QT实现中英文键盘

企业开发 2023-09-15 20:53:24 阅读次数: 0

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使用Qt中实现中英文键盘，支持各种linux嵌入式设备。
实现思路：需要一个中文字体库，将字体库加载到一个Hash容器，字母和拼音作为key值，对应的中文作为value值。
核心代码：

#include "UKeyBoard.h"
#include "ui_UKeyBoard.h"
#include <QFile>
#include <QKeyEvent>
#include <QDebug>

UKeyBoard::UKeyBoard(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::UKeyBoard)
{
    
    
    ui->setupUi(this);

    QFile* file = new QFile(QApplication::applicationDirPath()+"/PinYin_Chinese.txt");
    file->open(QIODevice::ReadOnly);
    QString sss = QString::fromUtf8(file->readAll());
    qDebug()<<sss.size();
    QStringList ssslist = sss.split("\r\n");
    foreach (QString var, ssslist) {
    
    
        QStringList pinyin = var.mid(1,var.size() - 1).split(" ");
        QString word = var.mid(0,1);
        for (int i = 0; i < pinyin.size(); ++i) {
    
    
            if (m_wordHash.find(pinyin[i]) == m_wordHash.end())
                m_wordHash.insert(pinyin[i],QStringList()<<word);
            else
                m_wordHash[pinyin[i]].append(word);
        }
    }

    connectInit();
}

UKeyBoard::~UKeyBoard()
{
    
    
    delete ui;
}

void UKeyBoard::connectInit()
{
    
    
    connect(ui->Key_Q_Btn,&QToolButton::clicked,this,&UKeyBoard::slotKeyBtn);
    connect(ui->Key_W_Btn,&QToolButton::clicked,this,&UKeyBoard::slotKeyBtn);
    connect(ui->Key_E_Btn,&QToolButton::clicked,this,&UKeyBoard::slotKeyBtn);
    connect(ui->Key_R_Btn,&QToolButton::clicked,this,&UKeyBoard::slotKeyBtn);
    connect(ui->Key_T_Btn,&QToolButton::clicked,this,&UKeyBoard::slotKeyBtn);
    connect(ui->Key_Y_Btn,&QToolButton::clicked,this,&UKeyBoard::slotKeyBtn);
    connect(ui->Key_U_Btn,&QToolButton::clicked,this,&UKeyBoard::slotKeyBtn);
    connect(ui->Key_I_Btn,&QToolButton::clicked,this,&UKeyBoard::slotKeyBtn);
    connect(ui->Key_O_Btn,&QToolButton::clicked,this,&UKeyBoard::slotKeyBtn);
    connect(ui->Key_P_Btn,&QToolButton::clicked,this,&UKeyBoard::slotKeyBtn);
    connect(ui->Key_A_Btn,&QToolButton::clicked,this,&UKeyBoard::slotKeyBtn);
    connect(ui->Key_S_Btn,&QToolButton::clicked,this,&UKeyBoard::slotKeyBtn);
    connect(ui->Key_D_Btn,&QToolButton::clicked,this,&UKeyBoard::slotKeyBtn);
    connect(ui->Key_F_Btn,&QToolButton::clicked,this,&UKeyBoard::slotKeyBtn);
    connect(ui->Key_G_Btn,&QToolButton::clicked,this,&UKeyBoard::slotKeyBtn);
    connect(ui->Key_H_Btn,&QToolButton::clicked,this,&UKeyBoard::slotKeyBtn);
    connect(ui->Key_J_Btn,&QToolButton::clicked,this,&UKeyBoard::slotKeyBtn);
    connect(ui->Key_K_Btn,&QToolButton::clicked,this,&UKeyBoard::slotKeyBtn);
    connect(ui->Key_L_Btn,&QToolButton::clicked,this,&UKeyBoard::slotKeyBtn);
    connect(ui->Key_Z_Btn,&QToolButton::clicked,this,&UKeyBoard::slotKeyBtn);
    connect(ui->Key_X_Btn,&QToolButton::clicked,this,&UKeyBoard::slotKeyBtn);
    connect(ui->Key_C_Btn,&QToolButton::clicked,this,&UKeyBoard::slotKeyBtn);
    connect(ui->Key_V_Btn,&QToolButton::clicked,this,&UKeyBoard::slotKeyBtn);
    connect(ui->Key_B_Btn,&QToolButton::clicked,this,&UKeyBoard::slotKeyBtn);
    connect(ui->Key_N_Btn,&QToolButton::clicked,this,&UKeyBoard::slotKeyBtn);
    connect(ui->Key_M_Btn,&QToolButton::clicked,this,&UKeyBoard::slotKeyBtn);

