HasScrolling

PageDown PageLeft PageRight PageUp ScrollToBeginning ScrollToBottom ScrollToEnd ScrollToLeft ScrollToRight ScrollToTop

Attributes

Class HasScrolling defines no new attributes.

Fields

Define Class HasScrolling;
// anything that scrolls
    mixes in with Viewable;
//  has no dispatcher hintdata;

    operation PageDown();
        // call to scroll down by 3/4 of object bounds; override to change scroll amount
    operation PageLeft();
        // call to scroll left by 3/4 of object bounds; override to change scroll amount
    operation PageRight();
        // call to scroll right by 3/4 of object bounds; override to change scroll amount
    operation PageUp();
        // call to scroll up by 3/4 of object bounds; override to change scroll amount
    operation ScrollToBeginning(), noFail;
        // call to set scroll position to beginning;
        // calls ScrollToTop and ScrollToLeft;
        // rarely override (override ScrollToTop and/or ScrollToLeft instead)
    operation ScrollToEnd(), noFail;
        // call to set scroll position to end;
        // calls ScrollToBottom and ScrollToRight
        // rarely override (override ScrollToBottom and/or ScrollToRight instead)
    operation ScrollToTop(), noFail;
        // call to set scroll position to top edge;
        // must override or option-tap on scroll up arrow will do nothing
    operation ScrollToBottom(), noFail;
        // call to set scroll position to bottom edge;
        // must override or option-tap on scroll down arrow will do nothing
    operation ScrollToLeft(), noFail;
        // call to set scroll position to left edge;
        // must override or option-tap on scroll left arrow will do nothing
    operation ScrollToRight(), noFail;
        // call to set scroll position to right edge;
        // must override or option-tap on scroll right arrow will do nothing

    // ScrollTrack?
    // AtEnd?
    // AtBeginning?
    // AtTop?
    // AtLeft?
    // AtBottom?
    // AtRight?
    // ScrollArrowFlags?
end class;