private VisualItem PutTextToVisualItem(ItemCanvasCursor CanvasCursor, string Text, int Pos)
{
var item = CanvasCursor.GetVisualItem();
var absPos = item.StrColNum + Pos - 1;
var locText = new LocatedString(absPos, Text);
item.ApplyText(locText);
return(item);
}
private void Canvas_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
var pos = e.GetPosition(this.Canvas);
var loc = pos.CanvasPosToScreenLoc(this.CharDim);
var canvasCursor = VisualItems.FindVisualItem(loc);
if (canvasCursor.VisualCursor != null)
{
this.CaretCursor = canvasCursor;
this.CanvasCaret.StartBlink(this.CaretCursor);
e.Handled = true;
}
}
public ItemCanvasCursor PutText_AdvanceCaret(
ItemCanvasCursor Cursor, string Text, bool Reuse = true)
{
ItemCanvasCursor cursor = Cursor;
VisualItem item = null;
var vi = cursor.GetVisualItem();
if (vi?.IsInputItem == true)
{
item = PutTextToVisualItem(cursor, Text, cursor.Position);
cursor = cursor.AdvanceRight(HowAdvance.NextEntryField, Reuse);
}
return(cursor);
}
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());
}
}
}
