Question about DrawImage on Image

[DaveW]

Must be a simple newbie thing, but I have found that:

drawer.New1("form1",False)
drawer.DrawImage1(imagelist1.Item(0),rectsrc.Value,rectdst.Value,False)

works but

drawer.New2(image1,B4PObject(5))
drawer.DrawImage1(imagelist1.Item(0),rectsrc.Value,rectdst.Value,False)

does not. The second version gives an error "variable main.image1 was not assigned any value."

if I put

bmp.New2(100,100)
image1.Image = bmp.Value

before it, it does work. I don't understand that. Image1 is a control on the form, it's *there*, just like the form, so why does it have to be assigned a value? The need for image1.image = bmp.value seems to imply that Image1 is not an 'image' in it's own right, it is just a frame that can hold images.

Am I missing something or not understanding the situation?

 

[agraham]

The need for image1.image = bmp.value seems to imply that Image1 is not an 'image' in it's own right, it is just a frame that can hold images.

You've got it in one! The Image control is a visible container that draws bitmaps on the screen. The Drawer draws on bitmaps, not on the Image control. You can make a new Bitmap, draw on it and then assign it to an Image for display, you don't have to draw on it when it is in an Image control as a Bitmap exists in its own right.

 

[DaveW]

I hate when I am right :sign0148: I just wish it had not taken about 6 hours to work it out!

As always, thanks for the speedy and cheerful answer