javascript - Can the opacity / translucence of an SVG group be adjusted together? -


i have svg "g" object has several components. i'd render whole thing partly transparent (e.g. alpha = 0.5) i'd to darker if possible. know individual fill colors can adjusted, how of them together, possibly in parameters "g" (grouping) structure.

changing opacity of <g> (either opacity="..." attribute, or opacity css rule) cause contents of group first composited , result lowered in opacity. note distinctly different lowering opacity on elements inside group (which can via css):

demo: http://jsfiddle.net/hzr7v/12/

enter image description here

uses svg:

<svg xmlns="http://www.w3.org/2000/svg" width="400" height="400">     <defs><filter id="darker">       <fecolormatrix type="matrix" values="        0.3  0   0   0   0         0  0.3  0   0   0         0   0  0.3  0   0         0   0   0  0.8  0"/>     </filter></defs>     <g id="g1" transform="translate(60,60)"> <!-- top left -->         <circle r="40" /><rect width="80" height="60" />     </g>     <g id="g2" transform="translate(220,60)"><!-- top right -->         <circle r="40" /><rect width="80" height="60" />     </g>     <g id="g3" transform="translate(60,200)"><!-- bottom left -->         <circle r="40" /><rect width="80" height="60" />     </g>     <g id="g4" transform="translate(220,200)"><!-- bottom right -->         <circle r="40" /><rect width="80" height="60" />     </g> </svg>

…with css:

circle { fill:red } rect { fill:blue }  #g2 * { opacity:0.5 }         /* change opacity of each shape    */ #g3   { opacity:0.5 }         /* change opacity of group     */ #g4   { filter:url(#darker) } /* darkens , drops opacity group */

note in particular difference in appearance circle , square overlap.

the fecolormatrix filter looks daunting. set rgb values each 30% of original rgb (i.e. darker), , alpha 80% of original alpha. change values see fit.

oh, , if want desaturate can throw filter (before or after darken step):

<fecolormatrix type="saturate" values="0.5"/> <!-- values="0"  drop color, leaving grayscale --> <!-- values="1"  leave current saturation color     --> <!-- values="99" super-saturate colors              -->

Comments

Post a Comment

Popular posts from this blog

monitor web browser programmatically in Android? -

i've got tricky question here. need users make payment bank (namely barclaycard) in uk. so, have https url , add parameters (such amount pay, order reference, etc) url, start http connection intent.actionview, redirect user browser can enter credit card details on bank's webpage , make payment our account successfully. far ? the code use below (i changed values privacy reasons) problem is, need app when user has completed/failed/cancelled payment. barclaycardautomatically redirects particular url when payment has succeeded, 1 if failed. there no way of knowing when barclaycard payment has succeeded go android app somehow ? button cardbutton = (button) findviewbyid(r.id.card_button); cardbutton.setonclicklistener(new view.onclicklistener() { @override public void onclick(view arg0) { string prehashstring = new string(); string prohashstring = new string(); string shapassphrase = new string(); shapassphrase = "gsvth£h70zkh...
Read more

Shrink a YouTube video to responsive width -

i have youtube video embedded on our website , when shrink screen tablet or phone sizes stops shrinking @ around 560px in width. standard youtube videos or there can add code make go smaller? you can make youtube videos responsive css. wrap iframe in div class of "videowrapper" , apply following styles: .videowrapper { float: none; clear: both; width: 100%; position: relative; padding-bottom: 56.25%; padding-top: 25px; height: 0; } .videowrapper iframe { position: absolute; top: 0; left: 0; width: 100%; height: 100%; } the .videowrapper div should inside responsive element. padding on .videowrapper necessary keep video collapsing. may have tweak numbers depending upon layout.
Read more

wpf - PdfWriter.GetInstance throws System.NullReferenceException -

i'm trying create pdf document using itextsharp 5.3.4 using following document document = new document(); filestream stm = new filestream(filename, filemode.create); pdfwriter writer = pdfwriter.getinstance(document, stm); i'm getting system.nullreferenceexception following stack trace: system.nullreferenceexception occurred hresult=-2147467261 message=la référence d'objet n'est pas définie à une instance d'un objet. source=itextsharp stacktrace: à itextsharp.text.version.getinstance() innerexception: i've verified neither document nor stm null, , if select "continue" in vs12 document created - exception thrown. updated itextsharp 5.4.0 , it's still occurring. can't find information on anywhere - got ideas? make sure not catching exceptions. nullreferenceexception can 1 caught , handled inside itextsharp, don't care it. fact can continue supports theory. change following setting verify: debug -> exceptions ...
Read more