C++ QUndoStack::beginMacro方法代码示例

void LayerModel::toggleOtherLayers(int layerIndex)
{
    if (mMap->layerCount() <= 1) // No other layers
        return;

    bool visibility = true;
    for (int i = 0; i < mMap->layerCount(); i++) {
        if (i == layerIndex)
            continue;

        Layer *layer = mMap->layerAt(i);
        if (layer->isVisible()) {
            visibility = false;
            break;
        }
    }

    QUndoStack *undoStack = mMapDocument->undoStack();
    if (visibility)
        undoStack->beginMacro(tr("Show Other Layers"));
    else
        undoStack->beginMacro(tr("Hide Other Layers"));

    for (int i = 0; i < mMap->layerCount(); i++) {
        if (i == layerIndex)
            continue;

        if (visibility != mMap->layerAt(i)->isVisible())
            undoStack->push(new SetLayerVisible(mMapDocument, i, visibility));
    }

    undoStack->endMacro();
}

void MapPropertiesDialog::accept()
{
    int format = mLayerDataCombo->currentIndex();
    if (format == -1) {
        // this shouldn't happen!
        format = 0;
    }

    Map::LayerDataFormat newLayerDataFormat = static_cast<Map::LayerDataFormat>(format - 1);

    QUndoStack *undoStack = mMapDocument->undoStack();

    QColor newColor = mColorButton->color();
    if (newColor == Qt::darkGray)
        newColor = QColor();

    const Map *map = mMapDocument->map();
    bool localChanges = newColor != map->backgroundColor() ||
            newLayerDataFormat != map->layerDataFormat();

    if (localChanges) {
        undoStack->beginMacro(QCoreApplication::translate(
            "Undo Commands",
            "Change Map Properties"));

        undoStack->push(new ChangeMapProperties(mMapDocument,
                                                newColor,
                                                newLayerDataFormat));
    }

    PropertiesDialog::accept();

    if (localChanges)
        undoStack->endMacro();
}

void PropertiesDock::pasteProperties()
{
    auto clipboardManager = ClipboardManager::instance();

    Properties pastedProperties = clipboardManager->properties();
    if (pastedProperties.isEmpty())
        return;

    const QList<Object *> objects = mDocument->currentObjects();
    if (objects.isEmpty())
        return;

    QList<QUndoCommand*> commands;

    for (Object *object : objects) {
        Properties properties = object->properties();
        properties.merge(pastedProperties);

        if (object->properties() != properties) {
            commands.append(new ChangeProperties(mDocument, QString(), object,
                                                 properties));
        }
    }

    if (!commands.isEmpty()) {
        QUndoStack *undoStack = mDocument->undoStack();
        undoStack->beginMacro(tr("Paste Property/Properties", nullptr,
                                 pastedProperties.size()));

        for (QUndoCommand *command : commands)
            undoStack->push(command);

        undoStack->endMacro();
    }
}

void ButtonTaskMenu::addToGroup(QAction *a)
{
    QButtonGroup *bg = qvariant_cast<QButtonGroup *>(a->data());
    Q_ASSERT(bg);

    QDesignerFormWindowInterface *fw = formWindow();
    const ButtonList bl = buttonList(fw->cursor());
    // Do we need to remove the buttons from an existing group?
    QUndoCommand *removeCmd = 0;
    if (bl.front()->group()) {
        removeCmd = createRemoveButtonsCommand(fw, bl);
        if (!removeCmd)
            return;
    }
    AddButtonsToGroupCommand *addCmd = new AddButtonsToGroupCommand(fw);
    addCmd->init(bl, bg);

    QUndoStack *history = fw->commandHistory();
    if (removeCmd) {
        history->beginMacro(addCmd->text());
        history->push(removeCmd);
        history->push(addCmd);
        history->endMacro();
    } else {
        history->push(addCmd);
    }
}

void AddShape::performAction(Block* block) const
{
	Node* node = static_cast<Node*>(block);

	GenerateShape dialog(_generator, PantinEngine::MainWindow());

	if(dialog.createShape())
	{
		K_ASSERT( node->instance()->fastInherits<Model>() ); // The instance HAS to be a model in Nigel. Only models can contain geometry.

