Class CMLayerDataset extends CM2Layer
CMLayerDataset Class
Note that the CMDataVector has an array for selection so that
we can manage the selection of Features, Areas, Polys, and coordinates
Settings Group: Dataset
| Setting |
Name |
Type |
Options |
Default |
Comments |
| URL |
URL |
CMTYPE_STRING |
|
null |
Full or partial URL to the dataset to load into the layer |
| Format |
Format |
CMTYPE_INDEXES |
CMDataset.FormatOptions, Default:CMDataset.GEOJSON |
CMDataset.GEOJSON |
Type of data to load. |
| NorthPoleColor |
NorthPoleColor |
CMTYPE_COLOR |
|
null |
Color used to fill in the north pole for pyramid layers |
| SouthPoleColor |
SouthPoleColor |
CMTYPE_COLOR |
|
null |
Color used to fill in the south pole for pyramid layers |
Object Functions
Object Functions
SetBounds(NewBounds)
Check if the feature is visible in the view.
This should be called by subclasses but can also be called to limit a layer's bounds after loading.
Parameters:
NewBounds - Object for Bounds with format {XMin,XMax,YMin,YMax}
Bounds=GetBounds()
Returns the bounds of the data within the layer. Computed after loading the data.
Returns: Bounds - with format {XMin,XMax,YMin,YMax}
SetSelectedFeature(NewFeatureIndex)
Sets the feature that is selected
Parameters:
NewFeatureIndex - >=0 indicates a feature, -1 is for none.
SetMouseOverFeature(NewFeatureIndex)
Sets the current feature that the mouse is over
Parameters:
NewFeatureIndex - index to the feature the mouse is over (typcially returned by In())
RequestData()
Called to obtain the data for the layer from a URL.
SetData(TheData, DataSetType)
Set existing data into the layer. Allocates a CMDataset object if needed.
Parameters:
TheData - the URL to use to obtain data
DataSetType - optional data set type (GeoJSON is the default)
TheDataset=HaveDataset()
Gets the dataset from this object. Allocates the dataset if it has not already
been allocated.
Returns: TheDataset - the data set associated with the layer or null for none
SetDataset(NewDataset)
Sets the dataset for this layer to get data from
Parameters:
NewDataset - the new dataset