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#include "instancedelegate.h"
#include <QPainter>
#include <QTextOption>
#include <QTextLayout>
#include <QApplication>
#include <QtCore/qmath.h>
// Origin: Qt
static void viewItemTextLayout ( QTextLayout &textLayout, int lineWidth, qreal &height, qreal &widthUsed )
{
height = 0;
widthUsed = 0;
textLayout.beginLayout();
while ( true )
{
QTextLine line = textLayout.createLine();
if ( !line.isValid() )
break;
line.setLineWidth ( lineWidth );
line.setPosition ( QPointF ( 0, height ) );
height += line.height();
widthUsed = qMax ( widthUsed, line.naturalTextWidth() );
}
textLayout.endLayout();
}
#define QFIXED_MAX (INT_MAX/256)
ListViewDelegate::ListViewDelegate ( QObject* parent ) : QStyledItemDelegate ( parent )
{
}
void drawSelectionRect(QPainter *painter, const QStyleOptionViewItemV4 &option, const QRect &rect)
{
if (!(option.state & QStyle::State_Selected))
return;
painter->fillRect ( rect, option.palette.brush ( QPalette::Highlight ) );
}
void drawFocusRect(QPainter *painter, const QStyleOptionViewItemV4 &option, const QRect &rect)
{
if (!(option.state & QStyle::State_HasFocus))
return;
QStyleOptionFocusRect opt;
opt.direction = option.direction;
opt.fontMetrics = option.fontMetrics;
opt.palette = option.palette;
opt.rect = rect;
//opt.state = option.state | QStyle::State_KeyboardFocusChange | QStyle::State_Item;
auto col = option.state & QStyle::State_Selected ? QPalette::Highlight : QPalette::Base;
opt.backgroundColor = option.palette.color(col);
// Apparently some widget styles expect this hint to not be set
painter->setRenderHint(QPainter::Antialiasing, false);
QStyle *style = option.widget ? option.widget->style() : QApplication::style();
style->drawPrimitive(QStyle::PE_FrameFocusRect, &opt, painter, option.widget);
painter->setRenderHint(QPainter::Antialiasing);
}
static QSize viewItemTextSize ( const QStyleOptionViewItemV4 *option )
{
QStyle *style = option->widget ? option->widget->style() : QApplication::style();
QTextOption textOption;
textOption.setWrapMode ( QTextOption::WrapAtWordBoundaryOrAnywhere );
QTextLayout textLayout;
textLayout.setTextOption ( textOption );
textLayout.setFont ( option->font );
textLayout.setText ( option->text );
const int textMargin = style->pixelMetric ( QStyle::PM_FocusFrameHMargin, option, option->widget ) + 1;
QRect bounds ( 0,0,100 - 2*textMargin,600 );
qreal height = 0, widthUsed = 0;
viewItemTextLayout ( textLayout, bounds.width(), height, widthUsed );
const QSize size ( qCeil ( widthUsed ), qCeil ( height ) );
return QSize ( size.width() + 2 * textMargin, size.height() );
}
void ListViewDelegate::paint ( QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index ) const
{
QStyleOptionViewItemV4 opt = option;
initStyleOption ( &opt, index );
painter->save();
painter->setClipRect ( opt.rect );
opt.features |= QStyleOptionViewItem::WrapText;
opt.text = index.data().toString();
opt.textElideMode = Qt::ElideRight;
opt.displayAlignment = Qt::AlignTop | Qt::AlignHCenter;
QStyle *style = opt.widget ? opt.widget->style() : QApplication::style();
//const int iconSize = style->pixelMetric(QStyle::PM_IconViewIconSize);
const int iconSize = 48;
QRect iconbox = opt.rect;
const int textMargin = style->pixelMetric ( QStyle::PM_FocusFrameHMargin, 0, opt.widget ) + 1;
QRect textRect = opt.rect;
QRect textHighlightRect = textRect;
// clip the decoration on top, remove width padding
textRect.adjust ( textMargin,iconSize + textMargin + 5,-textMargin,0 );
textHighlightRect.adjust ( 0,iconSize + 5,0,0 );
// draw background
{
