qdesigner_command.cpp

QT 开发环境里面一个很重要的文件

    if (m_mainWindow) {
        QDesignerContainerExtension *c;
        c = qt_extension<QDesignerContainerExtension*>(core()->extensionManager(), m_mainWindow);
        Q_ASSERT(c != 0);
        for (int i=0; i<c->count(); ++i) {
            if (c->widget(i) == m_menuBar) {
                c->remove(i);
                break;
            }
        }
    }

    core()->metaDataBase()->remove(m_menuBar);
    m_menuBar->hide();
    m_menuBar->setParent(formWindow());
    formWindow()->emitSelectionChanged();
}

void DeleteMenuBarCommand::undo()
{
    if (m_mainWindow) {
        m_menuBar->setParent(m_mainWindow);
        QDesignerContainerExtension *c;
        c = qt_extension<QDesignerContainerExtension*>(core()->extensionManager(), m_mainWindow);

        c->addWidget(m_menuBar);

        core()->metaDataBase()->add(m_menuBar);
        m_menuBar->show();
        formWindow()->emitSelectionChanged();
    }
}

// ---- CreateStatusBarCommand ----
CreateStatusBarCommand::CreateStatusBarCommand(QDesignerFormWindowInterface *formWindow)
    : QDesignerFormWindowCommand(QApplication::translate("Command", "Create Status Bar"), formWindow)
{
}

void CreateStatusBarCommand::init(QMainWindow *mainWindow)
{
    m_mainWindow = mainWindow;
    QDesignerFormEditorInterface *core = formWindow()->core();
    m_statusBar = qobject_cast<QStatusBar*>(core->widgetFactory()->createWidget("QStatusBar", m_mainWindow));
    core->widgetFactory()->initialize(m_statusBar);
}

void CreateStatusBarCommand::redo()
{
    QDesignerFormEditorInterface *core = formWindow()->core();
    QDesignerContainerExtension *c;
    c = qt_extension<QDesignerContainerExtension*>(core->extensionManager(), m_mainWindow);
    c->addWidget(m_statusBar);

    m_statusBar->setObjectName("statusBar");
    formWindow()->ensureUniqueObjectName(m_statusBar);
    core->metaDataBase()->add(m_statusBar);
    formWindow()->emitSelectionChanged();
}

void CreateStatusBarCommand::undo()
{
    QDesignerFormEditorInterface *core = formWindow()->core();
    QDesignerContainerExtension *c;
    c = qt_extension<QDesignerContainerExtension*>(core->extensionManager(), m_mainWindow);
    for (int i = 0; i < c->count(); ++i) {
        if (c->widget(i) == m_statusBar) {
            c->remove(i);
            break;
        }
    }

    core->metaDataBase()->remove(m_statusBar);
    formWindow()->emitSelectionChanged();
}

// ---- DeleteStatusBarCommand ----
DeleteStatusBarCommand::DeleteStatusBarCommand(QDesignerFormWindowInterface *formWindow)
    : QDesignerFormWindowCommand(QApplication::translate("Command", "Delete Status Bar"), formWindow)
{
}

void DeleteStatusBarCommand::init(QStatusBar *statusBar)
{
    m_statusBar = statusBar;
    m_mainWindow = qobject_cast<QMainWindow*>(statusBar->parentWidget());
}

void DeleteStatusBarCommand::redo()
{
    if (m_mainWindow) {
        QDesignerContainerExtension *c;
        c = qt_extension<QDesignerContainerExtension*>(core()->extensionManager(), m_mainWindow);
        Q_ASSERT(c != 0);
        for (int i=0; i<c->count(); ++i) {
            if (c->widget(i) == m_statusBar) {
                c->remove(i);
                break;
            }
        }
    }

    core()->metaDataBase()->remove(m_statusBar);
    m_statusBar->hide();
    m_statusBar->setParent(formWindow());
    formWindow()->emitSelectionChanged();
}

void DeleteStatusBarCommand::undo()
{
    if (m_mainWindow) {
        m_statusBar->setParent(m_mainWindow);
        QDesignerContainerExtension *c;
        c = qt_extension<QDesignerContainerExtension*>(core()->extensionManager(), m_mainWindow);

        c->addWidget(m_statusBar);

        core()->metaDataBase()->add(m_statusBar);
        m_statusBar->show();
        formWindow()->emitSelectionChanged();
    }
}

// ---- AddToolBarCommand ----
AddToolBarCommand::AddToolBarCommand(QDesignerFormWindowInterface *formWindow)
    : QDesignerFormWindowCommand(QApplication::translate("Command", "Add Tool Bar"), formWindow)
{
}

void AddToolBarCommand::init(QMainWindow *mainWindow)
{
    m_mainWindow = mainWindow;
    QDesignerFormEditorInterface *core = formWindow()->core();
    m_toolBar = qobject_cast<QToolBar*>(core->widgetFactory()->createWidget("QToolBar", m_mainWindow));
    m_toolBar->hide();
}

void AddToolBarCommand::redo()
{
    QDesignerFormEditorInterface *core = formWindow()->core();
    core->metaDataBase()->add(m_toolBar);

