.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 BoxSelectWidget.cpp \
20 main.cpp \
21 mainwindow.cpp
22
23 HEADERS += \
24 BoxSelectWidget.h \
25 mainwindow.h
26
27 FORMS += \
28 mainwindow.ui
29
30 # Default rules for deployment.
31 qnx: target.path = /tmp/$${TARGET}/bin
32 else: unix:!android: target.path = /opt/$${TARGET}/bin
33 !isEmpty(target.path): INSTALLS += target
34
35 RESOURCES += \
36 rcs.qrc
View Code
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 }
View Code
mainwindow.h
1 #ifndef MAINWINDOW_H
2 #define MAINWINDOW_H
3
4 #include <QMainWindow>
5 #include <QTimer>
6
7 #include "BoxSelectWidget.h"
8
9 QT_BEGIN_NAMESPACE
10 namespace Ui { class MainWindow; }
11 QT_END_NAMESPACE
12
13 class MainWindow : public QMainWindow
14 {
15 Q_OBJECT
16 public:
17 MainWindow(QWidget *parent = nullptr);
18 ~MainWindow();
19
20 private:
21 void on_GetLonLat();
22
23 Ui::MainWindow *ui;
24 TBoxSelectWidget *m_Box;
25 QTimer *m_pTimer;
26 };
27
28
29 #endif // MAINWINDOW_H
View Code
mainwindow.cpp
1 #include "mainwindow.h"
2 #include "ui_mainwindow.h"
3
4 const QString C_Title = QStringLiteral("Qt之实现框选地图功能 %1 %2 %3 %4");
5
6 MainWindow::MainWindow(QWidget *parent)
7 : QMainWindow(parent)
8 , ui(new Ui::MainWindow)
9 {
10 ui->setupUi(this);
11
12 setWindowTitle(C_Title);
13 this->setFixedSize(534, 600);// 中国版图宽度970 高度1120 宽高比例8.9
14 // 中国经度范围：73°33′E至135°05′E；纬度范围：3°51′N至53°33′N。
15 // 73°33′E = 73.55
16 // 135°05′E = 135.083
17 // 3°51′N = 3.85
18 // 53°33′N = 53.55
19 m_Box = new TBoxSelectWidget(this->width(), this->height(),
20 73.55, 135.083,
21 3.85, 53.55,
22 ":/new/image/map.jpg", this);
23
24 m_pTimer = new QTimer(this);
25 m_pTimer->setSingleShot(false);
26 m_pTimer->start(100);
27 connect(m_pTimer, &QTimer::timeout, this, &MainWindow::on_GetLonLat);
28 }
29
30 MainWindow::~MainWindow()
31 {
32 delete ui;
33 }
34
35 void MainWindow::on_GetLonLat()
36 {
37 setWindowTitle(C_Title.arg(m_Box->getMinLon())
38 .arg(m_Box->getMaxLon())
39 .arg(m_Box->getMinLat())
40 .arg(m_Box->getMaxLat()));
41
42 }
View Code
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>600</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> 18 <resources/> 19 <connections/> 20 </ui>View Code
BoxSelectWidget.h
1 // 作者：朱建强 时间：2023-01-10
2 // 支持点选（鼠标左键单格点）
3 // 支持框选（左上TO右下）
4 // 支持正负框选（框选上次选中的将变为非选中）
5 // 支持模糊框选（左上TO右下、右下TO左上）
6 // 支持反选（选中TO非选中）
7 // 支持立即显示
8 #ifndef BOXSELECTWIDGET_H
9 #define BOXSELECTWIDGET_H
10
11 #include <QWidget>
12 #include <QPainter>
13 #include <QMouseEvent>
14 #include <QDebug>
15 #include <QVector>
16
17 class TBoxSelectWidget : public QWidget
18 {
19 Q_OBJECT
20 public:
21 TBoxSelectWidget(int w, int h,
22 double mapMinLon, double mapMaxLon,
23 double mapMinLat, double mapMaxLat,
24 QString mapImageFile,
25 QWidget* parent = nullptr);
26 ~TBoxSelectWidget();
27
28 double getMinLon();
29 double getMaxLon();
