/** Moves focus to the last component in the previous row. */
protected void moveToPreviousRow() {
if (Debug.ON) Logger.dev("OFocusManager.moveToPreviousRow CALLED ");
int priorRank = focusedComponentIndex - 1;
boolean moved = false;
OFocusableComponent gainer = null;
int firstRank = 0;
if (priorRank >= firstRank) { // there is a previous component
int currentY = focusedComponent.getY();
boolean keepLooking = true;
for (; keepLooking && priorRank >= firstRank; priorRank--) {
OComponent previousComponent = (OComponent) focusableComponents.elementAt(priorRank);
if (previousComponent.getY() < currentY
&& previousComponent instanceof OFocusableComponent) {
gainer = (OFocusableComponent) previousComponent;
focusedComponentIndex = priorRank;
keepLooking = false;
moved = true;
}
}
}
if (moved) {
moveFocus(gainer);
} else // there is no prior row
{
OHandset.beep();
}
if (Debug.ON) Logger.dev("OFocusManager.moveToPreviousRow EXITTING ");
} // moveToPreviousRow
/** Moves focus to the first component in the next row. */
protected void moveToNextRow() {
if (Debug.ON) Logger.dev("OFocusManager.moveToNextRow CALLED ");
int nextRank = focusedComponentIndex + 1;
boolean moved = false;
OFocusableComponent gainer = null;
int lastRank = focusableComponents.size() - 1;
if (nextRank <= lastRank) { // there are more components
int currentY = focusedComponent.getY();
boolean keepLooking = true;
for (; keepLooking && nextRank <= lastRank; nextRank++) {
OFocusableComponent nextComponent =
(OFocusableComponent) focusableComponents.elementAt(nextRank);
if (nextComponent.getY() > currentY) { // component is in a later row
gainer = (OFocusableComponent) nextComponent;
focusedComponentIndex = nextRank;
keepLooking = false;
moved = true;
}
}
}
if (moved) {
moveFocus(gainer);
} else // there is no next row
{
OHandset.beep();
}
if (Debug.ON) Logger.dev("OFocusManager.moveToNextRow EXITTING ");
} // moveToNextRow
/**
* Processes a key press.
*
* <p>if the key pressed is the right or left key focus is changed appropriately. All other keys
* are passed to the component which currently has focus.
*
* @param keyCode Code of the key pressed.
*/
public void keyPressed(int keyCode) {
if (Debug.ON) Logger.dev("OFocusManager.keyPressed CALLED w/keyCode=" + keyCode);
//
// NOTE: Not all screens will have a focusedComponent
// therefore we shall check for null and ensure
// it can handle the keypress. Otherwise, we
// shall get the traverse directions
//
if (focusedComponent == null) return;
int directions = focusedComponent.getTraverseDirections();
if (keyCode == OAbstractScreen.RIGHT_KEY && (OFocusableComponent.RIGHT & directions) > 0) {
moveToNextField();
} else if (keyCode == OAbstractScreen.LEFT_KEY && (OFocusableComponent.LEFT & directions) > 0) {
moveToPreviousField();
} else if (keyCode == OAbstractScreen.DOWN_KEY && (OFocusableComponent.DOWN & directions) > 0) {
moveToNextField();
} else if (keyCode == OAbstractScreen.UP_KEY && (OFocusableComponent.UP & directions) > 0) {
moveToPreviousField();
} else // pass the key stroke to the component with focus
{
focusedComponent.keyPressed(keyCode);
}
if (Debug.ON) Logger.dev("OFocusManager.keyPressed EXITTING");
} // keyPressed
/**
* Moves the focus to the specified component.
*
* @param gainer The component gaining focus
*/
protected void moveFocus(OFocusableComponent gainer) {
if (Debug.ON) Logger.dev("@@@ OFocusManager.moveFocus ENTERED");
focusedComponent.setFocus(OFocusEvent.FOCUS_LOST);
gainer.setFocus(OFocusEvent.FOCUS_GAINED);
focusedComponent = gainer;
screen.adjustBodyOffset(gainer);
if (Debug.ON) Logger.dev("OFocusManager.moveFocus EXITTING");
} // moveFocus
/**
* Processes a left key press. if the current component is not the first component in the
* container then focus is passed to the component of rank 1 less than the current component
*/
protected void moveToPreviousField() {
if (Debug.ON) Logger.dev("OFocusManager.processLeftKeyPress CALLED ");
if (focusedComponentIndex > 0) {
OFocusableComponent previousComponent =
(OFocusableComponent) focusableComponents.elementAt(--focusedComponentIndex);
moveFocus((OFocusableComponent) previousComponent);
} else // first component, so merely beep
{
OHandset.beep();
}
if (Debug.ON) Logger.dev("OFocusManager.processLeftKeyPress EXITTING ");
} // moveToPreviousField
/**
* Processes a right key press. if the current component is not the last component in the
* container then focus is passed to the component of rank 1 greater than the current component.
*/
protected void moveToNextField() {
if (Debug.ON) Logger.dev("OFocusManager.processRightKeyPRessed CALLED ");
if (focusedComponentIndex
< focusableComponents.size()
- 1) { // not the last component, so find the next focusable component
OFocusableComponent nextComponent =
(OFocusableComponent) focusableComponents.elementAt(++focusedComponentIndex);
moveFocus((OFocusableComponent) nextComponent);
} else { // last focusable component, so merely beep
OHandset.beep();
}
if (Debug.ON) Logger.dev("OFocusManager.processRightKeyPress EXITTING ");
} // moveToNextField
/**
* Creates a new <code>OFocusManager</code> instance.
*
* <p><b>This constructor should only be called AFTER all components have been added to the
* screen. The object created by this constructor will not manage focus for any components added
* to the screen AFTER this constructor is called</b>
*
* @param container The container for which this object is to manage focus.
*/
public OFocusManager(OCompositeScreen screen) {
if (Debug.ON) Logger.dev("OFocusManager.ctor.1 ENTERED");
this.screen = screen;
bodyBegin = screen.getBodyRow();
bodyEnd = bodyBegin + screen.getBodyHeight();
// populate a vector of components which can have focus, which may be a
// subset of the components in the screen's container
OComponent[] components = ((OContainer) screen).getComponents();
for (int idx = 0; idx < components.length; idx++) {
OComponent component = components[idx];
if (!(component instanceof OContainer)) {
if (component instanceof OFocusableComponent) {
focusableComponents.addElement(component);
}
} else // component is itself a container, so we need to add its focusable
{ // components to the vector of all focusable components=
OComponent[] subComponents = ((OContainer) component).getComponents();
for (int idx2 = 0; idx2 < subComponents.length; idx2++) {
OComponent subComponent = subComponents[idx2];
if (subComponent instanceof OFocusableComponent) {
focusableComponents.addElement(subComponent);
}
}
}
}
// set the focused component to the first component
if (focusableComponents.size() > 0) {
focusedComponent = (OFocusableComponent) focusableComponents.elementAt(focusedComponentIndex);
focusedComponent.setFocus(OFocusEvent.FOCUS_GAINED);
}
if (Debug.ON) Logger.dev("OFocusManager.ctor.1 EXITTING");
} // constructor