completer hide when window lost focus

libs/widgets/qcodeedit.cpp

@@ -10,6 +10,9 @@
 #include <QAction>
 #include <QApplication>
 #include <QHeaderView>
+#if QT_VERSION >= QT_VERSION_CHECK(5, 0, 0)
+#  include <QWindow>
+#endif
 #include "ecombobox.h"
 #include "qad_types.h"
 #include "ui_qcodeedit.h"
@@ -130,6 +133,9 @@ QCodeEdit::QCodeEdit(QWidget * parent): QWidget(parent) {
 	connect(ui->textCode, SIGNAL(selectionChanged()), this, SLOT(textEdit_selectionChanged()));
 	connect(ui->comboSearch->lineEdit(), SIGNAL(returnPressed()), this, SLOT(searchNext()));
 	connect(ui->comboReplace->lineEdit(), SIGNAL(returnPressed()), this, SLOT(on_buttonReplaceSearch_clicked()));
+#if QT_VERSION >= QT_VERSION_CHECK(5, 0, 0)
+	connect(qApp, &QGuiApplication::focusWindowChanged, this, [this](QWindow*w){if (w == 0) {hideHelp(); completer->hide();}});
+#endif
 	updateLines();
 	
 	registerAutoCompletitionClass(-1, QCodeEdit::Keyword, "Words", QIcon(":/icons/code-word.png"));