private bool backspaceOrForwardDelete(android.view.View view, android.text.Editable
content, int keyCode, android.view.KeyEvent @event, bool isForwardDelete)
{
// Ensure the key event does not have modifiers except ALT or SHIFT.
if (!android.view.KeyEvent.metaStateHasNoModifiers(@event.getMetaState() & ~(android.view.KeyEvent
.META_SHIFT_MASK | android.view.KeyEvent.META_ALT_MASK)))
{
return false;
}
// If there is a current selection, delete it.
if (deleteSelection(view, content))
{
return true;
}
// Alt+Backspace or Alt+ForwardDelete deletes the current line, if possible.
if (@event.isAltPressed() || getMetaState(content, META_ALT_ON) == 1)
{
if (deleteLine(view, content))
{
return true;
}
}
// Delete a character.
int start = android.text.Selection.getSelectionEnd(content);
int end;
if (isForwardDelete || @event.isShiftPressed() || getMetaState(content, META_SHIFT_ON
) == 1)
{
end = android.text.TextUtils.getOffsetAfter(content, start);
}
else
{
end = android.text.TextUtils.getOffsetBefore(content, start);
}
if (start != end)
{
content.delete(System.Math.Min(start, end), System.Math.Max(start, end));
return true;
}
return false;
}
/// <summary>
/// You can call this function yourself to have the scroll view perform
/// scrolling from a key event, just as if the event had been dispatched to
/// it by the view hierarchy.
/// </summary>
/// <remarks>
/// You can call this function yourself to have the scroll view perform
/// scrolling from a key event, just as if the event had been dispatched to
/// it by the view hierarchy.
/// </remarks>
/// <param name="event">The key event to execute.</param>
/// <returns>Return true if the event was handled, else false.</returns>
public virtual bool executeKeyEvent(android.view.KeyEvent @event)
{
mTempRect.setEmpty();
if (!canScroll())
{
if (isFocused())
{
android.view.View currentFocused = findFocus();
if (currentFocused == this)
{
currentFocused = null;
}
android.view.View nextFocused = android.view.FocusFinder.getInstance().findNextFocus
(this, currentFocused, android.view.View.FOCUS_RIGHT);
return nextFocused != null && nextFocused != this && nextFocused.requestFocus(android.view.View
.FOCUS_RIGHT);
}
return false;
}
bool handled = false;
if (@event.getAction() == android.view.KeyEvent.ACTION_DOWN)
{
switch (@event.getKeyCode())
{
case android.view.KeyEvent.KEYCODE_DPAD_LEFT:
{
if ([email protected]())
{
handled = arrowScroll(android.view.View.FOCUS_LEFT);
}
else
{
handled = fullScroll(android.view.View.FOCUS_LEFT);
}
break;
}
case android.view.KeyEvent.KEYCODE_DPAD_RIGHT:
{
if ([email protected]())
{
handled = arrowScroll(android.view.View.FOCUS_RIGHT);
}
else
{
handled = fullScroll(android.view.View.FOCUS_RIGHT);
}
break;
}
case android.view.KeyEvent.KEYCODE_SPACE:
{
pageScroll(@event.isShiftPressed() ? android.view.View.FOCUS_LEFT : android.view.View
.FOCUS_RIGHT);
break;
}
}
}
return handled;
}
