qwsmanager_qws.cpp

奇趣公司比较新的qt/emd版本

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#include "qwsmanager_qws.h"

#ifndef QT_NO_QWS_MANAGER

#include "qdrawutil.h"
#include "qapplication.h"
#include "qstyle.h"
#include "qwidget.h"
#include "qmenu.h"
#include "qpainter.h"
#include "private/qpainter_p.h"
#include "qregion.h"
#include "qevent.h"
#include "qcursor.h"
#include "qwsdisplay_qws.h"
#include "qdesktopwidget.h"

#include <private/qapplication_p.h>
#include <private/qwidget_p.h>
#include <private/qbackingstore_p.h>
#include <private/qwindowsurface_qws_p.h>
#include "qdecorationfactory_qws.h"

#include "qlayout.h"

#include "qwsmanager_p.h"

#include <qdebug.h>

QWidget *QWSManagerPrivate::active = 0;
QPoint QWSManagerPrivate::mousePos;


QWSManagerPrivate::QWSManagerPrivate()
    : QObjectPrivate(), activeRegion(QDecoration::None), managed(0), popup(0),
      previousRegionType(0), previousRegionRepainted(false)
{
    cached_region.regionType = 0;
}

QRegion &QWSManager::cachedRegion()
{
    return d_func()->cached_region.region;
}

/*!
    \class QWSManager
    \ingroup qws
    \internal
*/

/*!

*/
QWSManager::QWSManager(QWidget *w)
    : QObject(*new QWSManagerPrivate, (QObject*)0)
{
    d_func()->managed = w;

}

QWSManager::~QWSManager()
{
    Q_D(QWSManager);
#ifndef QT_NO_MENU
    if (d->popup)
        delete d->popup;
#endif
    if (d->managed == QWSManagerPrivate::active)
        QWSManagerPrivate::active = 0;
}

QWidget *QWSManager::widget()
{
    Q_D(QWSManager);
    return d->managed;
}

QWidget *QWSManager::grabbedMouse()
{
    return QWSManagerPrivate::active;
}

QRegion QWSManager::region()
{
    Q_D(QWSManager);
    return QApplication::qwsDecoration().region(d->managed, d->managed->geometry());
}

bool QWSManager::event(QEvent *e)
{
    if (QObject::event(e))
        return true;

    switch (e->type()) {
        case QEvent::MouseMove:
            mouseMoveEvent((QMouseEvent*)e);
            break;

        case QEvent::MouseButtonPress:
            mousePressEvent((QMouseEvent*)e);
            break;

        case QEvent::MouseButtonRelease:
            mouseReleaseEvent((QMouseEvent*)e);
            break;

        case QEvent::MouseButtonDblClick:
            mouseDoubleClickEvent((QMouseEvent*)e);
            break;

        case QEvent::Paint:
            paintEvent((QPaintEvent*)e);
            break;

        default:
            return false;
            break;
    }

    return true;
}

void QWSManager::mousePressEvent(QMouseEvent *e)
{
    Q_D(QWSManager);
    d->mousePos = e->globalPos();
    d->activeRegion = QApplication::qwsDecoration().regionAt(d->managed, d->mousePos);
    if(d->cached_region.regionType)
        d->previousRegionRepainted |= repaintRegion(d->cached_region.regionType, QDecoration::Pressed);

    if (d->activeRegion == QDecoration::Menu) {
        QPoint pos = (QApplication::layoutDirection() == Qt::LeftToRight
                      ? d->managed->geometry().topLeft()
                      : d->managed->geometry().topRight());
        menu(pos);
    }
    if (d->activeRegion != QDecoration::None &&
         d->activeRegion != QDecoration::Menu) {
        d->active = d->managed;
        d->managed->grabMouse();
    }
    if (d->activeRegion != QDecoration::None &&
         d->activeRegion != QDecoration::Close &&
         d->activeRegion != QDecoration::Minimize &&
         d->activeRegion != QDecoration::Menu) {
        d->managed->raise();
    }