QSize textSize = viewItemTextSize ( &opt );
QPalette::ColorGroup cg;
QStyleOptionViewItemV4 opt2(opt);
if((opt.widget && opt.widget->isEnabled()) || (opt.state & QStyle::State_Enabled))
{
if(! ( opt.state & QStyle::State_Active ))
cg = QPalette::Inactive;
else
cg = QPalette::Normal;
}
else
{
cg = QPalette::Disabled;
}
opt2.palette.setCurrentColorGroup(cg);
// fill in background, if any
if ( opt.backgroundBrush.style() != Qt::NoBrush )
{
QPointF oldBO = painter->brushOrigin();
painter->setBrushOrigin ( opt.rect.topLeft() );
painter->fillRect ( opt.rect, opt.backgroundBrush );
painter->setBrushOrigin ( oldBO );
}
if ( opt.showDecorationSelected )
{
drawSelectionRect(painter,opt2, opt.rect);
drawFocusRect(painter,opt2, opt.rect);
//painter->fillRect ( opt.rect, opt.palette.brush ( cg, QPalette::Highlight ) );
}
else
{
//if ( opt.state & QStyle::State_Selected )
{
//QRect textRect = subElementRect ( QStyle::SE_ItemViewItemText, opt, opt.widget );
//painter->fillRect ( textHighlightRect, opt.palette.brush ( cg, QPalette::Highlight ) );
drawSelectionRect(painter,opt2, textHighlightRect);
drawFocusRect(painter,opt2, textHighlightRect);
}
}
}
// draw the icon
{
QIcon::Mode mode = QIcon::Normal;
if ( ! ( opt.state & QStyle::State_Enabled ) )
mode = QIcon::Disabled;
else if ( opt.state & QStyle::State_Selected )
mode = QIcon::Selected;
QIcon::State state = opt.state & QStyle::State_Open ? QIcon::On : QIcon::Off;
iconbox.setHeight ( iconSize );
opt.icon.paint ( painter, iconbox, Qt::AlignCenter, mode, state );
}
// set the text colors
QPalette::ColorGroup cg = opt.state & QStyle::State_Enabled ? QPalette::Normal : QPalette::Disabled;
if ( cg == QPalette::Normal && ! ( opt.state & QStyle::State_Active ) )
cg = QPalette::Inactive;
if ( opt.state & QStyle::State_Selected )
{
painter->setPen ( opt.palette.color ( cg, QPalette::HighlightedText ) );
}
else
{
painter->setPen ( opt.palette.color ( cg, QPalette::Text ) );
}
// draw the text
QTextOption textOption;
textOption.setWrapMode ( QTextOption::WrapAtWordBoundaryOrAnywhere );
textOption.setTextDirection ( opt.direction );
textOption.setAlignment ( QStyle::visualAlignment ( opt.direction, opt.displayAlignment ) );
QTextLayout textLayout;
textLayout.setTextOption ( textOption );
textLayout.setFont ( opt.font );
textLayout.setText ( opt.text );
qreal width, height;
viewItemTextLayout ( textLayout, iconbox.width(), height, width );
const int lineCount = textLayout.lineCount();
const QRect layoutRect = QStyle::alignedRect ( opt.direction, opt.displayAlignment, QSize ( iconbox.width(), int ( height ) ), textRect );
const QPointF position = layoutRect.topLeft();
for ( int i = 0; i < lineCount; ++i )
{
const QTextLine line = textLayout.lineAt ( i );
line.draw ( painter, position );
}
painter->restore();
}
QSize ListViewDelegate::sizeHint ( const QStyleOptionViewItem & option, const QModelIndex & index ) const
{
QStyleOptionViewItemV4 opt = option;
initStyleOption ( &opt, index );
opt.features |= QStyleOptionViewItem::WrapText;
opt.text = index.data().toString();
opt.textElideMode = Qt::ElideRight;
opt.displayAlignment = Qt::AlignTop | Qt::AlignHCenter;
QStyle *style = opt.widget ? opt.widget->style() : QApplication::style();
const int textMargin = style->pixelMetric ( QStyle::PM_FocusFrameHMargin, &option, opt.widget ) + 1;
int height = 48 + textMargin * 2 + 5; // TODO: turn constants into variables
QSize szz = viewItemTextSize ( &opt );
height += szz.height();
// FIXME: maybe the icon items could scale and keep proportions?
QSize sz ( 100,height );
return sz;
}
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