File indexing completed on 2024-04-28 03:59:02

 /*
     This file is part of the KDE libraries
     SPDX-FileCopyrightText: 1997 Martin Jones <mjones@kde.org>
     SPDX-FileCopyrightText: 2007 Pino Toscano <pino@kde.org>
     SPDX-FileCopyrightText: 2007 David Jarvie <djarvie@kde.org>
 
     SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
 #include "kcolorcombo.h"
 
 #include <QAbstractItemDelegate>
 #include <QApplication>
 #include <QColorDialog>
 #include <QStylePainter>
 
 class KColorComboDelegate : public QAbstractItemDelegate
 {
     Q_OBJECT
 public:
     enum ItemRoles {
         ColorRole = Qt::UserRole + 1,
     };
 
     enum LayoutMetrics {
         FrameMargin = 3,
     };
 
     KColorComboDelegate(QObject *parent = nullptr);
     ~KColorComboDelegate() override;
 
     void paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const override;
     QSize sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const override;
 };
 
 static QBrush k_colorcombodelegate_brush(const QModelIndex &index, int role)
 {
     QBrush brush;
     QVariant v = index.data(role);
     if (v.userType() == QMetaType::QBrush) {
         brush = v.value<QBrush>();
     } else if (v.userType() == QMetaType::QColor) {
         brush = QBrush(v.value<QColor>());
     }
     return brush;
 }
 
 KColorComboDelegate::KColorComboDelegate(QObject *parent)
     : QAbstractItemDelegate(parent)
 {
 }
 
 KColorComboDelegate::~KColorComboDelegate()
 {
 }
 
 void KColorComboDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
 {
     // background
     QColor innercolor(Qt::white);
     bool isSelected = (option.state & QStyle::State_Selected);
     bool paletteBrush = (k_colorcombodelegate_brush(index, Qt::BackgroundRole).style() == Qt::NoBrush);
     if (isSelected) {
         innercolor = option.palette.color(QPalette::Highlight);
     } else {
         innercolor = option.palette.color(QPalette::Base);
     }
     // highlight selected item
     QStyleOptionViewItem opt(option);
     opt.showDecorationSelected = true;
     QStyle *style = opt.widget ? opt.widget->style() : QApplication::style();
     style->drawPrimitive(QStyle::PE_PanelItemViewItem, &opt, painter, opt.widget);
     QRect innerrect = option.rect.adjusted(FrameMargin, FrameMargin, -FrameMargin, -FrameMargin);
     // inner color
     QVariant cv = index.data(ColorRole);
     if (cv.userType() == QMetaType::QColor) {
         QColor tmpcolor = cv.value<QColor>();
         if (tmpcolor.isValid()) {
             innercolor = tmpcolor;
             paletteBrush = false;
             painter->setPen(Qt::transparent);
             painter->setBrush(innercolor);
             QPainter::RenderHints tmpHint = painter->renderHints();
             painter->setRenderHint(QPainter::Antialiasing);
             painter->drawRoundedRect(innerrect, 2, 2);
             painter->setRenderHints(tmpHint);
             painter->setBrush(Qt::NoBrush);
         }
     }
     // text
     QVariant tv = index.data(Qt::DisplayRole);
     if (tv.userType() == QMetaType::QString) {
         QString text = tv.toString();
         QColor textColor;
         if (paletteBrush) {
             if (isSelected) {
                 textColor = option.palette.color(QPalette::HighlightedText);
             } else {
                 textColor = option.palette.color(QPalette::Text);
             }
         } else {
             int unused;
             int v;
             innercolor.getHsv(&unused, &unused, &v);
             if (v > 128) {
                 textColor = Qt::black;
             } else {
                 textColor = Qt::white;
             }
         }
         painter->setPen(textColor);
         painter->drawText(innerrect.adjusted(1, 1, -1, -1), text);
     }
 }
 
 QSize KColorComboDelegate::sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const
 {
     Q_UNUSED(index)
 
     // the width does not matter, as the view will always use the maximum width available
     return QSize(100, option.fontMetrics.height() + 2 * FrameMargin);
 }
 
 static const uchar standardPalette[][4] = {
     {255, 255, 255}, // white
     {192, 192, 192}, // light gray
     {160, 160, 160}, // gray
     {128, 128, 128}, // dark gray
     {0, 0, 0}, // black
 
     {255, 128, 128}, // light red
     {255, 192, 128}, // light orange
     {255, 255, 128}, // light yellow
     {128, 255, 128}, // light green
     {128, 255, 255}, // cyan blue
     {128, 128, 255}, // light blue
     {255, 128, 255}, // light violet
     {255, 0, 0}, // red
     {255, 128, 0}, // orange
     {255, 255, 0}, // yellow
     {0, 255, 0}, // green
     {0, 255, 255}, // light blue
     {0, 0, 255}, // blue
     {255, 0, 255}, // violet
     {128, 0, 0}, // dark red
     {128, 64, 0}, // dark orange
     {128, 128, 0}, // dark yellow
     {0, 128, 0}, // dark green
     {0, 128, 128}, // dark light blue
     {0, 0, 128}, // dark blue
     {128, 0, 128} // dark violet
 };
 
