Fixed so Demo windows adapt better to high DPI skin.

-Position and sizes should of course be read as dimensions (dp by default).
-MoveIn and clip windows after getting preferred size.

Demo/demo01/Demo01.cpp

@@ -80,22 +80,32 @@ void DemoWindow::LoadResource(TBNode &node)
 	// Get title from the WindowInfo section (or use "" if not specified)
 	SetText(node.GetValueString("WindowInfo>title", ""));
 
+	const TBRect parent_rect(0, 0, GetParent()->GetRect().w, GetParent()->GetRect().h);
+	const TBDimensionConverter *dc = g_tb_skin->GetDimensionConverter();
+	TBRect window_rect = GetResizeToFitContentRect();
+
 	// Use specified size or adapt to the preferred content size.
 	TBNode *tmp = node.GetNode("WindowInfo>size");
 	if (tmp && tmp->GetValue().GetArrayLength() == 2)
-		SetSize(tmp->GetValue().GetArray()->GetValue(0)->GetInt(),
-				tmp->GetValue().GetArray()->GetValue(1)->GetInt());
-	else
-		ResizeToFitContent();
+	{
+		window_rect.w = dc->GetPxFromString(tmp->GetValue().GetArray()->GetValue(0)->GetString(), window_rect.w);
+		window_rect.h = dc->GetPxFromString(tmp->GetValue().GetArray()->GetValue(1)->GetString(), window_rect.h);
+	}
 
 	// Use the specified position or center in parent.
 	tmp = node.GetNode("WindowInfo>position");
 	if (tmp && tmp->GetValue().GetArrayLength() == 2)
-		SetPosition(TBPoint(tmp->GetValue().GetArray()->GetValue(0)->GetInt(),
-							tmp->GetValue().GetArray()->GetValue(1)->GetInt()));
+	{
+		window_rect.x = dc->GetPxFromString(tmp->GetValue().GetArray()->GetValue(0)->GetString(), window_rect.x);
+		window_rect.y = dc->GetPxFromString(tmp->GetValue().GetArray()->GetValue(1)->GetString(), window_rect.y);
+	}
 	else
-		SetPosition(TBPoint((GetParent()->GetRect().w - GetRect().w) / 2,
-							(GetParent()->GetRect().h - GetRect().h) / 2));
+		window_rect = window_rect.CenterIn(parent_rect);
+
+	// Make sure the window is inside the parent, and not larger.
+	window_rect = window_rect.MoveIn(parent_rect).Clip(parent_rect);
+
+	SetRect(window_rect);
 
 	// Ensure we have focus - now that we've filled the window with possible focusable
 	// widgets. EnsureFocus was automatically called when the window was activated (by