Apple WebObjects 3.5 Manual de usuario descargar pdf (Pagina 116)

Chapter 3 Creating a WebObjects Database Application

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Again because the browser uses a vector for its selections attribute, the

setTalentSelection method must take a vector as its argument. If talentVector’s size

is nonzero, then this method sets the selected MovieRole’s

talent to the ﬁrst

object in the vector. Note that by default, a user can’t select more than one

actor in a browser.

With the addition of these methods, WebObjects Builder now displays

talentSelection in MovieDetail’s object browser.

6. Bind

talentSelection to the browser’s selections attribute.

Adding Insert, Save, and Delete Buttons

Now add the buttons that let users insert, save, and delete MovieRoles. When

you’re done, it should look like the following:

1. Inside the form, add three image buttons below the Role Name text ﬁeld.

2. Inspect the ﬁrst active image element.

3. Bind the

ﬁlename attribute to the text (including the quotes)

"DBWizardInsert.gif".

4. Follow the same procedure to set the second image’s

ﬁlename attribute to the

text (including the quotes)

"DBWizardUpdate.gif".

5. Set the last image’s

ﬁlename attribute to the text (including the quotes)

"DBWizardDelete.gif".

The DisplayGroup class deﬁnes the actions

insert and delete that you’ll bind

to the Insert/New and Delete buttons. It doesn’t, however, provide a save

method. You’ll have to provide that yourself.

Add the image buttons inside

the form element, which is

bounded by a light gray box.

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Apple WebObjects 3.5 Manual de usuario Pagina 116