layout.cpp

奇趣公司比较新的qt/emd版本

        const bool showIt = w->isVisibleTo(m_formWindow);
        QWidget *container = widgetFactory->containerOfWidget(m_parentWidget);

        // ### remove widget here
        QWidget *parentWidget = w->parentWidget();
        QDesignerFormEditorInterface *core = m_formWindow->core();
        QDesignerLayoutDecorationExtension *deco = qt_extension<QDesignerLayoutDecorationExtension*>(core->extensionManager(), parentWidget);

        if (deco)
            deco->removeWidget(w);

        w->setParent(container);
        w->setGeometry(rc);

        if (showIt)
            w->show();
    }

    LayoutInfo::deleteLayout(m_formWindow->core(), m_layoutBase);

    if (m_parentWidget != m_layoutBase && !qobject_cast<QMainWindow*>(m_layoutBase)) {
        m_formWindow->unmanageWidget(m_layoutBase);
        m_layoutBase->hide();
    } else {
        QMainWindow *mw = qobject_cast<QMainWindow*>(m_formWindow->mainContainer());
        if (m_layoutBase != m_formWindow->mainContainer() &&
                    (!mw || mw->centralWidget() != m_layoutBase))
            m_layoutBase->setGeometry(m_oldGeometry);
    }

    QWidget *ww = m_widgets.size() ? m_widgets.front() : m_formWindow;
    m_formWindow->selectWidget(ww);
}

void Layout::breakLayout()
{
    QMap<QWidget *, QRect> rects;
    foreach (QWidget *w, m_widgets) {
        rects.insert(w, w->geometry());
    }

    const QPoint m_layoutBasePos = m_layoutBase->pos();
    QDesignerWidgetDataBaseInterface *widgetDataBase = m_formWindow->core()->widgetDataBase();

    LayoutInfo::deleteLayout(m_formWindow->core(), m_layoutBase);

    const bool needReparent = qobject_cast<QLayoutWidget*>(m_layoutBase) ||
                        qobject_cast<QSplitter*>(m_layoutBase)     ||
                        (!widgetDataBase->isContainer(m_layoutBase, false) &&
                          m_layoutBase != m_formWindow->mainContainer());
    const bool needResize = qobject_cast<QSplitter*>(m_layoutBase);
    const bool add = m_geometries.isEmpty();

    QMapIterator<QWidget*, QRect> it(rects);
    while (it.hasNext()) {
        it.next();

        QWidget *w = it.key();
        if (needReparent) {
            w->setParent(m_layoutBase->parentWidget(), 0);
            w->move(m_layoutBasePos + it.value().topLeft());
            w->show();
        }

        if (needResize)
            w->resize(it.value().size());

        if (add)
            m_geometries.insert(w, QRect(w->pos(), w->size()));
    }

    if (needReparent) {
        m_layoutBase->hide();
        m_parentWidget = m_layoutBase->parentWidget();
        m_formWindow->unmanageWidget(m_layoutBase);
    } else {
        m_parentWidget = m_layoutBase;
    }

    if (!m_widgets.isEmpty() && m_widgets.first() && m_widgets.first()->isVisibleTo(m_formWindow))
        m_formWindow->selectWidget(m_widgets.first());
    else
        m_formWindow->selectWidget(m_formWindow);
}
 
    
QLayout *Layout::createLayout(int type)
{
    if (m_useSplitter)
        return WidgetFactory::createUnmanagedLayout(m_layoutBase, type);

    QLayout *layout = m_formWindow->core()->widgetFactory()->createLayout(m_layoutBase, 0, type);
    if (qobject_cast<QLayoutWidget*>(m_layoutBase)) {
        QDesignerPropertySheetExtension *sheet = qt_extension<QDesignerPropertySheetExtension*>(m_formWindow->core()->extensionManager(), layout);
        if (sheet) {
            sheet->setProperty(sheet->indexOf(QLatin1String("leftMargin")), 0);
            sheet->setProperty(sheet->indexOf(QLatin1String("topMargin")), 0);
            sheet->setProperty(sheet->indexOf(QLatin1String("rightMargin")), 0);
            sheet->setProperty(sheet->indexOf(QLatin1String("bottomMargin")), 0);
        }
    }
    return layout;
}

