Here's a simplified example that illustrates what we're doing.
I tried adding the LzDelegate in an "init" method as indicated in the
documentation, but I couldn't get it to work. The only way it seemed to work
was using $once and putting it in an attribute. Are the docs wrong?
How can I be sure that I'm not leaking memory?
<canvas>
<class name="subPanel" bgcolor="black" width="100" height="100">
<attribute name="mydel" type="expression"
value="$once{new LzDelegate(this, 'destroy', anim_hide, 'onstop')}"/>
<animator name="anim_show" attribute="opacity" from="0" to="1"
duration="500" start="false"/>
<animatorgroup name="anim_hide" start="false" process="simultaneous">
<animator attribute="opacity" from="1" to="0" duration="500"/>
<animator attribute="width" from="100" to="0" duration="500"/>
</animatorgroup>
<button text="Del" onclick="mp.delPanel(classroot)"/>
<method name="destroy">
this.mydel.unregisterAll();
super.destroy();
</method>
</class>
<class name="mainPanel" bgcolor="black" width="100" height="100">
<attribute name="numpanels" value="0" />
<button text="Add" onclick="classroot.addPanel()"/>
<view name="container" x="101" width="504" height="100">
<simplelayout axis="x" spacing="1"/>
</view>
<method name="addPanel">
if(this.numpanels != 5) {
var p = new subPanel(container);
p.anim_show.doStart();
this.numpanels++;
}
</method>
<method name="delPanel" args="p">
this.numpanels--;
p.anim_hide.doStart();
</method>
</class>
<mainPanel id="mp"/>
</canvas>
-----Original Message-----
From: Dan Stowell [mailto:[EMAIL PROTECTED]
Sent: Friday, April 21, 2006 1:29 PM
To: William Krick; Laszlo-User
Subject: RE: [Laszlo-user] how to animate a view, then delete it?
A general word on destroy():
1. Delete all references to the object-to-be-destroyed.
2. Unregister all delegates for the object-to-be-destroyed.
This gives the object some hope of being garbage-collected.
Dan
On Fri, Apr 21, 2006 at 12:03 PM, William Krick wrote:
> In my app, have a button that deletes a view using destroy().
> I want to be able to animate the view by fading it out before it is
> destroyed.
>
> Here's the code I have in the view...
>
> <animator name="anim_del" attribute="opacity" from="1" to="0"
> duration="500" start="false"/>
>
> ...and here's the button event...
>
> <method name="delView" args="v">
> v.anim_del.doStart();
> v.destroy();
> </method>
>
> The problem is that the destroy() method is called immedately before
> the
> animation gets a chance to finish.
>
> How do I solve this problem?
>
> Is there any sort of end of animation trigger that I can hook onto?
>
> _______________________________________________
> Laszlo-user mailing list
> [email protected]
> http://www.openlaszlo.org/mailman/listinfo/laszlo-user
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