qwindowsvistastyle.cpp

奇趣公司比较新的qt/emd版本

    } else {
        _running = false;
    }
    drawBlendedImage(painter, option->rect, alpha);
}


/*!
 \reimp
 *
 * Animations are used for some state transitions on specific widgets.
 *
 * Only one running animation can exist for a widget at any specific time.
 * Animations can be added through QWindowsVistaStylePrivate::startAnimation(Animation *)
 * and any existing animation on a widget can be retrieved with
 * QWindowsVistaStylePrivate::widgetAnimation(Widget *).
 *
 * Once an animation has been started, QWindowsVistaStylePrivate::timerEvent(QTimerEvent *)
 * will continuously call update() on the widget until it is stopped, meaning that drawPrimitive
 * will be called many times until the transition has completed. During this time, the result
 * will be retrieved by the Animation::paint(...) function and not by the style itself.
 *
 * To determine if a transition should occur, the style needs to know the previous state of the
 * widget as well as the current one. This is solved by updating dynamic properties on the widget
 * every time the function is called.
 *
 * Transitions interrupting existing transitions should always be smooth, so whenever a hover-transition
 * is started on a pulsating button, it uses the current frame of the pulse-animation as the
 * starting image for the hover transition.
 *
 */
void QWindowsVistaStyle::drawPrimitive(PrimitiveElement element, const QStyleOption *option,
                                    QPainter *painter, const QWidget *widget) const
{
    QWindowsVistaStylePrivate *d = const_cast<QWindowsVistaStylePrivate*>(d_func());

    int state = option->state;
    if (!QWindowsVistaStylePrivate::useVista()) {
        QWindowsStyle::drawPrimitive(element, option, painter, widget);
        return;
    }

    QRect oldRect;
    QRect newRect;

    if (widget && d->transitionsEnabled())
    {
        /* all widgets that supports state transitions : */
        if ((qobject_cast<const QLineEdit*>(widget) && element == PE_FrameLineEdit) ||
            (qobject_cast<const QRadioButton*>(widget)&& element == PE_IndicatorRadioButton) ||
            (qobject_cast<const QCheckBox*>(widget) && element == PE_IndicatorCheckBox) ||
            (qobject_cast<const QGroupBox *>(widget)&& element == PE_IndicatorCheckBox) ||
            (qobject_cast<const QToolButton*>(widget) && element == PE_PanelButtonBevel)
        )
        {
            // Retrieve and update the dynamic properties tracking
            // the previous state of the widget:
            QWidget *w = const_cast<QWidget *> (widget);
            int oldState = w->property("_q_stylestate").toInt();
            oldRect = w->property("_q_stylerect").toRect();
            newRect = w->rect();
            w->setProperty("_q_stylestate", (int)option->state);
            w->setProperty("_q_stylerect", w->rect());

            bool doTransition = ((state & State_Sunken)     != (oldState & State_Sunken) ||
                                 (state & State_On)         != (oldState & State_On)     ||
                                 (state & State_MouseOver)  != (oldState & State_MouseOver));

            if (oldRect != newRect ||
                (state & State_Enabled) != (oldState & State_Enabled) ||
                (state & State_Active)  != (oldState & State_Active))
                    d->stopAnimation(widget);

            if (const QLineEdit *edit = qobject_cast<const QLineEdit *>(widget))
                if (edit->isReadOnly() && element == PE_FrameLineEdit) // Do not animate read only line edits
                    doTransition = false;

            if (doTransition) {

                // We create separate images for the initial and final transition states and store them in the
                // Transition object.
                QImage startImage(option->rect.size(), QImage::Format_ARGB32_Premultiplied);
                QImage endImage(option->rect.size(), QImage::Format_ARGB32_Premultiplied);
                QStyleOption opt = *option;

                opt.rect.setRect(0, 0, option->rect.width(), option->rect.height());
                opt.state = (QStyle::State)oldState;
                startImage.fill(0);
                QPainter startPainter(&startImage);

