~ubuntu-branches/ubuntu/quantal/gwenview/quantal-proposed

// vim: set tabstop=4 shiftwidth=4 expandtab:

/*

Gwenview: an image viewer

Copyright 2007 Aurélien Gâteau <agateau@kde.org>

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.

This program 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 this program; if not, write to the Free Software

Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

*/

// Self

#include "savebar.moc"

// Qt

#include <QHBoxLayout>

#include <QLabel>

#include <QToolButton>

#include <QToolTip>

// KDE

#include <KActionCollection>

#include <KColorScheme>

#include <KDebug>

#include <KIcon>

#include <KIconLoader>

#include <KLocale>

#include <KUrl>

// Local

#include "lib/document/documentfactory.h"

#include "lib/gwenviewconfig.h"

#include "lib/memoryutils.h"

#include "lib/paintutils.h"

namespace Gwenview

{

QToolButton* createToolButton()

{

    QToolButton* button = new QToolButton;

    button->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);

    button->hide();

    return button;

}

struct SaveBarPrivate

{

    SaveBar* q;

    KActionCollection* mActionCollection;

    QWidget* mSaveBarWidget;

    QWidget* mTopRowWidget;

    QToolButton* mUndoButton;

    QToolButton* mRedoButton;

    QToolButton* mSaveCurrentUrlButton;

    QToolButton* mSaveAsButton;

    QToolButton* mSaveAllButton;

    QToolButton* mSaveAllFullScreenButton;

    QLabel* mMessageLabel;

    QLabel* mActionsLabel;

    QFrame* mTooManyChangesFrame;

    KUrl mCurrentUrl;

    bool mFullScreenMode;

    void createTooManyChangesFrame()

    {

        mTooManyChangesFrame = new QFrame;

        // Icon

        QLabel* iconLabel = new QLabel;

        QPixmap pix = KIconLoader::global()->loadIcon(

                          "dialog-warning", KIconLoader::Dialog, KIconLoader::SizeSmall);

        iconLabel->setPixmap(pix);

        // Text label

        QLabel* textLabel = new QLabel;

        textLabel->setText(

            i18n("You have modified many images. To avoid memory problems, you should save your changes.")

        );

        mSaveAllFullScreenButton = createToolButton();

        // Layout

        QHBoxLayout* layout = new QHBoxLayout(mTooManyChangesFrame);

        layout->setMargin(0);

        layout->addWidget(iconLabel);

        layout->addWidget(textLabel);

        layout->addWidget(mSaveAllFullScreenButton);

        mTooManyChangesFrame->hide();

        // CSS

        KColorScheme scheme(mSaveBarWidget->palette().currentColorGroup(), KColorScheme::Window);

        QColor warningBackgroundColor = scheme.background(KColorScheme::NegativeBackground).color();

        QColor warningBorderColor = PaintUtils::adjustedHsv(warningBackgroundColor, 0, 150, 0);

        QColor warningColor = scheme.foreground(KColorScheme::NegativeText).color();

        QString css =

            ".QFrame {"

            "	background-color: %1;"

            "	border: 1px solid %2;"

            "	border-radius: 4px;"

            "	padding: 3px;"

            "}"

            ".QFrame QLabel {"

            "	color: %3;"

            "}"

            ;

        css = css

              .arg(warningBackgroundColor.name())

              .arg(warningBorderColor.name())

              .arg(warningColor.name())

              ;

        mTooManyChangesFrame->setStyleSheet(css);

    }

    void applyNormalStyleSheet()

    {

        QColor bgColor = QToolTip::palette().base().color();

        QColor borderColor = PaintUtils::adjustedHsv(bgColor, 0, 150, 0);

        QColor fgColor = QToolTip::palette().text().color();

        QString css =

            "#saveBarWidget {"

            "	background-color: %1;"

            "	border-top: 1px solid %2;"

            "	border-bottom: 1px solid %2;"

            "	color: %3;"

            "}"

            ;

        css = css

              .arg(bgColor.name())

              .arg(borderColor.name())

              .arg(fgColor.name())

              ;

        mSaveBarWidget->setStyleSheet(css);

