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Saturday, 6 August 2011

Silverlight - Diferente intre MAC OS si Windows OS.

Posted on 03:33 by Unknown
Am fost întrebat zilele astea de doua persoane de limitările pe care le are Silverlight pe MAC OS. O sa încerc sa enumăr cîteva din aceste limitări mai jos.
1. Din cauza ca pe MAC unele tipuri de data nu exista sau sunt reprezentate diferit, este posibil ca metoda ToString() sa returneze valori diferite pe cele doua sisteme. Mai interesant este cand apelam ToString() pentru
Single.PositiveInfinity.ToString()
In cazul MAC-ului o sa obtinem "+oo", iar pe Windows o sa avem "Infinity".
2. Cand lucram cu informatii despre cultura (CultureInfo) rezultatele o sa difere intre cele doua sisteme chiar daca avem aceiasi cultura setata. Totodata TextInfo.ListSeparator pe MAC OS va returna mereu caracterul ',' indiferent de cultura pe care o avem setata.
3. Daca folosim metoda SaveFileDialog, aceasta nu o sa afiseze la user nici o eroare cand userul foloseste caractere invalide, dar in schimb se va arunca exceptia System.ArgumentException pe care noi trebuie sa facem cache.
4. Parsarea de URL-uri difera pe MAC, din aceasta cauza putem sa ne trezim cu '\' in loc de '/'.
5. Evenimentele de click pe butonul stang sau drept al mouse-ului (MouseRightButtonDown, MouseLeftButtonDown, ...) nu sunt suportate in totalitate pe MAC OS, deoarece nu avem 2 butoane pe mouse la toate device-urile. Din aceasta cauza aceste evenimente pot sa fie aruncate fara sa le putem controla de diferite device-uri pe care userul le are instalate.
6. Evenimentele de MouseWheel nu sunt suportate deloc pe MAC OS daca aplicatia nu ruleaza out of the brower. Daca ruleaza in brower e nevoie sa facem handle la ele prin intermediul DOM-ului HTML.
7. In cazul in care folositi evenimente de KeyPress, este bine de stiut ca exista PlatformKeyCode, care difera in functie de platforma.
8. Evenimentele de Drop nu sunt suportate pe MAC OS cand ruleaza in brower-ul Safari (dar exista un workaround pentru aceasta limitare.
9. Daca lucram cu socke-uri, modul in care sunt implementate difera usor, din aceasta cauza este bine sa verificam pe clasele pe care le folosim pentru socket-uri daca exista diferente pe cele doua platforme.
10. Resursele care sunt accesibile prin interop difera, din aceasta cauza trebuie sa verificam ce sistem de operare foloseste utilizatorul si sa apelam resursele corespunzatoare.
11. Implementarea la controler-ului WebBrower difera pentru cele doua sisteme, deoarece modul de randare este diferit.
12. Daca vrem sa facem debug, acesta poate sa fie facut doar prin Remote Debugging.
13. Pe MAC putem sa afisam o aplicatie Silverlight doar ca "windowed", pe cand pe Windows avem atat "windowed" cat si "windowless". Chiar daca avem o alta setare setata, pe MAC o sa fie folosita doar "windowed".
14. Exceptiile contine informatii diferite, iar unele pot sa fie eronate (linia si coloana unde a aparut exceptia).
15. Cand aplicatia ruleaza pe MAC OS in Safari, doua instante de HtmlPage.Window nu sunt egale.
16. MessageBox pe MAC OS o sa aibe mereu o icoana afisata, orice am face.
17. Zonele de access (cross-zone) difera pe MAC OS.

Daca ati mai gasit si alte diferente, va rog sa postati un comentariu.
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