ViewSplitter.cpp

// Author: Kang Lin <kl222@126.com>
 
#include "ViewSplitter.h"
#include <QVBoxLayout>
#include <QLoggingCategory>
#include <QEvent>
#include <QTimer>
#include "ViewSplitterContainer.h"
 
static Q_LOGGING_CATEGORY(log, "App.View.Splitter")
 
CViewSplitter::CViewSplitter(CParameterApp *pPara, QWidget *parent)
    : CView(pPara, parent)
    , m_nRow(0)
    , m_nCount(0)
    , m_nIdxRow(-1)
    , m_nIdxCol(-1)
{
    qDebug(log) << Q_FUNC_INFO << this;
 
    QVBoxLayout* p = new QVBoxLayout(this);
    if(!p) {
        qCritical(log) << "new QVBoxLayout fail";
        return;
    }
    p->setContentsMargins(0, 0, 0, 0);
    setLayout(p);
    m_pMain = new QSplitter(Qt::Vertical, this);
    if(!m_pMain) {
        m_pMain->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
        qCritical(log) << "m_pMain is nullptr";
        return;
    }
    p->addWidget(m_pMain);
    m_HandleWidth = m_pMain->handleWidth();
    /*
    setStyleSheet("QWidget { background-color: red }");
    m_pMain->setStyleSheet("QSplitter::handle { background-color: white }");//*/
}
 
CViewSplitter::~CViewSplitter()
{
    qDebug(log) << Q_FUNC_INFO << this;
    for(int i = 0; i < m_nRow; i++)
    {
        auto sp = m_Row[i];
        for(int j = 0; j < sp->count(); j++)
        {
            auto pw = sp->widget(j);
            pw->setParent(nullptr);
        }
    }
}
 
int CViewSplitter::AddView(QWidget *pView)
{
    int nRet = 0;
    QSplitter* sp = nullptr;
    if(!pView) {
        qCritical(log) << "The view is null";
        Q_ASSERT(pView);
        return -1;
    }
 
    //TODO: 增加检查 pView 是否已存在?
 
    // 是否需要新增加一行
    if(m_nCount + 1 > m_nRow * m_nRow) {
        QSplitter* p = new QSplitter(Qt::Horizontal, m_pMain);
        if(p) {
            p->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
            //p->setStyleSheet("QSplitter::handle { background-color: blue }");
            m_Row.append(p);
            m_nRow++;
        }
    }
    // 顺序查找哪行没满，加到未尾
    int i = 0;
    for(i = 0; i < m_nRow; i++) {
        auto p = m_Row[i];
        if(p->count() < m_nRow) {
            sp = p;
            break;
        }
    }
    if(!sp)
        return nRet;
 
    auto pContainer = new CViewSplitterContainer(pView, m_pParameterApp);
    if(pContainer) {
        // 设置当前视频索引
        m_nIdxRow = i;
        m_nIdxCol = sp->count();
        sp->addWidget(pContainer);
        pContainer->SetVisibleTab(m_pParameterApp->GetTabBar());
        pContainer->show();
        m_Container.insert(pView, pContainer);
        ActiveContainer(pView);
        bool check = connect(
            pContainer,
            SIGNAL(customContextMenuRequested(const QPoint&)),
            this, SIGNAL(customContextMenuRequested(const QPoint&)));
        Q_ASSERT(check);
        check = connect(pContainer, &CViewSplitterContainer::sigFouceIn,
                        this, [&](QWidget* pView){
                            SetCurrentView(pView);
                        });
        if(m_pParameterApp)
        {
            check = connect(m_pParameterApp, SIGNAL(sigTabPositionChanged()),
                            pContainer, SLOT(slotTabPositionChanged()));
            Q_ASSERT(check);
            check = connect(pContainer, SIGNAL(sigCloseView(const QWidget*)),
                            this, SIGNAL(sigCloseView(const QWidget*)));
            Q_ASSERT(check);
        }
        m_nCount++;
    } else
        return -1;
 
    SetSizes();
 
    qDebug(log) << Q_FUNC_INFO << "Row:" << m_nRow << m_pMain->count() << "Count:" << m_nCount
                << "Current row:" << m_nIdxRow << "Current col:" << m_nIdxCol
                << "Current count:" << sp->count();
    emit sigCurrentChanged(pView);
    return nRet;
}
 
int CViewSplitter::RemoveView(QWidget *pView)
{
    int nRet = 0;
    if(!pView)
        return -1;
 
