Qt5利用自绘实现遥感

.pro

 1 QT       += core gui
 2 
 3 greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
 4 
 5 CONFIG += c++11
 6 
 7 # The following define makes your compiler emit warnings if you use
 8 # any Qt feature that has been marked deprecated (the exact warnings
 9 # depend on your compiler). Please consult the documentation of the
10 # deprecated API in order to know how to port your code away from it.
11 DEFINES += QT_DEPRECATED_WARNINGS
12 
13 # You can also make your code fail to compile if it uses deprecated APIs.
14 # In order to do so, uncomment the following line.
15 # You can also select to disable deprecated APIs only up to a certain version of Qt.
16 #DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
17 
18 SOURCES += \
19     main.cpp \
20     mainwindow.cpp
21 
22 HEADERS += \
23     mainwindow.h
24 
25 FORMS += \
26     mainwindow.ui
27 
28 # Default rules for deployment.
29 qnx: target.path = /tmp/$${TARGET}/bin
30 else: unix:!android: target.path = /opt/$${TARGET}/bin
31 !isEmpty(target.path): INSTALLS += target
32 
33 RESOURCES += \
34     QQQQQ.qrc
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 main.cpp

 1 #include "mainwindow.h"
 2 
 3 #include <QApplication>
 4 
 5 int main(int argc, char *argv[])
 6 {
 7     QApplication a(argc, argv);
 8     MainWindow w;
 9     w.show();
10     return a.exec();
11 }
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mainwindow.h

 1 #ifndef MAINWINDOW_H
 2 #define MAINWINDOW_H
 3 
 4 #include <QMainWindow>
 5 #include <QPainter>
 6 #include <QTimer>
 7 
 8 QT_BEGIN_NAMESPACE
 9 namespace Ui { class MainWindow; }
10 QT_END_NAMESPACE
11 
12 class MainWindow : public QMainWindow
13 {
14     Q_OBJECT
15 
16 public:
17     MainWindow(QWidget *parent = nullptr);
18     ~MainWindow();
19     virtual void paintEvent(QPaintEvent *event);
20 
21 private slots:
22     void updatePaint();
23     void on_pushButton_clicked();
24 
25     void on_pushButton_2_clicked();
26 
27     void on_pushButton_3_clicked();
28 
29     void on_pushButton_4_clicked();
30 
31     void on_pushButton_5_clicked();
32 
33     void on_pushButton_6_clicked();
34 
35     void on_pushButton_7_clicked();
36 
37     void on_pushButton_8_clicked();
38 
39 private:
40     Ui::MainWindow *ui;
41     int m_nRotationAngle;
42     int m_x = 0;
43     int m_y = 0;
44     int m_x2 = 0;
45     int m_y2 = 0;
46 
47 };
48 #endif // MAINWINDOW_H
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mainwindow.cpp

