wpf - Best way to do a boolean-or-to-visibility -

-

i have control want visible if atleast 1 of series of properties return true. implement own booleanortovisibilitymulticonverter, feels there must better (and obvious) way this.

please enlighten me!

the mvvm way of doing return single boolean model contains logic works out whether control should visible or not.

normally if have kind of logic, it's because there's domain concept i'm trying express - instance:

  • it's in country
  • it's ready process
  • it still needs work
  • it complete outfit
  • all authors attributed

etc.

by keeping logic leads domain concept out of gui, make easier test , maintain. otherwise you'll end replicating same logic everywhere use domain concept, , it's not easy in xaml.


Comments

Post a Comment

Popular posts from this blog

c++ - Compiling static TagLib 1.6.3 libraries for Windows -

-
i having super hard time compiling , using taglib 1.6.3 in qt project. i've tried can think of. taglib claims supported through cmake i'm not having luck. furthermore, i'm confused kinds of files need qt libs! i've built *.a files, *.lib, , *.dll. understand far... believe since i'm working in windows *.lib want. no matter do, end "undefined references" taglib functions try use when try compile qt project. have tried mingw32, msys, visual studio 2008, , cross-compiling windows on linux. turning nothing. what makes less sense me if compile same taglib source qt on mac (g++ think?) works fine! somewhere in windows compilation procedures have going wrong. have been smacking face on desk 30 (on , off) hours trying figure out. since qt uses mingw must compile taglib same compiler? if compile *.lib's visual studio not compatible? are *.a libraries usable in windows? (assuming mingw) i'm still trying handle on c++ stuff, after reading coun...
Read more

PostgreSQL 9.x - pg_read_binary_file & inserting files into bytea -

-
i have been looking everywhere (google, stackoverflow, etc.) documentation on how use postgresql pg_read_binary_file() function. the meaningful thing can find this page in official documentation. every time try use function error. for example: select pg_read_binary_file('/some/path/and/file.gif'); error: absolute path not allowed or select pg_read_binary_file('file.gif'); error: not stat file "file.gif": no such file or directory do need have file in specific directory postgres have access it? if directory? if matters, reason looking @ function because trying insert file database without doing crazy things . as stated @a_horse_with_no_name , @guedes solution ensure file being uploaded on server in pgdata directory. the postgres documentation state file location requirement. additionally, made symlink directory pgdata directory not disturb of postgres data structure. seems working , don't have of above...
Read more

c++ - Update and multiple console windows -

-
i want write simple c++/c console app, show process 1% 2%. now, print line line like finished 1% finished 2% and etc how can update percentage x% without printing new line? also, want open 2 console windows 1 show messages 1 show process above. how open console window? on most-all terminals, can print ascii carriage return '\r' (value 13 decimal) return cursor left of current line, allowing overwrite previous value. or, can send backspaces ('\b', ascii 8) move single character left. neither automatically remove content displayed, can overwrite no longer want see spaces. alternatively, can use control codes supported particular console (e.g. vt100, vt220...), have more advanced features such "clear-to-end-of-line". many libraries available detect terminal type , use codes supports, or synthesize advanced operations many simpler ones necessary: on linux , unix, ncurses library choice. c++ has no concept of console windows. opening sec...
Read more