protected override bool ProcessDialogKey(Keys keyData)
{
switch (keyData)
{
case Keys.Right:
if ((int)(char_index_at_caret - screen_first_char) == text_area.CharsFitted - 1)
{
//нужен скролл на строку вниз
scroll_line_down();
}
caret_set_position(char_index_at_caret + 1);
selection_reset(true);
return(true);
case Keys.Left:
if (char_index_at_caret == screen_first_char)
{
//скролл вверх
scroll_line_up();
}
selection_reset(true);
caret_set_position(char_index_at_caret - 1);
return(true);
case Keys.Down:
var target_down_point = Caret.GetCaretPos();
target_down_point.Y = target_down_point.Y + (int)Math.Ceiling(text_area.Font.GetHeight());
if (text_area.GetLineBounds(text_area.LinesCount - 1).Y < target_down_point.Y)
{
//скролл вниз
scroll_line_down();
//target_down_point = Caret.GetCaretPos();
}
caret_set_position(target_down_point);
selection_reset(true);
return(true);
case Keys.Up:
var target_up_point_1 = Caret.GetCaretPos();
var target_up_point_2 = Caret.GetCaretPos();
target_up_point_2.Y = target_up_point_1.Y - (int)Math.Ceiling(text_area.Font.GetHeight());
if (target_up_point_2.Y < text_area.Bounds.Y)
{
scroll_line_up();
target_up_point_2 = target_up_point_1;
}
caret_set_position(target_up_point_2);
selection_reset(true);
return(true);
case Keys.PageUp:
selection_reset();
scroll_page_up();
caret_set_position(screen_first_char);
return(true);
case Keys.PageDown:
selection_reset();
scroll_page_down();
caret_set_position(screen_first_char);
return(true);
case Keys.Home:
selection_reset();
scroll_to_char(0);
caret_set_position(screen_first_char);
return(true);
case Keys.End:
selection_reset();
var target_char = text_provider.GetCharsCount();
target_char = target_char - 16;
if (target_char < 0)
{
target_char = 0;
}
scroll_to_char(target_char);
caret_set_position(target_char);
return(true);
case Keys.Shift | Keys.Right:
if (selection_last == char_index_at_caret)
{
//продолжаем выделение
selection_set(selection_first, char_index_at_caret + 1);
}
else
{
//начинаем новое
selection_set(char_index_at_caret, char_index_at_caret + 1);
}
if ((int)(char_index_at_caret - screen_first_char) == text_area.CharsFitted - 1)
{
//нужен скролл на строку вниз
scroll_line_down();
}
caret_set_position(char_index_at_caret + 1);
return(true);
case Keys.Shift | Keys.Left:
if (selection_first == char_index_at_caret)
{
//продолжаем выделение влево
selection_set(char_index_at_caret - 1, selection_last);
}
else
{
//начианем новое
selection_set(char_index_at_caret - 1, char_index_at_caret);
}
if (char_index_at_caret == screen_first_char)
{
//скролл вверх
scroll_line_up();
}
caret_set_position(char_index_at_caret - 1);
return(true);
case Keys.Shift | Keys.Down:
var old_char_caret = char_index_at_caret;
var target_down_point_shift = Caret.GetCaretPos();
target_down_point_shift.Y = target_down_point_shift.Y + (int)Math.Ceiling(text_area.Font.GetHeight());
if (text_area.GetLineBounds(text_area.LinesCount - 1).Y < target_down_point_shift.Y)
{
//скролл вниз
scroll_line_down();
//target_down_point = Caret.GetCaretPos();
}
caret_set_position(target_down_point_shift);
if (selection_last == old_char_caret)
{
//продолжаем выделение
selection_set(selection_first, char_index_at_caret);
}
else
{
//начинаем новое
selection_set(old_char_caret, char_index_at_caret);
}
return(true);
case Keys.Shift | Keys.Up:
var old_char_caret_2 = char_index_at_caret;
var target_up_point_1_shift = Caret.GetCaretPos();
var target_up_point_2_shift = Caret.GetCaretPos();
target_up_point_2_shift.Y = target_up_point_1_shift.Y - (int)Math.Ceiling(text_area.Font.GetHeight());
if (target_up_point_2_shift.Y < text_area.Bounds.Y)
{
scroll_line_up();
target_up_point_2_shift = target_up_point_1_shift;
}
caret_set_position(target_up_point_2_shift);
if (selection_first == old_char_caret_2)
{
//продолжаем выделение
selection_set(char_index_at_caret, selection_last);
}
else
{
//начинаем новое
selection_set(char_index_at_caret, old_char_caret_2);
}
return(true);
//case Keys.S:
// scroll_line_down();
// return true;
//case Keys.W:
// scroll_line_up();
// return true;
//case Keys.D:
// scroll_page_down();
// return true;
//case Keys.E:
// scroll_page_up();
// return true;
//case Keys.T:
// text_area.FindPreviousLineStart(CreateGraphics());
// return true;
/*
* editing
*/
case Keys.Delete:
if (EditEnable)
{
text_edit_provider.DeleteChars(char_index_at_caret, 1);
Invalidate();
}
return(true);
case Keys.Back:
if ((EditEnable) && (char_index_at_caret >= 1))
{
text_edit_provider.DeleteChars(char_index_at_caret - 1, 1);
Refresh();
caret_set_position(char_index_at_caret - 1);
}
return(true);
case Keys.Control | Keys.Delete:
if ((EditEnable) && (selection_last - selection_first > 0))
{
text_edit_provider.DeleteChars(selection_first, selection_last - selection_first);
Invalidate();
}
return(true);
}
return(base.ProcessDialogKey(keyData));
}
protected override void OnLostFocus(EventArgs e)
{
Caret.DestroyCaret();
base.OnLostFocus(e);
}