qtoolbarlayout.cpp

奇趣公司比较新的qt/emd版本

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#include <qaction.h>
#include <qwidgetaction.h>
#include <qtoolbar.h>
#include <qstyleoption.h>
#include <qtoolbutton.h>
#include <qmenu.h>
#include <qdebug.h>
#include <math.h>

#include "qmainwindowlayout_p.h"
#include "qtoolbarextension_p.h"
#include "qtoolbarlayout_p.h"
#include "qtoolbarseparator_p.h"

#ifndef QT_NO_TOOLBAR

/******************************************************************************
** QToolBarItem
*/

QToolBarItem::QToolBarItem(QWidget *widget)
    : QWidgetItem(widget), action(0), customWidget(false)
{
}

bool QToolBarItem::isEmpty() const
{
    return action == 0 || !action->isVisible();
}

/******************************************************************************
** QToolBarLayout
*/

QToolBarLayout::QToolBarLayout(QWidget *parent)
    : QLayout(parent), expanded(false), animating(false), dirty(true),
        expanding(false), empty(true), popupMenu(0)
{
    QToolBar *tb = qobject_cast<QToolBar*>(parent);

    extension = new QToolBarExtension(tb);
    extension->setFocusPolicy(Qt::NoFocus);
    extension->hide();
    QObject::connect(tb, SIGNAL(orientationChanged(Qt::Orientation)),
                     extension, SLOT(setOrientation(Qt::Orientation)));

    setUsePopupMenu(qobject_cast<QMainWindow*>(tb->parentWidget()) == 0);
}

QToolBarLayout::~QToolBarLayout()
{
    for (int i = 0; i < items.count(); ++i) {
        while (!items.isEmpty()) {
            QToolBarItem *item = items.takeFirst();
            if (QWidgetAction *widgetAction = qobject_cast<QWidgetAction*>(item->action)) {
                if (item->customWidget)
                    widgetAction->releaseWidget(item->widget());
            }
            delete item;
        }
    }
}

void QToolBarLayout::updateMarginAndSpacing()
{
    QToolBar *tb = qobject_cast<QToolBar*>(parentWidget());
    QStyle *style = tb->style();
    QStyleOptionToolBar opt;
    tb->initStyleOption(&opt);
    setMargin(style->pixelMetric(QStyle::PM_ToolBarItemMargin, &opt, tb)
                + style->pixelMetric(QStyle::PM_ToolBarFrameWidth, &opt, tb));
    setSpacing(style->pixelMetric(QStyle::PM_ToolBarItemSpacing, &opt, tb));
}

void QToolBarLayout::setUsePopupMenu(bool set)
{
    if (!set) {
        QObject::connect(extension, SIGNAL(clicked(bool)),
                        this, SLOT(setExpanded(bool)));
        extension->setPopupMode(QToolButton::DelayedPopup);
        extension->setMenu(0);
        delete popupMenu;
        popupMenu = 0;
    } else {
        QObject::disconnect(extension, SIGNAL(clicked(bool)),
                            this, SLOT(setExpanded(bool)));
        extension->setPopupMode(QToolButton::InstantPopup);
        if (!popupMenu) {
            popupMenu = new QMenu(extension);
        }
        extension->setMenu(popupMenu);
    }

    invalidate();
}

void QToolBarLayout::addItem(QLayoutItem*)
{
    qWarning() << "QToolBarLayout::addItem(): please use addAction() instead";
    return;
}

QLayoutItem *QToolBarLayout::itemAt(int index) const
{
    if (index < 0 || index >= items.count())
        return 0;
    return items.at(index);
}

QLayoutItem *QToolBarLayout::takeAt(int index)
{
    if (index < 0 || index >= items.count())
        return 0;
    QToolBarItem *item = items.takeAt(index);

    QWidgetAction *widgetAction = qobject_cast<QWidgetAction*>(item->action);
    if (widgetAction != 0 && item->customWidget) {
        widgetAction->releaseWidget(item->widget());
    } else {
        // destroy the QToolButton/QToolBarSeparator
        item->widget()->hide();
        item->widget()->deleteLater();
    }

    invalidate();
    return item;
}

void QToolBarLayout::insertAction(int index, QAction *action)
{
    index = qMax(0, index);
    index = qMin(items.count(), index);

