xaml - Custom WPF ComboBox doesn't show grouping -


i have created custom combobox in wpf

<!-- combobox template -->     <controltemplate x:key="customcomboboxtogglebutton" targettype="togglebutton">         <grid>             <grid.columndefinitions>                 <columndefinition/>                 <columndefinition width="20"/>             </grid.columndefinitions>             <border x:name="border" grid.columnspan="2" cornerradius="3" background="{staticresource customdarkblue}" borderbrush="{staticresource customwhite}" borderthickness="2"/>             <border x:name="border2" grid.column="0" cornerradius="3,0,0,3" margin="1" background="{staticresource custombackground}" borderbrush="{staticresource customwhite}" borderthickness="1,1,2,1"/>             <path x:name="arrow" grid.column="1" fill="{staticresource customglyph}" horizontalalignment="center" verticalalignment="center" data="m 0 0 l 4 4 l 8 0 z"/>         </grid>         <controltemplate.triggers>             <trigger property="togglebutton.ismouseover" value="true">                 <setter targetname="border" property="background" value="{staticresource customdarkblue}"/>             </trigger>             <trigger property="togglebutton.ischecked" value="true">                 <setter targetname="border" property="background" value="{staticresource customdarkblue}"/>             </trigger>             <trigger property="isenabled" value="false">                                     <setter targetname="border" property="borderbrush" value="{staticresource customgray}"/>                 <setter targetname="border2" property="borderbrush" value="{staticresource customgray}"/>                 <setter property="foreground" value="{staticresource customgray}"/>                 <setter targetname="arrow" property="fill" value="{staticresource customgray}"/>             </trigger>         </controltemplate.triggers>     </controltemplate>      <!-- combobox -->     <style x:key="roundedcombobox" targettype="{x:type combobox}">         <setter property="snapstodevicepixels" value="true"/>         <setter property="overridesdefaultstyle" value="true"/>         <setter property="scrollviewer.horizontalscrollbarvisibility" value="auto"/>         <setter property="scrollviewer.verticalscrollbarvisibility" value="auto"/>         <setter property="scrollviewer.cancontentscroll" value="true"/>                     <setter property="foreground" value="{staticresource customwhite}"/>         <setter property="background" value="{staticresource custombackground}"/>         <setter property="height" value="21"/>         <setter property="fontsize" value="14"/>         <setter property="focusvisualstyle" value="{x:null}"/>         <setter property="template">             <setter.value>                 <controltemplate targettype="combobox">                     <grid>                         <togglebutton name="togglebutton" template="{staticresource customcomboboxtogglebutton}" grid.column="2" focusable="false" ischecked="{binding path=isdropdownopen,mode=twoway,relativesource={relativesource templatedparent}}" clickmode="press"/>                         <contentpresenter name="contentsite" ishittestvisible="false" content="{templatebinding selectionboxitem}" contenttemplate="{templatebinding selectionboxitemtemplate}" contenttemplateselector="{templatebinding itemtemplateselector}" contentstringformat="{templatebinding selectionboxitemstringformat}" margin="3,1,23,1" verticalalignment="center" horizontalalignment="left"/>                                                     <popup name="popup" placement="bottom" isopen="{templatebinding isdropdownopen}" allowstransparency="true" focusable="false" popupanimation="slide">                             <grid name="dropdown" snapstodevicepixels="true" minwidth="{templatebinding actualwidth}" maxheight="{templatebinding maxdropdownheight}">                                 <border x:name="dropdownborder" background="{staticresource custombackground}" borderthickness="2" borderbrush="{staticresource customwhite}"/>                                 <scrollviewer margin="4,6,4,6" snapstodevicepixels="true">                                     <stackpanel isitemshost="true" keyboardnavigation.directionalnavigation="contained"/>                                 </scrollviewer>                             </grid>                         </popup>                     </grid>                     <controltemplate.triggers>                         <trigger property="hasitems" value="false">                             <setter targetname="dropdownborder" property="minheight" value="95"/>                         </trigger>                         <trigger property="isenabled" value="false">                             <setter property="foreground" value="{staticresource customgray}"/>                                                         </trigger>                         <trigger property="isgrouping" value="true">                             <setter property="scrollviewer.cancontentscroll" value="false"/>                         </trigger>                         <trigger sourcename="popup" property="popup.allowstransparency" value="true">                             <setter targetname="dropdownborder" property="cornerradius" value="4"/>                             <setter targetname="dropdownborder" property="margin" value="0,2,0,0"/>                         </trigger>                                                 </controltemplate.triggers>                 </controltemplate>             </setter.value>         </setter>     </style>

