/**
 * @file: style_edit.cpp 
 * Widgets for style manipulation
 */
/* 
 * GUI for ShowGraph tool.
 * Copyright (c) 2009, Boris Shurygin
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
 * 
 * 3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
#include "gview_impl.h"

ColorButton::ColorButton( QWidget *parent):
    QAbstractButton( parent)
{

}

void ColorButton::paintEvent( QPaintEvent *event)
{
    QPainter painter( this);
    painter.setPen( palette().windowText().color());
    painter.setBrush( color);
    painter.drawRect( rect());
}

QSize ColorButton::sizeHint() const
{
    return QSize( 20,20);
}

StyleEdit::StyleEdit( QWidget *parent, bool show_additional)
: name_label(NULL),
  line_color_label(NULL),
  line_style_label(NULL),
  line_width_label(NULL),
  fill_color_label(NULL),
  shape_label(NULL),
  name_combo(NULL),
  fill_check(NULL),
  shape_combo(NULL),
  line_color_button(NULL),
  line_style_combo(NULL),
  line_width_spin(NULL),
  fill_color_button(NULL),
  ok(NULL),
  cancel(NULL)
{
    QColor color;
    if ( show_additional)
    {        
        shape_combo = new QComboBox( this);
        shape_combo->addItem(tr("Box"), NODE_SHAPE_BOX);
        shape_combo->addItem(tr("Rounded box"), NODE_SHAPE_ROUNDED_BOX);
        shape_combo->addItem(tr("Ellipse"), NODE_SHAPE_ELLIPSE);
        shape_combo->addItem(tr("Circle"), NODE_SHAPE_CIRCLE);
        shape_combo->addItem(tr("Diamond"), NODE_SHAPE_DIAMOND);

        shape_label = new QLabel( "Shape:", this);
        shape_label->setBuddy( shape_combo);
    } else
    {
        shape_combo = NULL;
    }

    color = QColor(palette().windowText().color());
    line_color_button = new ColorButton( this);
    line_color_button->setColor( color);
    
    line_color_label = new QLabel( "Line color:", this);
    line_color_label->setBuddy( line_color_button);

    line_style_combo = new QComboBox( this);
#if QT_VERSION >= QT_VERSION_CHECK(5, 0, 0)
    line_style_combo->addItem(tr("Solid"), QPen(Qt::SolidLine));
    line_style_combo->addItem(tr("Dash"), QPen(Qt::DashLine));
    line_style_combo->addItem(tr("Dot"), QPen(Qt::DotLine));
    line_style_combo->addItem(tr("Dash Dot"), QPen(Qt::DashDotLine));
    line_style_combo->addItem(tr("Dash Dot Dot"), QPen(Qt::DashDotDotLine));
    line_style_combo->addItem(tr("None"), QPen(Qt::NoPen));
#else
    line_style_combo->addItem(tr("Solid"), Qt::SolidLine);
    line_style_combo->addItem(tr("Dash"), Qt::DashLine);
    line_style_combo->addItem(tr("Dot"), Qt::DotLine);
    line_style_combo->addItem(tr("Dash Dot"), Qt::DashDotLine);
    line_style_combo->addItem(tr("Dash Dot Dot"), Qt::DashDotDotLine);
    line_style_combo->addItem(tr("None"), Qt::NoPen);
#endif

    line_style_label = new QLabel( "Line style:", this);
    line_style_label->setBuddy( line_style_combo);
    
    line_width_spin = new QDoubleSpinBox( this);
    line_width_spin->setMaximum( 12);
    
    line_width_label = new QLabel( "Line width:", this);
    line_width_label->setBuddy( line_width_spin);

    if ( show_additional)
    {
        color = QColor(palette().base().color());
        fill_check = new QCheckBox( "Fill", this);
        fill_color_button = new ColorButton( this);
        fill_color_button->setColor( color);
        
        fill_color_label = new QLabel( "Fill color:", this);
        fill_color_label->setBuddy( fill_color_button);
    } else
    {
        fill_color_button = NULL;
        fill_color_label = NULL;
        fill_check = NULL;
    }


    ok = new QPushButton( "&OK", this);
    cancel = new QPushButton( "&Cancel", this);

    QGridLayout *mainLayout = new QGridLayout;
    //mainLayout->setColumnStretch(1, 3);
    