    QDesignerContainerExtension *c;
    c = qt_extension<QDesignerContainerExtension*>(core->extensionManager(), m_mainWindow);
    c->addWidget(m_toolBar);

    m_toolBar->setObjectName("toolBar");
    formWindow()->ensureUniqueObjectName(m_toolBar);
    formWindow()->emitSelectionChanged();
}

void AddToolBarCommand::undo()
{
    QDesignerFormEditorInterface *core = formWindow()->core();
    core->metaDataBase()->remove(m_toolBar);
    QDesignerContainerExtension *c;
    c = qt_extension<QDesignerContainerExtension*>(core->extensionManager(), m_mainWindow);
    for (int i = 0; i < c->count(); ++i) {
        if (c->widget(i) == m_toolBar) {
            c->remove(i);
            break;
        }
    }
    formWindow()->emitSelectionChanged();
}

// ---- DockWidgetCommand:: ----
DockWidgetCommand::DockWidgetCommand(const QString &description, QDesignerFormWindowInterface *formWindow)
    : QDesignerFormWindowCommand(description, formWindow)
{
}

DockWidgetCommand::~DockWidgetCommand()
{
}

void DockWidgetCommand::init(QDockWidget *dockWidget)
{
    m_dockWidget = dockWidget;
}

// ---- SetDockWidgetCommand ----
SetDockWidgetCommand::SetDockWidgetCommand(QDesignerFormWindowInterface *formWindow)
    : DockWidgetCommand(QApplication::translate("Command", "Set Dock Window Widget"), formWindow)
{
}

void SetDockWidgetCommand::init(QDockWidget *dockWidget, QWidget *widget)
{
    DockWidgetCommand::init(dockWidget);
    m_widget = widget;
    m_oldWidget = dockWidget->widget();
}

void SetDockWidgetCommand::undo()
{
    m_dockWidget->setWidget(m_oldWidget);
}

void SetDockWidgetCommand::redo()
{
    formWindow()->unmanageWidget(m_widget);
    formWindow()->core()->metaDataBase()->add(m_widget);
    m_dockWidget->setWidget(m_widget);
}

// ---- AddDockWidgetCommand ----
AddDockWidgetCommand::AddDockWidgetCommand(QDesignerFormWindowInterface *formWindow)
    : QDesignerFormWindowCommand(QApplication::translate("Command", "Add Dock Window"), formWindow)
{
}

void AddDockWidgetCommand::init(QMainWindow *mainWindow, QDockWidget *dockWidget)
{
    m_mainWindow = mainWindow;
    m_dockWidget = dockWidget;
}

void AddDockWidgetCommand::init(QMainWindow *mainWindow)
{
    m_mainWindow = mainWindow;
    QDesignerFormEditorInterface *core = formWindow()->core();
    m_dockWidget = qobject_cast<QDockWidget*>(core->widgetFactory()->createWidget("QDockWidget", m_mainWindow));
}

void AddDockWidgetCommand::redo()
{
    QDesignerFormEditorInterface *core = formWindow()->core();
    QDesignerContainerExtension *c;
    c = qt_extension<QDesignerContainerExtension*>(core->extensionManager(), m_mainWindow);
    c->addWidget(m_dockWidget);

    m_dockWidget->setObjectName("dockWidget");
    formWindow()->ensureUniqueObjectName(m_dockWidget);
    formWindow()->manageWidget(m_dockWidget);
    formWindow()->emitSelectionChanged();
}

void AddDockWidgetCommand::undo()
{
    QDesignerFormEditorInterface *core = formWindow()->core();
    QDesignerContainerExtension *c;
    c = qt_extension<QDesignerContainerExtension*>(core->extensionManager(), m_mainWindow);
    for (int i = 0; i < c->count(); ++i) {
        if (c->widget(i) == m_dockWidget) {
            c->remove(i);
            break;
        }
    }

    formWindow()->unmanageWidget(m_dockWidget);
    formWindow()->emitSelectionChanged();
}

// ---- AdjustWidgetSizeCommand ----
AdjustWidgetSizeCommand::AdjustWidgetSizeCommand(QDesignerFormWindowInterface *formWindow)
    : QDesignerFormWindowCommand(QString(), formWindow)
{
}

void AdjustWidgetSizeCommand::init(QWidget *widget)
{
    m_widget = widget;
    setText(QApplication::translate("Command", "Adjust Size of '%1'").arg(widget->objectName()));
    m_geometry = m_widget->geometry();
}

void AdjustWidgetSizeCommand::redo()
{
    QWidget *widget = m_widget;
    if (Utils::isCentralWidget(formWindow(), widget) && formWindow()->parentWidget())
        widget = formWindow()->parentWidget();

    m_geometry = widget->geometry();
    if (widget != m_widget && widget->parentWidget()) {
        QApplication::processEvents();
        widget->parentWidget()->adjustSize();
    }
    QApplication::processEvents();
    widget->adjustSize();

