C++ Element::AppendChild方法代码示例

// Set the specifed tab index's title element.
void ElementTabSet::SetTab(int tab_index, Core::Element* element)
{
	Core::Element* tabs = GetChildByTag("tabs");
	if (tab_index >= 0 &&
		tab_index < tabs->GetNumChildren())
		tabs->ReplaceChild(GetChild(tab_index), element);
	else
		tabs->AppendChild(element);
}

Core::Element* XMLNodeHandlerDataGrid::ElementStart(Core::XMLParser* parser, const Rocket::Core::String& name, const Rocket::Core::XMLAttributes& attributes)
{
	Core::Element* element = NULL;
	Core::Element* parent = parser->GetParseFrame()->element;

	ROCKET_ASSERT(name == "datagrid" ||
			   name == "col");

	if (name == "datagrid")
	{
		// Attempt to instance the grid.
		element = Core::Factory::InstanceElement(parent, name, name, attributes);
		ElementDataGrid* grid = dynamic_cast< ElementDataGrid* >(element);
		if (grid == NULL)
		{
			if (element != NULL)
				element->RemoveReference();

			Core::Log::Message(Rocket::Core::Log::LT_ERROR, "Instancer failed to create data grid for tag %s.", name.CString());
			return NULL;
		}

		// Set the data source and table on the data grid.
		Rocket::Core::String data_source = attributes.Get< Rocket::Core::String >("source", "");
		grid->SetDataSource(data_source);

		parent->AppendChild(grid);
		grid->RemoveReference();

		// Switch to this handler for all columns.
		parser->PushHandler("datagrid");
	}
	else if (name == "col")
	{
		// Make a new node handler to handle the header elements.		
		element = Core::Factory::InstanceElement(parent, "datagridcolumn", "datagridcolumn", attributes);
		if (element == NULL)
			return NULL;

		ElementDataGrid* grid = dynamic_cast< ElementDataGrid* >(parent);
		if (grid != NULL)
		{
			grid->AddColumn(attributes.Get< Rocket::Core::String >("fields", ""), attributes.Get< Rocket::Core::String >("formatter", ""), attributes.Get< float >("width", 0), element);
			element->RemoveReference();
		}

		// Switch to element handler for all children.
		parser->PushDefaultHandler();
	}
	else
	{
		ROCKET_ERROR;
	}

	return element;
}

// Set the specified tab index's body element.
void ElementTabSet::SetPanel(int tab_index, Core::Element* element)
{
	// Append the window
	Core::Element* windows = GetChildByTag("panels");
	if (tab_index >= 0 &&
		tab_index < windows->GetNumChildren())
		windows->ReplaceChild(GetChild(tab_index), element);
	else
		windows->AppendChild(element);
}

Core::Element* XMLNodeHandlerTabSet::ElementStart(Core::XMLParser* parser, const Rocket::Core::String& name, const Rocket::Core::XMLAttributes& attributes)
{
	ROCKET_ASSERT(name == "tabset" ||
			   name == "tabs" ||
			   name == "tab" ||
			   name == "panels" ||
			   name == "panel");

	if (name == "tabset")
	{
		// Call this node handler for all children
		parser->PushHandler("tabset");

		// Attempt to instance the tabset
		Core::Element* element = Core::Factory::InstanceElement(parser->GetParseFrame()->element, name, name, attributes);		
		ElementTabSet* tabset = rocket_dynamic_cast< ElementTabSet* >(element);
		if (!tabset)
		{
			if (element)
				element->RemoveReference();
			Core::Log::Message(Rocket::Core::Log::LT_ERROR, "Instancer failed to create element for tag %s.", name.CString());
			return NULL;
		}

		// Add the TabSet into the document
		parser->GetParseFrame()->element->AppendChild(element);
		element->RemoveReference();

		return element;
	}	
	else if (name == "tab")
	{
		// Call default element handler for all children.
		parser->PushDefaultHandler();

		Core::Element* tab_element = Core::Factory::InstanceElement(parser->GetParseFrame()->element, "*", "tab", attributes);

		ElementTabSet* tabset = rocket_dynamic_cast< ElementTabSet* >(parser->GetParseFrame()->element);
		if (tabset)
		{
			tabset->SetTab(-1, tab_element);
			tab_element->RemoveReference();
		}

		return tab_element;

	}
	else if (name == "panel")
	{
		// Call default element handler for all children.
		parser->PushDefaultHandler();

		Core::Element* panel_element = Core::Factory::InstanceElement(parser->GetParseFrame()->element, "*", "panel", attributes);

		ElementTabSet* tabset = rocket_dynamic_cast< ElementTabSet* >(parser->GetParseFrame()->element);
		if (tabset)
		{
			tabset->SetPanel(-1, panel_element);
			panel_element->RemoveReference();
		}

		return panel_element;
	}
	else if (name == "tabs" || name == "panels")
	{	
		// Use the element handler to add the tabs and panels elements to the the tabset (this allows users to
		// style them nicely), but don't return the new element, as we still want the tabset to be the top of the
		// parser's node stack.

		Core::Element* parent = parser->GetParseFrame()->element;

		// Attempt to instance the element with the instancer.
		Core::Element* element = Core::Factory::InstanceElement(parent, name, name, attributes);
		if (!element)
		{
			Core::Log::Message(Rocket::Core::Log::LT_ERROR, "Instancer failed to create element for tag %s.", name.CString());
			return NULL;
		}

		// Add the element to its parent and remove the initial reference.
		parent->AppendChild(element);
		element->RemoveReference();
	}

	return NULL;
}