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image of cursor [message #3642]

Sat, 10 June 2006 10:41

andrei-catalin
Messages: 62
Registered: May 2006
Location: Romania

Member

I'd like to change the image of cursor when the mouse is over a distinct control (a Picture, in my case).
What would be a way to make this?

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Re: image of cursor [message #3644 is a reply to message #3642]

Sat, 10 June 2006 12:12

fudadmin
Messages: 1321
Registered: November 2005
Location: Kaunas, Lithuania

Ultimate Contributor
Administrator

Something like this:

Image MyCtrl::CursorImage(Point p, dword keyflags)
{
	Point p1=Point(0,50);
	Point p2=Point(200,60);
///	if (p.x>p1.x && p.x<p2.x && p.y>p1.y && p.y<p2.y)
///	return CtrlImg::vertpos1();
//		SetMouseCursor(CtrlImg::vertpos1());
	//	PromptOK("inside");

///	else return Image::Arrow();
	return Image::Arrow();
}

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Re: image of cursor [message #3646 is a reply to message #3644]

Sat, 10 June 2006 14:33

andrei-catalin
Messages: 62
Registered: May 2006
Location: Romania

Member

The code goes well. Smile

Thank you very much!

Andrei

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Re: image of cursor [message #3649 is a reply to message #3644]

Sun, 11 June 2006 20:53

mirek
Messages: 14256
Registered: November 2005

Ultimate Member

fudadmin wrote on Sat, 10 June 2006 06:12

Something like this:

Image MyCtrl::CursorImage(Point p, dword keyflags)
{
	Point p1=Point(0,50);
	Point p2=Point(200,60);
///	if (p.x>p1.x && p.x<p2.x && p.y>p1.y && p.y<p2.y)
///	return CtrlImg::vertpos1();
//		SetMouseCursor(CtrlImg::vertpos1());
	//	PromptOK("inside");

///	else return Image::Arrow();
	return Image::Arrow();
}

Well, with those commented out lines, not quite a representative example... Wink

To original poster: Just return the Image you want from the CursorImage overload..

Mirek

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Re: image of cursor [message #6123 is a reply to message #3649]

Tue, 31 October 2006 16:34

James Thomas
Messages: 26
Registered: June 2006

Promising Member

I'm also having a problem with setting my cursor image and I thought I'd post here to save a thread.

I have overriden Ctrl::CursorImage to return my own custom image (loaded from a .GIF) and it replaces the cursor. The problem is that it doesn't get drawn at the position of the cursor but some distance below it. It appears to me as if it is drawn at the bottom of where the default Image::Arrow() cursor is normally drawn.

Any ideas to fix this?

Note: fudadmin's code above no longer works (I assume it did when he posted it) as Ctrl::SetMouseCursor is now a private member of Ctrl and cannot be called directly.

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Re: image of cursor [message #6124 is a reply to message #6123]

Tue, 31 October 2006 17:09

mirek
Messages: 14256
Registered: November 2005

Ultimate Member

Looks like some hotspot problem.

Hotspot is a reference point in Image which defines the "mouse posisition". For regular arrow, it is [0, 0], but can be generally any point in the image.

Default value is [0, 0]. You can define hotspot position in Image designer (actually, dev versions of u++ have TWO hotspots now, HotSpot and "2ndSpot", but second hotspot is no used here Wink

Mirek

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Re: image of cursor [message #6168 is a reply to message #6124]

Wed, 01 November 2006 13:07

James Thomas
Messages: 26
Registered: June 2006

Promising Member

Thanks, that was the problem. For some reason all my Images have been loaded with hotspots at (0,-cy), but I have no idea why.

I think I missed this because the Image class doesn't have a SetHotSpot member (presumably because it's held in ImageBuffer and data->buffer could be NULL), and the only way I can find of setting a new hotspot is:

ImageBuffer ib;
Image img;

// Load an image here

ib = img;
ib.SetHotSpot(Point(0,0));
img = ib;

As far as I can tell this won't actually do any deep copying, but is it really the best way?

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