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