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DashboardLayoutItem Class

dashboard-devexpress-dot-dashboardcommon-f3bc5c27.md

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DashboardLayoutItem Class

Represents a layout item that displays a dashboard item.

Namespace : DevExpress.DashboardCommon

Assembly : DevExpress.Dashboard.v25.2.Core.dll

NuGet Package : DevExpress.Dashboard.Core

Declaration

csharp
public class DashboardLayoutItem :
    DashboardLayoutNode
vb
Public Class DashboardLayoutItem
    Inherits DashboardLayoutNode

The following members return DashboardLayoutItem objects:

Remarks

To display a dashboard item within a layout item, pass the DashboardItem descendant to the DashboardLayoutItem constructor.

The DashboardLayoutNode.Weight property allows you to specify the relative size of the created layout item.

Example

This example constructs the layout of a sample dashboard that contains the following items:

The Dashboard.LoadFromXml method loads a sample dashboard.

The following steps are taken to create a new layout:

  1. Create DashboardLayoutItem objects to display the existing dashboard items and DashboardLayoutGroup object to display a dashboard group. The weight parameter specifies the layout item’s relative size in a group.
  2. Create DashboardLayoutGroup objects to organize items which do not belong to a dashboard group item. Add layout items as child nodes to form a layout tree.
  3. Create a root group - a new DashboardLayoutGroup object whose DashboardLayoutGroup.DashboardItem property is null. Add the layout tree nodes to the root as its child nodes.
  4. Assign the root group to the Dashboard.LayoutRoot property.

View Example: How to modify dashboard layout in code

csharp
using System;
using System.Linq;
using DevExpress.XtraEditors;
using DevExpress.DashboardCommon;
using DevExpress.DashboardWin;
using System.IO;

namespace Dashboard_LayoutCustomization
{
    public partial class Form1 : XtraForm
    {
        public Form1()
        {
            InitializeComponent();
            dashboardViewer1.CustomizeDashboardTitle += DashboardViewer1_CustomizeDashboardTitle;
            dashboardViewer1.LoadDashboard(@"Data\LayoutUnordered.xml");
        }

        private void ChangeLayout(DashboardToolbarItemClickEventArgs args)
        {
            Dashboard dashboard = new Dashboard();
            dashboard.LoadFromXml(@"Data\LayoutUnordered.xml");
            dashboard.BeginUpdate();
            // Switch off the DateFilter item's AutoHeight arrangement mode so that the DateFilter layout does not ignore its layout weight.
            ((DateFilterDashboardItem)(dashboard.Items["dateFilterDashboardItem1"])).ArrangementMode = DateFilterArrangementMode.Horizontal;
            // Hide captions.
            dashboard.Items.ForEach(item => item.ShowCaption = false);
            dashboard.Groups.ForEach(item => item.ShowCaption = false);
            // Create layout items for the DateFilter and Chart dashboard items.
            DashboardLayoutItem dateFilterLayoutItem = new DashboardLayoutItem(dashboard.Items["dateFilterDashboardItem1"], 13);
            DashboardLayoutItem chartLayoutItem = new DashboardLayoutItem(dashboard.Items["chartDashboardItem1"], 87);
            // Create a layout item for the dashboard Group item.
            DashboardLayoutGroup groupLayoutItem = new DashboardLayoutGroup()
            {
                Orientation = DashboardLayoutGroupOrientation.Vertical,
                DashboardItem = dashboard.Groups["dashboardItemGroup1"],
                Weight = 70
            };
            // Connect layout items in the layout tree.
            groupLayoutItem.ChildNodes.AddRange(dateFilterLayoutItem, chartLayoutItem);
            // Create a Grid layout item.
            DashboardLayoutItem gridLayoutItem = new DashboardLayoutItem(dashboard.Items["gridDashboardItem1"], 30);
            // Create a group layout item to organize the Grid layout item and a Dashboard Group layout item.
            DashboardLayoutGroup layoutGroup = new DashboardLayoutGroup(DashboardLayoutGroupOrientation.Horizontal, 85);
            // Connect layout items in the layout tree.
            layoutGroup.ChildNodes.AddRange(gridLayoutItem, groupLayoutItem);
            // Create a RangeFilter layout item.
            DashboardLayoutItem rangeFilterLayoutItem = new DashboardLayoutItem(dashboard.Items["rangeFilterDashboardItem1"], 15);            
            // Create a root layout group. Its DashboardItem property is null.
            DashboardLayoutGroup rootGroup = new DashboardLayoutGroup()
            {
                Orientation = DashboardLayoutGroupOrientation.Vertical,
                Weight = 100,
                DashboardItem = null
            };
            // Connect layout items in the layout tree. 
            rootGroup.ChildNodes.AddRange(layoutGroup, rangeFilterLayoutItem);
            // The layout treee is built. Set the dashboard's root layout node to finalize the layout.
            dashboard.LayoutRoot = rootGroup;
            dashboard.EndUpdate();

