From cbf7dff87e6f4c8aab8aac8aee447e08667cba46 Mon Sep 17 00:00:00 2001
From: Tobias Koenig <tobias.koenig@kdab.com>
Date: Fri, 19 Oct 2012 18:13:11 +0200
Subject: [PATCH] Show how to extend the Qt widgets with custom properties

---
 declarativeobjects.cpp |    4 ++--
 declarativeobjects_p.h |    5 +++--
 declarativewidgets.pro |   14 ++++++++++++--
 editor.qml             |    2 +-
 objectadaptors.cpp     |   12 ++++++++++++
 objectadaptors_p.h     |   22 ++++++++++++++++++++++
 6 files changed, 52 insertions(+), 7 deletions(-)
 create mode 100644 objectadaptors.cpp
 create mode 100644 objectadaptors_p.h

diff --git a/declarativeobjects.cpp b/declarativeobjects.cpp
index 051006b..d38dfa8 100644
--- a/declarativeobjects.cpp
+++ b/declarativeobjects.cpp
@@ -930,12 +930,12 @@ DeclarativeTabWidgetAttached *DeclarativeTabWidget::qmlAttachedProperties(QObjec
 CUSTOM_METAOBJECT(DeclarativeTabWidget, QTabWidget)
 
 // DeclarativeTextEdit
-DeclarativeTextEdit::DeclarativeTextEdit(QObject *parent) : DeclarativeWidgetProxy<QTextEdit>(parent)
+DeclarativeTextEdit::DeclarativeTextEdit(QObject *parent) : DeclarativeWidgetProxy<TextEdit>(parent)
 {
   connectAllSignals(m_proxiedObject, this);
 }
 
-CUSTOM_METAOBJECT(DeclarativeTextEdit, QTextEdit)
+CUSTOM_METAOBJECT(DeclarativeTextEdit, TextEdit)
 
 // DeclarativeToolBar
 DeclarativeToolBar::DeclarativeToolBar(QObject *parent) : DeclarativeWidgetProxy<QToolBar>(parent)
diff --git a/declarativeobjects_p.h b/declarativeobjects_p.h
index 76bfef1..f4de211 100644
--- a/declarativeobjects_p.h
+++ b/declarativeobjects_p.h
@@ -1,6 +1,8 @@
 #ifndef DECLARATIVEOBJECTS_H
 #define DECLARATIVEOBJECTS_H
 
+#include "objectadaptors_p.h"
+
 #include <QtCore/QObject>
 #include <QtCore/QPointer>
 #include <QtGui/QAction>
@@ -16,7 +18,6 @@
 #include <QtGui/QSlider>
 #include <QtGui/QStatusBar>
 #include <QtGui/QTabWidget>
-#include <QtGui/QTextEdit>
 #include <QtGui/QToolBar>
 #include <QtGui/QVBoxLayout>
 #include <QtDeclarative/QDeclarativeListProperty>
@@ -535,7 +536,7 @@ class DeclarativeTabWidget : public DeclarativeWidgetProxy<QTabWidget>
 
 QML_DECLARE_TYPEINFO(DeclarativeTabWidget, QML_HAS_ATTACHED_PROPERTIES)
 
-class DeclarativeTextEdit : public DeclarativeWidgetProxy<QTextEdit>
+class DeclarativeTextEdit : public DeclarativeWidgetProxy<TextEdit>
 {
   DECLARATIVE_OBJECT
 
diff --git a/declarativewidgets.pro b/declarativewidgets.pro
index 0a82893..4d13136 100644
--- a/declarativewidgets.pro
+++ b/declarativewidgets.pro
@@ -8,8 +8,18 @@ DEPENDPATH += .
 INCLUDEPATH += .
 
 # Input
-HEADERS += declarativeobjects_p.h declarativewidgetdocument.h qmetaobjectbuilder_p.h
-SOURCES += declarativeobjects.cpp declarativewidgetdocument.cpp main.cpp qmetaobjectbuilder.cpp
+HEADERS += \
+    declarativeobjects_p.h \
+    declarativewidgetdocument.h \
+    objectadaptors_p.h \
+    qmetaobjectbuilder_p.h
+
+SOURCES += \
+    declarativeobjects.cpp \
+    declarativewidgetdocument.cpp \
+    main.cpp \
+    objectadaptors.cpp \
+    qmetaobjectbuilder.cpp
 
 QT += declarative
 
diff --git a/editor.qml b/editor.qml
index 53a5379..efd35e0 100644
--- a/editor.qml
+++ b/editor.qml
@@ -1,7 +1,7 @@
 import QtGui 1.0
 
 MainWindow {
-  windowTitle: qsTr("Declarative Widget Editor")
+  windowTitle: textEdit.modified ? qsTr("Declarative Widget Editor *modified*") : qsTr("Declarative Widget Editor")
 
   size: Qt.size(500, 300)
 
diff --git a/objectadaptors.cpp b/objectadaptors.cpp
new file mode 100644
index 0000000..ca7bc0c
--- /dev/null
+++ b/objectadaptors.cpp
@@ -0,0 +1,12 @@
+#include "objectadaptors_p.h"
+
+TextEdit::TextEdit(QWidget *parent)
+  : QTextEdit(parent)
+{
+  connect(document(), SIGNAL(modificationChanged(bool)), this, SIGNAL(modifiedChanged()));
+}
+
+bool TextEdit::modified() const
+{
+  return document()->isModified();
+}
diff --git a/objectadaptors_p.h b/objectadaptors_p.h
new file mode 100644
index 0000000..c485ce8
--- /dev/null
+++ b/objectadaptors_p.h
@@ -0,0 +1,22 @@
+#ifndef OBJECTADAPTORS_P_H
+#define OBJECTADAPTORS_P_H
+
+#include <QtGui/QTextEdit>
+
+class TextEdit : public QTextEdit
+{
+  Q_OBJECT
+
+  Q_PROPERTY(bool modified READ modified NOTIFY modifiedChanged)
+
+  public:
+    TextEdit(QWidget *parent = 0);
+
+  Q_SIGNALS:
+    void modifiedChanged();
+
+  private:
+    bool modified() const;
+};
+
+#endif
-- 
1.7.2.5