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158 lines
4.8 KiB
158 lines
4.8 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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* http://razor-qt.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 <sokoloff.a@gmail.com>
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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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* 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 "lxqtpageselectwidget.h"
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#include <QDebug>
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#include <QStyledItemDelegate>
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#include <QEvent>
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#include <QScrollBar>
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#include <QApplication>
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using namespace LXQt;
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class PageSelectWidgetItemDelegate: public QStyledItemDelegate
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{
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public:
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explicit PageSelectWidgetItemDelegate(PageSelectWidget *parent = 0);
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QSize sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const;
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private:
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PageSelectWidget* mView;
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};
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/************************************************
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************************************************/
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PageSelectWidgetItemDelegate::PageSelectWidgetItemDelegate(PageSelectWidget *parent):
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QStyledItemDelegate(parent),
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mView(parent)
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{
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}
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/************************************************
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************************************************/
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QSize PageSelectWidgetItemDelegate::sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const
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{
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QSize size = QStyledItemDelegate::sizeHint(option, index);
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//all items should have unified width
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QStyle * style = option.widget ? option.widget->style() : QApplication::style();
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//Note: this margin logic follows code in QCommonStylePrivate::viewItemLayout()
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const int margin = style->pixelMetric(QStyle::PM_FocusFrameHMargin, &option, option.widget) + 1;
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//considering the icon size too
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size.setWidth(qMax(mView->maxTextWidth(), option.decorationSize.width()));
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size.rwidth() += 2 * margin;
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return size;
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}
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/************************************************
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************************************************/
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PageSelectWidget::PageSelectWidget(QWidget *parent) :
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QListWidget(parent)
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, mMaxTextWidth(0)
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{
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setSelectionRectVisible(false);
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setViewMode(IconMode);
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setSpacing(2);
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setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Expanding);
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setWordWrap(true);
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setDragEnabled(NoDragDrop);
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setEditTriggers(NoEditTriggers);
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setTextElideMode(Qt::ElideNone);
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setContentsMargins(0, 0, 0, 0);
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setItemDelegate(new PageSelectWidgetItemDelegate(this));
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connect(model(), &QAbstractItemModel::rowsInserted, this, &PageSelectWidget::updateMaxTextWidth);
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connect(model(), &QAbstractItemModel::rowsRemoved, this, &PageSelectWidget::updateMaxTextWidth);
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connect(model(), &QAbstractItemModel::dataChanged, this, &PageSelectWidget::updateMaxTextWidth);
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}
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/************************************************
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************************************************/
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PageSelectWidget::~PageSelectWidget()
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{
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}
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/************************************************
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************************************************/
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int PageSelectWidget::maxTextWidth() const
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{
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return mMaxTextWidth;
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}
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/************************************************
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************************************************/
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QSize PageSelectWidget::viewportSizeHint() const
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{
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const int spacing2 = spacing() * 2;
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QSize size{sizeHintForColumn(0) + spacing2, (sizeHintForRow(0) + spacing2) * count()};
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if (verticalScrollBar()->isVisible())
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size.rwidth() += verticalScrollBar()->sizeHint().width();
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return size;
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}
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/************************************************
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************************************************/
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QSize PageSelectWidget::minimumSizeHint() const
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{
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return QSize{0, 0};
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}
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/************************************************
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************************************************/
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void PageSelectWidget::updateMaxTextWidth()
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{
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for(int i = count() - 1; 0 <= i; --i)
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{
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const QRect r = fontMetrics().boundingRect(QRect{}, Qt::AlignLeft | Qt::TextWordWrap, item(i)->text());
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mMaxTextWidth = qMax(mMaxTextWidth, r.width());
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}
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}
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/************************************************
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************************************************/
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bool PageSelectWidget::event(QEvent * event)
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{
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if (QEvent::StyleChange == event->type())
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updateMaxTextWidth();
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return QListWidget::event(event);
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}
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