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Copy pathQGVMapRubberBand.cpp
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108 lines (97 loc) · 2.79 KB
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/***************************************************************************
* QGeoView is a Qt / C ++ widget for visualizing geographic data.
* Copyright (C) 2018-2025 Andrey Yaroshenko.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, see https://www.gnu.org/licenses.
****************************************************************************/
#include "QGVMapRubberBand.h"
QGVMapRubberBand::QGVMapRubberBand(QWidget* parent)
: QObject(parent)
{
setMinSelection(QSize(0, 0));
setStartPoint(QPoint(0, 0));
}
void QGVMapRubberBand::setMinSelection(const QSize& min)
{
mMin = min;
}
void QGVMapRubberBand::setStartPoint(const QPoint& point)
{
mStartPoint = point;
mEndPoint = point;
updateRect();
}
void QGVMapRubberBand::setEndPoint(const QPoint& point)
{
mEndPoint = point;
updateRect();
}
bool QGVMapRubberBand::isActive() const
{
return mRubberBand != nullptr;
}
bool QGVMapRubberBand::isSelection() const
{
if (isActive() == false) {
return false;
}
const QRect rect = getRect();
return rect.width() > mMin.width() && rect.height() > mMin.height();
}
QRect QGVMapRubberBand::getRect() const
{
QRect result;
if (mStartPoint.x() <= mEndPoint.x()) {
result.setLeft(mStartPoint.x());
result.setRight(mEndPoint.x());
} else {
result.setLeft(mEndPoint.x());
result.setRight(mStartPoint.x());
}
if (mStartPoint.y() <= mEndPoint.y()) {
result.setTop(mStartPoint.y());
result.setBottom(mEndPoint.y());
} else {
result.setTop(mEndPoint.y());
result.setBottom(mStartPoint.y());
}
return result;
}
void QGVMapRubberBand::showRect()
{
QWidget* myParent = nullptr;
if (parent() != nullptr) {
myParent = dynamic_cast<QWidget*>(parent());
}
if (myParent == nullptr) {
return;
}
mRubberBand.reset(new QRubberBand(QRubberBand::Rectangle, myParent));
updateRect();
}
void QGVMapRubberBand::hideRect()
{
mRubberBand.reset(nullptr);
}
void QGVMapRubberBand::updateRect()
{
if (isActive()) {
mRubberBand->setGeometry(getRect());
if (isSelection()) {
mRubberBand->show();
} else {
mRubberBand->hide();
}
}
}