/****************************************************************************

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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

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** Contact: Nokia Corporation (qt-info@nokia.com)

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** This file is part of the Qt Designer of the Qt Toolkit.

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** contained in the Technology Preview License Agreement accompanying

** this package.

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** packaging of this file.  Please review the following information to

** ensure the GNU Lesser General Public License version 2.1 requirements

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** If you have questions regarding the use of this file, please contact

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** $QT_END_LICENSE$

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****************************************************************************/

#include "iconselector_p.h"

#include "qdesigner_utils_p.h"

#include "qtresourcemodel_p.h"

#include "qtresourceview_p.h"

#include "iconloader_p.h"

#include "qdesigner_integration_p.h"

#include "formwindowbase_p.h"

#include <abstractdialoggui_p.h>

#include <qdesigner_integration_p.h>

#include <QtDesigner/QDesignerFormEditorInterface>

#include <QtDesigner/QDesignerResourceBrowserInterface>

#include <QtDesigner/QDesignerLanguageExtension>

#include <QtDesigner/QExtensionManager>

#include <QtGui/QToolButton>

#include <QtCore/QSignalMapper>

#include <QtGui/QComboBox>

#include <QtGui/QAction>

#include <QtGui/QDialogButtonBox>

#include <QtGui/QPushButton>

#include <QtGui/QDialog>

#include <QtGui/QMenu>

#include <QtGui/QApplication>

#include <QtGui/QVBoxLayout>

#include <QtGui/QImageReader>

#include <QtGui/QDialogButtonBox>

#include <QtGui/QVBoxLayout>

#include <QtCore/QDebug>

QT_BEGIN_NAMESPACE

namespace qdesigner_internal {

// -------------------- LanguageResourceDialogPrivate

class LanguageResourceDialogPrivate {

    LanguageResourceDialog *q_ptr;

    Q_DECLARE_PUBLIC(LanguageResourceDialog)

public:

    LanguageResourceDialogPrivate(QDesignerResourceBrowserInterface *rb);

    void init(LanguageResourceDialog *p);

    void setCurrentPath(const QString &filePath);

    QString currentPath() const;

    void slotAccepted();

    void slotPathChanged(const QString &);

private:

    void setOkButtonEnabled(bool v)         { m_dialogButtonBox->button(QDialogButtonBox::Ok)->setEnabled(v); }

    static bool checkPath(const QString &p);

    QDesignerResourceBrowserInterface *m_browser;

    QDialogButtonBox *m_dialogButtonBox;

};

LanguageResourceDialogPrivate::LanguageResourceDialogPrivate(QDesignerResourceBrowserInterface *rb) :

    q_ptr(0),

    m_browser(rb),

    m_dialogButtonBox(new QDialogButtonBox(QDialogButtonBox::Ok | QDialogButtonBox::Cancel))

{

     setOkButtonEnabled(false);

}

void LanguageResourceDialogPrivate::init(LanguageResourceDialog *p)

{

    q_ptr = p;

    QLayout *layout = new QVBoxLayout(p);

    layout->addWidget(m_browser);

    layout->addWidget(m_dialogButtonBox);

    QObject::connect(m_dialogButtonBox, SIGNAL(accepted()), p, SLOT(slotAccepted()));

    QObject::connect(m_dialogButtonBox, SIGNAL(rejected()), p, SLOT(reject()));

    QObject::connect(m_browser, SIGNAL(currentPathChanged(QString)), p, SLOT(slotPathChanged(QString)));

    QObject::connect(m_browser, SIGNAL(pathActivated(QString)), p, SLOT(slotAccepted()));

    p->setModal(true);

    p->setWindowTitle(LanguageResourceDialog::tr("Choose Resource"));

    p->setWindowFlags(p->windowFlags() & ~Qt::WindowContextHelpButtonHint);

    setOkButtonEnabled(false);

}

void LanguageResourceDialogPrivate::setCurrentPath(const QString &filePath)

{

    m_browser->setCurrentPath(filePath);

    setOkButtonEnabled(checkPath(filePath));

}

QString LanguageResourceDialogPrivate::currentPath() const

{

    return m_browser->currentPath();

