qt5base-lts/tests/manual/wasm/clipboard/mainwindow.cpp
Lorn Potter d490501641 wasm: add support for drag into browser window
Drag and drop into the browser will work.
Drag and drop out of the browser will not.

Fixes: QTBUG-102242
Change-Id: Id9981ab6f9514535e1409bec18068790833a67a6
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
2022-05-10 01:20:45 +00:00

359 lines
12 KiB
C++

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#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QClipboard>
#include <QMimeData>
#include <QImageReader>
#include <QBuffer>
#include <QRandomGenerator>
#include <QPainter>
#include <QKeyEvent>
#include <QMimeDatabase>
#include <QFileInfo>
#ifdef Q_OS_WASM
#include <emscripten.h>
#include <emscripten/html5.h>
#include <emscripten/val.h>
#include <emscripten/bind.h>
using namespace emscripten;
#endif
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
, ui(new Ui::MainWindow)
{
ui->setupUi(this);
ui->imageLabel->installEventFilter(this);
ui->imageLabel->setBackgroundRole(QPalette::Base);
ui->imageLabel->setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Ignored);
ui->imageLabel->setScaledContents(true);
setAcceptDrops(true);
clipboard = QGuiApplication::clipboard();
connect(
clipboard, &QClipboard::dataChanged,
[=]() {
ui->textEdit_2->insertHtml("<b>Clipboard data changed:</b><br>");
const QMimeData *mimeData = clipboard->mimeData();
QByteArray ba;
for (auto mimetype : mimeData->formats()) {
qDebug() << Q_FUNC_INFO << mimetype;
ba = mimeData->data(mimetype);
}
QString sizeStr;
if (mimeData->hasImage()) {
qsizetype imageSize = qvariant_cast<QImage>(mimeData->imageData()).sizeInBytes();
sizeStr.setNum(imageSize);
ui->textEdit_2->insertHtml("has Image data: " + sizeStr + "<br>");
}
if (mimeData->hasHtml()) {
int size = mimeData->html().length();
sizeStr.setNum(size);
ui->textEdit_2->insertHtml("has html data: " + sizeStr + "<br>");
}
if (mimeData->hasText()) {
int size = mimeData->text().length();
sizeStr.setNum(size);
ui->textEdit_2->insertHtml("has text data: " + sizeStr + "<br>");
}
ui->textEdit_2->insertHtml(mimeData->formats().join(" | ")+ "<br>");
ui->textEdit_2->ensureCursorVisible();
const QString message = tr("Clipboard changed, %1 ")
.arg(mimeData->formats().join(' '));
statusBar()->showMessage(message + sizeStr);
}
);
#ifdef Q_OS_WASM
val clipboard = val::global("navigator")["clipboard"];
bool hasClipboardApi = (!clipboard.isUndefined() && !clipboard["readText"].isUndefined());
QString messageApi;
if (hasClipboardApi)
messageApi = QStringLiteral("Using Clipboard API");
else
messageApi = QStringLiteral("Using Clipboard events");
ui->label->setText(messageApi);
#else
ui->label->setText("desktop clipboard");
#endif
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::on_setTextButton_clicked()
{
QGuiApplication::clipboard()->setText(ui->textEdit->textCursor().selectedText());
}
static QImage clipboardImage()
{
if (const QMimeData *mimeData = QGuiApplication::clipboard()->mimeData()) {
if (mimeData->hasImage()) {
const QImage image = qvariant_cast<QImage>(mimeData->imageData());
if (!image.isNull())
return image;
}
}
return QImage();
}
static QByteArray clipboardBinary()
{
if (const QMimeData *mimeData = QGuiApplication::clipboard()->mimeData()) {
if (mimeData->formats().contains("application/octet-stream")) {
const QByteArray ba = qvariant_cast<QByteArray>(mimeData->data("application/octet-stream"));
qDebug() << Q_FUNC_INFO << ba;
if (!ba.isNull())
return ba;
}
}
return QByteArray();
}
void MainWindow::on_pasteImageButton_clicked()
{
const QImage newImage = clipboardImage();
if (newImage.isNull()) {
qDebug() << "No image in clipboard";
const QString message = tr("No image in clipboard")
.arg(newImage.width()).arg(newImage.height()).arg(newImage.depth());
statusBar()->showMessage(message);
} else {
setImage(newImage);
setWindowFilePath(QString());
const QString message = tr("Obtained image from clipboard, %1x%2, Depth: %3")
.arg(newImage.width()).arg(newImage.height()).arg(newImage.depth());
statusBar()->showMessage(message);
}
}
void MainWindow::setImage(const QImage &newImage)
{
image = newImage;
ui->imageLabel->setPixmap(QPixmap::fromImage(image));
}
void MainWindow::on_pasteTextButton_clicked()
{
ui->textEdit->insertPlainText(QGuiApplication::clipboard()->text());
}
