自学教程：C++ GetArea函数代码示例

QString MythUIText::cutDown(const QString &data, MythFontProperties *font,                            bool multiline){    int length = data.length();    if (length == 0)        return data;    int maxwidth = GetArea().width();    int maxheight = GetArea().height();    int justification = Qt::AlignLeft | Qt::TextWordWrap;    QFontMetrics fm(font->face());    int margin = length - 1;    int index = 0;    int diff = 0;    while (margin > 0)    {        if (multiline)            diff = maxheight - fm.boundingRect(0, 0, maxwidth, maxheight,                                               justification,                                               data.left(index + margin + 1)                                               ).height();        else            diff = maxwidth - fm.width(data, index + margin + 1);        if (diff >= 0)            index += margin;        margin /= 2;        if (index + margin >= length - 1)            margin = (length - 1) - index;    }    if (index < length - 1)    {        QString tmpStr(data);        tmpStr.truncate(index);        if (index >= 3)            tmpStr.replace(index - 3, 3, "...");        return tmpStr;    }    return data;}

/** /brief Return the first MythUIType at the given coordinates * *  /param p QPoint coordinates *  /param recursive Whether to perform a recursive search *  /param focusable Only consider widgets that are focusable. * *  /return The widget at these coordinates */MythUIType *MythUIType::GetChildAt(const QPoint &p, bool recursive,                                   bool focusable) const{    if (GetArea().contains(p))    {        if (!IsVisible() || !IsEnabled())            return nullptr;        if (m_ChildrenList.isEmpty())            return nullptr;        /* check all children */        QList<MythUIType *>::const_iterator it;        for (it = m_ChildrenList.end() - 1; it != m_ChildrenList.begin() - 1; --it)        {            if (!(*it))                continue;            // If this point doesn't fall within the child's area then move on            // This requires that the area is actually accurate and in some            // cases this still isn't true            if (!(*it)->GetArea().contains(p - GetArea().topLeft()))                continue;            MythUIType *child = *it;            if (recursive && (focusable && !child->CanTakeFocus()))                child = child->GetChildAt(p - GetArea().topLeft(), recursive,                                          focusable);            if (child)            {                // NOTE: Assumes no selectible ui type will contain another                // selectible ui type.                if (focusable && !child->CanTakeFocus())                    continue;                return child;            }        }    }    return nullptr;}

void InfoItem::Draw(HDC hDC,ePipeline* Pipe /*=Pipe*/){    RECT rc = GetArea();	COLORREF Oldcr = ::SetTextColor(hDC,RGB(0,255,0));	::DrawText(hDC,m_Text.c_str(),m_Text.size(),&rc,DT_LEFT|DT_EXPANDTABS|			DT_NOPREFIX|DT_VCENTER);		::SetTextColor(hDC,Oldcr);	}

std::string CTriangle::ToString() const{	std::stringstream stream;	stream << "Triangle <<" << m_firstVertex.GetX() << "," << m_firstVertex.GetY() << ">";	stream << "<" << m_secondVertex.GetX() << "," << m_secondVertex.GetY() << ">";	stream << "<" << m_thirdVertex.GetX() << "," << m_thirdVertex.GetY() << ">>";	stream << ", Perimeter=" << GetPerimeter() << ", Area=" << GetArea();	return stream.str();}

string CIncomingFriendList :: GetDescription( ){	string Description;	Description += GetAccount( ) + "/n";	Description += ExtractStatus( GetStatus( ) ) + "/n";	Description += ExtractArea( GetArea( ) ) + "/n";	Description += ExtractLocation( GetLocation( ) ) + "/n/n";	return Description;}

/** /brief Return the first MythUIType which accepts focus found at the given *         coordinates * *  /param p QPoint coordinates *  /param recursive Whether to perform a recursive search * *  /return The widget at these coordinates */MythUIType *MythUIType::GetChildAt(const QPoint &p, bool recursive,                                   bool focusable) const{    if (GetArea().contains(p))    {        if (!IsVisible() || !IsEnabled())            return NULL;        if (m_ChildrenList.isEmpty())            return NULL;        /* check all children */        QList<MythUIType *>::const_iterator it;        for (it = m_ChildrenList.end() - 1; it != m_ChildrenList.begin() - 1; --it)        {            if (!(*it))                continue;            MythUIType *child = NULL;            if ((*it)->GetArea().contains(p - GetArea().topLeft()))                child = *it;            if (!child && recursive)                child = (*it)->GetChildAt(p - GetArea().topLeft(), recursive,                                          focusable);            if (child)            {                // NOTE: Assumes no selectible ui type will contain another                // selectible ui type.                if (focusable && !child->CanTakeFocus())                    continue;                return child;            }        }    }    return NULL;}

void MythUISimpleText::DrawSelf(MythPainter *p, int xoffset, int yoffset,                                int alphaMod, QRect clipRect){    QRect area = GetArea().toQRect();    area.translate(xoffset, yoffset);    int alpha = CalcAlpha(alphaMod);    p->SetClipRect(clipRect);    p->DrawText(area, m_Message, m_Justification, m_Font, alpha, area);}