  1 #include "mainwindow.h"
  2 #include "ui_mainwindow.h"
  3 
  4 MainWindow::MainWindow(QWidget *parent)
  5     : QMainWindow(parent)
  6     , ui(new Ui::MainWindow)
  7 {
  8     ui->setupUi(this);
  9 
 10     // 利用定时器，定时变换角度，进行旋转。
 11     QTimer *pTimer = new QTimer(this);
 12     pTimer->setInterval(100);
 13     connect(pTimer, SIGNAL(timeout()), this, SLOT(updatePaint()));
 14     pTimer->start();
 15 
 16     m_x = this->width() >> 1;
 17     m_y = this->height() >> 1;
 18 
 19     m_x2 = 0;
 20     m_y2 = 0;
 21 
 22 }
 23 
 24 MainWindow::~MainWindow()
 25 {
 26     delete ui;
 27 }
 28 
 29 void gradientArc(QPainter *painter, int radius, int startAngle, int angleLength, int arcHeight, QRgb color)
 30 {
 31     // 渐变色
 32 //    QRadialGradient gradient(0, 0, radius);
 33 //    gradient.setColorAt(0, Qt::white);
 34 //    gradient.setColorAt(1.0, color);
 35 //    painter->setBrush(gradient);
 36 
 37     QBrush gradient2(color);
 38     painter->setBrush(gradient2);
 39 
 40     // << 1（左移1位）相当于radius*2 即：150*2=300
 41     //QRectF(-150, -150, 300, 300)
 42     QRectF rect(-radius, -radius, radius << 1, radius << 1);
 43     QPainterPath path;
 44     path.arcTo(rect, startAngle, angleLength);
 45 
 46     painter->setPen(Qt::NoPen);
 47     painter->drawPath(path);
 48 
 49 //    // 渐变色
 50 //       QRadialGradient gradient(0, 0, radius);
 51 //       gradient.setColorAt(0, Qt::white);
 52 //       gradient.setColorAt(1.0, color);
 53 //       painter->setBrush(gradient);
 54 
 55 //       // << 1（左移1位）相当于radius*2 即：150*2=300
 56 //       //QRectF(-150, -150, 300, 300)
 57 //       QRectF rect(-radius, -radius, radius << 1, radius << 1);
 58 //       QPainterPath path;
 59 //       path.arcTo(rect, startAngle, angleLength);
 60 
 61 //       // QRectF(-120, -120, 240, 240)
 62 //       QPainterPath subPath;
 63 //       subPath.addEllipse(rect.adjusted(arcHeight, arcHeight, -arcHeight, -arcHeight));
 64 
 65 //       // path为扇形 subPath为椭圆
 66 //       path -= subPath;
 67 
 68 //       QFont font;
 69 //       font.setFamily("Microsoft YaHei");
 70 //       font.setPointSize(14);
 71 
 72 //       painter->setPen(Qt::NoPen);
 73 //       path.addText(path.pointAtPercent(0.5), font, QStringLiteral("一去丶二三里"));
 74 //       painter->drawPath(path);
 75 }
 76 
 77 void gradientArc2(QPainter *painter, int radius, int startAngle, int angleLength, int arcHeight, QColor color)
 78 {
 79     QBrush gradient2(color);
 80     painter->setBrush(gradient2);
 81 
 82     QRectF rect(-radius, -radius, radius << 1, radius << 1);
 83     QPainterPath path;
 84     path.arcTo(rect, startAngle, angleLength);
 85 
 86     painter->setPen(Qt::NoPen);
 87     painter->drawPath(path);
 88 }
 89 
 90 void gradientArc3(QPainter *painter, int radius, int startAngle, int angleLength, int arcHeight, QColor color)
 91 {
 92     QBrush gradient2(color);
 93     painter->setBrush(gradient2);
 94 
 95     QRectF rect(-radius, -radius, radius << 1, radius << 1);
 96     QPainterPath path;
 97     path.arcTo(rect, startAngle, angleLength);
 98 
 99     painter->setPen(Qt::NoPen);
100     painter->drawPath(path);
101 }
102 
103 void MainWindow::paintEvent(QPaintEvent *event)
104 {
105 //    QPainter painter(this);
106 //       painter.setBrush(Qt::yellow);
107 //       painter.drawRect(0,0,50,50);
108 
109 //      painter.translate(100,100); //将点（100，100）设为原点
110 
111 //       painter.setBrush(Qt::red);
112 //       painter.drawRect(0,0,50,50);
113 
114 //      painter.translate(-100,-100);
115 
116 //       painter.drawLine(0,0,20,20);
117 
118     QPainter painter(this);
119     painter.setRenderHint(QPainter::Antialiasing, true);
120 //    int radius = 150;
121 //    int arcHeight = 30;
122     int radius = 200;
123     int arcHeight = 100;
124     // >> 1（右移1位）相当于width() / 2
125 //    painter.translate(width() >> 1, height() >> 1);
126     painter.translate(m_x, m_y);
127 //    painter.translate(m_x2, m_y2);
128 //    painter.rotate(m_nRotationAngle);
129     /**
130     * 参数二：半径
131     * 参数三：开始的角度
132     * 参数四：指扫取的角度-顺时针（360度 / 8 = 45度）
133     * 参数五：圆环的高度
134     * 参数六：填充色
135     **/
136 
137     gradientArc2(&painter, radius, 0, 360, arcHeight,  QColor(255, 0, 0, 100));
138     painter.translate(m_x2, m_y2);
139     gradientArc3(&painter, 10, 0, 360, arcHeight,  QColor(0, 255, 0, 100));
140 //    gradientArc(&painter, radius, 0,  45, arcHeight, qRgb(200, 200, 0));
141 //    gradientArc(&painter, radius, 45, 45, arcHeight, qRgb(200, 0, 200));
142 //    gradientArc(&painter, radius, 90, 45, arcHeight, qRgb(0, 200, 200));
143 //    gradientArc(&painter, radius, 135, 45, arcHeight, qRgb(200, 0, 0));
144 //    gradientArc(&painter, radius, 225, 45, arcHeight, qRgb(0, 200, 0));
145 //    gradientArc(&painter, radius, 180, 45, arcHeight, qRgb(0, 0, 200));
146 //    gradientArc(&painter, radius, 270, 45, arcHeight, qRgb(0, 0, 0));
147 //    gradientArc(&painter, radius, 315, 45, arcHeight, qRgb(150, 150, 150));
148 }
149 
150 void MainWindow::updatePaint()
151 {
152     m_nRotationAngle = m_nRotationAngle + 10;
153    if (m_nRotationAngle > 360)
154        m_nRotationAngle = 0;
155    update();
156 }
157 
158 
159 void MainWindow::on_pushButton_clicked()
160 {
161     m_x = m_x - 2;
162     update();
163 }
164 
165 void MainWindow::on_pushButton_2_clicked()
166 {
167     m_x = m_x + 2;
168     update();
169 }
170 
171 void MainWindow::on_pushButton_3_clicked()
172 {
173     m_y = m_y - 2;
174     update();
175 }
176 
177 void MainWindow::on_pushButton_4_clicked()
178 {
179     m_y = m_y + 2;
180     update();
181 }
182 
183 void MainWindow::on_pushButton_5_clicked()
184 {
185     m_x2 = m_x2 - 2;
186     update();
187 }
188 
189 void MainWindow::on_pushButton_6_clicked()
190 {
191     m_x2 = m_x2 + 2;
192     update();
193 }
194 
195 void MainWindow::on_pushButton_7_clicked()
196 {
197     m_y2 = m_y2 - 2;
198     update();
199 }
200 
201 void MainWindow::on_pushButton_8_clicked()
202 {
203     m_y2 = m_y2 + 2;
204     update();
205 }
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mainwindow.ui

