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VK_PRIOR:
begin
ClearSelection;
MoveBy(-VisibleColCount);
end;
VK_INSERT:
if CanModify and (not ReadOnly) and (dgEditing in Options) then
begin
ClearSelection;
Insert;
end;
VK_TAB: if not (ssAlt in Shift) then Tab(not (ssShift in Shift));
VK_ESCAPE:
begin
FDatalink.Reset;
ClearSelection;
if not (dgAlwaysShowEditor in Options) then HideEditor;
end;
VK_F2: EditorMode := True;
end
else
if ssCtrl in Shift then
begin
if (Key in RowMovementKeys) then ClearSelection;
case Key of
VK_UP, VK_PRIOR: MoveBy(-FDatalink.ActiveRecord);
VK_DOWN, VK_NEXT: MoveBy(FDatalink.BufferCount - FDatalink.ActiveRecord - 1);
VK_LEFT: MoveCol(FIndicatorOffset);
VK_RIGHT: MoveCol(ColCount - 1);
VK_HOME: First;
VK_END: Last;
VK_DELETE:
if (not ReadOnly) and not IsEmpty
and CanModify and DeletePrompt then
if FBookmarks.Count > 0 then
FBookmarks.Delete
else
Delete;
end
end
else
case Key of
VK_UP: PriorRow(True);
VK_DOWN: NextRow(True);
VK_LEFT:
if dgRowSelect in Options then
PriorRow(False) else
MoveCol(Col - 1);
VK_RIGHT:
if dgRowSelect in Options then
NextRow(False) else
MoveCol(Col + 1);
VK_HOME:
if (ColCount = FIndicatorOffset+1)
or (dgRowSelect in Options) then
begin
ClearSelection;
First;
end
else
MoveCol(FIndicatorOffset);
VK_END:
if (ColCount = FIndicatorOffset+1)
or (dgRowSelect in Options) then
begin
ClearSelection;
Last;
end
else
MoveCol(ColCount - 1);
VK_NEXT:
begin
ClearSelection;
MoveBy(VisibleRowCount);
end;
VK_PRIOR:
begin
ClearSelection;
MoveBy(-VisibleRowCount);
end;
VK_INSERT:
if CanModify and (not ReadOnly) and (dgEditing in Options) then
begin
ClearSelection;
Insert;
end;
VK_TAB: if not (ssAlt in Shift) then Tab(not (ssShift in Shift));
VK_ESCAPE:
begin
FDatalink.Reset;
ClearSelection;
if not (dgAlwaysShowEditor in Options) then HideEditor;
end;
VK_F2: EditorMode := True;
end;
end;
procedure TCustomVDBGrid.KeyPress(var Key: Char);
begin
if not (dgAlwaysShowEditor in Options) and (Key = #13) then
FDatalink.UpdateData;
inherited KeyPress(Key);
end;
{ InternalLayout is called with layout locks and column locks in effect }
procedure TCustomVDBGrid.InternalLayout;
var
I, J, K: Integer;
Fld: TField;
Column: TColumn;
SeenPassthrough: Boolean;
RestoreCanvas: Boolean;
function FieldIsMapped(F: TField): Boolean;
var
X: Integer;
begin
Result := False;
if F = nil then Exit;
for X := 0 to FDatalink.FieldCount-1 do
if FDatalink.Fields[X] = F then
begin
Result := True;
Exit;
end;
end;
begin
if (csLoading in ComponentState) then Exit;
if HandleAllocated then KillMessage(Handle, cm_DeferLayout);
{ Check for Columns.State flip-flop }
SeenPassthrough := False;
for I := 0 to FColumns.Count-1 do
begin
if (FColumns[I] is TPassthroughColumn) then
SeenPassthrough := True
else
if SeenPassthrough then
begin { We have both custom and passthrough columns. Kill the latter }
for J := FColumns.Count-1 downto 0 do
begin
Column := FColumns[J];
if Column is TPassthroughColumn then
Column.Free;
end;
Break;
end;
end;
FIndicatorOffset := 0;
if dgIndicator in Options then
Inc(FIndicatorOffset);
FDatalink.ClearMapping;
if FDatalink.Active then DefineFieldMap;
if FColumns.State = csDefault then
begin
{ Destroy columns whose fields have been destroyed or are no longer
in field map }
if (not FDataLink.Active) and (FDatalink.DefaultFields) then
FColumns.Clear
else
for J := FColumns.Count-1 downto 0 do
with FColumns[J] do
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