Initial commit

Code/Framework/AzToolsFramework/AzToolsFramework/Thumbnails/Thumbnail.cpp

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+/*
+* All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or
+* its licensors.
+*
+* For complete copyright and license terms please see the LICENSE at the root of this
+* distribution (the "License"). All use of this software is governed by the License,
+* or, if provided, by the license below or the license accompanying this file. Do not
+* remove or modify any license notices. This file is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+*
+*/
+
+#include <AzToolsFramework/Thumbnails/Thumbnail.h>
+AZ_PUSH_DISABLE_WARNING(4127 4251 4800 4244, "-Wunknown-warning-option") // 4127: conditional expression is constant
+                                                                         // 4251: 'QTextCodec::ConverterState::flags': class 'QFlags<QTextCodec::ConversionFlag>' needs to have dll-interface to be used by clients of struct 'QTextCodec::ConverterState'
+                                                                         // 4800: 'QTextBoundaryFinderPrivate *const ': forcing value to bool 'true' or 'false' (performance warning)
+                                                                         // 4244: conversion from 'int' to 'qint8', possible loss of data
+#include <QtConcurrent/QtConcurrent>
+AZ_POP_DISABLE_WARNING
+
+namespace AzToolsFramework
+{
+    namespace Thumbnailer
+    {
+        static const int DefaultIconSize = 16;
+
+        //////////////////////////////////////////////////////////////////////////
+        // ThumbnailKey
+        //////////////////////////////////////////////////////////////////////////
+        bool ThumbnailKey::IsReady() const { return m_ready; }
+
+        bool ThumbnailKey::UpdateThumbnail()
+        {
+            if (!IsReady())
+            {
+                return false;
+            }
+            emit UpdateThumbnailSignal();
+            return true;
+        }
+
+        //////////////////////////////////////////////////////////////////////////
+        // Thumbnail
+        //////////////////////////////////////////////////////////////////////////
+        Thumbnail::Thumbnail(SharedThumbnailKey key, int thumbnailSize)
+            : QObject()
+            , m_state(State::Unloaded)
+            , m_thumbnailSize(thumbnailSize)
+            , m_key(key)
+        {
+            connect(&m_watcher, &QFutureWatcher<void>::finished, this, [this]()
+                {
+                    if (m_state == State::Loading)
+                    {
+                        m_state = State::Ready;
+                    }
+                    Q_EMIT Updated();
+                });
+        }
+
+        Thumbnail::~Thumbnail() = default;
+
+        bool Thumbnail::operator==(const Thumbnail& other) const
+        {
+            return m_key == other.m_key;
+        }
+
+        void Thumbnail::Load()
+        {
+            if (m_state == State::Unloaded)
+            {
+                m_state = State::Loading;
+                QFuture<void> future = QtConcurrent::run([this](){ LoadThread(); });
+                m_watcher.setFuture(future);
+            }
+        }
+
+        QPixmap Thumbnail::GetPixmap() const
+        {
+            return GetPixmap(QSize(DefaultIconSize, DefaultIconSize));
+        }
+
+        QPixmap Thumbnail::GetPixmap(const QSize& size) const
+        {
+            if (m_icon.isNull())
+            {
+                return m_pixmap;
+            }
+
+            return m_icon.pixmap(size);
+        }
+
+        SharedThumbnailKey Thumbnail::GetKey() const
+        {
+            return m_key;
+        }
+
+        Thumbnail::State Thumbnail::GetState() const
+        {
+            return m_state;
+        }
+
+    } // namespace Thumbnailer
+} // namespace AzToolsFramework
+
+#include "Thumbnails/moc_Thumbnail.cpp"