Adding ./doc from boost

Reviewer: Lauro Moura <lauro.neto@openbossa.org>
          Luciano Wolf <luciano.wolf@openbossa.org>

doc/codesnippets/doc/src/snippets/widgetdelegate.cpp

@@ -0,0 +1,23 @@
+
+//![0]
+class WidgetDelegate (QStyledItemDelegate):
+    # ...
+
+    def paint(painter, option, index):
+        if index.column() == 1:
+            progress = index.data().toInt()
+
+            progressBarOption = QStyleOptionProgressBar()
+            progressBarOption.rect = option.rect
+            progressBarOption.minimum = 0
+            progressBarOption.maximum = 100
+            progressBarOption.progress = progress
+            progressBarOption.text = QString::number(progress) + "%"
+            progressBarOption.textVisible = True
+
+            QApplication.style().drawControl(QStyle.CE_ProgressBar, progressBarOption, painter)
+        else:
+            QStyledItemDelegate.paint(self, painter, option, index)
+
+//![0]
+