VB.NET - How to add borders on an MDI child borderless form? -

-

i using way below, add borders mdi child borderless forms...

private sub form_paint(sender object, e system.windows.forms.painteventargs) handles me.paint     if me.windowstate = formwindowstate.maximized         me.padding = new padding(0, 0, 0, 0)         me.backcolor = color.fromargb(76, 76, 76)     else         dim mf_rect new rectangle(5, 5, me.clientsize.width, me.clientsize.height)         dim mf_color = new solidbrush(color.fromargb(76, 76, 76))         e.graphics.fillrectangle(mf_color, mf_rect)         me.padding = new padding(5, 5, 5, 5)         me.backcolor = color.fromargb(64, 64, 64)     end if end sub

but, if mdi child form steps out of mdi parent's borders, half of it, , maximize , normalize again, borders gone!!! if slide in, see them again!!!

any idea why happening?

the dragging of form outside of mdi parent's borders not required reproduce behavior. need maximize , normalize form.

the problem form not being repainted after has been resized. default behavior, , makes degree of sense—the portion of client area visible has always been visible, , therefore still (presumably) painted correctly. optimization, then, no repaint performed.

but behavior doesn't work you, because painting logic tied current size of form. if form changes size, want repaint can calculate new painting dimensions.

you can hack forcing invalidation (and therefore repaint) of client area in response resize event. invalidate member function this.

but there better solution causes happen automatically. set form's resizeredraw property true. can either designer (in properties window) or in form class constructor. (note equivalent calling setstyle member function , specifying controlstyles.resizeredraw flag.)

an better approach separate painting of borders (which logically in non-client area) painting of contents of form (which logical client area). won't go how in answer, can find discussion , various tutorials elsewhere online. example, drawing custom borders in windows forms. article part of larger library implements effect you. not sure how/if library work mdi children. mdi effect has been deprecated many years…


Comments

Post a Comment

Popular posts from this blog

ios - RestKit 0.20 — CoreData: error: Failed to call designated initializer on NSManagedObject class (again) -

-
this error has shown on many times, seems. prominent answer issue seems restkit 0.20 — coredata: error: failed call designated initializer on nsmanagedobject class however, solution posted doesn't work me. let's start beginning: i want upload file server. want parse response make sure uploaded. if not, try again later. model has boolean variable called nsnumber *senttoserver purpose (in coredata, bool saved nsnumber ) . because don't know whether sending going successful, save entity coredata model first before sending via restkit. when post request successful, server returns json string this: {"id":14,"created":true} notice that, of course, id not set on coredata model yet, both id , created new informations model. here's model: @interface recording : nsmanagedobject @property (nonatomic, retain) nsstring * audiofilepath; @property (nonatomic, retain) nsdate * createdat; @property (nonatomic, retain) nsstring * deviceid; @
Read more

laravel - PDOException in Connector.php line 55: SQLSTATE[HY000] [1045] Access denied for user 'root'@'localhost' (using password: YES) -

-
my .env: app_env=local app_debug=true app_key=myappkey app_url=http://localhost db_connection=mysql db_host=localhost db_port=3306 db_database=gestiontaller db_username=root db_password='root' cache_driver=file session_driver=file queue_driver=sync redis_host=127.0.0.1 redis_password=null redis_port=6379 mail_driver=smtp mail_host=mailtrap.io mail_port=2525 mail_username=null mail_password=null mail_encryption=null i've tried password ", ' , without, restarting server every time. i've tried changing localhost 172.0.0.1. yes, password correct, running mysql -u root -p introducing password root in prompt can go mysql. users table: +------------------+-----------+ | user | host | +------------------+-----------+ | debian-sys-maint | localhost | | mysql.sys | localhost | | root | localhost | | root1 | localhost | +------------------+-----------+ i've added homestead.yaml this: database_port: 3306
Read more

java - Digest auth with Spring Security using javaconfig -

-
so i'm trying create digest authentication spring following documentation trying translate xml "requirements" in java requirements. let's have xml in docs: <bean id="digestfilter" class= "org.springframework.security.web.authentication.www.digestauthenticationfilter"> <property name="userdetailsservice" ref="jdbcdaoimpl"/> <property name="authenticationentrypoint" ref="digestentrypoint"/> <property name="usercache" ref="usercache"/> </bean> <bean id="digestentrypoint" class= "org.springframework.security.web.authentication.www.digestauthenticationentrypoint"> <property name="realmname" value="contacts realm via digest authentication"/> <property name="key" value="acegi"/> <property name="noncevalidityseconds" value="10"/> </b
Read more