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/*
Copyright 2006-2019 The QElectroTech Team
This file is part of QElectroTech.
QElectroTech 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 2 of the License, or
(at your option) any later version.
QElectroTech 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 QElectroTech. If not, see <http://www.gnu.org/licenses/>.
*/
#include "elementstreeview.h"
#include "elementcollectionitem.h"
#include "elementslocation.h"
#include "elementfactory.h"
#include "qeticons.h"
#include "element.h"
#include <QDrag>
#include <QStandardItemModel>
static int MAX_DND_PIXMAP_WIDTH = 500;
static int MAX_DND_PIXMAP_HEIGHT = 375;
/**
* @brief ElementsTreeView::ElementsTreeView
* @param parent
*/
ElementsTreeView::ElementsTreeView(QWidget *parent) :
QTreeView(parent)
{}
/**
* @brief ElementsTreeView::startDrag
* Reimplemented from QTreeView
* @param supportedActions
*/
void ElementsTreeView::startDrag(Qt::DropActions supportedActions)
{
QModelIndex index = currentIndex();
if (!index.isValid()) {
QTreeView::startDrag(supportedActions);
return;
}
if (QStandardItemModel *qsim = static_cast<QStandardItemModel *>(model())) {
if (ElementCollectionItem *eci = static_cast<ElementCollectionItem *>(qsim->itemFromIndex(index))) {
ElementsLocation loc (eci->collectionPath());
if (loc.exist()) {
startElementDrag(loc);
return;
}
}
}
QTreeView::startDrag(supportedActions);
}
/**
* @brief ElementsTreeView::startElementDrag
* Build a QDrag according to the content of @location
* @param location : location to use for create the content of the QDrag
*/
void ElementsTreeView::startElementDrag(const ElementsLocation &location)
{
if (!location.exist())
return;
QDrag *drag = new QDrag(this);
QString location_str = location.toString();
QMimeData *mime_data = new QMimeData();
mime_data->setText(location_str);
if (location.isDirectory())
{
mime_data->setData("application/x-qet-category-uri", location_str.toLatin1());
drag->setPixmap(QET::Icons::Folder.pixmap(22, 22));
}
else if (location.isElement())
{
mime_data->setData("application/x-qet-element-uri", location_str.toLatin1());
//Build the element for set the pixmap of the QDrag
int elmt_creation_state;
Element *temp_elmt = ElementFactory::Instance()->createElement(location, nullptr, &elmt_creation_state);
if (elmt_creation_state)
{
delete temp_elmt;
return;
}
QPixmap elmt_pixmap(temp_elmt->pixmap());
QPoint elmt_hotspot(temp_elmt->hotspot());
//Adjust the size of the pixmap if he is too big
QPoint elmt_pixmap_size(elmt_pixmap.width(), elmt_pixmap.height());
if (elmt_pixmap.width() > MAX_DND_PIXMAP_WIDTH || elmt_pixmap.height() > MAX_DND_PIXMAP_HEIGHT)
{
elmt_pixmap = elmt_pixmap.scaled(MAX_DND_PIXMAP_WIDTH, MAX_DND_PIXMAP_HEIGHT, Qt::KeepAspectRatio);
elmt_hotspot = QPoint(
elmt_hotspot.x() * elmt_pixmap.width() / elmt_pixmap_size.x(),
elmt_hotspot.y() * elmt_pixmap.height() / elmt_pixmap_size.y()
);
}
drag->setPixmap(elmt_pixmap);
drag->setHotSpot(elmt_hotspot);
delete temp_elmt;
}
drag->setMimeData(mime_data);
drag->exec(Qt::CopyAction);
}
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