Appendix A: QTRACKBAR

QTRACKBAR Component

QTrackBar is a track bar control used to represent a position along a continuum using a slider and, optionally, tick marks.

QTrackBar Properties

Field	Type	R/W	Default
Align	INTEGER	RW	alNone
	Align determines how the control aligns within its parent control.
Cursor	INTEGER	RW	crDefault
Enabled	INTEGER	RW	True
Frequency	INTEGER	RW
	Frequency specifies the increment between tick marks on the trackbar.
Handle	INTEGER	R
Height	INTEGER	RW
Hint	STRING	RW
Left	INTEGER	RW	0
LineSize	INTEGER	RW	1
	LineSize is the amount the value of Position changes when the user presses the arrow keys.
Max	INTEGER	RW	10
	Max specifies the maximum Position of the trackbar.
Min	INTEGER	RW	0
	Min specifies the minimum Position of the trackbar.
Orientation	INTEGER	RW	tbHorizontal
	Orientation specifies whether the trackbar is horizontal or vertical. 0 = tbHorizontal -- Min position is on the left, Max is on the right. 1 = tbVertical -- Min position is on the top, Max is on the bottom.
PageSize	INTEGER	RW	2
	PageSize specifies the amount Position is changed when the PageUp or PageDown key is pressed, or when the bar is clicked.
Parent	QFORM/QPANEL/QTABCONTROL	W
PopupMenu	QPOPUPMENU	W
Position	INTEGER	RW
	Position contains the current position of the slider.
SelEnd	INTEGER	RW
	SelEnd specifies the position of the end point of the selection range.
SelStart	INTEGER	RW
	SelStart specifies the position of the starting point of the selection range.
ShowHint	INTEGER	RW	False
TabOrder	INTEGER	RW
TickMarks	INTEGER	RW	tmBottomRight
	TickMarks specifies the location of the tick marks. 0 = tmBottomRight -- Tick marks are on the bottom or right of the trackbar depending on the value of Orientation. 1 = tmTopLeft -- Tick marks are on the top or left of the trackbar depending on the value of Orientation. 2 = tmBoth -- Tick marks are on both sides of the trackbar.
TickStyle	INTEGER	RW	tsAuto
	TickStyle specifies how tick marks are place on the trackbar. 0 = tsNone -- No tick marks are displayed. 1 = tsAuto -- Trackbar displays tick marks automatically for each increment in its range. 2 = tsManual -- Trackbar displays tick marks at either end. Use SetTick to set a tick in other positions
Top	INTEGER	RW	0
Width	INTEGER	RW
Visible	INTEGER	RW	True

QTrackBar Methods

Method	Type	Description	Params
SetTick	SUB (Pos%)	Set a tick mark at Pos%	1

QTrackBar Events

Event	Type	Occurs when...	Params
OnChange	VOID	Track bar changes	0

QTrackBar Examples

CREATE Form AS QForm
  Center
  CREATE TrackBar AS QTrackBar
    ' Initialize track bar
  END CREATE
  ShowModal
END CREATE

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