基于嵌入式的智能散料投饲机上位机.zip

#include "numkeyboard.h" #include <QDebug> #include <QGridLayout> #include <QButtonGroup> #include <QFile> #include <QApplication> QString st_letter[11]={"0","1","2","3","4","5","6","7","8","9","."}; NumKeyboard::NumKeyboard(QWidget *parent) : QDialog(parent) { QGridLayout *layout = new QGridLayout(); QButtonGroup *button_group = new QButtonGroup(this); okButton = new QPushButton(this); okButton->setText("确定"); button_group->addButton(okButton,15); layout->addWidget(okButton,4,3,1,2); backspaceButton = new QPushButton(this); backspaceButton->setText("<<"); button_group->addButton(backspaceButton,12); layout->addWidget(backspaceButton,1,3,1,2); num6Button = new QPushButton(this); num6Button->setText("6"); button_group->addButton(num6Button,6); layout->addWidget(num6Button,2,2,1,1); num4Button = new QPushButton(this); num4Button->setText("4"); button_group->addButton(num4Button,4); layout->addWidget(num4Button,2,0,1,1); leftButton = new QPushButton(this); leftButton->setText("<-"); button_group->addButton(leftButton,13); layout->addWidget(leftButton,2,3,1,1); num1Button = new QPushButton(this); num1Button->setText("1"); button_group->addButton(num1Button,1); layout->addWidget(num1Button,1,0,1,1); cancelButton = new QPushButton(this); cancelButton->setText("取消"); button_group->addButton(cancelButton,11); layout->addWidget(cancelButton,3,3,1,2); rightButton = new QPushButton(this); rightButton->setText("->"); button_group->addButton(rightButton,14); layout->addWidget(rightButton,2,4,1,1); num0Button = new QPushButton(this); num0Button->setText("0"); button_group->addButton(num0Button,0); layout->addWidget(num0Button,4,0,1,2); num5Button = new QPushButton(this); num5Button->setText("5"); num9Button = new QPushButton(this); num9Button->setText("9"); button_group->addButton(num9Button,9); layout->addWidget(num9Button,3,2,1,1); num8Button = new QPushButton(this); num8Button->setText("8"); button_group->addButton(num8Button,8); layout->addWidget(num8Button,3,1,1,1); num2Button = new QPushButton(this); num2Button->setText("2"); button_group->addButton(num2Button,2); layout->addWidget(num2Button,1,1,1,1); num7Button = new QPushButton(this); num7Button->setText("7"); button_group->addButton(num7Button,7); layout->addWidget(num7Button,3,0,1,1); // dotButton = new QPushButton(this); // dotButton->setText("."); // button_group->addButton(dotButton,10); // layout->addWidget(dotButton,4,2,1,1); num3Button = new QPushButton(this); num3Button->setText("3"); button_group->addButton(num3Button,3); layout->addWidget(num3Button,1,2,1,1); button_group->addButton(num5Button,5); layout->addWidget(num5Button,2,1,1,1); lineEdit = new QLineEdit(this); lineEdit->setText(QString()); lineEdit->setFont(QFont( "Timers" , 35 , QFont::Bold) ); layout->addWidget(lineEdit,0,0,1,5); //通过资源文件修改键盘样式 QString qss; QFile qssFile(":/myQss.qss"); qssFile.open(QFile::ReadOnly); if(qssFile.isOpen()) { qss = QLatin1String(qssFile.readAll()); qApp->setStyleSheet(qss); qssFile.close(); } //连接button_group的点击信号，和本对象的buttonClickResponse函数，传递参数为按钮号 connect(button_group,SIGNAL(buttonClicked(int)),SLOT(buttonClickResponse(int))); QList<QPushButton*> btnList = this->findChildren<QPushButton*>(); for(int i = 0; i < btnList.size(); i++) { QPushButton* btn = btnList.at(i); btn->setObjectName("keyboard"); } setLayout(layout); } NumKeyboard::~NumKeyboard() { } void NumKeyboard::changeEvent(QEvent *e) { QDialog::changeEvent(e); switch (e->type()) { case QEvent::LanguageChange: break; default: break; } } bool NumKeyboard::eventFilter(QObject *obj, QEvent *event) { if (event->type() == QEvent::KeyPress) { QKeyEvent *keyEvent = static_cast<QKeyEvent *>(event); if (obj == lineEdit) { if(keyEvent->key() >= 0x20 && keyEvent->key()<= 0x0ff) //屏蔽所有按键输入 return true; else return false; } else { return false; } } else { // standard event processing return QObject::eventFilter(obj, event); } } //***********************按键*****************************// void NumKeyboard::buttonClickResponse(int gemfield) // { if( gemfield >=0 && gemfield <= 10) { int idx = lineEdit->cursorPosition(); //光标的位置索引 //字符串的存储有引用计数，当一个 QString 对象被复制为另一个 QString 对象时，它们实际上指向相同的存储空间，仅仅是增加一个引用计数 strContent.insert(idx, st_letter[gemfield]); //插入字符串str在给定的索引位置对这个字符串,并返回一个引用。 //数据存入strContent lineEdit->setText(strContent); //strContent中的内容显示在lineEdit lineEdit->setCursorPosition(idx+1); //设置光标的位置 ??不设置好像也可以使用设定光标的位置 lineEdit->setFocus(); //存在光标 qDebug()<<"strContent"<<strContent; qDebug()<<"idx"<<idx; } else if( gemfield == 13)//<- { int idx = lineEdit->cursorPosition(); if(idx == 0) { lineEdit->setCursorPosition(idx); lineEdit->setFocus(); return; } lineEdit->setCursorPosition(idx-1); lineEdit->setFocus(); } else if( gemfield == 14)//-> { int idx = lineEdit->cursorPosition(); if(idx == strContent.length()) //返回此字符串的字符数 { lineEdit->setCursorPosition(idx); lineEdit->setFocus(); return; } lineEdit->setCursorPosition(idx+1); lineEdit->setFocus(); } else if( gemfield == 12)//<< { int idx = lineEdit->cursorPosition(); if(idx == 0) { lineEdit->setCursorPosition(idx); lineEdit->setFocus(); return; } strContent.remove(idx-1,1); lineEdit->setText(strContent); lineEdit->setCursorPosition(idx-1); lineEdit->setFocus(); } else if( gemfield == 11)//ESC { this->close(); valid = false; } else if( gemfield == 15)//OK { this->close(); valid = true; } } void NumKeyboard::setText(QString str) //设置文本内容 { strContent = str; lineEdit->setText(strContent); } QString NumKeyboard::getText() //获取内容 { return strContent; }