xaml - WinRT - ImageButton for transparent PNGs -

-

i'm using xaml toolkit imagebutton control able create normal , pressed states button. code is:

<toolkit:imagebutton normalstateimagesource="ms-appx:///assets/1_off.png"                          pressedstateimagesource="ms-appx:///assets/1_on.png"                          width="500"                          height="200"> </toolkit:imagebutton>

issue i'm facing is, have shape isn't rectangle or square. example have pngs star , arrow object. there way set boundary corresponding shape? if not, please advice best approach handle such scenarios.

there 2 options tried

  1. when clicking using mouse or touch - you'd check last position of pointer before click , see if image in button has non-transparent pixel @ position.

    • pros:
      • it's simpler option 2.
      • you precise information
    • cons:
      • you can't tell if button got clicked mouse, touch, pen, keyboard or narrator using automation, end filtering out keyboard clicks because mouse cursor bit off. possibly use heuristics how long ago pointer move or pointer down event before click event, it's bit hacky , might unreliable.

  2. generate vector path image , put in button template path element fill="transparent", mark other non-transparent or hit testable template elements (buttons, borders background="transparent", etc.) ishittestvisible="false".

    • pros:
      • doesn't break input methods
      • can quite precise
      • for shapes circle - path.data quite simple or use ellipse element instead
    • cons:
      • you need generate path somehow
      • a complex path might adversely affect performance

a better solution overall in cases leave hit-testable area rectangular. reason - arbitrary shape finicky , unreliable hit test target makes clicking button more difficult. using default rectangular border or @ - ellipse shape lot simpler , more usable.


Comments

Post a Comment

Popular posts from this blog

html - Firefox flex bug applied to buttons? -

-
i'm trying apply flex button on firefox i'm having problem on chrome doesn't happens. this css: .button { display: inline-flex; align-items: center; } as can see in fiddle, "caret" word moved new line, happens if element <button> tag, <div> works expected. http://codepen.io/anon/pen/xblmgx is firefox bug or there css i'm missing? nevermind, looks "mr firefox" doesn't idea... <button> not implementable (by browsers) in pure css, bit of black box, perspective of css. means don't react in same way e.g. <div> would. this isn't specific flexbox -- e.g. don't render scrollbars if put "overflow:scroll" on button, , don't render table if put "display:table" on it. stepping further, isn't specific <button> . consider <fieldset> , <table> have special rendering behavior: data:text/html,<fieldset style="d...
Read more

html - Missing border-right in select on Firefox -

-
Image
when put select div width , padding-left, options have no border on right. more, happend if select have width 118px , parent have 15px of padding left! have idea, going on? my code: <!doctype html> <html> <head lang="en"> </head> <body> <div style="width: 1000px; padding-left: 15px;"> <select style="width: 118px;"> <option>a</option> <option>b</option> <option>c</option> </select> </div> </body> </html> and result: here plunker: click it happend on firefox on windows. tested on 40.0.2 version -webkit-box-sizing: border-box; -moz-box-sizing: border-box; -ms-box-sizing: border-box; box-sizing: border-box; source: https://stackoverflow.com/a/11390432/4431269 source of problem: https://bugzilla.mozilla.org/show_bug.cgi?id=924068 and use of google ! edit: (source of problem, explained) after rea...
Read more

python - build a suggestions list using fuzzywuzzy -

-
i building suggestion engine database. i'm using fuzzywuzzy module match user input string existing database shown below. if request.method == "get": display_dict = {} user_input = request.get["user_input"] # user input match_dict = {} food_items_obj = food_items.objects.all() # fetch objects table items in food_items_obj : match = fuzz.ratio(user_input.lower(),items.name.lower()) # try match user input existing names match_dict[match] = items.name # put 1 dictionary matched_dict = ordereddict(sorted(match_dict.items(),reverse = true)) # sort dictionary if max(matched_dict.keys()) == 100: # if exact match put in dict , return display_dict[100] = matched_dict[100] else : # if not found try best matching words.. ###########this part need help! ############# k,v in matched_dict.items(): if user_input in v : display_dict[k]...
Read more