Mega Code Archive
You can add your own Smart Tasks to a custom control by inheriting a new class from the base DesignerActionList class
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using System;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.Design;using System.ComponentModel;
using System.ComponentModel.Design;
namespace myControls
{
[Designer(typeof(SmartImageDesigner))]
public class SmartImage : WebControl
{
string _imageUrl;
string _alternateText;
int _rotation = 0;
bool _mirror = false;
public string ImageUrl
{
get { return _imageUrl; }
set { _imageUrl = value; }
}
public string AlternateText
{
get { return _alternateText; }
set { _alternateText = value; }
}
public int Rotation
{
get { return _rotation; }
set { _rotation = value; }
}
public bool Mirror
{
get { return _mirror; }
set { _mirror = value; }
}
protected override HtmlTextWriterTag TagKey
{
get
{
return HtmlTextWriterTag.Img;
}
} private string GetFilterString()
{
string _mirrorValue = "0";
if (_mirror)
_mirrorValue = "1";
return String.Format("progid:DXImageTransform.Microsoft. BasicImage(Rotation={0},Mirror={1})", _rotation, _mirrorValue);
}
protected override void AddAttributesToRender(HtmlTextWriter writer)
{
writer.AddStyleAttribute(HtmlTextWriterStyle.Filter, this. GetFilterString());
writer.AddAttribute(HtmlTextWriterAttribute.Src, _imageUrl);
writer.AddAttribute(HtmlTextWriterAttribute.Alt, _alternateText);
base.AddAttributesToRender(writer);
}
}
public class SmartImageDesigner : ControlDesigner
{
public override DesignerActionListCollection ActionLists
{
get
{
DesignerActionListCollection actionLists = new DesignerActionListCollection();
actionLists.AddRange(base.ActionLists);
actionLists.Add(new SmartImageActionList(this));
return actionLists;
}
}
}
public class SmartImageActionList : DesignerActionList
{
private DesignerActionItemCollection items;
private SmartImageDesigner _parent;
public SmartImageActionList(SmartImageDesigner parent)
: base(parent.Component) {
_parent = parent;
}
public void Rotate()
{
TransactedChangeCallback toCall = new TransactedChangeCallback(DoRotate);
ControlDesigner.InvokeTransactedChange(this.Component, toCall, "Rotate", "Rotate image 90 degrees");
}
public void Mirror()
{
TransactedChangeCallback toCall = new TransactedChangeCallback(DoMirror);
ControlDesigner.InvokeTransactedChange(this.Component, toCall, "Mirror", "Mirror Image");
}
public override DesignerActionItemCollection GetSortedActionItems()
{
if (items == null)
{
items = new DesignerActionItemCollection();
items.Add(new DesignerActionMethodItem(this, "Rotate", "Rotate Image", true));
items.Add(new DesignerActionMethodItem(this, "Mirror", "Mirror Image", true));
}
return items;
}
public bool DoRotate(object arg)
{
SmartImage img = (SmartImage)this.Component;
img.Rotation += 1;
if (img.Rotation > 3)
img.Rotation = 0;
_parent.UpdateDesignTimeHtml();
return true;
}
public bool DoMirror(object arg)
{
SmartImage img = (SmartImage)this.Component;
img.Mirror = !img.Mirror;
_parent.UpdateDesignTimeHtml();
return true;
}
}
}
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