		Model* model = static_cast<Model*>(node->instance());

		QUndoStack* undoStack = PantinEngine::InstanceUndoStack( model );
		undoStack->setActive(true);

		undoStack->beginMacro(
				tr("Adding new %1 to node %2")
				.arg(_generator->shape()->blockName(), node->blockName())
			);

		AddBlock* addGeometry = new AddBlock(model->geometries(), dialog.geometry());
		undoStack->push(addGeometry);

		AddBlock* addReference = new AddBlock(node, dialog.geometryInstance());
		undoStack->push(addReference);

		undoStack->endMacro();
	}
}

void PropertiesDock::removeProperties()
{
    Object *object = mDocument->currentObject();
    if (!object)
        return;

    const QList<QtBrowserItem*> items = mPropertyBrowser->selectedItems();
    if (items.isEmpty() || !mPropertyBrowser->allCustomPropertyItems(items))
        return;

    QStringList propertyNames;
    for (QtBrowserItem *item : items)
        propertyNames.append(item->property()->propertyName());

    QUndoStack *undoStack = mDocument->undoStack();
    undoStack->beginMacro(tr("Remove Property/Properties", nullptr,
                             propertyNames.size()));

    for (const QString &name : propertyNames) {
        undoStack->push(new RemoveProperty(mDocument,
                                           mDocument->currentObjects(),
                                           name));
    }

    undoStack->endMacro();
}

void MapDocumentActionHandler::delete_()
{
    if (!mMapDocument)
        return;

    Layer *currentLayer = mMapDocument->currentLayer();
    if (!currentLayer)
        return;

    TileLayer *tileLayer = dynamic_cast<TileLayer*>(currentLayer);
    const QRegion &selectedArea = mMapDocument->selectedArea();
    const QList<MapObject*> &selectedObjects = mMapDocument->selectedObjects();

    QUndoStack *undoStack = mMapDocument->undoStack();
    undoStack->beginMacro(tr("Delete"));

    if (tileLayer && !selectedArea.isEmpty()) {
        undoStack->push(new EraseTiles(mMapDocument, tileLayer, selectedArea));
    } else if (!selectedObjects.isEmpty()) {
        foreach (MapObject *mapObject, selectedObjects)
            undoStack->push(new RemoveMapObject(mMapDocument, mapObject));
    }

    selectNone();
    undoStack->endMacro();
}

void EditPolygonTool::splitSegments()
{
    if (mSelectedHandles.size() < 2)
        return;

    const PointIndexesByObject p = groupIndexesByObject(mSelectedHandles);
    QMapIterator<MapObject*, RangeSet<int> > i(p);

    QUndoStack *undoStack = mapDocument()->undoStack();
    bool macroStarted = false;

    while (i.hasNext()) {
        MapObject *object = i.next().key();
        const RangeSet<int> &indexRanges = i.value();

        const bool closed = object->shape() == MapObject::Polygon;
        QPolygonF oldPolygon = object->polygon();
        QPolygonF newPolygon = splitPolygonSegments(oldPolygon, indexRanges,
                                                    closed);

        if (newPolygon.size() > oldPolygon.size()) {
            if (!macroStarted) {
                undoStack->beginMacro(tr("Split Segments"));
                macroStarted = true;
            }

            undoStack->push(new ChangePolygon(mapDocument(), object,
                                              newPolygon,
                                              oldPolygon));
        }
    }

