1 files changed, 59 insertions, 0 deletions
diff --git a/Swift/QtUI/QtClosableLineEdit.cpp b/Swift/QtUI/QtClosableLineEdit.cpp
new file mode 100644
index 0000000..512194b
--- /dev/null
+++ b/Swift/QtUI/QtClosableLineEdit.cpp
@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2014 Kevin Smith and Remko Tronçon
+ * Licensed under the GNU General Public License v3.
+ * See Documentation/Licenses/GPLv3.txt for more information.
+ */
+
+/* Contains demo Trolltech code from http://git.forwardbias.in/?p=lineeditclearbutton.git with license: */
+/****************************************************************************
+**
+** Copyright (c) 2007 Trolltech ASA <info@trolltech.com>
+**
+** Use, modification and distribution is allowed without limitation,
+** warranty, liability or support of any kind.
+**
+****************************************************************************/
+
+#include <Swift/QtUI/QtClosableLineEdit.h>
+#include <QApplication>
+#include <QToolButton>
+#include <QStyle>
+#include <QKeyEvent>
+
+namespace Swift {
+
+const int QtClosableLineEdit::clearButtonPadding = 2;
+
+QtClosableLineEdit::QtClosableLineEdit(QWidget *parent) : QLineEdit(parent) {
+	clearButton = new QToolButton(this);
+	clearButton->setIcon(style()->standardIcon(QStyle::SP_TitleBarCloseButton));
+	clearButton->setIconSize(QSize(16,16));
+	clearButton->setCursor(Qt::ArrowCursor);
+	clearButton->setStyleSheet("QToolButton { border: none; padding: 0px; }");
+	clearButton->hide();
+	connect(clearButton, SIGNAL(clicked()), this, SLOT(handleCloseButtonClicked()));
+	connect(this, SIGNAL(textChanged(const QString&)), this, SLOT(updateCloseButton(const QString&)));
+	int frameWidth = style()->pixelMetric(QStyle::PM_DefaultFrameWidth);
+	setStyleSheet(QString("QLineEdit { padding-right: %1px; } ").arg(clearButton->sizeHint().width() + frameWidth + 1));
+	QSize minimumSize = minimumSizeHint();
+	setMinimumSize(qMax(minimumSize.width(), clearButton->sizeHint().width() + frameWidth * 2 + clearButtonPadding),
+								qMax(minimumSize.height(), clearButton->sizeHint().height() + frameWidth * 2 + clearButtonPadding));
+}
+
+void QtClosableLineEdit::resizeEvent(QResizeEvent *) {
+	QSize size = clearButton->sizeHint();
+	int frameWidth = style()->pixelMetric(QStyle::PM_DefaultFrameWidth);
+	clearButton->move(rect().right() - frameWidth - size.width(), (rect().bottom() + 1 - size.height())/2);
+}
+
+void QtClosableLineEdit::updateCloseButton(const QString& text) {
+	clearButton->setVisible(!text.isEmpty());
+}
+
+void QtClosableLineEdit::handleCloseButtonClicked() {
+	clear();
+	QApplication::postEvent(this, new QKeyEvent(QEvent::KeyPress, Qt::Key_Escape, Qt::NoModifier));
+	QApplication::postEvent(this, new QKeyEvent(QEvent::KeyRelease, Qt::Key_Escape, Qt::NoModifier));
+}
+
+}