capture mouse click on HtmlInputImage on the server control - ng.asp-net-forum.windows-hosting_open_forum

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5 Items, 1 Pages 1 |< << Go >> >|

	sadji
	Asp.Net User

capture mouse click on HtmlInputImage on the server control

3/31/2004 2:01:57 PM

0/0

Hello,
i am doing a server control which use un HtmlInputImage, I am having problem on capturing mouse click event on the image.

1. is it possible to bubble event to my parent page( myPage.aspx) in order to catch the coords of my mouse click and invoke methode "onImgClick (e.X, e.Y) ? (the problem was the eventArgs dont have e.X and e.Y and couldnt get ImageClickEventArgs ... )

2. if bubbling is not possible, then i would like to call the methode "onImgClick" by delegeting it to the HtmlInputImage, how can i do this?

thanx,
s.

this is my control code: ( which is used by myPage.aspx)

// ctrl1.cs (simplified)
using System;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.ComponentModel;

namespace SrvCtrl
{
[DefaultProperty("Text"),
ToolboxData("<{0}:ctrl1 runat=server></{0}:ctrl1>")]
public class ctrl1 : System.Web.UI.WebControls.WebControl
{
private string text;

[Bindable(true),
Category("Appearance"),
DefaultValue("")]
public string Text
{ get { return text; }
set { text = value;}
}

protected override void Render(HtmlTextWriter output)
{
output.AddAttribute(HtmlTextWriterAttribute.Type, "image");
output.AddAttribute(HtmlTextWriterAttribute.Src, "http://mysite.com/pic.gif");
output.AddAttribute(HtmlTextWriterAttribute.Name, this.UniqueID);
output.RenderBeginTag(HtmlTextWriterTag.Input);
output.RenderEndTag();
output.Write(Text);
}

protected void onImgClick(int x, int y)
{
Text= "you clicked here "+ x.ToString() + ", " + y.ToString() ;
}

}
}

	joteke
	Asp.Net User

Re: capture mouse click on HtmlInputImage on the server control

3/31/2004 7:26:46 PM

0/0

Are you rewriting exactly what ImageButton already does (it can provide coords in its Click event)? Basically, you need to raise an event (probably Click event) from the Control in which you provide enough arguments (X and Y coords) so that subscriber gets what is needed. You would also need to parse those X and Y coordinates from postback data and to get into this data, you'd need to implement IPostBackDataHandler interface (where you might lead to raising a postback event).

This goes to the exact same implementation than ImageButton already has, so do you have the chance to straight inherit from ImageButton or are you doing this in studying sense?

Have you checked Justin Lovell's server control articles at AspAlliance? Here's a link to his profile where all articles are listed.

http://www.aspalliance.com/author.aspx?uId=38556

Thanks,

Teemu Keiski
Finland, EU

	master4eva
	Asp.Net User

Re: capture mouse click on HtmlInputImage on the server control

4/1/2004 4:30:06 AM

0/0

Technically speaking, the ImageButton does all the work that you need. All you need to do is re-use the control, if nescary. You can have a look at an article that I have already written over here:

http://aspalliance.com/350

-- Justin Lovell

	sadji
	Asp.Net User

Re: capture mouse click on HtmlInputImage on the server control

4/1/2004 7:47:09 AM

0/0

No i am not rewriting ImageButton, i've fail to use it correctly( it dosen't refresh) so that i use HtmlInputImage and was having problem on handling ImageClickEventArgs.
(raising Click event only gives me EventArgs not ImageClickEventArgs)

finally, i end up with using ImageButton correctly and fire up the correct event, with the help of Justin Lovell article which do smilier to my prog. http://aspalliance.com/articleViewer.aspx?aId=359&pId=4

thanx :)
Regards,
s.

	master4eva
	Asp.Net User

Re: capture mouse click on HtmlInputImage on the server control

4/1/2004 10:43:23 AM

0/0

Glad that you found your answer in one of my articles :-) .

-- Justin Lovell

5 Items, 1 Pages 1 |< << Go >> >|

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