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/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** 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 Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
****************************************************************************/
#include "itemlibrarycomponents.h"
#include "customdraganddrop.h"
#include <QMimeData>
#include <QDebug>
#include <QImage>
#include <QPixmap>
#include <QDrag>
#include <QPainter>
#include <QLabel>
#include <itemlibraryinfo.h>
#include <QFileSystemModel>
#include <QProxyStyle>
enum { debug = 0 };
namespace QmlDesigner {
namespace Internal {
static void drawSelectionBackground(QPainter *painter, const QStyleOption &option)
{
painter->save();
QLinearGradient gradient;
QColor highlight = option.palette.highlight().color();
gradient.setColorAt(0, highlight.lighter(130));
gradient.setColorAt(1, highlight.darker(130));
gradient.setStart(option.rect.topLeft());
gradient.setFinalStop(option.rect.bottomLeft());
painter->fillRect(option.rect, gradient);
painter->setPen(highlight.lighter());
painter->drawLine(option.rect.topLeft(),option.rect.topRight());
painter->setPen(highlight.darker());
painter->drawLine(option.rect.bottomLeft(),option.rect.bottomRight());
painter->restore();
}
// This style basically allows us to span the entire row
// including the arrow indicators which would otherwise not be
// drawn by the delegate
class TreeViewStyle : public QProxyStyle
{
public:
void drawPrimitive(PrimitiveElement element, const QStyleOption *option, QPainter *painter, const QWidget * = 0) const
{
if (element == QStyle::PE_PanelItemViewRow) {
if (option->state & QStyle::State_Selected)
drawSelectionBackground(painter, *option);
}
}
int styleHint(StyleHint hint, const QStyleOption *option = 0, const QWidget *widget = 0, QStyleHintReturn *returnData = 0) const {
if (hint == SH_ItemView_ShowDecorationSelected)
return 0;
else
return QProxyStyle::styleHint(hint, option, widget, returnData);
}
};
ItemLibraryTreeView::ItemLibraryTreeView(QWidget *parent) :
QTreeView(parent)
{
setDragEnabled(true);
setDragDropMode(QAbstractItemView::DragOnly);
setUniformRowHeights(true);
connect(this, SIGNAL(clicked(QModelIndex)), this, SLOT(activateItem(QModelIndex)));
setHeaderHidden(true);
setIndentation(20);
setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
setAttribute(Qt::WA_MacShowFocusRect, false);
TreeViewStyle *style = new TreeViewStyle;
setStyle(style);
style->setParent(this);
m_delegate = new ResourceItemDelegate(this);
setItemDelegateForColumn(0, m_delegate);
}
// We need to implement startDrag ourselves since we cannot
// otherwise influence drag pixmap and hotspot in the standard
// implementation.
void ItemLibraryTreeView::startDrag(Qt::DropActions /* supportedActions */)
{
if (debug)
qDebug() << Q_FUNC_INFO;
QMimeData *mimeData = model()->mimeData(selectedIndexes());
if (!mimeData)
return;
QFileSystemModel *fileSystemModel = qobject_cast<QFileSystemModel*>(model());
Q_ASSERT(fileSystemModel);
QFileInfo fileInfo = fileSystemModel->fileInfo(selectedIndexes().front());
QPixmap pixmap(fileInfo.absoluteFilePath());
if (!pixmap.isNull()) {
CustomItemLibraryDrag *drag = new CustomItemLibraryDrag(this);
drag->setPreview(pixmap);
drag->setPixmap(QIcon(pixmap).pixmap(128, 128));
QMimeData *mimeData = new QMimeData;
mimeData->setData("application/vnd.bauhaus.libraryresource", fileInfo.absoluteFilePath().toUtf8());
drag->setMimeData(mimeData);
drag->exec();
}
}
void ItemLibraryTreeView::setModel(QAbstractItemModel *model)
{
QFileSystemModel *fileSystemModel = dynamic_cast<QFileSystemModel *>(model);
if (fileSystemModel) {
QTreeView::setModel(model);
m_delegate->setModel(fileSystemModel);
setColumnHidden(1, true);
setColumnHidden(2, true);
setColumnHidden(3, true);
setSortingEnabled(true);
}
}
void ItemLibraryTreeView::activateItem( const QModelIndex & /*index*/)
{
QMimeData *mimeData = model()->mimeData(selectedIndexes());
if (!mimeData)
return;
QString name;
QFileSystemModel *fileSystemModel = qobject_cast<QFileSystemModel*>(model());
Q_ASSERT(fileSystemModel);
QFileInfo fileInfo = fileSystemModel->fileInfo(selectedIndexes().front());
QPixmap pixmap(fileInfo.absoluteFilePath());
if (!pixmap.isNull()) {
name = "image^" + fileInfo.absoluteFilePath();
emit itemActivated(name);
}
}
void ResourceItemDelegate::paint(QPainter *painter,
const QStyleOptionViewItem &option, const QModelIndex &index) const
{
if (option.state & QStyle::State_Selected)
drawSelectionBackground(painter, option);
painter->save();
QIcon icon(m_model->fileIcon(index));
QPixmap pixmap(icon.pixmap(icon.availableSizes().front()));
painter->drawPixmap(option.rect.x(),option.rect.y()+2,pixmap);
QString myString(m_model->fileName(index));
// Check text length does not exceed available space
int extraSpace=12+pixmap.width();
QFontMetrics fm(option.font);
myString = fm.elidedText(myString,Qt::ElideMiddle,option.rect.width()-extraSpace);
painter->drawText(option.rect.bottomLeft()+QPoint(3+pixmap.width(),-8),myString);
painter->restore();
}
QSize ResourceItemDelegate::sizeHint(const QStyleOptionViewItem &/*option*/,
const QModelIndex &index) const
{
QIcon icon(m_model->fileIcon(index));
return icon.availableSizes().front() + QSize(25, 4);
}
void ResourceItemDelegate::setModel(QFileSystemModel *model)
{
m_model = model;
}
} // namespace Internal
} // namespace QmlDesigner
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