            dashboardViewer1.Dashboard = dashboard;
        }

        private void RepositionItems(DashboardToolbarItemClickEventArgs args)
        {
            Dashboard dashboard = dashboardViewer1.Dashboard;
            DashboardLayoutGroup rootGroup = dashboard.LayoutRoot.ChildNodes[0] as DashboardLayoutGroup;
            if ((rootGroup != null) && (rootGroup.ChildNodes.Count > 1))
                rootGroup.ChildNodes[0].MoveRight(rootGroup.ChildNodes[1]);
        }

        private void SaveLayoutToFile(DashboardToolbarItemClickEventArgs args)
        {
            dashboardViewer1.SaveDashboardLayout("DashboardLayout.xml");
        }

        private void LoadLayoutFromFile(DashboardToolbarItemClickEventArgs obj)
        {
            if (File.Exists("DashboardLayout.xml"))
                dashboardViewer1.LoadDashboardLayout("DashboardLayout.xml");
        }

        private void DashboardViewer1_CustomizeDashboardTitle(object sender, CustomizeDashboardTitleEventArgs e)
        {
            var exportItem = e.Items.FirstOrDefault(i => i.ButtonType == DashboardButtonType.Export);
            if (exportItem != null)
                e.Items.Remove(exportItem);
            DashboardToolbarItem btnChangeLayout = new DashboardToolbarItem();
            btnChangeLayout.Caption = "Change Layout";
            btnChangeLayout.ClickAction = new Action<DashboardToolbarItemClickEventArgs>(ChangeLayout);
            e.Items.Add(btnChangeLayout);
            DashboardToolbarItem btnRepositionItems = new DashboardToolbarItem();
            btnRepositionItems.Caption = "Reposition Items";
            btnRepositionItems.ClickAction = new Action<DashboardToolbarItemClickEventArgs>(RepositionItems);
            e.Items.Add(btnRepositionItems);
            DashboardToolbarItem btnSaveLayout = new DashboardToolbarItem();
            btnSaveLayout.Caption = "Save Layout to File";
            btnSaveLayout.ClickAction = new Action<DashboardToolbarItemClickEventArgs>(SaveLayoutToFile);
            e.Items.Add(btnSaveLayout);
            DashboardToolbarItem btnLoadLayout = new DashboardToolbarItem();
            btnLoadLayout.Caption = "Load Layout from File";
            btnLoadLayout.ClickAction = new Action<DashboardToolbarItemClickEventArgs>(LoadLayoutFromFile);
            e.Items.Add(btnLoadLayout);
        }
    }
}
vb
Imports System
Imports System.Linq
Imports DevExpress.XtraEditors
Imports DevExpress.DashboardCommon
Imports DevExpress.DashboardWin
Imports System.IO

Namespace Dashboard_LayoutCustomization
    Partial Public Class Form1
        Inherits XtraForm

        Public Sub New()
            InitializeComponent()
            AddHandler dashboardViewer1.CustomizeDashboardTitle, AddressOf DashboardViewer1_CustomizeDashboardTitle
            dashboardViewer1.LoadDashboard("Data\LayoutUnordered.xml")
        End Sub

