DashboardDesigner.RestoreDashboardItemAsync() Method

Restores the item size if an item is expanded to the entire dashboard size (maximized) in an asynchronous task.

Namespace: DevExpress.DashboardWin

Assembly: DevExpress.Dashboard.v19.2.Win.dll

Declaration

C#

public Task RestoreDashboardItemAsync()

VB.NET

Public Function RestoreDashboardItemAsync As Task

Returns

Type	Description
Task	The task object that is the asynchronous operation to complete.

Remarks

To maximize an item, call the DashboardViewer.MaximizeDashboardItemAsync method.

Example

This example demonstrates how to call the asynchronous maximize and restore methods to create a slide show with the dashboard items.

Note

The complete sample project How to Create a Slide Show with Asynchronous Maximize and Restore Methods is available in the DevExpress Examples repository.

C#

using DevExpress.XtraEditors;
using System;
using System.Windows.Forms;

namespace MaximizeSlideShow
{
    public partial class ViewerForm1 : XtraForm {
        bool isSlideShown = false;
        int index = 0;
        Timer slideShowTimer = new Timer() {
            Interval = 5000
        };

        public ViewerForm1() {
            InitializeComponent();
            slideShowTimer.Tick += OnSlideShowTimerTick;
        }

        async void OnSlideShowTimerTick(object sender, EventArgs e) {
            var items = dashboardViewer1.Dashboard.Items;
            int maxIndex = items.Count - 1;

            if(!isSlideShown) {
                slideShowTimer.Stop();
                return;
            }
            await dashboardViewer1.MaximizeDashboardItemAsync(items[index].ComponentName);
            if(index == maxIndex)
                index = 0;
            else
                index++;
        }

        void OnStartClick(object sender, MouseEventArgs e) {
            if(!isSlideShown) {
                isSlideShown = true;
                slideShowTimer.Start();
            }
        }
        async void OnStopClick(object sender, EventArgs e) {
            isSlideShown = false;
            await dashboardViewer1.RestoreDashboardItemAsync();
        }
    }
}

VB.NET

Imports DevExpress.XtraEditors
Imports System
Imports System.Windows.Forms

Namespace MaximizeSlideShow
    Partial Public Class ViewerForm1
        Inherits XtraForm

        Private isSlideShown As Boolean = False
        Private index As Integer = 0
        Private slideShowTimer As New Timer() With {.Interval = 5000}

        Public Sub New()
            InitializeComponent()
            AddHandler slideShowTimer.Tick, AddressOf OnSlideShowTimerTick
        End Sub

        Private Async Sub OnSlideShowTimerTick(ByVal sender As Object, ByVal e As EventArgs)
            Dim items = dashboardViewer1.Dashboard.Items
            Dim maxIndex As Integer = items.Count - 1

            If Not isSlideShown Then
                slideShowTimer.Stop()
                Return
            End If
            Await dashboardViewer1.MaximizeDashboardItemAsync(items(index).ComponentName)
            If index = maxIndex Then
                index = 0
            Else
                index += 1
            End If
        End Sub

        Private Sub OnStartClick(ByVal sender As Object, ByVal e As MouseEventArgs) Handles simpleButton1.MouseClick
            If Not isSlideShown Then
                isSlideShown = True
                slideShowTimer.Start()
            End If
        End Sub
        Private Async Sub OnStopClick(ByVal sender As Object, ByVal e As EventArgs) Handles simpleButton2.Click
            isSlideShown = False
            Await dashboardViewer1.RestoreDashboardItemAsync()
        End Sub
    End Class
End Namespace