qtoolbarlayout.cpp

奇趣公司比较新的qt/emd版本

    if (expanded || animating || ranOutOfSpace) {
        Qt::ToolBarArea area = Qt::TopToolBarArea;
        if (QMainWindow *win = qobject_cast<QMainWindow*>(tb->parentWidget()))
            area = win->toolBarArea(tb);
        QSize hint = sizeHint();

        QPoint pos;
        rpick(o, pos) = pick(o, rect.bottomRight()) - margin - extensionExtent + 2;
        if (area == Qt::LeftToolBarArea || area == Qt::TopToolBarArea)
            rperp(o, pos) = perp(o, rect.topLeft()) + margin;
        else
            rperp(o, pos) = perp(o, rect.bottomRight()) - margin - (perp(o, hint) - 2*margin) + 1;
        QSize size;
        rpick(o, size) = extensionExtent;
        rperp(o, size) = perp(o, hint) - 2*margin;
        QRect r(pos, size);

        if (o == Qt::Horizontal)
            r = QStyle::visualRect(parentWidget()->layoutDirection(), rect, r);

        extension->setGeometry(r);

        if (extension->isHidden())
            extension->show();
    } else {
        if (!extension->isHidden())
            extension->hide();
    }
}

bool QToolBarLayout::layoutActions(const QSize &size)
{
    if (dirty)
        updateGeomArray();

    QRect rect(0, 0, size.width(), size.height());

    QList<QWidget*> showWidgets, hideWidgets;

    QToolBar *tb = qobject_cast<QToolBar*>(parentWidget());
    QStyle *style = tb->style();
    QStyleOptionToolBar opt;
    tb->initStyleOption(&opt);
    const int handleExtent = movable()
            ? style->pixelMetric(QStyle::PM_ToolBarHandleExtent, &opt, tb) : 0;
    const int margin = this->margin();
    const int spacing = this->spacing();
    const int extensionExtent = style->pixelMetric(QStyle::PM_ToolBarExtensionExtent, &opt, tb);
    Qt::Orientation o = tb->orientation();
    bool extensionMenuContainsOnlyWidgetActions = true;

    int space = pick(o, rect.size()) - 2*margin - handleExtent;
    if (space <= 0)
        return false;  // nothing to do.

    bool ranOutOfSpace = false;
    int rows = 0;
    int rowPos = perp(o, rect.topLeft()) + margin;
    int i = 0;
    while (i < items.count()) {
        QVector<QLayoutStruct> a = geomArray;

        int start = i;
        int size = 0;
        int prev = -1;
        int rowHeight = 0;
        int count = 0;
        bool expansiveRow = false;
        for (; i < items.count(); ++i) {
            if (a[i].empty)
                continue;

            int newSize = size + spacing + a[i].minimumSize;
            if (prev != -1 && newSize > space) {
                if (rows == 0)
                    ranOutOfSpace = true;
                // do we have to move the previous item to the next line to make space for
                // the extension button?
                if (count > 1 && size + spacing + extensionExtent > space)
                    i = prev;
                break;
            }

            if (expanded)
                rowHeight = qMax(rowHeight, perp(o, items.at(i)->sizeHint()));
            expansiveRow = expansiveRow || a[i].expansive;
            size = newSize;
            prev = i;
            ++count;
        }

        // stretch at the end
        a[i].sizeHint = 0;
        a[i].maximumSize = QWIDGETSIZE_MAX;
        a[i].minimumSize = 0;
        a[i].expansive = true;
        a[i].stretch = 0;
        a[i].empty = true;

        qGeomCalc(a, start, i - start + (expansiveRow ? 0 : 1), 0,
                    space - (ranOutOfSpace ? (extensionExtent + spacing) : 0),
                    spacing);

        for (int j = start; j < i; ++j) {
            QToolBarItem *item = items.at(j);

            if (a[j].empty) {
                if (!item->widget()->isHidden())
                    hideWidgets << item->widget();
                continue;
            }

            QPoint pos;
            rpick(o, pos) = margin + handleExtent + spacing + a[j].pos;
            rperp(o, pos) = rowPos;
            QSize size;
            rpick(o, size) = a[j].size;
            if (expanded)
                rperp(o, size) = rowHeight;
            else
                rperp(o, size) = perp(o, rect.size()) - 2*margin;
            QRect r(pos, size);

            if (o == Qt::Horizontal)
                r = QStyle::visualRect(parentWidget()->layoutDirection(), rect, r);

            item->setGeometry(r);

            if (item->widget()->isHidden())
                showWidgets << item->widget();
            if (popupMenu && !defaultWidgetAction(item->action))
                popupMenu->removeAction(item->action);
        }

        if (!expanded) {
            for (int j = i; j < items.count(); ++j) {
                QToolBarItem *item = items.at(j);
                if (!item->widget()->isHidden())
                    hideWidgets << item->widget();
                if (popupMenu) {
                    if (!defaultWidgetAction(item->action)) {
                        popupMenu->addAction(item->action);
                        extensionMenuContainsOnlyWidgetActions = false;
                    }
                }
            }
            break;
        }

        rowPos += rowHeight + spacing;
        ++rows;
    }

    // if we are using a popup menu, not the expadning toolbar effect, we cannot move custom
    // widgets into the menu. If only custom widget actions are chopped off, the popup menu
    // is empty. So we show the little extension button to show something is chopped off,
    // but we make it disabled.
    extension->setEnabled(popupMenu == 0 || !extensionMenuContainsOnlyWidgetActions);