}

bool LanguageResourceDialogPrivate::checkPath(const QString &p)

{

    return p.isEmpty() ? false : IconSelector::checkPixmap(p, IconSelector::CheckFast);

}

void LanguageResourceDialogPrivate::slotAccepted()

{

    if (checkPath(currentPath()))

        q_ptr->accept();

}

void LanguageResourceDialogPrivate::slotPathChanged(const QString &p)

{

    setOkButtonEnabled(checkPath(p));

}

// ------------ LanguageResourceDialog

LanguageResourceDialog::LanguageResourceDialog(QDesignerResourceBrowserInterface *rb, QWidget *parent) :

    QDialog(parent),

    d_ptr(new LanguageResourceDialogPrivate(rb))

{

    d_ptr->init( this);

}

LanguageResourceDialog::~LanguageResourceDialog()

{

}

void LanguageResourceDialog::setCurrentPath(const QString &filePath)

{

    d_ptr->setCurrentPath(filePath);

}

QString LanguageResourceDialog::currentPath() const

{

    return d_ptr->currentPath();

}

LanguageResourceDialog* LanguageResourceDialog::create(QDesignerFormEditorInterface *core, QWidget *parent)

{

    if (QDesignerLanguageExtension *lang = qt_extension<QDesignerLanguageExtension *>(core->extensionManager(), core))

        if (QDesignerResourceBrowserInterface *rb = lang->createResourceBrowser(0))

            return new LanguageResourceDialog(rb, parent);

    if (QDesignerIntegration *di = qobject_cast<QDesignerIntegration*>(core->integration()))

        if (QDesignerResourceBrowserInterface *rb = di->createResourceBrowser(0))

            return new LanguageResourceDialog(rb, parent);

    return 0;

}

// ------------ IconSelectorPrivate

class IconSelectorPrivate

{

    IconSelector *q_ptr;

    Q_DECLARE_PUBLIC(IconSelector)

public:

    IconSelectorPrivate();

    void slotStateActivated();

    void slotSetActivated();

    void slotSetResourceActivated();

    void slotSetFileActivated();

    void slotResetActivated();

    void slotResetAllActivated();

    void slotUpdate();

    QList<QPair<QPair<QIcon::Mode, QIcon::State>, QString> > m_stateToName; // could be static map

    QMap<QPair<QIcon::Mode, QIcon::State>, int>  m_stateToIndex;

    QMap<int, QPair<QIcon::Mode, QIcon::State> > m_indexToState;

    QIcon m_emptyIcon;

    QComboBox *m_stateComboBox;

    QToolButton *m_iconButton;

    QAction *m_resetAction;

    QAction *m_resetAllAction;

    PropertySheetIconValue m_icon;

    DesignerIconCache *m_iconCache;

    DesignerPixmapCache *m_pixmapCache;

    QtResourceModel *m_resourceModel;

    QDesignerFormEditorInterface *m_core;

};

IconSelectorPrivate::IconSelectorPrivate() :

    q_ptr(0),

    m_stateComboBox(0),

    m_iconButton(0),

    m_resetAction(0),

    m_resetAllAction(0),

    m_iconCache(0),

    m_pixmapCache(0),

    m_resourceModel(0),

    m_core(0)

{

}

void IconSelectorPrivate::slotUpdate()

{

    QIcon icon;

    if (m_iconCache)

        icon = m_iconCache->icon(m_icon);

    QMap<QPair<QIcon::Mode, QIcon::State>, PropertySheetPixmapValue> paths = m_icon.paths();

    QMapIterator<QPair<QIcon::Mode, QIcon::State>, int> itIndex(m_stateToIndex);

    while (itIndex.hasNext()) {

        const QPair<QIcon::Mode, QIcon::State> state = itIndex.next().key();

        const PropertySheetPixmapValue pixmap = paths.value(state);

        const int index = itIndex.value();

        QIcon pixmapIcon = QIcon(icon.pixmap(16, 16, state.first, state.second));

        if (pixmapIcon.isNull())

            pixmapIcon = m_emptyIcon;

        m_stateComboBox->setItemIcon(index, pixmapIcon);

