I am trying to create an Eclipse plugin that contains a commonNavigator extension.
I can't figure out how to override the default alphabetical sorting. I want element type A to be before all the elements of type B. When I return the children of an element, I return them in the order that I want them, but they are displayed sorted.
I've seen a few really old tutorials that talk about a customSorter, but I am having trouble implementing it. This tutorial says to create it through plugin.xml, but when I try, I can only create a generic element, not a customSorter. I think it must be outdated because it didn't work even with the code that came with the tutorial.
Any tips?
Related
We are working on a React application (using Create React App without ejecting it) and we decided to use Ant as our base component library.
Now that we are near the end of the project, we discover that the application will be integrated into a corporate portal (WebSphere) as a "portlet", so we inherit all the CSS files from the main page.
Both frameworks seem to have their own reset styles, but they use different values.
So far, I have not been able to find a LESS variable in Ant that can be used for prefix all Ant's CSS rules.
Has anyone ever tried to make them live together?
We don't own the parent development, we can only make change on the React part, so only things related to Ant.
We finally go with a specific CSS patch file, and we add rules when needed.
Not really perfect, but none of the suggested path did the job we expected.
Here you can see some of the default antd variables.
One of them is #ant-prefix: ant;. I think you can change it and apply different styles.
That is a tough one, and at the end of development no less!
As #froston mentions, and which you seem to have tried the #ant-prefix: ant; in addition to this you will need to se prefixCls as a prop on every component instance you create, which will definitely be an exercise in self-flagellation.
Even if you set a global CONSTANT and import and use this with your components, you still have to thread it through to all the places, and will need to be appended with the component name.
By way of example, the defaultProps for an anchor is prefixCls: 'ant-anchor'.
Hope this helps and good luck!
I would like to know what the "proper" way to create new PsiElement instances and add them to the Psi tree is.
I looked at the tutorial provided by JetBrains (http://www.jetbrains.org/intellij/sdk/docs/tutorials/custom_language_support/quick_fix.html). The method they use there seems suitable for the simple properties language they introduce but I don't think it's the way to go with a more complicated syntax, where I want to add a child PsiElement that cannot appear at the root level of a PsiFile.
What would be best for me is to be able to parse a text snippet as an element and have it added to the tree. I tried to do something like this:
myLangTopElement.getNode().addLeaf(MyLangTypes.CHILD_EXPRESSION, "fish = '42'", null);
It actually seems to work - the text is added to the document and a node is created but when I edit the text inside the quotes in the editor - some exceptions are thrown...
What am I doing wrong? What is the correct way to add new elements?
PSI is complicated :(. A usual way is to create a whole file from a carefully prepared text (PsiFileFactory#createFileFromText), extract from it the PSI element you need to add into the tree, and then call PsiElement#add/addBefore/addAfter passing the extracted element as an argument. If your PSI element is a wrapper over AST (i.e. AstDelegatePsiElement), its add* methods already do the magic necessary for the exceptions not to be thrown.
You can study GrCreateSubclassAction#startTemplate from the IDEA CE source for an example, and the implementation of createCodeReferenceElementFromText that it calls.
I am learning Objective-C Cocoa programming for OS X, and object-based programming in general, so I am a big novice here, so my question is a bit general and my guess is the answer to this is simply "experience"; however, I am curious if there is some route of knowledge to understanding what methods in various classes are best or perhaps required for getting tasks done.
For example, in a programming guide I am instructed to create a document-based program, and the document class contains an array to store data, with the following method bound to a button to create a new entry in the array:
- (IBAction)insertItem:(id)sender {
if (!theItems) {
theItems = [NSMutableArray array];
}
[theItems addObject:#"Double-click to edit."];
[theTableView reloadData];
[self updateChangeCount:NSChangeDone];
}
The array is "theItems" and its data is being presented in a TableView object. I understand that the steps here add a new string to the array and then refresh the table to display it, followed by setting the document to be set to an unsaved state.
What I am not getting is how one would know these specific steps and methods are required. Intuitively it seems one would just add items to the array, and that would be all that's required to have the new values simply show up in the table view for which the array is the data source, so how would one know that the tableView would need to be refreshed with the "reloadData" call? I can see someone (myself) figuring it out by trial and error, but is there some quick resource or guide (ie, some quick flow-chart) either in XCode or elsewhere that indicates for a table view that this would have to be a required action to display the new entry?
