qt画图实验报告

今年以来我们在上级党组织的领导和区精神文明办的关心支持指导下坚持以邓小平理论和三个代表重要思想为指导认真落实科学发展观qt画图实验报告篇一：QT综合作业实验报告一、 实验目的1， 了解并掌握Qt集成开发环境下使用Qt Designer开发图形界面程序的流程和相关操作；2， 了解并掌握Qt的信号槽和信号传递机制，并通过具体应用加深理解；3， 了解并掌握使Qt应用程序支持中文或国际化的方法，并在本次实验中使用； 4， 了解并掌握QPainter的translate、shear等库函数的使用方法和Widget类的使用方法，并通过本次实验加深理解；5， 掌握在Qt Designer界面上为菜单项添加工具栏按钮、创建相应槽函数的方法； 6， 了解并掌握使用双缓冲机制绘图的方法。二、 实验环境操作系统：Windows 7应用软件：Qt Creator开发平台：qt-sdk-win-opensource-XX.04三、 程序流程图:四、 核心源代码mainwindow.cpp的内容（实现菜单项的功能和绘图功能的调用）#include mainwindow.h#include ui_mainwindow.h#include donewdialog.h#include#include#include#include aboutdialog.hMainWindow:MainWindow(QWidget *parent) :QMainWindow(parent),ui(new Ui:MainWindow)ui-setupUi(this);setWindowTitle(tr(Qt绘图板);setFixedSize(700,500); /主窗口大小设为700*500area = new PaintArea;scrollArea = new QScrollArea;scrollArea-setBackgroundRole(QPalette:Dark); /scrollArea对象的背景色设为Dark scrollArea-setWidget(area); /将画布添加到scrollArea中scrollArea-widget()-setMinimumSize(800,600); /scrollArea初始化大小设为800*600ui-dockWidget-hide();setCentralWidget(scrollArea); /将scrollArea加入到主窗口的中心区isSaved = false;curFile = tr(未命名.png);creatColorComboBox(ui-penColorComboBox); /画笔颜色组合框creatColorComboBox(ui-brushColorComboBox); /填充颜色组合框MainWindow:MainWindow()delete ui;void MainWindow:changeEvent(QEvent *e)QMainWindow:changeEvent(e);switch (e-type() case QEvent:LanguageChange:ui-retranslateUi(this);break;default:break;void MainWindow:doOpen()if (maybeSave()QString fileName = QFileDialog:getOpenFileName(this,tr(打开文件), QDir:currentPath();if (!fileName.isEmpty()area-openImage(fileName);scrollArea-widget()-resize(area-getImageSize();/获得图片的大小，然后更改scrollArea的大小isSaved = true;curFile = fileName;void MainWindow:doNew()if(maybeSave()DoNewDialog dlg;if(dlg.exec() = QDialog:Accepted)int width = dlg.getWidth();int height = dlg.getHeight();area-setImageSize(width,height);scrollArea-widget()-resize(width,height);area-setImageColor(dlg.getBackColor();isSaved = false;bool MainWindow:maybeSave()if(area-isModified()QMessageBox:StandardButton box;box = QMessageBox:warning(this,tr(保存文件),tr(图片已经改变，是否保存？), QMessageBox:Yes|QMessageBox:No|QMessageBox:Cancel);if(box = QMessageBox:Yes)return doFileSave();else if(box = QMessageBox:Cancel)return false;return true;bool MainWindow:doFileSave()if(isSaved)return saveFile(curFile);else return doFileSaveAs();bool MainWindow:saveFile(QString fileName)if(area-saveImage(fileName,png)篇二：C+实验报告-QT PaintPad 面向对象程序设计与C+实验报告 报告创建时间：篇三：QT实验五QT绘图基础实验QT绘图基础实验（一）编程绘图实现显示时钟窗口使用定时器和QPAINTER类绘制时钟，包括使用刷子、画笔、定义坐标旋转、刻度定义、画线等函数，完成时钟实时显示。