fix CLineEdit read-only button

PIValueTreeEdit support PIValueTree::Attribute::toolTip

libs/widgets/clineedit.cpp

@@ -13,7 +13,7 @@ CLineEdit::CLineEdit(QWidget * parent): QLineEdit(parent) {
 	cw->setToolTip(tr("Clear"));
 	cw->hide();
 	cw->installEventFilter(this);
-	connect(this, &QLineEdit::textChanged, this, &CLineEdit::textChangedSlot);
+	connect(this, &QLineEdit::textChanged, this, &CLineEdit::textChangedInternal);
 	int is     = fontHeight(this);
 	QMargins m = textMargins();
 	m.setRight(m.right() + (is * 1.2));
@@ -26,6 +26,20 @@ CLineEdit::~CLineEdit() {
 }
 
 
+void CLineEdit::setReadOnly(bool yes) {
+	QLineEdit::setReadOnly(yes);
+	textChangedInternal();
+}
+
+
+void CLineEdit::clearClick() {
+	if (!isEnabled()) return;
+	setText(dt);
+	emit cleared();
+	emit textEdited(dt);
+}
+
+
 bool CLineEdit::eventFilter(QObject * o, QEvent * e) {
 	switch (e->type()) {
 	case QEvent::MouseButtonRelease: clearMouseRelease(static_cast<QMouseEvent *>(e)); break;
@@ -67,7 +81,7 @@ void CLineEdit::setDefaultText(const QString & t, bool set_text) {
 		cw->hide();
 		return;
 	}
-	textChangedSlot(text());
+	textChangedInternal();
 }
 
 
@@ -78,6 +92,6 @@ void CLineEdit::clearMouseRelease(QMouseEvent * e) {
 }
 
 
-void CLineEdit::textChangedSlot(QString text) {
-	cw->setVisible(text != dt);
+void CLineEdit::textChangedInternal() {
+	cw->setVisible((text() != dt) && !isReadOnly());
 }