TreeViewDesigner.cs source code in C# .NET

Source code for the .NET framework in C#

                        

Code:

/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / Designer / WebForms / System / Web / UI / Design / WebControls / TreeViewDesigner.cs / 1 / TreeViewDesigner.cs

                            //------------------------------------------------------------------------------ 
/// 
///    Copyright (c) Microsoft Corporation. All Rights Reserved.
///    Information Contained Herein is Proprietary and Confidential.
///  
//-----------------------------------------------------------------------------
 
namespace System.Web.UI.Design.WebControls { 

    using System; 
    using System.Collections;
    using System.ComponentModel;
    using System.ComponentModel.Design;
    using System.Data; 
    using System.Design;
    using System.Diagnostics; 
    using System.Drawing; 
    using System.Globalization;
    using System.IO; 
    using System.Runtime.InteropServices;
    using System.Text;
    using System.Web.UI;
    using System.Web.UI.Design; 
    using System.Web.UI.Design.Util;
    using System.Web.UI.WebControls; 
    using System.Windows.Forms; 

    using WebTreeView = System.Web.UI.WebControls.TreeView; 


    /// 
    ///  
    /// The designer for a TreeView control.
    ///  
    public class TreeViewDesigner : HierarchicalDataBoundControlDesigner { 

        private WebTreeView _treeView; 

        private bool _usingSampleData;
        private bool _emptyDataBinding;
 
        private static DesignerAutoFormatCollection _autoFormats;
 
        private const string emptyDesignTimeHtml = 
            @"
                
