Scriptable application: Add a status label displaying the line number

It is useful to fix errors when playing around.

Pick-to: 6.8
Change-Id: I7a656914ae30f59a5eeb1c384dc18e44389a61c5
Reviewed-by: Christian Tismer <[email protected]>

2 files changed, 17 insertions, 0 deletions

diff --git a/examples/scriptableapplication/mainwindow.cpp b/examples/scriptableapplication/mainwindow.cpp
index ece7989e7..5dc6fd7f0 100644
--- a/examples/scriptableapplication/mainwindow.cpp
+++ b/examples/scriptableapplication/mainwindow.cpp
@@ -5,6 +5,7 @@
 #include "pythonutils.h"
 
 #include <QtWidgets/QApplication>
+#include <QtWidgets/QLabel>
 #include <QtWidgets/QMenu>
 #include <QtWidgets/QMenuBar>
 #include <QtWidgets/QPlainTextEdit>
@@ -15,6 +16,7 @@
 #include <QtGui/QAction>
 #include <QtGui/QFontDatabase>
 #include <QtGui/QIcon>
+#include <QtGui/QTextCursor>
 
 #include <QtCore/QDebug>
 #include <QtCore/QTextStream>
@@ -69,6 +71,11 @@ MainWindow::MainWindow()
     m_scriptEdit->setFont(QFontDatabase::systemFont(QFontDatabase::FixedFont));
     setCentralWidget(m_scriptEdit);
 
+    m_lineNumberLabel = new QLabel;
+    statusBar()->addPermanentWidget(m_lineNumberLabel, 0);
+    connect(m_scriptEdit, &QPlainTextEdit::cursorPositionChanged,
+            this, &MainWindow::slotCursorChanged);
+
     if (!PythonUtils::bindAppObject("__main__"_L1, "mainWindow"_L1,
                                     PythonUtils::MainWindowType, this)) {
        statusBar()->showMessage(tr("Error loading the application module"));
@@ -105,3 +112,10 @@ void MainWindow::testFunction1()
     qDebug().noquote() << message;
     statusBar()->showMessage(message);
 }
+
+void MainWindow::slotCursorChanged()
+{
+    auto cursor = m_scriptEdit->textCursor();
+    const int line = cursor.blockNumber() + 1;
+    m_lineNumberLabel->setText("Line: "_L1 + QString::number(line));
+}
diff --git a/examples/scriptableapplication/mainwindow.h b/examples/scriptableapplication/mainwindow.h
index e72f5ca72..98af12eb5 100644
--- a/examples/scriptableapplication/mainwindow.h
+++ b/examples/scriptableapplication/mainwindow.h
@@ -6,6 +6,7 @@
 
 #include <QtWidgets/QMainWindow>
 
+QT_FORWARD_DECLARE_CLASS(QLabel)
 QT_FORWARD_DECLARE_CLASS(QPlainTextEdit)
 
 class MainWindow : public QMainWindow
@@ -19,6 +20,7 @@ public:
     static constexpr auto TEST = QLatin1StringView("test");
 
 private Q_SLOTS:
+    void slotCursorChanged();
     void slotRunScript();
     void slotPrintDiagnostics();
 
@@ -26,6 +28,7 @@ private:
     void runScript(const QString &);
 
     QPlainTextEdit *m_scriptEdit;
+    QLabel *m_lineNumberLabel;
 };
 
 #endif // MAINWINDOW_H