This is the README for PAScrollViewDeluxe.s.tar.gz [Download] [Browse] [Up]
PAScrollViewDeluxe By Jeff Martin (jmartin@next.com (415) 780-3833) Class Description This object is an enhanced subclass of ScrollView. It adds the following features: Support for a 'top view', a view at the top of the scroll view that scrolls horizontally with the document but remains static when the document is scrolled vertically. This is useful to add column headers, rulers, etc, to a document. The top view can be added from inside of IB by connecting the topView outlet. Support for a 'left view', a view to the left of the scroll view that scrolls vertically with the document, but remains static when the document is scrolled horizontally. This is useful for adding rulers, line numbers, etc, to a document. The left view can be added from inside of IB by connecting the leftView outlet. Automatic support for rulers. If a topView or leftView has not been set, a call to setShowTopView:YES, setShowLeftView:YES, showRulers: or toggleRulers: will instanciate a member of rulerClass (see setRulerClass:). Depending on which ruler is called, the scrollview will try to call setHorizontal or setVertical on the new rulerClass instance. The default class is Ruler (from Draw). A ruler that supports flipping and smooth zooming is forthcoming. Support for synchronizing other scroll views. Other ScrollViews can be made to scroll, size and zoom with respect to the docView by using the addSyncViews: methods. This is useful for ruler type views that need to exist outside of the scrollers. One synchronized view of each type can be added in IB by connecting a given ScrollView to the syncViews, horizSyncViews or vertSyncViews outlets. Be sure and connect to a ScrollView and not its content view (this can be tricky for ScrollViews without scrollers). Synchronized ScrollViews should not have scrollers of their own (but they can). Automatic support for page up/down & left/right buttons. Simply call the method setPageUpDownButtonsVisible:YES or setPageLeftRightButtonsVisible:YES and these are added automatically. They are removed temporarily if the scroller is too small(less than an inch), if there is nothing to be scrolled or if the scrolling area is less than 2 pages. Automatic support for zooming. Simply call the method setShowZoomButton:YES and a popup list containing zoom values will be added to the horizontal scroller. Zooming is implemented by calling zoomTo:(float)zoomX :(float)zoomY on the docView(and topView, leftView, syncViews, horizSyncViews and vertSyncViews). If the docView does not respond to this method or returns NO from this method, automatic zooming is performed by scaling the clipView by the zoom amount. The 'Set...' item in the zoom popup allows for arbitrary scaling. The 'Fit' menu item calculates the zoom value necessary to fit the docView entirely in the scrollview. The default zooming behavior tends to fail on documents that contain NXImages. Implement zoomTo:: in your custom view to explicitly scale NXImages (returning NO if you don't otherwise handle zoom). Support for adding arbitrary views to the vertical and horizontal scrollers. This is useful for adding little gadgets like a 'goto page' control inside of the horizontal scroller. The page up/down & left/right buttons as well as the zoom button use this facility. Page left/right is assumed to be the first in the horizScrollerViews list if it exists. The zoom button is next. Other views should be added at [horizScrollerViews count]. Page up/down is assumed to be first in the vertScrollerViews list. Scroller views are temporarily removed in reverse order if the scroller is not long enough to accommodate them. The PAScrollViewDeluxe palette allows you to create a PAScrollViewDeluxe by command clicking the 'Group in ScrollView' menu item. The code is a complete hack inside of the PAScrollViewDeluxeInspector code (at the bottom) and introduces a bug into IB that you can no longer drag the default TextObject/ScrollView in (it just disapears).
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.