30 double getMinLat();
31 double getMaxLat();
32 protected:
33 virtual void paintEvent(QPaintEvent *event);
34 virtual void mousePressEvent(QMouseEvent *event);
35 virtual void mouseReleaseEvent(QMouseEvent *event);
36 virtual void mouseMoveEvent(QMouseEvent *event);
37 private:
38 void addMouseXY(int x, int y);// 增加鼠标点
39 void setArrayNull(bool value);// 数据给O
40 void getCellWidhtHeight();// 计算格子的长宽
41 void getCellLonLat();// 计算格子的经纬度
42 void drawCell(QPainter &painter);// 根据数据绘制格子
43 void drawGrid(QPainter &painter, int x, int y);// 绘制网格
44 // 计算用
45 bool getMouseXYToArrayIndex(int x, int y, int x2, int y2);
46 void getSelectLonLat();// 计算选中区域
47 // 地图经纬区域
48 double m_dMapMinLon = 0;
49 double m_dMapMaxLon = 0;
50 double m_dMapMinLat = 0;
51 double m_dMapMaxLat = 0;
52 QString m_sMapImageFile = "";
53 // 输出选中的经纬度
54 double m_dSelectMinLon = 0;
55 double m_dSelectMaxLon = 0;
56 double m_dSelectMinLat = 0;
57 double m_dSelectMaxLat = 0;
58 // 鼠标位置
59 int m_nXBeing = 0;
60 int m_nYBeing = 0;
61 int m_nX = 0;
62 int m_nY = 0;
63 // 行列变量
64 int m_nRow = 10;
65 int m_nCol = 10;
66 // 每一个格子的长与宽
67 int m_CellWidth = 0;
68 int m_CellHeight = 0;
69 // 每一个格子的经度与纬度
70 double m_CellLon = 0.0;
71 double m_CellLat = 0.0;
72 // 选中数组
73 QVector<QVector<bool>> m_Array;
74 // 框选模式
75 int m_nSelectMode = 2;// 黙认：单选、1：左上TO右下框选、2：模糊框选
76 // 多区域模式
77 int m_nMultizoneMode = 0;// 黙认：不支持多区域、1：支持多区域
78 // 选中效果立即显示
79 int m_nRealTimeShowMode = 1;// 默认：最后显示、1：立即显示
80 // 框选异形区域
81 int m_nShapeMode = 0;// 默认：不支持异形、1：支持异形
82
83 };
84
85
86 #endif // BOXSELECTWIDGET_H
View Code
BoxSelectWidget.cpp
1 #include "BoxSelectWidget.h"
2
3 TBoxSelectWidget::TBoxSelectWidget(int w, int h, double mapMinLon, double mapMaxLon, double mapMinLat, double mapMaxLat, QString mapImageFile, QWidget *parent)
4 :QWidget(parent),
5 m_dMapMinLon(mapMinLon),
6 m_dMapMaxLon(mapMaxLon),
7 m_dMapMinLat(mapMinLat),
8 m_dMapMaxLat(mapMaxLat),
9 m_sMapImageFile(mapImageFile)
10 {
11 this->setGeometry(0, 0, w, h);
12 setArrayNull(false);
13 getCellWidhtHeight(); // 计算每格长宽
14 getCellLonLat();// 计算每个格子的经度与纬度
15 }
16
17 TBoxSelectWidget::~TBoxSelectWidget()
18 {
19
20 }
21
22 double TBoxSelectWidget::getMinLon()
23 {
24 return m_dSelectMinLon;
25 }
26
27 double TBoxSelectWidget::getMaxLon()
28 {
29 return m_dSelectMaxLon;
30 }
31
32 double TBoxSelectWidget::getMinLat()
33 {
34 return m_dSelectMinLat;
35 }
36
37 double TBoxSelectWidget::getMaxLat()
38 {
39 return m_dSelectMaxLat;
40 }
41
42 void TBoxSelectWidget::paintEvent(QPaintEvent *event)
43 {
44 // 界面背景图片片
45 QPainter painter(this);
46 painter.drawPixmap(0, 0, this->width(), this->height(), QPixmap(m_sMapImageFile));
47
48 painter.setPen(Qt::red);
49 int nXBeing;
50 int nYBeing;
51 int nXEnd;
52 int nYEnd;
53
54 // 绘制行
55 for (int i = 1; i < m_nCol; ++i)
56 {
57 nXBeing = 0;
58 nYBeing = this->height() / m_nCol * i;
59 nXEnd = this->width();
60 nYEnd = nYBeing;
