Calc++.h
Qt Code: 
  1. #ifndef CALC++_H
  2. #define CALC++_H
  3.  
  4. #include <QDialog>
  5. #include "ui_Calc++.h"
  6. class calc:public QDialog ,public Ui::Calc{
  7. 	Q_OBJECT
  8. 	private slots:
  9. 		void edig(const char &num);
  10. 		void set_op_op1(const char &op);
  11. 		void compute_result();
  12. 	public:
  13. 		calc(QWidget *parent=0);
  14. 	private:
  15. 		double op1,op2;
  16. 		char ope;};
  17. #endif
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Calc++.cpp
Qt Code: 
  1. #include <QtGui>
  2. #include "Calc++.h"
  3. calc::calc(QWidget *parent):QDialog(parent){
  4. 	lineEdit->setValidator(new QRegexpValidator(QDoubleValidator,this));
  5. 	QObject::connect(cls,SIGNAL(clicked()),lineEdit,SLOT(clear()));
  6. 	QObject::connect(_1,SIGNAL(clicked()),lineEdit,SLOT(edig(_1->text())));
  7. 	QObject::connect(_2,SIGNAL(clicked()),lineEdit,SLOT(edig(_2->text())));
  8. 	QObject::connect(_3,SIGNAL(clicked()),lineEdit,SLOT(edig(_3->text())));
  9. 	QObject::connect(_4,SIGNAL(clicked()),lineEdit,SLOT(edig(_4->text())));
  10. 	QObject::connect(_5,SIGNAL(clicked()),lineEdit,SLOT(edig(_5->text())));
  11. 	QObject::connect(_6,SIGNAL(clicked()),lineEdit,SLOT(edig(_6->text())));
  12. 	QObject::connect(_7,SIGNAL(clicked()),lineEdit,SLOT(edig(_7->text())));
  13. 	QObject::connect(_8,SIGNAL(clicked()),lineEdit,SLOT(edig(_8->text())));
  14. 	QObject::connect(_9,SIGNAL(clicked()),lineEdit,SLOT(edig(_9->text())));
  15. 	QObject::connect(_10,SIGNAL(clicked()),lineEdit,SLOT(edig(_10->text())));
  16. 	QObject::connect(point,SIGNAL(clicked()),lineEdit,SLOT(edig(point->text())));
  17. 	QObject::connect(unmin,SIGNAL(clicked()),lineEdit,SLOT(edig('u')));
  18. 	QObject::connect(plus,SIGNAL(clicked()),lineEdit,SLOT(set_op_op1('+')));
  19. 	QObject::connect(minus,SIGNAL(clicked()),lineEdit,SLOT(set_op_op1('-')));
  20. 	QObject::connect(multiply,SIGNAL(clicked()),lineEdit,SLOT(set_op_op1('*')));
  21. 	QObject::connect(division,SIGNAL(clicked()),lineEdit,SLOT(set_op_op1('/')));
  22. 	QObject::connect(equal,SIGNAL(clicked()),lineEdit,SLOT(compute_result()));}
  23. void calc::edig(const char &num){
  24. 	if(num=='u') lineEdit->setText(QString((char)((lineEdit->text().toDouble())*(-1))));
  25. 	else lineEdit->setText(lineEdit->text()+num);}
  26. void calc::set_op_op1(const char &op){
  27. 	op1=(lineEdit->text()).toDouble();
  28. 	ope=op;
  29. 	lineEdit->clear();}
  30. void calc::compute_result(){
  31. 	op2=(lineEdit->text()).toDouble();
  32. 	switch(ope){
  33. 		case '+':
  34. 			lineEdit->setText(QString((char)(op1+op2)));
  35. 			break;
  36. 		case '-':
  37. 			lineEdit->setText(QString((char)(op1-op2)));
  38. 			break;
  39. 		case '*':
  40. 			lineEdit->setText(QString((char)(op1*op2)));
  41. 			break;
  42. 		case '/':
  43. 			lineEdit->setText(QString((char)(op1/op2)));
  44. 			break;}}
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ui_Calc++.h
Qt Code: 
  1. /********************************************************************************
  2. ** Form generated from reading ui file 'Calc++.ui'
  3. **
  4. ** Created: Wed Mar 4 15:07:20 2009
  5. **      by: Qt User Interface Compiler version 4.5.0
  6. **
  7. ** WARNING! All changes made in this file will be lost when recompiling ui file!
