C++ QDockWidget::style方法代码示例

int QDockWidgetLayout::minimumTitleWidth() const
{
    QDockWidget *q = qobject_cast<QDockWidget*>(parentWidget());

    if (QWidget *title = widgetForRole(TitleBar))
        return pick(verticalTitleBar, title->minimumSizeHint());

    QSize closeSize(0, 0);
    QSize floatSize(0, 0);
    if (hasFeature(q, QDockWidget::DockWidgetClosable)) {
        if (QLayoutItem *item = item_list[CloseButton])
            closeSize = item->widget()->sizeHint();
    }
    if (hasFeature(q, QDockWidget::DockWidgetFloatable)) {
        if (QLayoutItem *item = item_list[FloatButton])
            floatSize = item->widget()->sizeHint();
    }

    int titleHeight = this->titleHeight();

    int mw = q->style()->pixelMetric(QStyle::PM_DockWidgetTitleMargin, 0, q);
    int fw = q->style()->pixelMetric(QStyle::PM_DockWidgetFrameWidth, 0, q);

    return pick(verticalTitleBar, closeSize)
            + pick(verticalTitleBar, floatSize)
            + titleHeight + 2*fw + 3*mw;
}

int QDockWidgetLayout::titleHeight() const
{
    QDockWidget *q = qobject_cast<QDockWidget*>(parentWidget());

    if (QWidget *title = widgetForRole(TitleBar))
        return perp(verticalTitleBar, title->sizeHint());

    QSize closeSize(0, 0);
    QSize floatSize(0, 0);
    if (QLayoutItem *item = item_list[CloseButton])
        closeSize = item->widget()->sizeHint();
    if (QLayoutItem *item = item_list[FloatButton])
        floatSize = item->widget()->sizeHint();

    int buttonHeight = qMax(perp(verticalTitleBar, closeSize),
                            perp(verticalTitleBar, floatSize));

    QFontMetrics titleFontMetrics = q->fontMetrics();
#ifdef Q_WS_MAC
    if (qobject_cast<QMacStyle *>(q->style())) {
        //### this breaks on proxy styles.  (But is this code still called?)
        QFont font = qt_app_fonts_hash()->value("QToolButton", q->font());
        titleFontMetrics = QFontMetrics(font);
    }
#endif

    int mw = q->style()->pixelMetric(QStyle::PM_DockWidgetTitleMargin, 0, q);

    return qMax(buttonHeight + 2, titleFontMetrics.height() + 2*mw);
}

void KoDockWidgetTitleBar::paintEvent(QPaintEvent*)
{
    QStylePainter p(this);

    QDockWidget *q = qobject_cast<QDockWidget*>(parentWidget());

    int fw = q->isFloating() ? q->style()->pixelMetric(QStyle::PM_DockWidgetFrameWidth, 0, q) : 0;
    int mw = q->style()->pixelMetric(QStyle::PM_DockWidgetTitleMargin, 0, q);

    QStyleOptionDockWidgetV2 titleOpt;
    titleOpt.initFrom(q);

    QSize collapseButtonSize(0,0);
    if (d->collapsable) {
        collapseButtonSize = d->collapseButton->size();
    }

    QSize lockButtonSize(0,0);
    if (d->lockable) {
        lockButtonSize = d->lockButton->size();
    }

    titleOpt.rect = QRect(QPoint(fw + mw + collapseButtonSize.width() + lockButtonSize.width(), 0),
                          QSize(geometry().width() - (fw * 2) -  mw - collapseButtonSize.width() - lockButtonSize.width(), geometry().height()));
    titleOpt.title = q->windowTitle();
    titleOpt.closable = hasFeature(q, QDockWidget::DockWidgetClosable);
    titleOpt.floatable = hasFeature(q, QDockWidget::DockWidgetFloatable);
    p.drawControl(QStyle::CE_DockWidgetTitle, titleOpt);
}

int QDockWidgetLayout::titleHeight() const
{
    QDockWidget *q = qobject_cast<QDockWidget*>(parentWidget());

    if (QWidget *title = widget(TitleBar))
        return perp(verticalTitleBar, title->sizeHint());

    QSize closeSize(0, 0);
    QSize floatSize(0, 0);
    if (QLayoutItem *item = item_list[CloseButton])
        closeSize = item->widget()->sizeHint();
    if (QLayoutItem *item = item_list[FloatButton])
        floatSize = item->widget()->sizeHint();

    int buttonHeight = qMax(perp(verticalTitleBar, closeSize),
                            perp(verticalTitleBar, floatSize));

