guthadam
923f234d71
This change adds support for streaming image thumbnails in the asset browser tree and thumbnail widget. This is a prerequisite for displaying image previews inside of the material inspector. https://jira.agscollab.com/browse/ATOM-15326 https://jira.agscollab.com/browse/ATOM-14003
93 lines
3.2 KiB
C++
93 lines
3.2 KiB
C++
/*
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* All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or
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* its licensors.
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*
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* For complete copyright and license terms please see the LICENSE at the root of this
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* distribution (the "License"). All use of this software is governed by the License,
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* or, if provided, by the license below or the license accompanying this file. Do not
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* remove or modify any license notices. This file is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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*
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*/
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#include <AzCore/PlatformDef.h>
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#include <AzToolsFramework/Thumbnails/ThumbnailWidget.h>
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#include <AzToolsFramework/Thumbnails/ThumbnailerBus.h>
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// 4127: conditional expression is constant
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// 4800 'uint': forcing value to bool 'true' or 'false' (performance warning)
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// 4251: 'QPainter::d_ptr': class 'QScopedPointer<QPainterPrivate,QScopedPointerDeleter<T>>' needs to have dll-interface to be used by clients of class 'QPainter'
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AZ_PUSH_DISABLE_WARNING(4127 4800 4251, "-Wunknown-warning-option")
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#include <QPainter>
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#include <QPixmap>
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#include <QtGlobal>
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AZ_POP_DISABLE_WARNING
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namespace AzToolsFramework
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{
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namespace Thumbnailer
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{
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ThumbnailWidget::ThumbnailWidget(QWidget* parent)
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: QWidget(parent)
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{
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}
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void ThumbnailWidget::SetThumbnailKey(SharedThumbnailKey key, const char* contextName)
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{
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if (m_key)
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{
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disconnect(m_key.data(), &ThumbnailKey::ThumbnailUpdatedSignal, this, &ThumbnailWidget::KeyUpdatedSlot);
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}
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m_key = key;
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m_contextName = contextName;
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connect(m_key.data(), &ThumbnailKey::ThumbnailUpdatedSignal, this, &ThumbnailWidget::KeyUpdatedSlot);
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repaint();
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}
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void ThumbnailWidget::ClearThumbnail()
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{
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m_key.clear();
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repaint();
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}
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int ThumbnailWidget::heightForWidth(int w) const
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{
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return w;
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}
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QSize ThumbnailWidget::sizeHint() const
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{
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int w = this->width();
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return QSize(w, heightForWidth(w));
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}
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void ThumbnailWidget::paintEvent(QPaintEvent* event)
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{
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if (m_key)
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{
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// thumbnail instance is not stored locally, but retrieved each paintEvent since thumbnail mapped to a specific key may change
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SharedThumbnail thumbnail;
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ThumbnailerRequestsBus::BroadcastResult(thumbnail, &ThumbnailerRequests::GetThumbnail, m_key, m_contextName.c_str());
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QPainter painter(this);
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// Scaling and centering pixmap within bounds to preserve aspect ratio
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const QPixmap pixmap = thumbnail->GetPixmap().scaled(size(), Qt::KeepAspectRatio, Qt::SmoothTransformation);
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const QSize sizeDelta = size() - pixmap.size();
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const QPoint pointDelta = QPoint(sizeDelta.width() / 2, sizeDelta.height() / 2);
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painter.drawPixmap(pointDelta, pixmap);
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}
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QWidget::paintEvent(event);
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}
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void ThumbnailWidget::KeyUpdatedSlot()
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{
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repaint();
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}
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} // namespace Thumbnailer
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} // namespace AzToolsFramework
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#include "Thumbnails/moc_ThumbnailWidget.cpp"
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