 #define STANDARD_PALETTE_SIZE (int(sizeof(standardPalette) / sizeof(*standardPalette)))
 
 static inline QColor standardColor(int i)
 {
     const uchar *entry = standardPalette[i];
     return QColor(entry[0], entry[1], entry[2]);
 }
 
 class KColorComboPrivate
 {
 public:
     KColorComboPrivate(KColorCombo *qq);
 
     void addColors();
     void setCustomColor(const QColor &color, bool lookupInPresets = true);
 
     // slots
     void slotActivated(int index);
     void slotHighlighted(int index);
 
     KColorCombo *q;
     QList<QColor> colorList;
     QColor customColor;
     QColor internalcolor;
 };
 
 KColorComboPrivate::KColorComboPrivate(KColorCombo *qq)
     : q(qq)
     , customColor(Qt::white)
 {
 }
 
 void KColorComboPrivate::setCustomColor(const QColor &color, bool lookupInPresets)
 {
     if (lookupInPresets) {
         if (colorList.isEmpty()) {
             for (int i = 0; i < STANDARD_PALETTE_SIZE; ++i) {
                 if (standardColor(i) == color) {
                     q->setCurrentIndex(i + 1);
                     internalcolor = color;
                     return;
                 }
             }
         } else {
             int i = colorList.indexOf(color);
             if (i >= 0) {
                 q->setCurrentIndex(i + 1);
                 internalcolor = color;
                 return;
             }
         }
     }
 
     internalcolor = color;
     customColor = color;
     q->setItemData(0, customColor, KColorComboDelegate::ColorRole);
 }
 
 KColorCombo::KColorCombo(QWidget *parent)
     : QComboBox(parent)
     , d(new KColorComboPrivate(this))
 {
     setItemDelegate(new KColorComboDelegate(this));
     d->addColors();
 
     connect(this, &QComboBox::activated, this, [this](int index) {
         d->slotActivated(index);
     });
     connect(this, &QComboBox::highlighted, this, [this](int index) {
         d->slotHighlighted(index);
     });
 
     // select the white color
     setCurrentIndex(1);
     d->slotActivated(1);
 
     setMaxVisibleItems(13);
 }
 
 KColorCombo::~KColorCombo() = default;
 
 void KColorCombo::setColors(const QList<QColor> &colors)
 {
     clear();
     d->colorList = colors;
     d->addColors();
 }
 
 QList<QColor> KColorCombo::colors() const
 {
     if (d->colorList.isEmpty()) {
         QList<QColor> list;
         list.reserve(STANDARD_PALETTE_SIZE);
         for (int i = 0; i < STANDARD_PALETTE_SIZE; ++i) {
             list += standardColor(i);
         }
         return list;
     } else {
         return d->colorList;
     }
 }
 
 void KColorCombo::setColor(const QColor &col)
 {
     if (!col.isValid()) {
         return;
     }
 
     if (count() == 0) {
         d->addColors();
     }
 
     d->setCustomColor(col, true);
 }
 
 QColor KColorCombo::color() const
 {
     return d->internalcolor;
 }
 
 bool KColorCombo::isCustomColor() const
 {
     return d->internalcolor == d->customColor;
 }
 
 void KColorCombo::paintEvent(QPaintEvent *event)
 {
     Q_UNUSED(event)
     QStylePainter painter(this);
     painter.setPen(palette().color(QPalette::Text));
 
     QStyleOptionComboBox opt;
     initStyleOption(&opt);
     painter.drawComplexControl(QStyle::CC_ComboBox, opt);
 
     QRect frame = style()->subControlRect(QStyle::CC_ComboBox, &opt, QStyle::SC_ComboBoxEditField, this);
     painter.setRenderHint(QPainter::Antialiasing);
     painter.setPen(Qt::transparent);
     painter.setBrush(QBrush(d->internalcolor));
     painter.drawRoundedRect(frame.adjusted(1, 1, -1, -1), 2, 2);
 }
 
 void KColorCombo::showEmptyList()
 {
     clear();
 }
 
 void KColorComboPrivate::slotActivated(int index)
 {
     if (index == 0) {
         QColor c = QColorDialog::getColor(customColor, q);
         if (c.isValid()) {
             customColor = c;
             setCustomColor(customColor, false);
         }
     } else if (colorList.isEmpty()) {
         internalcolor = standardColor(index - 1);
     } else {
         internalcolor = colorList[index - 1];
     }
 
     Q_EMIT q->activated(internalcolor);
 }
 
 void KColorComboPrivate::slotHighlighted(int index)
 {
     if (index == 0) {
         internalcolor = customColor;
     } else if (colorList.isEmpty()) {
         internalcolor = standardColor(index - 1);
     } else {
         internalcolor = colorList[index - 1];
     }
 
     Q_EMIT q->highlighted(internalcolor);
 }
 
 void KColorComboPrivate::addColors()
 {
     q->addItem(KColorCombo::tr("Custom...", "@item:inlistbox Custom color"));
 
     if (colorList.isEmpty()) {
         for (int i = 0; i < STANDARD_PALETTE_SIZE; ++i) {
             q->addItem(QString());
             q->setItemData(i + 1, standardColor(i), KColorComboDelegate::ColorRole);
         }
     } else {
         for (int i = 0, count = colorList.count(); i < count; ++i) {
             q->addItem(QString());
             q->setItemData(i + 1, colorList[i], KColorComboDelegate::ColorRole);
         }
     }
 }
 
 #include "kcolorcombo.moc"
 #include "moc_kcolorcombo.cpp"