    // we have to do the show/hide here, because it triggers more calls to setGeometry :(
    for (int i = 0; i < showWidgets.count(); ++i)
        showWidgets.at(i)->show();
    for (int i = 0; i < hideWidgets.count(); ++i)
        hideWidgets.at(i)->hide();

    return ranOutOfSpace;
}

QSize QToolBarLayout::expandedSize(const QSize &size) const
{
    if (dirty)
        updateGeomArray();

    QToolBar *tb = qobject_cast<QToolBar*>(parentWidget());
    QMainWindow *win = qobject_cast<QMainWindow*>(tb->parentWidget());
    Qt::Orientation o = tb->orientation();
    QStyle *style = tb->style();
    QStyleOptionToolBar opt;
    tb->initStyleOption(&opt);
    const int handleExtent = movable()
            ? style->pixelMetric(QStyle::PM_ToolBarHandleExtent, &opt, tb) : 0;
    const int margin = this->margin();
    const int spacing = this->spacing();
    const int extensionExtent = style->pixelMetric(QStyle::PM_ToolBarExtensionExtent, &opt, tb);

    int total_w = 0;
    int count = 0;
    for (int x = 0; x < items.count(); ++x) {
        if (!geomArray[x].empty) {
            ++count;
            total_w += spacing + geomArray[x].minimumSize;
        }
    }
    if (count == 0)
        return QSize(0, 0);

    int min_w = pick(o, size);
    int rows = (int)sqrt(count + 0.0);
    if (rows == 1)
        ++rows;      // we want to expand to at least two rows
    int space = total_w/rows + spacing + extensionExtent;
    space = qMax(space, min_w - 2*margin - handleExtent);
    if (win != 0)
        space = qMin(space, pick(o, win->size()) - 2*margin - handleExtent);

    int w = 0;
    int h = 0;
    int i = 0;
    while (i < items.count()) {
        int count = 0;
        int size = 0;
        int prev = -1;
        int rowHeight = 0;
        for (; i < items.count(); ++i) {
            if (geomArray[i].empty)
                continue;

            int newSize = size + spacing + geomArray[i].minimumSize;
            rowHeight = qMax(rowHeight, perp(o, items.at(i)->sizeHint()));
            if (prev != -1 && newSize > space) {
                if (count > 1 && size + spacing + extensionExtent > space) {
                    size -= spacing + geomArray[prev].minimumSize;
                    i = prev;
                }
                break;
            }

            size = newSize;
            prev = i;
            ++count;
        }

        w = qMax(size, w);
        h += rowHeight + spacing;
    }

    w += 2*margin + handleExtent + spacing + extensionExtent;
    w = qMax(w, min_w);
    if (win != 0)
        w = qMin(w, pick(o, win->size()));
    h += 2*margin;

    QSize result;
    rpick(o, result) = w;
    rperp(o, result) = h;
    return result;
}

void QToolBarLayout::setExpanded(bool exp)
{
    if (exp == expanded)
        return;

    expanded = exp;
    extension->setChecked(expanded);

    QToolBar *tb = qobject_cast<QToolBar*>(parentWidget());
    if (QMainWindow *win = qobject_cast<QMainWindow*>(tb->parentWidget())) {
        animating = true;
        QMainWindowLayout *layout = qobject_cast<QMainWindowLayout*>(win->layout());
        if (expanded) {
            tb->raise();
        } else {
            QList<int> path = layout->layoutState.indexOf(tb);
            if (!path.isEmpty()) {
                QRect rect = layout->layoutState.itemRect(path);
                layoutActions(rect.size());
            }
        }
        layout->layoutState.toolBarAreaLayout.apply(true);
    }
}

QSize QToolBarLayout::minimumSize() const
{
    if (dirty)
        updateGeomArray();
    return minSize;
}

QSize QToolBarLayout::sizeHint() const
{
    if (dirty)
        updateGeomArray();
    return hint;
}

QToolBarItem *QToolBarLayout::createItem(QAction *action)
{
    bool customWidget = false;
    bool standardButtonWidget = false;
    QWidget *widget = 0;
    QToolBar *tb = qobject_cast<QToolBar*>(parentWidget());

    if (QWidgetAction *widgetAction = qobject_cast<QWidgetAction *>(action)) {
        widget = widgetAction->requestWidget(tb);
        if (widget != 0)
            customWidget = true;
    } else if (action->isSeparator()) {
        QToolBarSeparator *sep = new QToolBarSeparator(tb);
        connect(tb, SIGNAL(orientationChanged(Qt::Orientation)),
                sep, SLOT(setOrientation(Qt::Orientation)));
        widget = sep;
    }

    if (!widget) {
        QToolButton *button = new QToolButton(tb);
        button->setAutoRaise(true);
        button->setFocusPolicy(Qt::NoFocus);
        button->setIconSize(tb->iconSize());
        button->setToolButtonStyle(tb->toolButtonStyle());
        QObject::connect(tb, SIGNAL(iconSizeChanged(QSize)),
                         button, SLOT(setIconSize(QSize)));
        QObject::connect(tb, SIGNAL(toolButtonStyleChanged(Qt::ToolButtonStyle)),
                         button, SLOT(setToolButtonStyle(Qt::ToolButtonStyle)));
        button->setDefaultAction(action);
        QObject::connect(button, SIGNAL(triggered(QAction*)), tb, SIGNAL(actionTriggered(QAction*)));
        widget = button;
        standardButtonWidget = true;
    }

    widget->hide();
    QToolBarItem *result = new QToolBarItem(widget);
    if (standardButtonWidget)
        result->setAlignment(Qt::AlignJustify);
    result->customWidget = customWidget;
    result->action = action;
    return result;
}

QRect QToolBarLayout::handleRect() const
{
    return handRect;
}

#endif // QT_NO_TOOLBAR