scrolledcheck.cpp

   1 /*
   2 Project: J-Ben
   3 Author:  Paul Goins
   4 Website: http://www.vultaire.net/software/jben/
   5 License: GNU General Public License (GPL) version 2
   6          (http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt)
   7
   8 File: scrolledcheck.cpp
   9
  10 This program is free software; you can redistribute it and/or modify
  11 it under the terms of the GNU General Public License as published by
  12 the Free Software Foundation; either version 2 of the License, or
  13 (at your option) any later version.
  14
  15 This program is distributed in the hope that it will be useful,
  16 but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 GNU General Public License for more details.
  19
  20 You should have received a copy of the GNU General Public License
  21 along with this program.  If not, see <http://www.gnu.org/licenses/>
  22 */
  23
  24 #include "scrolledcheck.h"
  25
  26 BEGIN_EVENT_TABLE(ScrolledCheck, wxCheckBox)
  27         EVT_SET_FOCUS(ScrolledCheck::OnSetFocus)
  28 END_EVENT_TABLE()
  29
  30 ScrolledCheck::ScrolledCheck(wxScrolledWindow *owner, int id, int localIndex, const wxString& label)
  31   : wxCheckBox(owner, id, label) {
  32         index = localIndex; /* This is our index of which checkbox this is within its parent wxScrolledWindow. */
  33 }
  34
  35 void ScrolledCheck::OnSetFocus(wxFocusEvent& event) {
  36         int viewX, viewY, sizeY, stepY, sizeInYSteps, newY;
  37         wxScrolledWindow *scrl = (wxScrolledWindow *)this->GetParent();
  38
  39         /* Get our current step index and the total number of y steps in our dialog */
  40         scrl->GetViewStart(&viewX, &viewY);
  41         scrl->GetClientSize(NULL, &sizeY);
  42         scrl->GetScrollPixelsPerUnit(NULL, &stepY);
  43         sizeInYSteps = sizeY / stepY;
  44
  45         /* Calculate whether we need to scroll the window, or whether we just leave it alone. */
  46         newY = viewY;
  47         if(index < viewY)
  48                 newY = index;
  49         else if(index > viewY + sizeInYSteps-1)
  50                 newY = index - (sizeInYSteps-1);
  51
  52         if(newY!=viewY) scrl->Scroll(viewX, newY);
  53 }