    QToolBarItem *item = createItem(action);
    if (item) {
        items.insert(index, item);
        invalidate();
    }
}

int QToolBarLayout::indexOf(QAction *action) const
{
    for (int i = 0; i < items.count(); ++i) {
        if (items.at(i)->action == action)
            return i;
    }
    return -1;
}

int QToolBarLayout::count() const
{
    return items.count();
}

bool QToolBarLayout::isEmpty() const
{
    if (dirty)
        updateGeomArray();
    return empty;
}

void QToolBarLayout::invalidate()
{
    dirty = true;
    QLayout::invalidate();
}

Qt::Orientations QToolBarLayout::expandingDirections() const
{
    if (dirty)
        updateGeomArray();
    QToolBar *tb = qobject_cast<QToolBar*>(parentWidget());
    Qt::Orientation o = tb->orientation();
    return expanding ? Qt::Orientations(o) : Qt::Orientations(0);
}

bool QToolBarLayout::movable() const
{
    QToolBar *tb = qobject_cast<QToolBar*>(parentWidget());
    QMainWindow *win = qobject_cast<QMainWindow*>(tb->parentWidget());
    return tb->isMovable() && win != 0;
}

void QToolBarLayout::updateGeomArray() const
{
    if (!dirty)
        return;

    QToolBarLayout *that = const_cast<QToolBarLayout*>(this);

    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();

    that->minSize = QSize(0, 0);
    that->hint = QSize(0, 0);
    rperp(o, that->minSize) = style->pixelMetric(QStyle::PM_ToolBarHandleExtent, &opt, tb);
    rperp(o, that->hint) = style->pixelMetric(QStyle::PM_ToolBarHandleExtent, &opt, tb);

    that->expanding = false;
    that->empty = false;

    QVector<QLayoutStruct> a(items.count() + 1); // + 1 for the stretch

    int count = 0;
    for (int i = 0; i < items.count(); ++i) {
        QToolBarItem *item = items.at(i);

        QSize max = item->maximumSize();
        QSize min = item->minimumSize();
        QSize hint = item->sizeHint();
        Qt::Orientations exp = item->expandingDirections();
        bool empty = item->isEmpty();

        that->expanding = expanding || exp & o;

        if (!empty) {
            if (count == 0) // the minimum size only displays one widget
                rpick(o, that->minSize) += spacing + pick(o, min);
            int s = perp(o, minSize);
            rperp(o, that->minSize) = qMax(s, perp(o, min));

            rpick(o, that->hint) += spacing + pick(o, hint);
            s = perp(o, that->hint);
            rperp(o, that->hint) = qMax(s, perp(o, hint));
            ++count;
        }

        a[i].sizeHint = pick(o, hint);
        a[i].maximumSize = pick(o, max);
        a[i].minimumSize = pick(o, min);
        a[i].expansive = exp & o;
        if (o == Qt::Horizontal)
            a[i].stretch = item->widget()->sizePolicy().horizontalStretch();
        else
            a[i].stretch = item->widget()->sizePolicy().verticalStretch();
        a[i].empty = empty;
    }

    that->geomArray = a;
    that->empty = count == 0;

    rpick(o, that->minSize) += handleExtent;
    that->minSize += QSize(2*margin, 2*margin);
    if (items.count() > 1)
        rpick(o, that->minSize) += spacing + extensionExtent;

    rpick(o, that->hint) += handleExtent;
    that->hint += QSize(2*margin, 2*margin);
#ifdef Q_WS_MAC
    if (QMainWindow *mw = qobject_cast<QMainWindow *>(parentWidget()->parentWidget())) {
        if (mw->unifiedTitleAndToolBarOnMac()
                && mw->toolBarArea(static_cast<QToolBar *>(parentWidget())) == Qt::TopToolBarArea) {
            tb->setMaximumSize(hint);
        }
    }
#endif

    that->dirty = false;
}

static bool defaultWidgetAction(QAction *action)
{
    QWidgetAction *a = qobject_cast<QWidgetAction*>(action);
    return a != 0 && a->defaultWidget() != 0;
}

void QToolBarLayout::setGeometry(const QRect &rect)
{
    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 extensionExtent = style->pixelMetric(QStyle::PM_ToolBarExtensionExtent, &opt, tb);
    Qt::Orientation o = tb->orientation();

    QLayout::setGeometry(rect);

    if (movable()) {
        if (o == Qt::Horizontal) {
            handRect = QRect(margin, margin, handleExtent, rect.height() - 2*margin);
            handRect = QStyle::visualRect(parentWidget()->layoutDirection(), rect, handRect);
        } else {
            handRect = QRect(margin, margin, rect.width() - 2*margin, handleExtent);
        }
    } else {
        handRect = QRect();
    }

    bool ranOutOfSpace = false;
    if (!animating)
        ranOutOfSpace = layoutActions(rect.size());