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setLayerDrawingOptions is not changing transparency setting

MasaoMatsuokaDev

ArcGISDynamicMapServiceLayer's setLayerDrawingOptions is not changing the transparency. It works for the showLabels property, so I think the setup is correct. Has anyone had any success with this?

var drawingOptions = [];
var drawOption = new esri.layers.LayerDrawingOptions();
drawOption.transparency = value / 100; // Not working!! - the value is the value from the slider's onChange event.
drawOption.showLabels = false // This test line works!
drawingOptions[idxLyr] = drawOption;
layer.setLayerDrawingOptions(drawingOptions, false);

ArcGIS Server 10.1 SP1 and JavaScript API 3.2

Thanks for any help.
Masao

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BrandonFlessner

I also had to enable support for dynamic layer on the map service in ArcGIS Server as well as set the image format to PNG32 for the dynamic layer.

sreeharikottoormadam

Hi,

ArcGISDynamicMapServiceLayer's setLayerDrawingOptions is changing the transparency? I wanted to change the layer transparency for a particular layer, not the entire dynamic map service layer. I have tried the below code, but not working.

var optionsArray = [];

var drawingOptions = new LayerDrawingOptions();

drawingOptions.transparency = value; //from a slider

optionsArray[0] = drawingOptions;

myLayer.setLayerDrawingOptions(optionsArray);

Thanks

JacksonGilman1

So what does drawOption.transparency do for the layer?

I'm interested in hearing an answer for this as well. We have a similar transparency slider scenario. Our map service is using layer-level transparency (not color-level), and the layer's default transparency is set to 40. If we were to set drawOption.transparency = 0, the resultant image is correctly opaque, however the colors are faded...leading me to believe the white background is being applied as a mask.

IOW, the Map Service's layer's original transparency setting is not getting entirely overridden when passing a layerDrawingOption. This is especially apparent when imageFormat is set to 'svg'. If I make a map export request with the dynamicLayers parameter similar to this:

[
    {
        "id": 0,
        "source": {
            "type": "mapLayer",
            "mapLayerId": 0
        },
        "drawingInfo": {
            "renderer": {
                "type": "simple",
                "label": "",
                "description": "",
                "symbol": {
                    "color": [0, 0, 0, 255],
                    "size": 20,
                    "angle": 0,
                    "xoffset": 0,
                    "yoffset": 0,
                    "type": "esriSMS",
                    "style": "esriSMSCircle",
                    "outline": {
                        "color": [0, 0, 0, 255],
                        "width": 1,
                        "type": "esriSLS",
                        "style": "esriSLSSolid"
                    }
                }
            },
            "transparency": 0,
            "showLabels": false
        },
        "minScale": 5000000,
        "maxScale": 0
    }
]

Note, transparency = 0 and the symbols should be solid black dots. The svg is this:

<svg version="1.1" xmlns="&ns_svg;" xmlns:xlink="&ns_xlink;" width="300pt" height="300pt" viewBox="0 0 300 300" xml:space="preserve" enable-background="new 0 0 300 300">
<g color-interpolation="linearRGB" transform="scale(0.75,0.75)">
<g>
 <rect x="0" y="0" width="400" height="400" fill="#FDFDFD" fill-opacity="1" />
</g>
<g id="">
<g opacity="0.6">
<g id="LAYER">

The SVG is still using the layer's original transparency setting of 40 (opacity of 0.6)

We will try the color-level transparency and see if it works better, but binding a slider control to the alpha values of every symbol in a layer's renderer would be rather cumbersome to code, and it would be nicer to have a single transparency value which could be applied for the entire layer. Has anyone else explored this issue?

Thanks!

MasaoMatsuokaDev

And make sure to set the image format to PNG32 for the dynamic layer...
layer.setImageFormat('png32');

MasaoMatsuokaDev

Additional info:
1) The layer is transparent in the print preview.[ATTACH=CONFIG]24558[/ATTACH]
2) The transparency works within a map service only. I have an aerial image served out of Image Server Extension underneath this layer, and I cannot see the image through the layer.[ATTACH=CONFIG]24559[/ATTACH]

I have set the transparency of the symbol color. But that only makes the color more pale, but not transparent. I also set the LayerDrawingOptions.transparency as well as the 'A' value of the fill symbol color to the same value. But that did not work either. I do not see anywhere else I can set transparency except for the entire map service.

MasaoMatsuokaDev

Thanks, I will try that. So what does drawOption.transparency do for the layer?

JianHuang

Please try to set the transparency in the symbol of the renderer.

JohnGravois

you're trying to set the transparency on the entire ArcGISDynamicMapServiceLayer? have you tried setting its opacity property instead?

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