Use the CustomElements property to add or remove custom elements to the current scale, as well as to customize different settings of individual custom elements. A single custom element is an instance of the ScaleCustomElement class and can be accessed via the GaugeDependencyObjectCollectionBase<T>.Item property of a ScaleCustomElementCollection object.
This example illustrates how to add two buttons as custom elements to the linear scale and use them to increase or decrease the current scale value.
For this, create two ScaleCustomElement objects and add a button control to each custom element.
Finally, to provide the capability for end-users to change the scale's value, handle the button1_Click and button2_Click events and write code that will increment and decrement the scale value.
| C#:MainWindow.xaml.cs |
using System.Windows;
namespace LinearGauge_CustomElement {
public partial class MainWindow : Window {
public MainWindow() {
InitializeComponent();
}
private void button1_Click(object sender, RoutedEventArgs e) {
if (bar.Value < 100)
bar.Value += 10;
}
private void button2_Click(object sender, RoutedEventArgs e) {
if (bar.Value > 0)
bar.Value -= 10;
}
}
}
|
| VB:MainWindow.xaml.vb |
Imports Microsoft.VisualBasic
Imports System.Windows
Namespace LinearGauge_CustomElement
Partial Public Class MainWindow
Inherits Window
Public Sub New()
InitializeComponent()
End Sub
Private Sub button1_Click(ByVal sender As Object, ByVal e As RoutedEventArgs)
If bar.Value < 100 Then
bar.Value += 10
End If
End Sub
Private Sub button2_Click(ByVal sender As Object, ByVal e As RoutedEventArgs)
If bar.Value > 0 Then
bar.Value -= 10
End If
End Sub
End Class
End Namespace
|
| Xaml:MainWindow.xaml |
<Window x:Class="LinearGauge_CustomElement.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="450" Width="325">
<Grid>
<dxga:LinearGaugeControl Name="linearGaugeControl1" Width="170" >
<dxga:LinearGaugeControl.Scales>
<dxga:LinearScale >
<dxga:LinearScale.CustomElements>
<dxga:ScaleCustomElement VerticalAlignment="Top" HorizontalAlignment="Right">
<Button Name="button1" Content="Up" Width="40" Click="button1_Click" />
</dxga:ScaleCustomElement>
<dxga:ScaleCustomElement VerticalAlignment="Bottom" HorizontalAlignment="Right">
<Button Name="button2" Content="Down" Width="40" Click="button2_Click" />
</dxga:ScaleCustomElement>
</dxga:LinearScale.CustomElements>
<dxga:LinearScale.LevelBars >
<dxga:LinearScaleLevelBar x:Name="bar" Value="50" />
</dxga:LinearScale.LevelBars >
<dxga:LinearScale.Layers>
<dxga:LinearScaleLayer />
</dxga:LinearScale.Layers>
</dxga:LinearScale>
</dxga:LinearGaugeControl.Scales>
<dxga:LinearGaugeControl.Model>
<dxga:LinearCleanWhiteModel />
</dxga:LinearGaugeControl.Model>
</dxga:LinearGaugeControl>
</Grid>
</Window>
|