What is the difference between creating an IPhone application using Interface Builder and without it?
Interface builder is simply an application that can help you place GUI elements and then associate IBOutlets and other in-code functions. you can go into Dashcode and actually read the code generated by Interface Builder but I think you will find that it is LONG and repetitive. Interface builder simply makes it easier to get the interface elements where and how you want them using a GUI. you don't NEED it but its sure useful.
you can create a full interface without an .xib or interfacebuilder you just have to write more code.
Related
I tried to create a properties view for a graph model in an Eclipse RCP Application. The graph elements are from a non-eclipse library and so don't implement IAdaptable or even IPropertySource.
The Tabbed Properties View, explained here:
http://www.eclipse.org/articles/Article-Tabbed-Properties/tabbed_properties_view.html
seems to be a simple possibility - but only for inputs that implement IAdaptable.
I've thought about implementing my own IPropertySheetPage but the only implementations I found are the built-in PropertySheetPage and TabbedPropertySheetPage which are very complex.
Is there another way to create a properties view for input elements that don't implement IAdaptable? Can I use Tabbed Properties View in a way I don't see yet? Are there any other less complex implementations of IPropertySheetPage, I can look at?
Thank you!
Kristina
Actually, you can write an IAdapterFactory for objects which don't implement IAdaptable and register it in plugin.xml or in your plugin activator. See http://www.eclipsezone.com/eclipse/forums/t61666.html.
Are there any other less complex implementations of IPropertySheetPage, I can look at?
Short answer: No.
But why don't you wrap the non-adaptable object into your own object that implements IAdaptable or IPropertySource or whatever, so that the property-page can work with your wrapper which holds the object you want to make editable through the property-page. And instead of providing this "library" object to global adapter-mechanism, create the wrapper, set the object and provide it to your global selection-service or whatever.
In my app, I made a subclass of UIView that I want to use in Interface Builder. Is there a way to make the instance variables settable via the "Attributes" section of IB?
Yes but not easily. In order for any custom controls to have Interface Builder support, you'll need to develop an IB plugin. I recommend going to the source for the nitty gritty. Take a look at the Interface Builder Plugin Programming Guide. Or, for a less overwhelming source, this blog.
I have a tricky question on interface. Please try to give me a solution for it.
Scenario:
I have written an interface with five methods. Also I have implemented more than 100 classes using this interface. Now, I need to add one more method to the interface. Consequently, I will need to define the same method in all classes. How can I avoid this???
Please reply...
Thanks,
Akif
Could you avoid adding a method to the interface by instead creating a new interface which inherits from that first interface and then only changing the classes you need that new method on? Hence, if foo didn't need the new method, leave it alone but if bar did, change it to the new interface.
Java 8 has default method which you could add to an interface
https://docs.oracle.com/javase/tutorial/java/IandI/defaultmethods.html
All the subclasses which do not override this method will resort to the default implementation in the interface
I know the thread on Interface Builder can't see classes in a static library
there add to InterfaceBuilder(IB) classes in static library, temporary.
The way is drag & drop the header files(.h).
It's working in one time booting the IB
I wanna permanently add to IB the classes.
How to do this?
In short, I'm not aware of any solution. Typically Read class Files... menu item in IB is sufficient to make IB aware of classes in static libraries.
I'm developing an application with Gtk and Glade. My impression is that it's common practice to create a subclass of GtkWindow for your main window, but I'm stuck on how I would construct my subclass from a GtkBuilder definition. Does anyone know how?
Subclassing GtkWindow is more common in GTK's various language bindings than it is in plain C. You didn't mention which language you were using.
That said, the way I subclass GtkWindow in C is to create the contents of the window in Glade, but not the window itself. In Glade 3 (IIRC) you can right-click on a widget in the palette and choose "Add widget as toplevel" to place a non-toplevel widget without a container.
Then write code for your subclass of GtkWindow, let's call it MyAppWindow. I won't go into that in this answer since there are plenty of examples in the GObject documentation. In the init function (my_app_window_init()) load the Glade file, use gtk_builder_get_object() to get a pointer to the outermost widget in the Glade file, and use gtk_container_add() to add it to the window you are constructing. Then use gtk_builder_connect_signals() as you normally would.
You have to set all the window's properties manually this way, since you can't do it in Glade, but other than that I've found it works quite well.
it is not common practice to subclass GtkWindow.
i don't think it is possible to subclass toplevel window created from gtkbuilder definition.
gtkbuilder needs to know about your subclassed widget before creation.
If you really want to create your own subclass of GtkWindow ptomato describes the basic steps well. It is also possible to create plugins for glade to make your custom widgets available. But this is not very easy, and most likely not what you want to do.
Most applications only use standard widgets without subclassing any of them. Then loading a glade file with gtkbuilder (or libglade) you don't need to have a special class for your GUI (like in some other RAD tools) instead you just get a set of objects. The API lets you look them up by name (and the window is basically just one of them). A common approach is to look up all widgets you are going to interact with and store them in global variables when the program starts up. Or if you need several instances of the window you can create a struct to store them in. Or you can simple lookup the widgets each time you need them. Note that the set of objects you get is completely dynamic. You can for example move the widgets between different windows just as if you created the GUI programmatically.