Accept file drops inside the Group files window

tools/chatgui/src/member_files/browser.cpp

@@ -24,6 +24,8 @@
 #include <QPointer>
 #include <QRunnable>
 #include <QLocale>
+#include <QDropEvent>
+#include <QMimeData>
 #include <limits>
 #include <cstring>
 extern "C" {
@@ -75,6 +77,13 @@ MemberFileBrowser::MemberFileBrowser(DbManager* db, QWidget* parent) : QDialog(p
     m_uploadStatus = new QLabel(this); m_uploadStatus->setObjectName("memberFilesUploadStatus");
     m_uploadStatus->setWordWrap(true); layout->addWidget(m_uploadStatus);
     m_progress = new QProgressBar(this); m_progress->setRange(0, 1000); m_progress->hide(); layout->addWidget(m_progress);
+    auto dropTargets = findChildren<QWidget*>(); dropTargets.append(this);
+    for (auto* target : dropTargets) { target->setAcceptDrops(true); target->installEventFilter(this); }
+    m_dropHint = new QLabel(m_entries->viewport()); m_dropHint->setObjectName("memberFilesDropHint");
+    m_dropHint->setAttribute(Qt::WA_TransparentForMouseEvents); m_dropHint->setAlignment(Qt::AlignCenter);
+    m_dropHint->setStyleSheet("QLabel { border: 2px dashed palette(highlight); background: palette(window); color: palette(text); }");
+    m_dropHint->setText(text("Copy to my files")); m_dropHint->hide();
+    DEBUG_DEBUG(DEBUG_CATEGORY_DEBUG, "file browser: drop targets installed count=%d", int(dropTargets.size()));
     connect(reload, &QPushButton::clicked, this, [this]() { m_staleRetries = 0; refresh(); });
     connect(up, &QPushButton::clicked, this, [this]() {
         if (m_path.isEmpty()) { m_owners->setCurrentIndex(0); return; }
@@ -113,8 +122,45 @@ MemberFileBrowser::~MemberFileBrowser() {
     m_uploadPool.waitForDone();
 }
 
+bool MemberFileBrowser::eventFilter(QObject* target, QEvent* event) {
+    if (event->type() == QEvent::DragLeave) { m_dropHint->hide(); return true; }
+    if (event->type() != QEvent::DragEnter && event->type() != QEvent::DragMove && event->type() != QEvent::Drop)
+        return QDialog::eventFilter(target, event);
+    auto* drop = static_cast<QDropEvent*>(event);
+    QString reason;
+    if (m_dropId || m_uploadBatchId || m_transferId) reason = text("Finish or cancel the current transfer first");
+    else if (!m_group || !server() || !m_db || !owner() || owner() != m_db->myNodeId() || !gui_bridge_is_uasync_ready())
+        reason = text("Upload unavailable");
+    else if (!drop->mimeData()->hasUrls() || drop->mimeData()->urls().isEmpty() || !(drop->possibleActions() & Qt::CopyAction))
+        reason = text("Drop local files to copy");
+    QStringList paths;
+    if (reason.isEmpty()) for (const auto& url : drop->mimeData()->urls()) {
+        if (!url.isLocalFile() || url.toLocalFile().isEmpty()) { reason = text("Only local files can be uploaded"); break; }
+        paths.append(url.toLocalFile());
+    }
+    if (!reason.isEmpty()) {
+        if (event->type() != QEvent::DragMove)
+            DEBUG_WARN(DEBUG_CATEGORY_MEDIA, "file browser: drop rejected group=%llu owner=%llu path=%s reason=%s",
+                (unsigned long long)m_group, (unsigned long long)owner(), qPrintable(m_path), qPrintable(reason));
+        m_status->setText(reason); m_dropHint->hide(); drop->ignore(); return true;
+    }
+    drop->setDropAction(Qt::CopyAction); drop->accept();
+    if (event->type() != QEvent::Drop) {
+        m_dropHint->setGeometry(m_entries->viewport()->rect()); m_dropHint->show(); m_dropHint->raise(); return true;
+    }
+    m_dropHint->hide(); m_dropId = requestId(); updateActions();
+    DEBUG_INFO(DEBUG_CATEGORY_MEDIA, "file browser: drop accepted group=%llu server=%llu owner=%llu path=%s files=%d",
+        (unsigned long long)m_group, (unsigned long long)server(), (unsigned long long)owner(), qPrintable(m_path), int(paths.size()));
+    quint64 id = m_dropId;
+    QTimer::singleShot(0, this, [this, id, paths] {
+        if (m_dropId != id) return;
+        m_dropId = 0; updateActions(); beginUploads(paths, false);
+    });
+    return true;
+}
+
 void MemberFileBrowser::setChannel(const QString& channel, quint64 selectedOwner) {
-    if (m_uploadBatchId || m_transferId) {
+    if (m_dropId || m_uploadBatchId || m_transferId) {
         DEBUG_WARN(DEBUG_CATEGORY_MEDIA, "file browser: context change blocked during transfer channel=%s", qPrintable(channel));
         m_status->setText(text("Finish or cancel the current transfer first")); return;
     }
@@ -157,7 +203,7 @@ void MemberFileBrowser::updateActions() {
     auto* item = m_entries->currentItem(); bool own = owner() && owner() == m_db->myNodeId();
     bool available = server() && gui_bridge_is_uasync_ready();
     bool file = item && item->data(0, Qt::UserRole + 1).toInt() == MF_FILE;
-    bool busy = m_uploadBatchId || m_transferId;
+    bool busy = m_dropId || m_uploadBatchId || m_transferId;
     m_servers->setEnabled(!busy); m_owners->setEnabled(!busy); m_navigation->setEnabled(!busy); m_entries->setEnabled(!busy);
     m_upload->setEnabled(available && own && !busy); m_mkdir->setEnabled(available && own && !busy);
     m_rename->setEnabled(available && own && item && !busy); m_remove->setEnabled(available && own && item && !busy);
@@ -368,7 +414,7 @@ void MemberFileBrowser::upload() {
 }
 