  8. ********************************************************************************/
  9.  
  10. #ifndef UI_CALC_2B__2B__H
  11. #define UI_CALC_2B__2B__H
  12.  
  13. #include <QtCore/QVariant>
  14. #include <QtGui/QAction>
  15. #include <QtGui/QApplication>
  16. #include <QtGui/QButtonGroup>
  17. #include <QtGui/QDialog>
  18. #include <QtGui/QHeaderView>
  19. #include <QtGui/QLineEdit>
  20. #include <QtGui/QPushButton>
  21.  
  22. QT_BEGIN_NAMESPACE
  23.  
  24. class Ui_Calc
  25. {
  26. public:
  27.     QPushButton *point;
  30.     QPushButton *plus;
  32.     QPushButton *division;
  36.     QPushButton *unmin;
  42.     QLineEdit *lineEdit;
  43.     QPushButton *equal;
  44.     QPushButton *minus;
  45.     QPushButton *multiply;
  46.  
  47.     void setupUi(QDialog *Calc)
  48.     {
  49.         if (Calc->objectName().isEmpty())
  50.             Calc->setObjectName(QString::fromUtf8("Calc"));
  51.         Calc->resize(245, 163);
  52.         point = new QPushButton(Calc);
  53.         point->setObjectName(QString::fromUtf8("point"));
  54.         point->setGeometry(QRect(100, 130, 31, 23));
  55.         cls = new QPushButton(Calc);
  56.         cls->setObjectName(QString::fromUtf8("cls"));
  57.         cls->setGeometry(QRect(200, 40, 31, 41));
  58.         _3 = new QPushButton(Calc);
  59.         _3->setObjectName(QString::fromUtf8("_3"));
  60.         _3->setGeometry(QRect(100, 40, 31, 23));
  61.         plus = new QPushButton(Calc);
  62.         plus->setObjectName(QString::fromUtf8("plus"));
  63.         plus->setGeometry(QRect(150, 40, 31, 23));
  64.         _7 = new QPushButton(Calc);
  65.         _7->setObjectName(QString::fromUtf8("_7"));
  66.         _7->setGeometry(QRect(20, 100, 31, 23));
  67.         division = new QPushButton(Calc);
  68.         division->setObjectName(QString::fromUtf8("division"));
  69.         division->setGeometry(QRect(150, 130, 31, 21));
  70.         _6 = new QPushButton(Calc);
  71.         _6->setObjectName(QString::fromUtf8("_6"));
  72.         _6->setGeometry(QRect(100, 70, 31, 23));
  73.         _5 = new QPushButton(Calc);
  74.         _5->setObjectName(QString::fromUtf8("_5"));
  75.         _5->setGeometry(QRect(60, 70, 31, 23));
  76.         _1 = new QPushButton(Calc);
  77.         _1->setObjectName(QString::fromUtf8("_1"));
  78.         _1->setGeometry(QRect(20, 40, 31, 23));
  79.         unmin = new QPushButton(Calc);
  80.         unmin->setObjectName(QString::fromUtf8("unmin"));
  81.         unmin->setGeometry(QRect(20, 130, 31, 23));
  82.         _4 = new QPushButton(Calc);
  83.         _4->setObjectName(QString::fromUtf8("_4"));
  84.         _4->setGeometry(QRect(20, 70, 31, 23));
  85.         _8 = new QPushButton(Calc);
  86.         _8->setObjectName(QString::fromUtf8("_8"));
  87.         _8->setGeometry(QRect(60, 100, 31, 23));
  88.         _9 = new QPushButton(Calc);
  89.         _9->setObjectName(QString::fromUtf8("_9"));
  90.         _9->setGeometry(QRect(100, 100, 31, 23));
  91.         _2 = new QPushButton(Calc);
  92.         _2->setObjectName(QString::fromUtf8("_2"));
  93.         _2->setGeometry(QRect(60, 40, 31, 23));
  94.         _10 = new QPushButton(Calc);
  95.         _10->setObjectName(QString::fromUtf8("_10"));
  96.         _10->setGeometry(QRect(60, 130, 31, 23));
  97.         lineEdit = new QLineEdit(Calc);
  98.         lineEdit->setObjectName(QString::fromUtf8("lineEdit"));
  99.         lineEdit->setGeometry(QRect(10, 10, 231, 21));
  100.         equal = new QPushButton(Calc);
  101.         equal->setObjectName(QString::fromUtf8("equal"));
  102.         equal->setGeometry(QRect(200, 90, 31, 61));
  103.         minus = new QPushButton(Calc);
  104.         minus->setObjectName(QString::fromUtf8("minus"));
  105.         minus->setGeometry(QRect(150, 70, 31, 23));
  106.         multiply = new QPushButton(Calc);
  107.         multiply->setObjectName(QString::fromUtf8("multiply"));
  108.         multiply->setGeometry(QRect(150, 100, 31, 23));
  109.  
