C++ Element::RemoveReference方法代码示例

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;
}

// Adds a new option to the select control.
int WidgetDropDown::AddOption(const Rocket::Core::String& rml, const Rocket::Core::String& value, int before, bool select, bool selectable)
{
	// Instance a new element for the option.
	Core::Element* element = Core::Factory::InstanceElement(selection_element, "*", "option", Rocket::Core::XMLAttributes());

	// Force to block display and inject the RML. Register a click handler so we can be notified of selection.
	element->SetProperty("display", "block");
	element->SetProperty("clip", "auto");
	element->SetInnerRML(rml);
	element->AddEventListener("click", this);

	int option_index;
	if (before < 0 ||
		before >= (int) options.size())
	{
		selection_element->AppendChild(element);
		options.push_back(SelectOption(element, value, selectable));
		option_index = (int) options.size() - 1;
	}
	else
	{
		selection_element->InsertBefore(element, selection_element->GetChild(before));
		options.insert(options.begin() + before, SelectOption(element, value, selectable));
		option_index = before;
	}

	element->RemoveReference();

	// Select the option if appropriate.
	if (select)
		SetSelection(option_index);

	box_layout_dirty = true;
	return option_index;
}

// Sets the specifed tab index's tab panel RML.
void ElementTabSet::SetPanel(int tab_index, const Rocket::Core::String& rml)
{
	Core::Element* element = Core::Factory::InstanceElement(NULL, "*", "panel", Rocket::Core::XMLAttributes());
	Core::Factory::InstanceElementText(element, rml);
	SetPanel(tab_index, element);
	element->RemoveReference();
}

Core::Element* ElementTabSet::GetChildByTag(const Rocket::Core::String& tag)
{
	// Look for the existing child
	for (int i = 0; i < GetNumChildren(); i++)
	{
		if (GetChild(i)->GetTagName() == tag)
			return GetChild(i);
	}

	// If it doesn't exist, create it
	Core::Element* element = Core::Factory::InstanceElement(this, "*", tag, Rocket::Core::XMLAttributes());
	AppendChild(element);
	element->RemoveReference();
	return 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;
}