public void Undo()
{
TextWidgetUndoData undoData = (TextWidgetUndoData)undoBuffer.GetPrevUndoObject();
if (undoData != null)
{
undoData.ExtractData(this);
FixBarPosition(DesiredXPositionOnLine.Set);
}
}
public override void OnKeyDown(KeyEventArgs keyEvent)
{
RestartBarFlash();
bool SetDesiredBarPosition = true;
bool turnOffSelection = false;
if (!ShiftKeyIsDown(keyEvent))
{
if (keyEvent.Control)
{
// don't let control keys get into the stream
keyEvent.SuppressKeyPress = true;
keyEvent.Handled = true;
}
else if (Selecting)
{
turnOffSelection = true;
}
}
switch (keyEvent.KeyCode)
{
case Keys.Escape:
if (Selecting)
{
turnOffSelection = true;
keyEvent.SuppressKeyPress = true;
keyEvent.Handled = true;
}
break;
case Keys.Left:
StartSelectionIfRequired(keyEvent);
if (keyEvent.Control)
{
GotoBeginingOfPreviousToken();
}
else if (CharIndexToInsertBefore > 0)
{
if (turnOffSelection)
{
CharIndexToInsertBefore = Math.Min(CharIndexToInsertBefore, SelectionIndexToStartBefore);
}
else
{
CharIndexToInsertBefore--;
}
}
keyEvent.SuppressKeyPress = true;
keyEvent.Handled = true;
break;
case Keys.Right:
StartSelectionIfRequired(keyEvent);
if (keyEvent.Control)
{
GotoBeginingOfNextToken();
}
else if (CharIndexToInsertBefore < internalTextWidget.Text.Length)
{
if (turnOffSelection)
{
CharIndexToInsertBefore = Math.Max(CharIndexToInsertBefore, SelectionIndexToStartBefore);
}
else
{
CharIndexToInsertBefore++;
}
}
keyEvent.SuppressKeyPress = true;
keyEvent.Handled = true;
break;
case Keys.Up:
StartSelectionIfRequired(keyEvent);
if (turnOffSelection)
{
CharIndexToInsertBefore = Math.Min(CharIndexToInsertBefore, SelectionIndexToStartBefore);
}
GotoLineAbove();
SetDesiredBarPosition = false;
keyEvent.SuppressKeyPress = true;
keyEvent.Handled = true;
break;
case Keys.Down:
StartSelectionIfRequired(keyEvent);
if (turnOffSelection)
{
CharIndexToInsertBefore = Math.Max(CharIndexToInsertBefore, SelectionIndexToStartBefore);
}
GotoLineBelow();
SetDesiredBarPosition = false;
keyEvent.SuppressKeyPress = true;
keyEvent.Handled = true;
break;
case Keys.Space:
keyEvent.Handled = true;
break;
case Keys.End:
StartSelectionIfRequired(keyEvent);
if (keyEvent.Control)
{
CharIndexToInsertBefore = internalTextWidget.Text.Length;
}
else
{
GotoEndOfCurrentLine();
}
keyEvent.SuppressKeyPress = true;
keyEvent.Handled = true;
break;
case Keys.Home:
StartSelectionIfRequired(keyEvent);
if (keyEvent.Control)
{
CharIndexToInsertBefore = 0;
}
else
{
GotoStartOfCurrentLine();
}
keyEvent.SuppressKeyPress = true;
keyEvent.Handled = true;
break;
case Keys.Back:
if (!Selecting &&
CharIndexToInsertBefore > 0)
{
SelectionIndexToStartBefore = CharIndexToInsertBefore - 1;
Selecting = true;
}
DeleteSelection();
keyEvent.Handled = true;
keyEvent.SuppressKeyPress = true;
break;
case Keys.Delete:
if (ShiftKeyIsDown(keyEvent))
{
CopySelection();
DeleteSelection();
keyEvent.Handled = true;
keyEvent.SuppressKeyPress = true;
}
else
{
if (!Selecting &&
CharIndexToInsertBefore < internalTextWidget.Text.Length)
{
SelectionIndexToStartBefore = CharIndexToInsertBefore + 1;
Selecting = true;
}
DeleteSelection();
}
turnOffSelection = true;
keyEvent.Handled = true;
keyEvent.SuppressKeyPress = true;
break;
case Keys.Enter:
if (!Multiline)
{
// TODO: do the right thing.
keyEvent.Handled = true;
keyEvent.SuppressKeyPress = true;
if (EnterPressed != null)
{
EnterPressed(this, keyEvent);
}
if (TextHasChanged())
{
OnEditComplete(keyEvent);
}
}
break;
case Keys.Insert:
if (ShiftKeyIsDown(keyEvent))
{
turnOffSelection = true;
PasteFromClipboard();
keyEvent.Handled = true;
keyEvent.SuppressKeyPress = true;
}
if (keyEvent.Control)
{
turnOffSelection = false;
CopySelection();
keyEvent.Handled = true;
keyEvent.SuppressKeyPress = true;
}
break;
case Keys.A:
if (keyEvent.Control)
{
SelectAll();
keyEvent.Handled = true;
keyEvent.SuppressKeyPress = true;
}
break;
case Keys.X:
if (keyEvent.Control)
{
CopySelection();
DeleteSelection();
keyEvent.Handled = true;
keyEvent.SuppressKeyPress = true;
}
break;
case Keys.C:
if (keyEvent.Control)
{
turnOffSelection = false;
CopySelection();
keyEvent.Handled = true;
keyEvent.SuppressKeyPress = true;
}
break;
case Keys.V:
if (keyEvent.Control)
{
PasteFromClipboard();
keyEvent.Handled = true;
keyEvent.SuppressKeyPress = true;
}
break;
case Keys.Z:
if (keyEvent.Control)
{
Undo();
keyEvent.Handled = true;
keyEvent.SuppressKeyPress = true;
}
break;
case Keys.Y:
if (keyEvent.Control)
{
TextWidgetUndoData undoData = (TextWidgetUndoData)undoBuffer.GetNextRedoObject();
if (undoData != null)
{
undoData.ExtractData(this);
}
keyEvent.Handled = true;
keyEvent.SuppressKeyPress = true;
}
break;
}
base.OnKeyDown(keyEvent);
if (SetDesiredBarPosition)
{
FixBarPosition(DesiredXPositionOnLine.Set);
}
else
{
FixBarPosition(DesiredXPositionOnLine.Maintain);
}
// if we are not going to type a character, and therefore replace the selection, turn off the selection now if needed.
if (keyEvent.SuppressKeyPress && turnOffSelection)
{
Selecting = false;
}
Invalidate();
}