    connect(ui->wordBtn1,&QToolButton::clicked,this,&UKeyBoard::slotInputChange);
    connect(ui->wordBtn2,&QToolButton::clicked,this,&UKeyBoard::slotInputChange);
    connect(ui->wordBtn3,&QToolButton::clicked,this,&UKeyBoard::slotInputChange);
    connect(ui->wordBtn4,&QToolButton::clicked,this,&UKeyBoard::slotInputChange);
    connect(ui->wordBtn5,&QToolButton::clicked,this,&UKeyBoard::slotInputChange);
    connect(ui->wordBtn6,&QToolButton::clicked,this,&UKeyBoard::slotInputChange);
    connect(ui->wordBtn7,&QToolButton::clicked,this,&UKeyBoard::slotInputChange);
}
//输入中文
void UKeyBoard::slotInputChange()
{
    
    
    QToolButton* btn = (QToolButton*)sender();
    QString value = btn->text();
    QKeyEvent *key = new QKeyEvent(QEvent::KeyPress, 'w', Qt::NoModifier, value.split(" ").last());
    //通过postEvent将事件key的文本内容发送出去，QApplication::focusWidget()当前窗口中，有光标的控件上
    QApplication::postEvent(ui->inputEdit->focusWidget(), key); //_currentLineEdit

    m_curWords.clear();
    ui->selectWordEdit->setText("");
    ui->selectWordEdit->hide();
    ui->wordBtn1->setText("");
    ui->wordBtn2->setText("");
    ui->wordBtn3->setText("");
    ui->wordBtn4->setText("");
    ui->wordBtn5->setText("");
    ui->wordBtn6->setText("");
    ui->wordBtn7->setText("");
}
//上一页中文
void UKeyBoard::on_lastPageBtn_clicked()
{
    
    
    if (_index > 0)
        _index--;
    QString val = ui->selectWordEdit->text();
    wordChange(val,_index);
}
//下一页中文
void UKeyBoard::on_nextPageBtn_clicked()
{
    
    
    _index++;
    QString val = ui->selectWordEdit->text();
    if (wordChange(val,_index) < 0)
        _index--;
}
//按键输入
void UKeyBoard::slotKeyBtn()
{
    
    
    QToolButton* btn = (QToolButton*)sender();
    ui->inputEdit->setFocus();

    if (_keyType == 0)
    {
    
    
        QString val = ui->selectWordEdit->text();
        int position = ui->selectWordEdit->cursorPosition();
        val.insert(position,btn->text());
        ui->selectWordEdit->setText(val);
        m_curWords.clear();
        m_curWords.append(m_wordHash.value(val));
        for (QHash<QString,QStringList>::const_iterator it = m_wordHash.begin(); it != m_wordHash.end();it++) {
    
    
            if (it.key().indexOf(val) == 0)
            {
    
    
                if (it.key() == val)
                    continue;
                m_curWords.append(it.value());
            }
        }
        wordChange(val,0);
        updateSelectInputPos();
    }
    else
    {
    
    
        QString value = btn->text();
        QKeyEvent *key = new QKeyEvent(QEvent::KeyPress, 'w', Qt::NoModifier, value);
        //通过postEvent将事件key的文本内容发送出去，QApplication::focusWidget()当前窗口中，有光标的控件上
        QApplication::postEvent(ui->inputEdit->focusWidget(), key); //_currentLineEdit
    }