this applied combobox

<combobox grid.column="0" x:name="cbochild" margin="140,65,0,0"  itemssource="{binding source={staticresource groupeddata}}" itemtemplate="{staticresource accounttemplate}" selectedvalue="{binding source={staticresource item}, path=child}" selectedvaluepath="id" width="150" style="{staticresource roundedcombobox}" horizontalalignment="left" verticalalignment="top">                                                 <combobox.groupstyle>                             <groupstyle headertemplate="{staticresource groupheader}"/>                                                         </combobox.groupstyle>                     </combobox>

the following found in window.resources

<window.resources>     <collectionviewsource source="{binding childaccounts}" x:key="groupeddata">         <collectionviewsource.groupdescriptions>             <propertygroupdescription propertyname="group"/>         </collectionviewsource.groupdescriptions>     </collectionviewsource>      <datatemplate x:key="groupheader">         <textblock text="{binding group}" margin="0" foreground="{staticresource customwhite}"/>     </datatemplate>     <datatemplate x:key="accounttemplate">         <textblock text="{binding comment}" margin="0" foreground="{staticresource customwhite}"/>     </datatemplate>         </window.resources>

basically grouping works should when roundedcombobox style not applied (ie. default combobox) whenever style applied drop-down popup empty

help!!

thanks andy

found answer..... use <itemspresenter ...> instead of <stackpanel ...>

thanks sa_ddam213 helpful advice above regarding binding.

andy


Comments

Post a Comment

Popular posts from this blog

Why does Ruby on Rails generate add a blank line to the end of a file? -

running rails generate controller foo home results in: class foocontroller < application controller def home end end (there's nothing on line in actual file, blank line) is there purpose blank line? it's common use newline indicate end of line, last line. many editors (like vi, use) add in newline silently. consensus text files (especially in unix world) should end in newline, , there have been problems historically if wasn't present. why should text files end newline? the tool used count lines in file "wc" counts newlines in file, without trailing newline show 3 instead of 4. it improves readability of templates used in generator. consider: https://github.com/rails/rails/blob/master/railties/lib/rails/generators/rails/controller/templates/controller.rb to remove trailing newline, template have last line of: end<% end -%> instead of: end <% end -%> that seems less readable me. the discussion below refers
Read more

keyboard - Smiles and long press feature in Android -

i've created android keyboard. how add features inserting smilies, , using long keypresses display symbols? to create long-press behavior allows select several options pop-up menu, follow guide (specifically pop-up menu section): http://developer.android.com/guide/topics/ui/menus.html smileys (also known emoticons) combination of keys, understood programs , parsed same way. have do, when clicks smiley face on keyboard, simulate pressing of key combination matching emoticon. example, when clicks smiley, should simulate key presses ':' , ')' :). here's list of emoticons: http://en.wikipedia.org/wiki/list_of_emoticons
Read more

node.js - Bad Request - node js ajax post -

i'm using express 3.0 , node v0.11.0. have button submits form , i'm using ajax post data json object node server. client code is: $('#contact').submit(function(e) { console.log('submit called'); var formdata = json.stringify($('form').serializeobject()); console.log(formdata); $.ajax({ url: "http://localhost:3000/savedata/", type: "post", datatype: 'json', data: {objectdata: formdata}, contenttype: "application/json", complete: function() { console.log('process complete'); }, success: function(data) { console.log('process sucess'); }, error: function() { console.log('process error'); }, }); return false; }); then on server: var express = require('express'); var app = express(); app.set('views', __dirname + '/views'); app.set('view engine', 'jade'); app.use(express.bodyparser());
Read more