Qt Creator Plugin HOWTO documentation first and second cut

Signed-off-by: Abhishek Patil <abhishek.patil@vcreatelogic.com>

Merge-request: 145
Reviewed-by: con <qtc-committer@nokia.com>

doc/examples/htmleditor/htmleditorwidget.cpp

@@ -0,0 +1,82 @@
+#include "htmleditorwidget.h"
+
+#include <QTextEdit>
+#include <QPlainTextEdit>
+#include <QtWebKit>
+#include <QDebug>
+
+struct HTMLEditorWidgetData
+{
+    QWebView* webView;
+    QPlainTextEdit* textEdit;
+    bool modified;
+    QString path;
+};
+
+HTMLEditorWidget::HTMLEditorWidget(QWidget* parent):QTabWidget(parent)
+{
+    d = new HTMLEditorWidgetData;
+
+    d->webView = new QWebView;
+    d->textEdit = new QPlainTextEdit;
+
+    addTab(d->webView, "Preview");
+    addTab(d->textEdit, "Source");
+    setTabPosition(QTabWidget::South);
+    setTabShape(QTabWidget::Triangular);
+
+    d->textEdit->setFont( QFont("Courier", 12) );
+
+    connect(this, SIGNAL(currentChanged(int)),
+            this, SLOT(slotCurrentTabChanged(int)));
+
+    connect(d->textEdit, SIGNAL(textChanged()),
+            this, SLOT(slotContentModified()));
+
+    connect(d->webView, SIGNAL(titleChanged(QString)),
+            this, SIGNAL(titleChanged(QString)));
+
+    d->modified = false;
+}
+
+
+HTMLEditorWidget::~HTMLEditorWidget()
+{
+    delete d;
+}
+
+void HTMLEditorWidget::setContent(const QByteArray& ba, const QString& path)
+{
+    if(path.isEmpty())
+        d->webView->setHtml(ba);
+    else
+        d->webView->setHtml(ba, "file:///" + path);
+    d->textEdit->setPlainText(ba);
+    d->modified = false;
+    d->path = path;
+}
+
+QByteArray HTMLEditorWidget::content() const
+{
+    QString HTMLText = d->textEdit->toPlainText();
+    return HTMLText.toAscii();
+}
+
+QString HTMLEditorWidget::title() const
+{
+    return d->webView->title();
+}
+
+void HTMLEditorWidget::slotCurrentTabChanged(int tab)
+{
+    if(tab == 0 && d->modified)
+        setContent( content(), d->path );
+}
+
+void HTMLEditorWidget::slotContentModified()
+{
+    d->modified = true;
+    emit contentModified();
+}
+
+