Mercurial > hg > orthanc-stone

annotate Framework/Scene2DViewport/UndoStack.h @ 879:12b591d5d63c am-dev

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some Qt integration (wip)
author Alain Mazy <alain@mazy.be>
date Fri, 05 Jul 2019 14:52:43 +0200
parents e3c56d4f863f
children ac88989817e3
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1 /**
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2 * Stone of Orthanc
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
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5 * Copyright (C) 2017-2019 Osimis S.A., Belgium
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6 *
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7 * This program is free software: you can redistribute it and/or
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8 * modify it under the terms of the GNU Affero General Public License
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9 * as published by the Free Software Foundation, either version 3 of
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10 * the License, or (at your option) any later version.
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11 *
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12 * This program is distributed in the hope that it will be useful, but
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 * Affero General Public License for more details.
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16 *
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17 * You should have received a copy of the GNU Affero General Public License
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18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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19 **/
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20
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21 #pragma once
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22
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23 #include <boost/shared_ptr.hpp>
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24
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25 #include <vector>
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26
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27 namespace OrthancStone
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28 {
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29 class TrackerCommand;
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30
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31 class UndoStack
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32 {
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33 public:
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34 UndoStack();
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35
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36 /**
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37 Stores a command :
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38 - this first trims the undo stack to keep the first numAppliedCommands_
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39 - then it adds the supplied command at the top of the undo stack
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40
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41 In other words, when a new command is pushed, all the undone (and not
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42 redone) commands are removed.
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43 */
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44 void PushCommand(boost::shared_ptr<TrackerCommand> command);
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45
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46 /**
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47 Undoes the command at the top of the undo stack, or throws if there is no
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48 command to undo.
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49 You can check "CanUndo" first to protect against extraneous redo.
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50 */
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51 void Undo();
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52
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53 /**
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54 Redoes the command that is just above the last applied command in the undo
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55 stack or throws if there is no command to redo.
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56 You can check "CanRedo" first to protect against extraneous redo.
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57 */
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58 void Redo();
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59
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60 /** selfexpl */
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61 bool CanUndo() const;
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62
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63 /** selfexpl */
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64 bool CanRedo() const;
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65
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66 private:
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67 std::vector<boost::shared_ptr<TrackerCommand> > commandStack_;
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68
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69 /**
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70 This is always between >= 0 and <= undoStack_.size() and gives the
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71 position where the controller is in the undo stack.
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72 - If numAppliedCommands_ > 0, one can undo
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73 - If numAppliedCommands_ < numAppliedCommands_.size(), one can redo
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74 */
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75 size_t numAppliedCommands_;
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76 };
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77 }