61
62 painter.drawLine(nXBeing, nYBeing, nXEnd, nYEnd);
63 }
64 // 绘制列
65 for (int i = 1; i < m_nRow; ++i)
66 {
67 nXBeing = this->width() / m_nRow * i;
68 nYBeing = 0;
69 nXEnd = nXBeing;
70 nYEnd = this->height();
71
72 painter.drawLine(nXBeing, nYBeing, nXEnd, nYEnd);
73 }
74 // 根据选中的数组显示红线
75 drawCell(painter);
76 // 计算输出经纬度值
77 getSelectLonLat();
78 }
79
80 void TBoxSelectWidget::mousePressEvent(QMouseEvent *event)
81 {
82 m_nX = event->x();
83 m_nY = event->y();
84 m_nXBeing = m_nX;
85 m_nYBeing = m_nY;
86
87 if(0 == m_nMultizoneMode)
88 setArrayNull(false);
89
90 this->repaint();
91 }
92
93 void TBoxSelectWidget::mouseReleaseEvent(QMouseEvent *event)
94 {
95 m_nX = event->x();
96 m_nY = event->y();
97
98 getMouseXYToArrayIndex(m_nXBeing, m_nYBeing, m_nX, m_nY);
99 this->repaint();
100 }
101
102 void TBoxSelectWidget::mouseMoveEvent(QMouseEvent *event)
103 {
104 m_nX = event->x();
105 m_nY = event->y();
106
107 if(1 == m_nRealTimeShowMode)
108 {
109 getMouseXYToArrayIndex(m_nXBeing, m_nYBeing, m_nX, m_nY);
110 this->repaint();
111 }
112 }
113
114 void TBoxSelectWidget::addMouseXY(int x, int y)
115 {
116
117 }
118
119 void TBoxSelectWidget::setArrayNull(bool value)
120 {
121 m_Array.resize(m_nRow);
122 for(int j = 0; j< m_Array.size(); j++)
123 {
124 m_Array[j].resize(m_nCol);
125 }
126
127 for(int i = 0; i < m_nRow; ++i)
128 {
129 for(int j = 0; j < m_nCol; ++j)
130 {
131 m_Array[i][j] = value;
132 }
133 }
134 //
135 // m_Array[0][9] = true;
136 // m_Array[5][8] = 1;
137
138 }
139
140 void TBoxSelectWidget::getCellWidhtHeight()
141 {
142 m_CellWidth = this->width() / m_nCol;
143 m_CellHeight = this->height() / m_nRow;
144 }
145
146 void TBoxSelectWidget::getCellLonLat()
147 {
148 m_CellLon = qAbs(m_dMapMinLon - m_dMapMaxLon) / m_nCol;
149 m_CellLat = qAbs(m_dMapMinLat - m_dMapMaxLat) / m_nRow;
150 }
151
152 void TBoxSelectWidget::drawCell(QPainter &painter)
153 {
154 for(int i = 0; i < m_Array.size(); ++i)
155 {
156 for(int j = 0; j < m_Array[i].size(); ++j)
157 {
158 if (true == m_Array[i][j])
159 drawGrid(painter, i, j);
160 }
161 }
162 }
163
164 void TBoxSelectWidget::drawGrid(QPainter &painter, int x, int y)
165 {
166 int x1, y1, x2, y2;
167 x1 = m_CellWidth * y;
168 x2 = m_CellWidth * (y + 1);
169 y1 = m_CellHeight * x;
170 y2 = m_CellHeight * (x + 1);
171
172 painter.setPen(Qt::blue);
173 for(int i = y1 + 5; i < y2; i+=5)
174 {
175 painter.drawLine(x1, i, x2, i);
176 }
177 for(int i = x1 + 5; i < x2; i+=5)
178 {
179 painter.drawLine(i, y1, i, y2);
180 }
181 }
182
183 bool TBoxSelectWidget::getMouseXYToArrayIndex(int x, int y, int x2, int y2)
184 {
185 // 计算前的x、y
186 int nX1, nY1, nX2, nY2;
187 if(0 == m_nSelectMode)
188 {
189 nX1 = x;
190 nY1 = y;
191 nX2 = nX1;
192 nY2 = nY1;
193 }
194 else if (1 == m_nSelectMode)
195 {
196 nX1 = x;
197 nY1 = y;
198 nX2 = x2;
199 nY2 = y2;
200 }
201 else if(2 == m_nSelectMode)