    QFontMetrics titleFontMetrics = q->fontMetrics();
#ifdef Q_WS_MAC
    if (qobject_cast<QMacStyle *>(q->style())) {
        extern QHash<QByteArray, QFont> *qt_app_fonts_hash(); // qapplication.cpp
        QFont font = qt_app_fonts_hash()->value("QToolButton", q->font());
        titleFontMetrics = QFontMetrics(font);
    }
#endif

    int mw = q->style()->pixelMetric(QStyle::PM_DockWidgetTitleMargin, 0, q);

    return qMax(buttonHeight + 2, titleFontMetrics.lineSpacing() + 2*mw);
}

QSize KoDockWidgetTitleBar::sizeHint() const
{
    QDockWidget *q = qobject_cast<QDockWidget*>(parentWidget());

    int mw = q->style()->pixelMetric(QStyle::PM_DockWidgetTitleMargin, 0, q);
    int fw = q->style()->pixelMetric(QStyle::PM_DockWidgetFrameWidth, 0, q);

    // get size of buttons...
    QSize closeSize(0, 0);
    if (d->closeButton && d->closeButton->isVisible()) {
        closeSize = d->closeButton->sizeHint();
    }
    QSize floatSize(0, 0);
    if (d->floatButton && d->floatButton->isVisible()) {
        floatSize = d->floatButton->sizeHint();
    }
    QSize hideSize(0, 0);
    if (d->collapseButton && d->collapseButton->isVisible()) {
        hideSize = d->collapseButton->sizeHint();
    }

    int buttonHeight = qMax(qMax(closeSize.height(), floatSize.height()), hideSize.height()) + 2;
    int buttonWidth = closeSize.width() + floatSize.width() + hideSize.width();

    int height = buttonHeight;
    if (d->textVisibilityMode == FullTextAlwaysVisible) {
        // get font size
        QFontMetrics titleFontMetrics = q->fontMetrics();
        int fontHeight = titleFontMetrics.lineSpacing() + 2 * mw;

        height = qMax(height, fontHeight);
    }

    /*
     * Calculate the width of title and add to the total width of the docker window when collapsed.
     */
    const int titleWidth =
        (d->textVisibilityMode == FullTextAlwaysVisible) ? (q->fontMetrics().width(q->windowTitle()) + 2*mw) :
                                                           0;

    if (d->preCollapsedWidth > 0) {
        return QSize(d->preCollapsedWidth, height);
    }
    else {
        return QSize(buttonWidth /*+ height*/ + 2*mw + 2*fw + titleWidth, height);
    }
}

QSize QDockWidgetLayout::sizeFromContent(const QSize &content, bool floating) const
{
    QSize result = content;

    if (verticalTitleBar) {
        result.setHeight(qMax(result.height(), minimumTitleWidth()));
        result.setWidth(qMax(content.width(), 0));
    } else {
        result.setHeight(qMax(result.height(), 0));
        result.setWidth(qMax(content.width(), minimumTitleWidth()));
    }

    QDockWidget *w = qobject_cast<QDockWidget*>(parentWidget());
    bool customTitleBar = item_list[TitleBar] != 0;
    bool nativeDeco = floating && !customTitleBar;
#if defined(Q_WS_X11) || defined(Q_WS_QWS)
    nativeDeco = false;
#endif

    int fw = floating && !nativeDeco
            ? w->style()->pixelMetric(QStyle::PM_DockWidgetFrameWidth, 0, 0)
            : 0;

    const int th = titleHeight();
    if (!nativeDeco) {
        if (verticalTitleBar)
            result += QSize(th + 2*fw, 2*fw);
        else
            result += QSize(2*fw, th + 2*fw);
    }

    result.setHeight(qMin(result.height(), (int) QWIDGETSIZE_MAX));
    result.setWidth(qMin(result.width(), (int) QWIDGETSIZE_MAX));

    if (content.width() < 0)
        result.setWidth(-1);
    if (content.height() < 0)
        result.setHeight(-1);

    QSize min = w->minimumSize();

    /* A floating dockwidget will automatically get its minimumSize set to the layout's
       minimum size + deco. We're *not* interested in this, we only take minimumSize()
       into account if the user set it herself. Otherwise we end up expanding the result
       of a calculation for a non-floating dock widget to a floating dock widget's
       minimum size + window decorations. */

    uint explicitMin = 0;
    if (w->d_func()->extra != 0)
        explicitMin = w->d_func()->extra->explicitMinSize;

    if (!(explicitMin & Qt::Horizontal) || min.width() == 0)
        min.setWidth(-1);
    if (!(explicitMin & Qt::Vertical) || min.height() == 0)
        min.setHeight(-1);
    return result.boundedTo(w->maximumSize()).expandedTo(min);
}

int QDockWidgetLayout::titleHeight() const
{
    QDockWidget *q = qobject_cast<QDockWidget*>(parentWidget());

    if (QWidget *title = widgetForRole(TitleBar))
        return perp(verticalTitleBar, title->sizeHint());

    QSize closeSize(0, 0);
    QSize floatSize(0, 0);
    if (QLayoutItem *item = item_list[CloseButton])
        closeSize = item->widget()->sizeHint();
    if (QLayoutItem *item = item_list[FloatButton])
        floatSize = item->widget()->sizeHint();

    int buttonHeight = qMax(perp(verticalTitleBar, closeSize),
                            perp(verticalTitleBar, floatSize));