}
//更新编辑框大小和状态
void UKeyBoard::updateSelectInputPos()
{
    
    
    if (!ui->selectWordEdit->text().isEmpty())
    {
    
    
        ui->selectWordEdit->setFocus();
        ui->selectWordEdit->show();
        QFontMetrics _metrics(ui->inputEdit->font());
        QFontMetrics _metrics1(ui->selectWordEdit->font());
        QString inputVal = ui->inputEdit->text().mid(0,ui->inputEdit->cursorPosition());
        int inputPos = 5+_metrics.width(inputVal)+ui->inputEdit->x();
        ui->selectWordEdit->setGeometry(inputPos,ui->inputEdit->y()+3,_metrics1.width(ui->selectWordEdit->text())+6,36);
    }
    else
    {
    
    
        ui->inputEdit->setFocus();
        ui->selectWordEdit->clear();
        ui->selectWordEdit->hide();
    }
}
//中文检索
int UKeyBoard::wordChange(QString val,int index)
{
    
    
    _index = index;
    if (m_curWords.size() < 7*index)
        return -1;

    ui->wordBtn1->setText("");
    ui->wordBtn2->setText("");
    ui->wordBtn3->setText("");
    ui->wordBtn4->setText("");
    ui->wordBtn5->setText("");
    ui->wordBtn6->setText("");
    ui->wordBtn7->setText("");

    if (m_curWords.size()>7*index)
        ui->wordBtn1->setText("1 "+m_curWords[7*index]);
    if (m_curWords.size()>7*index+1)
        ui->wordBtn2->setText("2 "+m_curWords[7*index+1]);
    if (m_curWords.size()>7*index+2)
        ui->wordBtn3->setText("3 "+m_curWords[7*index+2]);
    if (m_curWords.size()>7*index+3)
        ui->wordBtn4->setText("4 "+m_curWords[7*index+3]);
    if (m_curWords.size()>7*index+4)
        ui->wordBtn5->setText("5 "+m_curWords[7*index+4]);
    if (m_curWords.size()>7*index+5)
        ui->wordBtn6->setText("6 "+m_curWords[7*index+5]);
    if (m_curWords.size()>7*index+6)
        ui->wordBtn7->setText("7 "+m_curWords[7*index+6]);
    return 0;
}
//大小写切换
void UKeyBoard::on_capsBtn_clicked()
{
    
    
    if (!_capsType)
        _capsType = true;
    else
        _capsType = false;
    if (_keyType == 1)
    {
    
    
        if (_capsType)
        {
    
    
            changeKeyType(2);
        }
        else
        {
    
    
            changeKeyType(1);
        }
    }
    else if (_keyType == 2)
    {
    
    
        if (_capsType)
        {
    
    
            changeKeyType(4);
        }
        else
        {
    
    
            changeKeyType(3);
        }
    }
    else if (_keyType == 0)
    {
    
    
        QString val = ui->inputEdit->text();
        int position = ui->inputEdit->cursorPosition();
        QString wordVal = ui->wordBtn1->text().split(" ").last();
        if (wordVal.isEmpty())
            wordVal = ui->selectWordEdit->text();
        val.insert(position,wordVal+",");
        ui->inputEdit->setText(val);
        ui->inputEdit->setCursorPosition(position+wordVal.size()+1);
    }
    ui->inputEdit->setFocus();
    ui->selectWordEdit->clear();
    ui->selectWordEdit->hide();
    ui->wordBtn1->setText("");
    ui->wordBtn2->setText("");
    ui->wordBtn3->setText("");
    ui->wordBtn4->setText("");
    ui->wordBtn5->setText("");
    ui->wordBtn6->setText("");
    ui->wordBtn7->setText("");
}
//删除字符
void UKeyBoard::on_delBtn_clicked()
{
    
