Two horizontal frames are scrolling on the screen

Screen has two managers class horizontal scrolling with Manager.HORIZONTAL_SCROLL, while second scroll crib focus arrived at the end of eat, automatically above the nursery items scroll horizontally.

Example:

First manager has 10 Articles and under second Manager has 10 items, first I scroll down and focus will be on the second element of the first nursery, now I just happened focus navigation 10th element of the second Manager of the articles above begins scrolling.

This also happens on Simulator and the device. I tested on 5.0, 6.0 and 7.0 same question is there.

Sample code sinppet:

 

HorizontalFieldManager hfmOuter = HorizontalFieldManager(FOCUSABLE | nouveau Manager.HORIZONTAL_SCROLL);

for (int i = 0; i)< 10;="" i++)="">
hfmOuter.add (new LabelField ("TITLE" + i, FOCUSABLE));
}
Add (hfmOuter);

HorizontalFieldManager hfmOuter1 = HorizontalFieldManager(FOCUSABLE | nouveau Manager.HORIZONTAL_SCROLL);

for (int i = 0; i)< 10;="" i++)="">
hfmOuter1.add (new LabelField ("NAME" + i, FOCUSABLE));
}
Add (hfmOuter1);

If I understand this problem, there are two potential problems:

(a) when scrolling horizontally from the second Manager, you don't want to update to leave Manager - you want rather than scrolling to stop.

Here is a code to do this:

        protected boolean navigationMovement(int dx, int dy, int status, int time) {
                int focusIndex = getFieldWithFocusIndex();
                if ( focusIndex == 0 && dx < 0 && dy == 0 ) {
                        // scrolling left but at beginning
                        return true;
                }
                if ( focusIndex == this.getFieldCount() - 1 && dx > 0 && dy == 0 ) {
                        // scrolling right but at end
                        return true;
                }
                return super.navigationMovement(dx, dy, status, time);
        }

The second potential problem is that you do not want scrolling starting with the "end" of the first Manager, instead you want to return to the item currently selected on the HFM first.  It's a problem more complicated - you keep an indication of the field in which it was (let's call it the selected field) and when the focus returns to the Manager, set the Focus to the selected entry.

Assuming that you retain this indicator selected, then you override onFocus to set the focus to the selected item, code should look like this:

        protected void onFocus(int direction) {
            if ( direction != 0 && currentlySelectedField != null ) {
                UiApplication.getUiApplication().invokeLater(new Runnable() {
                    public void run() {
                        try {
                            currentlySelectedField ();
                        } catch (Throwable t) {
                            LibraryRepository.logEventError("GalleryVoucher Focus problem: " + t.toString());
                        }
                    }
                });
            } else {
                super.onFocus(direction);
            }
        }

Tags: BlackBerry Developers

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