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#include "completeritemdelegate.h"
#include "completermodel.h"
#include "common/unused.h"
#include <QPainter>
#include <QIcon>
#include <QApplication>
#include <QVariant>
#include <QDebug>
/*
* Some of the code in this file comes from Qt5.1, from qcommonstyle.cpp.
* It uses similar (but different) routines as Qt does for drawing CE_ItemViewItem.
*/
CompleterItemDelegate::CompleterItemDelegate(QObject *parent) :
QStyledItemDelegate(parent)
{
}
void CompleterItemDelegate::paint(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index) const
{
QStyleOptionViewItem opt = option;
initStyleOption(&opt, index);
paintBackground(painter, opt, index);
paintIcon(painter, opt, index);
paintText(painter, opt, index);
}
QSize CompleterItemDelegate::sizeHint(const QStyleOptionViewItem& option, const QModelIndex& index) const
{
QSize size = QStyledItemDelegate::sizeHint(option, index);
if (size.height() < 18)
size.setHeight(18); // at least 1 pixel larger than icons
return size;
}
void CompleterItemDelegate::paintBackground(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index) const
{
UNUSED(index);
painter->save();
QPalette::ColorGroup cg = (option.state & QStyle::State_Enabled) ? QPalette::Normal : QPalette::Disabled;
if (cg == QPalette::Normal && !(option.state & QStyle::State_Active))
cg = QPalette::Inactive;
QColor bg = option.palette.color(cg, QPalette::Base);
if (option.state & QStyle::State_Selected)
bg = option.palette.color(cg, QPalette::Highlight);
painter->setPen(Qt::NoPen);
painter->setBrush(bg);
painter->drawRect(option.rect);
painter->restore();
}
void CompleterItemDelegate::paintIcon(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index) const
{
QIcon icon = index.data(Qt::DecorationRole).value<QIcon>();
QSize iconSize = icon.availableSizes()[0];
QIcon::Mode mode = QIcon::Normal;
if (!(option.state & QStyle::State_Enabled))
mode = QIcon::Disabled;
else if (option.state & QStyle::State_Selected)
mode = QIcon::Selected;
QRect iconRect = option.rect;
iconRect.setSize(iconSize + QSize(spacer*2, spacer*2));
iconRect.setTopLeft(iconRect.topLeft() + QPoint(spacer, spacer));
QIcon::State state = (option.state & QStyle::State_Open) ? QIcon::On : QIcon::Off;
icon.paint(painter, iconRect, option.decorationAlignment, mode, state);
}
void CompleterItemDelegate::paintText(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index) const
{
painter->save();
// Colors
QPalette::ColorGroup cg = (option.state & QStyle::State_Enabled) ? QPalette::Normal : QPalette::Disabled;
if (cg == QPalette::Normal && !(option.state & QStyle::State_Active))
cg = QPalette::Inactive;
QColor prefixColor = option.palette.color(cg, QPalette::Dark);
QColor valueColor = option.palette.color(cg, QPalette::Text);
QColor labelColor = option.palette.color(cg, QPalette::Link);
if (option.state & QStyle::State_Selected)
{
prefixColor = option.palette.color(cg, QPalette::HighlightedText);
valueColor = option.palette.color(cg, QPalette::HighlightedText);
labelColor = option.palette.color(cg, QPalette::HighlightedText);
}
// Using ascent() to measure usual height of the font, excluding anything below baseline.
int x = option.rect.x() + 20;
int y = option.rect.y() + option.rect.height() / 2 + option.fontMetrics.ascent() / 2 - spacer;
painter->setFont(option.font);
// Getting all data to be painted
QString prefixValue = index.data(CompleterModel::PREFIX).toString();
QString value = index.data(CompleterModel::VALUE).toString();
QString label = index.data(CompleterModel::LABEL).toString();
// Drawing prefix, value and label
painter->setPen(prefixColor);
paintPrefix(painter, option.fontMetrics, x, y, prefixValue);
painter->setPen(valueColor);
paintValue(painter, option.fontMetrics, x, y, value);
painter->setPen(labelColor);
paintLabel(painter, x, y, label, value.isEmpty());
painter->restore();
}
void CompleterItemDelegate::paintPrefix(QPainter* painter, const QFontMetrics& metrics, int& x, int y, const QString& text) const
{
if (text.isNull())
return;
QString value = text + ".";
painter->drawText(QPoint(x, y), value);
x += metrics.horizontalAdvance(value);
}
void CompleterItemDelegate::paintValue(QPainter* painter, const QFontMetrics& metrics, int& x, int y, const QString& text) const
{
painter->drawText(QPoint(x, y), text);
x += metrics.horizontalAdvance(text);
}
void CompleterItemDelegate::paintLabel(QPainter* painter, int& x, int y, const QString& text, bool emptyValue) const
{
if (text.isNull())
return;
if (!emptyValue) //if the value was empty, there's no reason to move te label right
x += 10;
QString label = "(" + text + ")";
painter->drawText(QPoint(x, y), label);
}
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