- !GTK_SHEET_IN_SELECTION(sheet) && !GTK_SHEET_IN_DRAG(sheet)) {
- if(sheet->state==GTK_STATE_NORMAL) {
- row=sheet->active_cell.row;
- column=sheet->active_cell.col;
- if(!gtk_sheet_deactivate_cell(sheet)) return FALSE;
- sheet->active_cell.row=row;
- sheet->active_cell.col=column;
- sheet->drag_range=sheet->range;
- sheet->state=GTK_SHEET_RANGE_SELECTED;
- gtk_sheet_select_range(sheet, &sheet->drag_range);
- }
- sheet->x_drag=x;
- sheet->y_drag=y;
- if(row < sheet->range.row0) row++;
- if(row > sheet->range.rowi) row--;
- if(column < sheet->range.col0) column++;
- if(column > sheet->range.coli) column--;
- sheet->drag_cell.row=row;
- sheet->drag_cell.col=column;
- sheet->drag_range=sheet->range;
- draw_xor_rectangle(sheet, sheet->drag_range);
- GTK_SHEET_SET_FLAGS(sheet, GTK_SHEET_IN_DRAG);
- }
- else
- {
- gtk_sheet_click_cell(sheet, row, column, &veto);
- if(veto) GTK_SHEET_SET_FLAGS(sheet, GTK_SHEET_IN_SELECTION);
- }
-
+ !GTK_SHEET_IN_SELECTION(sheet)
+ && ! GTK_SHEET_IN_DRAG(sheet)
+ && ! gtk_sheet_locked(sheet)
+ && sheet->active_cell.row >= 0
+ && sheet->active_cell.col >= 0
+ )
+ {
+ if(sheet->state==GTK_STATE_NORMAL) {
+ row=sheet->active_cell.row;
+ column=sheet->active_cell.col;
+ if(!gtk_sheet_deactivate_cell(sheet)) return FALSE;
+ sheet->active_cell.row=row;
+ sheet->active_cell.col=column;
+ sheet->drag_range=sheet->range;
+ sheet->state=GTK_SHEET_RANGE_SELECTED;
+ gtk_sheet_select_range(sheet, &sheet->drag_range);
+ }
+ sheet->x_drag=x;
+ sheet->y_drag=y;
+ if(row < sheet->range.row0) row++;
+ if(row > sheet->range.rowi) row--;
+ if(column < sheet->range.col0) column++;
+ if(column > sheet->range.coli) column--;
+ sheet->drag_cell.row=row;
+ sheet->drag_cell.col=column;
+ sheet->drag_range=sheet->range;
+ draw_xor_rectangle(sheet, sheet->drag_range);
+ GTK_SHEET_SET_FLAGS(sheet, GTK_SHEET_IN_DRAG);
+ }
+ else
+ {
+ gtk_sheet_click_cell(sheet, row, column, &veto);
+ if(veto) GTK_SHEET_SET_FLAGS(sheet, GTK_SHEET_IN_SELECTION);
+ }