wasm: add local file access manual test

Testes file load and save, computes a sha256 hash
for verifying file content.

Change-Id: Id7f697c4dfd41e051442350f4050f04b493cfc18
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>

2 files changed, 108 insertions, 0 deletions

diff --git a/tests/manual/wasm/localfiles/localfiles.pro b/tests/manual/wasm/localfiles/localfiles.pro
new file mode 100644
index 0000000000..04ad4c0ce1
--- /dev/null
+++ b/tests/manual/wasm/localfiles/localfiles.pro
@@ -0,0 +1,8 @@
+TEMPLATE = app
+TARGET = localfiles
+QT += core gui widgets
+
+OBJECTS_DIR = .obj
+MOC_DIR = .moc
+
+SOURCES += main.cpp
diff --git a/tests/manual/wasm/localfiles/main.cpp b/tests/manual/wasm/localfiles/main.cpp
new file mode 100644
index 0000000000..9dfc30885c
--- /dev/null
+++ b/tests/manual/wasm/localfiles/main.cpp
@@ -0,0 +1,100 @@
+/****************************************************************************
+**
+** Copyright (C) 2019 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** 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.
+**
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#include <QtWidgets/QtWidgets>
+
+int main(int argc, char **argv)
+{
+    QApplication app(argc, argv);
+
+    QByteArray content;
+
+    QWidget loadFileUi;
+    QVBoxLayout *layout = new QVBoxLayout();
+    QPushButton *loadFile = new QPushButton("Load File");
+    QLabel *fileInfo = new QLabel("Opened file:");
+    fileInfo->setTextInteractionFlags(Qt::TextSelectableByMouse);
+    QLabel *fileHash = new QLabel("Sha256:");
+    fileHash->setTextInteractionFlags(Qt::TextSelectableByMouse);
+    QPushButton *saveFile = new QPushButton("Save File");
+    saveFile->setEnabled(false);
+
+    auto onFileReady = [=, &content](const QString &fileName, const QByteArray &fileContents) {
+        content = fileContents;
+        fileInfo->setText(QString("Opened file: %1 size: %2").arg(fileName).arg(fileContents.size()));
+        saveFile->setEnabled(true);
+
+        auto computeDisplayFileHash = [=](){
+          QByteArray hash = QCryptographicHash::hash(fileContents, QCryptographicHash::Sha256);
+          fileHash->setText(QString("Sha256: %1").arg(QString(hash.toHex())));
+        };
+
+        QTimer::singleShot(100, computeDisplayFileHash); // update UI before computing hash
+    };
+    auto onLoadClicked = [=](){
+        QFileDialog::getOpenFileContent("*.*", onFileReady);
+    };
+    QObject::connect(loadFile, &QPushButton::clicked, onLoadClicked);
+
+    auto onSaveClicked = [=, &content]() {
+        QFileDialog::saveFileContent(content, "qtsavefiletest.dat");
+    };
+    QObject::connect(saveFile, &QPushButton::clicked, onSaveClicked);
+
+    layout->addWidget(loadFile);
+    layout->addWidget(fileInfo);
+    layout->addWidget(fileHash);
+    layout->addWidget(saveFile);
+    layout->addStretch();
+
+    loadFileUi.setLayout(layout);
+    loadFileUi.show();
+
+    return app.exec();
+}