c# - Why do my TextBoxes in different tabs of a TabControl lose their undo history? -

-

i have tabcontrol textbox controls in contenttemplate. when type text in 1 tab , switch tab, undo history in original tab gone when go back.

another problem comes text selected deselected , caret moves beginning of textbox.

if make window hardcoded tabitem controls, undo history preserved. issue has binding or templates.

here xaml main window

<window x:class="tabbedtextareatest.mainwindow"         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"         title="mainwindow" height="350" width="525">     <grid>         <grid.rowdefinitions>             <rowdefinition height="auto"/>             <rowdefinition/>         </grid.rowdefinitions>         <button command="{binding addnewtab}">add tab</button>         <tabcontrol itemssource="{binding tabs}" grid.row="1">             <tabcontrol.itemtemplate>                 <datatemplate>                     <textblock text="{binding header}"/>                 </datatemplate>             </tabcontrol.itemtemplate>             <tabcontrol.contenttemplate>                 <datatemplate>                     <textbox text="{binding content, mode=twoway, updatesourcetrigger=propertychanged}"/>                 </datatemplate>             </tabcontrol.contenttemplate>         </tabcontrol>     </grid> </window>

is there way preserve undo/redo history , selected text when switching tabs without manually catching commands?

when use tabcontrol gets tabs via databinding on itemssource, wpf doesn't keep visual tree each item around switch. thus, when switch tab 1 tab 2, tab 1, controls on tab 1 not same control instances saw on tab 1 first time.

there number of ways around deal - tabcontrols have explicit tabitem instances keep visual trees when switch tabs, easiest way wrap collection of tab items in makes tabitems them.

unfortunately right can't find link example of how this. there references articles elsewhere on so, seem point pages no longer exist, , don't have time dig deeper.


Comments

Post a Comment

Popular posts from this blog

django - How can I change user group without delete record -

-
on website user have 1 group. , user can change group. it's made user.groups.clear() and user.groups.add(new_group) but it's not efficient, because there 2 sql query: delete, insert. how can change group update query? user , group related each other using manytomanyfield . means intersection table exists relating both entities, , if don't specify model map (using through attribute) django creates 1 you. looking @ sources django.contrib.auth.models see that's case. fortunatly, can access intermediary model using through attribute of manager (in case, user.groups.through ). can use regular model. example: >>> alice = user.objects.create_user('alice', 'alice@example.com', 'alicepw') >>> employee = group.objects.create(name='employee') >>> manager = group.objects.create(name='manager') >>> alice.groups.add(employee) >>> alice.groups.all() [<group: employee...
Read more

java - Need to add SOAP security token -

-
i need set custom soap header attribute on jax-ws generated webservice client. case webservice calls must go through proxy server requiring specific token (recieved web request header) present in soap request header. e.g.: 1 carserviceservice service = null; 2 service = new carserviceservice(new url(url), new qname(qname); 3 carserviceendpoint port = service.getcarserviceport(); it seems in line 3 wsdl retrieved , call fails due missing security token. 1 point direction on how done? a detailed example has been mentioned here: creating , deploying jax-ws web service on tomcat 6 this article shows how create , use security token .
Read more

java - EclipseLink JPA Object is not a known entity type -

-
i have strange problem eclipselink , object want persist. have 1 object (keypointlistimpl) stores object keypointimpl in list. persisting keypointimpl objects works great if try persist keypointlistimpl object java.lang.illegalargumentexception says object keypointimpl isn't known entity type. here keypointimpl code: @entity @table(name="keypoints") public class keypointimpl implements keypoint { @id @generatedvalue(strategy = generationtype.identity) private int id; @enumerated(enumtype.string) private detectortype keypointtype; private float x; private float y; private float size; private float angle; private float response; private int octave; private int classid; ... } here keypointlistimpl code: @entity @table(name="keypointlists") public class keypointlistimpl implements keypointlist { @id @generatedvalue(strategy = generationtype.identity) private int id; @onetoone(cascade={ca...
Read more