Apple PowerBook 520 Technical Information download pdf (Page 105)

CHAPTER 5

Software

Control Strip Module Reference 91

The SBTrackSlider routine displays an unlabeled slider above the module’s display

rectangle. You can use the slider for displaying and setting the state of an arbitrary

parameter. The parameter ModuleRect contains a pointer to the module’s display

rectangle; ticksOnSlider is the upper bounds of the value returned by the slider; and

initialValue is the starting position (0 to ticksOnSlider–1). When the user

releases the mouse button, SBTrackSlider returns the ﬁnal position.

SBShowHelpString 5

You can use the SBShowHelpString routine to display a help balloon.

pascal OSErr SBShowHelpString(const Rect *moduleRect,

StringPtr helpString);

The SBShowHelpString routine displays a module’s help balloon. The module passes

a pointer to its display rectangle and a pointer to a Pascal string, and the routine displays

the balloon if possible. If the help string has a length of 0 or the Help Manager is unable

to display a balloon, an error result is returned. If SBShowHelpString successfully

displays the help balloon, it returns a result of 0.

SBGetBarGraphWidth 5

You can use the SBGetBarGraphWidth routine to ﬁnd out the how wide a bar graph

drawn by SBDrawBarGraph (described next) will be so that a module can calculate its

display width.

pascal short SBGetBarGraphWidth(short barCount);

The SBGetBarGraphWidth routine returns the width of a bar graph containing

barCount segments. If barCount has a value less than 0, the SBGetBarGraphWidth

routine returns a width of 0.

SBDrawBarGraph 5

You can use the SBDrawBarGraph routine to draw a bar graph.

pascal void SBDrawBarGraph(short level, short barCount,

short direction,

Point barGraphTopLeft);

1 2 ... 100 101 102 103 104 105 106 107 108 109 110 ... 143 144

No comments

Apple PowerBook 520 Technical Information Page 105