[Cuis-dev] tiled background image

[Juan Vuletich]

On 10/1/2024 8:04 PM, Mark Volkmann via Cuis-dev wrote:
> In the current code the WorldMorph drawOn: method sends
> aCanvas image: backgroundImage at: `0 at 0`
> if backgroundImage is set.
> That can be set with code like the following:
>
> filePath := '/Users/volkmannm/Pictures/images/altitude1600.jpg'.
> byteArray := (filePath asFileEntry readStream) binary 
> contentsOfEntireFile.
> self runningWorld backgroundImageData: byteArray.
>
> The backgroundImageData: method is defined in PasteUpMorph which is 
> the superclass of WorldMorph.
> That method sends #buildMagnifiedBackgroundImage to self.
> That method contains this line:
>
> backgroundImage := image magnifyTo: extent.
>
> That stretches the image to fit the size of the WorldMorph which is 
> the size of the whole window.
> It does not maintain the aspect ratio of the image.
>
> That seems fine for images that are patterns, but not for images that 
> contain recognizable things like people, animals, buildings, cars, ...
>
> I think it would be great to have three options for how a background 
> image is used,
> 1) stretch as is done currently
> 2) change size to cover WorldMorph without changing the aspect ratio 
> (right or bottom of image could be cut off)
> 3) tile the image over the window
>
> I have learned how to modify WorldMorph and PasteUpMorph to tile the 
> image and the cover option wouldn't be difficult to implement.
> If I were to submit a change set that modifies WorldMorph and 
> PasteMorph to support all three options, would it be considered?

Yes!

Cheers,

>
>
> On Mon, Sep 30, 2024 at 8:23 PM Juan Vuletich <juan at cuis.st 
> <mailto:juan at cuis.st>> wrote:
>
>     On 9/30/2024 8:21 PM, Mark Volkmann via Cuis-dev wrote:
>>     I see the Squeak has the class BackgroundMorph that supports
>>     tiling an image over the World background, but that class is not
>>     in Cuis. Is there another way to tile an image over the World
>>     background that is in the base Cuis image?
>>
>>     -- 
>>     R. Mark Volkmann
>>     Object Computing, Inc.
>
>     Yes. You need to create your own morph, and in its #drawOn: method
>     do whatever you need. You can also modify WorldMorph so it tiles.
>     Go Smalltalk go!
>
>     Cheers,
>
>     -- 
>     Juan Vuletich
>     cuis.st  <http://cuis.st>
>     github.com/jvuletich  <http://github.com/jvuletich>
>     researchgate.net/profile/Juan-Vuletich  <http://researchgate.net/profile/Juan-Vuletich>
>     independent.academia.edu/JuanVuletich  <http://independent.academia.edu/JuanVuletich>
>     patents.justia.com/inventor/juan-manuel-vuletich  <http://patents.justia.com/inventor/juan-manuel-vuletich>
>     linkedin.com/in/juan-vuletich-75611b3  <http://linkedin.com/in/juan-vuletich-75611b3>
>     twitter.com/JuanVuletich  <http://twitter.com/JuanVuletich>
>
>
>
> -- 
> R. Mark Volkmann
> Object Computing, Inc.


-- 
Juan Vuletich
cuis.st
github.com/jvuletich
researchgate.net/profile/Juan-Vuletich
independent.academia.edu/JuanVuletich
patents.justia.com/inventor/juan-manuel-vuletich
linkedin.com/in/juan-vuletich-75611b3
twitter.com/JuanVuletich

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.cuis.st/mailman/archives/cuis-dev/attachments/20241001/e1473585/attachment-0001.htm>