новые иконки в OpenBoard
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
OpenBoard/src/domain/UBGraphicsItemZLevelUndoCom...

96 lines
3.2 KiB

11 years ago
/*
* Copyright (C) 2013 Open Education Foundation
*
* Copyright (C) 2010-2013 Groupement d'Intérêt Public pour
* l'Education Numérique en Afrique (GIP ENA)
*
* This file is part of OpenBoard.
*
* OpenBoard is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 3 of the License,
* with a specific linking exception for the OpenSSL project's
* "OpenSSL" library (or with modified versions of it that use the
* same license as the "OpenSSL" library).
*
* OpenBoard is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with OpenBoard. If not, see <http://www.gnu.org/licenses/>.
*/
#include "UBGraphicsItemZLevelUndoCommand.h"
UBGraphicsItemZLevelUndoCommand::UBGraphicsItemZLevelUndoCommand(UBGraphicsScene *_scene, const QList<QGraphicsItem*>& _items, qreal _previousZLevel, UBZLayerController::moveDestination dest):UBUndoCommand(){
Q_ASSERT(_scene != NULL);
mpScene = _scene;
mItems = _items;
mPreviousZLevel = _previousZLevel;
mDest = dest;
mHack = false;
}
UBGraphicsItemZLevelUndoCommand::UBGraphicsItemZLevelUndoCommand(UBGraphicsScene *_scene, QGraphicsItem* _item, qreal _previousZLevel, UBZLayerController::moveDestination dest):UBUndoCommand(){
Q_ASSERT(_scene != NULL);
mpScene = _scene;
if(NULL != _item)
mItems.append(_item);
mPreviousZLevel = _previousZLevel;
mDest = dest;
mHack = false;
}
UBGraphicsItemZLevelUndoCommand::~UBGraphicsItemZLevelUndoCommand(){
}
void UBGraphicsItemZLevelUndoCommand::undo(){
if(!mpScene || mItems.empty())
return;
// Getting the difference between the initial z-value and the actual one
qreal zDiff = qAbs(mItems.at(mItems.size()-1)->data(UBGraphicsItemData::ItemOwnZValue).toReal() - mPreviousZLevel);
if(mDest == UBZLayerController::down || mDest == UBZLayerController::bottom){
// Move up
QList<QGraphicsItem*>::iterator downIt = mItems.end();
for(; downIt >= mItems.begin(); downIt--){
for(int i=0; i<zDiff; i++)
mpScene->changeZLevelTo(*downIt, UBZLayerController::up);
}
}else if(mDest == UBZLayerController::up || mDest == UBZLayerController::top){
// Move down
foreach(QGraphicsItem* item, mItems){
for(int i=0; i<zDiff; i++)
mpScene->changeZLevelTo(item, UBZLayerController::down);
}
}
}
void UBGraphicsItemZLevelUndoCommand::redo(){
if(!mHack){
// Ugly! But pushing a new command to QUndoStack calls redo by itself.
mHack = true;
}else{
if(!mpScene)
return;
foreach(QGraphicsItem* item, mItems){
mpScene->changeZLevelTo(item, mDest);
updateLazyScene();
}
}
}
void UBGraphicsItemZLevelUndoCommand::updateLazyScene(){
mpScene->update(mpScene->sceneRect());
mpScene->updateSelectionFrame();
}