Examples of org.apache.cocoon.forms.formmodel.Widget

Package org.apache.cocoon.forms.formmodel

Examples of org.apache.cocoon.forms.formmodel.Widget

org.apache.cocoon.forms.formmodel.Widget
Interface to be implemented by Widgets. In CForms, a form consists of a number of widgets. Each widget:
- has an id, unique within its parent context widget. See {@link #getId()}.
- can have a parent (see {@link #getParent()}.
- can hold a value (which can be any kind of object). See {@link #getValue()}.
- can read its value from a request object (and convert it from a string to its native type). See {@link #readFromRequest(FormContext)}.
- can validate itself. See {@link #validate()}.
- can generate an XML representation of itself.
When a request is submitted, first the {@link #readFromRequest(FormContext)} method of all widgetswill be called so that they can read their value(s). Next, the {@link #validate()} method willbe called. Doing this in two steps allows the validation to compare values between widgets. See also the method {@link Form#process(FormContext)}.

A Widget is created by calling the createInstance method on the a {@link WidgetDefinition}. A Widget holds all the data that is specific for a certain use of the widget (its value, validationerrors, ...), while the WidgetDefinition holds the data that is static accross all widgets. This keeps the Widgets small and light to create. This mechanism is similar to classes and objects in Java. @version $Id: Widget.java 155210 2005-02-24 17:02:09Z sylvain $

                        repeater.addRow();
                    }
                }
            }
        } else if (delegate != null) {
            Widget sub = delegate.lookupWidget(id);
            if (sub instanceof Field) {
                Field field = (Field)sub;
                value = unwrap(value);
                if (value instanceof Double) {
                    // make cforms accept a JS Number

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                if (repeaterWidget && !(widget instanceof Repeater)) {
                    throw new SAXException("FormsTemplateTransformer: the element \"repeater-widget\" can only be used for repeater widgets.");
                }
            } else if (localName.equals(WIDGET_LABEL)) {
                checkContextWidgetAvailable(qName);
                Widget widget = getWidget(attributes);
                widget.generateLabel(contentHandler);
            } else if (localName.equals(REPEATER_WIDGET_LABEL)) {
                checkContextWidgetAvailable(qName);
                Widget widget = getWidget(attributes);
                if (!(widget instanceof Repeater)) {
                    throw new SAXException("FormsTemplateTransformer: the element \"repeater-widget-label\" can only be used for repeater widgets.");
                }
                String widgetId = attributes.getValue("widget-id");
                if (widgetId == null || widgetId.equals("")) {
                    throw new SAXException("FormsTemplateTransformer: the element \"repeater-widget-label\" requires a \"widget-id\" attribute.");
                }
                ((Repeater)widget).generateWidgetLabel(widgetId, contentHandler);
            } else if (localName.equals(REPEATER_SIZE)) {
                checkContextWidgetAvailable(qName);
                Widget widget = getWidget(attributes);
                if (!(widget instanceof Repeater))
                    throw new SAXException("FormsTemplateTransformer: the element \"repeater-size\" can only be used for repeater widgets.");
                contentHandler.startPrefixMapping(Constants.INSTANCE_PREFIX, Constants.INSTANCE_NS);
                ((Repeater)widget).generateSize(contentHandler);
                contentHandler.endPrefixMapping(Constants.INSTANCE_PREFIX);

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    protected Widget getWidget(Attributes attributes) throws SAXException {
        String widgetId = attributes.getValue("id");
        if (widgetId == null || widgetId.equals("")) {
            throw new SAXException("FormsTemplateTransformer: missing id attribute on a Cocoon Forms element.");
        }
        Widget widget = ((ContainerWidget)contextWidget).getChild(widgetId);
        if (widget == null) {
            throw new SAXException("FormsTemplateTransformer: widget with id \"" + widgetId + "\" does not exist in the container " + contextWidget.getRequestParameterName());
        }
        return widget;
    }

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        }
        return widgetId;
    }


    protected Widget getWidget(String widgetPath) throws SAXException {
        Widget widget = ((ContainerWidget)contextWidget).lookupWidget(widgetPath);
        if (widget == null) {
            if (contextWidget.getRequestParameterName().equals("")) {
                throwSAXException("No widget exists at the path \"" + widgetPath + "\", relative to the form container.");
            } else {
                throwSAXException("No widget exists at the path \"" + widgetPath + "\", relative to the container \"" +

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        }
    }


    public boolean has(String id, Scriptable start) {
        if (delegate != null && delegate instanceof ContainerWidget) {
            Widget sub = ((ContainerWidget)delegate).getChild(id);
            if (sub != null) {
                return true;
            }
        } 
        return super.has(id, start);

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        Object result = super.get(id, start);
        if (result != NOT_FOUND) {
            return result;
        }
        if (delegate != null && delegate instanceof ContainerWidget) {
            Widget sub = ((ContainerWidget)delegate).getChild(id);
            if (sub != null) {
                return wrap(sub);
            }
        }
        return NOT_FOUND;

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            List list = new LinkedList();
            for (int i = 0; i < result.length; i++) {
                list.add(result[i]);
            }
            while (iter.hasNext()) {
                Widget widget = (Widget)iter.next();
                list.add(widget.getId());
            }
            result = list.toArray();
        }
        return result;
    }

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        }
        return result;
    }


    private void deleteRow(Repeater repeater, int index) {
        Widget row = repeater.getRow(index);
        ScriptableWidget s = wrap(row);
        s.notifyRemoveRow();
        formWidget.deleteWrapper(row);
        repeater.removeRow(index);
    }

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        }
        return false;
    }


    public ScriptableWidget jsFunction_getChild(String id) {
        Widget sub = null;
        if (delegate instanceof ContainerWidget)
            sub = ((ContainerWidget)delegate).getChild(id);
        return wrap(sub);
    }

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            sub = ((ContainerWidget)delegate).getChild(id);
        return wrap(sub);
    }


    public ScriptableWidget jsFunction_lookupWidget(String id) {
        Widget sub = null;
        sub = delegate.lookupWidget(id);
        return wrap(sub);
    }

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