  110.         retranslateUi(Calc);
  111.  
  112.         QMetaObject::connectSlotsByName(Calc);
  113.     } // setupUi
  114.  
  115.     void retranslateUi(QDialog *Calc)
  116.     {
  117.         Calc->setWindowTitle(QApplication::translate("Calc", "Dialog", 0, QApplication::UnicodeUTF8));
  118.         point->setText(QApplication::translate("Calc", ".", 0, QApplication::UnicodeUTF8));
  119.         cls->setText(QApplication::translate("Calc", "&CLS", 0, QApplication::UnicodeUTF8));
  120.         _3->setText(QApplication::translate("Calc", "3", 0, QApplication::UnicodeUTF8));
  121.         plus->setText(QApplication::translate("Calc", "+", 0, QApplication::UnicodeUTF8));
  122.         _7->setText(QApplication::translate("Calc", "7", 0, QApplication::UnicodeUTF8));
  123.         division->setText(QApplication::translate("Calc", "/", 0, QApplication::UnicodeUTF8));
  124.         _6->setText(QApplication::translate("Calc", "6", 0, QApplication::UnicodeUTF8));
  125.         _5->setText(QApplication::translate("Calc", "5", 0, QApplication::UnicodeUTF8));
  126.         _1->setText(QApplication::translate("Calc", "1", 0, QApplication::UnicodeUTF8));
  127.         unmin->setText(QApplication::translate("Calc", "+/-", 0, QApplication::UnicodeUTF8));
  128.         _4->setText(QApplication::translate("Calc", "4", 0, QApplication::UnicodeUTF8));
  129.         _8->setText(QApplication::translate("Calc", "8", 0, QApplication::UnicodeUTF8));
  130.         _9->setText(QApplication::translate("Calc", "9", 0, QApplication::UnicodeUTF8));
  131.         _2->setText(QApplication::translate("Calc", "2", 0, QApplication::UnicodeUTF8));
  132.         _10->setText(QApplication::translate("Calc", "0", 0, QApplication::UnicodeUTF8));
  133.         lineEdit->setText(QString());
  134.         equal->setText(QApplication::translate("Calc", "=", 0, QApplication::UnicodeUTF8));
  135.         minus->setText(QApplication::translate("Calc", "-", 0, QApplication::UnicodeUTF8));
  136.         multiply->setText(QApplication::translate("Calc", "*", 0, QApplication::UnicodeUTF8));
  137.         Q_UNUSED(Calc);
  138.     } // retranslateUi
  139.  
  140. };
  141.  
  142. namespace Ui {
  143.     class Calc: public Ui_Calc {};
  144. } // namespace Ui
  145.  
  146. QT_END_NAMESPACE
  147.  
  148. #endif // UI_CALC_2B__2B__H
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Hi
With due attention to codes above,I have 2 questions.
1-When I wanna run it,I get the Don't send message.What is the problem?
2-Whit due attention to line 4 of Calc++.cpp,Is it the right syntax for setting a validator for a lineEdit to QDoubleValidator?If not,tell the right one.thanks