#include "drawboard.h"

#include <QMouseEvent>
#include <QPainter>

drawboard::drawboard(QWidget *parent) : QWidget(parent)
{
    map = new QPixmap(800,600);
    map->fill();
    basemap = new QPixmap(800,600);
    basemap->fill();

}

void drawboard::paintEvent(QPaintEvent *event)
{
    QPainter p(this);
    p.drawPixmap(QPoint(0,0),*map);
}

void drawboard::mousePressEvent(QMouseEvent *event)
{
    *basemap = *map;
    start = event->pos();
}

void drawboard::mouseMoveEvent(QMouseEvent *event)
{
    if(penstyle != "曲线") {
        *map = *basemap;
    }

    end = event->pos();
    QPainter p(map);
    QPen pen;
    pen.setWidth(penwidth);
    pen.setColor(pencolor);
    p.setPen(pen);

    if(penstyle == "直线") {
        p.drawLine(start,end);
    } else if(penstyle == "曲线") {
        p.drawLine(start,end);
        start = end;
    } else if(penstyle == "矩形") {
        p.drawRect(QRect(start,end));
    } else if(penstyle == "椭圆") {
        p.drawEllipse(QRect(start,end));
    }

    update();
}