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相关资料：
http://www.manongjc.com/detail/15-grpefyhtwdpbehh.html Qt自定义文本输入框实现支持输入度分秒和度两种格式(简易无限制输入)
PS:重要的文件我用粗体标注了。
实例代码：
.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 CustomEdit.cpp \
20 main.cpp \
21 mainwindow.cpp
22
23 HEADERS += \
24 CustomEdit.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
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 "CustomEdit.h"
6
7 QT_BEGIN_NAMESPACE
8 namespace Ui { class MainWindow; }
9 QT_END_NAMESPACE
10
11 class MainWindow : public QMainWindow
12 {
13 Q_OBJECT
14
15 public:
16 MainWindow(QWidget *parent = nullptr);
17 ~MainWindow();
18
19 private:
20 Ui::MainWindow *ui;
21 };
22 #endif // MAINWINDOW_H
View Code
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 setWindowTitle(QStringLiteral("Qt之自定义输入框(度分秒、经纬度、格式化显示)"));
11
12 TCustomEdit *m_pCustomEdit = new TCustomEdit(this);
13 m_pCustomEdit->setPlaceholderText(QStringLiteral("普通输入框"));
14 m_pCustomEdit->setGeometry(ui->textEdit->x(), ui->textEdit->y() + ui->textEdit->height(), 200, 30);
15
16 TCustomEdit *m_pCustomEdit1 = new TCustomEdit(this);
17 m_pCustomEdit1->setMode(1);
18 m_pCustomEdit1->setPlaceholderText(QStringLiteral("度分秒转经纬度"));
19 m_pCustomEdit1->setGeometry(m_pCustomEdit->x(), m_pCustomEdit->y() + m_pCustomEdit->height(), 200, 30);
20
21 TCustomEdit *m_pCustomEdit2 = new TCustomEdit(this);
22 m_pCustomEdit2->setMode(2);
23 m_pCustomEdit2->setPlaceholderText(QStringLiteral("经纬转度分秒"));
24 m_pCustomEdit2->setGeometry(m_pCustomEdit1->x(), m_pCustomEdit1->y() + m_pCustomEdit1->height(), 200, 30);
25
26 TCustomEdit *m_pCustomEdit3 = new TCustomEdit(this);
27 m_pCustomEdit3->setMode(3);
28 m_pCustomEdit3->setPlaceholderText(QStringLiteral("', '、' '号分隔"));
29 m_pCustomEdit3->setGeometry(m_pCustomEdit2->x(), m_pCustomEdit2->y() + m_pCustomEdit2->height(), 200, 30);
30 }
31
32 MainWindow::~MainWindow()
33 {
34 delete ui;
35 }
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>601</width>
10 <height>291</height>
11 </rect>
12 </property>
13 <property name="windowTitle">
14 <string>MainWindow</string>
15 </property>
16 <widget class="QWidget" name="centralwidget">
17 <widget class="QTextEdit" name="textEdit">
18 <property name="geometry">
19 <rect>
20 <x>10</x>
21 <y>0</y>
22 <width>421</width>
23 <height>61</height>
24 </rect>
25 </property>
26 <property name="markdown">
27 <string>29°44′16.25″ 29.73784595 103°35′11.02″ 103.5863933
28
29 </string>
30 </property>
31 <property name="html">
32 <string><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN" "http://www.w3.org/TR/REC-html40/strict.dtd">
33 <html><head><meta name="qrichtext" content="1" /><style type="text/css">
34 p, li { white-space: pre-wrap; }
35 </style></head><body style=" font-family:'SimSun'; font-size:9pt; font-weight:400; font-style:normal;">
36 <p style=" margin-top:6px; margin-bottom:6px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">29°44′16.25″ 29.73784595 103°35′11.02″ 103.5863933</p></body></html></string>
37 </property>
38 <property name="placeholderText">
39 <string/>
40 </property>
41 </widget>