    //Row 0 name
    if ( show_additional)
    {
        mainLayout->addWidget( shape_label, 0, 0, Qt::AlignRight);
        mainLayout->addWidget( shape_combo, 0, 1);
    }
    //Row 1 line color
    mainLayout->addWidget( line_color_label, 1, 0, Qt::AlignRight);
    mainLayout->addWidget( line_color_button, 1, 1);
    //Row 2 line style
    mainLayout->addWidget( line_style_label, 2, 0, Qt::AlignRight);
    mainLayout->addWidget( line_style_combo, 2, 1);
     //Row 3 line width
    mainLayout->addWidget( line_width_label, 3, 0, Qt::AlignRight);
    mainLayout->addWidget( line_width_spin, 3, 1);
    //Row 4 fill color
    if ( show_additional)
    {
        mainLayout->addWidget( fill_check, 4, 0, 1, 2);
        mainLayout->addWidget( fill_color_label, 5, 0, Qt::AlignRight);
        mainLayout->addWidget( fill_color_button, 5, 1);
    }
    // Row 5 ok & cancel
    mainLayout->addWidget( ok, 6, 0);
    mainLayout->addWidget( cancel, 6, 1);
    
    setLayout( mainLayout);

    if ( show_additional)
    {
        connect( shape_combo, SIGNAL( currentIndexChanged( int)), this, SLOT( changeShape()) );
        connect( fill_color_button, SIGNAL( clicked()), this, SLOT( selectFillColor()) );
        connect( fill_check, SIGNAL( clicked()), this, SLOT( changeFillStyle()) );
    }
    connect( line_color_button, SIGNAL( clicked()), this, SLOT( selectLineColor()) );
    connect( line_style_combo, SIGNAL( currentIndexChanged( int)), this, SLOT( changeLineStyle()) );
    connect( line_width_spin, SIGNAL( valueChanged( double)), this, SLOT( changeLineWidth( double)) );
    

    connect( ok, SIGNAL( clicked()), this, SLOT( accept()));
    connect( cancel, SIGNAL( clicked()), this, SLOT( reject()));

    setWindowTitle( "Edit style");
    setWindowFlags( windowFlags() | Qt::MSWindowsFixedSizeDialogHint);
}

/** Change name of the current style */
void StyleEdit::changeStyleName()
{

}

/** Invoke color selection for line */
void StyleEdit::selectLineColor()
{
    QColor color = QColorDialog::getColor();
    line_color_button->setColor( color);
    gstyle->setPenColor( color);
    gstyle->setState();
    emit styleChanged( gstyle);
}

/** Change line style */
void StyleEdit::changeLineStyle()
{
    gstyle->setPenStyle((Qt::PenStyle)line_style_combo->itemData( line_style_combo->currentIndex()).toInt());
    gstyle->setState();
    emit styleChanged( gstyle);
}

/** Change line style */
void StyleEdit::changeShape()
{
    emit styleChanged( gstyle);
    gstyle->setShape((NodeShape)shape_combo->itemData( shape_combo->currentIndex()).toInt());
    gstyle->setState();
    emit styleChanged( gstyle);
}

/** Change line width */
void StyleEdit::changeLineWidth( double width)
{
    gstyle->setPenWidth(line_width_spin->value());
    gstyle->setState();
    emit styleChanged( gstyle);
}
/** Set fill style */
void StyleEdit::changeFillStyle()
{
    if ( !fill_check->isChecked())
    { 
        QBrush br = gstyle->brush();
        br.setStyle( Qt::NoBrush);
        gstyle->setBrush( br);
    } else
    {
        QBrush br = gstyle->brush();
        br.setStyle( Qt::SolidPattern);
        gstyle->setBrush( br);
        gstyle->setState();
    }
    emit styleChanged( gstyle);
}
/** Invoke color selection for fill */
void StyleEdit::selectFillColor()
{
    QColor color = QColorDialog::getColor();
    QBrush brush( color);
    fill_color_button->setColor( color);
    gstyle->setBrush( brush);
    gstyle->setState();
    fill_check->setChecked( true);
    emit styleChanged( gstyle);
}

/** Set style */
void StyleEdit::setGStyle( GStyle *st)
{
    gstyle = st;
    QColor color( st->pen().color());
    line_color_button->setColor( color);
    if ( isNotNullP( shape_combo))
    {
        color =  QColor( st->brush().color());
        shape_combo->setCurrentIndex( shape_combo->findData( gstyle->shape()));
        fill_color_button->setColor( color);
        fill_check->setChecked( st->brush().style() != Qt::NoBrush);
        if ( st->brush().style() == Qt::NoBrush)
        {
            QBrush br = gstyle->brush();
            color = QColor( "White");
            br.setColor( color);
            gstyle->setBrush( br);
            fill_color_button->setColor( color);
        }
    }
#if QT_VERSION >= QT_VERSION_CHECK(5, 0, 0)
    line_style_combo->setCurrentIndex( line_style_combo->findData( QPen(gstyle->pen().style())));
#else
    line_style_combo->setCurrentIndex( line_style_combo->findData( gstyle->pen().style()));
#endif
    line_width_spin->setValue( gstyle->pen().widthF());
}