void OnKeyEnd(ref Position cur, ref Position next)
{
next.First = dataView.Buffer.Size;
next.Second = dataView.Buffer.Size;
next.Digit = 0;
okp_showType = DataViewDisplay.ShowType.End;
}
void OnKeyHome(ref Position cur, ref Position next)
{
next.First = 0;
next.Second = 0;
next.Digit = 0;
okp_showType = DataViewDisplay.ShowType.Start;
}
void OnKeyPageDown(ref Position cur, ref Position next)
{
long offset = cur.Second;
int digit = cur.Digit;
offset += okp_bpr * (int)dvDisplay.VScroll.Adjustment.PageIncrement;
if (offset > dataView.Buffer.Size)
{
offset = dataView.Buffer.Size;
//digit = 0;
}
okp_showType = DataViewDisplay.ShowType.Cursor;
next.First = offset;
next.Second = offset;
next.Digit = digit;
}
///<summary>Handle key presses</summary>
internal void OnKeyPress(object o, KeyPressEventArgs args)
{
Gdk.EventKey e = args.Event;
okp_focusArea = null;
bool shiftPressed = false;
// find focused area
okp_focusArea = dvDisplay.Layout.AreaGroup.FocusedArea;
// if no area has the focus, give it to the first one applicable
if (okp_focusArea == null)
{
dvDisplay.Layout.AreaGroup.CycleFocus();
okp_focusArea = dvDisplay.Layout.AreaGroup.FocusedArea;
}
// if still no area got the focus give up
if (okp_focusArea == null)
{
return;
}
okp_bpr = okp_focusArea.BytesPerRow;
okp_dpb = okp_focusArea.DigitsPerByte;
okp_showType = DataViewDisplay.ShowType.Closest;
if ((e.State & Gdk.ModifierType.ShiftMask) == Gdk.ModifierType.ShiftMask)
{
shiftPressed = true;
}
UpdateSelection(true);
Position cur = new Position();
if (shiftPressed || !dvDisplay.Layout.AreaGroup.Selection.IsEmpty())
{
cur = selEndPos;
cur.Digit = 0;
}
else
{
cur = selStartPos;
}
Position next = new Position();
// set next to cur in case it is not set by a keypress handler
next = cur;
// handle keys
bool specialKey = false;
switch (e.Key)
{
case Gdk.Key.Up:
OnKeyUp(ref cur, ref next);
break;
case Gdk.Key.Down:
OnKeyDown(ref cur, ref next);
break;
case Gdk.Key.Left:
OnKeyLeft(ref cur, ref next);
break;
case Gdk.Key.Right:
if (shiftPressed)
{
cur.Digit = okp_dpb - 1;
}
OnKeyRight(ref cur, ref next);
break;
case Gdk.Key.Page_Up:
OnKeyPageUp(ref cur, ref next);
break;
case Gdk.Key.Page_Down:
OnKeyPageDown(ref cur, ref next);
break;
case Gdk.Key.Home:
OnKeyHome(ref cur, ref next);
break;
case Gdk.Key.End:
OnKeyEnd(ref cur, ref next);
break;
case Gdk.Key.Insert:
OnKeyInsert();
break;
case Gdk.Key.Tab:
OnKeyTab();
// cycling through the areas may change the current cursor digit
// (note however that we don't want to call EvaluateSelection()->SetCursor()
// because that will reset the digit of all areas. So we just update
// selStartPos.Digit here and set specialKey = true to avoid calling SetCursor()...)
selStartPos.Digit = dvDisplay.Layout.AreaGroup.CursorDigit;
specialKey = true;
break;
case Gdk.Key.BackSpace:
OnKeyBackspace();
return; // OnKeyBackspace() handles drawing
default:
OnKeyDefault(e, ref cur, ref next, out specialKey);
break;
} // end switch()
//System.Console.WriteLine("Current: {0},{1},{2} Next: {3},{4},{5}", cur.First, cur.Second, cur.Digit, next.First, next.Second, next.Digit);
// if just a special key was pressed (eg shift, ctrl, tab or a digit the area doesn't understand don't do anything)
if (specialKey)
{
return;
}
if (shiftPressed)
{
next.Digit = 0;
if (selStartPos.First == selStartPos.Second)
{
selStartPos.First--;
}
selEndPos = next;
}
else
{
selEndPos = next;
selStartPos = next;
}
//System.Console.WriteLine("Start: {0},{1},{2} End: {3},{4},{5}", selStartPos.First, selStartPos.Second, selStartPos.Digit, selEndPos.First, selEndPos.Second, selEndPos.Digit);
EvaluateSelection(okp_showType);
}
///<summary>
/// Sets the selection and the cursor position according to the values of selStartPos, selEndPos
///</summary>
private void EvaluateSelection(DataViewDisplay.ShowType showType)
{
//System.Console.WriteLine("Evaluate (1) Start: {0},{1},{2} End: {3},{4},{5}", selStartPos.First, selStartPos.Second, selStartPos.Digit, selEndPos.First, selEndPos.Second, selEndPos.Digit);
long cursorOffset;
// no selection
if (selStartPos.First == selEndPos.First && selStartPos.Second == selEndPos.Second)
{
cursorOffset = selStartPos.Second;
// make sure cursor (or end of selection) is visible
dvDisplay.MakeOffsetVisible(cursorOffset, showType);
dataView.SetSelection(-1, -1);
dataView.MoveCursor(selStartPos.Second, selEndPos.Digit);
}
// selection with start pos <= end pos
else if (selStartPos.Second <= selEndPos.First)
{
// set end position between bytes
// this is done so that selections performed with
// the mouse can be continued with the keyboard
// (keyboard selections always set positions between bytes)
selEndPos.Second = selEndPos.First + 1;
// if selEndPos.Second is at or beyond the EOF
long off = ValidateOffset(selEndPos.Second);
if (selEndPos.First >= off)
{
off++;
}
cursorOffset = off;
dvDisplay.MakeOffsetVisible(cursorOffset, showType);
// set the selection only if the start position (which is the start of the selection)
// is within the file's limits
if (selStartPos.Second < dataView.Buffer.Size)
{
dataView.SetSelection(ValidateOffset(selStartPos.Second), ValidateOffset(selEndPos.First));
}
else
{
dataView.SetSelection(-1, -1);
}
dataView.MoveCursor(off, 0);
}
// selection with start pos > end pos
else
{
// set start position between bytes
// this is done so that selections performed with
// the mouse can be continued with the keyboard
// (keyboard selections always set positions between bytes)
// TODO: This is currently disabled because it breaks mouse
// selection
//
//selStartPos.Second = selStartPos.First + 1;
long off = selEndPos.Second;
cursorOffset = off;
dvDisplay.MakeOffsetVisible(cursorOffset, showType);
// set the selection only if the end position (which is the start of the selection)
// is within the file's limits
if (selEndPos.Second < dataView.Buffer.Size)
{
dataView.SetSelection(ValidateOffset(selEndPos.Second), ValidateOffset(selStartPos.First));
}
else
{
dataView.SetSelection(-1, -1);
}
dataView.MoveCursor(off, 0);
}
//System.Console.WriteLine("Evaluate (2) Start: {0},{1},{2} End: {3},{4},{5}", selStartPos.First, selStartPos.Second, selStartPos.Digit, selEndPos.First, selEndPos.Second, selEndPos.Digit);
}
