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NSScroller

Authors

Ovidiu Predescu (ovidiu@net-community.com)
Felipe A. Rodriguez (far@ix.netcom.com)
Richard Frith-Macdonald (richard@brainstorm.co.uk)

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

Software documentation for the NSScroller class

NSScroller : NSControl

Declared in:
AppKit/NSScroller.h
Conforms to:
NSCoding
Availability: OpenStep

TODO Description


Instance Variables

Method summary

scrollerWidth 

+ (CGFloat) scrollerWidth;
Availability: OpenStep

Returns the NSScroller's width. By default 18.

Subclasses can override this to provide different scrollbar width. But you may need to also override -drawParts .


scrollerWidthForControlSize: 

+ (CGFloat) scrollerWidthForControlSize: (NSControlSize)controlSize;
Availability: MacOS-X 10.0.0

Description forthcoming.

arrowsPosition 

- (NSScrollArrowPosition) arrowsPosition;
Availability: OpenStep

Returns the position of the NSScroller's arrows used for scrolling By default the arrow position is set to NSScrollerArrowsMinEnd if the scrolletr is a horizontal scroller and NSScrollerArrowsMaxEnd if the scroller is a vertical scroller. See NSScrollArrowPosition for more informations.

See Also: -arrowsPosition


checkSpaceForParts 

- (void) checkSpaceForParts;
Availability: OpenStep

Description forthcoming.

controlSize 

- (NSControlSize) controlSize;
Availability: MacOS-X 10.0.0

Description forthcoming.

controlTint 

- (NSControlTint) controlTint;
Availability: MacOS-X 10.0.0

Description forthcoming.

drawArrow: highlight: 

- (void) drawArrow: (NSScrollerArrow)whichButton highlight: (BOOL)flag;
Availability: OpenStep

(Un)Highlight the button specified by whichButton. whichButton should be NSScrollerDecrementArrow or NSScrollerIncrementArrow

See Also: [NSCell -setHighlighted:] [NSCell -drawWithFrame:inView:]


drawKnob 

- (void) drawKnob;
Availability: OpenStep

Draws the knob


drawKnobSlot 

- (void) drawKnobSlot;
Availability: OpenStep

Description forthcoming.

drawKnobSlotInRect: highlight: 

- (void) drawKnobSlotInRect: (NSRect)slotRect highlight: (BOOL)flag;
Availability: Not in OpenStep/MacOS-X

Description forthcoming.

drawParts 

- (void) drawParts;
Availability: OpenStep

Cache images for scroll arrows and knob. If you override +scrollerWidth you may need to override this as well (to provide images for the new width). However, if you do so, you must currently also override -drawArrow:highlight: and -drawKnob: .

highlight: 

- (void) highlight: (BOOL)flag;
Availability: OpenStep

Highlights the button whose under the mouse. Does nothing if the mouse is not under a button

See Also: -drawArrow:highlight:


hitPart 

- (NSScrollerPart) hitPart;
Availability: OpenStep

Returns the part of the NSScroller that have been hit (mouse down) See NSScrollerPart for more information

See Also: -highlight: [NSResponder -mouseDown:]


knobProportion 

- (CGFloat) knobProportion;
Availability: OpenStep

Returns a float value (between 0.0 and 1.0) indicating the ratio between the NSScroller length and the knob length


rectForPart: 

- (NSRect) rectForPart: (NSScrollerPart)partCode;
Availability: OpenStep

Description forthcoming.

setArrowsPosition: 

- (void) setArrowsPosition: (NSScrollArrowPosition)where;
Availability: OpenStep

Sets the position of the NSScroller arrows used for scrolling to where and marks self for display. By default the arrow position is set to NSScrollerArrowsMinEnd if the scroller is a horizontal scroller and NSScrollerArrowsMaxEnd if the scroller is a vertical scroller. See NSScrollArrowPosition for more informations.

See Also: -arrowsPosition


setControlSize: 

- (void) setControlSize: (NSControlSize)controlSize;
Availability: MacOS-X 10.0.0

Description forthcoming.

setControlTint: 

- (void) setControlTint: (NSControlTint)controlTint;
Availability: MacOS-X 10.0.0

Description forthcoming.

setFloatValue: knobProportion: 

- (void) setFloatValue: (float)aFloat knobProportion: (CGFloat)ratio;
Availability: MacOS-X 10.0.0

Description forthcoming.

setKnobProportion: 

- (void) setKnobProportion: (CGFloat)proportion;
Availability: Not in OpenStep/MacOS-X

Description forthcoming.

testPart: 

- (NSScrollerPart) testPart: (NSPoint)thePoint;
Availability: OpenStep

Returns the NSScroller's part under the point thePoint. See NSScrollerPart for more informations


trackKnob: 

- (void) trackKnob: (NSEvent*)theEvent;
Availability: OpenStep

Description forthcoming.

trackScrollButtons: 

- (void) trackScrollButtons: (NSEvent*)theEvent;
Availability: OpenStep

Description forthcoming.

usableParts 

- (NSUsableScrollerParts) usableParts;
Availability: OpenStep

Description forthcoming.



Instance Variables for NSScroller Class

_action

@protected SEL _action;
Availability: OpenStep

Warning the underscore at the start of the name of this instance variable indicates that, even though it is not technically private, it is intended for internal use within the package, and you should not use the variable in other code.

_arrowsPosition

@protected NSScrollArrowPosition _arrowsPosition;
Availability: OpenStep

Warning the underscore at the start of the name of this instance variable indicates that, even though it is not technically private, it is intended for internal use within the package, and you should not use the variable in other code.

_doubleValue

@protected double _doubleValue;
Availability: OpenStep

Warning the underscore at the start of the name of this instance variable indicates that, even though it is not technically private, it is intended for internal use within the package, and you should not use the variable in other code.

_hitPart

@protected NSScrollerPart _hitPart;
Availability: OpenStep

Warning the underscore at the start of the name of this instance variable indicates that, even though it is not technically private, it is intended for internal use within the package, and you should not use the variable in other code.

_knobProportion

@protected CGFloat _knobProportion;
Availability: OpenStep

Warning the underscore at the start of the name of this instance variable indicates that, even though it is not technically private, it is intended for internal use within the package, and you should not use the variable in other code.

_pendingKnobProportion

@protected CGFloat _pendingKnobProportion;
Availability: OpenStep

Warning the underscore at the start of the name of this instance variable indicates that, even though it is not technically private, it is intended for internal use within the package, and you should not use the variable in other code.

_target

@protected id _target;
Availability: OpenStep

Warning the underscore at the start of the name of this instance variable indicates that, even though it is not technically private, it is intended for internal use within the package, and you should not use the variable in other code.

_usableParts

@protected NSUsableScrollerParts _usableParts;
Availability: OpenStep

Warning the underscore at the start of the name of this instance variable indicates that, even though it is not technically private, it is intended for internal use within the package, and you should not use the variable in other code.

struct _scFlagsType

@protected struct _scFlagsType struct _scFlagsType;
Availability: OpenStep

Description forthcoming.





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