电子商务网站开发概述,去哪里注册商标和品牌,php网站开发需要学哪些,淘宝网手机版1.Ubuntu Qt 配置交叉编译环境
1.1 ubuntu 20.04安装Qt
sudo apt-get install qtcreator
1.2 配置QT GCC配置同上 最后配置Kits 上面设置完成之后 #xff0c;设置Kits 中的Device(这是为了能够直接把项目部署到arm设备上) 点击NEXT之后会出现连接被拒绝#xff0c;不用担…1.Ubuntu Qt 配置交叉编译环境
1.1 ubuntu 20.04安装Qt
sudo apt-get install qtcreator
1.2 配置QT GCC配置同上 最后配置Kits 上面设置完成之后 设置Kits 中的Device(这是为了能够直接把项目部署到arm设备上) 点击NEXT之后会出现连接被拒绝不用担心 下面会对其设置密码。
验证arm设置的密码。 1.3 创建Qt项目 代码
此代码是抄的别人的具体是哪位博主的忘记了。如果该博主看到了 请下我我会把连接附上
main.cpp
#include widget.h
#include QApplicationint main(int argc, char *argv[])
{QApplication a(argc, argv);Widget w;w.show();return a.exec();
}widget.cpp
#include widget.h
#includeQPainter
#includeQTimer
#includeQTime
#includeQString
#includeQVector
#includeQMap
#define CLOCK_RADIUS (80) //时钟的半径#define PANEL_RADIUS_NUM (3) //表盘的3个圆#define PANEL_RADIUS1 CLOCK_RADIUS //圆1的半径#define PANEL_RADIUS2 (CLOCK_RADIUS - 6) //圆2的半径#define PANEL_RADIUS3 (CLOCK_RADIUS - 8) //圆3的半径#define HOUR_NUM_SIZE (10) //小时数字的字体大小//3个表针的形状三角形static QPoint hourHand[3] {QPoint(5, 3),QPoint(-5, 3),QPoint(0, -30)
};static QPoint minuteHand[3] {QPoint(4, 6),QPoint(-4, 6),QPoint(0, -45)
};static QPoint secondHand[3] {QPoint(2, 10),QPoint(-2, 10),QPoint(0, -60)
};//表针与刻度颜色static QColor hourColor(255, 0, 0);static QColor minuteColor(0, 0, 255);static QColor secondColor(0, 255, 0);//表盘参数struct panelPara{int radius;QColor color;
};
//圆的半径与对于的颜色static panelPara stPanelParaArr[] {{PANEL_RADIUS1, QColor(255, 200, 100)},{PANEL_RADIUS2, QColor(164, 211, 238)},{PANEL_RADIUS3, QColor(255, 255, 255)},
};Widget::Widget(QWidget *parent): QWidget(parent)
{QTimer *timer new QTimer(this);connect(timer, SIGNAL(timeout()), this, SLOT(update()));timer-start(1000);setWindowTitle(tr(Clock));setMinimumSize(200, 200); //设置最小尺寸}Widget::~Widget()
{
}void Widget::paintEvent(QPaintEvent *event)
{int side qMin(width(), height());QTime time QTime::currentTime();QPainter painter(this);painter.setRenderHint(QPainter::Antialiasing);painter.translate(width()/2, height()/2); //画图的基准位置painter.scale(side/200.0, side/200.0); //随窗口尺寸自动缩放//表盘for (int i0; iPANEL_RADIUS_NUM; i){QBrush brush(stPanelParaArr[i].color);QPen pen(stPanelParaArr[i].color);painter.setBrush(brush);painter.setPen(pen);painter.drawEllipse(-stPanelParaArr[i].radius, -stPanelParaArr[i].radius, 2*stPanelParaArr[i].radius, 2*stPanelParaArr[i].radius);}//小时的表针painter.setPen(Qt::NoPen);painter.setBrush(hourColor);painter.save();painter.rotate(30.0 * ((time.hour() time.minute() / 60.0)));painter.drawConvexPolygon(hourHand, 3);painter.restore();//小时的刻度painter.setPen(hourColor);for (int i 0; i 12; i)
{painter.rotate(30.0);painter.drawLine(PANEL_RADIUS3-6, 0, PANEL_RADIUS3, 0);QFont font(TimesNewRoman, HOUR_NUM_SIZE);painter.setFont(font);painter.drawText(-HOUR_NUM_SIZE, -(CLOCK_RADIUS-15), 2*HOUR_NUM_SIZE, 2*HOUR_NUM_SIZE, Qt::AlignHCenter, QString::number(i1));}//分钟的表针painter.setPen(Qt::NoPen);painter.setBrush(minuteColor);painter.save();painter.rotate(6.0 * (time.minute() time.second() / 60.0));painter.drawConvexPolygon(minuteHand, 3);painter.restore();painter.setPen(minuteColor);for (int j 0; j 60; j){if ((j % 5) ! 0){painter.drawLine(PANEL_RADIUS3-4, 0, PANEL_RADIUS3, 0);}painter.rotate(6.0);}//秒钟的表针painter.setPen(Qt::NoPen);painter.setBrush(secondColor);painter.save();painter.rotate(6.0 * time.second());painter.drawConvexPolygon(secondHand, 3);painter.restore();painter.end();
