<Qt5 实战>No.02 简易软键盘 - 支持中文输入

xiaoxiao2021-02-28  5

一、Qt版本:Qt 5.9.3 (MSVC 2015, 32 bit)

二、局限性: 

1)只适用于QLineEdit,但可按需更改。

2)界面简单。只提供了中英文输入,数字输入,大小写转换,其它功能暂未实现。

3)ARM开发板上中文乱码。后续看情况调试更新。

更新日志:2018年01月18日更新,解决ARM开发板中文输入乱码。

更新代码在这里列出,下面的源代码就不改了。

(1)添加头文件:#include <QTextCodec>

(2)在loadziku()函数(第99行)中:

①第110行 QString zikuAll; 代码行上面一行添加:

QTextCodec *codec = QTextCodec::codecForName("GBK");

②第121行 QString str = QString::fromLocal8Bit(buf); 改为:

QString str = codec->toUnicode(buf);

三、来一截图展示:

四、上代码:

1)头文件:keyboard.h

#ifndef KEYBOARD_H #define KEYBOARD_H #include <QDialog> #include <QButtonGroup> #include <QList> #include <QLineEdit> namespace Ui { class KeyBoard; } class KeyBoard : public QDialog { Q_OBJECT public: explicit KeyBoard(QWidget *parent = 0, QLineEdit *LineEdit = 0); ~KeyBoard(); QString outputStr; protected: QString findChinese(QString PinYin); void setHanziBt(); private slots: void on_caps_Bt_clicked(); void slot_numClicked(QAbstractButton *bt); void slot_carClicked(QAbstractButton *bt); void slot_hanziBtClicked(QAbstractButton *bt); void on_zh_us_Bt_clicked(); void on_delBt_clicked(); void on_nextBt_clicked(); void on_prevBt_clicked(); void on_closeBt_clicked(); private: Ui::KeyBoard *ui; bool isCap; // 大小写控制 QButtonGroup *carGroup; QList<QAbstractButton *> carList; QList<QAbstractButton *> zhList; QStringList zikuList; // 字库一行一行分割 int pageAll; // 总页数 int curPage; // 当前页 QStringList pageList; // 查找出的字符串10个10个分割 QLineEdit *lineEdit; void loadziku(); // 加载中文字库 }; #endif // KEYBOARD_H

