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/*
For general Scribus (>=1.3.2) copyright and licensing information please refer
to the COPYING file provided with the program. Following this notice may exist
a copyright and/or license notice that predates the release of Scribus 1.3.2
for which a new license (GPL+exception) is in place.
*/

/* $Id: cwdialog.cpp 5880 2006-07-11 21:07:28Z jghali $ */
#include "cwdialog.h"
#include "cwdialog.moc"

#include <qvariant.h>
#include <qcombobox.h>
#include <qheader.h>
#include <qlistview.h>
#include <qlistbox.h>
#include <qlayout.h>
#include <qtooltip.h>
#include <qwhatsthis.h>
#include <qpushbutton.h>
#include <qspinbox.h>
#include <qpainter.h>
#include <qmenubar.h>
#include <qgroupbox.h>
#include <qslider.h>

#include "prefsmanager.h"
#include "commonstrings.h"
#include "cmykfw.h"
#include "prefsfile.h"
#include "mpalette.h"
#include "colorblind.h"
#include "cwsetcolor.h"
#include "util.h"
#include "colorm.h"


ScribusColorList::ScribusColorList(ScribusDoc* doc, QWidget* parent, const char* name, bool modal, WFlags fl)
        : QDialog(parent, name, modal, fl),
        m_Doc(doc)
{
        if (!name)
                setName("ScribusColorList");
        ScribusColorListLayout = new QGridLayout(this, 1, 1, 11, 6, "ScribusColorListLayout");

        listLayout = new QVBoxLayout(0, 0, 6, "listLayout");

        listView = new ColorListBox(this, "listView");
        listLayout->addWidget(listView);
        listView->updateBox(m_Doc->PageColors, ColorListBox::fancyPixmap);

        btnLayout = new QHBoxLayout(0, 0, 6, "btnLayout");
        btnSpacer = new QSpacerItem(40, 20, QSizePolicy::Expanding, QSizePolicy::Minimum);
        btnLayout->addItem(btnSpacer);

        okButton = new QPushButton(this, "okButton");
        btnLayout->addWidget(okButton);

        cancelButton = new QPushButton(this, "cancelButton");
        btnLayout->addWidget(cancelButton);
        listLayout->addLayout(btnLayout);

        ScribusColorListLayout->addLayout(listLayout, 0, 0);
        languageChange();
        resize(QSize(288, 310).expandedTo(minimumSizeHint()));
        clearWState(WState_Polished);

        connect(listView, SIGNAL(doubleClicked(QListBoxItem *)), this, SLOT(okButton_clicked()));
        connect(okButton, SIGNAL(clicked()), this, SLOT(okButton_clicked()));
        connect(cancelButton, SIGNAL(clicked()), this, SLOT(reject()));
}

void ScribusColorList::languageChange()
{
        setCaption(tr("Document Colors"));
        okButton->setText(CommonStrings::tr_OK);
        cancelButton->setText(CommonStrings::tr_Cancel);
}

void ScribusColorList::okButton_clicked()
{
        ScColor c = m_Doc->PageColors[listView->currentText()];
        selectedColor = c.getRGBColor();
        accept();
}


ColorWheelDialog::ColorWheelDialog(ScribusDoc* doc, QWidget* parent, const char* name, bool modal, WFlags fl)
        : QDialog(parent, name, modal, fl),
        m_Doc(doc)
{
        if (!name)
                setName("ColorWheelDialog");

        QMenuBar *menuBar = new QMenuBar(this, "menuBar");
        QPopupMenu *colorMenu = new QPopupMenu(this);
        colorMenu->insertItem(tr("Cr&eate color..."), this, SLOT(createColor()));
        colorMenu->insertItem(tr("C&olor Components..."), this, SLOT(setColorComponents()));
        colorMenu->insertItem(tr("&Import existing color..."), this, SLOT(importColor()));
        colorMenu->insertSeparator();
        colorMenu->insertItem(tr("&Merge colors"), this, SLOT(addButton_clicked()));
        colorMenu->insertItem(tr("&Replace colors"), this, SLOT(replaceButton_clicked()));
        colorMenu->insertItem(tr("E&xit"), this, SLOT(cancelButton_clicked()));
        menuBar->insertItem(tr("C&olor"), colorMenu);

        formLayout = new QGridLayout(this, 1, 1, 11, 6, "formLayout");
        formLayout->setMenuBar(menuBar);
        mainLayout = new QHBoxLayout(0, 0, 6, "mainLayout");
        wheelLayout = new QVBoxLayout(0, 0, 6, "wheelLayout");

        colorWheel = new ColorWheel(this, "colorWheel");
        colorWheel->setFrameShape(QFrame::Box);
        colorWheel->setMinimumSize(QSize(300, 300));
        colorWheel->setMaximumSize(QSize(300, 300));
        wheelLayout->addWidget(colorWheel);

