search-demo 一.绘制方格

先熟悉一下界面的绘制，下一步对node类进行细化。

效果图：

main.cpp
C++语言: Codee#2606101#include

02#include

03#include "widget.h"

04

05intmain(intargc,charargv[])

06{

07QApplicationapp(argc,argv);

08

09MyWidgettest=newMyWidget;

10QRectfrect=test->frameGeometry();

11frect.moveCenter(QDesktopWidget().availableGeometry().center());

12test->move(frect.topLeft());

13test->show();

14

15QMessageBox::warning(test,QObject::tr("drawtest"),

16QString::number(test->x())+

17","+

18QString::number(test->y()));

19

20returnapp.exec();

21}

widgit.h
C++语言: Codee#2606201#ifndef MY_WIDGET

02#define MY_WIDGET

03#include

04#include

05

06classMyWidget:publicQWidget

07{

08public:

09MyWidget(QWidgetparent=0);

10voidpaintEvent(QPaintEventevent);

11};

12

13#endif

widget.cpp:
C++语言: Codee#2606301#include "widget.h"

02

03MyWidget::MyWidget(QWidgetparent)

04:QWidget(parent)

05{

06setAttribute(Qt::WA_StaticContents);

07setSizePolicy(QSizePolicy::Minimum,QSizePolicy::Minimum);

08this->resize(910,700);

09}

10

11voidMyWidget::paintEvent(QPaintEventevent)

12{

13QPainterpainter(this);

14

15painter.setPen(QPen(Qt::black));

16painter.setFont(QFont("Arial",30));

17painter.drawText(rect(),Qt::AlignCenter,"Hello Qt!");

18

19for(inti=0;i<910;i+=35)

20painter.drawLine(i,0,

21i,700);

22for(intj=0;j<=700;j+=35)

23painter.drawLine(0,j,

24910,j);

25}原文链接: https://www.cnblogs.com/invisible/archive/2012/04/15/2448323.html

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