定义一个GUI工程，包含下列文件：源文件analogclock.h代码#includeclass AnalogClock : public QWidgetQ_OBJECTpublic:AnalogClock(QWidget *parent = 0);protected:void paintEvent(QPaintEvent *event); 源文件main.cpp代码 #include#include analogclock.hint main(int argc, char *argv)QApplication a(argc, argv);AnalogClock clock;clock.show();return a.exec(); 源文件AnalogClock.cpp代码 #include#include analogclock.hAnalogClock:AnalogClock(QWidget *parent): QWidget(parent)QTimer *timer = new QTimer(this);connect(timer, SIGNAL(timeout(), this, SLOT(update();timer-start(1000);setWindowTitle(tr(Analog Clock);resize(200, 200);void AnalogClock:paintEvent(QPaintEvent *)static const QPoint hourHand3 = QPoint(7, 8),QPoint(-7, 8),QPoint(0, -40);static const QPoint minuteHand3 = QPoint(7, 8),QPoint(-7, 8),QPoint(0, -70);QColor hourColor(127, 0, 127);QColor minuteColor(0, 127, 127);int side = qMin(width(), height();QTime time = QTime:currentTime();QPainter painter(this);painter.setRenderHint(QPainter:Antialiasing);painter.translate(width() / 2, height() / 2);painter.scale(side / 200.0, side / 200.0);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();painter.setPen(hourColor);for (int i = 0; i painter.drawLine(88, 0, 96, 0);painter.rotate(30.0);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);painter.save();for (int j = 0; j if (j % 5) != 0)painter.drawLine(92, 0, 96, 0);painter.rotate(6.0);painter.restore();运行后的效果如下：思考：如何添加代码实现秒指针的显示？painter.setPen(QColor(0,55,223);painter.rotate(6.0 * time.second();painter.drawLine(0,0,0,-90); （二）画棋程序 使用画图事件处理鼠标绘制点击过程，使用了画笔、刷子、画线、画圆及坐标计算等方法，完成下棋程序。定义一个GUI工程，包含下列文件：（基类是QWidget类）源文件widget.cpp代码#include widget.h#include ui_widget.h#includeWidget:Widget(QWidget *parent) :QWidget(parent),ui(new Ui:Widget)ui-setupUi(this);struct CHESSstruct CHESS *next;int x; /横坐标int y; /纵坐标int color; /颜色 *cur= (CHESS *)malloc(sizeof(CHESS),*p,*q=cur; int count=0;Widget:Widget()delete ui;void Widget:paintEvent(QPaintEvent *event)QPainter painter(this);int c;painter.setBrush(QBrush(Qt:yellow,Qt:SolidPattern);/将笔刷设置成黄颜色painter.drawRect(0, 0, 256, 256);/调用矩形函数画背景painter.setPen(QPen(Qt:black,1);/设置画笔为黑色，宽度是1 for(int i = 1; i painter.drawLine(16,16* (i), 240, 16 * (i);painter.drawLine(16* (i), 16, 16 * (i), 240);painter.drawEllipse(16*4-3, 16*4-3, 6, 6);/利用画圆函数带入相应参数painter.drawEllipse(240-16*3-3, 240-16*3-3, 6, 6);painter.drawEllipse(16*4-3, 240-16*3-3, 6, 6);painter.drawEllipse(240-16*3-3, 16*4-3, 6, 6);painter.drawEllipse(16*8-3, 16*8-3, 6, 6);p=cur-next;c=count;while (count!=0)if(p-color=0)painter.setBrush(QBrush(Qt:black,Qt:SolidPattern);/设置黑色的笔刷painter.setPen(Qt:black);/设置黑色的画笔elsepainter.setBrush(QBrush(Qt:white,Qt:SolidPattern);/设置白色的笔刷painter.setPen(Qt:white);/设置白色的画笔painter.drawEllipse(16 *p-x- 3, 16 *p-y- 3, 6, 6);/带入棋子的大小参数，和坐标点p=p-next;count-;count=c;void Widget:mousePressEvent(QMouseEvent