Luciad.Layers.Features.FeatureQueryConfiguration Class Reference

The FeatureQueryConfiguration specifies which conditions to use for feature querying based on the map's current scale. More...

Inheritance diagram for Luciad.Layers.Features.FeatureQueryConfiguration:

Classes
class	Builder
	Builder for the FeatureQueryConfiguration class. More...

Public Member Functions
void	Dispose ()
Luciad.Expressions.Expression	GetCondition (uint scaleLevel)
	Returns the model query condition at a certain scale level, or null if no condition is set for this scale level i.e. More...

Static Public Member Functions
static Luciad.Layers.Features.FeatureQueryConfiguration.Builder	NewBuilder ()
	Returns a new builder for creating a FeatureQueryConfiguration. More...

Properties
System.Collections.Generic.IList< Luciad.Maps.MapScale >	ScaleBreaks [get]
	The scales at which the model query condition changes, ordered from zoomed out to zoomed in. More...
uint	ScaleLevelCount [get]
	The scale level count. More...

Detailed Description

The FeatureQueryConfiguration specifies which conditions to use for feature querying based on the map's current scale.

Member Function Documentation

Dispose()

void Luciad.Layers.Features.FeatureQueryConfiguration.Dispose ( )

inline

GetCondition()

Luciad.Expressions.Expression Luciad.Layers.Features.FeatureQueryConfiguration.GetCondition ( uint  scaleLevel )

inline

Returns the model query condition at a certain scale level, or null if no condition is set for this scale level i.e.

all features are selected.

Parameters

scaleLevel

the desired scale level to retrieve the condition for. This value must be smaller than the count returned by FeatureQueryConfiguration.ScaleLevelCount. If not, an exception is thrown.

Returns

the model query condition at a certain scale level, or null if no condition is set for this scale level i.e. all features are selected.

Exceptions

System.ArgumentException

If scaleLevel parameter is greater or equal than the scale level count.

Since

2020.2

See also

FeatureQueryConfiguration.ScaleLevelCount

NewBuilder()

static Luciad.Layers.Features.FeatureQueryConfiguration.Builder Luciad.Layers.Features.FeatureQueryConfiguration.NewBuilder ( )

inlinestatic

Returns a new builder for creating a FeatureQueryConfiguration.

Returns

a new builder for creating a FeatureQueryConfiguration.

Property Documentation

ScaleBreaks

System.Collections.Generic.IList<Luciad.Maps.MapScale> Luciad.Layers.Features.FeatureQueryConfiguration.ScaleBreaks

get

The scales at which the model query condition changes, ordered from zoomed out to zoomed in.

[get]

Returns the scales at which the model query condition changes, ordered from zoomed out to zoomed in. This set contains every min or max scale that was passed to the builder through FeatureQueryConfiguration.Builder.AddCondition once. The values MapScale.maxZoomedOut() or MapScale.maxZoomedIn() are an exception and will never be contained in this set, as these values are considered to be the bounds of valid scale values and therefore not an actual scale break.

Scale breaks define the borders of the defined scale levels. This means that there is one more scale level than there are scale breaks. Imagine for example that 3 scale levels were added:

• [MaxZoomedOut, scaleBreak1] -> condition1
• [scaleBreak1, scaleBreak2] -> condition2
• [scaleBreak2, MaxZoomedIn] -> condition3

These 3 scale levels correspond with:

• 2 scale breaks, returned by this method: {scaleBreak1, scaleBreak2}
• 3 conditions, returned by the FeatureQueryConfiguration.GetCondition method: {condition1, condition2, condition3}

ScaleLevelCount

uint Luciad.Layers.Features.FeatureQueryConfiguration.ScaleLevelCount

get

The scale level count.

[get]

Returns the scale level count. This is the number of scale breaks + 1.

Since

2020.2 [get]

See also

FeatureQueryConfiguration.GetCondition