        typeLabel = new QLabel(this, "typeLabel");
        wheelLayout->addWidget(typeLabel);
        typeCombo = new QComboBox(false, this, "typeCombo");
        wheelLayout->addWidget(typeCombo);

        angleLabel = new QLabel(this, "angleLabel");
        angleLayout = new QHBoxLayout(0, 0, 6, "angleLayout");
        angleLayout->addWidget(angleLabel);
        angleSpin = new QSpinBox(this, "angleSpin");
        angleSpin->setMinValue(0);
        angleSpin->setMaxValue(90);
        angleLayout->addWidget(angleSpin);
        wheelLayout->addLayout(angleLayout);

        spacer1 = new QSpacerItem(20, 40, QSizePolicy::Minimum, QSizePolicy::Expanding);
        wheelLayout->addItem(spacer1);
        mainLayout->addLayout(wheelLayout);

        listLayout = new QVBoxLayout(0, 0, 6, "listLayout");

        defectLayout = new QHBoxLayout(0, 0, 6, "defectLayout");
        defectLabel = new QLabel(this, "defectLabel");
        defectLayout->addWidget(defectLabel);
        defectCombo = new QComboBox(false, this, "defectCombo");
        defectLayout->addWidget(defectCombo);
        listLayout->addLayout(defectLayout);

        previewLabel = new QLabel(this, "previewLabel");
        previewLabel->setFrameShape(QFrame::Box);
        previewLabel->setMinimumSize(QSize(400, 160));
        previewLabel->setMaximumSize(QSize(400, 160));
        listLayout->addWidget(previewLabel);

        colorList = new QListView(this, "colorList");
        listLayout->addWidget(colorList);

        buttonLayout = new QHBoxLayout(0, 0, 6, "buttonLayout");
        addButton = new QPushButton(this, "addButton");
        addButton->setAutoDefault(false);
        buttonLayout->addWidget(addButton);
        replaceButton = new QPushButton(this, "replaceButton");
        replaceButton->setAutoDefault(false);
        buttonLayout->addWidget(replaceButton);
        cancelButton = new QPushButton(this, "cancelButton");
        cancelButton->setAutoDefault(false);
        buttonLayout->addWidget(cancelButton);

        listLayout->addLayout(buttonLayout);
        mainLayout->addLayout(listLayout);
        formLayout->addLayout(mainLayout, 0, 0);

        languageChange();
        resize(QSize(600, 480).expandedTo(minimumSizeHint()));
        clearWState(WState_Polished);

        // setup combobox
        typeCombo->insertItem(colorWheel->getTypeDescription(colorWheel->Monochromatic), colorWheel->Monochromatic);
        typeCombo->insertItem(colorWheel->getTypeDescription(colorWheel->Analogous), colorWheel->Analogous);
        typeCombo->insertItem(colorWheel->getTypeDescription(colorWheel->Complementary), colorWheel->Complementary);
        typeCombo->insertItem(colorWheel->getTypeDescription(colorWheel->Split), colorWheel->Split);
        typeCombo->insertItem(colorWheel->getTypeDescription(colorWheel->Triadic), colorWheel->Triadic);
        typeCombo->insertItem(colorWheel->getTypeDescription(colorWheel->Tetradic), colorWheel->Tetradic);
        // defects
        defectCombo->insertItem(tr("Normal Vision"));
        defectCombo->insertItem(tr("Protanopia (Red)"));
        defectCombo->insertItem(tr("Deuteranopia (Green)"));
        defectCombo->insertItem(tr("Tritanopia (Blue)"));
        defectCombo->insertItem(tr("Full Color Blindness"));

        // preferences
        prefs = PrefsManager::instance()->prefsFile->getPluginContext("colorwheel");
        typeCombo->setCurrentItem(prefs->getInt("cw_type", 0));
        angleSpin->setValue(prefs->getInt("cw_angle", 15));
        colorWheel->angle = angleSpin->value();
        colorWheel->baseAngle = prefs->getInt("cw_baseangle", 0);
        colorWheel->actualColor = QColor(prefs->getInt("cw_r", 0), prefs->getInt("cw_g", 0), prefs->getInt("cw_b", 0));

        // actions
        typeCombo_activated(typeCombo->currentItem());

        // signals and slots connections
        connect(typeCombo, SIGNAL(activated(int)), this, SLOT(typeCombo_activated(int)));
        connect(defectCombo, SIGNAL(activated(int)), this, SLOT(defectCombo_activated(int)));
        connect(colorWheel, SIGNAL(clicked(int, const QPoint&)), this, SLOT(colorWheel_clicked(int, const QPoint&)));
        colorWheel_clicked(0, QPoint(0, 0));
        connect(angleSpin, SIGNAL(valueChanged(int)), this, SLOT(angleSpin_valueChanged(int)));
        connect(addButton, SIGNAL(clicked()), this, SLOT(addButton_clicked()));
        connect(replaceButton, SIGNAL(clicked()), this, SLOT(replaceButton_clicked()));
        connect(cancelButton, SIGNAL(clicked()), this, SLOT(cancelButton_clicked()));
}