    QFontMetrics titleFontMetrics = q->fontMetrics();
    int mw = q->style()->pixelMetric(QStyle::PM_DockWidgetTitleMargin, 0, q);

    return qMax(buttonHeight + 2, titleFontMetrics.height() + 2*mw);
}

void QDockWidgetLayout::setGeometry(const QRect &geometry)
{
    QDockWidget *q = qobject_cast<QDockWidget*>(parentWidget());

    bool nativeDeco = nativeWindowDeco();

    int fw = q->isFloating() && !nativeDeco
            ? q->style()->pixelMetric(QStyle::PM_DockWidgetFrameWidth, 0, q)
            : 0;

    if (nativeDeco) {
        if (QLayoutItem *item = item_list[Content])
            item->setGeometry(geometry);
    } else {
        int titleHeight = this->titleHeight();

        if (verticalTitleBar) {
            _titleArea = QRect(QPoint(fw, fw),
                                QSize(titleHeight, geometry.height() - (fw * 2)));
        } else {
            _titleArea = QRect(QPoint(fw, fw),
                                QSize(geometry.width() - (fw * 2), titleHeight));
        }

        if (QLayoutItem *item = item_list[TitleBar]) {
            item->setGeometry(_titleArea);
        } else {
            QStyleOptionDockWidgetV2 opt;
            q->initStyleOption(&opt);

            if (QLayoutItem *item = item_list[CloseButton]) {
                if (!item->isEmpty()) {
                    QRect r = q->style()
                        ->subElementRect(QStyle::SE_DockWidgetCloseButton,
                                            &opt, q);
                    if (!r.isNull())
                        item->setGeometry(r);
                }
            }

            if (QLayoutItem *item = item_list[FloatButton]) {
                if (!item->isEmpty()) {
                    QRect r = q->style()
                        ->subElementRect(QStyle::SE_DockWidgetFloatButton,
                                            &opt, q);
                    if (!r.isNull())
                        item->setGeometry(r);
                }
            }
        }

        if (QLayoutItem *item = item_list[Content]) {
            QRect r = geometry;
            if (verticalTitleBar) {
                r.setLeft(_titleArea.right() + 1);
                r.adjust(0, fw, -fw, -fw);
            } else {
                r.setTop(_titleArea.bottom() + 1);
                r.adjust(fw, 0, -fw, -fw);
            }
            item->setGeometry(r);
        }
    }
}

QSize QDockWidgetLayout::sizeFromContent(const QSize &content, bool floating) const
{
    QSize result = content;

    if (verticalTitleBar) {
        result.setHeight(qMax(result.height(), minimumTitleWidth()));
        result.setWidth(qMax(content.width(), 0));
    } else {
        result.setHeight(qMax(result.height(), 0));
        result.setWidth(qMax(content.width(), minimumTitleWidth()));
    }

    QDockWidget *w = qobject_cast<QDockWidget*>(parentWidget());
    const bool nativeDeco = nativeWindowDeco(floating);

    int fw = floating && !nativeDeco
            ? w->style()->pixelMetric(QStyle::PM_DockWidgetFrameWidth, 0, w)
            : 0;

    const int th = titleHeight();
    if (!nativeDeco) {
        if (verticalTitleBar)
            result += QSize(th + 2*fw, 2*fw);
        else
            result += QSize(2*fw, th + 2*fw);
    }

    result.setHeight(qMin(result.height(), (int) QWIDGETSIZE_MAX));
    result.setWidth(qMin(result.width(), (int) QWIDGETSIZE_MAX));

    if (content.width() < 0)
        result.setWidth(-1);
    if (content.height() < 0)
        result.setHeight(-1);

    int left, top, right, bottom;
    w->getContentsMargins(&left, &top, &right, &bottom);
    //we need to substract the contents margin (it will be added by the caller)
    QSize min = w->minimumSize() - QSize(left + right, top + bottom);
    QSize max = w->maximumSize() - QSize(left + right, top + bottom);

    /* A floating dockwidget will automatically get its minimumSize set to the layout's
       minimum size + deco. We're *not* interested in this, we only take minimumSize()
       into account if the user set it herself. Otherwise we end up expanding the result
       of a calculation for a non-floating dock widget to a floating dock widget's
       minimum size + window decorations. */

    uint explicitMin = 0;
    uint explicitMax = 0;
    if (w->d_func()->extra != 0) {
        explicitMin = w->d_func()->extra->explicitMinSize;
        explicitMax = w->d_func()->extra->explicitMaxSize;
    }

    if (!(explicitMin & Qt::Horizontal) || min.width() == 0)
        min.setWidth(-1);
    if (!(explicitMin & Qt::Vertical) || min.height() == 0)
        min.setHeight(-1);

    if (!(explicitMax & Qt::Horizontal))
        max.setWidth(QWIDGETSIZE_MAX);
    if (!(explicitMax & Qt::Vertical))
        max.setHeight(QWIDGETSIZE_MAX);

    return result.boundedTo(max).expandedTo(min);
}