HorizontalLayout::HorizontalLayout(const QList<QWidget*> &wl, QWidget *p, QDesignerFormWindowInterface *fw, QWidget *lb, bool splitter)
    : Layout(wl, p, fw, lb, splitter)
{
}

void HorizontalLayout::sort()
{
    HorizontalLayoutList l(m_widgets);
    l.sort();
    m_widgets = l;
}

void HorizontalLayout::doLayout()
{
    bool needMove, needReparent;
    if (!prepareLayout(needMove, needReparent))
        return;

    QHBoxLayout *layout = static_cast<QHBoxLayout *>(createLayout(LayoutInfo::HBox));

    foreach (QWidget *w, m_widgets) {
        if (needReparent && w->parent() != m_layoutBase) {
            w->setParent(m_layoutBase, 0);
            w->move(QPoint(0,0));
        }

        if (m_useSplitter) {
            QSplitter *splitter = qobject_cast<QSplitter*>(m_layoutBase);
            Q_ASSERT(splitter != 0);
            splitter->addWidget(w);
        } else {
            if (Spacer *spacer = qobject_cast<Spacer*>(w))
                layout->addWidget(w, 0, spacer->alignment());
            else
                add_to_box_layout(layout, w);
        }
        w->show();
    }

    if (QSplitter *splitter = qobject_cast<QSplitter*>(m_layoutBase))
        splitter->setOrientation(Qt::Horizontal);

    finishLayout(needMove, layout);
}

VerticalLayout::VerticalLayout(const QList<QWidget*> &wl, QWidget *p, QDesignerFormWindowInterface *fw, QWidget *lb, bool splitter)
    : Layout(wl, p, fw, lb, splitter)
{
}

void VerticalLayout::sort()
{
    VerticalLayoutList l(m_widgets);
    l.sort();
    m_widgets = l;
}

void VerticalLayout::doLayout()
{
    bool needMove, needReparent;
    if (!prepareLayout(needMove, needReparent))
        return;

    QVBoxLayout *layout = static_cast<QVBoxLayout *>(createLayout(LayoutInfo::VBox));
    Q_ASSERT(layout != 0);

    foreach (QWidget *w, m_widgets) {
        if (needReparent && w->parent() != m_layoutBase) {
            w->setParent(m_layoutBase, 0);
            w->move(QPoint(0,0));
        }

        if (m_useSplitter) {
            QSplitter *splitter = qobject_cast<QSplitter*>(m_layoutBase);
            Q_ASSERT(splitter != 0);
            splitter->addWidget(w);
        } else {
            if (Spacer *spacer = qobject_cast<Spacer*>(w))
                layout->addWidget(w, 0, spacer->alignment());
            else
                add_to_box_layout(layout, w);
        }
        w->show();
    }

    if (QSplitter *splitter = qobject_cast<QSplitter*>(m_layoutBase)) { // ### m_useSplitter??
        splitter->setOrientation(Qt::Vertical);
    }

    finishLayout(needMove, layout);
}

class Grid
{
public:
    Grid(int rows, int cols);
    ~Grid();

