cardsview.cpp

程序代码使用说明： (1)所有源代码目录下都提供了Makefile（非Qt）

#include "CardsView.h"
#include "CardsModel.h"
#include "CardsDelegate.h"

#include <QHeaderView>
#include <QMenu>
#include <QKeyEvent>
#include <QMouseEvent>
#include <QMessageBox>

CardsView::CardsView(QWidget *parent) : QTableView(parent)
{
    setFrameStyle(NoFrame);
    verticalHeader()->hide();
    horizontalHeader()->hide();
    setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
    setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
}

void CardsView::resizeEvent(QResizeEvent *e)
{
    Q_UNUSED(e);

    int cell_w = contentsRect().width() / model()->columnCount();
    int cell_h = contentsRect().height() / model()->rowCount();
    CardsDelegate::cellSize = QSize(cell_w, cell_h);

    // Calculate border polygon, 2% for border
    int x_offset = cell_w - int(cell_w * 0.98); 
    int y_offset = cell_h - int(cell_h * 0.98);

    CardsDelegate::border.setPoints(6,
    0, 0,
    cell_w, 0,
    cell_w - x_offset, y_offset,
    x_offset, y_offset,
    x_offset, cell_h - y_offset,
    0, cell_h);

    int i;
    for (i = 0; i < model()->rowCount(); ++i)
        verticalHeader()->resizeSection(i, cell_h);
    for (i = 0; i < model()->columnCount(); ++i)
        horizontalHeader()->resizeSection(i, cell_w);
}

void CardsView::keyPressEvent(QKeyEvent* e)
{
    CardsModel *pt = qobject_cast<CardsModel *>(model());
    if (!pt) 
    {
        QTableView::keyPressEvent(e);
        return;
    }
    switch ( e->key() ) 
    {
        case Qt::Key_Up: pt->moveUp(); e->accept(); break;
        case Qt::Key_Down: pt->moveDown(); e->accept(); break;
        case Qt::Key_Left:
            {
                pt->moveLeft();
                e->accept();
                break;
            }
        case Qt::Key_Right:
            {
                pt->moveRight();
                e->accept();
                break;
            }

        default:
            QTableView::keyPressEvent(e);
        return;
    }
}

void CardsView::setModel(QAbstractItemModel *m)
{
    QTableView::setModel(m);
    CardsModel *pt = qobject_cast<CardsModel *>(model());
    if (pt)
        connect(pt, SIGNAL(gameWon()), this, SLOT(announceWin()));
}


void CardsView::mousePressEvent(QMouseEvent* e)
{
    CardsModel *pt = qobject_cast<CardsModel *>(model());
    if (!pt) {
        QTableView::mousePressEvent(e);
        return;
    }

    pt->move( indexAt( QPoint( e->x(), e->y() ) ) );
}

void CardsView::announceWin()
{
    QMessageBox::information(this, 
        "Congratulations!", "You win the game!");
}