TreeView - {0}
{1}
"; private const string errorDesignTimeHtml = @"
TreeView - {0}
{1}
"; /// public override DesignerActionListCollection ActionLists { get { DesignerActionListCollection actionLists = new DesignerActionListCollection(); actionLists.AddRange(base.ActionLists); actionLists.Add(new TreeViewDesignerActionList(this)); return actionLists; } } public override DesignerAutoFormatCollection AutoFormats { get { if (_autoFormats == null) { _autoFormats = CreateAutoFormats(AutoFormatSchemes.TREEVIEW_SCHEMES, delegate(DataRow schemeData) { return new BaseAutoFormat(schemeData); }); } return _autoFormats; } } protected override bool UsePreviewControl { get { return true; } } /// /// Creates and shows a new line image generator. /// protected void CreateLineImages() { InvokeTransactedChange(Component, new TransactedChangeCallback(CreateLineImagesCallBack), null, SR.GetString(SR.TreeViewDesigner_CreateLineImagesTransactionDescription)); } private bool CreateLineImagesCallBack(object context) { TreeViewImageGenerator generator = new TreeViewImageGenerator(_treeView); return (UIServiceHelper.ShowDialog(Component.Site, generator) == DialogResult.OK); } /// protected override void DataBind(BaseDataBoundControl dataBoundControl) { WebTreeView treeView = (WebTreeView)dataBoundControl; _usingSampleData = false; _emptyDataBinding = false; if ((treeView.DataSourceID != null && treeView.DataSourceID.Length > 0) || treeView.DataSource != null || treeView.Nodes.Count == 0) { treeView.Nodes.Clear(); base.DataBind(treeView); } if (_usingSampleData) { treeView.ExpandAll(); } else { ExpandToDepth(treeView.Nodes, treeView.ExpandDepth); if (treeView.Nodes.Count == 0) { _emptyDataBinding = true; } } } protected void EditBindings() { IServiceProvider site = _treeView.Site; TreeViewBindingsEditorForm dialog = new TreeViewBindingsEditorForm(site, _treeView, this); UIServiceHelper.ShowDialog(site, dialog); } /// /// Creates and shows a new node collection editor. /// protected void EditNodes() { PropertyDescriptor descriptor = TypeDescriptor.GetProperties(Component)["Nodes"]; Debug.Assert(descriptor != null, "Expected to find Nodes property on TreeView"); InvokeTransactedChange(Component, new TransactedChangeCallback(EditNodesChangeCallback), null, SR.GetString(SR.TreeViewDesigner_EditNodesTransactionDescription), descriptor); } /// /// Transacted change callback to invoke the Edit Nodes dialog. /// private bool EditNodesChangeCallback(object context) { IServiceProvider site = _treeView.Site; TreeNodeCollectionEditorDialog dialog = new TreeNodeCollectionEditorDialog(_treeView, this); DialogResult result = UIServiceHelper.ShowDialog(site, dialog); return (result == DialogResult.OK); } private void ExpandToDepth(System.Web.UI.WebControls.TreeNodeCollection nodes, int depth) { foreach (System.Web.UI.WebControls.TreeNode node in nodes) { if ((node.Expanded != false) && ((depth == -1) || (node.Depth < depth))) { node.Expanded = true; ExpandToDepth(node.ChildNodes, depth); } } } /// protected override IHierarchicalEnumerable GetSampleDataSource() { _usingSampleData = true; ((WebTreeView)ViewControl).AutoGenerateDataBindings = true; return base.GetSampleDataSource(); } /// public override string GetDesignTimeHtml() { // Save the HTML temporarily string designTimeHtml = base.GetDesignTimeHtml(); if (_emptyDataBinding) { designTimeHtml = GetEmptyDataBindingDesignTimeHtml(); } return designTimeHtml; } private string GetEmptyDataBindingDesignTimeHtml() { string name = _treeView.Site.Name; return String.Format(CultureInfo.CurrentUICulture, emptyDesignTimeHtml, name, SR.GetString(SR.TreeViewDesigner_EmptyDataBinding)); } /// protected override string GetEmptyDesignTimeHtml() { string name = _treeView.Site.Name; return String.Format(CultureInfo.CurrentUICulture, emptyDesignTimeHtml, name, SR.GetString(SR.TreeViewDesigner_Empty)); } /// protected override string GetErrorDesignTimeHtml(Exception e) { string name = _treeView.Site.Name; return String.Format(CultureInfo.CurrentUICulture, errorDesignTimeHtml, name, SR.GetString(SR.TreeViewDesigner_Error, e.Message)); } /// public override void Initialize(IComponent component) { VerifyInitializeArgument(component, typeof(WebTreeView)); base.Initialize(component); _treeView = (WebTreeView)component; } internal void InvokeTreeNodeCollectionEditor() { EditNodes(); } internal void InvokeTreeViewBindingsEditor() { EditBindings(); } private class TreeViewDesignerActionList : DesignerActionList { private TreeViewDesigner _parent; public TreeViewDesignerActionList(TreeViewDesigner parent) : base (parent.Component) { _parent = parent; } public override bool AutoShow { get { return true; } set { } } public bool ShowLines { get { return ((WebTreeView)Component).ShowLines; } set { PropertyDescriptor propDesc = TypeDescriptor.GetProperties(typeof(WebTreeView))["ShowLines"]; propDesc.SetValue(Component, value); TypeDescriptor.Refresh(Component); } } public void CreateLineImages() { _parent.CreateLineImages(); } public void EditBindings() { _parent.EditBindings(); } public void EditNodes() { _parent.EditNodes(); } public override DesignerActionItemCollection GetSortedActionItems() { DesignerActionItemCollection items = new DesignerActionItemCollection(); string actionGroup = SR.GetString(SR.TreeViewDesigner_DataActionGroup); if (String.IsNullOrEmpty(_parent.DataSourceID)) { items.Add(new DesignerActionMethodItem(this, "EditNodes", SR.GetString(SR.TreeViewDesigner_EditNodes), actionGroup, SR.GetString(SR.TreeViewDesigner_EditNodesDescription), true)); } else { items.Add(new DesignerActionMethodItem(this, "EditBindings", SR.GetString(SR.TreeViewDesigner_EditBindings), actionGroup, SR.GetString(SR.TreeViewDesigner_EditBindingsDescription), true)); } if (ShowLines) { items.Add(new DesignerActionMethodItem(this, "CreateLineImages", SR.GetString(SR.TreeViewDesigner_CreateLineImages), actionGroup, SR.GetString(SR.TreeViewDesigner_CreateLineImagesDescription), true)); } items.Add(new DesignerActionPropertyItem("ShowLines", SR.GetString(SR.TreeViewDesigner_ShowLines), "Actions", SR.GetString(SR.TreeViewDesigner_ShowLinesDescription))); return items; } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.

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