 void MemberFileBrowser::uploadOwnFiles(const QString& channel, const QStringList& paths) {
-    if (m_uploadBatchId || m_transferId) {
+    if (m_dropId || m_uploadBatchId || m_transferId) {
         DEBUG_WARN(DEBUG_CATEGORY_MEDIA, "file browser: drop rejected while busy files=%d", int(paths.size()));
         QMessageBox::warning(this, text("Group files"), text("Finish or cancel the current transfer first")); return;
     }
@@ -383,10 +429,10 @@ void MemberFileBrowser::uploadOwnFiles(const QString& channel, const QStringList
 // Сервер выбирается до первого запроса; batch ID защищает вложенные циклы диалогов от отмены/закрытия окна.
 void MemberFileBrowser::beginUploads(const QStringList& paths, bool chooseServer) {
     if (paths.isEmpty()) return;
-    if (m_uploadBatchId || m_transferId || !server() || !owner() || owner() != m_db->myNodeId() || !gui_bridge_is_uasync_ready()) {
+    if (m_dropId || m_uploadBatchId || m_transferId || !server() || !owner() || owner() != m_db->myNodeId() || !gui_bridge_is_uasync_ready()) {
         DEBUG_WARN(DEBUG_CATEGORY_MEDIA, "file browser: upload unavailable group=%llu server=%llu owner=%llu busy=%d ready=%d",
             (unsigned long long)m_group, (unsigned long long)server(), (unsigned long long)owner(),
-            bool(m_uploadBatchId || m_transferId), gui_bridge_is_uasync_ready());
+            bool(m_dropId || m_uploadBatchId || m_transferId), gui_bridge_is_uasync_ready());
         QMessageBox::warning(this, text("Group files"), !server() ? text("No media server in this group") : text("Upload unavailable"));
         return;
     }
@@ -533,6 +579,7 @@ void MemberFileBrowser::mutate(uint8_t command) {
 }
 
 void MemberFileBrowser::cancel() {
+    if (m_dropId) { m_dropId = 0; m_uploadStatus->setText(text("Upload queue cancelled")); updateActions(); }
     if (m_uploadBatchId) finishUploads(text("Upload queue cancelled"));
     cancelRequest(m_transferId);
 }

tools/chatgui/src/member_files/browser.h

@@ -28,6 +28,8 @@ public:
     void uploadOwnFiles(const QString& channel, const QStringList& paths);
     void onResponse(const uint8_t* data, int length);
     void onTransfer(const uint8_t* data, int length);
+protected:
+    bool eventFilter(QObject* target, QEvent* event) override;
 private:
     void refresh();
     void requestQuota();
@@ -55,6 +57,7 @@ private:
     QString m_path, m_local;
     bool m_openAfter = false;
     quint64 m_uploadBatchId = 0, m_uploadStatId = 0;
+    quint64 m_dropId = 0;
     QStringList m_uploadQueue;
     QThreadPool m_uploadPool;
     int m_uploadDone = 0, m_uploadSkipped = 0, m_uploadTotal = 0;
@@ -68,6 +71,7 @@ private:
     QPushButton *m_upload, *m_download, *m_mkdir, *m_rename, *m_remove, *m_cancel;
     QLabel* m_status;
     QLabel* m_uploadStatus;
+    QLabel* m_dropHint;
     QLabel* m_quota;
     QProgressBar* m_progress;
 };