itemdelegate.cpp

#include "global.h"
#include "itemdelegate.h"

#include <QComboBox>
#include <QListView>
#include <QDoubleSpinBox>
#include <QStandardItemModel>
#include <QApplication>
#include <QMouseEvent>

ItemDelegate::ItemDelegate(QObject *parent) : QStyledItemDelegate(parent)
{
    
}

ItemDelegate::~ItemDelegate()
{
    
}

QRect ItemDelegate::CheckBoxRect(const QStyleOptionViewItem &viewItemStyleOptions) const  
{
    QStyleOptionButton checkBoxStyleOption;
    QRect checkBoxRect=QApplication::style()->subElementRect(QStyle::SE_CheckBoxIndicator,&checkBoxStyleOption);
    QPoint checkBoxPoint(viewItemStyleOptions.rect.x()+viewItemStyleOptions.rect.width()/2-checkBoxRect.width()/2,
                         viewItemStyleOptions.rect.y()+viewItemStyleOptions.rect.height()/2-checkBoxRect.height()/2);
    return QRect(checkBoxPoint, checkBoxRect.size());
}  

void ItemDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
{
    if (index.row()!=4&&index.row()!=5) QStyledItemDelegate::paint(painter,option,index);
    else
    {
        int checked=index.model()->data(index,Qt::DisplayRole).toInt();
        QStyleOptionButton*checkBoxOption=new QStyleOptionButton();
        if (checked!=2) checkBoxOption->state|=QStyle::State_Enabled;
        if (checked) checkBoxOption->state|=QStyle::State_On; else checkBoxOption->state|=QStyle::State_Off;
        checkBoxOption->rect=CheckBoxRect(option);
        QApplication::style()->drawControl(QStyle::CE_CheckBox,checkBoxOption,painter);
    }
}

bool ItemDelegate::editorEvent(QEvent *event,QAbstractItemModel *model, const QStyleOptionViewItem &option, const QModelIndex &index)
{
    if (index.row()!=4&&index.row()!=5) return QStyledItemDelegate::editorEvent(event,model,option,index);
    if ((event->type()==QEvent::MouseButtonRelease)||(event->type()==QEvent::MouseButtonDblClick))
    {
        QMouseEvent*mouse_event=static_cast<QMouseEvent*>(event);
        if (mouse_event->button()!=Qt::LeftButton||!CheckBoxRect(option).contains(mouse_event->pos())) return false;
        if (event->type()==QEvent::MouseButtonDblClick) return true;
    }
    else if (event->type()==QEvent::KeyPress)
    {
        QKeyEvent*key_event=static_cast<QKeyEvent*>(event);
        if (key_event->key()!=Qt::Key_Space&&key_event->key()!=Qt::Key_Select) return false;
    }
    else return false;
    
    int checked=index.model()->data(index,Qt::DisplayRole).toInt();
    return model->setData(index,checked<=1?!checked:true,Qt::DisplayRole);
}

QWidget *ItemDelegate::createEditor(QWidget *parent, const QStyleOptionViewItem &, const QModelIndex &index) const
{
    if (index.row()==0) //Type
    {
        QComboBox*editor=new QComboBox(parent);
        QListView*view=new QListView(parent);
        QStandardItemModel*model=new QStandardItemModel(parent);
        
        QStandardItem*item;
        item=new QStandardItem("传统型");
        item->setToolTip("传统型");
        model->appendRow(item);
        item=new QStandardItem("提交答案型");
        item->setToolTip("提交答案型");
        model->appendRow(item);
        
        editor->setView(view);
        editor->setModel(model);
        
        return editor;
    }
    else if (index.row()==1) //Time Limit
    {
        QDoubleSpinBox*editor=new QDoubleSpinBox(parent);
        editor->setAlignment(Qt::AlignCenter);
        //editor->setDecimals(1);
        editor->setMinimum(0);
        editor->setMaximum(3600);
        return editor;
    }
    else if (index.row()==2) //Memory Limit
    {
        QDoubleSpinBox*editor=new QDoubleSpinBox(parent);
        editor->setAlignment(Qt::AlignCenter);
        //editor->setDecimals(1);
        editor->setMinimum(0);
        editor->setMaximum(8192);
        editor->setSingleStep(128);
        return editor;
    }
    else if (index.row()==3) //Comparer
    {
        QComboBox*editor=new QComboBox(parent);
        QListView*view=new QListView(parent);
        QStandardItemModel*model=new QStandardItemModel(parent);
        