                Animation *anim = d->widgetAnimation(widget);
                Transition *t = new Transition;
                t->setWidget(w);

                // If we have a running animation on the widget already, we will use that to paint the initial
                // state of the new transition, this ensures a smooth transition from a current animation such as a
                // pulsating default button into the intended target state.

                if (!anim)
                    drawPrimitive(element, &opt, &startPainter, 0); // Note that the widget pointer is intentionally 0
                else                                               // this ensures that we do not recurse in the animation logic above
                    anim->paint(&startPainter, &opt);

                d->startAnimation(t);
                t->setStartImage(startImage);

                // The end state of the transition is simply the result we would have painted
                // if the style was not animated.

                QPainter endPainter(&endImage);
                endImage.fill(0);
                QStyleOption opt2 = opt;
                opt2.state = option->state;
                drawPrimitive(element, &opt2, &endPainter, 0); // Note that the widget pointer is intentionally 0
                                                              // this ensures that we do not recurse in the animation logic above
                t->setEndImage(endImage);

                HTHEME theme;
                int partId;
                int duration;
                int fromState = 0;
                int toState = 0;

                //translate state flags to UXTHEME states :
                if (element == PE_FrameLineEdit) {
                    theme = pOpenThemeData(0, L"Edit");
                    partId = EP_EDITBORDER_NOSCROLL;

                    if (oldState & State_MouseOver)
                        fromState = ETS_HOT;
                    else if (oldState & State_HasFocus)
                        fromState = ETS_FOCUSED;
                    else
                        fromState = ETS_NORMAL;

                    if (state & State_MouseOver)
                        toState = ETS_HOT;
                    else if (state & State_HasFocus)
                        toState = ETS_FOCUSED;
                    else
                        toState = ETS_NORMAL;

                } else {
                    theme = pOpenThemeData(0, L"Button");
                    if (element == PE_IndicatorRadioButton)
                        partId = BP_RADIOBUTTON;
                    else if (element == PE_IndicatorCheckBox)
                        partId = BP_CHECKBOX;
                    else
                        partId = BP_PUSHBUTTON;

                    fromState = buttonStateId(oldState, partId);
                    toState = buttonStateId(option->state, partId);
                }

                // Retrieve the transition time between the states from the system.
                if (theme && pGetThemeTransitionDuration(theme, partId, fromState, toState,
                    TMT_TRANSITIONDURATIONS, &duration) == S_OK)
                {
                    t->setDuration(duration);
                }
                t->setStartTime(QTime::currentTime());
            }
        }
    } // End of animation part


    QRect rect = option->rect;

    switch (element) {
    case PE_IndicatorHeaderArrow:
        if (const QStyleOptionHeader *header = qstyleoption_cast<const QStyleOptionHeader *>(option)) {
            int stateId = HSAS_SORTEDDOWN;
            if (header->sortIndicator & QStyleOptionHeader::SortDown)
                stateId = HSAS_SORTEDUP; //note that the uxtheme sort down indicator is the inverse of ours
            XPThemeData theme(widget, painter, QLatin1String("HEADER"), HP_HEADERSORTARROW, stateId, option->rect);
            d->drawBackground(theme);
        }
        break;