    if (macroStarted)
        undoStack->endMacro();
}

void ButtonTaskMenu::createGroup()
{
    QDesignerFormWindowInterface *fw = formWindow();
    const ButtonList bl = buttonList(fw->cursor());
    // Do we need to remove the buttons from an existing group?
    QUndoCommand *removeCmd = 0;
    if (bl.front()->group()) {
        removeCmd = createRemoveButtonsCommand(fw, bl);
        if (!removeCmd)
            return;
    }
    // Add cmd
    CreateButtonGroupCommand *addCmd = new CreateButtonGroupCommand(fw);
    if (!addCmd->init(bl)) {
        qWarning("** WARNING Failed to initialize CreateButtonGroupCommand!");
        delete addCmd;
        return;
    }
    // Need a macro [even if we only have the add command] since the command might trigger additional commands
    QUndoStack *history = fw->commandHistory();
    history->beginMacro(addCmd->text());
    if (removeCmd)
        history->push(removeCmd);
    history->push(addCmd);
    history->endMacro();
}

void ImageLayerPropertiesDialog::accept()
{
    QUndoStack *undoStack = mMapDocument->undoStack();

    const QColor newColor = mColorButton->color() != Qt::gray
        ? mColorButton->color()
        : QColor();

    const QString newPath = mImage->text();
    const bool localChanges = newColor != mImageLayer->transparentColor() ||
            newPath != mImageLayer->imageSource();

    if (localChanges) {
        undoStack->beginMacro(QCoreApplication::translate(
            "Undo Commands",
            "Change Image Layer Properties"));

        undoStack->push(new ChangeImageLayerProperties(
                            mMapDocument,
                            mImageLayer,
                            newColor,
                            newPath));
    }

    PropertiesDialog::accept();

    if (localChanges)
        undoStack->endMacro();
}

bool BookmarksModel::dropMimeData(const QMimeData *data,
                                  Qt::DropAction action, int row, int column, const QModelIndex &parent)
{
    if (action == Qt::IgnoreAction)
        return true;

    if (column > 0)
        return false;

    BookmarkNode *parentNode = node(parent);

    if (!data->hasFormat(MIMETYPE)) {
        if (!data->hasUrls())
            return false;

        BookmarkNode *node = new BookmarkNode(BookmarkNode::Bookmark, parentNode);
        node->url = QString::fromUtf8(data->urls().at(0).toEncoded());

        if (data->hasText())
            node->title = data->text();
        else
            node->title = node->url;

        m_bookmarksManager->addBookmark(parentNode, node, row);
        return true;
    }

    QByteArray ba = data->data(MIMETYPE);
    QDataStream stream(&ba, QIODevice::ReadOnly);
    if (stream.atEnd())
        return false;

    QUndoStack *undoStack = m_bookmarksManager->undoRedoStack();
    undoStack->beginMacro(QLatin1String("Move Bookmarks"));

    while (!stream.atEnd()) {
        QByteArray encodedData;
        stream >> encodedData;
        QBuffer buffer(&encodedData);
        buffer.open(QBuffer::ReadOnly);

        XbelReader reader;
        BookmarkNode *rootNode = reader.read(&buffer);
        QList<BookmarkNode*> children = rootNode->children();
        for (int i = 0; i < children.count(); ++i) {
            BookmarkNode *bookmarkNode = children.at(i);
            rootNode->remove(bookmarkNode);
            row = qMax(0, row);
            m_bookmarksManager->addBookmark(parentNode, bookmarkNode, row);
            m_endMacro = true;
        }
        delete rootNode;
    }
    return true;
}

/**
 * Convenience method that deals with some of the logic related to pasting
 * a group of objects.
 */
void ClipboardManager::pasteObjectGroup(const ObjectGroup *objectGroup,
                                        MapDocument *mapDocument,
                                        const MapView *view,
                                        PasteFlags flags)
{
    Layer *currentLayer = mapDocument->currentLayer();
    if (!currentLayer)
        return;

    ObjectGroup *currentObjectGroup = currentLayer->asObjectGroup();
    if (!currentObjectGroup)
        return;

    QPointF insertPos;

    if (!(flags & PasteInPlace)) {
        // Determine where to insert the objects
        const MapRenderer *renderer = mapDocument->renderer();
        const QPointF center = objectGroup->objectsBoundingRect().center();

