C++ (Cpp) QGraphicsWidget::scene Examples

Example #1

File: qgraphicswidget_p.cpp Project: husninazer/qt

/**
 * is called after a reparent has taken place to fix up the focus chain(s)
 */
void QGraphicsWidgetPrivate::fixFocusChainBeforeReparenting(QGraphicsWidget *newParent, QGraphicsScene *oldScene, QGraphicsScene *newScene)
{
    Q_Q(QGraphicsWidget);

    Q_ASSERT(focusNext && focusPrev);

    QGraphicsWidget *n = q;     //last one in 'new' list
    QGraphicsWidget *o = 0;     //last one in 'old' list

    QGraphicsWidget *w = focusNext;

    QGraphicsWidget *firstOld = 0;
    bool wasPreviousNew = true;

    while (w != q) {
        bool isCurrentNew = q->isAncestorOf(w);
        if (isCurrentNew) {
            if (!wasPreviousNew) {
                n->d_func()->focusNext = w;
                w->d_func()->focusPrev = n;
            }
            n = w;
        } else /*if (!isCurrentNew)*/ {
            if (wasPreviousNew) {
                if (o) {
                    o->d_func()->focusNext = w;
                    w->d_func()->focusPrev = o;
                } else {
                    firstOld = w;
                }
            }
            o = w;
        }
        w = w->d_func()->focusNext;
        wasPreviousNew = isCurrentNew;
    }

    // repair the 'old' chain
    if (firstOld) {
        o->d_func()->focusNext = firstOld;
        firstOld->d_func()->focusPrev = o;
    }

    // update tabFocusFirst for oldScene if the item is going to be removed from oldScene
    if (newParent)
        newScene = newParent->scene();

    if (oldScene && newScene != oldScene)
        oldScene->d_func()->tabFocusFirst = (firstOld && firstOld->scene() == oldScene) ? firstOld : 0;

    QGraphicsItem *topLevelItem = newParent ? newParent->topLevelItem() : 0;
    QGraphicsWidget *topLevel = 0;
    if (topLevelItem && topLevelItem->isWidget())
        topLevel = static_cast<QGraphicsWidget *>(topLevelItem);

    if (topLevel && newParent) {
        QGraphicsWidget *last = topLevel->d_func()->focusPrev;
        // link last with new chain
        last->d_func()->focusNext = q;
        focusPrev = last;

        // link last in chain with
        topLevel->d_func()->focusPrev = n;
        n->d_func()->focusNext = topLevel;
    } else {
        // q is the start of the focus chain
        n->d_func()->focusNext = q;
        focusPrev = n;
    }

}

Example #2

File: nsFilePicker.cpp Project: lofter2011/Icefox

/* short show (); */
NS_IMETHODIMP
nsFilePicker::Show(PRInt16* aReturn)
{
    nsCAutoString directory;
    if (mDisplayDirectory) {
        mDisplayDirectory->GetNativePath(directory);
    }

    QStringList filters;
    PRUint32 count = mFilters.Length();
    for (PRUint32 i = 0; i < count; ++i) {
        filters.append(mFilters[i].get());
    }

    QGraphicsWidget* parentWidget = 0;
    if (mParent) {
        parentWidget = static_cast<QGraphicsWidget*>
            (mParent->GetNativeData(NS_NATIVE_WIDGET));
    }

    QWidget* parentQWidget = 0;
    if (parentWidget && parentWidget->scene()) {
        if (parentWidget->scene()->views().size()>0) {
            parentQWidget = parentWidget->scene()->views()[0];
        }
    }

    QStringList files;
    QString selected;

    switch (mMode) {
    case nsIFilePicker::modeOpen:
        selected = MozFileDialog::getOpenFileName(parentQWidget, mCaption,
                                                  directory.get(), filters.join(";"));
        if (selected.isNull()) {
            *aReturn = nsIFilePicker::returnCancel;
            return NS_OK;
        }
        break;
    case nsIFilePicker::modeOpenMultiple:
        files = MozFileDialog::getOpenFileNames(parentQWidget, mCaption,
                                                directory.get(), filters.join(";"));
        if (files.empty()) {
            *aReturn = nsIFilePicker::returnCancel;
            return NS_OK;
        }
        selected = files[0];
        break;
    case nsIFilePicker::modeSave:
    {
        nsCOMPtr<nsIFile> targetFile;
        NS_GetSpecialDirectory(NS_UNIX_XDG_DOCUMENTS_DIR,
                               getter_AddRefs(targetFile));
        if (!targetFile) {
            // failed to get the XDG directory, using $HOME for now
            NS_GetSpecialDirectory(NS_UNIX_HOME_DIR,
                                   getter_AddRefs(targetFile));
        }

        if (targetFile) {
            targetFile->Append(mDefault);
            nsString targetPath;
            targetFile->GetPath(targetPath);

            bool exists = false;
            targetFile->Exists(&exists);
            if (exists) {
                // file exists already create temporary filename
                QTemporaryFile temp(QString::fromUtf16(targetPath.get()));
                temp.open();
                selected = temp.fileName();
                temp.close();
            } else {
                selected = QString::fromUtf16(targetPath.get());
            }
        }
    }
    break;
    case nsIFilePicker::modeGetFolder:
        selected = MozFileDialog::getExistingDirectory(parentQWidget, mCaption,
                                                       directory.get());
        if (selected.isNull()) {
            *aReturn = nsIFilePicker::returnCancel;
            return NS_OK;
        }
    break;
    default:
    break;
    }

    if (!selected.isEmpty()) {
        QString path = QFile::encodeName(selected);
        mFile.Assign(path.toUtf8().data());
    }

    *aReturn = nsIFilePicker::returnOK;
    if (mMode == modeSave) {
        nsCOMPtr<nsIFile> file;
        GetFile(getter_AddRefs(file));
        if (file) {
            bool exists = false;
            file->Exists(&exists);
            if (exists) {
                *aReturn = nsIFilePicker::returnReplace;
            }
        }
    }

    return NS_OK;
}