wpf - Dependency Property doesnt trigger -

-

i have problem dependency properties. have been searching quite while "how tos" nothing me far.

i need grid change background color when drag it. here code far:

vb

friend shared readonly isdragoverpropertykey dependencypropertykey = dependencyproperty.registerreadonly("isdragover", gettype(boolean), _                                                                                                       gettype(ucpagecontrol), _                                                                                                       new propertymetadata(false))   public shared readonly isdragoverproperty dependencyproperty = isdragoverpropertykey.dependencyproperty  private _isdragover boolean = true public property isdragover() boolean             return cbool(getvalue(isdragoverproperty))     end     set(byval value boolean)         setvalue(isdragoverproperty, value)     end set end property  private sub grid_dragenter(sender object, e windows.drageventargs)     isdragover = true end sub   private sub grid_dragleave(sender object, e windows.drageventargs)     isdragover = false end sub

xaml

 <grid margin="0,0,216,63" dragenter="grid_dragenter" dragleave="grid_dragleave" mouseenter="grid_mouseenter_1" mouseleave="grid_mouseleave_1" allowdrop="true" >     <grid.rowdefinitions>         <rowdefinition></rowdefinition>     </grid.rowdefinitions>     <grid.style>         <style targettype="grid">             <style.triggers>                 <trigger property="elements:ucpagecontrol.isdragover" value="false">                     <setter property="background" value="white"></setter>                 </trigger>                 <trigger property="elements:ucpagecontrol.isdragover" value="true">                     <setter property="background" value="black"></setter>                 </trigger>             </style.triggers>         </style>     </grid.style> </grid>

somehow grid doesnt realize when property changes. here help?

create new class inherites grid , contains dependancy property. , use in xaml.

<controls:mygrid margin="0,0,216,63" dragenter="grid_dragenter" dragleave="grid_dragleave" mouseenter="grid_mouseenter_1" mouseleave="grid_mouseleave_1" allowdrop="true" >     <controls:mygrid.rowdefinitions>         <rowdefinition></rowdefinition>     </controls:mygrid.rowdefinitions>     <controls:mygrid.style>         <style targettype="controls:mygrid">             <style.triggers>                 <trigger property="isdragover" value="false">                     <setter property="background" value="white"></setter>                 </trigger>                 <trigger property="isdragover" value="true">                     <setter property="background" value="black"></setter>                 </trigger>             </style.triggers>         </style>     </controls:mygrid.style>  </controls:mygrid>

Comments

Post a Comment

Popular posts from this blog

matlab - error with cyclic autocorrelation function -

-
Image
i'm trying code cyclic autocorrelation function in matlab follows: t=0:(n-1); t=t*te; i_alpha=0; tau=-n2*te:te:n2*te; alpha=-1/2:1/n:1/2; ryy_cl=zeros(length(alpha),length(tau)); alpha=alpha/te ind_tau=0; i_alpha=i_alpha+1; k=tau ind_tau=ind_tau+1; if k>0 % ryy_cl(i_alpha,ind_tau)=1/length(sig_bin_syl_mod(1:end- k))*sum((sig_bin_syl_mod(1:end-k)).*sig_bin_syl_mod(k+1:end)).*exp(1i*2*pi*alpha*t(1+k:length(sig_bin_syl_mod(1:end)))); ryy_cl(i_alpha,ind_tau)=(1/n)*sum((sig_bin_syl_mod(1:end-k)).*sig_bin_syl_mod(k+1:end)).*exp(-1i*2*pi*alpha*t(1:end-k)); else ryy_cl(i_alpha,ind_tau)=(1/n)*sum((sig_bin_syl_mod(1-k:end)).*sig_bin_syl_mod(1:end+k)).*exp(-1i*2*pi*alpha*t(1-k:end)); end end end i'm getting errors, , doesn't show expecting. according below formulae, how can fix it? the code provided incomplete, difficult confidently reproduce error. in particular, haven't de...
Read more

django - (fields.E300) Field defines a relation with model 'AbstractEmailUser' which is either not installed, or is abstract -

-
i trying create customuser django project email username , add radio button truck , company. in registration process email-id registered per truck or company. mentioned radio button 'tag' , add manytomany field tag in emailuser model. when makemigrations, raising error : (fields.e300) field defines relation model 'abstractemailuser' either not installed, or abstract. i quite new django , not sure whether have created correct code wants. please me solving this. here code, models.py: import django django.contrib.auth.models import ( abstractbaseuser, baseusermanager, permissionsmixin) django.core.mail import send_mail django.db import models django.utils import timezone django.utils.translation import ugettext_lazy _ class emailusermanager(baseusermanager): """custom manager emailuser.""" def _create_user(self, email, password, is_staff, is_superuser, **extra_fields): """create , save emailus...
Read more

c# - What is a good .Net RefEdit control to use with ExcelDna? -

-
i using exceldna , c# build suite of tools. part of forms i'd want user select cells/ranges workbook. i've got application.inputbox route working...but doesn't cool... i haven't read many things excel's refedit control, , see many have in past written workarounds, in (shudder) vba or vb.net. however, none of these seem recent... best approach/control refedit functionality on form run via exceldna (if applicable)? the refedit sample project of github explores different ways of dealing threading when showing form excel add-in, main issue making refedit control .net add-in. check page links various other implementations: https://github.com/excel-dna/exceldna/wiki/links-about-refedit
Read more