2)cpp文件:keyboard.cpp

#include "keyboard.h" #include "ui_keyboard.h" #include <QDebug> #include <QMessageBox> #include <QFile> KeyBoard::KeyBoard(QWidget *parent, QLineEdit *LineEdit) : QDialog(parent), ui(new Ui::KeyBoard) { ui->setupUi(this); this->setWindowTitle( tr("键盘") ); // this->setWindowOpacity(0.8); // this->setStyleSheet(""); isCap = false; outputStr = ""; lineEdit = LineEdit; pageAll = 0; curPage = 0; ui->nextBt->setEnabled(false); ui->prevBt->setEnabled(false); QButtonGroup *numGroup = new QButtonGroup(); numGroup->addButton(ui->num_0_Bt, 0); numGroup->addButton(ui->num_1_Bt, 1); numGroup->addButton(ui->num_2_Bt, 2); numGroup->addButton(ui->num_3_Bt, 3); numGroup->addButton(ui->num_4_Bt, 4); numGroup->addButton(ui->num_5_Bt, 5); numGroup->addButton(ui->num_6_Bt, 6); numGroup->addButton(ui->num_7_Bt, 7); numGroup->addButton(ui->num_8_Bt, 8); numGroup->addButton(ui->num_9_Bt, 9); connect( numGroup, SIGNAL(buttonClicked(QAbstractButton*)), this, SLOT(slot_numClicked(QAbstractButton*)) ); QButtonGroup *carGroup = new QButtonGroup(); carGroup->addButton(ui->q_Bt, 1); carGroup->addButton(ui->w_Bt, 2); carGroup->addButton(ui->e_Bt, 3); carGroup->addButton(ui->r_Bt, 4); carGroup->addButton(ui->t_Bt, 5); carGroup->addButton(ui->y_Bt, 6); carGroup->addButton(ui->u_Bt, 7); carGroup->addButton(ui->i_Bt, 8); carGroup->addButton(ui->o_Bt, 9); carGroup->addButton(ui->p_Bt, 10); carGroup->addButton(ui->a_Bt, 11); carGroup->addButton(ui->s_Bt, 12); carGroup->addButton(ui->d_Bt, 13); carGroup->addButton(ui->f_Bt, 14); carGroup->addButton(ui->g_Bt, 15); carGroup->addButton(ui->h_Bt, 16); carGroup->addButton(ui->j_Bt, 17); carGroup->addButton(ui->k_Bt, 18); carGroup->addButton(ui->l_Bt, 19); carGroup->addButton(ui->z_Bt, 20); carGroup->addButton(ui->x_Bt, 21); carGroup->addButton(ui->c_Bt, 22); carGroup->addButton(ui->v_Bt, 23); carGroup->addButton(ui->b_Bt, 24); carGroup->addButton(ui->n_Bt, 25); carGroup->addButton(ui->m_Bt, 26); connect( carGroup, SIGNAL(buttonClicked(QAbstractButton*)), this, SLOT(slot_carClicked(QAbstractButton*)) ); carList = carGroup->buttons(); QButtonGroup *hanziGroup = new QButtonGroup(); hanziGroup->addButton(ui->zh_1_Bt, 1); hanziGroup->addButton(ui->zh_2_Bt, 2); hanziGroup->addButton(ui->zh_3_Bt, 3); hanziGroup->addButton(ui->zh_4_Bt, 4); hanziGroup->addButton(ui->zh_5_Bt, 5); hanziGroup->addButton(ui->zh_6_Bt, 6); hanziGroup->addButton(ui->zh_7_Bt, 7); hanziGroup->addButton(ui->zh_8_Bt, 8); hanziGroup->addButton(ui->zh_9_Bt, 9); hanziGroup->addButton(ui->zh_10_Bt, 10); connect( hanziGroup, SIGNAL(buttonClicked(QAbstractButton*)), this, SLOT(slot_hanziBtClicked(QAbstractButton*))); zhList = hanziGroup->buttons(); // 加载字库 loadziku(); } KeyBoard::~KeyBoard() { delete ui; } /* 加载字库 */ void KeyBoard::loadziku() { // 加载字库文件 QFile zikuFile(":/ziku1/ziku.dat"); if ( !zikuFile.open(QIODevice::ReadOnly | QIODevice::Text) ) { QMessageBox::information(this, "键盘字库", "加载字库文件错误,中文输入不可用!", QMessageBox::Ok); ui->zh_us_Bt->setEnabled(false); return; } QString zikuAll; while (true) { char buf[1024]; qint64 len = zikuFile.readLine(buf, sizeof(buf)); if (len <= 0) { break; } QString str = QString::fromLocal8Bit(buf); zikuAll += str; } zikuList = zikuAll.split("\n"); //用QString的split函数将字库文件划分成一段一段,每个拼音对应一段字库 zikuFile.close(); } /* 查找中文 */ QString KeyBoard::findChinese(QString PinYin) { QStringList lst; QString Line; QString returnChinese; for(int i = 0; i < zikuList.count(); i++)//m_srf.count()QStringList有多少段 { Line = zikuList.at(i); if (Line.isEmpty() || PinYin.isEmpty()) continue; lst = Line.split(","); if (QString::compare(lst.at(0), PinYin, Qt::CaseInsensitive) == 0) { returnChinese = lst.at(1); } } // 