public override void PaintScreen(List <ShowItemBase> ShowItemList)
{
this.ShowItemList = ShowItemList;
base.PaintScreen(ShowItemList);
// find the first field on the screen.
var cursor = VisualItems.FirstInputItem();
if (cursor != null)
{
this.CaretCursor = new ItemCanvasCursor(cursor);
var item = cursor.GetVisualItem();
CanvasCaret.StartBlink(item, item.StrLoc, "_");
}
}
private void Item_PreviewKeyDown(object sender, KeyEventArgs e)
{
string keyText = TextCanvasLib.Ext.KeyExt.ToTextInput(e.Key);
if (keyText != null)
{
this.CaretCursor = PutText_AdvanceCaret(this.CaretCursor, keyText);
this.CanvasCaret.StartBlink(this.CaretCursor);
e.Handled = true;
}
else if (e.Key == Key.Tab)
{
if (Keyboard.IsKeyDown(Key.LeftShift) == false)
{
this.CaretCursor = this.CaretCursor.NextInputItem();
}
else
{
this.CaretCursor = this.CaretCursor.PrevInputItem();
}
var item = this.CaretCursor.GetVisualItem();
CanvasCaret.SetLocation(item.StrLoc);
e.Handled = true;
}
else if (e.Key == Key.Down)
{
e.Handled = true;
}
else if (e.Key == Key.Enter)
{
CanvasCaret.BlinkSymbol(this.CaretLoc, "_");
}
else if (e.Key == Key.Right)
{
this.CaretCursor.AdvanceRight(HowAdvance.NextColumn);
this.CanvasCaret.StartBlink(this.CaretCursor);
e.Handled = true;
}
else if (e.Key == Key.Left)
{
this.CaretCursor.AdvanceLeft(HowAdvance.NextColumn);
this.CanvasCaret.StartBlink(this.CaretCursor);
e.Handled = true;
}
else if (e.Key == Key.Up)
{
e.Handled = true;
}
else if (e.Key == Key.Back)
{
PutText(" ", this.CaretLoc);
CanvasCaret.BlinkSymbol(this.CaretLoc, "_");
e.Handled = true;
}
else if (e.Key == Key.Delete)
{
CanvasCaret.BlinkSymbol(this.CaretLoc, "_");
e.Handled = true;
}
// f3-exit. Signal the screen exit event.
else if (e.Key == Key.F3)
{
if (this.ScreenExitEvent != null)
{
this.ScreenExitEvent(this, new EventArgs());
}
}
}
