c# - Binding Opacity values to a static property; -


i trying make desktop overlaying application (think rainmeter) , because backgrounds can change, want able change general colors , alpha values text in application.

so in settings menu want slider onvaluechanged sets property in static class , lots , lots of controls have opacity bound property. make complicated (maybe?) application has multiple windows open simultaneously. have little experience binding , can't work.

my code far:

visualsettings.cs

namespace projectsidebar {     public  class visualsettings     {         public static double opacity { get; set; }     } }

mainwindow.xaml

<window x:class="projectsidebar.mainwindow"         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"         xmlns:psb="clr-namespace:projectsidebar"         title="mainwindow"  height="1080" width="300" resizemode="noresize" showintaskbar="false" windowstyle="none" closing="window_closing_1" loaded="window_loaded" background="transparent"  >     <window.resources>         <psb:visualsettings x:key="visualsettings"/>     </window.resources>      <grid>         <textblock x:name="clocktb" horizontalalignment="left" textwrapping="wrap" text="22:22:22" verticalalignment="top" height="84" width="300" cursor="none" foreground="white" fontsize="48" fontfamily="batmanforeveralternate" textalignment="center" opacity="{binding source={staticresource visualsettings} , path=opacity}" margin="0,22,0,0" rendertransformorigin="0.5,0.5">             <textblock.rendertransform>                 <transformgroup>                     <scaletransform scaley="1.5"/>                     <skewtransform/>                     <rotatetransform/>                     <translatetransform/>                 </transformgroup>             </textblock.rendertransform>         </textblock>           <slider x:name="testslider" horizontalalignment="left" margin="10,1052,0,0" verticalalignment="top" rendertransformorigin="0.5,0.611" width="172" foreground="#ff122268" valuechanged="testslider_valuechanged" largechange="0.1" smallchange="0.01" maximum="1" value="0.65"/>     </grid> </window>

mainwindow.xaml.cs

private void testslider_valuechanged(object sender, routedpropertychangedeventargs<double> e) {     visualsettings.opacity = testslider.value;  }

can me out?

kind regards, roxas

you can bind static properties using x:static issue x:static don't support property changed mechanism i.e. if static property changes, won't updated on ui.

however, wpf 4.5 have support using event staticpropertychanged. need make sure whenever static property changes raise event ui gets updated.

also syntax binding static properties bit different in case:

"{binding path=(local:visualsettings.opacity), mode=twoway}"

sample can found here.


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