C++ QStyleOptionFocusRect::init方法代码示例

void ColorButton::drawButton(QPainter *p)
{
	QStyleOptionButton buttonOptions;
	buttonOptions.init(this);
	buttonOptions.features = QStyleOptionButton::None;
	buttonOptions.rect = rect();
	buttonOptions.palette = palette();
	buttonOptions.state = (isDown() ? QStyle::State_Sunken : QStyle::State_Raised);

	if (!mIsFlat)
	{
		style()->drawPrimitive(QStyle::PE_PanelButtonBevel, &buttonOptions, p, this);
	}
	else
	{
		style()->drawPrimitive(QStyle::PE_FrameDefaultButton, &buttonOptions, p, this);
	}

	p->save();
	drawButtonLabel(p);
	p->restore();

	QStyleOptionFocusRect frectOptions;
	frectOptions.init(this);
	frectOptions.rect = style()->subElementRect(QStyle::SE_PushButtonFocusRect, &buttonOptions, this);
	if (hasFocus())
	{
		style()->drawPrimitive(QStyle::PE_FrameFocusRect, &frectOptions, p, this);
	}
}

void QwtPainter::drawFocusRect(QPainter *painter, QWidget *widget,
    const QRect &rect)
{
#if QT_VERSION < 0x040000
        widget->style().drawPrimitive(QStyle::PE_FocusRect, painter,
            rect, widget->colorGroup());
#else
        QStyleOptionFocusRect opt;
        opt.init(widget);
        opt.rect = rect;
        opt.state |= QStyle::State_HasFocus;

        widget->style()->drawPrimitive(QStyle::PE_FrameFocusRect,
            &opt, painter, widget);
#endif

}

void ColorButton::paintEvent( QPaintEvent * )
{
  QPainter painter(this);

  //First, we need to draw the bevel.
  QStyleOptionButton butOpt;
  initStyleOption(&butOpt);
  style()->drawControl( QStyle::CE_PushButtonBevel, &butOpt, &painter, this );

  //OK, now we can muck around with drawing out pretty little color box
  //First, sort out where it goes
  QRect labelRect = style()->subElementRect( QStyle::SE_PushButtonContents,
      &butOpt, this );
  int shift = style()->pixelMetric( QStyle::PM_ButtonMargin );
  labelRect.adjust(shift, shift, -shift, -shift);
  int x, y, w, h;
  labelRect.getRect(&x, &y, &w, &h);

  if (isChecked() || isDown()) {
    x += style()->pixelMetric( QStyle::PM_ButtonShiftHorizontal );
    y += style()->pixelMetric( QStyle::PM_ButtonShiftVertical   );
  }

  QColor fillCol = isEnabled() ? btnColor : palette().color(backgroundRole());
  qDrawShadePanel( &painter, x, y, w, h, palette(), true, 1, NULL);
  if ( fillCol.isValid() )
    painter.fillRect( x+1, y+1, w-2, h-2, fillCol );

  if ( hasFocus() ) {
    QRect focusRect = style()->subElementRect( QStyle::SE_PushButtonFocusRect, &butOpt, this );
    QStyleOptionFocusRect focusOpt;
    focusOpt.init(this);
    focusOpt.rect            = focusRect;
    focusOpt.backgroundColor = palette().background().color();
    style()->drawPrimitive( QStyle::PE_FrameFocusRect, &focusOpt, &painter, this );
  }
}

void Q3GroupBox::drawFrame(QPainter *p)
{
    QPoint      p1, p2;
    QStyleOptionFrame opt;
    opt.init(this);

    int frameShape  = d->frameStyle & QFrame::Shape_Mask;
    int frameShadow = d->frameStyle & QFrame::Shadow_Mask;

    int lw = 0;
    int mlw = 0;
    opt.rect = frameRect();

    switch (frameShape) {
    case QFrame::Box:
    case QFrame::HLine:
    case QFrame::VLine:
    case QFrame::StyledPanel:
        lw = d->lineWidth;
        mlw = d->midLineWidth;
        break;
    default:
        // most frame styles do not handle customized line and midline widths
        // (see updateFrameWidth()).
        lw = d->frameWidth;
        break;
    }
    opt.lineWidth = lw;
    opt.midLineWidth = mlw;
    if (frameShadow == Sunken)
        opt.state |= QStyle::State_Sunken;
    else if (frameShadow == Raised)
        opt.state |= QStyle::State_Raised;

