CwTrackBar CwTrackBar provides a visual means of representing a value in a range of values. A slider can be positioned at one of a number of ticks to express the value. Protocol clearSelection Clear the current selection in the receiver. increment Answer the number of ticks the slider will move when the left orright arrows are pressed. increment: anInteger Set the number of ticks the slider will move when the left or right arrows are pressed. maximum Answer the largest value of the slider. maximum: anInteger Set the largest value of the slider. minimum Answer the smallest value of the slider. minimum: anInteger Set the smallest value of the slider. orientation Answer whether the slider is oriented horizontally or vertically. XmHORIZONTAL - The slider moves horizontally. XmVERTICAL - The slider moves vertically. orientation: anInteger Set whether the slider is oriented horizontally or vertically. pageIncrement Answer the number of ticks the sider will move when the page up or page down keys are pressed or when the mouse is clicked to the left or right of the slider. pageIncrement: anInteger Set the number of ticks the sider will move when the page up or page down keys are pressed or when the mouse is clicked to the left or right of the slider. selection Answer the start and end of the select range in the slider, if the select range is enabled. selection: aPoint Set the start and end of the select range in the slider, if the select range is enabled. showSelection Answer whether the slider can have a select range. showSelection: aBoolean Set whether the slider can have a select range. showTickBottom Answer true if tick marks are positioned along the bottom of the slider if it is horizontal, or along the right side if it is vertical. Answer false if no tick marks are placed on the bottom/right. showTickBottom: aBoolean Set where the tick marks displayed on the receiver are positioned. If true, tick marks are positioned along the bottom of the slider if it is horizontal, or along the right side if it is vertical. If false, no tick marks are placed on the bottom/right. showTickTop Answer true if tick marks are positioned along the top of the slider if it is horizontal, or along the left side if it is vertical. Answer false ifno tick marks are placed on the top/left. showTickTop: aBoolean Set where the tick marks displayed on the receiver are positioned . If true, tick marks are positioned along the top of the slider if it is horizontal, or along the left side if it is vertical. If false, no tick marks are placed on the top/left. tickFrequency Answer the frequency of the tick marks on a slider in relation to its range tickFrequency: anInteger Set the frequency of the tick marks on a slider in relation to its range value Answer the current position of the slider. value: anInteger Set the current position of the slider. Callbacks and Events The track bar has callbacks specific to it. drag executed when the slider is moved either by clicking or using the keyboard. Callback data object is CwValueCallbackData. valueChanged executed when the slider is released while being dragged. Callback data object is CwValueCallbackData. Example The followind code snippet creates a track bar. trackBar := CwTrackBar createWidget: 'TrackBar' "$NON-NLS$" parent: shell argBlock: nil. trackBar manageChild.
