Make QSearchField behaves like other QWidget on Mac by sending Qt eve…

…nts instead of only widget specific signals

gallery.cpp

@@ -1,5 +1,7 @@
 #include "gallery.h"
 
+#include <QKeyEvent>
+#include <QMessageBox>
 #include <QVBoxLayout>
 
 #include "qsearchfield.h"
@@ -11,8 +13,9 @@ Gallery::Gallery(QWidget *parent) : QWidget(parent)
     setWindowTitle("Qocoa Gallery");
     QVBoxLayout *layout = new QVBoxLayout(this);
 
-    QSearchField *searchField = new QSearchField(this);
+    searchField = new QSearchField(this);
     layout->addWidget(searchField);
+    searchField->installEventFilter(this);
 
     QSearchField *searchFieldPlaceholder = new QSearchField(this);
     searchFieldPlaceholder->setPlaceholderText("Placeholder text");
@@ -73,3 +76,20 @@ Gallery::Gallery(QWidget *parent) : QWidget(parent)
     progressIndicatorSpinning->animate();
     layout->addWidget(progressIndicatorSpinning);
 }
+
+bool Gallery::eventFilter(QObject *watched, QEvent *event)
+{
+    if (watched == searchField) {
+        if (event->type() == QEvent::KeyPress) {
+            QKeyEvent* e = static_cast<QKeyEvent*>(event);
+            switch (e->key()) {
+                case Qt::Key_Return:
+                    QMessageBox::information(this, "Key event received",
+                        "Key event \"" + QKeySequence(e->key()).toString() +
+                        "\" received on searchField");
+                return true;
+            }
+        }
+    }
+    return QWidget::eventFilter(watched, event);
+}

gallery.h

@@ -3,12 +3,18 @@
 
 #include <QWidget>
 
+class QSearchField;
+
 class Gallery : public QWidget
 {
     Q_OBJECT
 
 public:
     explicit Gallery(QWidget *parent = 0);
+protected:
+    bool eventFilter(QObject *watched, QEvent *event) override;
+private:
+    QSearchField *searchField;
 };
 
 #endif // WIDGET_H

qsearchfield_mac.mm

@@ -29,6 +29,7 @@ of this software and associated documentation files (the "Software"), to deal
 #import "AppKit/NSSearchField.h"
 
 #include <QApplication>
+#include <QKeyEvent>
 #include <QClipboard>
 
 class QSearchFieldPrivate : public QObject
@@ -51,8 +52,11 @@ void textDidEndEditing()
 
     void returnPressed()
     {
-        if (qSearchField)
+        if (qSearchField) {
             emit qSearchField->returnPressed();
+            QKeyEvent* event = new QKeyEvent(QEvent::KeyPress, Qt::Key_Return, Qt::NoModifier);
+            QApplication::postEvent(qSearchField, event);
+        }
     }
 
     QPointer<QSearchField> qSearchField;