    QWidget* cell(int row, int col) const { return m_cells[ row * m_ncols + col]; }
    void setCell(int row, int col, QWidget* w) { m_cells[ row * m_ncols + col] = w; }
    void setCells(QRect c, QWidget* w) {
        for (int rows = c.bottom()-c.top(); rows >= 0; rows--)
            for (int cols = c.right()-c.left(); cols >= 0; cols--) {
                setCell(c.top()+rows, c.left()+cols, w);
            }
    }
    int numRows() const { return m_nrows; }
    int numCols() const { return m_ncols; }

    void simplify();
    bool locateWidget(QWidget* w, int& row, int& col, int& rowspan, int& colspan);

private:
    void merge();
    int countRow(int r, int c) const;
    int countCol(int r, int c) const;
    void setRow(int r, int c, QWidget* w, int count);
    void setCol(int r, int c, QWidget* w, int count);
    bool isWidgetStartCol(int c) const;
    bool isWidgetEndCol(int c) const;
    bool isWidgetStartRow(int r) const;
    bool isWidgetEndRow(int r) const;
    bool isWidgetTopLeft(int r, int c) const;
    void extendLeft();
    void extendRight();
    void extendUp();
    void extendDown();
    
    const int m_nrows;
    const int m_ncols;
    
    QWidget** m_cells;
    bool* m_cols;
    bool* m_rows;
};

Grid::Grid(int r, int c) :
    m_nrows(r), 
    m_ncols(c),
    m_cells(new QWidget*[ r * c ]),
    m_cols(new bool[ c ]),
    m_rows(new bool[ r ])
{
    qFill(m_cells, m_cells + r * c,  static_cast<QWidget *>(0));
}

Grid::~Grid()
{
    delete [] m_cells;
    delete [] m_cols;
    delete [] m_rows;
}

int Grid::countRow(int r, int c) const
{
    QWidget* w = cell(r, c);
    int i = c + 1;
    while (i < m_ncols && cell(r, i) == w)
        i++;
    return i - c;
}

int Grid::countCol(int r, int c) const
{
    QWidget* w = cell(r, c);
    int i = r + 1;
    while (i < m_nrows && cell(i, c) == w)
        i++;
    return i - r;
}

void Grid::setCol(int r, int c, QWidget* w, int count)
{
    for (int i = 0; i < count; i++)
        setCell(r + i, c, w);
}

void Grid::setRow(int r, int c, QWidget* w, int count)
{
    for (int i = 0; i < count; i++)
        setCell(r, c + i, w);
}

bool Grid::isWidgetStartCol(int c) const
{
    int r;
    for (r = 0; r < m_nrows; r++) {
        if (cell(r, c) && ((c==0) || (cell(r, c)  != cell(r, c-1)))) {
            return true;
        }
    }
    return false;
}

bool Grid::isWidgetEndCol(int c) const
{
    int r;
    for (r = 0; r < m_nrows; r++) {
        if (cell(r, c) && ((c == m_ncols-1) || (cell(r, c) != cell(r, c+1))))
            return true;
    }
    return false;
}

bool Grid::isWidgetStartRow(int r) const
{
    int c;
    for (c = 0; c < m_ncols; c++) {
        if (cell(r, c) && ((r==0) || (cell(r, c) != cell(r-1, c))))
            return true;
    }
    return false;
}

bool Grid::isWidgetEndRow(int r) const
{
    int c;
    for (c = 0; c < m_ncols; c++) {
        if (cell(r, c) && ((r == m_nrows-1) || (cell(r, c) != cell(r+1, c))))
            return true;
    }
    return false;
}


bool Grid::isWidgetTopLeft(int r, int c) const
{
    QWidget* w = cell(r, c);
    if (!w)
        return false;
    return (!r || cell(r-1, c) != w) && (!c || cell(r, c-1) != w);
}

void Grid::extendLeft()
{
    int r,c,i;
    for (c = 1; c < m_ncols; c++) {
        for (r = 0; r < m_nrows; r++) {
            QWidget* w = cell(r, c);
            if (!w)
                continue;

            int cc = countCol(r, c);
            int stretch = 0;
            for (i = c-1; i >= 0; i--) {
                if (cell(r, i))
                    break;
                if (countCol(r, i) < cc)
                    break;
                if (isWidgetEndCol(i))
                    break;
                if (isWidgetStartCol(i)) {