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paperh18648 margl-907 margr0 margt0 margb0 fi0 ri0 ql sb0 f1 fs24 Copyright f3 'e3f1 1994 by NeXT Computer, Inc. All Rights Reserved.
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fs36 NSSlider
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fs28 f0 b fs24 Inherits From:tab b0 fs28 f1 NSControl : NSView : NSResponder : NSObject
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fs28 s6 f0 b fs24 Conforms To:tab b0 fs28 f1 NSCoding (NSResponder)
fi0 NSObject (NSObject)
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fs28 s7 fi-2771 f0 b fs24 Declared In:tab b0 fs28 f1 AppKit/NSSlider.h
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fs28 Class Description
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fs28 NSSlider is a type of NSControl with a sliding knob that can be moved to represent a value between a minimum and a maximum setting. A slider may be either horizontal or vertical, but its minimum value is always at the left or bottom end of the bar, and the maximum at the right or top. By default, an NSSlider is a continuous NSControl: It sends its action message to its target continuously while the user drags its knob. To configure an NSSlider to send its action only when the mouse is released, send b setContinuous:b0 (an NSControl method) with an argument of NO.
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fs28 An NSSlider can be configured to display an image, a title, or both, in the area behind its knob. An NSSlider's title can be drawn in any gray level or color, and in any font available. An NSSlider's value can be set programmatically with any of the standard NSControl value-setting methods, such as b setFloatValue:b0 .
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fs28 For more information, see the method descriptions in the NSSliderCell class specification.
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fs28 Setting the Cell Class
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fs28 fi-6552 + (Class)b cellClasstab b0 Returns the class last set in a b setCellClass:b0 message, or the NSSliderCell class if b setCellClass:b0 has never been called.
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fs28 fi-6552 + (void)b setCellClass:b0 (Class)i classIdi0 tab Sets the class of NSCell used in the NSSlider.
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fs28 Modifying an NSSlider'27s Appearance
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fs28 fi-6552 {f3 -} (NSImage *)b imageb0 tab Returns the image within the NSSlider.
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fs28 fi-6552 {f3 -} (int)b isVerticalb0 tab Returns 1 if the NSSlider is vertical, 0 if horizontal, -1 if unknown.
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fs28 fi-6552 {f3 -} (float)b knobThicknessb0 tab Returns the knob'27s thickness as a float value (width if horizontal slider, height if vertical slider).
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fs28 fi-6552 {f3 -} (void)b setImage:b0 (NSImage *)i backgroundImagei0 tab Sets the image within the NSSlider to i backgroundImagei0 .
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fs28 fi-6552 {f3 -} (void)b setKnobThickness:b0 (float)i aFloati0 tab Sets the knob'27s thickness (its width if the slider is horizontal, height if vertical) to i aFloati0 , expressed in units of the NSSlider'27s coordinate system.
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fs28 fi-6552 {f3 -} (void)b setTitle:b0 (NSString *)i aStringi0 tab Sets the title within the NSSlider to a copy of i aStringi0 .
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fs28 fi-6552 {f3 -} (void)b setTitleCell:b0 (NSCell *)i aCelli0 tab Sets the NSCell (or subclass thereof) object used to draw the title within the NSSlider. The cell object should ideally be an instance of NSTextFieldCell or one of its subclasses.
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fs28 fi-6552 {f3 -} (void)b setTitleColor:b0 (NSColor *)i aColori0 tab Sets the color of text in the title to i aColori0 .
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fs28 fi-6552 {f3 -} (void)b setTitleFont:b0 (NSFont *)i fontObjecti0 tab Sets the NSFont object used for the title within the NSSlider.
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fs28 fi-6552 {f3 -} (NSString *)b titleb0 tab Returns the title within the NSSlider.
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fs28 fi-6552 {f3 -} (id)b titleCellb0 tab Returns the NSCell (or subclass thereof) object used to draw the title within the NSSlider.
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fs28 fi-6552 {f3 -} (NSColor *)b titleColorb0 tab Returns the color of text in the title.
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fs28 fi-6552 {f3 -} (NSFont *)b titleFontb0 tab Returns the NSFont object used in drawing the title within the NSSlider.
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fs28 Setting and Getting Value Limits
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fs28 fi-6552 {f3 -} (double)b maxValueb0 tab Returns theNSSlider'27s maximum value.
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fs28 fi-6552 {f3 -} (double)b minValueb0 tab Returns the NSSlider'27s minimum value.
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fs28 fi-6552 {f3 -} (void)b setMaxValue:b0 (double)i aDoublei0 tab Sets the NSSlider'27s maximum value to i aDoublei0 .
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fs28 fi-6552 {f3 -} (void)b setMinValue:b0 (double)i aDoublei0 tab Sets the NSSlider'27s minimum value to i aDoublei0 .
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fs28 Handling Events
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fs28 fi-6552 {f3 -} (BOOL)b acceptsFirstMouse:b0 (NSEvent *)i theEventi0 tab Returns YES by default, since NSSliders always accept a mouse-down event that activates a window, whether or not the NSSlider is enabled. Override this if you want different behavior.
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