    // Get view position
    int nRow = -1;
    int nCol = -1;
    nRet = GetIndex(pView, nRow, nCol);
    if(nRet)
        return nRet;
 
    CViewSplitterContainer* pContainerNext = nullptr;
    QWidget* pCurView = GetCurrentView();   
    if(pView == pCurView)
    {
        // Get next
        if(m_Row[nRow]->count() > nCol + 1)
            pContainerNext = GetContainer(nRow, nCol + 1);
        else if(m_Row[nRow]->count() - 1 == nCol && 0 != nCol)
            pContainerNext = GetContainer(nRow, nCol -1);
        else if(0 == nCol && nRow + 1 < m_nRow) {
            for(int i = nRow + 1; i < m_nRow; i++) {
                if(m_Row[i]->count() > 0) {
                    pContainerNext = GetContainer(nRow + 1, 0);
                    break;
                }
            }
        }
        if(!pContainerNext) {
            for(int i = nRow - 1; i >= 0; i--) {
                if(m_Row[i]->count() > 0) {
                    pContainerNext = GetContainer(i, m_Row[i]->count() - 1);
                    break;
                }
            }
        }
    }
 
    // Delete view
    pView->setParent(nullptr);
    auto pContainer = GetContainer(pView);
    if(pContainer) {
        // Remove from QSplitter
        pContainer->setParent(nullptr);
        m_Container.remove(pView);
        delete pContainer;
    }
    qDebug(log) << "Row:" << nRow << "remain:" << m_Row[nRow]->count();
    m_nCount--;
 
    qDebug(log) << "Row:" << m_nRow << "Count:" << m_nCount
                << "Current row:" << m_nIdxRow << "Current col:" << m_nIdxCol;
 
    if(pContainerNext) {
        pCurView = pContainerNext->GetView();
        // When full screen
        if(pContainerNext->isHidden())
            pContainerNext->show();
    }
    if(pCurView)
        pCurView->setFocus();
 
    return SetCurrentView(pCurView);
}
 
QWidget *CViewSplitter::GetCurrentView()
{
    auto p = GetContainer(m_nIdxRow, m_nIdxCol);
    if(p)
        return p->GetView();
    return nullptr;
}
 
int CViewSplitter::SetCurrentView(QWidget *pView)
{
    int nRet = 0;
    if(!pView)
        return -1;
    int nRow = -1;
    int nCol = -1;
    nRet = GetIndex(pView, nRow, nCol);
    if(nRet) return nRet;
 
    if(m_nIdxCol == nCol && m_nIdxRow == nRow)
        return 0;
 
    m_nIdxRow = nRow;
    m_nIdxCol = nCol;
    pView->setFocus();
    ActiveContainer(pView);
    emit sigCurrentChanged(pView);
 
    return nRet;
}
 
void CViewSplitter::SetWidowsTitle(
    QWidget *pView, const QString &szTitle,
    const QIcon &icon, const QString &szToolTip)
{
    if(!pView)
        return;
    auto pContainer = GetContainer(pView);
    if(!pContainer)
        return;
    pContainer->setWindowTitle(szTitle);
    if(m_pParameterApp->GetEnableTabIcon())
        pContainer->setWindowIcon(icon);
    else
        pContainer->setWindowIcon(QIcon());
    if(m_pParameterApp->GetEnableTabToolTip())
        pContainer->SetPrompt(szToolTip);
    else
        pContainer->SetPrompt(QString());
    
    SetSizes();
}
 
int CViewSplitter::SetFullScreen(bool bFull)
{
    int nRet = 0;
    if(0 >= m_nCount) return 0;
 
    if(m_pParameterApp && m_pParameterApp->GetKeepSplitViewWhenFullScreen())
        return 0;
 
