qt写的波形显示和分析控件

#include "MyQlabel.h" #include <qimage.h> #include <qpixmap.h> MyWaveBox::MyWaveBox( QWidget* parent,const char* name) :QWidget(parent) { int x=0; back_pix=new QPixmap(); QPainter pix(back_pix); for(x=0;x<300;x+=5) { pix.drawLine(x,0,x,300); pix.drawLine(0,x,300,x); } } void MyWaveBox::enterEvent(QEvent *e) { } void MyWaveBox::leaveEvent(QEvent *e) { } void MyWaveBox::send_in(int x1,int y1,int x2,int y2) { QPainter painter(this); pix.drawLine((300-x1),y1,(300-x2),y2); } void MyWaveBox::P_update() { repaint(FALSE); } MyWaveBox::~MyWaveBox() { } void MyWaveBox::paintEvent(QPaintEvent *event) { QPainter painter(this); painter.drawPixmap(0,0,*back_pix); }