If I look at Apple's NSTableView class reference, it claims in the overview that you "modify the values in the data source and allow the changes to be reflected in the table view" which suggest the view is updated automatically, so the requirement to call "reloadData" on the view seems a little obscure.
Look for the guides. In the online class reference for NSTableView, there's a section at the top called "Companion Guides". For NSTableView, it lists the Table View Programming Guide for Mac. (In the prerelease 10.10 docs, the guides are listed under Related Documentation in the left-hand sidebar.)
I could have sworn this same information was available in Xcode's Documentation window, albeit somewhat hidden behind a "More related items" pseudo-link, but when I check right now there's no link to the guide anywhere in the NSTableView class reference. Which is a terrible oversight.
You can also browse or search the Guides section of the developer library.
Familiarity, studying the documentation and possibly reading some good books is the answer. For example, in the docs you quoted (emphasis mine)
you should modify the values in the data source and allow the changes to be reflected in the table view
You should do both these things. If you want it to happen "automatically", look into bindings, which uses several other Cocoa features you won't understand at this point either to do the table data source stuff for you. I'd recommend understanding what is happening manually before handing over control to bindings, so you have some chance of understanding when things go wrong.
As well as looking at the table view documentation, you also need to study the cell, delegate and datasource references. All of those objects work together to give you the functioning table view.
I'm developing plugin for IDEA. It need to select public abstract methods with no parameters, and allow user to choose subset of them. I found MemberChooser dialog, but cannot see similar thing for methods.
So if I have List<PsiMethod> how to show dialog for choosing subset of them?
You can use MemberChooser.selectElements with your list.
That is, if you create a PsiMethodMember from each PsiMethod.
How I can create a code in XCode 4.2.1 what will create NSTableView and add just couple of items to it?
All what I wanted to do is:
1) Window where is NSTableView
2) I have an array of strings in NSArray which I like to show in that NSTableView
3) All of this should be done in code. So I don't want to learn how to add this action happen when you press button (I know already how to do actions when user click buttons etc), I just want that application launch -> draws the table where is those items from my array. That's it, nothing more.
And yeah I have understood that I do not add items to NSTableView directly. That is not the point in this question. I just mean that I want to show couple of items in that table but I have no and kind of clue WHERE I should add my data from my array.
I have tried to google for example pages for hours (just too many and have not find help) but I will always be stucked in the part when
a) I must do something in the Interface Builder and the images of the interface builder are from version 2.x or 3.x and I have 4.2.1 and it is totally different (new to XCode...). Surely I have drawn my TableView element to UI but I mean delegations etc. Are those necessary at all? Can those be made from source code?
b) Code just does not work anymore because language (Cocoa or Objective-C, I don't know) has changed and I don't know how and what I have to do to make it work on newest version of XCode.
c) There is too much different ways told: "use binding", "you must create new class what is NSTableViewDataSource" etc. I have no any kind of clue what is preferred way, is another way optional or it is "you should use this because another is going deprecated soon" or something.
So please, can somebody give help in step-by-step what I exactly have to do? Should I create some bindings? If so, how and where? Do I have to create DataSource component myself? Are those ways valid any more? If I have to, how I can create it? Create a new class and implement it as a NSTableViewDataSource and then use it? Is that way valid any more and if it is, can sombody show code what is as simple as possible?
I have also checked Apple Documentation page many many times, checked those example codes but there is just too much totally unrelated stuff that I just don't understand at this point so they are totally useless (I mean, I don't know what is required for this task, what are not etc.
I would be very happy if somebody can help short tutorial step-by-step what to do. I mean "step-by-step" like:
1) Create new project
2) Draw NSTableView in project
3) Create new class with this name
4) Write this code: blah blah blah
5) Create another class with this name
6) Write this code
7) Run and see those items from array in NSTableView using (bindings/datasource/whatever is preferred).
Thanks :)
Your tableview needs a datasource. Your datasource is a custom class, it implements the "NSTableViewDataSource" protocol. This protocol contains a few methods that you can use to tell the tableview what data you got.
this includes the objectValue ( the value of the NSCell that is displaying your data on the specified row, and a method that returns the amount of rows the tableview has ( the amount of items in your array ).
Here a tutorial I found by googling:
CocoaDev.com NSTableView tutorial
You can also implement the NSTableViewDelegate protocol which allows some greater control. Like what rows you can select, or some extra configuring of a custom tableview cell.
I must say that back in the day when I started developing desktop applications ( only had experience with web technologies ) that this design pattern confused me as well. Hope you will get your mind round it soon.