitting() == on)

        return;

    fitGroup->setExclusive(on);

    if (on) {

        QAction* action = fitWidthAction->isChecked() ? fitWidthAction : fitPageAction;

        action->setChecked(true);

        if (fitGroup->checkedAction() != action) {

            // work around exclusitivity problem

            fitGroup->removeAction(action);

            fitGroup->addAction(action);

        }

    } else {

        fitWidthAction->setChecked(false);

        fitPageAction->setChecked(false);

    }

}

void QPrintPreviewDialogPrivate::updateNavActions()

{

    int curPage = preview->currentPage();

    int numPages = preview->pageCount();

    nextPageAction->setEnabled(curPage < numPages);

    prevPageAction->setEnabled(curPage > 1);

    firstPageAction->setEnabled(curPage > 1);

    lastPageAction->setEnabled(curPage < numPages);

    pageNumEdit->setText(QString::number(curPage));

}

void QPrintPreviewDialogPrivate::updatePageNumLabel()

{

    Q_Q(QPrintPreviewDialog);

    int numPages = preview->pageCount();

    int maxChars = QString::number(numPages).length();

    pageNumLabel->setText(QString::fromLatin1("/ %1").arg(numPages));

    int cyphersWidth = q->fontMetrics().width(QString().fill(QLatin1Char('8'), maxChars));

    int maxWidth = pageNumEdit->minimumSizeHint().width() + cyphersWidth;

    pageNumEdit->setMinimumWidth(maxWidth);

    pageNumEdit->setMaximumWidth(maxWidth);

    pageNumEdit->setValidator(new QIntValidator(1, numPages, pageNumEdit));

    // any old one will be deleted later along with its parent pageNumEdit

}

void QPrintPreviewDialogPrivate::updateZoomFactor()

{

    zoomFactor->lineEdit()->setText(QString().sprintf("%.1f%%", preview->zoomFactor()*100));

}

void QPrintPreviewDialogPrivate::_q_fit(QAction* action)

{

    setFitting(true);

    if (action == fitPageAction)

        preview->fitInView();

    else

        preview->fitToWidth();

}

void QPrintPreviewDialogPrivate::_q_zoomIn()

{

    setFitting(false);

    preview->zoomIn();

    updateZoomFactor();

}

void QPrintPreviewDialogPrivate::_q_zoomOut()

{

    setFitting(false);

    preview->zoomOut();

    updateZoomFactor();

}

void QPrintPreviewDialogPrivate::_q_pageNumEdited()

{

    bool ok = false;

    int res = pageNumEdit->text().toInt(&ok);

    if (ok)

        preview->setCurrentPage(res);

}

void QPrintPreviewDialogPrivate::_q_navigate(QAction* action)

{

    int curPage = preview->currentPage();

    if (action == prevPageAction)

        preview->setCurrentPage(curPage - 1);

    else if (action == nextPageAction)

        preview->setCurrentPage(curPage + 1);

    else if (action == firstPageAction)

        preview->setCurrentPage(1);