350 lines
12 KiB
C#
350 lines
12 KiB
C#
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//------------------------------------------------------------------------------
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// <copyright file="TreeNode.cs" company="Microsoft">
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// </copyright>
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//------------------------------------------------------------------------------
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namespace System.Web.UI.WebControls {
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using System.ComponentModel;
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using System.Drawing;
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using System.Drawing.Design;
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using System.Globalization;
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using System.Text;
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using System.Web.UI;
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/// <devdoc>
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/// Specifies the style of a TreeNode.
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/// </devdoc>
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public sealed class TreeNodeStyle : Style {
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private const int PROP_VPADDING = 0x00010000;
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private const int PROP_HPADDING = 0x00020000;
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private const int PROP_NODESPACING = 0x00040000;
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private const int PROP_CHILDNODESPADDING = 0x00080000;
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private const int PROP_IMAGEURL = 0x00100000;
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private HyperLinkStyle _hyperLinkStyle;
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public TreeNodeStyle() : base() {
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}
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public TreeNodeStyle(StateBag bag) : base(bag) {
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}
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/// <devdoc>
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/// Gets and sets the vertical spacing between the node and its child nodes
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/// </devdoc>
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[
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DefaultValue(typeof(Unit), ""),
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WebSysDescription(SR.TreeNodeStyle_ChildNodesPadding),
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WebCategory("Layout"),
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NotifyParentProperty(true)
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]
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public Unit ChildNodesPadding {
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get {
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if (IsSet(PROP_CHILDNODESPADDING)) {
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return (Unit)(ViewState["ChildNodesPadding"]);
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}
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return Unit.Empty;
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}
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set {
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if ((value.Type == UnitType.Percentage) || (value.Value < 0)) {
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throw new ArgumentOutOfRangeException("value");
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}
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ViewState["ChildNodesPadding"] = value;
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SetBit(PROP_CHILDNODESPADDING);
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}
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}
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/// <devdoc>
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/// Gets and sets the horizontal padding around the node text
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/// </devdoc>
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[
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DefaultValue(typeof(Unit), ""),
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WebSysDescription(SR.TreeNodeStyle_HorizontalPadding),
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WebCategory("Layout"),
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NotifyParentProperty(true)
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]
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public Unit HorizontalPadding {
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get {
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if (IsSet(PROP_HPADDING)) {
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return (Unit)(ViewState["HorizontalPadding"]);
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}
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return Unit.Empty;
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}
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set {
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if ((value.Type == UnitType.Percentage) || (value.Value < 0)) {
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throw new ArgumentOutOfRangeException("value");
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}
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ViewState["HorizontalPadding"] = value;
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SetBit(PROP_HPADDING);
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}
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}
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internal HyperLinkStyle HyperLinkStyle {
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get {
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if (_hyperLinkStyle == null) {
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_hyperLinkStyle = new HyperLinkStyle(this);
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}
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return _hyperLinkStyle;
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}
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}
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[DefaultValue("")]
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[Editor("System.Web.UI.Design.ImageUrlEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor))]
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[NotifyParentProperty(true)]
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[UrlProperty()]
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[WebCategory("Appearance")]
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[WebSysDescription(SR.TreeNodeStyle_ImageUrl)]
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public string ImageUrl {
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get {
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if (IsSet(PROP_IMAGEURL)) {
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return (string)(ViewState["ImageUrl"]);
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}
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return String.Empty;
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}
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set {
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if (value == null) {