        // Take the mouse position if the mouse is on the view, otherwise
        // take the center of the view.
        QPoint viewPos;
        if (view->underMouse())
            viewPos = view->mapFromGlobal(QCursor::pos());
        else
            viewPos = QPoint(view->width() / 2, view->height() / 2);

        const QPointF scenePos = view->mapToScene(viewPos);

        insertPos = renderer->screenToPixelCoords(scenePos) - center;
        SnapHelper(renderer).snap(insertPos);
    }

    QUndoStack *undoStack = mapDocument->undoStack();
    QList<MapObject*> pastedObjects;
    pastedObjects.reserve(objectGroup->objectCount());

    undoStack->beginMacro(tr("Paste Objects"));
    for (const MapObject *mapObject : objectGroup->objects()) {
        if (flags & PasteNoTileObjects && !mapObject->cell().isEmpty())
            continue;

        MapObject *objectClone = mapObject->clone();
        objectClone->resetId();
        objectClone->setPosition(objectClone->position() + insertPos);
        pastedObjects.append(objectClone);
        undoStack->push(new AddMapObject(mapDocument,
                                         currentObjectGroup,
                                         objectClone));
    }
    undoStack->endMacro();

    mapDocument->setSelectedObjects(pastedObjects);
}

void TilesetDock::removeTiles()
{
    TilesetView *view = currentTilesetView();
    if (!view)
        return;
    if (!view->selectionModel()->hasSelection())
        return;

    const QModelIndexList indexes = view->selectionModel()->selectedIndexes();
    const TilesetModel *model = view->tilesetModel();
    QList<Tile*> tiles;

    for (const QModelIndex &index : indexes)
        if (Tile *tile = model->tileAt(index))
            tiles.append(tile);

    auto matchesAnyTile = [&tiles] (const Cell &cell) {
        if (Tile *tile = cell.tile)
            return tiles.contains(tile);
        return false;
    };
    const bool inUse = hasTileReferences(mMapDocument, matchesAnyTile);

    // If the tileset is in use, warn the user and confirm removal
    if (inUse) {
        QMessageBox warning(QMessageBox::Warning,
                            tr("Remove Tiles"),
                            tr("One or more of the tiles to be removed are "
                               "still in use by the map!"),
                            QMessageBox::Yes | QMessageBox::No,
                            this);
        warning.setDefaultButton(QMessageBox::Yes);
        warning.setInformativeText(tr("Remove all references to these tiles?"));

        if (warning.exec() != QMessageBox::Yes)
            return;
    }

    QUndoStack *undoStack = mMapDocument->undoStack();
    undoStack->beginMacro(tr("Remove Tiles"));

    if (inUse)
        removeTileReferences(mMapDocument, matchesAnyTile);

    Tileset *tileset = view->tilesetModel()->tileset();
    undoStack->push(new RemoveTiles(mMapDocument, tileset, tiles));

    undoStack->endMacro();

    // Clear the current tiles, will be referencing the removed tiles
    setCurrentTiles(nullptr);
    setCurrentTile(nullptr);
}

void RaiseLowerHelper::push(const QList<QUndoCommand*> &commands,
                            const QString &text)
{
    if (commands.isEmpty())
        return;

    QUndoStack *undoStack = mMapDocument->undoStack();
    undoStack->beginMacro(text);
    foreach (QUndoCommand *command, commands)
        undoStack->push(command);
    undoStack->endMacro();
}

void ButtonGroupMenu::breakGroup()
{
    BreakButtonGroupCommand *cmd = new BreakButtonGroupCommand(m_formWindow);
    if (cmd->init(m_buttonGroup)) {
        // Need a macro since the command might trigger additional commands
        QUndoStack *history = m_formWindow->commandHistory();
        history->beginMacro(cmd->text());
        history->push(cmd);
        history->endMacro();
    } else {
        qWarning("** WARNING Failed to initialize BreakButtonGroupCommand!");
        delete cmd;
    }
}