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  • searchdemo 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#26061
    01 #include <QtCore>
    02 #include <QtGui>
    03 #include "widget.h"
    04
    05 int main(int argc, char* argv[])
    06 {
    07     QApplication app(argc, argv);
    08
    09     MyWidget* test = new MyWidget;
    10     QRect frect = test->frameGeometry();
    11     frect.moveCenter(QDesktopWidget().availableGeometry().center());
    12     test->move(frect.topLeft());
    13     test->show();
    14
    15     QMessageBox::warning(test, QObject::tr("drawtest"),
    16                          QString::number(test->x()) +
    17                          "," +
    18                          QString::number(test->y()));
    19
    20     return app.exec();
    21 }

    widgit.h

    C++语言: Codee#26062
    01 #ifndef MY_WIDGET
    02 #define MY_WIDGET
    03 #include <QtGui>
    04 #include <QtCore>
    05
    06 class MyWidget: public QWidget
    07 {
    08 public:
    09     MyWidget(QWidget* parent = 0);
    10     void paintEvent(QPaintEvent* event);
    11 };
    12
    13 #endif

    widget.cpp:

    C++语言: Codee#26063
    01 #include "widget.h"
    02
    03 MyWidget::MyWidget(QWidget* parent)
    04     : QWidget(parent)
    05 {
    06     setAttribute(Qt::WA_StaticContents);
    07     setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Minimum);
    08     this->resize(910, 700);
    09 }
    10
    11 void MyWidget::paintEvent(QPaintEvent* event)
    12 {
    13     QPainter painter(this);
    14
    15     painter.setPen(QPen(Qt::black));
    16     painter.setFont(QFont("Arial", 30));
    17     painter.drawText(rect(), Qt::AlignCenter, "Hello Qt!");
    18
    19     for (int i = 0; i < 910; i += 35)
    20         painter.drawLine(i, 0,
    21                          i, 700);
    22     for (int j = 0; j <= 700; j += 35)
    23         painter.drawLine(0,  j,
    24                          910, j);
    25 }
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  • 原文地址:https://www.cnblogs.com/invisible/p/2448323.html
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