/// <summary>
/// Adds the <strong>onchange</strong> attribute to invoke a callback from the client, then renders
/// the attributes of the control to the output stream.
/// </summary>
protected override void AddAttributesToRender(HtmlTextWriter writer)
{
if (AutoCallBack)
{
EventHandlerManager.AddScriptAttribute(
this,
"onchange",
EventHandlerManager.GetCallbackEventReference(
this,
this.CausesValidation,
this.ValidationGroup
)
);
}
base.AddAttributesToRender(writer);
}
/// <summary>
/// Adds the <strong>onclick</strong> attribute to invoke a callback from the client, then renders
/// the attributes of the control to the output stream.
/// </summary>
protected override void AddAttributesToRender(HtmlTextWriter writer)
{
base.AddAttributesToRender(writer);
if (this.DisplayMode == ASP.BulletedListDisplayMode.LinkButton)
{
for (int index = 0; index < this.Items.Count; index++)
{
ASP.ListItem item = this.Items[index];
EventHandlerManager.AddScriptAttribute(
this,
item,
"onclick",
EventHandlerManager.GetCallbackEventReference(
this,
index.ToString(),
this.CausesValidation,
this.ValidationGroup
) + "return false;"
);
}
}
}
/// <summary>
/// Adds the <strong>onclick</strong> attribute to each item to invoke a callback from the client,
/// then renders the item.
/// </summary>
protected override void RenderItem(ASP.ListItemType itemType, int repeatIndex, ASP.RepeatInfo repeatInfo, HtmlTextWriter writer)
{
if (AutoCallBack)
{
ASP.ListItem item = this.Items[repeatIndex];
if (item.Selected)
{
item.Attributes.Remove("onclick");
}
else
{
item.Attributes["onclick"] = EventHandlerManager.GetCallbackEventReference(
this,
repeatIndex.ToString(),
this.CausesValidation,
this.ValidationGroup
);
}
}
base.RenderItem(itemType, repeatIndex, repeatInfo, writer);
}
/// <summary>
/// Overrides the pretty useless ASP.NET 2.0 rendering of an ImageMap and replaces with a Anthem.NET capable (replaces the POST type maps) control that
/// is also fully XHTML compatible.
/// </summary>
/// <param name="writer"></param>
protected override void Render(HtmlTextWriter writer)
{
// Anthem preamble
if (!DesignMode)
{
AnthemNxt.Core.Manager.WriteBeginControlMarker(writer, "span", this);
}
if (Visible)
{
// Manually render the underlying image due to not being able to skip the base.Render imagemap implementation
RenderUnderlyingImage(writer);
// Only output if there is at least one hotspot
if (Enabled && !base.IsEnabled)
{
writer.AddAttribute(HtmlTextWriterAttribute.Disabled, "disabled");
}
if (HotSpots.Count > 0)
{
// Imagemap preamble, creating a new "sub" ID for the map which is referred to by the image
string id = "ImageMap" + this.ClientID;
writer.AddAttribute(HtmlTextWriterAttribute.Id, id);
writer.AddAttribute(HtmlTextWriterAttribute.Name, id);
writer.RenderBeginTag(HtmlTextWriterTag.Map);
int i = 0;
foreach (HotSpot spot in HotSpots)
{
writer.AddAttribute(HtmlTextWriterAttribute.Shape, GetHotSpotMarkupName(spot), false);
writer.AddAttribute(HtmlTextWriterAttribute.Coords, spot.GetCoordinates());
// What kind of hotspot is this? POST of course is now routed through Anthem.
switch (spot.HotSpotMode)
{
case HotSpotMode.NotSet: throw new NotSupportedException("HotSpotMode.NotSet not supported");
case HotSpotMode.PostBack:
if (Page != null)
{
Page.VerifyRenderingInServerForm(this);
}
// Registers the click to fire back via AJAX
writer.AddAttribute(HtmlTextWriterAttribute.Onclick,
EventHandlerManager.GetCallbackEventReference(
this, // Reference to this ICallbackControl
spot.PostBackValue, // The event argument
false, // Causes validation
string.Empty, // Validation group
string.Empty // Image during callback
));
// Added otherwise most browsers won't render the map with the correct mouse cursor
writer.AddAttribute(HtmlTextWriterAttribute.Href, "javascript:void(0);");
break;
case HotSpotMode.Navigate:
writer.AddAttribute(HtmlTextWriterAttribute.Href, ResolveClientUrl(spot.NavigateUrl));
if (spot.Target.Length > 0)
{
writer.AddAttribute(HtmlTextWriterAttribute.Target, spot.Target);
}
break;
case HotSpotMode.Inactive:
writer.AddAttribute("nohref", "true");
break;
}
// Add general hotspot attributes
writer.AddAttribute(HtmlTextWriterAttribute.Title, spot.AlternateText);
writer.AddAttribute(HtmlTextWriterAttribute.Alt, spot.AlternateText);
if (AccessKey.Length > 0)
{
writer.AddAttribute(HtmlTextWriterAttribute.Accesskey, AccessKey);
}
if (TabIndex != 0)
{
writer.AddAttribute(HtmlTextWriterAttribute.Tabindex, spot.TabIndex.ToString());
}
// Hotspot postamble
writer.RenderBeginTag(HtmlTextWriterTag.Area);
writer.RenderEndTag();
i++;
}
// Imagemap postamble
writer.RenderEndTag();
}
}
// Anthem postamble
if (!DesignMode)
{
AnthemNxt.Core.Manager.WriteEndControlMarker(writer, "span", this);
}
}