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//##########################################################################
//# #
//# CLOUDCOMPARE #
//# #
//# 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; version 2 or later of the License. #
//# #
//# 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. #
//# #
//# COPYRIGHT: CloudCompare project #
//# #
//##########################################################################
#include "ccPickingHub.h"
//Qt
#include <QMdiSubWindow>
ccPickingHub::ccPickingHub(ccMainAppInterface* app, QObject* parent/*=0*/)
: QObject(parent)
, m_app(app)
, m_activeGLWindow(nullptr)
, m_pickingMode(ccGLWindow::POINT_OR_TRIANGLE_PICKING)
, m_autoEnableOnActivatedWindow(true)
, m_exclusive(false)
{
}
//void ccPickingHub::setPickingMode(ccGLWindow::PICKING_MODE mode, bool autoEnableOnActivatedWindow/*=true*/)
//{
// m_pickingMode = mode;
// m_autoEnableOnActivatedWindow = autoEnableOnActivatedWindow;
//}
void ccPickingHub::togglePickingMode(bool state)
{
if (m_activeGLWindow)
{
m_activeGLWindow->setPickingMode(state ? m_pickingMode : ccGLWindow::DEFAULT_PICKING);
}
}
void ccPickingHub::onActiveWindowChanged(QMdiSubWindow* mdiSubWindow)
{
ccGLWindow* glWindow = (mdiSubWindow ? GLWindowFromWidget(mdiSubWindow->widget()) : nullptr);
if (m_activeGLWindow == glWindow)
{
//nothing to do
return;
}
if (m_activeGLWindow)
{
//take care of the previously linked window
togglePickingMode(false);
disconnect(m_activeGLWindow);
m_activeGLWindow = nullptr;
}
if (glWindow)
{
//link this new window
connect(glWindow, &ccGLWindow::itemPicked, this, &ccPickingHub::processPickedItem, Qt::UniqueConnection);
connect(glWindow, &QObject::destroyed, this, &ccPickingHub::onActiveWindowDeleted);
m_activeGLWindow = glWindow;
if (m_autoEnableOnActivatedWindow && !m_listeners.empty())
{
togglePickingMode(true);
}
}
}
void ccPickingHub::onActiveWindowDeleted(QObject*)
{
m_activeGLWindow = nullptr;
}
void ccPickingHub::processPickedItem(ccHObject* entity, unsigned itemIndex, int x, int y, const CCVector3& P3D)
{
if (m_listeners.empty())
{
return;
}
ccPickingListener::PickedItem item;
{
item.clickPoint = QPoint(x, y);
item.entity = entity;
item.itemIndex = itemIndex;
item.P3D = P3D;
}
//copy the list of listeners, in case the user call 'removeListener' in 'onItemPicked'
std::set< ccPickingListener* > listeners = m_listeners;
for (ccPickingListener* l : listeners)
{
if (l)
{
l->onItemPicked(item);
}
}
}
bool ccPickingHub::addListener( ccPickingListener* listener,
bool exclusive/*=false*/,
bool autoStartPicking/*=true*/,
ccGLWindow::PICKING_MODE mode/*=ccGLWindow::POINT_OR_TRIANGLE_PICKING*/)
{
if (!listener)
{
assert(false);
return false;
}
//if listeners are already registered
if (!m_listeners.empty())
{
if (m_exclusive) //a previous listener is exclusive
{
assert(m_listeners.size() == 1);
if (m_listeners.find(listener) == m_listeners.end())
{
ccLog::Warning("[ccPickingHub::addListener] Exclusive listener already registered: stop the other tool relying on point picking first");
return false;
}
}
else if (exclusive) //this new listener is exclusive
{
if (m_listeners.size() > 1 || m_listeners.find(listener) == m_listeners.end())
{
ccLog::Warning("[ccPickingHub::addListener] Attempt to register an exclusive listener while other listeners are already registered");
return false;
}
}
else if (mode != m_pickingMode)
{
if (m_listeners.size() > 1 || m_listeners.find(listener) == m_listeners.end())
{
ccLog::Warning("[ccPickingHub::addListener] Other listeners are already registered with a different picking mode");
return false;
}
}
}
try
{
m_listeners.insert(listener);
}
catch (const std::bad_alloc&)
{
//not enough memory
ccLog::Warning("[ccPickingHub::addListener] Not enough memory");
return false;
}
m_exclusive = exclusive;
m_pickingMode = mode;
if (autoStartPicking)
{
togglePickingMode(true);
}
return true;
}
void ccPickingHub::removeListener(ccPickingListener* listener, bool autoStopPickingIfLast/*=true*/)
{
m_listeners.erase(listener);
if (m_listeners.empty())
{
m_exclusive = false; //auto drop the 'exclusive' flag
togglePickingMode(false);
}
}
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