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137 lines
4.9 KiB
137 lines
4.9 KiB
/* BEGIN_COMMON_COPYRIGHT_HEADER |
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* (c)LGPL2+ |
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* |
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* LXQt - a lightweight, Qt based, desktop toolset |
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* https://lxqt.org |
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* |
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* Copyright: 2010-2011 Razor team |
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* Authors: |
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* Alexander Sokoloff <[email protected]> |
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* Paulo Lieuthier <[email protected]> |
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* |
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* This program or library is free software; you can redistribute it |
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* and/or modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General |
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* Public License along with this library; if not, write to the |
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* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
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* Boston, MA 02110-1301 USA |
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* |
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* END_COMMON_COPYRIGHT_HEADER */ |
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#include "lxqthtmldelegate.h" |
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#include <QAbstractTextDocumentLayout> |
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#include <QTextDocument> |
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#include <QApplication> |
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using namespace LXQt; |
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HtmlDelegate::HtmlDelegate(const QSize iconSize, QObject* parent) : |
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QStyledItemDelegate(parent), |
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mIconSize(iconSize) |
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{ |
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} |
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HtmlDelegate::~HtmlDelegate() = default; |
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/************************************************ |
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************************************************/ |
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void HtmlDelegate::paint(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index) const |
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{ |
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if (!index.isValid()) |
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return; |
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QStyleOptionViewItem options = option; |
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initStyleOption(&options, index); |
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const bool is_right_to_left = Qt::RightToLeft == options.direction; |
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painter->save(); |
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QTextDocument doc; |
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doc.setHtml(options.text); |
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QIcon icon = options.icon; |
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// icon size |
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const QSize iconSize = icon.actualSize(mIconSize); |
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// center the icon vertically |
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QRect iconRect = QRect(8, qMax(options.rect.height() - iconSize.height(), 0) / 2, |
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iconSize.width(), iconSize.height()); |
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if (is_right_to_left) |
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{ |
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iconRect.moveLeft(options.rect.left() + options.rect.right() - iconRect.x() - iconRect.width() + 1); |
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} |
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// set doc size |
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// NOTE: Qt has a bug, because of which HTML tags are included in QTextDocument::setTextWidth() |
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// when the text is set by QTextDocument::setHtml(). |
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// As a result, the text height may be a little greater than needed. |
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doc.setTextWidth(options.rect.width() - iconRect.width() - 8 - 8); // 8-px icon-text spacing |
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// draw the item's panel |
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const QWidget* widget = option.widget; |
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QStyle* style = widget ? widget->style() : QApplication::style(); |
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style->drawPrimitive(QStyle::PE_PanelItemViewItem, &options, painter, widget); |
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// paint icon |
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painter->translate(options.rect.left(), options.rect.top()); |
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icon.paint(painter, iconRect); |
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// center the text vertically |
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painter->translate(0, qMax(static_cast<qreal>(options.rect.height()) - doc.size().height(), 0.0) / 2.0); |
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if (!is_right_to_left) |
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{ |
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// shift text right to make icon visible |
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painter->translate((iconRect.right() + 1) + 8, 0); |
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} |
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const QRect clip(0, 0, options.rect.width() - iconRect.width() - 8, options.rect.height()); |
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painter->setClipRect(clip); |
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// set text colors |
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QAbstractTextDocumentLayout::PaintContext ctx; |
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QPalette::ColorGroup colorGroup = (option.state & QStyle::State_Active) ? QPalette::Active : QPalette::Inactive; |
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if (option.state & QStyle::State_Selected) // selected items |
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ctx.palette.setColor(QPalette::Text, option.palette.color(colorGroup, QPalette::HighlightedText)); |
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else // ordinary items and those with an alternate base color (there is no alternate text color) |
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ctx.palette.setColor(QPalette::Text, option.palette.color(colorGroup, QPalette::Text)); |
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ctx.clip = clip; |
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doc.documentLayout()->draw(painter, ctx); |
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painter->restore(); |
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} |
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/************************************************ |
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************************************************/ |
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QSize HtmlDelegate::sizeHint(const QStyleOptionViewItem& option, const QModelIndex& index) const |
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{ |
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QStyleOptionViewItem options = option; |
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initStyleOption(&options, index); |
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const QSize iconSize = options.icon.actualSize(mIconSize); |
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// 8-px left, top and bottom margins for the icon |
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const QRect iconRect = QRect(8, 8, iconSize.width(), iconSize.height()); |
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const int w = options.rect.width(); |
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QTextDocument doc; |
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doc.setHtml(options.text); |
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if (w > 0) |
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doc.setTextWidth(static_cast<qreal>(w - (iconRect.right() + 1) - 8)); // 8-px icon-text spacing |
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else |
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doc.adjustSize(); |
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return {w > 0 ? w : iconRect.width() + 8 + qRound(doc.size().width()) + 8, |
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qMax(qRound(doc.size().height() + 8), // 4-px top/bottom text spacing |
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iconSize.height() + 16)}; |
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}
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