46 lines
881 B
C++
46 lines
881 B
C++
|
#include "widget.h"
|
|||
|
|
#include "ui_widget.h"
|
|||
|
|
#include "qpainter.h"
|
|||
|
|
#include "qevent.h"
|
|||
|
|
#include "qdebug.h"
|
|||
|
|
|
|||
|
|
Widget::Widget(QWidget *parent) : QWidget(parent), ui(new Ui::Widget)
|
|||
|
|
{
|
|||
|
|
ui->setupUi(this);
|
|||
|
|
this->setMouseTracking(true);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
Widget::~Widget()
|
|||
|
|
{
|
|||
|
|
delete ui;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
void Widget::mouseMoveEvent(QMouseEvent *event)
|
|||
|
|
{
|
|||
|
|
lastPos = event->pos();
|
|||
|
|
update();
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
void Widget::mouseReleaseEvent(QMouseEvent *event)
|
|||
|
|
{
|
|||
|
|
//这里是鼠标按下的坐标,自己存到数据库
|
|||
|
|
lastPos = event->pos();
|
|||
|
|
update();
|
|||
|
|
qDebug() << lastPos;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
void Widget::paintEvent(QPaintEvent *)
|
|||
|
|
{
|
|||
|
|
QPainter painter(this);
|
|||
|
|
|
|||
|
|
QPen pen;
|
|||
|
|
pen.setWidth(5);
|
|||
|
|
pen.setColor(Qt::red);
|
|||
|
|
painter.setPen(pen);
|
|||
|
|
|
|||
|
|
//绘制横向线
|
|||
|
|
painter.drawLine(0, lastPos.y(), width(), lastPos.y());
|
|||
|
|
//绘制纵向线
|
|||
|
|
painter.drawLine(lastPos.x(), 0, lastPos.x(), height());
|
|||
|
|
}
|