        QFont font = q_ptr->font();

        if (!pixmap.path().isEmpty())

            font.setBold(true);

        m_stateComboBox->setItemData(index, font, Qt::FontRole);

    }

    QPair<QIcon::Mode, QIcon::State> state = m_indexToState.value(m_stateComboBox->currentIndex());

    PropertySheetPixmapValue currentPixmap = paths.value(state);

    m_resetAction->setEnabled(!currentPixmap.path().isEmpty());

    m_resetAllAction->setEnabled(!paths.isEmpty());

    m_stateComboBox->update();

}

void IconSelectorPrivate::slotStateActivated()

{

    slotUpdate();

}

void IconSelectorPrivate::slotSetActivated()

{

    QPair<QIcon::Mode, QIcon::State> state = m_indexToState.value(m_stateComboBox->currentIndex());

    const PropertySheetPixmapValue pixmap = m_icon.pixmap(state.first, state.second);

    // Default to resource

    const PropertySheetPixmapValue::PixmapSource ps = pixmap.path().isEmpty() ? PropertySheetPixmapValue::ResourcePixmap : pixmap.pixmapSource(m_core);

    switch (ps) {

    case PropertySheetPixmapValue::LanguageResourcePixmap:

    case PropertySheetPixmapValue::ResourcePixmap:

        slotSetResourceActivated();

        break;

    case PropertySheetPixmapValue::FilePixmap:

        slotSetFileActivated();

        break;

    }

}

// Choose a pixmap from resource; use language-dependent resource browser if present

QString IconSelector::choosePixmapResource(QDesignerFormEditorInterface *core, QtResourceModel *resourceModel, const QString &oldPath, QWidget *parent)

{

    Q_UNUSED(resourceModel)

    QString rc;

    if (LanguageResourceDialog* ldlg = LanguageResourceDialog::create(core, parent)) {

        ldlg->setCurrentPath(oldPath);

        if (ldlg->exec() == QDialog::Accepted)

            rc = ldlg->currentPath();

        delete ldlg;

    } else {

        QtResourceViewDialog dlg(core, parent);

        QDesignerIntegration *designerIntegration = qobject_cast<QDesignerIntegration *>(core->integration());

        if (designerIntegration)

            dlg.setResourceEditingEnabled(designerIntegration->isResourceEditingEnabled());

        dlg.selectResource(oldPath);

        if (dlg.exec() == QDialog::Accepted)

            rc = dlg.selectedResource();

    }

    return rc;

}

void IconSelectorPrivate::slotSetResourceActivated()

{

    const QPair<QIcon::Mode, QIcon::State> state = m_indexToState.value(m_stateComboBox->currentIndex());

    PropertySheetPixmapValue pixmap = m_icon.pixmap(state.first, state.second);

    const QString oldPath = pixmap.path();

    const QString newPath = IconSelector::choosePixmapResource(m_core, m_resourceModel, oldPath, q_ptr);

    if (newPath.isEmpty() || newPath == oldPath)

        return;

    const PropertySheetPixmapValue newPixmap = PropertySheetPixmapValue(newPath);

    if (newPixmap != pixmap) {

        m_icon.setPixmap(state.first, state.second, newPixmap);

        slotUpdate();

        emit q_ptr->iconChanged(m_icon);

    }

}

// Helpers for choosing image files: Check for valid image.

bool IconSelector::checkPixmap(const QString &fileName, CheckMode cm, QString *errorMessage)

{

    const QFileInfo fi(fileName);

    if (!fi.exists() || !fi.isFile() || !fi.isReadable()) {

        if (errorMessage)

            *errorMessage = tr("The pixmap file '%1' cannot be read.").arg(fileName);

        return false;

    }

    QImageReader reader(fileName);

    if (!reader.canRead()) {

        if (errorMessage)

            *errorMessage = tr("The file '%1' does not appear to be a valid pixmap file: %2").arg(fileName).arg(reader.errorString());

        return false;

    }

    if (cm == CheckFast)

        return true;

    const QImage image = reader.read();

    if (image.isNull()) {

        if (errorMessage)