void CMemoryView::CTitle::Draw(HDC hDC,ePipeline* Pipe ){	//输出文字    RECT rc = GetArea();		COLORREF Oldcr = ::SetTextColor(hDC,RGB(0,0,0));	tstring s = Format1024(_T("%s		(%3d) "),m_Text.c_str(),m_ChildList.size());	::DrawText(hDC,s.c_str(),s.size(),&rc,DT_LEFT|DT_EXPANDTABS|		DT_NOPREFIX|DT_VCENTER);		::SetTextColor(hDC,Oldcr);	}

void Damage::DrawAreas () {    BoxObj visible(0, 0, _canvas->Width() - 1, _canvas->Height() - 1);    BoxObj b, *a;    Iterator i;    for (FirstArea(i); !Done(i); Next(i)) {        a = GetArea(i);        b = *a - visible;	_output->ClearRect(_canvas, b._left, b._bottom, b._right, b._top);	_graphic->DrawClipped(_canvas, b._left, b._bottom, b._right, b._top);    }}    

void MythUIScrollBar::CalculatePosition(void){    if (m_maximum > 0)        Show();    else    {        Hide();        return;    }    MythUIType *slider = GetChild("slider");    if (!slider)    {        LOG(VB_GENERAL, LOG_ERR, "Slider element doesn't exist");        return;    }    float percentage = (float)m_sliderPosition / m_maximum;    float relativeSize = (float)m_pageStep / (m_maximum + m_pageStep);    MythRect newSliderArea = slider->GetArea();    MythRect fillArea = GetArea();    QPoint endPos(newSliderArea.left(), newSliderArea.top());    if (m_layout == LayoutHorizontal)    {        int width = qMax((int)(fillArea.width() * relativeSize + 0.5),                         m_sliderArea.width());        newSliderArea.setWidth(width);        endPos.setX((int)((fillArea.width() - width) * percentage + 0.5));    }    else    {        int height = qMax((int)(fillArea.height() * relativeSize + 0.5),                          m_sliderArea.height());        newSliderArea.setHeight(height);        endPos.setY((int)((fillArea.height() - height) * percentage + 0.5));    }    slider->SetArea(newSliderArea);    slider->SetPosition(endPos);    if (m_hideDelay > 0)    {        if (m_timerId)            killTimer(m_timerId);        m_timerId = startTimer(m_hideDelay);        AdjustAlpha(1, 10, 0, 255);    }}

void CLogicView::CRefItem::Draw(HDC hDC, ePipeline* Pipe){	FillRect(hDC,GetArea(),SS.crTaskMassBk);	if(m_State & SPACE_FOCUSED){		DrawEdge(hDC,GetArea(),RGB(192,192,255));	}		COLORREF crOld = SetTextColor(hDC,SS.crBrainViewItemText);		RECT rc = GetArea();	rc.right  = rc.left + 80;	rc.bottom = rc.top  + 18;	rc.left +=2;		//被引用名	::DrawText(hDC,m_RefName.c_str(),m_RefName.size(),&rc,DT_END_ELLIPSIS|DT_LEFT|DT_SINGLELINE|DT_VCENTER);		//引用者名	rc.left = rc.right; rc.right +=100 ;	::DrawText(hDC,m_WhoRef.c_str(),m_WhoRef.size(),&rc,DT_END_ELLIPSIS|DT_LEFT|DT_SINGLELINE|DT_VCENTER);			SetTextColor(hDC,crOld);};

void CGFrameArea::Update (void)//	Update////	Update the area	{	for (int i = 0; i < GetAreaCount(); i++)		{		AGArea *pArea = GetArea(i);		pArea->Update();		}	}

std::string CCircle::ToString() const{	std::stringstream ss;	ss << std::fixed << std::setprecision(2) << "circle <" << 		m_center.GetPosition().first << ", " << 		m_center.GetPosition().second << ">, R = " << 		GetRadius() << ", S = " << 		GetArea() << ", P = " << 		GetPerimeter() << ", " << 		m_outlineColor << ", " << 		m_fillColor;	return ss.str();}

void CBaseJungle::Init(){	//---------------------------------------------------------------------------	//初期化	//---------------------------------------------------------------------------	SetFadeIn();	Sint32 col1 =  0xF0408080;	Sint32 col2 =  0xF0808040;	pGame->pBg->SetSkyColor(50,col1,col2);	viiSub::SetScroll_l( GetTargetPlayer()->x , GetTargetPlayer()->y );	//---------------------------------------------------------------------------	//ファイル初期化	//---------------------------------------------------------------------------//	LoadTexture( enTexPageSoldier , "HoundData//enemychara//common//ene_soldier.bmp",0xff00ff00);//	UploadTexture();	//---------------------------------------------------------------------------	//エリア初期化	//---------------------------------------------------------------------------	switch(GetArea( )){	case enAreaSeq01:		LoadConfig( "HoundData//[email
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