render

问题 I would like to put a JButton inside a JComboBox. This button lets users browse for files. The file the user selects gets added to the JComboBox list. How do I do this? Do I use some kind of a Renderer? Thank you. EDIT: After reading more about ListCellRenderer I tried the following code: JComboBox comboBox = new JComboBox(new String[]{"", "Item1", "Item2"}); ComboBoxRenderer renderer = new ComboBoxRenderer(); comboBox.setRenderer(renderer); class ComboBoxRenderer implements ListCellRenderer

问题 I want a before filter like "must_have_permission_to_write" that when called if user hasn't permission to write renders a message saying "you can't do that!" and return. Problem is I'm getting "can only render or redirect once per action" of course... how can I stop the execution in the before filter? thanks 回答1: I think the easiest answer is add a redirect and return false to your must_have_permission_to_write method. def must_have_permission_to_write unless current_user.has_permission?

问题 I am just starting to use Services in Grails and I am having an issue when trying to render a page from inside a service, I have tried a few methods as shown below with no luck: Service Call 1: GroupCheckService.isEnabled(userObjects.group.notenabled) Service Attempt 1: import grails.gsp.PageRenderer class GroupCheckService { PageRenderer groovyPgeRenderer static transactional = false def isEnabled(boolean notenabled) { if(notenabled == true){ groovyPgeRenderer.render(view: '/locked') }else{

问题 I have a custom view that I am trying to display, however I am seeing a bunch of jitter on it. Everything scrolls slow and it isn't as responsive as it should be. I used traceview and saw that GLES20Canvas.nDrawDisplayList seems responsible for taking a lot of time to execute. Any help please? 回答1: GLES20Canvas.nDrawDisplayList is expected to have a large portion of the time if you are drawing a lot, especially very big views. If you are seeing this all over your traceview the answer is "DRAW

问题 Is it possible to draw shapes by using ShapeRenderer between SpriteBatch begin and end calls. I have tried but no result, only SpriteBatch textures are drawn, no shape is on the scene. Sample code is as followed below : shapeRenderer.begin(ShapeType.FilledCircle); shapeRenderer.setColor(0f, 1f, 0f, 1f); shapeRenderer.filledCircle( 100, 100, 100); shapeRenderer.end(); I have a orthographic camera created by these commands : camera = new OrthographicCamera(1, Gdx.graphics.getHeight() / Gdx

问题 I know this has been asked before, but none of the answers really helped me. So my problem is this: I have a bunch of .pov files named, XXXXX000001...., and I want to render them, but the queue thing inside of POV-Ray only lets you render 500 at a time. So, is there a way to render them all automatically? I know the answer is to write a script of some kind, but I don't know a lot about it so if you could give me a step by step instructions I would be grateful. 回答1: Create a POV-Ray .ini file

问题 I have managed to use suggested code in order to render HTML from a webpage and then parse, find and use the text as wanted. I'm using PyQt4. However, the webpage I am interested in is updated frequently and I want to rerender the page and check the updated HTML for new info. I thus have a loop in my pythonscript so that I sort of start all over again. However, this makes the program crash. I have searched the net and found out that this is to be expected, but I have not found any suggestion

问题 This question is to piggy back off of a previous one I asked yesterday, which deals with moving the create/edit feature of a model onto its index page. One last issue I am having is that I when I go to delete a model, I have some javascript that is supposed to run that reloads the list of models to reflect the change in the database. This js is being rendered as html. Here is the code that I think is relevant: in my controller: def destroy @post = Post.find(params[:id]) @post.destroy flash[

问题 After the RenderTargetBitmap is much too slow. I tried a different approach. Unfortunately my attempt was not successful. Hopefully some of you guys can figure out why this code is not working. var myPopup = new Popup(); var child = new Grid() { Background = new VisualBrush(myVisual)}; myPopup.StaysOpen = false; myPopup.Child = child; myPopup.IsOpen = false; myPopup.Opened += (sender, args) => { var source = ((HwndSource)PresentationSource.FromVisual(myPopup.Child)); var image = new Bitmap

问题 I am having to explicitly render :layout => 'application' in my controller actions in order to get my new rails 3 app to actually use the application.html.erb layout file. Any obvious things to look for that I am doing wrong? If I don't call the :layout option it just doesn't render the layout. I get a message like: Processing by FooController#index as HTML ...when I read the terminal window trace on WEBrick 回答1: I experienced the same problem with an app upgraded from Rails 2.3.8 to 3.0.3.