Gui: [skip ci] add slot to update editor related commands

src/Gui/MainWindow.cpp

@@ -347,6 +347,10 @@ MainWindow::MainWindow(QWidget * parent, Qt::WindowFlags f)
     d->activityTimer->setSingleShot(false);
     d->activityTimer->start(150);
 
+    // update view-sensitive commands when clipboard has changed
+    QClipboard *clipbd = QApplication::clipboard();
+    connect(clipbd, SIGNAL(dataChanged()), this, SLOT(updateEditorActions()));
+
     // show main window timer
     d->visibleTimer = new QTimer(this);
     d->visibleTimer->setObjectName(QString::fromLatin1("visibleTimer"));
@@ -1336,6 +1340,27 @@ void MainWindow::_updateActions()
     d->actionUpdateDelay = 0;
 }
 
+void MainWindow::updateEditorActions()
+{
+    Command* cmd = nullptr;
+    CommandManager& mgr = Application::Instance->commandManager();
+
+    cmd = mgr.getCommandByName("Std_Cut");
+    if (cmd) cmd->testActive();
+
+    cmd = mgr.getCommandByName("Std_Copy");
+    if (cmd) cmd->testActive();
+
+    cmd = mgr.getCommandByName("Std_Paste");
+    if (cmd) cmd->testActive();
+
+    cmd = mgr.getCommandByName("Std_Undo");
+    if (cmd) cmd->testActive();
+
+    cmd = mgr.getCommandByName("Std_Redo");
+    if (cmd) cmd->testActive();
+}
+
 void MainWindow::switchToTopLevelMode()
 {
     QList<QDockWidget*> dw = this->findChildren<QDockWidget*>();

src/Gui/MainWindow.h

@@ -185,6 +185,10 @@ public:
 
 
 public Q_SLOTS:
+    /**
+     * Updates the standard actions of a text editor such as Cut, Copy, Paste, Undo and Redo.
+     */
+    void updateEditorActions();
     /**
      * Sets text to the pane in the status bar.
      */