ModelView::CommandService Class Reference

Provides undo/redo for all commands of SessionModel. More...

Collaboration diagram for ModelView::CommandService:

Public Member Functions
	CommandService (SessionModel *model)
SessionItem *	copyItem (const SessionItem *item, SessionItem *parent, const TagRow &tagrow)
SessionItem *	insertNewItem (const item_factory_func_t &func, SessionItem *parent, const TagRow &tagrow)
void	moveItem (SessionItem *item, SessionItem *new_parent, const TagRow &tagrow)
void	removeItem (SessionItem *parent, const TagRow &tagrow)
void	setCommandRecordPause (bool value)
bool	setData (SessionItem *item, const Variant &value, int role)
void	setUndoRedoEnabled (bool value)
UndoStackInterface *	undoStack () const

Private Member Functions
template<typename C , typename... Args>
CommandResult	process_command (Args &&... args)
	Creates and processes command of given type using given argument list. More...
bool	provideUndo () const

Private Attributes
std::unique_ptr< UndoStackInterface >	m_commands
SessionModel *	m_model
bool	m_pause_record

Detailed Description

Provides undo/redo for all commands of SessionModel.

Definition at line 35 of file commandservice.h.

Constructor & Destructor Documentation

CommandService()

CommandService::CommandService

(

SessionModel *

model

)

Definition at line 27 of file commandservice.cpp.

: m_model(model), m_pause_record(false) {}

Member Function Documentation

copyItem()

SessionItem * CommandService::copyItem	(	const SessionItem *	item,
		SessionItem *	parent,
		const TagRow &	tagrow
	)

Definition at line 49 of file commandservice.cpp.

{
    if (!item)
        return nullptr;
 
    if (parent->model() != m_model)
        throw std::runtime_error(
            "CommandService::copyItem() -> Item doesn't belong to given model");
 
    int actual_row = tagrow.row < 0 ? parent->itemCount(tagrow.tag) : tagrow.row;
 
    return std::get<SessionItem*>(
        process_command<CopyItemCommand>(item, parent, TagRow{tagrow.tag, actual_row}));
}

References ModelView::SessionItem::itemCount(), m_model, ModelView::SessionItem::model(), ModelView::TagRow::row, and ModelView::TagRow::tag.

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insertNewItem()

SessionItem * CommandService::insertNewItem	(	const item_factory_func_t &	func,
		SessionItem *	parent,
		const TagRow &	tagrow
	)

Definition at line 37 of file commandservice.cpp.

{
    if (!parent)
        parent = m_model->rootItem();
 
    int actual_row = tagrow.row < 0 ? parent->itemCount(tagrow.tag) : tagrow.row;
 
    return std::get<SessionItem*>(
        process_command<InsertNewItemCommand>(func, parent, TagRow{tagrow.tag, actual_row}));
}

References ModelView::SessionItem::itemCount(), m_model, ModelView::SessionModel::rootItem(), ModelView::TagRow::row, and ModelView::TagRow::tag.

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moveItem()

void CommandService::moveItem	(	SessionItem *	item,
		SessionItem *	new_parent,
		const TagRow &	tagrow
	)

Definition at line 82 of file commandservice.cpp.

{
    if (item->model() != m_model)
        throw std::runtime_error(
            "CommandService::removeRow() -> Item doesn't belong to given model");
 
    if (new_parent->model() != m_model)
        throw std::runtime_error(
            "CommandService::removeRow() -> Parent doesn't belong to given model");
 
    int actual_row = tagrow.row < 0 ? new_parent->itemCount(tagrow.tag) : tagrow.row;
 
    process_command<MoveItemCommand>(item, new_parent, TagRow{tagrow.tag, actual_row});
}

References ModelView::SessionItem::itemCount(), m_model, ModelView::SessionItem::model(), ModelView::TagRow::row, and ModelView::TagRow::tag.

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process_command()

template<typename C , typename... Args>

CommandResult ModelView::CommandService::process_command ( Args &&...  args )

private

Creates and processes command of given type using given argument list.

Definition at line 69 of file commandservice.h.

{
    if (provideUndo()) {
        // making shared because underlying QUndoStack requires ownership
        auto command = std::make_shared<C>(std::forward<Args>(args)...);
        m_commands->execute(command);
        return command->result();
    } else {
        C command(std::forward<Args>(args)...);
        command.execute();
        return command.result();
    }
}

References m_commands, and provideUndo().

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provideUndo()

bool CommandService::provideUndo ( ) const

private

Definition at line 107 of file commandservice.cpp.

{
    return m_commands && !m_pause_record;
}

References m_commands, and m_pause_record.

Referenced by process_command().

removeItem()

void CommandService::removeItem	(	SessionItem *	parent,
		const TagRow &	tagrow
	)

Definition at line 73 of file commandservice.cpp.

{
    if (parent->model() != m_model)
        throw std::runtime_error(
            "CommandService::removeRow() -> Item doesn't belong to given model");
 
    process_command<RemoveItemCommand>(parent, tagrow);
}

References m_model, and ModelView::SessionItem::model().

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setCommandRecordPause()

void CommandService::setCommandRecordPause

(

bool

value

)

Definition at line 102 of file commandservice.cpp.

{
    m_pause_record = value;
}

References m_pause_record.

setData()

bool CommandService::setData	(	SessionItem *	item,
		const Variant &	value,
		int	role
	)

Definition at line 65 of file commandservice.cpp.

{
    if (!item)
        return false;
 
    return std::get<bool>(process_command<SetValueCommand>(item, value, role));
}

setUndoRedoEnabled()

void CommandService::setUndoRedoEnabled

(

bool

value

)

Definition at line 29 of file commandservice.cpp.

{
    if (value)
        m_commands = std::make_unique<UndoStack>();
    else
        m_commands.reset();
}

References m_commands.

undoStack()

UndoStackInterface * CommandService::undoStack

(

)

const

Definition at line 97 of file commandservice.cpp.

{
    return m_commands.get();
}

References m_commands.

Member Data Documentation

m_commands

std::unique_ptr<UndoStackInterface> ModelView::CommandService::m_commands

private

Definition at line 62 of file commandservice.h.

Referenced by process_command(), provideUndo(), setUndoRedoEnabled(), and undoStack().

m_model

SessionModel* ModelView::CommandService::m_model

private

Definition at line 61 of file commandservice.h.

Referenced by copyItem(), insertNewItem(), moveItem(), and removeItem().

m_pause_record

bool ModelView::CommandService::m_pause_record

private

Definition at line 63 of file commandservice.h.

Referenced by provideUndo(), and setCommandRecordPause().

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The documentation for this class was generated from the following files:

• /home/www/ba/mvvm/model/mvvm/commands/commandservice.h
• /home/www/ba/mvvm/model/mvvm/commands/commandservice.cpp