From f7a553177d4b969956bc04a0140fce34958971f5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jo=C3=A3o=20Barbosa?= <joao.paulo.barbosa@gmail.com>
Date: Mon, 30 Jul 2018 22:44:18 +0100
Subject: gui: Add GUIUtil::ItemDelegate with keyEscapePressed signal

---
 src/qt/guiutil.cpp | 11 +++++++++++
 src/qt/guiutil.h   | 13 +++++++++++++
 2 files changed, 24 insertions(+)

(limited to 'src')

diff --git a/src/qt/guiutil.cpp b/src/qt/guiutil.cpp
index 9dde2c392c..955f5cdfe3 100644
--- a/src/qt/guiutil.cpp
+++ b/src/qt/guiutil.cpp
@@ -49,6 +49,7 @@
 #include <QDoubleValidator>
 #include <QFileDialog>
 #include <QFont>
+#include <QKeyEvent>
 #include <QLineEdit>
 #include <QSettings>
 #include <QTextDocument> // for Qt::mightBeRichText
@@ -927,4 +928,14 @@ void ClickableProgressBar::mouseReleaseEvent(QMouseEvent *event)
     Q_EMIT clicked(event->pos());
 }
 
+bool ItemDelegate::eventFilter(QObject *object, QEvent *event)
+{
+    if (event->type() == QEvent::KeyPress) {
+        if (static_cast<QKeyEvent*>(event)->key() == Qt::Key_Escape) {
+            Q_EMIT keyEscapePressed();
+        }
+    }
+    return QItemDelegate::eventFilter(object, event);
+}
+
 } // namespace GUIUtil
diff --git a/src/qt/guiutil.h b/src/qt/guiutil.h
index 6aa65369fa..5b32f03aaf 100644
--- a/src/qt/guiutil.h
+++ b/src/qt/guiutil.h
@@ -10,6 +10,7 @@
 
 #include <QEvent>
 #include <QHeaderView>
+#include <QItemDelegate>
 #include <QMessageBox>
 #include <QObject>
 #include <QProgressBar>
@@ -232,6 +233,18 @@ namespace GUIUtil
 
     typedef ClickableProgressBar ProgressBar;
 
+    class ItemDelegate : public QItemDelegate
+    {
+        Q_OBJECT
+    public:
+        ItemDelegate(QObject* parent) : QItemDelegate(parent) {}
+
+    Q_SIGNALS:
+        void keyEscapePressed();
+
+    private:
+        bool eventFilter(QObject *object, QEvent *event);
+    };
 } // namespace GUIUtil
 
 #endif // BITCOIN_QT_GUIUTIL_H
-- 
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