    }

    void applyFullScreenStyleSheet()

    {

        QString css =

            "#saveBarWidget {"

            "	background-color: #333;"

            "}";

        mSaveBarWidget->setStyleSheet(css);

    }

    void updateTooManyChangesFrame(const QList<KUrl>& list)

    {

        qreal maxPercentageOfMemoryUsage = GwenviewConfig::percentageOfMemoryUsageWarning();

        qulonglong maxMemoryUsage = MemoryUtils::getTotalMemory() * maxPercentageOfMemoryUsage;

        qulonglong memoryUsage = 0;

        Q_FOREACH(const KUrl & url, list) {

            Document::Ptr doc = DocumentFactory::instance()->load(url);

            memoryUsage += doc->memoryUsage();

        }

        mTooManyChangesFrame->setVisible(memoryUsage > maxMemoryUsage);

    }

    void updateTopRowWidget(const QList<KUrl>& lst)

    {

        QStringList links;

        QString message;

        if (lst.contains(mCurrentUrl)) {

            message = i18n("Current image modified");

            mUndoButton->show();

            mRedoButton->show();

            if (lst.size() > 1) {

                QString previous = i18n("Previous modified image");

                QString next = i18n("Next modified image");

                if (mCurrentUrl == lst[0]) {

                    links << previous;

                } else {

                    links << QString("<a href='previous'>%1</a>").arg(previous);

                }

                if (mCurrentUrl == lst[lst.size() - 1]) {

                    links << next;

                } else {

                    links << QString("<a href='next'>%1</a>").arg(next);

                }

            }

        } else {

            mUndoButton->hide();

            mRedoButton->hide();

            message = i18np("One image modified", "%1 images modified", lst.size());

            if (lst.size() > 1) {

                links << QString("<a href='first'>%1</a>").arg(i18n("Go to first modified image"));

            } else {

                links << QString("<a href='first'>%1</a>").arg(i18n("Go to it"));

            }

        }

        mSaveCurrentUrlButton->setVisible(lst.contains(mCurrentUrl));

        mSaveAsButton->setVisible(lst.contains(mCurrentUrl));

        mSaveAllButton->setVisible(lst.size() >= 1);

        mMessageLabel->setText(message);

        mActionsLabel->setText(links.join(" | "));

    }

    void updateWidgetSizes()

    {

        QVBoxLayout* layout = static_cast<QVBoxLayout*>(mSaveBarWidget->layout());

        int topRowHeight = mFullScreenMode ? 0 : mTopRowWidget->height();

        int bottomRowHeight = mTooManyChangesFrame->isVisibleTo(mSaveBarWidget) ? mTooManyChangesFrame->sizeHint().height() : 0;

        int height = 2 * layout->margin() + topRowHeight + bottomRowHeight;

        if (topRowHeight > 0 && bottomRowHeight > 0) {

            height += layout->spacing();

        }

        mSaveBarWidget->setFixedHeight(height);

    }

};

SaveBar::SaveBar(QWidget* parent, KActionCollection* actionCollection)

: SlideContainer(parent)

, d(new SaveBarPrivate)

{

    d->q = this;

    d->mFullScreenMode = false;

    d->mActionCollection = actionCollection;

    d->mSaveBarWidget = new QWidget();

    d->mSaveBarWidget->setObjectName(QLatin1String("saveBarWidget"));

    d->applyNormalStyleSheet();

    d->mMessageLabel = new QLabel;

    d->mMessageLabel->setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Fixed);

    d->mUndoButton = createToolButton();

    d->mRedoButton = createToolButton();

    d->mSaveCurrentUrlButton = createToolButton();

    d->mSaveAsButton = createToolButton();

    d->mSaveAllButton = createToolButton();

    d->mActionsLabel = new QLabel;

    d->mActionsLabel->setAlignment(Qt::AlignCenter);

    d->mActionsLabel->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);

    d->createTooManyChangesFrame();

    // Setup top row

    d->mTopRowWidget = new QWidget;

