Qt5实现的虚拟键盘通过重写LineEdit 实现

#include "keyboardendialog.h" #include "ui_keyboardendialog.h" keyboardEnDialog::keyboardEnDialog(QWidget *parent) : QDialog(parent), ui(new Ui::keyboardEnDialog) { ui->setupUi(this); initValue(""); init(); } keyboardEnDialog::keyboardEnDialog(QString s, QWidget *parent) : QDialog(parent), ui(new Ui::keyboardEnDialog) { ui->setupUi(this); initValue(s); init(); } keyboardEnDialog::~keyboardEnDialog() { delete ui; } void keyboardEnDialog::btn_clicked() { QPushButton *btn = (QPushButton *)sender(); if(btn == ui->pb_close){ this->reject(); return ; } if(btn == ui->pb_enter) { this->accept(); return ; } if(btn == ui->pb_delete) { delOneValue(); return ; } if(btn == ui->pb_blank) { addChar(" "); return ; } if(btn == ui->pb_Caps) { switchsmallOrletter(); return ; } QString objectName = btn->text(); addChar(objectName); } void keyboardEnDialog::init() { // this->setWindowFlags(Qt::FramelessWindowHint); // this->setWindowFlags(Qt::FramelessWindowHint | Qt::Dialog); setWindowModality(Qt::WindowModal);//半阻塞模式 QList<QPushButton *> btn = this->findChildren<QPushButton *>(); foreach (QPushButton * b, btn) { connect(b, SIGNAL(clicked()), this, SLOT(btn_clicked())); } } void keyboardEnDialog::addChar(QString s) { keyboard::addChar(s); ui->lineEdit->setText(value); } void keyboardEnDialog::delOneValue() { keyboard::delOneValue(); ui->lineEdit->setText(value); } void keyboardEnDialog::initValue(QString s) { keyboard::initValue(s); ui->lineEdit->setText(s); } void keyboardEnDialog::switchsmallOrletter() { QList<QPushButton *> btn = this->findChildren<QPushButton *>(); QString t; foreach (QPushButton * b, btn) { t = b->text(); if(t.size() == 1) { if(t[0].isLower()) { t[0] = t[0].toUpper(); } else if(t[0].isUpper()) { t[0] = t[0].toLower(); } } b->setText(t); } }