void MainWindow::on_copyBinaryButton_clicked()
{
QByteArray ba;
ba.resize(10);
ba[0] = 0x3c;
ba[1] = 0xb8;
ba[2] = 0x64;
ba[3] = 0x18;
ba[4] = 0xca;
ba[5] = 0xca;
ba[6] = 0x18;
ba[7] = 0x64;
ba[8] = 0xb8;
ba[9] = 0x3c;
QMimeData *mimeData = new QMimeData();
mimeData->setData("application/octet-stream", ba);
QGuiApplication::clipboard()->setMimeData(mimeData);
const QString message = tr("Copied binary to clipboard: " + ba + " 10 bytes");
statusBar()->showMessage(message);
}
void MainWindow::on_pasteBinaryButton_clicked()
{
const QByteArray ba = clipboardBinary();
if (ba.isNull()) {
qDebug() << "No binary in clipboard";
const QString message = tr("No binary in clipboard");
statusBar()->showMessage(message);
} else {
setWindowFilePath(QString());
const QString message = tr("Obtained binary from clipboard: " + ba);
statusBar()->showMessage(message);
}
}
void MainWindow::on_comboBox_textActivated(const QString &arg1)
{
QImage image(QSize(150,100), QImage::Format_RGB32);
QPainter painter(&image);
painter.fillRect(QRectF(0,0,150,100),generateRandomColor());
painter.fillRect(QRectF(20,30,130,40),generateRandomColor());
painter.setPen(QPen(generateRandomColor()));
painter.drawText(QRect(25,30,130,40),"Qt WebAssembly");
QByteArray ba;
QBuffer buffer(&ba);
buffer.open(QIODevice::WriteOnly);
image.save(&buffer, arg1.toLocal8Bit());
qDebug() << ba.mid(0,10) << ba.length();
qDebug() << Q_FUNC_INFO << image.sizeInBytes();
QGuiApplication::clipboard()->setImage(image);
}
QColor MainWindow::generateRandomColor()
{
return QColor::fromRgb(QRandomGenerator::global()->generate());
}
bool MainWindow::eventFilter(QObject *obj, QEvent *event)
{
if (event->type() == QEvent::KeyPress) {
QKeyEvent *ke = static_cast<QKeyEvent *>(event);
if (ke->key() == Qt::Key_V && ke->modifiers().testFlag(Qt::ControlModifier)) {
if (obj == ui->imageLabel) {
setImage(clipboardImage());
return true;
}
}
}
// standard event processing
return QObject::eventFilter(obj, event);
}
void MainWindow::on_pasteHtmlButton_clicked()
{
ui->textEdit->insertHtml(QGuiApplication::clipboard()->mimeData()->html());
}
void MainWindow::on_clearButton_clicked()
{
ui->textEdit_2->clear();
ui->imageLabel->clear();
ui->imageLabel->setText("Paste or drop image here");
}
void MainWindow::dragEnterEvent(QDragEnterEvent* e)
{
e->acceptProposedAction();
}
void MainWindow::dropEvent(QDropEvent* e)
{
QString sizeStr;
ui->textEdit_2->insertPlainText("New Drop has mime formats: " + e->mimeData()->formats().join(", ") + "\n");
QString urlMessage = QString(" Drop contains %1 urls\n").arg(e->mimeData()->urls().count());
ui->textEdit_2->insertPlainText(urlMessage);
foreach (const QUrl &url, e->mimeData()->urls()) {
QString urlStr = url.toDisplayString();
int size = urlStr.length();
sizeStr.setNum(size);
ui->textEdit_2->insertPlainText(" Drop has url data length: " + sizeStr + "\n");
ui->textEdit_2->insertPlainText(urlStr + "\n");
QString fname = url.toLocalFile();
QFileInfo info(fname);
if (info.exists()) { // this is a file
QMimeDatabase db;
QMimeType mt = db.mimeTypeForFile(info);
if (mt.name().contains("image")) {
QImage image = QImage(fname);
setImage(image);
}
}
}
if (e->mimeData()->hasImage()) {
qsizetype imageSize = qvariant_cast<QImage>(e->mimeData()->imageData()).sizeInBytes();
sizeStr.setNum(imageSize);
ui->textEdit_2->insertPlainText(" Drop has Image data length: " + sizeStr + "\n");
QImage image = qvariant_cast<QImage>(e->mimeData()->imageData());
setImage(image);
const QString message = tr("Obtained image from drop, %1x%2, Depth: %3")
.arg(image.width()).arg(image.height()).arg(image.depth());
statusBar()->showMessage(message);
}
if (e->mimeData()->hasHtml()) {
int size = e->mimeData()->html().length();
sizeStr.setNum(size);
ui->textEdit_2->insertPlainText(" Drop has html data length: " + sizeStr + "\n");
ui->textEdit_2->insertPlainText(e->mimeData()->html()+"\n");
ui->textEdit->insertHtml(e->mimeData()->html()+"<br>");
}
if (e->mimeData()->hasText()) {
int size = e->mimeData()->text().length();
sizeStr.setNum(size);
ui->textEdit_2->insertPlainText(" Drop has text data length: " + sizeStr + "\n");
ui->textEdit_2->insertPlainText(e->mimeData()->text());
}
const QString message = tr(" Drop accepted, %1 ")
.arg(e->mimeData()->formats().join(' '));
statusBar()->showMessage(message + sizeStr);
e->acceptProposedAction();
}