Gui: Store visibility of status labels (quick measure and input hints)

src/Gui/StatusBarLabel.cpp

@@ -0,0 +1,101 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+/****************************************************************************
+ *                                                                          *
+ *   Copyright (c) 2025 Benjamin Nauck <benjamin@nauck.se>                  *
+ *                                                                          *
+ *   This file is part of FreeCAD.                                          *
+ *                                                                          *
+ *   FreeCAD is free software: you can redistribute it and/or modify it     *
+ *   under the terms of the GNU Lesser General Public License as            *
+ *   published by the Free Software Foundation, either version 2.1 of the   *
+ *   License, or (at your option) any later version.                        *
+ *                                                                          *
+ *   FreeCAD is distributed in the hope that it will be useful, but         *
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of             *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU       *
+ *   Lesser General Public License for more details.                        *
+ *                                                                          *
+ *   You should have received a copy of the GNU Lesser General Public       *
+ *   License along with FreeCAD. If not, see                                *
+ *   <https://www.gnu.org/licenses/>.                                       *
+ *                                                                          *
+ ***************************************************************************/
+
+#include <QMenu>
+#include <QClipboard>
+#include <QApplication>
+#include <QStatusBar>
+#include <QAction>
+#include <QContextMenuEvent>
+#include <QHideEvent>
+
+#include "StatusBarLabel.h"
+#include <App/Application.h>
+
+namespace Gui {
+
+StatusBarLabel::StatusBarLabel(QWidget *parent, const std::string& parameterName)
+    : QLabel(parent)
+{
+    if (!parameterName.empty()) {
+        hGrp = App::GetApplication().GetParameterGroupByPath(
+            "User parameter:BaseApp/Preferences/MainWindow");
+
+        // set visibility before storing parameterName to avoid saving it immediately
+        setVisible(hGrp->GetBool(parameterName.c_str(), false));
+
+        // now we can store parameterName
+        this->parameterName = parameterName;
+    }
+}
+
+void StatusBarLabel::contextMenuEvent(QContextMenuEvent *event)
+{
+    QMenu menu(this);
+
+    // Reproduce standard status bar widget menu
+    if (auto *statusBar = qobject_cast<QStatusBar*>(parentWidget())) {
+        for (QObject *child : statusBar->children()) {
+            QWidget *widget = qobject_cast<QWidget*>(child);
+            if (!widget) {
+                continue;
+            }
+            auto title = widget->windowTitle();
+            if (title.isEmpty()) {
+                continue;
+            }
+
+            QAction *action = menu.addAction(title);
+            action->setCheckable(true);
+            action->setChecked(widget->isVisible());
+            QObject::connect(action, &QAction::toggled, widget, &QWidget::setVisible);
+        }
+    }
+
+    if (textInteractionFlags() & Qt::TextSelectableByMouse) {
+        menu.addSeparator(); // ----------
+
+        // Copy + Select All
+        menu.addAction(tr("Copy"), [this]() {
+            QApplication::clipboard()->setText(this->selectedText());
+        });
+        menu.addAction(tr("Select All"), [this]() {
+            this->setSelection(0, this->text().length());
+        });
+    }
+
+    menu.exec(event->globalPos());
+}
+
+void StatusBarLabel::setVisible(bool visible)
+{
+    if (!parameterName.empty() && hGrp) {
+        hGrp->SetBool(parameterName.c_str(), visible);
+    }
+    if (!visible) {
+        clear();  // Clear text
+    }
+    QLabel::setVisible(visible);
+}
+
+} // namespace Gui