NSView

Authors

Scott Christley( scottc@net-community.com )

Felipe A. Rodriguez( far@ix.netcom.com )

Ovidiu Predescu( ovidiu@net-community.com )

Richard Frith-Macdonald( richard@brainstorm.co.uk )

The view class which encapsulates all drawing functionality

Copyright: (C) (C) 1996 Free Software Foundation, Inc.

NSView

NSView is an abstract class which provides facilities for drawing in a window and receiving events. It is the superclass of many of the visual elements of the GUI.

In order to display itself, a view must be placed in a window (represented by an NSWindow object). Within the window is a hierarchy of NSViews, headed by the window's content view. Every other view in a window is a descendant of this view.

Subclasses can override drawRect: in order to implement their appearance. Other methods of NSView and NSResponder can also be overridden to handle user generated events.

NSView : NSResponder

defaultMenu

focusView

Return the view at the top of graphics contexts stack or nil if none is focused.

acceptsFirstMouse:

Returns YES if the view object will accept the first click received when in an inactive window, and NO otherwise.

addCursorRect:cursor:

addSubview:

Adds aView as a subview of the receiver.

addSubview:positioned:relativeTo:

addToPageSetup

addToolTipRect:owner:userData:

addTrackingRect:owner:userData:assumeInside:

adjustPageHeightNew:top:bottom:limit:

adjustPageWidthNew:left:right:limit:

adjustScroll:

allocateGState

ancestorSharedWithView:

Returns self if aView is the receiver or aView is a subview of the receiver, the ancestor view shared by aView and the receiver, if any, aView if it is an ancestor of the receiver, otherwise returns nil.

autoresizesSubviews

autoresizingMask

autoscroll:

beginDocument

Writes header and job information for the PostScript document. This includes at a minimum, PostScript header information. It may also include job setup information if the output is intended for a printer (i.e. not an EPS file). Most of the information for writing the header comes from the NSPrintOperation and NSPrintInfo objects associated with the current print operation. There isn't normally anything that the program needs to override at the beginning of a document, although if there is additional setup that needs to be done, you can override the NSView's methods endHeaderComments, endPrologue, beginSetup, and/or endSetup. This method calls the above methods in the listed order before or after writing the required information. For an EPS operation, the beginSetup and endSetup methods aren't used.

beginPage:label:bBox:fonts:

beginPageInRect:atPlacement:

beginPageSetupRect:placement:

beginPrologueBBox:creationDate:createdBy:fonts:forWhom:pages:title:

beginSetup

beginTrailer

bounds

boundsRotation

canDraw

centerScanRect:

convertPoint:fromView:

convertPoint:toView:

convertRect:fromView:

convertRect:toView:

convertSize:fromView:

convertSize:toView:

dataWithEPSInsideRect:

dataWithPDFInsideRect:

didAddSubview:

discardCursorRects

display

displayIfNeeded

displayIfNeededIgnoringOpacity

displayIfNeededInRect:

displayIfNeededInRectIgnoringOpacity:

displayRect:

displayRectIgnoringOpacity:

dragFile:fromRect:slideBack:event:

dragImage:at:offset:event:pasteboard:source:slideBack:

drawPageBorderWithSize:

drawRect:

This method is invoked to handle drawing inside the view. The default NSView's implementation does nothing; subclasses might override it to draw something inside the view. Since NSView's implementation is guaranteed to be empty, you should not call super's implementation when you override it in subclasses. drawRect: is invoked when the focus has already been locked on the view; you can use arbitrary postscript functions in drawRect: to draw inside your view; the coordinate system in which you draw is the view's own coordinate system (this means for example that you should refer to the rectangle covered by the view using its bounds, and not its frame). The argument of drawRect: is the rectangle which needs to be redrawn. In a lossy implementation, you can ignore the argument and redraw the whole view; if you are aiming at performance, you may want to redraw only what is inside the rectangle which needs to be redrawn; this usually improves drawing performance considerably.

drawSheetBorderWithSize:

enclosingScrollView

endDocument

endHeaderComments

endPage

endPageSetup

endPrologue

endSetup

endTrailer

fax:

frame

frameRotation

gState

Returns an identifier that represents the view's gstate object, which is used to encapsulate drawing information about the view. Most of the time a gstate object is created from scratch when the view is focused, so if the view is not currently focused or allocateGState has not been called, then this method will

heightAdjustLimit

hitTest:

Returns the subview, lowest in the receiver's hierarchy, which contains aPoint

initWithFrame:

isDescendantOf:

Returns YES if aView is an ancestor of the receiver.

isFlipped

isOpaque

isRotatedFromBase

isRotatedOrScaledFromBase

knowsPageRange:

knowsPagesFirst:last:

locationOfPrintRect:

lockFocus

lockFocusIfCanDraw

menuForEvent:

mouse:inRect:

Returns whether or not aPoint lies within aRect

needsDisplay

nextKeyView

nextValidKeyView

opaqueAncestor

performKeyEquivalent:

performMnemonic:

postsBoundsChangedNotifications

postsFrameChangedNotifications

previousKeyView

previousValidKeyView

print:

printJobTitle

rectForPage:

reflectScrolledClipView:

registerForDraggedTypes:

releaseGState

Frees the gstate object, if there is one. Note that the next time the view is lockFocused, the gstate will be allocated again.

removeAllToolTips

removeCursorRect:cursor:

removeFromSuperview

removeFromSuperviewWithoutNeedingDisplay

Removes the receiver from its superviews list of subviews, by invoking the superviews [ -removeSubview: ] method.

removeSubview:

removeToolTip:

removeTrackingRect:

renewGState

Invalidates the view's gstate object so it will be set up again using setUpGState the next time the view is focused.

replaceSubview:with:

Removes oldView from the receiver and places newView in its place.

resetCursorRects

resizeSubviewsWithOldSize:

resizeWithOldSuperviewSize:

rotateByAngle:

scaleUnitSquareToSize:

scrollClipView:toPoint:

scrollPoint:

scrollRect:by:

scrollRectToVisible:

setAutoresizesSubviews:

setAutoresizingMask:

setBounds:

setBoundsOrigin:

setBoundsRotation:

setBoundsSize:

setFrame:

setFrameOrigin:

setFrameRotation:

setFrameSize:

setNeedsDisplay:

setNeedsDisplayInRect:

setNextKeyView:

setPostsBoundsChangedNotifications:

setPostsFrameChangedNotifications:

setPreviousKeyView:

setToolTip:

setUpGState

shouldDelayWindowOrderingForEvent:

shouldDrawColor

sortSubviewsUsingFunction:context:

subviews

superview

tag

toolTip

translateOriginToPoint:

unlockFocus

unregisterDraggedTypes

viewDidMoveToSuperview

viewDidMoveToWindow

viewWillMoveToSuperview:

Notifies the receiver that its superview is being changed to newSuperview.

viewWillMoveToWindow:

Notifies the receiver that it will now be a view of newWindow. Note, this method is also used when removing a view from a window (in which case, newWindow is nil) to let all the subviews know that they have also been removed from the window.

viewWithTag:

visibleRect

widthAdjustLimit

willRemoveSubview:

window

Returns the window in which the receiver resides.

writeEPSInsideRect:toPasteboard:

writePDFInsideRect:toPasteboard:

Software documentation for the NSView(PrivateMethods) category

NSView(PrivateMethods)

_invalidateCoordinates

_matrixFromWindow

_matrixToWindow

_rebuildCoordinates