All messages from selected feeds can be removed now.

src/core/messagesmodel.cpp

@@ -325,9 +325,6 @@ bool MessagesModel::switchBatchMessageImportance(const QModelIndexList &messages
     query_delete_msg.bindValue(":id", message_id);
     query_delete_msg.bindValue(":important",
                                importance == 1 ? 0 : 1);
-
-    // TODO: dat u vsech funkci ty execy do ifu a kdyz
-    // vratijou false tak udela rollback a vratit funkci s hodnotou false.
     query_delete_msg.exec();
   }
 
@@ -373,6 +370,8 @@ bool MessagesModel::setBatchMessagesDeleted(const QModelIndexList &messages, int
     // FULLY reload the model if underlying data is changed.
     select();
     fetchAll();
+
+    emit feedCountsChanged();
     return true;
   }
   else {
@@ -424,7 +423,41 @@ bool MessagesModel::switchAllMessageImportance() {
 }
 
 bool MessagesModel::setAllMessagesDeleted(int deleted) {
+  QSqlDatabase db_handle = database();
+
+  if (!db_handle.transaction()) {
+    qWarning("Starting transaction for all message deletion.");
     return false;
+  }
+
+  QSqlQuery query_delete_msg(db_handle);
+  if (!query_delete_msg.prepare(QString("UPDATE messages SET deleted = :deleted "
+                                      "WHERE feed IN (%1) AND deleted = 0").arg(textualFeeds().join(", ")))) {
+    qWarning("Query preparation failed for message deletion.");
+
+    db_handle.rollback();
+    return false;
+  }
+
+  query_delete_msg.bindValue(":deleted", deleted);
+
+  if (!query_delete_msg.exec()) {
+    qDebug("Query execution for all message deletion failed.");
+    db_handle.rollback();
+  }
+
+  // Commit changes.
+  if (db_handle.commit()) {
+    // FULLY reload the model if underlying data is changed.
+    select();
+    fetchAll();
+
+    emit feedCountsChanged();
+    return true;
+  }
+  else {
+    return db_handle.rollback();
+  }
 }
 
 bool MessagesModel::setAllMessagesRead(int read) {

src/core/messagesmodel.h

@@ -20,7 +20,6 @@ class Message {
     QDateTime m_updated;
 };
 
-
 class MessagesModel : public QSqlTableModel {
     Q_OBJECT
 

src/gui/feedmessageviewer.cpp

@@ -62,6 +62,8 @@ void FeedMessageViewer::createConnections() {
           SIGNAL(triggered()), m_messagesView, SLOT(openSelectedMessagesInternally()));
   connect(FormMain::getInstance()->m_ui->m_actionMarkAllMessagesAsRead,
           SIGNAL(triggered()), m_messagesView, SLOT(setAllMessagesRead()));
+  connect(FormMain::getInstance()->m_ui->m_actionDeleteAllMessages,
+          SIGNAL(triggered()), m_messagesView, SLOT(setAllMessagesDeleted()));
 }
 
 void FeedMessageViewer::initialize() {

src/gui/messagesview.cpp

@@ -338,6 +338,18 @@ void MessagesView::setAllMessagesUnread() {
   setAllMessagesReadStatus(0);
 }
 
+void MessagesView::setAllMessagesDeleteStatus(int deleted) {
+  m_sourceModel->setAllMessagesDeleted(deleted);
+
+  // We deleted completely each and every visible message.
+  // That is why no message can be displayed now.
+  emit currentMessageRemoved();
+}
+
+void MessagesView::setAllMessagesDeleted() {
+  setAllMessagesDeleteStatus(1);
+}
+
 void MessagesView::reselectIndexes(const QModelIndexList &indexes) {
   selectionModel()->clearSelection();
 

src/gui/messagesview.h

@@ -40,6 +40,9 @@ class MessagesView : public QTreeView {
     void setAllMessagesRead();
     void setAllMessagesUnread();
 
+    void setAllMessagesDeleteStatus(int deleted);
+    void setAllMessagesDeleted();
+
   protected slots:
     // Marks given indexes as selected.
     void reselectIndexes(const QModelIndexList &indexes);