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/****************************************************************************
**
** Copyright (C) 2016 Jochen Becher
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt Creator.
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
****************************************************************************/
#include "dragtool.h"
#include "qmt/diagram_ui/diagram_mime_types.h"
#include <QPainter>
#include <QCursor>
#include <QDrag>
#include <QMouseEvent>
#include <QMimeData>
namespace ModelEditor {
namespace Internal {
class DragTool::DragToolPrivate {
public:
QIcon icon;
QSize iconSize;
QString title;
QString newElementName;
QString newElementId;
QString stereotype;
bool disableFrame = false;
bool framePainted = false;
};
DragTool::DragTool(const QIcon &icon, const QString &title, const QString &newElementName, const QString &newElementId,
const QString &stereotype, QWidget *parent)
: QWidget(parent),
d(new DragToolPrivate)
{
d->icon = icon;
d->iconSize = QSize(32, 32);
d->title = title;
d->newElementName = newElementName;
d->newElementId = newElementId;
d->stereotype = stereotype;
QMargins margins = contentsMargins();
if (margins.top() < 3)
margins.setTop(3);
if (margins.bottom() < 3)
margins.setBottom(3);
if (margins.left() < 3)
margins.setLeft(3);
if (margins.right() < 3)
margins.setRight(3);
setContentsMargins(margins);
}
DragTool::~DragTool()
{
delete d;
}
QSize DragTool::sizeHint() const
{
int width = 0;
int height = 0;
if (d->iconSize.width() > width)
width = d->iconSize.width();
height += d->iconSize.height();
QRect textRect = fontMetrics().boundingRect(QRect(), Qt::AlignLeft | Qt::TextSingleLine, d->title);
if (textRect.width() > width)
width = textRect.width();
height += textRect.height();
QMargins margins = contentsMargins();
width += margins.left() + margins.right();
height += margins.top() + margins.bottom();
return QSize(width, height);
}
void DragTool::paintEvent(QPaintEvent *event)
{
Q_UNUSED(event)
QMargins margins = contentsMargins();
QPixmap pixmap = d->icon.pixmap(d->iconSize, isEnabled() ? QIcon::Normal : QIcon::Disabled, QIcon::Off);
QPainter painter(this);
painter.drawPixmap((width() - static_cast<int>(pixmap.width() / pixmap.devicePixelRatio())) / 2,
margins.top() + static_cast<int>(d->iconSize.height() - pixmap.height() / pixmap.devicePixelRatio()) / 2,
pixmap);
QRect textRect = painter.boundingRect(QRect(), Qt::AlignLeft | Qt::TextSingleLine, d->title);
QRect boundingRect(0, d->iconSize.height(), width(), textRect.height());
painter.drawText(boundingRect, Qt::AlignHCenter | Qt::TextSingleLine, d->title);
// draw a weak frame if mouse is inside widget
if (!d->disableFrame && rect().contains(QWidget::mapFromGlobal(QCursor::pos()))) {
QRect rect(0, 0, width() - 1, height() - 1);
QPen pen = painter.pen();
pen.setStyle(Qt::DotLine);
painter.setPen(pen);
painter.drawRect(rect);
d->framePainted = true;
} else {
d->framePainted = false;
}
}
void DragTool::enterEvent(QEvent *event)
{
Q_UNUSED(event)
update();
}
void DragTool::leaveEvent(QEvent *event)
{
Q_UNUSED(event)
update();
}
void DragTool::mousePressEvent(QMouseEvent *event)
{
if (event->button() == Qt::LeftButton) {
const QMargins margins = contentsMargins();
const QRect iconRect((width() - d->iconSize.width()) / 2, margins.top(),
d->iconSize.width(), d->iconSize.height());
if (iconRect.contains(event->pos())) {
auto drag = new QDrag(this);
auto mimeData = new QMimeData;
QByteArray data;
QDataStream dataStream(&data, QIODevice::WriteOnly);
dataStream << d->newElementId << d->newElementName << d->stereotype;
mimeData->setData(QLatin1String(qmt::MIME_TYPE_NEW_MODEL_ELEMENTS), data);
drag->setMimeData(mimeData);
QPixmap pixmap = d->icon.pixmap(d->iconSize, QIcon::Normal, QIcon::Off);
QPainter painter(&pixmap);
painter.setCompositionMode(QPainter::CompositionMode_DestinationIn);
painter.fillRect(pixmap.rect(), QColor(0, 0, 0, 96));
drag->setPixmap(pixmap);
drag->setHotSpot(QPoint(drag->pixmap().width() / 2, drag->pixmap().height() / 2));
d->disableFrame = true;
update();
Qt::DropAction dropAction = drag->exec();
Q_UNUSED(dropAction)
d->disableFrame = false;
update();
}
}
}
void DragTool::mouseMoveEvent(QMouseEvent *event)
{
Q_UNUSED(event)
const bool containsMouse = rect().contains(QWidget::mapFromGlobal(QCursor::pos()));
if ((d->framePainted && !containsMouse) || (!d->framePainted && containsMouse))
update();
}
} // namespace Internal
} // namespace ModelEditor
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