SymbolDictionary Class

A dictionary that stores elements for custom symbol mapping.

Namespace: DevExpress.Xpf.Gauges

Assembly: DevExpress.Xpf.Gauges.v19.2.dll

Declaration

C#

public class SymbolDictionary :
    WeakEventListenerCollection<SymbolSegmentsMapping>

VB.NET

Public Class SymbolDictionary
    Inherits WeakEventListenerCollection(Of SymbolSegmentsMapping)

Related API Members

The following members return SymbolDictionary objects:

• SegmentsView.SymbolMapping
• SymbolViewBase.CustomSymbolMapping

Remarks

An object of the SymbolDictionary class is returned by the SymbolViewBase.CustomSymbolMapping property.

An element of the symbol dictionary can be accessed as an item of the GaugeDependencyObjectCollection<T> object returned by the GaugeDependencyObjectCollectionBase<T>.Item property.

Example

This example demonstrates how to display custom characters on a DigitalGaugeControl. This is done via the Custom Symbol Mapping feature that defines which segments should be activated for every custom character.

In this sample we will display “HELLO.” using the 7 Segment View type. Note that, by default, these characters can’t be displayed in this view (because 7 segments are not enough to provide unique representations for all Latin characters), but some characters can be efficiently displayed via custom symbol mapping.

For this, it is necessary to use the SymbolSegmentsMapping.SegmentsStates property to specify appropriate segment states for every desired character. In our case, these will be the following characters: “H”, “E”, “L”, “O”, “.” Note that for the dot character, we set the SymbolSegmentsMapping.SymbolType property value to Additional, so that it will be displayed in the same segment with the previous character.

Then, we specify the text that should be displayed on the segments panel via the DigitalGaugeControl.Text property.

Note

A complete sample project is available at https://github.com/DevExpress-Examples/how-to-use-custom-symbol-mapping-in-the-digital-gauge-control-e3523.

MainWindow.xaml

<Window x:Class="CustomSymbolMapping.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
        xmlns:dxga="http://schemas.devexpress.com/winfx/2008/xaml/gauges"
        Title="MainWindow" Height="350" Width="525">
    <Grid>
        <dxga:DigitalGaugeControl Name="digitalGaugeControl1" Text="HELLO.">
            <dxga:DigitalGaugeControl.SymbolView>
                <dxga:SevenSegmentsView>
                    <dxga:SevenSegmentsView.CustomSymbolMapping>
                        <dxga:SymbolSegmentsMapping Symbol="H" SegmentsStates="0 1 1 0 1 1 1"/>
                        <dxga:SymbolSegmentsMapping Symbol="E" SegmentsStates="1 0 0 1 1 1 1"/>
                        <dxga:SymbolSegmentsMapping Symbol="L" SegmentsStates="0 0 0 1 1 1 0"/>
                        <dxga:SymbolSegmentsMapping Symbol="O" SegmentsStates="1 1 1 1 1 1 0" />
                        <dxga:SymbolSegmentsMapping Symbol="." SegmentsStates="0 0 0 0 0 0 0 1" 
                                                               SymbolType="Additional"/>
                    </dxga:SevenSegmentsView.CustomSymbolMapping>
                </dxga:SevenSegmentsView>
            </dxga:DigitalGaugeControl.SymbolView>
        </dxga:DigitalGaugeControl>
    </Grid>
</Window>

Inheritance

Object

DispatcherObject

DependencyObject

Freezable

Animatable

FreezableCollection<SymbolSegmentsMapping>

GaugeDependencyObjectCollectionBase<SymbolSegmentsMapping>

GaugeDependencyObjectCollection<SymbolSegmentsMapping>

DevExpress.Xpf.Gauges.WeakEventListenerCollection<SymbolSegmentsMapping>

SymbolDictionary