    if (QDesignerPropertyEditorInterface *propertyEditor = formWindow()->core()->propertyEditor()) {
        if (propertyEditor->object() == m_widget)
            propertyEditor->setPropertyValue(QLatin1String("geometry"), m_widget->geometry(), true);
    }
}

void AdjustWidgetSizeCommand::undo()
{
    if (formWindow()->mainContainer() == m_widget && formWindow()->parentWidget()) {
        formWindow()->parentWidget()->resize(m_geometry.width(), m_geometry.height());
        QWidget *widget = formWindow()->parentWidget();
        if (widget->parentWidget()) {
            widget->parentWidget()->setGeometry(m_geometry);
        }
    } else {
        m_widget->setGeometry(m_geometry);
    }

    if (QDesignerPropertyEditorInterface *propertyEditor = formWindow()->core()->propertyEditor()) {
        if (propertyEditor->object() == m_widget)
            propertyEditor->setPropertyValue(QLatin1String("geometry"), m_widget->geometry(), true);
    }
}

// ---- ChangeLayoutItemGeometry ----
ChangeLayoutItemGeometry::ChangeLayoutItemGeometry(QDesignerFormWindowInterface *formWindow)
    : QDesignerFormWindowCommand(QApplication::translate("Command", "Change Layout Item Geometry"), formWindow)
{
}

void ChangeLayoutItemGeometry::init(QWidget *widget, int row, int column, int rowspan, int colspan)
{
    m_widget = widget;
    Q_ASSERT(m_widget->parentWidget() != 0);

    QLayout *layout = LayoutInfo::managedLayout(formWindow()->core(), m_widget->parentWidget());
    Q_ASSERT(layout != 0);

    QGridLayout *grid = qobject_cast<QGridLayout*>(layout);
    Q_ASSERT(grid != 0);

    int itemIndex = grid->indexOf(m_widget);
    Q_ASSERT(itemIndex != -1);

    int current_row, current_column, current_rowspan, current_colspan;
    grid->getItemPosition(itemIndex, &current_row, &current_column, &current_rowspan, &current_colspan);

    m_oldInfo.setRect(current_column, current_row, current_colspan, current_rowspan);
    m_newInfo.setRect(column, row, colspan, rowspan);
}

void ChangeLayoutItemGeometry::changeItemPosition(const QRect &g)
{
    QLayout *layout = LayoutInfo::managedLayout(formWindow()->core(), m_widget->parentWidget());
    Q_ASSERT(layout != 0);

    QGridLayout *grid = qobject_cast<QGridLayout*>(layout);
    Q_ASSERT(grid != 0);

    int itemIndex = grid->indexOf(m_widget);
    Q_ASSERT(itemIndex != -1);

    QLayoutItem *item = grid->takeAt(itemIndex);
    delete item;

    add_to_grid_layout(grid, m_widget, g.top(), g.left(), g.height(), g.width());

    grid->invalidate();
    grid->activate();

    QLayoutSupport::createEmptyCells(grid);

    formWindow()->clearSelection(false);
    formWindow()->selectWidget(m_widget, true);
}

void ChangeLayoutItemGeometry::redo()
{
    changeItemPosition(m_newInfo);
}

void ChangeLayoutItemGeometry::undo()
{
    changeItemPosition(m_oldInfo);
}

// ---- InsertRowCommand ----
InsertRowCommand::InsertRowCommand(QDesignerFormWindowInterface *formWindow)
    : QDesignerFormWindowCommand(QApplication::translate("Command", "Insert Row"), formWindow)
{
}

void InsertRowCommand::init(QWidget *widget, int row)
{
    m_widget = widget;
    m_row = row;
}

void InsertRowCommand::redo()
{
}

void InsertRowCommand::undo()
{
}



// ---- ContainerWidgetCommand ----
ContainerWidgetCommand::ContainerWidgetCommand(QDesignerFormWindowInterface *formWindow)
    : QDesignerFormWindowCommand(QString(), formWindow)
{
}

ContainerWidgetCommand::~ContainerWidgetCommand()
{
}

QDesignerContainerExtension *ContainerWidgetCommand::containerExtension() const
{
    QExtensionManager *mgr = core()->extensionManager();
    return qt_extension<QDesignerContainerExtension*>(mgr, m_containerWidget);
}

void ContainerWidgetCommand::init(QWidget *containerWidget)
{
    m_containerWidget = containerWidget;

    if (QDesignerContainerExtension *c = containerExtension()) {
        m_index = c->currentIndex();
        m_widget = c->widget(m_index);
    }
}

void ContainerWidgetCommand::removePage()
{
    if (QDesignerContainerExtension *c = containerExtension()) {
        c->remove(m_index);

        m_widget->hide();
        m_widget->setParent(formWindow());
    }
}

void ContainerWidgetCommand::addPage()
{
    if (QDesignerContainerExtension *c = containerExtension()) {
        c->insertWidget(m_index, m_widget);

        m_widget->show();