c++ - Reposition graphics items on window resize -

-

ok, have randomly placed graphics items on graphics scene. open window , display these items. when resize window, want items stay same size reposition proportionally window size. how did subclassed graphics view , when there resize event, sent resize object graphicsscene object. able this:

double scalex = double(event->size().width())/double(event->oldsize().width()); double scaley = double(event->size().height())/double(event->oldsize().height());

then used these values this:

derivedpointitem->setpos( derivedpointitem->pos().x() * scalex,                           derivedpointitem->pos().y() * scaley );

this works ok, it's not quite right if resize window small or large. think problem graphicsscene rect , graphics view rect not same or something. furthermore, have background resizes window size:

void roiwindow::drawbackground( qpainter* painter, const qrectf& rect ) {     this->setscenerect(0,0,rect.width(),rect.height());     painter->save();     painter->drawimage(rect, *refimage);     painter->restore(); }

this need in program i'm writing. also, allows me see if resizing works. can set background polygon, place points on edges of polygon. when resize image large or small points no longer on vertices of polygon althought close. know better way or way fix it? thanks.

edit: here's project i'm working on:

dropbox.com/s/myxi8kvdl7x9ye2/ncorr.tar.gz

this method works (although i'm not sure if it's best method use...). anyway, ended being coding error due setpos() function. setpos() function in program worked specifying coordinates of top left corner of image rather center. ended causing errors.


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