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/*
VeroRoute - Qt based Veroboard/Perfboard/PCB layout & routing application.
Copyright (C) 2017 Alex Lawrow ( dralx@users.sourceforge.net )
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU 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 General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "mainwindow.h"
#include "PolygonHelper.h"
MyScrollArea::MyScrollArea(QWidget* parent) : QScrollArea(parent), m_parent(parent)
{
m_lastTouchBegin = std::chrono::steady_clock::now();
}
bool MyScrollArea::viewportEvent(QEvent* event)
{
MainWindow* pMainWindow = (MainWindow*)m_parent;
switch( event->type() )
{
case QEvent::MouseButtonPress:
{
QMouseEvent* ev = (QMouseEvent*)event;
if ( pMainWindow ) pMainWindow->MousePressEvent(ev->pos(), ev->button() & Qt::LeftButton, ev->button() & Qt::RightButton);
event->accept();
return true;
}
case QEvent::MouseButtonDblClick:
{
QMouseEvent* ev = (QMouseEvent*)event;
if ( pMainWindow ) pMainWindow->MouseDoubleClickEvent(ev->pos());
event->accept();
return true;
}
case QEvent::MouseMove:
{
QMouseEvent* ev = (QMouseEvent*)event;
if ( pMainWindow ) pMainWindow->MouseMoveEvent(ev->pos());
event->accept();
return true;
}
case QEvent::MouseButtonRelease:
{
QMouseEvent* ev = (QMouseEvent*)event;
if ( pMainWindow ) pMainWindow->MouseReleaseEvent(ev->pos());
event->accept();
return true;
}
case QEvent::TouchCancel:
{
m_bTouchCancelled = true;
event->accept();
return true;
}
case QEvent::TouchBegin:
{
bool bDoubleClicked(false);
if ( !m_bTouchCancelled && !m_bDoubleClickCancelled )
{
const auto elapsed = std::chrono::steady_clock::now() - m_lastTouchBegin;
const auto duration_ms = std::chrono::duration_cast<std::chrono::milliseconds>(elapsed).count();
const auto effective_ms = ( duration_ms > m_releaseDuration_ms ) ? ( duration_ms - m_releaseDuration_ms ) : 0;
#ifdef VEROROUTE_DEBUG
if ( pMainWindow ) pMainWindow->m_labelDebug->setText(QString::number(effective_ms));
if ( pMainWindow ) pMainWindow->m_labelDebug->show();
#endif
bDoubleClicked = ( effective_ms >= 0 && effective_ms <= 500 );
}
m_bDoubleClickCancelled = bDoubleClicked; // Prevent daisy chaining of double-clicks
if ( pMainWindow )
{
QTouchEvent* ev = (QTouchEvent*)event;
const auto& points = ev->touchPoints();
m_maxPoints = points.size(); // Reset m_maxPoints
m_bTouchCancelled = false; // Reset m_bTouchCancelled
m_dSpread = 0; // Reset m_dSpread
if ( bDoubleClicked )
pMainWindow->MouseDoubleClickEvent(points.begin()->pos().toPoint());
else
pMainWindow->MousePressEvent(points.begin()->pos().toPoint());
}
m_lastTouchBegin = std::chrono::steady_clock::now(); // Processing the events could have taken some time, so measure from here
event->accept();
return true;
}
case QEvent::TouchUpdate:
{
if ( m_bTouchCancelled ) return QScrollArea::viewportEvent(event);
if ( pMainWindow )
{
QTouchEvent* ev = (QTouchEvent*)event;
const auto& points = ev->touchPoints();
const int numPoints = points.size();
m_maxPoints = std::max(m_maxPoints, numPoints);
if ( m_maxPoints > 1 ) m_bDoubleClickCancelled = true;
switch( numPoints )
{
case 1:
{
if ( m_maxPoints > 1 ) return QScrollArea::viewportEvent(event);
pMainWindow->MouseMoveEvent(points.begin()->pos().toPoint()); break; // Only ever had one point ==> mouse move
}
case 2: // 2 points ==> try handle zoom
{
if ( m_maxPoints > 2 ) return QScrollArea::viewportEvent(event);
const qreal dNewSpread = GetSpread(points); assert(dNewSpread > 0);
if ( m_dSpread == 0 )
{
m_dSpread = dNewSpread; // Initial spread measure
}
else if ( m_dSpread > 0 && dNewSpread > (m_dSpread * 1.20) && pMainWindow->CanZoomIn() ) // If we've increased the spread by 20%
{
m_dSpread = dNewSpread; // Update the spread measure ...
pMainWindow->ZoomIn(); // ... and zoom in
}
else if ( m_dSpread > 0 && dNewSpread < (m_dSpread * 0.833) && pMainWindow->CanZoomOut() ) // If we've decreased the spread by 20%
{
m_dSpread = dNewSpread; // Update the spread measure ...
pMainWindow->ZoomOut(); // ... and zoom out
}
else
return QScrollArea::viewportEvent(event);
break;
}
default: return QScrollArea::viewportEvent(event);
}
}
event->accept();
return true;
}
case QEvent::TouchEnd:
{
if ( m_bTouchCancelled || ( m_maxPoints > 1 ) ) return QScrollArea::viewportEvent(event);
if ( pMainWindow )
{
QTouchEvent* ev = (QTouchEvent*)event;
const auto& points = ev->touchPoints();
// The MouseReleaseEvent() can take some time due to updating the broken nets list. Measure how long it takes.
const auto begin = std::chrono::steady_clock::now();
pMainWindow->MouseReleaseEvent(points.begin()->pos().toPoint());
const auto elapsed = std::chrono::steady_clock::now() - begin;
m_releaseDuration_ms = std::chrono::duration_cast<std::chrono::milliseconds>(elapsed).count();
}
event->accept();
return true;
}
default:
return QScrollArea::viewportEvent(event);
}
}
qreal MyScrollArea::GetSpread(const QList<QTouchEvent::TouchPoint>& points) const
{
// Just use first 2 points
return ( points.size() > 1 ) ? PolygonHelper::Length( points[0].pos() - points[1].pos() ) : 0;
}
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