    QHBoxLayout* rowLayout = new QHBoxLayout(d->mTopRowWidget);

    rowLayout->addWidget(d->mMessageLabel);

    rowLayout->addWidget(d->mUndoButton);

    rowLayout->addWidget(d->mRedoButton);

    rowLayout->addWidget(d->mActionsLabel);

    rowLayout->addWidget(d->mSaveCurrentUrlButton);

    rowLayout->addWidget(d->mSaveAsButton);

    rowLayout->addWidget(d->mSaveAllButton);

    rowLayout->setMargin(0);

    // Setup bottom row

    QHBoxLayout* bottomRowLayout = new QHBoxLayout;

    bottomRowLayout->addStretch();

    bottomRowLayout->addWidget(d->mTooManyChangesFrame);

    bottomRowLayout->addStretch();

    // Gather everything together

    QVBoxLayout* layout = new QVBoxLayout(d->mSaveBarWidget);

    layout->addWidget(d->mTopRowWidget);

    layout->addLayout(bottomRowLayout);

    layout->setMargin(3);

    layout->setSpacing(3);

    setContent(d->mSaveBarWidget);

    connect(DocumentFactory::instance(), SIGNAL(modifiedDocumentListChanged()),

            SLOT(updateContent()));

    connect(d->mActionsLabel, SIGNAL(linkActivated(QString)),

            SLOT(triggerAction(QString)));

}

SaveBar::~SaveBar()

{

    delete d;

}

void SaveBar::initActionDependentWidgets()

{

    d->mUndoButton->setDefaultAction(d->mActionCollection->action("edit_undo"));

    d->mRedoButton->setDefaultAction(d->mActionCollection->action("edit_redo"));

    d->mSaveCurrentUrlButton->setDefaultAction(d->mActionCollection->action("file_save"));

    d->mSaveAsButton->setDefaultAction(d->mActionCollection->action("file_save_as"));

    // FIXME: Not using an action for now

    d->mSaveAllButton->setText(i18n("Save All"));

    d->mSaveAllButton->setIcon(KIcon("document-save-all"));

    connect(d->mSaveAllButton, SIGNAL(clicked()),

            SIGNAL(requestSaveAll()));

    d->mSaveAllFullScreenButton->setText(i18n("Save All"));

    connect(d->mSaveAllFullScreenButton, SIGNAL(clicked()),

            SIGNAL(requestSaveAll()));

    int height = d->mUndoButton->sizeHint().height();

    d->mTopRowWidget->setFixedHeight(height);

    d->updateWidgetSizes();

}

void SaveBar::setFullScreenMode(bool value)

{

    d->mFullScreenMode = value;

    d->mSaveAllFullScreenButton->setVisible(value);

    if (value) {

        d->applyFullScreenStyleSheet();

    } else {

        d->applyNormalStyleSheet();

    }

    updateContent();

}

void SaveBar::updateContent()

{

    QList<KUrl> lst = DocumentFactory::instance()->modifiedDocumentList();

    if (d->mFullScreenMode) {

        d->mTopRowWidget->hide();

    } else {

        d->mTopRowWidget->show();

        d->updateTopRowWidget(lst);

    }

    d->updateTooManyChangesFrame(lst);

    d->updateWidgetSizes();

    if (lst.isEmpty() || (d->mFullScreenMode && !d->mTooManyChangesFrame->isVisibleTo(d->mSaveBarWidget))) {

        slideOut();

    } else {

        slideIn();

    }

}

void SaveBar::triggerAction(const QString& action)

{

    QList<KUrl> lst = DocumentFactory::instance()->modifiedDocumentList();

    if (action == "first") {

        goToUrl(lst[0]);

    } else if (action == "previous") {

        int pos = lst.indexOf(d->mCurrentUrl);

        --pos;

        Q_ASSERT(pos >= 0);

        goToUrl(lst[pos]);

    } else if (action == "next") {

        int pos = lst.indexOf(d->mCurrentUrl);

        ++pos;

        Q_ASSERT(pos < lst.size());

        goToUrl(lst[pos]);

    } else {

        kWarning() << "Unknown action: " << action ;

    }

}

void SaveBar::setCurrentUrl(const KUrl& url)

{

    d->mCurrentUrl = url;

    updateContent();

}

} // namespace