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throw new ArgumentNullException("value");
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}
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ViewState["ImageUrl"] = value;
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SetBit(PROP_IMAGEURL);
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}
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}
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/// <devdoc>
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/// Gets and sets the vertical spacing between nodes
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/// </devdoc>
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[
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DefaultValue(typeof(Unit), ""),
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WebSysDescription(SR.TreeNodeStyle_NodeSpacing),
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WebCategory("Layout"),
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NotifyParentProperty(true)
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]
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public Unit NodeSpacing {
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get {
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if (IsSet(PROP_NODESPACING)) {
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return (Unit)(ViewState["NodeSpacing"]);
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}
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return Unit.Empty;
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}
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set {
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if ((value.Type == UnitType.Percentage) || (value.Value < 0)) {
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throw new ArgumentOutOfRangeException("value");
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}
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ViewState["NodeSpacing"] = value;
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SetBit(PROP_NODESPACING);
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}
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}
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/// <devdoc>
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/// Gets and sets the vertical padding around the node text
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/// </devdoc>
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[
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DefaultValue(typeof(Unit), ""),
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WebSysDescription(SR.TreeNodeStyle_VerticalPadding),
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WebCategory("Layout"),
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NotifyParentProperty(true)
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]
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public Unit VerticalPadding {
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get {
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if (IsSet(PROP_VPADDING)) {
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return (Unit)(ViewState["VerticalPadding"]);
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}
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return Unit.Empty;
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}
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set {
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if ((value.Type == UnitType.Percentage) || (value.Value < 0)) {
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throw new ArgumentOutOfRangeException("value");
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}
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ViewState["VerticalPadding"] = value;
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SetBit(PROP_VPADDING);
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}
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}
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/// <devdoc>
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/// Copies non-blank elements from the specified style, overwriting existing
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/// style elements if necessary.
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/// </devdoc>
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public override void CopyFrom(Style s) {
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if (s != null) {
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base.CopyFrom(s);
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TreeNodeStyle tns = s as TreeNodeStyle;
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if (tns != null && !tns.IsEmpty) {
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// Only copy the paddings if they aren't in the source Style's registered CSS class
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if (s.RegisteredCssClass.Length != 0) {
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if (tns.IsSet(PROP_VPADDING)) {
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ViewState.Remove("VerticalPadding");
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ClearBit(PROP_VPADDING);
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}
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if (tns.IsSet(PROP_HPADDING)) {
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ViewState.Remove("HorizontalPadding");
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ClearBit(PROP_HPADDING);
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}
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}
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else {
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if (tns.IsSet(PROP_VPADDING)) {
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this.VerticalPadding = tns.VerticalPadding;
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}
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if (tns.IsSet(PROP_HPADDING)) {
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this.HorizontalPadding = tns.HorizontalPadding;
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}
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}
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if (tns.IsSet(PROP_NODESPACING)) {
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this.NodeSpacing = tns.NodeSpacing;
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}
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if (tns.IsSet(PROP_CHILDNODESPADDING)) {
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this.ChildNodesPadding = tns.ChildNodesPadding;
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}
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if (tns.IsSet(PROP_IMAGEURL)) {
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this.ImageUrl = tns.ImageUrl;
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}
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}
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}
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}
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protected override void FillStyleAttributes(CssStyleCollection attributes, IUrlResolutionService urlResolver) {
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// The main style will be rendered on the container element, that does not contain the text.
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// The Hyperlink style will render the text styles
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// Copying the code from the base class, except for the part that deals with Font and ForeColor.