  1 <?xml version="1.0" encoding="UTF-8"?>
  2 <ui version="4.0">
  3  <class>MainWindow</class>
  4  <widget class="QMainWindow" name="MainWindow">
  5   <property name="geometry">
  6    <rect>
  7     <x>0</x>
  8     <y>0</y>
  9     <width>800</width>
 10     <height>600</height>
 11    </rect>
 12   </property>
 13   <property name="windowTitle">
 14    <string>MainWindow</string>
 15   </property>
 16   <widget class="QWidget" name="centralwidget">
 17    <widget class="QPushButton" name="pushButton">
 18     <property name="geometry">
 19      <rect>
 20       <x>70</x>
 21       <y>330</y>
 22       <width>75</width>
 23       <height>23</height>
 24      </rect>
 25     </property>
 26     <property name="text">
 27      <string>PushButton</string>
 28     </property>
 29    </widget>
 30    <widget class="QPushButton" name="pushButton_2">
 31     <property name="geometry">
 32      <rect>
 33       <x>210</x>
 34       <y>330</y>
 35       <width>75</width>
 36       <height>23</height>
 37      </rect>
 38     </property>
 39     <property name="text">
 40      <string>PushButton</string>
 41     </property>
 42    </widget>
 43    <widget class="QPushButton" name="pushButton_3">
 44     <property name="geometry">
 45      <rect>
 46       <x>150</x>
 47       <y>290</y>
 48       <width>75</width>
 49       <height>23</height>
 50      </rect>
 51     </property>
 52     <property name="text">
 53      <string>PushButton</string>
 54     </property>
 55    </widget>
 56    <widget class="QPushButton" name="pushButton_4">
 57     <property name="geometry">
 58      <rect>
 59       <x>150</x>
 60       <y>370</y>
 61       <width>75</width>
 62       <height>23</height>
 63      </rect>
 64     </property>
 65     <property name="text">
 66      <string>PushButton</string>
 67     </property>
 68    </widget>
 69    <widget class="QPushButton" name="pushButton_5">
 70     <property name="geometry">
 71      <rect>
 72       <x>390</x>
 73       <y>330</y>
 74       <width>75</width>
 75       <height>23</height>
 76      </rect>
 77     </property>
 78     <property name="text">
 79      <string>PushButton</string>
 80     </property>
 81    </widget>
 82    <widget class="QPushButton" name="pushButton_6">
 83     <property name="geometry">
 84      <rect>
 85       <x>520</x>
 86       <y>330</y>
 87       <width>75</width>
 88       <height>23</height>
 89      </rect>
 90     </property>
 91     <property name="text">
 92      <string>PushButton</string>
 93     </property>
 94    </widget>
 95    <widget class="QPushButton" name="pushButton_7">
 96     <property name="geometry">
 97      <rect>
 98       <x>450</x>
 99       <y>290</y>
100       <width>75</width>
101       <height>23</height>
102      </rect>
103     </property>
104     <property name="text">
105      <string>PushButton</string>
106     </property>
107    </widget>
108    <widget class="QPushButton" name="pushButton_8">
109     <property name="geometry">
110      <rect>
111       <x>450</x>
112       <y>370</y>
113       <width>75</width>
114       <height>23</height>
115      </rect>
116     </property>
117     <property name="text">
118      <string>PushButton</string>
119     </property>
120    </widget>
121   </widget>
122   <widget class="QMenuBar" name="menubar">
123    <property name="geometry">
124     <rect>
125      <x>0</x>
126      <y>0</y>
127      <width>800</width>
128      <height>23</height>
129     </rect>
130    </property>
131   </widget>
132   <widget class="QStatusBar" name="statusbar"/>
133  </widget>
134  <resources/>
135  <connections/>
136 </ui>
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.qrc

不再上传

 

posted on 2021-04-13 16:39  疯狂delphi  阅读(114)  评论(0)  编辑  收藏  举报

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