            *errorMessage = tr("The file '%1' could not be read: %2").arg(fileName).arg(reader.errorString());

        return false;

    }

    return true;

}

// Helpers for choosing image files: Return an image filter for QFileDialog, courtesy of StyledButton

static QString imageFilter()

{

    QString filter = QApplication::translate("IconSelector", "All Pixmaps (");

    const QList<QByteArray> supportedImageFormats = QImageReader::supportedImageFormats();

    const QString jpeg = QLatin1String("JPEG");

    const int count = supportedImageFormats.count();

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

        if (i)

            filter += QLatin1Char(' ');

        filter += QLatin1String("*.");

        const QString outputFormat = QString::fromUtf8(supportedImageFormats.at(i));

        if (outputFormat != jpeg)

            filter += outputFormat.toLower();

        else

            filter += QLatin1String("jpg *.jpeg");

    }

    filter += QLatin1Char(')');

    return filter;

}

// Helpers for choosing image files: Choose a file

QString IconSelector::choosePixmapFile(const QString &directory, QDesignerDialogGuiInterface *dlgGui,QWidget *parent)

{

    QString errorMessage;

    QString newPath;

    do {

        const QString title = tr("Choose a Pixmap");

        static const  QString filter = imageFilter();

        newPath =  dlgGui->getOpenImageFileName(parent, title, directory, filter);

        if (newPath.isEmpty())

            break;

        if (checkPixmap(newPath, CheckFully, &errorMessage))

            break;

        dlgGui->message(parent, QDesignerDialogGuiInterface::ResourceEditorMessage, QMessageBox::Warning, tr("Pixmap Read Error"), errorMessage);

    } while(true);

    return  newPath;

}

void IconSelectorPrivate::slotSetFileActivated()

{

    QPair<QIcon::Mode, QIcon::State> state = m_indexToState.value(m_stateComboBox->currentIndex());

    PropertySheetPixmapValue pixmap = m_icon.pixmap(state.first, state.second);

    const QString newPath = IconSelector::choosePixmapFile(pixmap.path(), m_core->dialogGui(), q_ptr);

    if (!newPath.isEmpty()) {

        const PropertySheetPixmapValue newPixmap = PropertySheetPixmapValue(newPath);

        if (!(newPixmap == pixmap)) {

            m_icon.setPixmap(state.first, state.second, newPixmap);

            slotUpdate();

            emit q_ptr->iconChanged(m_icon);

        }

    }

}

void IconSelectorPrivate::slotResetActivated()

{

    QPair<QIcon::Mode, QIcon::State> state = m_indexToState.value(m_stateComboBox->currentIndex());

    PropertySheetPixmapValue pixmap = m_icon.pixmap(state.first, state.second);

    const PropertySheetPixmapValue newPixmap;

    if (!(newPixmap == pixmap)) {

        m_icon.setPixmap(state.first, state.second, newPixmap);

        slotUpdate();

        emit q_ptr->iconChanged(m_icon);

    }

}

void IconSelectorPrivate::slotResetAllActivated()

{

    const PropertySheetIconValue newIcon;

    if (!(m_icon == newIcon)) {

        m_icon = newIcon;

        slotUpdate();

        emit q_ptr->iconChanged(m_icon);

    }

}

// ------------- IconSelector

IconSelector::IconSelector(QWidget *parent) :

    QWidget(parent), d_ptr(new IconSelectorPrivate())

{

    d_ptr->q_ptr = this;

    d_ptr->m_stateComboBox = new QComboBox(this);

    QHBoxLayout *l = new QHBoxLayout(this);

    d_ptr->m_iconButton = new QToolButton(this);

    d_ptr->m_iconButton->setText(tr("..."));

    d_ptr->m_iconButton->setPopupMode(QToolButton::MenuButtonPopup);

    l->addWidget(d_ptr->m_stateComboBox);

    l->addWidget(d_ptr->m_iconButton);

    l->setMargin(0);

    d_ptr->m_stateToName << qMakePair(qMakePair(QIcon::Normal,   QIcon::Off), tr("Normal Off")   );

    d_ptr->m_stateToName << qMakePair(qMakePair(QIcon::Normal,   QIcon::On),  tr("Normal On")    );