42 </widget>
43 <widget class="QMenuBar" name="menubar">
44 <property name="geometry">
45 <rect>
46 <x>0</x>
47 <y>0</y>
48 <width>601</width>
49 <height>22</height>
50 </rect>
51 </property>
52 </widget>
53 <widget class="QStatusBar" name="statusbar"/>
54 </widget>
55 <resources/>
56 <connections/>
57 </ui>
View Code
CustomEdit.h
1 #ifndef CUSTOMEDIT_H
2 #define CUSTOMEDIT_H
3
4 #include <QLineEdit>
5
6 class TCustomEdit : public QLineEdit
7 {
8 Q_OBJECT
9
10 public:
11 TCustomEdit(QWidget *parent = 0);
12 ~TCustomEdit();
13
14 void setMode(int mode);
15 private:
16 void focusOutEvent(QFocusEvent *event) Q_DECL_OVERRIDE;
17
18 int m_nMode = 0;
19 };
20
21 #endif // CUSTOMEDIT_H
View Code
CustomEdit.cpp
1 #include "CustomEdit.h"
2
3 TCustomEdit::TCustomEdit(QWidget *parent)
4 : QLineEdit(parent)
5 {
6 }
7
8 TCustomEdit::~TCustomEdit()
9 {
10 }
11
12 void TCustomEdit::setMode(int mode)
13 {
14 m_nMode = mode;
15 }
16
17 void TCustomEdit::focusOutEvent(QFocusEvent *event)
18 {
19 QLineEdit::focusOutEvent(event);
20
21 switch (m_nMode)
22 {
23 case 0:
24 break;
25 case 1: // 显示成经纬度(度分秒转经纬度)
26 {
27 QString curText = text();
28 QString str = curText.replace(QStringLiteral("°"), ",").replace(QStringLiteral("′"), ",").replace(QStringLiteral("″"), "");
29 QStringList listStr = str.split(",");
30 if (listStr.size() != 3) return;
31 bool isD = false, isF = false, isM = false;
32 float d = listStr[0].toFloat(&isD);
33 float f = listStr[1].toFloat(&isF);
34 float m = listStr[2].toFloat(&isM);
35 if (!isD || !isF || !isM) return;
36 setText(QString::number(d + f / 60.0 + m / 3600.0));
37 break;
38 }
39 case 2:// 显示成度分秒(经纬转度分秒)
40 {
41 QString curText = text();
42 QString str = curText.replace(QStringLiteral("."), ",");
43 QStringList listStr = str.split(",");
44 if (listStr.size() != 2) return;
45 bool isZ = false, isX = false;
46 int d = listStr[0].toInt(&isZ);
47 float f = listStr[1].toFloat(&isX);
48 if (!isZ || !isX) return;
49 // 分
50 for (int i = 0 ; i < listStr[1].length(); ++i)
51 f = f/10;
52 int nF = QString::number(f*60).split(".")[0].toInt();
53 // 秒
54 float m = QString::number(f*60).split(".")[1].toFloat();
55 for (int i = 0 ; i < QString::number(f*60).split(".")[1].length(); ++i)
56 m = m/10;
57 int nM = QString::number(m*60).split(".")[0].toInt();
58
59 setText(QStringLiteral("%1°%2′%3″").arg(d).arg(nF).arg(nM));
60 break;
61 }
62 case 3:// 显示成度分秒("," " "号分隔)
63 {
64 QString curText = text().trimmed();
65 QString str = curText.replace(QStringLiteral(","), ",").replace(QStringLiteral(" "), ",");
66 QStringList listStr = str.split(",");
67 if (listStr.size() != 3) return;
68 bool isD = false, isF = false, isM = false;
69 int d = listStr[0].toInt(&isD);
70 int f = listStr[1].toInt(&isF);
71 float m = listStr[2].toFloat(&isM);
72 if (!isD || !isF || !isM) return;
73 setText(QStringLiteral("%1°%2′%3″").arg(d).arg(f).arg(m));
74 break;
75 }
76
77
78 }
79
80 }
View Code
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<iframe></iframe> 标签：QStringLiteral,TCustomEdit,Qt,自定义,quot,listStr,分秒,lt,MainWindow From： https://www.cnblogs.com/FKdelphi/p/16985163.html