QT数字软键盘，包括QLineEdit弹出

#include "numkeyboard.h" #include "ui_numkeyboard.h" NumKeyboard::NumKeyboard(QWidget *parent) : QDialog(parent), ui(new Ui::NumKeyboard) { ui->setupUi(this); strContent = ""; ui->lineEdit->setText(strContent); ui->lineEdit->setFocus(); ui->lineEdit->installEventFilter(this); } NumKeyboard::~NumKeyboard() { delete ui; } void NumKeyboard::changeEvent(QEvent *e) { QDialog::changeEvent(e); switch (e->type()) { case QEvent::LanguageChange: ui->retranslateUi(this); break; default: break; } } bool NumKeyboard::eventFilter(QObject *obj, QEvent *event) { if (event->type() == QEvent::KeyPress) { QKeyEvent *keyEvent = static_cast<QKeyEvent *>(event); if (obj == ui->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::on_num1Button_clicked() //1 { int idx = ui->lineEdit->cursorPosition(); if(strContent.left(idx) == "0") { ui->lineEdit->setCursorPosition(idx); ui->lineEdit->setFocus(); return; } strContent.insert(idx, '1'); ui->lineEdit->setText(strContent); ui->lineEdit->setCursorPosition(idx+1); ui->lineEdit->setFocus(); } void NumKeyboard::on_num2Button_clicked() //2 { int idx = ui->lineEdit->cursorPosition(); if(strContent.left(idx) == "0") { ui->lineEdit->setCursorPosition(idx); ui->lineEdit->setFocus(); return; } strContent.insert(idx, '2'); ui->lineEdit->setText(strContent); ui->lineEdit->setCursorPosition(idx+1); ui->lineEdit->setFocus(); } void NumKeyboard::on_num3Button_clicked() //3 { int idx = ui->lineEdit->cursorPosition(); if(strContent.left(idx) == "0") { ui->lineEdit->setCursorPosition(idx); ui->lineEdit->setFocus(); return; } strContent.insert(idx, '3'); ui->lineEdit->setText(strContent); ui->lineEdit->setCursorPosition(idx+1); ui->lineEdit->setFocus(); } void NumKeyboard::on_num4Button_clicked() //4 { int idx = ui->lineEdit->cursorPosition(); if(strContent.left(idx) == "0") { ui->lineEdit->setCursorPosition(idx); ui->lineEdit->setFocus(); return; } strContent.insert(idx, '4'); ui->lineEdit->setText(strContent); ui->lineEdit->setCursorPosition(idx+1); ui->lineEdit->setFocus(); } void NumKeyboard::on_num5Button_clicked() //5 { int idx = ui->lineEdit->cursorPosition(); if(strContent.left(idx) == "0") { ui->lineEdit->setCursorPosition(idx); ui->lineEdit->setFocus(); return; } strContent.insert(idx, '5'); ui->lineEdit->setText(strContent); ui->lineEdit->setCursorPosition(idx+1); ui->lineEdit->setFocus(); } void NumKeyboard::on_num6Button_clicked() //6 { int idx = ui->lineEdit->cursorPosition(); if(strContent.left(idx) == "0") { ui->lineEdit->setCursorPosition(idx); ui->lineEdit->setFocus(); return; } strContent.insert(idx, '6'); ui->lineEdit->setText(strContent); ui->lineEdit->setCursorPosition(idx+1); ui->lineEdit->setFocus(); } void NumKeyboard::on_num7Button_clicked() //7 { int idx = ui->lineEdit->cursorPosition(); if(strContent.left(idx) == "0") { ui->lineEdit->setCursorPosition(idx); ui->lineEdit->setFocus(); return; } strContent.insert(idx, '7'); ui->lineEdit->setText(strContent); ui->lineEdit->setCursorPosition(idx+1); ui->lineEdit->setFocus(); } void NumKeyboard::on_num8Button_clicked() //8 { int idx = ui->lineEdit->cursorPosition(); if(strContent.left(idx) == "0") { ui->lineEdit->setCursorPosition(idx); ui->lineEdit->setFocus(); return; } strContent.insert(idx, '8'); ui->lineEdit->setText(strContent); ui->lineEdit->setCursorPosition(idx+1); ui->lineEdit->setFocus(); } void NumKeyboard::on_num9Button_clicked() //9 { int idx = ui->lineEdit->cursorPosition(); if(strContent.left(idx) == "0") { ui->lineEdit->setCursorPosition(idx); ui->lineEdit->setFocus(); return; } strContent.insert(idx, '9'); ui->lineEdit->setText(strContent); ui->lineEdit->setCursorPosition(idx+1); ui->lineEdit->setFocus(); } void NumKeyboard::on_dotButton_clicked() //. { int idx = ui->lineEdit->cursorPosition(); if(idx==0 || strContent.contains('.')) { ui->lineEdit->setCursorPosition(idx); ui->lineEdit->setFocus(); return; } strContent.insert(idx, '.'); ui->lineEdit->setText(strContent); ui->lineEdit->setCursorPosition(idx+1); ui->lineEdit->setFocus(); } void NumKeyboard::on_num0Button_clicked() //0 { int idx = ui->lineEdit->cursorPosition(); if(strContent.left(idx) == "0" || (idx==0 &&strContent!="")) { ui->lineEdit->setCursorPosition(idx); ui->lineEdit->setFocus(); return; } strContent.insert(idx, '0'); ui->lineEdit->setText(strContent); ui->lineEdit->setCursorPosition(idx+1); ui->lineEdit->setFocus(); } void NumKeyboard::on_signButton_clicked() //+/- { int idx = ui->lineEdit->cursorPosition(); if(strContent.left(1) == "-") { strContent.remove(0, 1); ui->lineEdit->setText(strContent); ui->lineEdit->setCursorPosition(idx-1); ui->lineEdit->setFocus(); } else { if(strContent=="0" || strContent=="") { ui->lineEdit->setCursorPosition(idx); ui->lineEdit->setFocus(); } else { strContent.insert(0, '-'); ui->lineEdit->setText(strContent); ui->lineEdit->setCursorPosition(idx+1); ui->lineEdit->setFocus(); } } } void NumKeyboard::on_leftButton_clicked() //left { int idx = ui->lineEdit->cursorPosition(); if(idx == 0) { ui->lineEdit->setCursorPosition(idx); ui->lineEdit->setFocus(); return; } ui->lineEdit->setCursorPosition(idx-1); ui->lineEdit->setFocus(); } void NumKeyboard::on_rightButton_clicked() //right { int idx = ui->lineEdit->cursorPosition(); if(idx == strContent.length()) { ui->lineEdit->setCursorPosition(idx); ui->lineEdit->setFocus(); return; } ui->lineEdit->setCursorPosition(idx+1); ui->lineEdit->setFocus(); } void NumKeyboard::on_backspaceButton_clicked() //backspace { int idx = ui->lineEdit->cursorPosition(); if(idx == 0) { ui->lineEdit->setCursorPosition(idx); ui->lineEdit->setFocus(); return; } strContent.remove(idx-1,1); ui->lineEdit->setText(strContent); ui->lineEdit->setCursorPosition(idx-1); ui->lineEdit->setFocus(); } void NumKeyboard::on_cancelButton_clicked() //cancel { this->close(); valid = false; } void NumKeyboard::on_okButton_clicked() //ok { this->close(); valid = true; } void NumKeyboard::setText(QString str) //设置文本内容 { strContent = str; ui->lineEdit->setText(strContent); ui->lineEdit->setFocus(); } QString NumKeyboard::getText() //获取内容 { return strContent; }