        Private Sub ChangeLayout(ByVal args As DashboardToolbarItemClickEventArgs)
            Dim dashboard As New Dashboard()
            dashboard.LoadFromXml("Data\LayoutUnordered.xml")
            dashboard.BeginUpdate()
            ' Switch off the DateFilter item's AutoHeight arrangement mode so that the DateFilter layout does not ignore its layout weight.
            CType(dashboard.Items("dateFilterDashboardItem1"), DateFilterDashboardItem).ArrangementMode = DateFilterArrangementMode.Horizontal
            ' Hide captions.
            dashboard.Items.ForEach(Sub(item) item.ShowCaption = False)
            dashboard.Groups.ForEach(Sub(item) item.ShowCaption = False)
            ' Create layout items for the DateFilter and Chart dashboard items.
            Dim dateFilterLayoutItem As New DashboardLayoutItem(dashboard.Items("dateFilterDashboardItem1"), 13)
            Dim chartLayoutItem As New DashboardLayoutItem(dashboard.Items("chartDashboardItem1"), 87)
            ' Create a layout item for the dashboard Group item.
            Dim groupLayoutItem As New DashboardLayoutGroup() With {.Orientation = DashboardLayoutGroupOrientation.Vertical, .DashboardItem = dashboard.Groups("dashboardItemGroup1"), .Weight = 70}
            ' Connect layout items in the layout tree.
            groupLayoutItem.ChildNodes.AddRange(dateFilterLayoutItem, chartLayoutItem)
            ' Create a Grid layout item.
            Dim gridLayoutItem As New DashboardLayoutItem(dashboard.Items("gridDashboardItem1"), 30)
            ' Create a group layout item to organize the Grid layout item and a Dashboard Group layout item.
            Dim layoutGroup As New DashboardLayoutGroup(DashboardLayoutGroupOrientation.Horizontal, 85)
            ' Connect layout items in the layout tree.
            layoutGroup.ChildNodes.AddRange(gridLayoutItem, groupLayoutItem)
            ' Create a RangeFilter layout item.
            Dim rangeFilterLayoutItem As New DashboardLayoutItem(dashboard.Items("rangeFilterDashboardItem1"), 15)
            ' Create a root layout group. Its DashboardItem property is null.
            Dim rootGroup As New DashboardLayoutGroup() With {.Orientation = DashboardLayoutGroupOrientation.Vertical, .Weight = 100, .DashboardItem = Nothing}
            ' Connect layout items in the layout tree. 
            rootGroup.ChildNodes.AddRange(layoutGroup, rangeFilterLayoutItem)
            ' The layout treee is built. Set the dashboard's root layout node to finalize the layout.
            dashboard.LayoutRoot = rootGroup
            dashboard.EndUpdate()

            dashboardViewer1.Dashboard = dashboard
        End Sub

        Private Sub RepositionItems(ByVal args As DashboardToolbarItemClickEventArgs)
            Dim dashboard As Dashboard = dashboardViewer1.Dashboard
            Dim rootGroup As DashboardLayoutGroup = TryCast(dashboard.LayoutRoot.ChildNodes(0), DashboardLayoutGroup)
            If (rootGroup IsNot Nothing) AndAlso (rootGroup.ChildNodes.Count > 1) Then
                rootGroup.ChildNodes(0).MoveRight(rootGroup.ChildNodes(1))
            End If
        End Sub

        Private Sub SaveLayoutToFile(ByVal args As DashboardToolbarItemClickEventArgs)
            dashboardViewer1.SaveDashboardLayout("DashboardLayout.xml")
        End Sub

        Private Sub LoadLayoutFromFile(ByVal obj As DashboardToolbarItemClickEventArgs)
            If File.Exists("DashboardLayout.xml") Then
                dashboardViewer1.LoadDashboardLayout("DashboardLayout.xml")
            End If
        End Sub

        Private Sub DashboardViewer1_CustomizeDashboardTitle(ByVal sender As Object, ByVal e As CustomizeDashboardTitleEventArgs)
            Dim exportItem = e.Items.FirstOrDefault(Function(i) i.ButtonType = DashboardButtonType.Export)
            If exportItem IsNot Nothing Then
                e.Items.Remove(exportItem)
            End If
            Dim btnChangeLayout As New DashboardToolbarItem()
            btnChangeLayout.Caption = "Change Layout"
            btnChangeLayout.ClickAction = New Action(Of DashboardToolbarItemClickEventArgs)(AddressOf ChangeLayout)
            e.Items.Add(btnChangeLayout)
            Dim btnRepositionItems As New DashboardToolbarItem()
            btnRepositionItems.Caption = "Reposition Items"
            btnRepositionItems.ClickAction = New Action(Of DashboardToolbarItemClickEventArgs)(AddressOf RepositionItems)
            e.Items.Add(btnRepositionItems)
            Dim btnSaveLayout As New DashboardToolbarItem()
            btnSaveLayout.Caption = "Save Layout to File"
            btnSaveLayout.ClickAction = New Action(Of DashboardToolbarItemClickEventArgs)(AddressOf SaveLayoutToFile)
            e.Items.Add(btnSaveLayout)
            Dim btnLoadLayout As New DashboardToolbarItem()
            btnLoadLayout.Caption = "Load Layout from File"
            btnLoadLayout.ClickAction = New Action(Of DashboardToolbarItemClickEventArgs)(AddressOf LoadLayoutFromFile)
            e.Items.Add(btnLoadLayout)
        End Sub
    End Class
End Namespace

Inheritance

Object DashboardLayoutNode DashboardLayoutItem

See Also

DashboardLayoutItem Members

DevExpress.DashboardCommon Namespace