public InterfaceModel(InputStream iStream) {
// panelgrid receives children in order
treeStructure = new HtmlPanelGrid();
treeStructure.setColumns(1);
interfaceModelBuilder = new InterfaceModelBuilder(iStream);
currentPanel = null;
treeButtonIncr = 0;
initializeInterface();
}
// expands a node, updates its expansion state. updates its loaded state if
// applicable and updates the panelGrid
private void expandNode(CustomButtonNode button) {
// TODO: add an ordering attribute to the RDF file so the model returns the items
// in proper order
if (!button.isLoaded()) {
int index = treeStructure.getChildren().indexOf(button);
ElementMold[] fields = interfaceModelBuilder.getChildrenOf(button.getValue().toString());
HtmlPanelGroup childrenContainer = new HtmlPanelGroup();
for (int a = 0; a < fields.length; a++) {
if (fields[a].getInputType().equals("button")) {
CustomButtonNode newNode = this.buildButtonNode(fields[a].getName(), button);
button.getChildren().add(newNode);
}
}
for (int a = 0; a < fields.length; a++) {
if (fields[a].getInputType().equals("outputText")) {
HtmlOutputText newText = this.buildOutputTextField(fields[a].getText(), button);
childrenContainer.getChildren().add(newText);
}
}
for (int a = 0; a < fields.length; a++) {
if (fields[a].getInputType().equals("selectInput")) {
HtmlSelectOneMenu newSelector = this.buildSelectBox(fields[a].getOptions(), button);
childrenContainer.getChildren().add(newSelector);
}
}
for (int a = 0; a < fields.length; a++) {
if (fields[a].getInputType().equals("inputText")) {
HtmlInputText newText = this.buildInputTextField(button);
childrenContainer.getChildren().add(newText);
}
}
if (childrenContainer.getChildCount() > 0) {
button.getChildren().add(childrenContainer);
}
button.setLoaded(true);
treeStructure.getChildren().addAll(index + 1, button.getChildren());
} else {
expandChildrenOf(button);
}
button.setExpanded(true);
updateInterface();
}
private void initializeInterface() {
ElementMold[] rootNodes = interfaceModelBuilder.getRootNodes();
for (int a = 0; a < rootNodes.length; a++) {
if (rootNodes[a].getInputType().equals("button")) {
CustomButtonNode nodeToAdd = buildButtonNode(rootNodes[a].getName(), null);
nodeToAdd.setLoaded(false);
nodeToAdd.setExpanded(false);
treeStructure.getChildren().add(nodeToAdd);
updateInterface();
}
}
}
// called when a component is being expanded that has expanded child button nodes
private void expandChildrenOf(CustomButtonNode button) {
int index = treeStructure.getChildren().indexOf(button);
List children = button.getChildren();
// inserts node items into the appropriate positions in the panelGrid
// children collection
for (int a = 0; a < children.size(); a++) {
treeStructure.getChildren().add(index + 1 + a, (UIComponent) children.get(a));
}
// checks every child, if it is a button and its expanded state is set to true,
// recursively call the method to expand the child node
for (int a = 0; a < children.size(); a++) {
Object curChild = children.get(a);
if (curChild instanceof CustomButtonNode) {
CustomButtonNode curButton = (CustomButtonNode) curChild;
if (curButton.isExpanded()) {
this.expandChildrenOf(curButton);
}
}
}
}
// removes all children of the button from the panelGrid to give the appearance
// of the node collapsing
private void removeAllChildrenOf(CustomButtonNode button) {
List children = button.getChildren();
// removes every child of the button from the panel grid.
// If the node has child buttons that are also expanded, it recursively calls
// itself to remove their children as well
for (int a = 0; a < children.size(); a++) {
Object curChild = children.get(a);
if (curChild instanceof CustomButtonNode && ((CustomButtonNode) curChild).isExpanded()) {
removeAllChildrenOf((CustomButtonNode) curChild);
}
treeStructure.getChildren().remove(curChild);
}
}
// necessary housekeeping method that executes updates to the interface
private void updateInterface() {
treeStructure.processUpdates(FacesContext.getCurrentInstance());
}