        QStandardItem*item;
        item=new QStandardItem("全文比较");
        item->setToolTip("全文比较(过滤行末空格及文末回车)");
        model->appendRow(item);
        
        QString dir1=QDir().currentPath()+"/checker",dir2=Global::dataPath+problemList[index.column()];
        QStringList list1,list2;
#ifdef Q_OS_LINUX
        list1=QDir(dir1).entryList(QDir::Files|QDir::Executable);
        list2=QDir(dir2).entryList(QDir::Files|QDir::Executable);
#else
        list1=QDir(dir1).entryList(QDir::Files);
        list2=QDir(dir2).entryList(QDir::Files);
#endif
        for (auto i:list1)
        {
#ifdef Q_OS_WIN
            if (!i.endsWith(".exe")) continue;
#endif
            if (i=="fulltext"||i=="fulltext.exe") continue;
            item=new QStandardItem(i);
            item->setToolTip(QString("%1 (位置: %2)").arg(i,dir1));
            model->appendRow(item);
        }
        for (auto i:list2)
        {
#ifdef Q_OS_WIN
            if (!i.endsWith(".exe")) continue;
#endif
            if (i=="fulltext"||i=="fulltext.exe") continue;
            item=new QStandardItem(i);
            item->setToolTip(QString("%1 (位置: %2)").arg(i,dir2));
            model->appendRow(item);
        }
        
        editor->setView(view);
        editor->setModel(model);
        
        return editor;
    }
    else if (index.row()==6) // Stack Size
    {
        QSpinBox*editor=new QSpinBox(parent);
        editor->setAlignment(Qt::AlignCenter);
        editor->setMinimum(-1);
        editor->setMaximum(2147483647);
        editor->setSingleStep(1048576);
        return editor;
    }
    else return NULL;
}

void ItemDelegate::setEditorData(QWidget *editor, const QModelIndex &index) const
{
    if (index.row()==0) //Type
    {
        QComboBox*edit=static_cast<QComboBox*>(editor);
        int p=edit->findText(index.model()->data(index,Qt::EditRole).toString());
        if (p==-1) p=0;
        edit->setCurrentIndex(p);
        return;
    }   
    else if (index.row()==1) //Time Limit
    {
        QDoubleSpinBox*edit=static_cast<QDoubleSpinBox*>(editor);
        bool ok;
        edit->setValue(index.model()->data(index,Qt::EditRole).toDouble(&ok));
        if (!ok) edit->setValue(1);
        return;
    }
    else if (index.row()==2) //Memory Limit
    {
        QDoubleSpinBox*edit=static_cast<QDoubleSpinBox*>(editor);
        bool ok;
        edit->setValue(index.model()->data(index,Qt::EditRole).toDouble(&ok));
        if (!ok) edit->setValue(128);
        return;
    }    
    else if (index.row()==3) //Comparer
    {
        QComboBox*edit=static_cast<QComboBox*>(editor);
        int p=edit->findText(index.model()->data(index,Qt::EditRole).toString());
        if (p==-1) p=0;
        edit->setCurrentIndex(p);
        return;
    }
    else if (index.row()==6) //Stack Size
    {
        QSpinBox*edit=static_cast<QSpinBox*>(editor);
        bool ok;
        edit->setValue(index.model()->data(index,Qt::EditRole).toInt(&ok));
        if (!ok) edit->setValue(-1);
        return;
    }
}

void ItemDelegate::setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const
{
    if (index.row()==0) //Type
    {
        QComboBox*edit=static_cast<QComboBox*>(editor);
        model->setData(index,edit->currentText());
        return;
    }   
    else if (index.row()==1) //Time Limit
    {
        QDoubleSpinBox*edit=static_cast<QDoubleSpinBox*>(editor);
        model->setData(index,edit->value());
        return;
    }
    else if (index.row()==2) //Memory Limit
    {
        QDoubleSpinBox*edit=static_cast<QDoubleSpinBox*>(editor);
        model->setData(index,edit->value());
        return;
    }    
    else if (index.row()==3) //Comparer
    {
        QComboBox*edit=static_cast<QComboBox*>(editor);
        model->setData(index,edit->currentText());
        return;
    }
    else if (index.row()==6) //Stack Size
    {
        QSpinBox*edit=static_cast<QSpinBox*>(editor);
        model->setData(index,edit->value());
        return;
    }
}