mirror of
https://github.com/RetroShare/RetroShare.git
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119 lines
3.8 KiB
C++
119 lines
3.8 KiB
C++
/*******************************************************************************
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* gui/common/RSTreeView.cpp *
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* *
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* Copyright (C) 2010 RetroShare Team <retroshare.project@gmail.com> *
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* *
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* This program is free software: you can redistribute it and/or modify *
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* it under the terms of the GNU Affero General Public License as *
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* published by the Free Software Foundation, either version 3 of the *
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* License, or (at your option) any later version. *
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* *
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* This program 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 *
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* GNU Affero General Public License for more details. *
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* *
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* You should have received a copy of the GNU Affero General Public License *
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* along with this program. If not, see <https://www.gnu.org/licenses/>. *
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* *
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*******************************************************************************/
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#include "RSTreeView.h"
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#include "util/rsdebug.h"
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#include <QPainter>
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#include <QResizeEvent>
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//#define DEBUG_RSTREEVIEW
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RSTreeView::RSTreeView(QWidget *parent)
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: QTreeView(parent), autoSelect(false)
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{
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setMouseTracking(false); // normally the default, but who knows if it's not going to change in the future.
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}
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void RSTreeView::wheelEvent(QWheelEvent *e)
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{
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if(e->modifiers() == Qt::ControlModifier)
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{
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emit zoomRequested(e->angleDelta().y() > 0);
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return;
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}
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else
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QTreeView::wheelEvent(e);
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}
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void RSTreeView::mouseMoveEvent(QMouseEvent *e)
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{
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#ifdef DEBUG_RSTREEVIEW
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RS_DBG(e->localPos().x(), ":", e->localPos().y());
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#endif
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if (autoSelect)
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{
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QModelIndex idx = indexAt(e->pos());
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if(idx.isValid() && idx != selectionModel()->currentIndex())
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{
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#ifdef DEBUG_RSTREEVIEW
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RS_DBG("Selection changed");
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#endif
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selectionModel()->setCurrentIndex(idx,QItemSelectionModel::ClearAndSelect);
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}
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}
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QTreeView::mouseMoveEvent(e);
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}
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void RSTreeView::leaveEvent(QEvent *e)
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{
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#ifdef DEBUG_RSTREEVIEW
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RS_DBG("");
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#endif
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if (autoSelect)
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{
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auto fp = focusPolicy();
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setFocusPolicy(Qt::NoFocus); // To not select first index when resetting current index.
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selectionModel()->setCurrentIndex(QModelIndex(),QItemSelectionModel::Clear); // Close editor
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setFocusPolicy(fp);
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}
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QTreeView::leaveEvent(e);
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}
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void RSTreeView::setAutoSelect(bool b)
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{
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autoSelect = b; // Keep this because setMouseTracking can be called outside.
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setMouseTracking(b);
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}
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void RSTreeView::resizeEvent(QResizeEvent *e)
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{
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QTreeView::resizeEvent(e);
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emit sizeChanged(e->size());
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}
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void RSTreeView::setPlaceholderText(const QString &text)
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{
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placeholderText = text;
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viewport()->repaint();
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}
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void RSTreeView::paintEvent(QPaintEvent *event)
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{
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QTreeView::paintEvent(event);
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if (placeholderText.isEmpty() == false && model() && model()->rowCount() == 0) {
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QWidget *vieportWidget = viewport();
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QPainter painter(vieportWidget);
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QPen pen = painter.pen();
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QColor color = pen.color();
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color.setAlpha(128);
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pen.setColor(color);
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painter.setPen(pen);
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painter.drawText(QRect(QPoint(), vieportWidget->size()), Qt::AlignHCenter | Qt::AlignVCenter | Qt::TextWordWrap, placeholderText);
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}
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};
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