    
    QString val = ui->selectWordEdit->text();

    if (!val.isEmpty())
    {
    
    
        int cursorPosition = ui->selectWordEdit->cursorPosition()-1;
        val.remove(cursorPosition,1);
        ui->selectWordEdit->setText(val);
        ui->selectWordEdit->setCursorPosition(cursorPosition);

        m_curWords.clear();
        m_curWords.append(m_wordHash.value(val));
        for (QHash<QString,QStringList>::const_iterator it = m_wordHash.begin(); it != m_wordHash.end();it++) {
    
    
            if (it.key().indexOf(val) == 0)
            {
    
    
                if (it.key() == val)
                    continue;
                m_curWords.append(it.value());
            }
        }

        wordChange(val,0);

        if (val.isEmpty())
        {
    
    
            ui->wordBtn1->setText("");
            ui->wordBtn2->setText("");
            ui->wordBtn3->setText("");
            ui->wordBtn4->setText("");
            ui->wordBtn5->setText("");
            ui->wordBtn6->setText("");
            ui->wordBtn7->setText("");
            ui->selectWordEdit->hide();
            ui->inputEdit->setFocus();
        }
    }
    else
    {
    
    
        val = ui->inputEdit->text();
        int cursorPosition = ui->inputEdit->cursorPosition()-1;
        val.remove(cursorPosition,1);
        ui->inputEdit->setText(val);
        ui->inputEdit->setCursorPosition(cursorPosition);
    }
    updateSelectInputPos();
}
//切换键盘类型
void UKeyBoard::on_swithBtn_clicked()
{
    
    
    if (_keyType == 0)
        _keyType = 1;
    else if (_keyType == 1)
        _keyType = 2;
    else if (_keyType == 2)
        _keyType = 0;

    _capsType = false;
    if (_keyType == 0)
    {
    
    
        changeKeyType(0);
        ui->swithBtn->setText("EN");
    }
    else if (_keyType == 1)
    {
    
    
        changeKeyType(1);
        ui->swithBtn->setText("123");
    }
    else
    {
    
    
        changeKeyType(3);
        ui->swithBtn->setText("CN");
    }

    ui->inputEdit->setFocus();
    ui->selectWordEdit->clear();
    ui->selectWordEdit->hide();
}
//空格
void UKeyBoard::on_spaceBtn_clicked()
{
    
    
    int position = ui->inputEdit->cursorPosition();
    QString val = ui->inputEdit->text();
    if (_keyType == 0)
    {
    
    
        QString wordVal = ui->wordBtn1->text().split(" ").last();
        if (wordVal.isEmpty())
            wordVal = ui->selectWordEdit->text();
        val.insert(position,wordVal+" ");
        ui->inputEdit->setText(val);
        ui->inputEdit->setCursorPosition(position+wordVal.size()+1);
    }
    else
    {
    
    
        val.insert(position," ");
        ui->inputEdit->setText(val);
        ui->inputEdit->setCursorPosition(position+1);
    }
    ui->inputEdit->setFocus();
    ui->selectWordEdit->clear();
    ui->selectWordEdit->hide();
    ui->wordBtn1->setText("");
    ui->wordBtn2->setText("");
    ui->wordBtn3->setText("");
    ui->wordBtn4->setText("");
    ui->wordBtn5->setText("");
    ui->wordBtn6->setText("");
    ui->wordBtn7->setText("");
}
//光标左移
void UKeyBoard::on_leftMoveBtn_clicked()
{
    
    
    if (ui->selectWordEdit->text().isEmpty())
    {
    
    
        if (ui->inputEdit->cursorPosition()-1 < 0)
            ui->inputEdit->setCursorPosition(ui->inputEdit->text().size());
        else
            ui->inputEdit->setCursorPosition(ui->inputEdit->cursorPosition()-1);
    }
    else
    {
    
    
        if (ui->selectWordEdit->cursorPosition()-1 < 0)
            ui->selectWordEdit->setCursorPosition(ui->selectWordEdit->text().size());
        else
            ui->selectWordEdit->setCursorPosition(ui->selectWordEdit->cursorPosition()-1);
    }
}