/*
 *  Destroys the object and frees any allocated resources
 */

ColorWheelDialog::~ColorWheelDialog()
{
        // no need to delete child widgets, Qt does it all for us
        // preferences
        prefs->set("cw_type", typeCombo->currentItem());
        prefs->set("cw_angle", angleSpin->value());
        prefs->set("cw_baseangle", colorWheel->baseAngle);
        prefs->set("cw_r", colorWheel->actualColor.red());
        prefs->set("cw_g", colorWheel->actualColor.green());
        prefs->set("cw_b", colorWheel->actualColor.blue());
}

/*
 *  Sets the strings of the subwidgets using the current
 *  language.
 */

void ColorWheelDialog::languageChange()
{
        defectLabel->setText(tr("Vision Defect:"));
        setCaption(tr("Color Wheel"));
        colorList->addColumn(tr("Color"));
        colorList->addColumn(tr("Name"));
        colorList->addColumn(tr("C"));
        colorList->addColumn(tr("M"));
        colorList->addColumn(tr("Y"));
        colorList->addColumn(tr("K"));
        colorList->setSorting(1);
        typeLabel->setText(tr("Select Method:"));
        angleLabel->setText(tr("Angle (0 - 90 degrees):"));
        addButton->setText(tr("&Merge Colors"));
        replaceButton->setText(tr("&Replace Colors"));
        cancelButton->setText(CommonStrings::tr_Cancel);
        // tips
        QToolTip::add(addButton, "<qt>" + tr("Merge created colors into the document colors") + "</qt>");
        QToolTip::add(replaceButton, "<qt>" + tr("Replace created colors in the document colors") + "</qt>");
        QToolTip::add(cancelButton, "<qt>" + tr("Leave colors untouched") + "</qt>");
        QToolTip::add(angleSpin, "<qt>" + tr("Difference between the selected value and the counted ones. Refer to documentation for more information.") + "</qt>");
        QToolTip::add(colorWheel, "<qt>" + tr("Click the wheel to get the base color. It is hue in HSV mode.") + "</qt>");
        QToolTip::add(previewLabel, "<qt>" + tr("Sample color scheme") + "</qt>");
        QToolTip::add(typeCombo, "<qt>" + tr("Select one of the methods to create a color scheme. Refer to documentation for more information.") + "</qt>");
        QToolTip::add(colorList, "<qt>" + tr("Colors of your chosen color scheme") + "</qt>");
        QToolTip::add(defectCombo, "<qt>" + tr("Simulate common vision defects here. Select type of the defect.") + "</qt>");
}

void ColorWheelDialog::fillColorList()
{
        colorList->clear();
        for (ColorList::iterator it = colorWheel->colorList.begin(); it != colorWheel->colorList.end(); ++it)
        {
                int c, m, y, k;
                QListViewItem *item = new QListViewItem(colorList);
                QPixmap *pm = getSmallPixmap(it.data().getRGBColor());
                item->setPixmap(0, *pm);
                item->setText(1, it.key());
                it.data().getCMYK(&c, &m, &y, &k);
                item->setText(2, QString("%1").arg(c));
                item->setText(3, QString("%1").arg(m));
                item->setText(4, QString("%1").arg(y));
                item->setText(5, QString("%1").arg(k));
        }
}

void ColorWheelDialog::typeCombo_activated(int index)
{
        colorList->clear();
        if (index == colorWheel->Monochromatic)
        {
                angleSpin->setEnabled(false);
                angleLabel->setEnabled(false);
                colorWheel->makeMonochromatic();
        }
        if (index == colorWheel->Analogous)
        {
                angleSpin->setEnabled(true);
                angleLabel->setEnabled(true);
                colorWheel->makeAnalogous();
        }
        if (index == colorWheel->Complementary)
        {
                angleSpin->setEnabled(false);
                angleLabel->setEnabled(false);
                colorWheel->makeComplementary();
        }
        if (index == colorWheel->Split)
        {
                angleSpin->setEnabled(true);
                angleLabel->setEnabled(true);
                colorWheel->makeSplit();
        }
        if (index == colorWheel->Triadic)
        {
                angleSpin->setEnabled(false);
                angleLabel->setEnabled(false);
                colorWheel->makeTriadic();
        }
        if (index == colorWheel->Tetradic)
        {
                angleSpin->setEnabled(true);
                angleLabel->setEnabled(true);
                colorWheel->makeTetradic();
        }
        fillColorList();
        setPreview();
}