字符串分割成10个10个一组 pageList.clear(); int len = returnChinese.length(); if (len > 0) { pageAll = len % 10 == 0 ? len/10 : (len/10) + 1; QString str; for (int i = 1; i <= len; i++) { str += returnChinese.at(i-1); if (i % 10 == 0 && i != 0) { pageList << str; str = ""; } } if (len % 10 != 0) { pageList << returnChinese.right(len % 10); } }//if return returnChinese; } /* 汉字按钮的设置 */ void KeyBoard::setHanziBt() { for (int i = 0; i < 10; i++) { zhList.at(i)->setText(""); } QString PinYin = ui->showLb->text(); QString ChineseStr = findChinese(PinYin); ui->nextBt->setEnabled(false); ui->prevBt->setEnabled(false); if (ChineseStr != "") { int ChineseStrCount = ChineseStr.length(); // 10字以内汉字个数 if (ChineseStrCount <= 10) { for (int i = 0; i < ChineseStrCount; i++) { ((QPushButton *)zhList.at(i))->setText(ChineseStr.at(i)); } return; } // 大于十字 for (int i = 0; i < 10; i++) { ((QPushButton *)zhList.at(i))->setText(ChineseStr.at(i)); } ui->nextBt->setEnabled(true); ui->prevBt->setEnabled(true); }//if } /* 大小写转换 */ void KeyBoard::on_caps_Bt_clicked() { if (isCap == false) // 小写状态 { for (int i = 0; i < carList.size(); i++) { QString upper = carList.at(i)->text().toUpper(); carList.at(i)->setText(upper); } isCap = true; return; } else // 大写状态 { for (int i = 0; i < carList.size(); i++) { QString lower = carList.at(i)->text().toLower(); carList.at(i)->setText(lower); } isCap = false; return; } } /* 数字键盘点击 */ void KeyBoard::slot_numClicked(QAbstractButton *bt) { QPushButton *tmpBt = (QPushButton *)bt; QString str = lineEdit->text(); str.append(tmpBt->text()); lineEdit->setText(str); } /* 字母键点击 */ void KeyBoard::slot_carClicked(QAbstractButton *bt) { QPushButton *tmp = (QPushButton *)bt; QString str_1 = ui->showLb->text(); str_1.append(tmp->text()); ui->showLb->setText(str_1); if (ui->langLb->text() == "英文") { QString str_2 = lineEdit->text(); str_2.append(tmp->text()); lineEdit->setText(str_2); } else { setHanziBt(); } } /* 十个中文按钮点击 */ void KeyBoard::slot_hanziBtClicked(QAbstractButton *bt) { QPushButton *tmp = (QPushButton *)bt; QString str = lineEdit->text(); str.append(tmp->text()); lineEdit->setText(str); ui->showLb->setText(""); for (int i = 0; i < 10; i++) { zhList.at(i)->setText(""); } ui->nextBt->setEnabled(false); ui->prevBt->setEnabled(false); } /* 中英切换按钮 */ void KeyBoard::on_zh_us_Bt_clicked() { if (ui->langLb->text() == "英文") { ui->langLb->setText("中文"); ui->showLb->setText(""); } else { ui->langLb->setText("英文"); ui->showLb->setText(""); } } /* 退格键 */ void KeyBoard::on_delBt_clicked() { QString tmp = ui->showLb->text(); ui->showLb->setText(tmp.left(tmp.length() - 1)); if (ui->langLb->text() == "英文") { QString str = lineEdit->text(); lineEdit->setText(str.left(str.length() - 1)); } else { for (int i = 0; i < 10; i++) { zhList.at(i)->setText(""); } setHanziBt(); if (ui->showLb->text() == "") // 中文模式下,showLb中删除完毕才去删除LineEdit里的文字 { QString str = lineEdit->text(); lineEdit->setText(str.left(str.length() - 1)); } } } /* 翻页按键 */ void KeyBoard::on_nextBt_clicked() { curPage++; if (curPage > pageAll) { curPage = 1; } for (int i = 0; i < 10; i++) { zhList.at(i)->setText(""); } QString str = pageList.at(curPage-1); qDebug() << str; for (int i = 0; i < str.length(); i++) { zhList.at(i)->setText(str.at(i)); } } void KeyBoard::on_prevBt_clicked() { curPage--; if (curPage == 0) { curPage = pageAll; } for (int i = 0; i < 10; i++) { zhList.at(i)->setText(""); } QString str = pageList.at(curPage-1); for (int i = 0; i < str.length(); i++) { zhList.at(i)->setText(str.at(i)); } } void KeyBoard::on_closeBt_clicked() { this->close(); }

演示代码下载:http://download.csdn.net/download/wu9797/10197538

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