//光标右移
void UKeyBoard::on_rightMoveBtn_clicked()
{
    
    
    if (ui->selectWordEdit->text().isEmpty())
    {
    
    
        if (ui->inputEdit->cursorPosition()+1 > ui->inputEdit->text().size())
            ui->inputEdit->setCursorPosition(0);
        else
            ui->inputEdit->setCursorPosition(ui->inputEdit->cursorPosition()+1);
    }
    else
    {
    
    
        if (ui->selectWordEdit->cursorPosition()+1 > ui->selectWordEdit->text().size())
            ui->selectWordEdit->setCursorPosition(0);
        else
            ui->selectWordEdit->setCursorPosition(ui->selectWordEdit->cursorPosition()+1);
    }
}

void UKeyBoard::on_enterBtn_clicked()
{
    
    
    this->hide();
}

//切换键盘类型
void UKeyBoard::changeKeyType(int type)
{
    
    
    ui->selectWordEdit->setText("");
    ui->wordBtn1->setText("");
    ui->wordBtn2->setText("");
    ui->wordBtn3->setText("");
    ui->wordBtn4->setText("");
    ui->wordBtn5->setText("");
    ui->wordBtn6->setText("");
    ui->wordBtn7->setText("");

    if (type == 0)
    {
    
    
        _capsType = false;
        ui->Key_A_Btn->setText("a");
        ui->Key_S_Btn->setText("s");
        ui->Key_D_Btn->setText("d");
        ui->Key_F_Btn->setText("f");
        ui->Key_G_Btn->setText("g");
        ui->Key_H_Btn->setText("h");
        ui->Key_J_Btn->setText("j");
        ui->Key_K_Btn->setText("k");
        ui->Key_L_Btn->setText("l");
        ui->Key_Q_Btn->setText("q");
        ui->Key_W_Btn->setText("w");
        ui->Key_E_Btn->setText("e");
        ui->Key_R_Btn->setText("r");
        ui->Key_T_Btn->setText("t");
        ui->Key_Y_Btn->setText("y");
        ui->Key_U_Btn->setText("u");
        ui->Key_I_Btn->setText("i");
        ui->Key_O_Btn->setText("o");
        ui->Key_P_Btn->setText("p");
        ui->Key_Z_Btn->setText("z");
        ui->Key_X_Btn->setText("x");
        ui->Key_C_Btn->setText("c");
        ui->Key_V_Btn->setText("v");
        ui->Key_B_Btn->setText("b");
        ui->Key_N_Btn->setText("n");
        ui->Key_M_Btn->setText("m");
        ui->capsBtn->setIcon(QIcon());
        ui->capsBtn->setText(".");
    }
    else if (type == 1)
    {
    
    
        _capsType = false;
        ui->Key_A_Btn->setText("a");
        ui->Key_S_Btn->setText("s");
        ui->Key_D_Btn->setText("d");
        ui->Key_F_Btn->setText("f");
        ui->Key_G_Btn->setText("g");
        ui->Key_H_Btn->setText("h");
        ui->Key_J_Btn->setText("j");
        ui->Key_K_Btn->setText("k");
        ui->Key_L_Btn->setText("l");
        ui->Key_Q_Btn->setText("q");
        ui->Key_W_Btn->setText("w");
        ui->Key_E_Btn->setText("e");
        ui->Key_R_Btn->setText("r");
        ui->Key_T_Btn->setText("t");
        ui->Key_Y_Btn->setText("y");
        ui->Key_U_Btn->setText("u");
        ui->Key_I_Btn->setText("i");
        ui->Key_O_Btn->setText("o");
        ui->Key_P_Btn->setText("p");
        ui->Key_Z_Btn->setText("z");
        ui->Key_X_Btn->setText("x");
        ui->Key_C_Btn->setText("c");
        ui->Key_V_Btn->setText("v");
        ui->Key_B_Btn->setText("b");
        ui->Key_N_Btn->setText("n");
        ui->Key_M_Btn->setText("m");
        ui->capsBtn->setIcon(QIcon(":/img/keyboard-up_1.png"));
        ui->capsBtn->setIconSize(QSize(28,33));
        ui->capsBtn->setText("");
    }
    else if (type == 2)
    {
    
