Database blob files in a custom tilegrid

[Niels_EMP]

SmartClient Version: v10.0p_2015-10-16/Pro Deployment (built 2015-10-16)

I have a TileGrid similar to the one in http://www.smartclient.com/smartgwte...se/#upload_sql which shows user uploaded pictures from a database, but I want to use a custom TileConstructor like in http://www.smartclient.com/smartgwt/...#tiling_custom

My problem is that I cant get the TileGrid to send viewFile requests when I use the custom TileConstructor.

If I dont set a tile constructor everything works fine and the tilegrid viewFile requests.

Am I wrong in using FileItem? Should I use something else in the tile constructor?

TileGrid:

DataSource dataSource = DataSource.get("datasource");

final TileGrid mediaTileGrid = new TileGrid();
mediaTileGrid.setWidth("100%");  
mediaTileGrid.setHeight(224);  
mediaTileGrid.setTileWidth(100);  
mediaTileGrid.setTileHeight(150);  
mediaTileGrid.setDataSource(dataSource);  
mediaTileGrid.setAutoFetchData(true);
mediaTileGrid.setTileConstructor(AnimalTile.class.getName());

TileConstructor class:

import com.smartgwt.client.types.Overflow;
import com.smartgwt.client.widgets.form.DynamicForm;
import com.smartgwt.client.widgets.form.fields.FileItem;
import com.smartgwt.client.widgets.form.fields.StaticTextItem;

public class AnimalTile extends DynamicForm {  
    
    public AnimalTile() {  
        setOverflow(Overflow.HIDDEN);  
        setHeight(150);  
        setWidth(200);  
  
        FileItem fileItem = new FileItem("image");
        fileItem.setType("imageFile");
        fileItem.setShowFileInline(true);
        fileItem.setRowSpan(3);  
        fileItem.setCanEdit(false);  
  
        StaticTextItem commonName = new StaticTextItem("title");  
        commonName.setShowTitle(false);  
        setFields(fileItem, commonName);  
    }  
}

ds.xml

<DataSource 
    ID="datasource" 
    serverConstructor="Servlet">
    <fields>  
        <field name="pk" type="sequence" hidden="true" primaryKey="true"/>  
        <field name="title"/>  
        <field name="image" type="imageFile"/>  
    </fields>  
</DataSource>

[Isomorphic]

Did you enable Reflection? You don't seem to have, and it's required.

You also haven't said what you're seeing, or whether there are any error messages or warnings.

[Niels_EMP]

Yes Reflection has been enabled in the same way as in http://www.smartclient.com/smartgwt/...#tiling_custom

public interface AnimalTileMetaFactory extends BeanFactory.MetaFactory {  
    BeanFactory<AnimalTile> getAnimalTileFactory();  
}

and then in the method where the TileGrid is instantiated I run

GWT.create(AnimalTileMetaFactory.class);

I am not seeing any warnings or error messages.
The tiles look like this:



Here is the fetch response from the tilegrid datasource, remember this works when I am not using a custom TileConstructor.

{
    affectedRows:0,
    data:[
        {
            image_filename:"file_1.jpg",
            image_filesize:1024,
            title:"title 1",
            image_date_created:"2015-12-09T21:54:11.066",
            pk:1
        },
        {
            image_filename:"file_2.jpg",
            image_filesize:1024,
            title:"title 2",
            image_date_created:"2015-12-09T21:54:11.066",
            pk:2
        },
        {
            image_filename:"file_3.jpg",
            image_filesize:1024,
            title:"title 3",
            image_date_created:"2015-12-09T21:54:11.066",
            pk:3
        }
    ],
    invalidateCache:false,
    isDSResponse:true,
    operationType:"fetch",
    queueStatus:0,
    status:0
}

[Isomorphic]

We think we see the problem - your custom tile consists of a DynamicForm, but that form has no DataSource, so it has no idea where to fetch files from.

[Niels_EMP]

Ahh yes, that solved it. Thanks a lot.

[Niels_EMP]

Just a quick follow up question.

Is it possible to pass arguments to the TileConstructor?

[Isomorphic]

No, unfortunately. Limitations of GWT make that impossible, or rather, the mechanism would be so awkward it would be far worse than any other way of providing initialization data you might come up with.

[Niels_EMP]

Alright, no problem. I figured out a way to do it without arguments.

Thanks for the help.