[Laszlo-user] Extending a base component

[Cary Clark]

...even when I tried the code WITH the handler in it...:-)

<canvas>
    <include href="base/basegridrow.lzx"/>

    <class name="mygridrow" extends="basegridrow">
        <handler name="ondblclick" >
            Debug.write("2xclick");
        </handler>
    </class>
 
    <dataset name="weatherdata" request="true" 
src="http://www.laszlosystems.com/cgi-pub/weather.cgi?zip=73003"/>
    <grid datapath="weatherdata:/weather" contentdatapath="forecast/day" 
_rowclass="mygridrow"/>
</canvas>

Cary Clark wrote:
> Hey Dave, try this simple addition:
>
> <canvas>
>    <include href="base/basegridrow.lzx"/>
>
>    <class name="mygridrow" extends="basegridrow"/>
>    <dataset name="weatherdata" request="true" 
> src="http://www.laszlosystems.com/cgi-pub/weather.cgi?zip=73003"/>
>    <grid datapath="weatherdata:/weather" 
> contentdatapath="forecast/day" _rowclass="mygridrow"/>
> </canvas>
>
> I added that and it compiled....doesn't seem to print the double click 
> message, but it compiles.
>
> Cary
>
>
> Dave Miller wrote:
>> When I needed to add some functionality to a grid row, instead of 
>> editing basegridrow.lzx, I extended the class like so:
>>
>> <class name="mygridrow" extends="basegridrow" >
>>     <handler name="ondblclick" >
>>         Debug.write("2xclick");
>>     </handler>
>> </class>
>>
>> <grid _rowclass="mygridrow" datapath=...
>>
>>
>>
>> This worked fine in 4.0.7. When I recently upgraded to 4.0.12 this 
>> broke. I got the compilation error:
>>
>> base/basegridrow.lzx:4:55: undefined superclass basecomponent for 
>> class basegridrow
>>
>>
>> I understand how my locally declared class might not see the new 
>> super class 'basecomponent', but was this an intentional change? Or a 
>> bug?
>>
>> Test script below.
>>
>> Thanks,
>>
>> Dave
>>
>>
>> Works in 4.0.7. Errors in 4.0.12
>>
>> <canvas>
>>     <class name="mygridrow" extends="basegridrow"/>
>>     <dataset name="weatherdata" request="true" 
>> src="http://www.laszlosystems.com/cgi-pub/weather.cgi?zip=10022"/>
>>     <grid datapath="weatherdata:/weather" 
>> contentdatapath="forecast/day" _rowclass="mygridrow"/>
>> </canvas>
>>
>