Home » U++ Library support » U++ Library : Other (not classified elsewhere) » why not state oriented?
| why not state oriented? [message #19905] |
Sat, 31 January 2009 15:18  |
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amando1957
Messages: 57
Registered: November 2007
Location: Wien/Vienna/Viden
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Hi to all!
In the manual about Draw I've read the *state oriented* approach were not reality here, you devs will rather prefer args instead (alike with FileOut the put32le() etc.).
I always have considered the states less cumbersome, and it results in a less number of args.
I will often call the paintLine() a lot of times, but the lines are always blue and have 4 pixels, then I can surround a rect with the same one.
Setting a var of my class I have always a "current state", hardly to avoid.
At the Apple you set a pen you can use subsequent, until you set a new one again. The "graphics context", as they call it, is treatened similar. Thats basically like at WIN-GDI (though these two systems have obvious differences for devs).
At the Apple they are also not starters there, so it seems a question of taste.
What is the advantage of using args instead?
OK, I'm spared of calling set-get-functions all the time, thats one thing after all, so the one call will do in some cases.
Martin
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| Re: why not state oriented? [message #19914 is a reply to message #19905] |
Sun, 01 February 2009 18:42  |
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mirek
Messages: 13975
Registered: November 2005
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Ultimate Member |
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| amando1957 wrote on Sat, 31 January 2009 09:18 |
Hi to all!
In the manual about Draw I've read the *state oriented* approach were not reality here, you devs will rather prefer args instead (alike with FileOut the put32le() etc.).
I always have considered the states less cumbersome, and it results in a less number of args.
I will often call the paintLine() a lot of times, but the lines are always blue and have 4 pixels, then I can surround a rect with the same one.
Setting a var of my class I have always a "current state", hardly to avoid.
At the Apple you set a pen you can use subsequent, until you set a new one again. The "graphics context", as they call it, is treatened similar. Thats basically like at WIN-GDI (though these two systems have obvious differences for devs).
At the Apple they are also not starters there, so it seems a question of taste.
What is the advantage of using args instead?
OK, I'm spared of calling set-get-functions all the time, thats one thing after all, so the one call will do in some cases.
Martin
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Well, I guess there is no really strong argument for either side.
I guess it rather depends on what you want to do. For drawing widgets, context-less approach is better, as in fact only operations required are DrawText, DrawImage and DrawRect. Mostly for all of them, passing arguments is quite simple while maintaining the context logic is a bit more complicated.
Mirek
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