1 / 6

DOOM Case Study: Wedgi

DOOM Case Study: Wedgi. Wedgi: Wordbench: Editing with a Graphical Interface see http://www.cs.duke.edu/~ola/courses/cps108/code/java/wedgi/ towards a source browser? (see sniff+ www.takefive.co.at )

olive
Download Presentation

DOOM Case Study: Wedgi

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. DOOM Case Study: Wedgi • Wedgi: Wordbench: Editing with a Graphical Interface • see http://www.cs.duke.edu/~ola/courses/cps108/code/java/wedgi/ • towards a source browser? (see sniff+ www.takefive.co.at) • Load files/URLs (other sources) into a framework that lets you edit the source, cut/copy/paste, etc. [what’s the etc.?] • how might the user interact with the program? • What are the requirements? What are the use-cases? • Use-case • textual, narrative description of the processes in a system • how the user interacts with the system (how components of the system interact with each other)

  2. Wedgi: DOOM stage 1 • Get a working prototype up and running • work on requirements/specifications, prioritize project components, develop use-cases • choose core classes and responsibilities/relationships • write core stubs/headers, both behavior and state • get prototype up and running • Load files/URLs (both initially?) navigate among sources • Readers for sources • CardLayout for navigation • Mediator, GUI, WedgiText, other classes? • How does cut/copy/paste work?

  3. Multiple WedgiText objects • How can we cycle between several documents loaded into Wedgi? • What operations might we perform on a document? • How are documents tracked internally? • CardLayout • in theory facilitates “tabbed” layout, select among several displays • not all are actually shown (as should be in tabbed layout), in JDK 1.2 there is a tabbed layout • Objects added to container with CardLayout must be associated with a name • next, previous, first, last, and named object • What is name of first? What is name of next? Who tracks the names?

  4. Alternatives to CardLayout for Wedgi • Keep a vector/hashtable of WedgiTexts associated with a name • how is view changed when user selects another WedgiText • why doesn’t this work? myWedge = selectedWedgi; validate(); • What can we do instead to get at the idea of swapping the displayed view for another? What are the issues? • What’s the state and who’s the parent • How will save work, what about remove (for WedgiTexts) • alternatives to maps of name -> WedgiText? • What is a WedgiText? Compared to what?

  5. DataTransfer • Transferring objects and stuff between widgets in an application, between Java applications, between Java and other applications • application-specific clipboard, System clipboard • package objects and stuff up in some way that facilitates transfer • transfer in what format, out in another, e.g., HTML text • Cut and Paste • put/get a Transferable (interface) to/from clipboard setContents(Transferable,Owner), getContents(Owner) • Transferable supports at least one DataFlavor • DataFlavors are built on MIME types

  6. DataTransfer and DataFlavors For more information see Core Java Vol. II and online AWT supplemental info • MIME: Multipurpose Internet Mail Extensions • facilitate reading/writing attachments • can be used to facilitate MIME-aware Java app transfers • DataFlavors • Java and other non-Java program: transfer text • Same java program: any object • MIME-aware inter-java transfer: text-encoded/MIME data • Tranferable: returns string, stream or other source Cut and Paste DataFlavors[] flavors = trans.getTransferDataFlavors(); DataFlavor gifF = new DataFlavor(“image/gif”, “GIF bitmap”); if (trans.isDataFlavorSupported(gifF))… Object o = trans.getTransferData(someFlavorObject);

More Related