mirror of
https://github.com/crystalidea/qt6windows7.git
synced 2024-11-23 12:07:03 +08:00
128 lines
3.0 KiB
C++
128 lines
3.0 KiB
C++
// Copyright (C) 2016 The Qt Company Ltd.
|
|
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
|
|
|
|
#include "commands.h"
|
|
#include "diagramitem.h"
|
|
|
|
#include <QGraphicsScene>
|
|
|
|
//! [0]
|
|
MoveCommand::MoveCommand(DiagramItem *diagramItem, const QPointF &oldPos,
|
|
QUndoCommand *parent)
|
|
: QUndoCommand(parent), myDiagramItem(diagramItem)
|
|
, myOldPos(oldPos), newPos(diagramItem->pos())
|
|
{
|
|
}
|
|
//! [0]
|
|
|
|
//! [1]
|
|
bool MoveCommand::mergeWith(const QUndoCommand *command)
|
|
{
|
|
const MoveCommand *moveCommand = static_cast<const MoveCommand *>(command);
|
|
DiagramItem *item = moveCommand->myDiagramItem;
|
|
|
|
if (myDiagramItem != item)
|
|
return false;
|
|
|
|
newPos = item->pos();
|
|
setText(QObject::tr("Move %1")
|
|
.arg(createCommandString(myDiagramItem, newPos)));
|
|
|
|
return true;
|
|
}
|
|
//! [1]
|
|
|
|
//! [2]
|
|
void MoveCommand::undo()
|
|
{
|
|
myDiagramItem->setPos(myOldPos);
|
|
myDiagramItem->scene()->update();
|
|
setText(QObject::tr("Move %1")
|
|
.arg(createCommandString(myDiagramItem, newPos)));
|
|
}
|
|
//! [2]
|
|
|
|
//! [3]
|
|
void MoveCommand::redo()
|
|
{
|
|
myDiagramItem->setPos(newPos);
|
|
setText(QObject::tr("Move %1")
|
|
.arg(createCommandString(myDiagramItem, newPos)));
|
|
}
|
|
//! [3]
|
|
|
|
//! [4]
|
|
DeleteCommand::DeleteCommand(QGraphicsScene *scene, QUndoCommand *parent)
|
|
: QUndoCommand(parent), myGraphicsScene(scene)
|
|
{
|
|
QList<QGraphicsItem *> list = myGraphicsScene->selectedItems();
|
|
list.first()->setSelected(false);
|
|
myDiagramItem = static_cast<DiagramItem *>(list.first());
|
|
setText(QObject::tr("Delete %1")
|
|
.arg(createCommandString(myDiagramItem, myDiagramItem->pos())));
|
|
}
|
|
//! [4]
|
|
|
|
//! [5]
|
|
void DeleteCommand::undo()
|
|
{
|
|
myGraphicsScene->addItem(myDiagramItem);
|
|
myGraphicsScene->update();
|
|
}
|
|
//! [5]
|
|
|
|
//! [6]
|
|
void DeleteCommand::redo()
|
|
{
|
|
myGraphicsScene->removeItem(myDiagramItem);
|
|
}
|
|
//! [6]
|
|
|
|
//! [7]
|
|
AddCommand::AddCommand(DiagramItem::DiagramType addType,
|
|
QGraphicsScene *scene, QUndoCommand *parent)
|
|
: QUndoCommand(parent), myGraphicsScene(scene)
|
|
{
|
|
static int itemCount = 0;
|
|
|
|
myDiagramItem = new DiagramItem(addType);
|
|
initialPosition = QPointF((itemCount * 15) % int(scene->width()),
|
|
(itemCount * 15) % int(scene->height()));
|
|
scene->update();
|
|
++itemCount;
|
|
setText(QObject::tr("Add %1")
|
|
.arg(createCommandString(myDiagramItem, initialPosition)));
|
|
}
|
|
//! [7]
|
|
|
|
AddCommand::~AddCommand()
|
|
{
|
|
if (!myDiagramItem->scene())
|
|
delete myDiagramItem;
|
|
}
|
|
|
|
//! [8]
|
|
void AddCommand::undo()
|
|
{
|
|
myGraphicsScene->removeItem(myDiagramItem);
|
|
myGraphicsScene->update();
|
|
}
|
|
//! [8]
|
|
|
|
//! [9]
|
|
void AddCommand::redo()
|
|
{
|
|
myGraphicsScene->addItem(myDiagramItem);
|
|
myDiagramItem->setPos(initialPosition);
|
|
myGraphicsScene->clearSelection();
|
|
myGraphicsScene->update();
|
|
}
|
|
//! [9]
|
|
|
|
QString createCommandString(DiagramItem *item, const QPointF &pos)
|
|
{
|
|
return QObject::tr("%1 at (%2, %3)")
|
|
.arg(item->diagramType() == DiagramItem::Box ? "Box" : "Triangle")
|
|
.arg(pos.x()).arg(pos.y());
|
|
}
|