    case PE_IndicatorBranch: 
        {
            //enable vista explorer style tree branches for tree views 
            if (!qobject_cast<const QTreeView *>(widget)) {
                QWindowsXPStyle::drawPrimitive(element, option, painter, widget);
                return;
            }
            if (!d->treeViewHelper) {
                d->treeViewHelper = new QWidget(0);
                pSetWindowTheme(d->treeViewHelper ->winId(), L"explorer", NULL);
            }
            XPThemeData theme(d->treeViewHelper, painter, QLatin1String("TREEVIEW"));
            static const int decoration_size = 16;
            int mid_h = option->rect.x() + option->rect.width() / 2;
            int mid_v = option->rect.y() + option->rect.height() / 2;
            int bef_h = mid_h;
            int bef_v = mid_v;
            int aft_h = mid_h;
            int aft_v = mid_v;
            if (option->state & State_Children) {
                int delta = decoration_size / 2;
                theme.rect = QRect(bef_h - delta, bef_v - delta, decoration_size, decoration_size);
                theme.partId = option->state & State_MouseOver ? TVP_HOTGLYPH : TVP_GLYPH;
                theme.stateId = option->state & QStyle::State_Open ? GLPS_OPENED : GLPS_CLOSED;
                d->drawBackground(theme);
                bef_h -= delta + 2;
                bef_v -= delta + 2;
                aft_h += delta - 2;
                aft_v += delta - 2;
            }
#if 0
            QBrush brush(option->palette.dark().color(), Qt::Dense4Pattern);
            if (option->state & State_Item) {
                if (option->direction == Qt::RightToLeft)
                    painter->fillRect(option->rect.left(), mid_v, bef_h - option->rect.left(), 1, brush);
                else
                    painter->fillRect(aft_h, mid_v, option->rect.right() - aft_h + 1, 1, brush);
            }
            if (option->state & State_Sibling && option->rect.bottom() > aft_v)
                painter->fillRect(mid_h, aft_v, 1, option->rect.bottom() - aft_v + 1, brush);
            if (option->state & (State_Open | State_Children | State_Item | State_Sibling) && (bef_v > option->rect.y()))
                painter->fillRect(mid_h, option->rect.y(), 1, bef_v - option->rect.y(), brush);
#endif
        }
        break; 

    case PE_PanelButtonBevel:
    case PE_IndicatorCheckBox:
    case PE_IndicatorRadioButton:
        {
            if (Animation *a = d->widgetAnimation(widget)) {
                a->paint(painter, option);
            } else {
                QWindowsXPStyle::drawPrimitive(element, option, painter, widget);
            }
        }
        break;

    case PE_IndicatorToolBarHandle:
        {
            XPThemeData theme;
            if (option->state & State_Horizontal)
                theme = XPThemeData(widget, painter, QLatin1String("REBAR"), RP_GRIPPER, ETS_NORMAL, option->rect.adjusted(0, 1, -2, -2));
            else
                theme = XPThemeData(widget, painter, QLatin1String("REBAR"), RP_GRIPPERVERT, ETS_NORMAL, option->rect.adjusted(0, 1, -2, -2));
            d->drawBackground(theme);
        }
        break;

    case PE_FrameMenu:
        {
            int stateId = option->state & State_Active ? MB_ACTIVE : MB_INACTIVE;
            XPThemeData theme(widget, painter, QLatin1String("MENU"), MENU_POPUPBORDERS, stateId, option->rect);
            d->drawBackground(theme);
        }
        break;
    case PE_Frame:
        if (const QTextEdit *edit = qobject_cast<const QTextEdit*>(widget)) {
            int stateId = ETS_NORMAL;
            if (!(state & State_Enabled))
                stateId = ETS_DISABLED;
            else if (edit->isReadOnly())
                stateId = ETS_READONLY;
            else if (state & State_HasFocus)
                stateId = ETS_SELECTED;
            XPThemeData theme(widget, painter, QLatin1String("EDIT"), EP_EDITBORDER_HVSCROLL, stateId, option->rect);
            d->drawBackground(theme);
        } else
            QWindowsXPStyle::drawPrimitive(element, option, painter, widget);
        break;

    case PE_PanelLineEdit:
        if (const QStyleOptionFrame *panel = qstyleoption_cast<const QStyleOptionFrame *>(option)) {
            QBrush bg;
            bool usePalette = false;
            bool isEnabled = option->state & State_Enabled;
            uint resolve_mask = panel->palette.resolve();
            if (resolve_mask & (1 << QPalette::Base)) {
                // Base color is set for this widget, so use it
                bg = panel->palette.brush(QPalette::Base);
                usePalette = true;
            }
            if (usePalette) {
                painter->fillRect(panel->rect, bg);
            } else {
                int partId = EP_BACKGROUND;