    QWidget* p = GetCurrentView();
    qDebug(log) << "CurrentView:" << p;
    if(!p) return 0;
    if(bFull) {
        m_szStyleSheet = styleSheet();
        //qDebug(log) << "Style:" << m_szStyleSheet;
        setStyleSheet("QWidget::pane{top:0px;left:0px;border:none;}");
        m_HandleWidth = m_pMain->handleWidth();
        m_pMain->setHandleWidth(0);
        for(int i = 0; i < m_nRow; i++) {
            auto sp = m_Row[i];
            if(!sp) {
                qCritical(log) << "Row" << i << "is null";
                continue;
            }
            sp->setHandleWidth(0);
            for(int j = 0; j < m_nRow; j++) {
                if(m_nIdxRow == i && m_nIdxCol == j) {
                    ActiveContainer(nullptr);
                    SetVisibleTab(false);
                    continue;
                }
                auto p = sp->widget(j);
                if(p) {
                    p->hide();
                } else {
                    qCritical(log) << "Widget: Row" << i << "Col" << j << "is null";
                }
            }
        }
    }
    else {
        setStyleSheet(m_szStyleSheet);
        m_pMain->setHandleWidth(m_HandleWidth);
        for(int i = 0; i < m_nRow; i++) {
            auto sp = m_Row[i];
            sp->setHandleWidth(m_HandleWidth);
            if(!sp) continue;
            for(int j = 0; j < m_nRow; j++) {
                auto p = sp->widget(j);
                if(p) {
                    SetVisibleTab(m_pParameterApp->GetTabBar());
                    p->show();
                    if(m_nIdxRow == i && m_nIdxCol == j) {
                        CViewSplitterContainer* pView = qobject_cast<CViewSplitterContainer*>(p);
                        if(pView)
                            ActiveContainer(pView->GetView());
                    }
                }
            }
        }
    }
    return nRet;
}
 
int CViewSplitter::SetVisibleTab(bool bVisible)
{
    foreach (auto c, m_Container) {
        if(c)
            c->SetVisibleTab(bVisible);
    }
    SetSizes();
    return 0;
}
 
int CViewSplitter::GetIndex(QWidget* pView, int &nRow, int &nCol)
{
    if(!pView)
        return -1;
 
    nCol = -1;
    
    auto pContainer = m_Container[pView];
    for(nRow = 0; nRow < m_nRow; nRow++)
    {
        auto sp = m_Row[nRow];
        if(!sp) continue;
        nCol = sp->indexOf(pContainer);
        if(-1 < nCol)
            return 0;
    }
 
    return -1;
}
 
CViewSplitterContainer* CViewSplitter::GetContainer(const int &nRow, const int &nCol)
{
    QWidget* pContainer = nullptr;
    QSplitter* sp = nullptr;
    if(-1 < nRow && nRow < m_nRow)
        sp = m_Row[nRow];
    if(sp && -1 < nCol && nCol < sp->count())
        pContainer = sp->widget(nCol);
    qDebug(log) << "Container" << "Row number:" << m_nRow << m_Row.size()
                << "Count:" << m_nCount
                << "row:" << m_nIdxRow << "col:" << m_nIdxCol;
    return qobject_cast<CViewSplitterContainer*>(pContainer);
}
 
CViewSplitterContainer* CViewSplitter::GetContainer(QWidget *pView)
{
    auto it = m_Container.find(pView);
    if(m_Container.end() == it)
        return nullptr;
    return *it;
}
 
int CViewSplitter::ActiveContainer(QWidget *pView)
{
    foreach (auto c, m_Container) {
        if(!c) continue;
        if(c->GetView() == pView && nullptr != pView) {
            c->setFrameStyle(QFrame::Panel|QFrame::Raised);
            c->setLineWidth(5);
            c->setMidLineWidth(5);
        } else {
            c->setFrameStyle(QFrame::NoFrame);
            c->setLineWidth(0);
            c->setMidLineWidth(0);
        }
    }
    return 0;
}
 
int CViewSplitter::SetSizes()
{
    int w = 0, h = 0;
    if(0 == m_nCount)
        return 0;
    foreach(auto sp, m_Row) {
        for(int i = 0; i < sp->count(); i++) {
            auto pContainer = sp->widget(i);
            w = qMax(w, pContainer->frameGeometry().width());
            h = qMax(h, pContainer->frameGeometry().height());
        }
    }
 
    qDebug(log) << "Width:" << w << "Height:" << h;
 
    QList<int> wSizes, hSizes;
    foreach(auto sp, m_Row) {
        wSizes.clear();
        for(int i = 0; i < sp->count(); i++) {
            wSizes.push_back(w);
        }
        sp->setSizes(wSizes);
        qDebug(log) << "wSizes:" << wSizes << sp->sizes();
        hSizes.push_back(h);
    }
    m_pMain->setSizes(hSizes);
    qDebug(log) << "hSizes:" << hSizes << m_pMain->sizes();
 
    return 0;
}