}widget.h
#ifndef WIDGET_H
#define WIDGET_H
#include QWidgetclass Widget : public QWidget{Q_OBJECTpublic:Widget(QWidget *parent nullptr);~Widget();void paintEvent(QPaintEvent *event);
};#endif // WIDGET_H
配置 clock.pro ,在pro文件添加下面代码。
#要部署的到ARM设备上的目录target.path/opt/arm #安装目标文件INSTALLStarget
先对项目进行编译再把项目发布到 arm设备。 上面项目部署之后登陆arm设备进到对应的目录下查看代码。 查看生成的文件 格式 为arm aarch 64 正是arm 设备运行的文件 。 执行命令运行程序如下
nvidiaubuntu:/opt/clock/bin$ ./clock 2.windows下使用visual studio或qt进行
arm linux程序开发环境搭建
2.1 创建项目 widget.cpp
#include widget.h
#include ui_widget.h
#includeQPainter
#pragma execution_character_set(utf-8)Widget::Widget(QWidget *parent) :QWidget(parent),ui(new Ui::Widget)
{ui-setupUi(this);connect(timer, SIGNAL(timeout()), this, SLOT(timeout_slot()));connect(timer, SIGNAL(timeout()), this, SLOT(update()));connect(ui-Btn_Reset, SIGNAL(clicked()), this, SLOT(update()));time.setHMS(0,0,0,0);ui-Txt_ShowTime-setText(00:00:00);ui-Btn_Start-setChecked(false);ui-Btn_Reset-setEnabled(false);ui-Btn_Hit-setEnabled(false);
}
Widget::~Widget()
{delete ui;
}
void Widget::timeout_slot()
{//qDebug(hello);QTime nowTime QTime::currentTime();time time.addMSecs(lastTime.msecsTo(nowTime));lastTime nowTime;ui-Txt_ShowTime-setText(time.toString(mm:ss.zzz));
}
void Widget::on_Btn_Start_toggled(bool checked)
{if (checked){timer.start(ADD_TIME_MSEC);lastTime QTime::currentTime();//记录时间戳ui-Btn_Start-setText(暂停);ui-Btn_Reset-setEnabled(false);ui-Btn_Hit-setEnabled(true);}else{timer.stop();ui-Btn_Start-setText(继续);ui-Btn_Reset-setEnabled(true);ui-Btn_Hit-setEnabled(false);}
}
void Widget::on_Btn_Reset_clicked()
{m_iHitCnt 0;timer.stop();time.setHMS(0,0,0,0);ui-Txt_ShowTime-setText(00:00:00);ui-Txt_ShowItem-clear();ui-Btn_Start-setText(开始);ui-Btn_Start-setChecked(false);ui-Btn_Reset-setEnabled(false);ui-Btn_Hit-setEnabled(false);
}
void Widget::on_Btn_Hit_clicked()
{QString temp;m_iHitCnt;temp.sprintf(--计次 %d--, m_iHitCnt);ui-Txt_ShowItem-setFontPointSize(9);ui-Txt_ShowItem-append(temp);ui-Txt_ShowItem-setFontPointSize(12);ui-Txt_ShowItem-append(time.toString([mm:ss.zzz]));
}
//------------------#define CLOCK_RADIUS (90) //时钟的半径#define PANEL_RADIUS_NUM (3) //表盘的3个圆#define PANEL_RADIUS1 CLOCK_RADIUS //圆1的半径#define PANEL_RADIUS2 (CLOCK_RADIUS - 6) //圆2的半径#define PANEL_RADIUS3 (CLOCK_RADIUS - 8) //圆3的半径#define PANEL_RADIUS4 (40) //内圆的半径#define SEC_NUM_SIZE (10) //小时数字的字体大小#define MIN_NUM_SIZE (7) //分钟数字的字体大小//3个表针的形状三角形static QPoint minuteHand[3] {
QPoint(2, 6),QPoint(-2, 6),QPoint(0, -45)
};
static QPoint secondHand[3] {QPoint(2, 8),QPoint(-2, 8),QPoint(0, -85)
};
//表针与刻度颜色static QColor secondColor(0, 0, 255);
static QColor minuteColor(0, 0, 0);
//表盘参数struct panelPara{int radius;QColor color;
};
//圆的半径与对于的颜色static panelPara stPanelParaArr[] {{PANEL_RADIUS1, QColor(255, 200, 100)},{PANEL_RADIUS2, QColor(164, 211, 238)},{PANEL_RADIUS3, QColor(255, 255, 255)},
};
void Widget::paintEvent(QPaintEvent *event)