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StateBag viewState = ViewState;
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Color c;
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// BackColor
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if (IsSet(PROP_BACKCOLOR)) {
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c = (Color)viewState["BackColor"];
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if (!c.IsEmpty) {
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attributes.Add(HtmlTextWriterStyle.BackgroundColor, ColorTranslator.ToHtml(c));
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}
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}
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// BorderColor
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if (IsSet(PROP_BORDERCOLOR)) {
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c = (Color)viewState["BorderColor"];
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if (!c.IsEmpty) {
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attributes.Add(HtmlTextWriterStyle.BorderColor, ColorTranslator.ToHtml(c));
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}
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}
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BorderStyle bs = this.BorderStyle;
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Unit bu = this.BorderWidth;
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if (!bu.IsEmpty) {
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attributes.Add(HtmlTextWriterStyle.BorderWidth, bu.ToString(CultureInfo.InvariantCulture));
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if (bs == BorderStyle.NotSet) {
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if (bu.Value != 0.0) {
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attributes.Add(HtmlTextWriterStyle.BorderStyle, "solid");
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}
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}
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else {
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attributes.Add(HtmlTextWriterStyle.BorderStyle, borderStyles[(int)bs]);
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}
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}
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else {
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if (bs != BorderStyle.NotSet) {
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attributes.Add(HtmlTextWriterStyle.BorderStyle, borderStyles[(int)bs]);
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}
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}
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Unit u;
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// Height
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if (IsSet(PROP_HEIGHT)) {
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u = (Unit)viewState["Height"];
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if (!u.IsEmpty) {
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attributes.Add(HtmlTextWriterStyle.Height, u.ToString(CultureInfo.InvariantCulture));
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}
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}
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// Width
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if (IsSet(PROP_WIDTH)) {
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u = (Unit)viewState["Width"];
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if (!u.IsEmpty) {
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attributes.Add(HtmlTextWriterStyle.Width, u.ToString(CultureInfo.InvariantCulture));
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}
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}
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if (!HorizontalPadding.IsEmpty || !VerticalPadding.IsEmpty) {
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attributes.Add(HtmlTextWriterStyle.Padding, string.Format(CultureInfo.InvariantCulture,
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"{0} {1} {0} {1}",
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VerticalPadding.IsEmpty ? Unit.Pixel(0) : VerticalPadding,
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HorizontalPadding.IsEmpty ? Unit.Pixel(0) : HorizontalPadding));
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}
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}
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/// <devdoc>
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/// Copies non-blank elements from the specified style, but will not overwrite
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/// any existing style elements.
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/// </devdoc>
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public override void MergeWith(Style s) {
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if (s != null) {
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if (IsEmpty) {
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// Merging with an empty style is equivalent to copying,
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// which is more efficient.
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CopyFrom(s);
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return;
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}
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base.MergeWith(s);
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TreeNodeStyle tns = s as TreeNodeStyle;
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if (tns != null && !tns.IsEmpty) {
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// Since we're already copying the registered CSS class in base.MergeWith, we don't
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// need to any attributes that would be included in that class.
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if (s.RegisteredCssClass.Length == 0) {
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if (tns.IsSet(PROP_VPADDING) && !this.IsSet(PROP_VPADDING)) {
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this.VerticalPadding = tns.VerticalPadding;
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}
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if (tns.IsSet(PROP_HPADDING) && !this.IsSet(PROP_HPADDING)) {
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this.HorizontalPadding = tns.HorizontalPadding;
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}
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}
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if (tns.IsSet(PROP_NODESPACING) && !this.IsSet(PROP_NODESPACING)) {
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this.NodeSpacing = tns.NodeSpacing;
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}
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if (tns.IsSet(PROP_CHILDNODESPADDING) && !this.IsSet(PROP_CHILDNODESPADDING)) {
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this.ChildNodesPadding = tns.ChildNodesPadding;
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}
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if (tns.IsSet(PROP_IMAGEURL) && !this.IsSet(PROP_IMAGEURL)) {
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this.ImageUrl = tns.ImageUrl;
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}
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}
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}
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}
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/// <devdoc>
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/// Clears out any defined style elements from the state bag.
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/// </devdoc>
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public override void Reset() {
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if (IsSet(PROP_VPADDING))
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ViewState.Remove("VerticalPadding");
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if (IsSet(PROP_HPADDING))
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ViewState.Remove("HorizontalPadding");
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if (IsSet(PROP_NODESPACING))
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ViewState.Remove("NodeSpacing");
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if (IsSet(PROP_CHILDNODESPADDING))
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ViewState.Remove("ChildNodesPadding");
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ResetCachedStyles();
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base.Reset();
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}
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internal void ResetCachedStyles() {
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_hyperLinkStyle = null;
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}
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}
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}
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