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Never mind,
there was a bug with Option, which I've now fixed...
It works.
Cheers!
Neil
On Wednesday 28 Aug 2002 5:31 pm, Neil Clayton wrote:
> Hi all,
>
> I've been experimenting with Selection and Option components, and am having
> just one difficulty. When I execute my example code, I get the required
> HTML, except that no labels are produced for each option.
>
> To example how I am going about this:
>
> 0) The example is a very simple form showing some set of colours, with
> multiple selection enabled.
> 1) there is a single HTML page, with form, select and option compoments.
> The option component is wrapped in a foreach.
> 2) The foreach accesses it's source values (a list) from the Visit object.
> 3) The foreach sets it's 'current value' on the visit object as well.
> 4) The Option statement takes its values (selected, label) from the
> 'current value' on the visit object.
> 5) The 'current value' is a very simple class, containing a boolean (for
> 'selected' and a String (for the label).
>
>
>
> Anyone got any hints for me?
>
>
> Cheers,
> Neil Clayton
>
> (see below for all related output and files)
>
>
>
> The HTML produced by Tapestry (2.2, CVS) is as follows:
> <body>
> <h1>Example of Select and Option HTML element</h1>
> <form method="post" name="Form0" action="/componentref">
> <input type="hidden" name="service" value="direct">
> <input type="hidden" name="context" value="Selection/form">
> <input type="hidden" name="sp" value="S0">
> Select a colour:
> <select name="selection" multiple>
>
> <option value="0">
>
>
> <option value="1">
>
>
> <option value="2">
>
>
> <option value="3">
>
>
> <option value="4">
>
>
> <option value="5">
>
>
> <option value="6">
>
>
> </select>
> <input type="hidden" name="Form0" value="1">
> </form>
> </body>
>
>
> For reference, here are the relevant Tapestry bits:
> ----------------------------------------------------------------
> The page specification is:
> ----------------------------------------------------------------
> <specification class="examples.componentref.Selection" allow-body="yes"
> allow-informal-parameters="yes" >
> <bean name="validationDelegate"
> class="net.sf.tapestry.valid.ValidationDelegate" lifecycle="request"/>
>
> <component id="form" type="Form">
> <binding name="delegate" property-path="beans.validationDelegate"/>
> <binding name="listener" property-path="listeners.formSubmit"/>
> </component>
>
> <component id="colours" type="Foreach">
> <binding name="source" property-path="visit.colours"/>
> <binding name="value" property-path="visit.currentColour"/>
> </component>
>
> <component id="selection" type="Select">
> <field-binding name="multiple" field-name="Boolean.TRUE"/>
> </component>
>
> <component id="colour" type="Option">
> <binding name="selected"
> property-path="visit.currentColour.selected"/> <binding name="label"
> property-path="visit.currentColour.label"/> </component>
> </specification>
>
>
> The HTML is:
> ----------------------------------------------------------------
> <body>
> <h1>Example of Select and Option HTML element</h1>
> <form jwcid="form">
> Select a colour:
> <input jwcid="selection">
> <span jwcid="colours">
> <option jwcid="colour"/>
> </span>
> </input>
> </form>
>
> </body>
>
>
> And the Visit object (well, part of it):
> ----------------------------------------------------------------
> public Collection getColours() {
> if(colours == null) {
> colours = new ArrayList();
> colours.add(new Colour("Green"));
> colours.add(new Colour("Blue"));
> colours.add(new Colour("Red"));
> colours.add(new Colour("White"));
> colours.add(new Colour("Purple"));
> colours.add(new Colour("Dark Black"));
> colours.add(new Colour("Fiji Blue"));
> }
> return colours;
> }
>
> /**
> * Returns the currentColour.
> * @return Colour
> */
> public Colour getCurrentColour() {
> return currentColour;
> }
>
> /**
> * Sets the currentColour.
> * @param currentColour The currentColour to set
> */
> public void setCurrentColour(Colour currentColour) {
> this.currentColour = currentColour;
> }
>
> private List colours;
> private Colour currentColour;
>
>
> ----------------------------------------------------------------
> Finally, the Colour class:
> ----------------------------------------------------------------
> public class Colour {
> public Colour(String label) {
> setLabel(label);
> }
>
> public Colour(String label, boolean selected) {
> setLabel(label);
> setSelected(selected);
> }
>
> /**
> * Returns the isSelected.
> * @return boolean
> */
> public boolean getSelected() {
> return selected;
> }
>
> /**
> * Returns the label.
> * @return String
> */
> public String getLabel() {
> return label;
> }
>
> /**
> * Sets the isSelected.
> * @param isSelected The isSelected to set
> */
> public void setSelected(boolean isSelected) {
> this.selected = isSelected;
> }
>
> /**
> * Sets the label.
> * @param label The label to set
> */
> public void setLabel(String label) {
> this.label = label;
> }
>
> private String label;
> private boolean selected;
> }
- --
Neil
(BTW: If you see weird text surrounding the message and you don't know what it
is, don't worry, it's just my public PGP signature).
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