{int side qMin(width(), height());//QTime time QTime::currentTime();QPainter painter(this);painter.setRenderHint(QPainter::Antialiasing);painter.translate(width()/3, height()*2/5); //画图的基准位置painter.scale(side/300.0, side/300.0); //随窗口尺寸自动缩放//表盘(3个同心圆)for (int i0; iPANEL_RADIUS_NUM; i){QBrush brush(stPanelParaArr[i].color);QPen pen(stPanelParaArr[i].color);painter.setBrush(brush);painter.setPen(pen);painter.drawEllipse(-stPanelParaArr[i].radius, -stPanelParaArr[i].radius, 2*stPanelParaArr[i].radius, 2*stPanelParaArr[i].radius);}//秒的刻度painter.setPen(secondColor);for (int i 0; i 60; i){if ((i % 5) 0){painter.drawLine(PANEL_RADIUS3-8, 0, PANEL_RADIUS3, 0);QFont font(TimesNewRoman, SEC_NUM_SIZE);painter.setFont(font);painter.drawText(-SEC_NUM_SIZE, -(CLOCK_RADIUS-15), 2*SEC_NUM_SIZE, 2*SEC_NUM_SIZE, Qt::AlignHCenter, QString::number(i0? 60 : i));
}else{painter.drawLine(PANEL_RADIUS3-5, 0, PANEL_RADIUS3, 0);}//秒再细分5个格for (int j 0; j 5; j){painter.rotate(6.0/5);if (j ! 4){painter.drawLine(PANEL_RADIUS3-2, 0, PANEL_RADIUS3, 0);}}}//分钟的刻度painter.setPen(minuteColor);for (int k 0; k 30; k){if ((k % 5) 0){painter.rotate(-90.0);painter.drawLine(PANEL_RADIUS4-8, 0, PANEL_RADIUS4, 0);painter.rotate(90.0);QFont font(TimesNewRoman, MIN_NUM_SIZE);painter.setFont(font);painter.drawText(-MIN_NUM_SIZE, -(PANEL_RADIUS4-10), 2*MIN_NUM_SIZE, 2*MIN_NUM_SIZE, Qt::AlignHCenter, QString::number(k0? 30 : k));}else{painter.rotate(-90.0);painter.drawLine(PANEL_RADIUS4-4, 0, PANEL_RADIUS4, 0);painter.rotate(90.0);}painter.rotate(12.0);}//分钟的表针painter.setPen(Qt::NoPen);painter.setBrush(minuteColor);painter.save();painter.rotate(12.0 * (time.minute() time.second() / 60.0));painter.drawConvexPolygon(minuteHand, 3);painter.restore();//秒钟的表针painter.setPen(Qt::NoPen);painter.setBrush(secondColor);painter.save();//painter.rotate(6.0 * time.second());painter.rotate(6.0 * (time.second()time.msec()/1000.0));painter.drawConvexPolygon(secondHand, 3);painter.restore();painter.end();
}
widget.h
#ifndef WIDGET_H
#define WIDGET_H
#include QWidget
#include QTimer
#include QTime
#include QDebug
#define ADD_TIME_MSEC 30namespace Ui {
class Widget;
}
class Widget : public QWidget
{Q_OBJECT
public:explicit Widget(QWidget *parent nullptr);~Widget();void paintEvent(QPaintEvent *event);QTimer timer;QTime time;QTime lastTime;
private slots:void on_Btn_Start_toggled(bool checked);void timeout_slot();void on_Btn_Reset_clicked();void on_Btn_Hit_clicked();
private:Ui::Widget *ui;int m_iHitCnt 0;
};#endif // WIDGET_H
main.cpp
#include widget.h
#include QApplicationint main(int argc, char *argv[])
{QApplication a(argc, argv);Widget w;w.show();return a.exec();
} 2.2 运行项目 2.3把文件移动到Linux下
在win下编译通过之后把文件 main.cpp timer.pro widget.cpp widget.h widget.ui 移动到
Linux 下 用编译源码生成的 qmake(前面2. Linux Server 20.04 Qt5.14.2配置Jetson Orin Nano Developer Kit 交叉编译环境 生成的qmake) 进行对 timer.pro 文件进行编译
/opt/Qt5JetsonOrinNano/sysroot/usr/local/Qt5JetsonOrinNano/bin/qmake timer.pro之后会生成 Makefile 文件
再执行 make 命令 生成 .o 文件 输入命令 file timer 查看生成的 timer 文件 类型 把文件拷贝到 arm 设备
scp ./timer nvidia192.168.20.230:/home/nvidia/Downloads/test/time sudo vim /etc/profile#加入下面5行代码 export QT_DEBUG_PLUGINS1export QTDIR/usr/local/Qt5JetsonOrinNano#编译的源码export LD_LIBRARY_PATH/usr/local/Qt5JetsonOrinNano/lib:$LD_LIBRARY_PATHexport QT_QPA_PLATFORM_PLUGIN_PATH$QTDIR/pluginsexport QT_QPA_PLATFORMxcb#编译源码时加入的显示模块 -xcbsudo source /etc/profile
