Weird draw location

General
1

This happens while I was refactoring my code and it goes well. Then I made my test using a Portrait image to be sure it works with the two orientations images: Portrait and Landscape.

The code below centers a landscape window. OK, why not. But, if I use a Portrait image, I also get the image centered.And this is normally not possible with a fixed X value and an image with a smaller width….

Same image, rotated and resized; one is 316 pixels width, the second is 920 pixels width.

Xojo 2021r1.1
Big Sur
MacBook Pro M1

Image.Graphics.DrawPicture Dart,52,Align_Y

I even use 0 instead of 52 and get the image centered.

I cleared Xojo Cache folder, quit Wojo and restart.

The only thing I do not do (yet) is to shutdown and reboot, then test again.

BTW: 52 is the correct value to center horizontally the Landscape image. I computed it manually (*). But the real code to be tested is one that compute by itself the value to center the image using the passed (I was suspicious, so I replaced Align_X with 52, then 0, and the image is still centered with the Portrait image !

Image is a fixed sized image. I computed the value to center horizontally the Dart image with a sheet of paper and pen.Old methods can be good methods.

Nota: I also have troubles with vertical alignments (Top, Center and Bottom). Center is correct, but the other two may vary.
Align_X and Align_Y are not Static nor Properties, only standard local variables; and this may be related…

2

Odd … but impossible to explain without any context. If one line of code appears to be correct the root of the issue is usually found somewhere else.

3

image
Image. Dart Picture will be draw inside the green rectangle.

image
Dart 1

image
Dart 2

Dart 1 is 900 pixels wide (20 pixels less than the green image width) and the height is unknow.
Dart 2 is 600 pixels wide (50 pixels less than the gree image height) and the width is unknow.

Dart 1 and Dart 2 comes from the user and their size is unknow, but resized to 900 pixels wide (if Landscape) and 600 pixels tall (if Portrait).

In my test I draw Dart 1 and Dart 2 inside the Green area of Image.

Is it clear now ?

They were smaller in LibreOffice…

4

I fired Xojo / M1, minutes ago, and the Landscape image is draw at X=0; the Portrait image is not…

Also, Realbasic.Rect draw the window a bit too to the right of the monitor…

5

i would test the coords with dots or draw rectangle
and giving the images also a border and without alpha.
test without hidpi. test with last xojo release.

6

The Dart Picture (loaded from disk) do not have alpha).

Resolution does not matter as I load/draw in a Picture and DrawPicture that Picture.

There is no new than:
Xojo 2021r1.1
Big Sur 11.3
MacBook Pro M1

Now, while I was downloading a 7GB archive, I’ve followed the process more carefully and discovered that in Dart = Resize(f) module, I created a Picture that fills the whole allowed space (to center the image), and there is no room afterward for centering !

Thank you for the advices. More to refactor.

1 Like
7

okay. good that you found a trail.

my typical mistake is that the draw output is scaled into a area and have nothing to do with the original image size. as example .DrawPicture pic,0,0,g.Width,g.Height,0,0,pic.Width,pic.Height

8

Here’s an example result:

image