    
        ui->Key_A_Btn->setText("A");
        ui->Key_S_Btn->setText("S");
        ui->Key_D_Btn->setText("D");
        ui->Key_F_Btn->setText("F");
        ui->Key_G_Btn->setText("G");
        ui->Key_H_Btn->setText("H");
        ui->Key_J_Btn->setText("J");
        ui->Key_K_Btn->setText("K");
        ui->Key_L_Btn->setText("L");
        ui->Key_Q_Btn->setText("Q");
        ui->Key_W_Btn->setText("W");
        ui->Key_E_Btn->setText("E");
        ui->Key_R_Btn->setText("R");
        ui->Key_T_Btn->setText("T");
        ui->Key_Y_Btn->setText("Y");
        ui->Key_U_Btn->setText("U");
        ui->Key_I_Btn->setText("I");
        ui->Key_O_Btn->setText("O");
        ui->Key_P_Btn->setText("P");
        ui->Key_Z_Btn->setText("Z");
        ui->Key_X_Btn->setText("X");
        ui->Key_C_Btn->setText("C");
        ui->Key_V_Btn->setText("V");
        ui->Key_B_Btn->setText("B");
        ui->Key_N_Btn->setText("N");
        ui->Key_M_Btn->setText("M");
        ui->capsBtn->setIcon(QIcon(":/img/keyboard-up.png"));
        ui->capsBtn->setIconSize(QSize(28,33));
        ui->capsBtn->setText("");
    }
    else if (type == 3)
    {
    
    
        ui->Key_A_Btn->setText("-");
        ui->Key_S_Btn->setText("+");
        ui->Key_D_Btn->setText("=");
        ui->Key_F_Btn->setText("/");
        ui->Key_G_Btn->setText("\\");
        ui->Key_H_Btn->setText(";");
        ui->Key_J_Btn->setText("`");
        ui->Key_K_Btn->setText(",");
        ui->Key_L_Btn->setText(".");
        ui->Key_Q_Btn->setText("1");
        ui->Key_W_Btn->setText("2");
        ui->Key_E_Btn->setText("3");
        ui->Key_R_Btn->setText("4");
        ui->Key_T_Btn->setText("5");
        ui->Key_Y_Btn->setText("6");
        ui->Key_U_Btn->setText("7");
        ui->Key_I_Btn->setText("8");
        ui->Key_O_Btn->setText("9");
        ui->Key_P_Btn->setText("0");
        ui->Key_Z_Btn->setText("[");
        ui->Key_X_Btn->setText("]");
        ui->Key_C_Btn->setText("‘");
        ui->Key_V_Btn->setText("...");
        ui->Key_B_Btn->setText("￥");
        ui->Key_N_Btn->setText("。");
        ui->Key_M_Btn->setText("、");
        ui->capsBtn->setIcon(QIcon());
        ui->capsBtn->setText("#+=");
    }
    else if (type == 4)
    {
    
    
        ui->Key_A_Btn->setText("!");
        ui->Key_S_Btn->setText("@");
        ui->Key_D_Btn->setText("#");
        ui->Key_F_Btn->setText("$");
        ui->Key_G_Btn->setText("%");
        ui->Key_H_Btn->setText("^");
        ui->Key_J_Btn->setText("&");
        ui->Key_K_Btn->setText("*");
        ui->Key_L_Btn->setText("(");
        ui->Key_Q_Btn->setText(")");
        ui->Key_W_Btn->setText("_");
        ui->Key_E_Btn->setText("°");
        ui->Key_R_Btn->setText("{");
        ui->Key_T_Btn->setText("}");
        ui->Key_Y_Btn->setText("|");
        ui->Key_U_Btn->setText(":");
        ui->Key_I_Btn->setText("\"");
        ui->Key_O_Btn->setText("<");
        ui->Key_P_Btn->setText(">");
        ui->Key_Z_Btn->setText("?");
        ui->Key_X_Btn->setText("~");
        ui->Key_C_Btn->setText("”");
        ui->Key_V_Btn->setText("“");
        ui->Key_B_Btn->setText("《");
        ui->Key_N_Btn->setText("》");
        ui->Key_M_Btn->setText("—");
        ui->capsBtn->setIcon(QIcon());
        ui->capsBtn->setText("123");
    }
}

完整源码

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子集生成之增量构造法，位向量法，二进制法
ERROR: cmd.exe failed with args /c "/APK\gradle\rungradle.bat...
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