Scale for ImageView

[alfcen]

If possible, I'd appreciate something like

ImageView1.Scale(x1,y1,x2,y2)

analogue to VB6. This would simplify drawing by eliminating need for scale factors.

 

[Erel]

By default ImageView uses Gravitiy.Fill and therefore scales the image automatically to fill its area.

 

[alfcen]

Right, Erel, but if you assign an ImageView to a canvas for drawing, then scaling would be helpful,
such as when you plot geo locations on a map with an ImageView scaled as
ImageView1.Scale(-180,90,180,-90).

 

[Erel]

Isn't it enough to use 'dip' units with all numeric parameters?

 

[alfcen]

Sorry, I doubt it, at least I do not know how this could work in analogy to the convenience of "Scale".
Anyway, it's not that a crucial issue. I am always looking for means that help shorten und simplify source codes.

 

[klaus]

I'm afraid that you don't speek of the same kind of scaling.
dip scales the objects on the screen.
alfcen means having a physical scale for the pixels.
Having an ImageView of 100dip by 100dip.
Setting ImageView.Scale((-180,90,180,-90)
means that the x value of pixel(0,0)=-180 and the y value = 90
and the x value of pixel(99dip,99dip)=180 and the y value = -90

I remeber having used the ScaleMode feature in VB6 too.
Height/Width 100 pixels
ScaleHeight= 180 ScaleWidth=360, physical unit

I hope this clarifies a bit the question.

Best regards.

 

[alfcen]

Thanks a lot for monitoring this thread and for your help, Klaus.

Setting ImageView.Scale((-180,90,180,-90)
means that the x value of pixel(0,0)=-180 and the y value = 90
and the x value of pixel(99dip,99dip)=180 and the y value = -90

That is exactly what I was trying to say, sorry for insufficient details.
'Scale' as quoted above, would help plot geo coords with a minimum of code.

Only if this would not be too much of trouble.

 

[Erel]

So if I understand you want to change the coordinates scale (and also the origin position)?

I guess that you can create a sub that will translate those coordinates for you.

 

[alfcen]

Fair enough, but additional code is exactly what I like avoid.