202 {
203 nX1 = qMin(x, x2);
204 nY1 = qMin(y, y2);
205 nX2 = qMax(x, x2);
206 nY2 = qMax(y, y2);
207 }
208 // 计算后的行列
209 int nRBeing, nCBeing;
210 int nREnd, nCEnd;
211 if (nX1 == nX2 && nY1 == nY2) // 单选
212 {
213 nRBeing = nY1 % m_CellHeight > 0 ? nY1 / m_CellHeight : nY1 / m_CellHeight + 1;
214 nCBeing = nX1 % m_CellWidth > 0 ? nX1 / m_CellWidth : nX1 / m_CellWidth + 1;
215 // 处理BUG，数组越界
216 nRBeing = qMin(nRBeing, m_nRow -1);
217 nCBeing = qMin(nCBeing, m_nCol -1);
218
219 m_Array[nRBeing][nCBeing] = !m_Array[nRBeing][nCBeing];
220 return true;
221 }
222 else // 多选
223 {
224 nRBeing = nY1 % m_CellHeight > 0 ? nY1 / m_CellHeight : nY1 / m_CellHeight;
225 nCBeing = nX1 % m_CellWidth > 0 ? nX1 / m_CellWidth : nX1 / m_CellWidth;
226
227 nREnd = nY2 % m_CellHeight > 0 ? nY2 / m_CellHeight : nY2 / m_CellHeight;
228 nCEnd = nX2 % m_CellWidth > 0 ? nX2 / m_CellWidth: nX2 / m_CellWidth;
229 // 处理BUG，数组越界
230 nRBeing = qMin(nRBeing, m_nRow -1);
231 nCBeing = qMin(nCBeing, m_nCol -1);
232 nREnd = qMin(nREnd, m_nRow -1);
233 nCEnd = qMin(nCEnd, m_nCol -1);
234 //
235 if (0 == m_nShapeMode)
236 {
237 setArrayNull(false);
238 }
239 for(int i = 0; i < m_Array.size(); ++i)
240 {
241 for(int j = 0; j < m_Array[i].size(); ++j)
242 {
243 if ((i <= nREnd && i >= nRBeing) && (j <= nCEnd && j >= nCBeing))
244 {
245 if(1 == m_nRealTimeShowMode)
246 m_Array[i][j] = 1;
247 else
248 m_Array[i][j] = !m_Array[i][j];
249 }
250 }
251 }
252 return false;
253 }
254 }
255
256 void TBoxSelectWidget::getSelectLonLat()
257 {
258 m_dSelectMinLon = 0;
259 m_dSelectMaxLon = 0;
260 m_dSelectMinLat = 0;
261 m_dSelectMaxLat = 0;
262 int nSelectMinRow = -1;
263 int nSelectMaxRow = -1;
264 int nSelectMinCol = -1;
265 int nSelectMaxCol = -1;
266 for(int i = 0; i < m_Array.size(); ++i)
267 {
268 for(int j = 0; j < m_Array[i].size(); ++j)
269 {
270 if (true == m_Array[i][j])
271 {
272 if(-1 == nSelectMinRow)
273 {
274 nSelectMinRow = i;
275 nSelectMaxRow = i;
276 }
277 else
278 nSelectMaxRow = i;
279 if(-1 == nSelectMinCol)
280 {
281 nSelectMinCol = j;
282 nSelectMaxCol = j;
283 }
284 else
285 nSelectMaxCol = j;
286 }
287 }
288 }
289 // 计算出最后的经纬度
290 if (-1 == nSelectMinRow || -1 == nSelectMinCol)
291 return;
292 m_dSelectMinLon = m_dMapMinLon + m_CellLon * nSelectMinCol;
293 m_dSelectMaxLon = m_dMapMinLon + m_CellLon * (nSelectMaxCol + 1);
294 m_dSelectMinLat = m_dMapMaxLat - m_CellLat * (nSelectMaxRow + 1);
295 m_dSelectMaxLat = m_dMapMaxLat - m_CellLat * nSelectMinRow;
296 qDebug() <<
297 "m_dSelectMinLon:" << m_dSelectMinLon <<
298 "m_dSelectMaxLon:" << m_dSelectMaxLon <<
299 "m_dSelectMinLat:" << m_dSelectMinLat <<
300 "m_dSelectMaxLat:" << m_dSelectMaxLat;
301 }
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<iframe height="240" width="320"></iframe> 标签：Qt,地图功能,int,double,void,框选,Array,MainWindow,TBoxSelectWidget From： https://www.cnblogs.com/FKdelphi/p/17041173.html