source: trunk/src/gui/embedded/qscreenmulti_qws.cpp@ 855

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#include "qscreenmulti_qws_p.h"

#ifndef QT_NO_QWS_MULTISCREEN

#include <qlist.h>
#include <qstringlist.h>
#include <qwidget.h>
#include <qdebug.h>

QT_BEGIN_NAMESPACE

#ifndef QT_NO_QWS_CURSOR

class QMultiScreenCursor : public QScreenCursor
{
public:
    QMultiScreenCursor() : currentCursor(qt_screencursor) { enable = false; }
    ~QMultiScreenCursor() { qt_screencursor = 0; }

    void set(const QImage &image, int hotx, int hoty);
    void move(int x, int y);
    void show();
    void hide();

    void addCursor(QScreenCursor *cursor);

private:
    void setCurrentCursor(QScreenCursor *newCursor);

    QScreenCursor *currentCursor;
    QList<QScreenCursor*> cursors;
};

void QMultiScreenCursor::set(const QImage &image, int hotx, int hoty)
{
    QScreenCursor::set(image, hotx, hoty);
    if (currentCursor)
        currentCursor->set(image, hotx, hoty);
}

void QMultiScreenCursor::setCurrentCursor(QScreenCursor *newCursor)
{
    *((QScreenCursor*)this) = *newCursor;
    currentCursor = newCursor;
}

// XXX: this is a mess!
void QMultiScreenCursor::move(int x, int y)
{
    const int oldIndex = qt_screen->subScreenIndexAt(pos);
    QScreenCursor::move(x, y); // updates pos
    const int newIndex = qt_screen->subScreenIndexAt(pos);

    if (!currentCursor && oldIndex != -1)
        setCurrentCursor(cursors.at(oldIndex));
    QScreenCursor *oldCursor = currentCursor;

    if (oldIndex != -1) {
        const QScreen *oldScreen = qt_screen->subScreens().at(oldIndex);
        if (newIndex == -1 || oldScreen->region().contains(pos)) {
            oldCursor->move(x, y);
            return;
        }
    }

    if (newIndex != -1) {
        QScreenCursor *newCursor = cursors.at(newIndex);
        newCursor->set(cursor, hotspot.x(), hotspot.y());

        if (oldCursor) {
            if (oldCursor->isVisible())
                newCursor->show();
            oldCursor->hide();
        }

        newCursor->move(x, y);

        setCurrentCursor(newCursor);
    }
}

void QMultiScreenCursor::show()
{
    if (currentCursor)
        currentCursor->show();
}

void QMultiScreenCursor::hide()
{
    if (currentCursor)
        currentCursor->hide();
}

void QMultiScreenCursor::addCursor(QScreenCursor *cursor)
{
    cursors.append(cursor);
}

#endif

class QMultiScreenPrivate
{
public:
    QMultiScreenPrivate()
#ifndef QT_NO_QWS_CURSOR
        : cursor(0)
#endif
    {}
    ~QMultiScreenPrivate()
    {
#ifndef QT_NO_QWS_CURSOR
        delete cursor;
#endif
    }

    QList<QScreen*> screens;
    QRegion region;
#ifndef QT_NO_QWS_CURSOR
    QMultiScreenCursor *cursor;
#endif
};

QMultiScreen::QMultiScreen(int displayId)
    : QScreen(displayId, MultiClass), d_ptr(new QMultiScreenPrivate)
{
}

QMultiScreen::~QMultiScreen()
{
    delete d_ptr;
}

bool QMultiScreen::initDevice()
{
    bool ok = true;

#ifndef QT_NO_QWS_CURSOR
    d_ptr->cursor = new QMultiScreenCursor;
#endif

    const int n = d_ptr->screens.count();
    for (int i = 0; i < n; ++i) {
        QScreen *s = d_ptr->screens.at(i);