    d_ptr->m_stateToName << qMakePair(qMakePair(QIcon::Disabled, QIcon::Off), tr("Disabled Off") );

    d_ptr->m_stateToName << qMakePair(qMakePair(QIcon::Disabled, QIcon::On),  tr("Disabled On")  );

    d_ptr->m_stateToName << qMakePair(qMakePair(QIcon::Active,   QIcon::Off), tr("Active Off")   );

    d_ptr->m_stateToName << qMakePair(qMakePair(QIcon::Active,   QIcon::On),  tr("Active On")    );

    d_ptr->m_stateToName << qMakePair(qMakePair(QIcon::Selected, QIcon::Off), tr("Selected Off") );

    d_ptr->m_stateToName << qMakePair(qMakePair(QIcon::Selected, QIcon::On),  tr("Selected On")  );

    QImage img(16, 16, QImage::Format_ARGB32_Premultiplied);

    img.fill(0);

    d_ptr->m_emptyIcon = QIcon(QPixmap::fromImage(img));

    QMenu *setMenu = new QMenu(this);

    QAction *setResourceAction = new QAction(tr("Choose Resource..."), this);

    QAction *setFileAction = new QAction(tr("Choose File..."), this);

    d_ptr->m_resetAction = new QAction(tr("Reset"), this);

    d_ptr->m_resetAllAction = new QAction(tr("Reset All"), this);

    d_ptr->m_resetAction->setEnabled(false);

    d_ptr->m_resetAllAction->setEnabled(false);

    //d_ptr->m_resetAction->setIcon(createIconSet(QString::fromUtf8("resetproperty.png")));

    setMenu->addAction(setResourceAction);

    setMenu->addAction(setFileAction);

    setMenu->addSeparator();

    setMenu->addAction(d_ptr->m_resetAction);

    setMenu->addAction(d_ptr->m_resetAllAction);

    int index = 0;

    QStringList items;

    QListIterator<QPair<QPair<QIcon::Mode, QIcon::State>, QString> > itName(d_ptr->m_stateToName);

    while (itName.hasNext()) {

        QPair<QPair<QIcon::Mode, QIcon::State>, QString> item = itName.next();

        const QPair<QIcon::Mode, QIcon::State> state = item.first;

        const QString name = item.second;

        items.append(name);

        d_ptr->m_stateToIndex[state] = index;

        d_ptr->m_indexToState[index] = state;

        index++;

    }

    d_ptr->m_stateComboBox->addItems(items);

    d_ptr->m_iconButton->setMenu(setMenu);

    connect(d_ptr->m_stateComboBox, SIGNAL(activated(int)), this, SLOT(slotStateActivated()));

    connect(d_ptr->m_iconButton, SIGNAL(clicked()), this, SLOT(slotSetActivated()));

    connect(setResourceAction, SIGNAL(triggered()), this, SLOT(slotSetResourceActivated()));

    connect(setFileAction, SIGNAL(triggered()), this, SLOT(slotSetFileActivated()));

    connect(d_ptr->m_resetAction, SIGNAL(triggered()), this, SLOT(slotResetActivated()));

    connect(d_ptr->m_resetAllAction, SIGNAL(triggered()), this, SLOT(slotResetAllActivated()));

    d_ptr->slotUpdate();

}

IconSelector::~IconSelector()

{

}

void IconSelector::setIcon(const PropertySheetIconValue &icon)

{

    if (d_ptr->m_icon == icon)

        return;

    d_ptr->m_icon = icon;

    d_ptr->slotUpdate();

}

PropertySheetIconValue IconSelector::icon() const

{

    return d_ptr->m_icon;

}

void IconSelector::setFormEditor(QDesignerFormEditorInterface *core)

{

    d_ptr->m_core = core;

    d_ptr->m_resourceModel = core->resourceModel();

    d_ptr->slotUpdate();

}

void IconSelector::setIconCache(DesignerIconCache *iconCache)

{

    d_ptr->m_iconCache = iconCache;

    connect(iconCache, SIGNAL(reloaded()), this, SLOT(slotUpdate()));

    d_ptr->slotUpdate();