    if (e->button() == Qt::RightButton) {
        menu(e->globalPos());
    }
}

void QWSManager::mouseReleaseEvent(QMouseEvent *e)
{
    Q_D(QWSManager);
    d->managed->releaseMouse();
    if (d->cached_region.regionType && d->previousRegionRepainted && QApplication::mouseButtons() == 0) {
        bool doesHover = repaintRegion(d->cached_region.regionType, QDecoration::Hover);
        if (!doesHover) {
            repaintRegion(d->cached_region.regionType, QDecoration::Normal);
            d->previousRegionRepainted = false;
        }
    }

    if (e->button() == Qt::LeftButton) {
        //handleMove();
        int itm = QApplication::qwsDecoration().regionAt(d->managed, e->globalPos());
        int activatedItem = d->activeRegion;
        d->activeRegion = QDecoration::None;
        d->active = 0;
        if (activatedItem == itm)
            QApplication::qwsDecoration().regionClicked(d->managed, itm);
    } else if (d->activeRegion == QDecoration::None) {
        d->active = 0;
    }
}

void QWSManager::mouseDoubleClickEvent(QMouseEvent *e)
{
    Q_D(QWSManager);
    if (e->button() == Qt::LeftButton)
        QApplication::qwsDecoration().regionDoubleClicked(d->managed,
            QApplication::qwsDecoration().regionAt(d->managed, e->globalPos()));
}

static inline Qt::CursorShape regionToShape(int region)
{
    if (region == QDecoration::None)
        return Qt::ArrowCursor;

    static const struct {
        int region;
        Qt::CursorShape shape;
    } r2s[] = {
        { QDecoration::TopLeft,     Qt::SizeFDiagCursor },
        { QDecoration::Top,         Qt::SizeVerCursor},
        { QDecoration::TopRight,    Qt::SizeBDiagCursor},
        { QDecoration::Left,        Qt::SizeHorCursor},
        { QDecoration::Right,       Qt::SizeHorCursor},
        { QDecoration::BottomLeft,  Qt::SizeBDiagCursor},
        { QDecoration::Bottom,      Qt::SizeVerCursor},
        { QDecoration::BottomRight, Qt::SizeFDiagCursor},
        { QDecoration::None,        Qt::ArrowCursor}
    };

    int i = 0;
    while (region != r2s[i].region && r2s[i].region)
        ++i;
    return r2s[i].shape;
}

void QWSManager::mouseMoveEvent(QMouseEvent *e)
{
    Q_D(QWSManager);
    if (d->newCachedRegion(e->globalPos())) {
        if(d->previousRegionType && d->previousRegionRepainted)
            repaintRegion(d->previousRegionType, QDecoration::Normal);
        if(d->cached_region.regionType) {
            d->previousRegionRepainted = repaintRegion(d->cached_region.regionType, QDecoration::Hover);
        }
    }


#ifndef QT_NO_CURSOR
    QWSDisplay *qwsd = QApplication::desktop()->qwsDisplay();
    qwsd->selectCursor(d->managed, regionToShape(d->cachedRegionAt()));
#endif //QT_NO_CURSOR

    if (d->activeRegion)
        handleMove(e->globalPos());
}

void QWSManager::handleMove(QPoint g)
{
    Q_D(QWSManager);

    // don't allow dragging to where the user probably cannot click!
    QApplicationPrivate *ap = QApplicationPrivate::instance();
    const QRect maxWindowRect = ap->maxWindowRect(qt_screen);
    if (maxWindowRect.isValid()) {
        if (g.x() < maxWindowRect.x())
            g.setX(maxWindowRect.x());
        if (g.y() < maxWindowRect.y())
            g.setY(maxWindowRect.y());
        if (g.x() > maxWindowRect.right())
            g.setX(maxWindowRect.right());