void ColorWheelDialog::colorWheel_clicked(int, const QPoint&)
{
        typeCombo_activated(typeCombo->currentItem());
}

void ColorWheelDialog::angleSpin_valueChanged(int value)
{
        colorWheel->angle = value;
        typeCombo_activated(typeCombo->currentItem());
}

void ColorWheelDialog::addButton_clicked()
{
        QString status("<qt><h2>" + tr("Merging colors") + "</h2><p>");
        bool err = false;
        for (ColorList::iterator it = colorWheel->colorList.begin(); it != colorWheel->colorList.end(); ++it)
        {
                if (m_Doc->PageColors.contains(it.key()))
                {
                        status += "<b>" + tr("Error: ") + "</b>" + tr("Color %1 exists already!").arg(it.key()) + "<br/>";
                        err = true;
                }
                else
                {
                        status += tr("Color %1 appended.").arg(it.key()) + "<br/>";
                        m_Doc->PageColors[it.key()] = it.data();
                }
        }
        status += "<p>" + tr("Now opening the color manager.") + "</p></qt>";
        if (err)
        {
                QMessageBox::information(this, tr("Color Merging"), status);
                m_Doc->scMW()->slotEditColors();
                return;
        }
        m_Doc->scMW()->propertiesPalette->updateColorList();
        m_Doc->scMW()->propertiesPalette->updateCList();
        accept();
}

void ColorWheelDialog::replaceButton_clicked()
{
        for (ColorList::iterator it = colorWheel->colorList.begin(); it != colorWheel->colorList.end(); ++it)
        {
                m_Doc->PageColors[it.key()] = it.data();
        }
        m_Doc->scMW()->propertiesPalette->updateColorList();
        m_Doc->scMW()->propertiesPalette->updateCList();
        accept();
}

void ColorWheelDialog::cancelButton_clicked()
{
        reject();
}

void ColorWheelDialog::defectCombo_activated(int /*index*/)
{
        setPreview();
}

void ColorWheelDialog::setPreview()
{
        int x = previewLabel->width();
        int y = previewLabel->height();
        QValueList<ScColor> cols = colorWheel->colorList.values();
        int xstep = x / cols.count();
        QPixmap pm = QPixmap(x, y);
        QPainter *p = new QPainter(&pm);
        QFontMetrics fm = p->fontMetrics();

        pm.fill(Qt::white);
        p->setPen(Qt::white);
        p->drawRect(0, 0, x, y);
        for (uint i = 0; i < cols.count(); ++i)
        {
                QColor c = computeDefect(cols[i].getRGBColor());
                p->setPen(c);
                p->setBrush(c);
                p->drawRect(i * xstep, 0, xstep, y);
        }
        p->setPen(Qt::black);
        p->setBrush(Qt::black);
        p->drawText(15, 5 + fm.height(), "Lorem ipsum dolor sit amet");
        p->setPen(Qt::white);
        p->setBrush(Qt::white);
        p->drawText(125, y - 5 - fm.height(), "Lorem ipsum dolor sit amet");
        p->end();
        delete(p);
        previewLabel->clear();
        previewLabel->setPixmap(pm);
}

QColor ColorWheelDialog::computeDefect(QColor c)
{
        if (defectCombo->currentItem() == VisionDefectColor::normalVision)
                return c;
        VisionDefectColor *defect = new VisionDefectColor(c);
        defect->deficiency = defectCombo->currentItem();
        defect->convertDefect();
        QColor nc = defect->getColor();
        delete defect;
        return nc;
}

void ColorWheelDialog::createColor()
{
        ScColor beginColor;
        /* these 2 variables are defined for CMYKChoose constructor.
        No other need to use them. */

        ColorList tmpcl;
        QStringList tmpsl;

        beginColor.fromQColor(colorWheel->actualColor);
        CMYKChoose* dia = new CMYKChoose(this, m_Doc, beginColor, tr("New Color"), &tmpcl, tmpsl);
        if (dia->exec())
                userColorInput(dia->Farbe.getRGBColor());
        delete dia;
}

void ColorWheelDialog::setColorComponents()
{
        CwSetColor *dia = new CwSetColor(colorWheel->actualColor, this);
        if (dia->exec())
                userColorInput(dia->newColor);
        delete dia;
}

void ColorWheelDialog::importColor()
{
        ScribusColorList *dia = new ScribusColorList(m_Doc, this, "dia", true, 0);
        if (dia->exec())
                userColorInput(dia->selectedColor);
        delete dia;
}

void ColorWheelDialog::userColorInput(QColor c)
{
        if (colorWheel->recomputeColor(c))
                typeCombo_activated(typeCombo->currentItem());
        else
                QMessageBox::information(this, caption(),
                                "<qt>" + tr("Unable to find the requested color. "
                                                        "You have probably selected black, gray or white. "
                                                        "There is no way to process this color.") + "</qt>");
}