    switch (frameShape) {
    case Box:
        if (frameShadow == Plain)
            qDrawPlainRect(p, opt.rect, opt.palette.foreground().color(), lw);
        else
            qDrawShadeRect(p, opt.rect, opt.palette, frameShadow == Sunken, lw, mlw);
        break;

    case StyledPanel:
        style()->drawPrimitive(QStyle::PE_Frame, &opt, p, this);
        break;

    case Panel:
        if (frameShadow == Plain)
            qDrawPlainRect(p, opt.rect, opt.palette.foreground().color(), lw);
        else
            qDrawShadePanel(p, opt.rect, opt.palette, frameShadow == Sunken, lw);
        break;

    case WinPanel:
        if (frameShadow == Plain)
            qDrawPlainRect(p, opt.rect, opt.palette.foreground().color(), lw);
        else
            qDrawWinPanel(p, opt.rect, opt.palette, frameShadow == Sunken);
        break;
    case HLine:
    case VLine:
        if (frameShape == HLine) {
            p1 = QPoint(opt.rect.x(), opt.rect.height() / 2);
            p2 = QPoint(opt.rect.x() + opt.rect.width(), p1.y());
        } else {
            p1 = QPoint(opt.rect.x()+opt.rect.width() / 2, 0);
            p2 = QPoint(p1.x(), opt.rect.height());
        }
        if (frameShadow == Plain) {
            QPen oldPen = p->pen();
            p->setPen(QPen(opt.palette.foreground().color(), lw));
            p->drawLine(p1, p2);
            p->setPen(oldPen);
        } else {
            qDrawShadeLine(p, p1, p2, opt.palette, frameShadow == Sunken, lw, mlw);
        }
        break;
    }

#ifdef QT_KEYPAD_NAVIGATION
    if (QApplication::keypadNavigationEnabled() && hasFocus()) {
        QStyleOptionFocusRect fopt;
        fopt.init(this);
        fopt.state |= QStyle::State_KeyboardFocusChange;
        fopt.rect = frameRect();
        style()->drawPrimitive(QStyle::PE_FrameFocusRect, &fopt, p, this);
    }
#endif
}

/*!
  \brief Draw the button label
  \sa The Qt Manual on QPushButton
*/
void QwtArrowButton::drawButtonLabel(QPainter *p)
{
    const bool isVertical = d_data->arrowType == Qt::UpArrow ||
        d_data->arrowType == Qt::DownArrow;

    const QRect r = labelRect();
    QSize boundingSize = labelRect().size();
    if ( isVertical )
        boundingSize.transpose();
        
    const int w = 
        (boundingSize.width() - (MaxNum - 1) * Spacing) / MaxNum;

    QSize arrow = arrowSize(Qt::RightArrow, 
        QSize(w, boundingSize.height()));

    if ( isVertical )
        arrow.transpose();

    QRect contentsSize; // aligned rect where to paint all arrows
    if ( d_data->arrowType == Qt::LeftArrow || d_data->arrowType == Qt::RightArrow )
    {
        contentsSize.setWidth(d_data->num * arrow.width() 
            + (d_data->num - 1) * Spacing);
        contentsSize.setHeight(arrow.height());
    }
    else
    {
        contentsSize.setWidth(arrow.width());
        contentsSize.setHeight(d_data->num * arrow.height() 
            + (d_data->num - 1) * Spacing);
    }

    QRect arrowRect(contentsSize);
    arrowRect.moveCenter(r.center());
    arrowRect.setSize(arrow);

    p->save();
    for (int i = 0; i < d_data->num; i++)
    {
        drawArrow(p, arrowRect, d_data->arrowType);

        int dx = 0;
        int dy = 0;

        if ( isVertical )
            dy = arrow.height() + Spacing;
        else
            dx = arrow.width() + Spacing;

#if QT_VERSION >= 0x040000
        arrowRect.translate(dx, dy);
#else
        arrowRect.moveBy(dx, dy);
#endif
    }
    p->restore();

    if ( hasFocus() )
    {
#if QT_VERSION >= 0x040000
        QStyleOptionFocusRect option;
        option.init(this);
        option.backgroundColor = palette().color(QPalette::Background);

        style()->drawPrimitive(QStyle::PE_FrameFocusRect, 
            &option, p, this);
#else
        const QRect focusRect =  
            style().subRect(QStyle::SR_PushButtonFocusRect, this);
        style().drawPrimitive(QStyle::PE_FocusRect, p,
            focusRect, colorGroup());
#endif
    }
}