private boolean onArrowLeft(KeyboardEvent event) {
if (noContentCheck()) return true;
final int count = model.getRowCount();
if (hotPointY < 0 || hotPointY >= count) {
environment.hint(Hints.EMPTY_LINE);
return true;
}
if (hotPointX < initialHotPointX) hotPointX = initialHotPointX;
if (getColUnderPos(hotPointX) < 0) hotPointX = initialHotPointX;
final int currentCol = getColUnderPos(hotPointX);
final int currentColWidth = colWidth[currentCol];
final int colStartPos = getColStartPos(currentCol);
final TableCell c =
new TableCell(
hotPointX - colStartPos,
cellShift,
currentColWidth,
appearance.getCellText(model, currentCol, hotPointY));
if (!c.movePrev()) {
if (currentCol <= 0) {
environment.hint(Hints.TABLE_BEGIN_OF_ROW);
return true;
}
final String prevColText = appearance.getCellText(model, currentCol - 1, hotPointY);
final int prevColWidth = colWidth[currentCol - 1];
final int prevColStartPos = getColStartPos(currentCol - 1);
if (prevColText.length() > prevColWidth) {
hotPointX = prevColStartPos + prevColWidth;
cellShift = prevColText.length() - prevColWidth;
} else {
cellShift = 0;
hotPointX = prevColStartPos + prevColText.length();
}
environment.hint(Hints.TABLE_END_OF_COL);
environment.onAreaNewContent(this);
environment.onAreaNewHotPoint(this);
return true;
}
cellShift = c.shift;
hotPointX = c.pos + colStartPos;
if (c.pos == c.width) // Should never happen;
environment.hint(Hints.TABLE_END_OF_COL);
else environment.sayLetter(c.line.charAt(c.pos + c.shift));
environment.onAreaNewContent(this);
environment.onAreaNewHotPoint(this);
return true;
}
private boolean onArrowRight(KeyboardEvent event) {
if (noContentCheck()) return true;
final int count = model.getRowCount();
if (hotPointY < 0 || hotPointY >= count) {
environment.hint(Hints.EMPTY_LINE);
return true;
}
// Checking that hot point not before proper line begin;
if (hotPointX < initialHotPointX) hotPointX = initialHotPointX;
if (getColUnderPos(hotPointX) < 0) hotPointX = initialHotPointX;
final int currentCol = getColUnderPos(hotPointX);
final int currentColWidth = colWidth[currentCol];
final int colStartPos = getColStartPos(currentCol);
final int nextColStartPos = colStartPos + colWidth[currentCol] + 1;
final TableCell c =
new TableCell(
hotPointX - colStartPos,
cellShift,
currentColWidth,
appearance.getCellText(model, currentCol, hotPointY));
if (!c.moveNext()) {
if (currentCol + 1 >= colWidth.length) {
environment.hint(Hints.TABLE_END_OF_ROW);
return true;
}
cellShift = 0;
hotPointX = nextColStartPos;
final String nextColText = appearance.getCellText(model, currentCol + 1, hotPointY);
if (!nextColText.isEmpty()) environment.sayLetter(nextColText.charAt(0));
else
environment.hint(
currentCol + 2 < colWidth.length ? Hints.TABLE_END_OF_COL : Hints.TABLE_END_OF_ROW);
environment.onAreaNewContent(this);
environment.onAreaNewHotPoint(this);
return true;
}
cellShift = c.shift;
hotPointX = c.pos + colStartPos;
if (c.pos + c.shift >= c.line.length())
environment.hint(
currentCol + 1 < colWidth.length ? Hints.TABLE_END_OF_COL : Hints.TABLE_END_OF_ROW);
else environment.sayLetter(c.line.charAt(c.pos + c.shift));
environment.onAreaNewContent(this);
environment.onAreaNewHotPoint(this);
return true;
}
/**
* Refreshes the content of the list. This method calls {@code refresh()} method of the model and
* displays new items. It does not produce any speech announcement of the change. HotPointY is
* preserved if it is possible (meaning, the new number of lines not less than old value of
* hotPointY), but hotPointX is moved to the beginning of the line.
*/
public void refresh() {
model.refresh();
final int count = model.getItemCount();
if (count == 0) {
hotPointX = 0;
hotPointY = 0;
environment.onAreaNewContent(this);
environment.onAreaNewHotPoint(this);
return;
}
hotPointY = hotPointY < count ? hotPointY : count - 1;
final Object item = model.getItem(hotPointY);
if (item != null) hotPointX = appearance.getObservableLeftBound(item);
else hotPointX = 0;
environment.onAreaNewContent(this);
environment.onAreaNewHotPoint(this);
}
protected boolean onInsert(KeyboardEvent event) {
final int index = selectedIndex();
if (index < 0) return false;
if (!model.toggleMark(index)) return false;
environment.onAreaNewContent(this);
if (hotPointY + 1 < getLineCount()) {
++hotPointY;
onNewHotPointY(false);
}
return true;
}
public void refresh(boolean refreshModel) {
if (model == null) {
colWidth = null;
cellShift = 0;
hotPointX = 0;
hotPointY = 0;
environment.onAreaNewContent(this);
environment.onAreaNewHotPoint(this);
return;
}
if (refreshModel) model.refresh();
final int colCount = model.getColCount();
final int rowCount = model.getRowCount();
if (colCount <= 0 || rowCount <= 0) {
colWidth = null;
cellShift = 0;
hotPointX = 0;
hotPointY = 0;
environment.onAreaNewContent(this);
environment.onAreaNewHotPoint(this);
return;
}
initialHotPointX = appearance.getInitialHotPointX(model);
colWidth = new int[colCount];
int totalWidth = initialHotPointX;
for (int i = 0; i < colCount; ++i) {
final int width = appearance.getColWidth(model, i);
colWidth[i] = width >= 1 ? width : 1;
totalWidth += (colWidth[i] + 1);
}
if (hotPointY > rowCount) hotPointY = rowCount;
if (hotPointY < rowCount && hotPointX >= totalWidth)
hotPointX =
totalWidth - 1; // totalWidth may not be zero as always we have at least one column here;
if (hotPointY == rowCount) hotPointX = 0;
environment.onAreaNewContent(this);
environment.onAreaNewHotPoint(this);
}
