Mr Andersson

Hi, I found this functionality worked really well but I cant get the on click functionality to work ? Any ideas why ?
 

Ian; Good point, thanks for mentioning! I guess you have to attach to the Click event on the parent Control and do some hit testing. The trick with the Paint event is to attach to the parent control's Paint and draw the image on the parent control's surface. I hope you find a solution that meet your needs.

Regards,
Johan
 

hi,

I have tried a number of things to get the occlick functionality working includign the attached examples

http://blogs.msdn.com/davidklinems/archive/2005/11/23/496552.aspx

Neither of which work.

Can you see any reason why this wouldnt work ?

I can post code if this makes it easier?

Many thanks
Ian
 

Hi Mr. Andersson,

Thanks for the great control. but there's something wrong with it Visible = false, click etc nothing works. Can you check it and tell us why? Especially the Visible attribute cause maybe u want to hide the picture and bring it back.

thanks
 

The control is hidden to allow the transparent background to work. So to get mouse events to work you need some fakery. Update AlphaImageControl as follows:

int downX, downY, upX, upY;

protected override void OnParentChanged(EventArgs e)
{
base.OnParentChanged(e);
// Hook on the paint event on the parent container
Parent.Paint += Parent_Paint;
//Because this control is hidden when the Image property is set we need to catch the parents mouse events
//and fake the ones for this control using translated coordinates.
Parent.Click += Parent_Click;
Parent.MouseUp += Parent_MouseUp;
Parent.MouseDown += Parent_MouseDown;
Parent.MouseMove += Parent_MouseMove;
}

void Parent_MouseDown(object sender, MouseEventArgs e)
{
downX = upX = e.X;
downY = upY = e.Y;
if (Bounds.Contains(e.X, e.Y))
OnMouseDown(new MouseEventArgs(e.Button,0,e.X - Bounds.X,e.Y -Bounds.Y,0));
}

void Parent_MouseUp(object sender, MouseEventArgs e)
{
upX = e.X;
upY = e.Y;
//if the mouse went down and up in this control generate a mouse up event for this control
if (Bounds.Contains(downX, downY) && Bounds.Contains(e.X, e.Y))
OnMouseUp(new MouseEventArgs(e.Button, 0, e.X - Bounds.X, e.Y - Bounds.Y,0));
}

void Parent_MouseMove(object sender, MouseEventArgs e)
{
//need to track the move because the click fires before the MouseUp
upX = e.X;
upY = e.Y;
//if the mouse went down in this control and the move is in it generate a mouse move event for this control
if (Bounds.Contains(downX, downY) && Bounds.Contains(e.X,e.Y))
OnMouseMove(new MouseEventArgs(e.Button, 0, e.X - Bounds.X, e.Y - Bounds.Y,0));
}

void Parent_Click(object sender, EventArgs e)
{
if (Bounds.Contains(downX, downY) && Bounds.Contains(upX, upY))
this.OnClick(e);
}
 

Thanks Indiekiduk for your solution on the problem with the click handler!

- Johan
 

indiekiduk = http://www.malcolmhall.com/ and http://www.aspecto-software.com/ ?
 

yes all those are me. And http://imalc.com
 

Hi, Mr Andersson.

I have a "little" question: how can i resize an AlphaImage? Or paraphrase: how to draw IBitmapImage? Idea: I think to go that way: call CreateBitmapFromImage which resize source IImage and get resized IBitmapImage. But HOW to Draw it?
Thanx for any solutions!

Regards, Edward
mailto:dasisgut@gmail.com
 

Hi Andersson

I am getting an error that goes like this
{"Unspecified error "},Error Code
-2147467259, COM Exception was unhandled , when I am trying to draw certain images using the imaging resource.

Can you please explain me where am I going wrong.

Thanks and regards
Subasish
 

I am getting an error that goes like this
{"Unspecified error "},Error Code
-2147467259, COM Exception was unhandled , when I am trying to draw certain images using the imaging resource.

Can you please explain me where am I going wrong.

Thanks
psspl
 

Hi,
Good control, but it does not work when placed over a Panel. Any Idea ?