Qt自定义虚拟键盘，模拟Qt插件虚拟键盘（数字键盘+全键盘），支持大小写，中英文，适用Windows Linux。
三分糖丶去冰 2024-09-05 17:07:02 阅读 54
1.背景
Qt自带的虚拟键盘插件（qtvirtualkeyboard）不是很好用，界面大小、字体大小、界面位置不能任意调整等问题。
2.项目环境
Qt 5.12.3
Desktop Qt 5.12.3 MinGW 64-Bit
Windows10
3.项目效果
4.部分代码解析（以全键盘为例）
4.1按键分类（可有可无）
首先把想要的键盘样式跟按键布局好，键盘所有的按键均使用QPushButton，为了区分不同按钮的功能，减少后面按钮触发时的判断，用setProperty设置按钮属性。
<code>ui->;btnQ_1->setProperty("btnLetter", true);
...
ui->btnSpace->setProperty("btnSpace", true);
...
ui->btnAt_->setProperty("btnOther", true);
...
ui->btnEnter->setProperty("btnFunc", true);
...
ui->btnPageUp->setProperty("btnPage", true);
...
ui->btnSelect1->setProperty("btnSelect", true);
上面分成了六种不同的属性，其中包括字母、回退（比较特殊，就单独拎出来）、其他（区分标点符）、功能（切换大小写中英文），待选（中文会使用到），翻页（中文会使用到）。这个分类看个人喜好，因为在Linux设备上使用的时候还要触发不同音效，就分成这样了。
4.2绑定全部的按键信号
QList<QPushButton *>myBtn = this->findChildren<QPushButton *>();
foreach(QPushButton *btn, myBtn)
connect(btn, &QPushButton::clicked, this, &normalKeyboard::fBtnClick);
获取全部按键的clicked信号，绑定同一个槽函数，不管哪个按键触发，都在这个槽函数里面判断是哪一种按键功能。
4.3获取判断的条件
QObject *sender() const;
sender()是Qt信号与槽中比较重要的一个概念，它表示发射信号的对象，可以是任意QObjecr的派生类。如QPushButton,QLineEdit等。多个不同信号绑定的同一个槽函数时，它能在槽函数中帮我们快速找到发送的信号的对象来自哪个。
4.4绑定改变焦点的信号
connect(qApp, SIGNAL(focusChanged(QWidget *, QWidget *)), this, SLOT(fFocusChanged(QWidget *, QWidget *)));
Qt的<QApplication>提供了很多的全局信号，在程序的任何位置都可以接收处理，focusChanged是当系统焦点发生改变的时候，就会发出信号，这里可以用来获取触摸时需要输入的输入框。
4.5添加事件过滤器
bool normalKeyboard::eventFilter(QObject *watched, QEvent *event)
{
...
}
qApp->installEventFilter(this);
过滤器对象的 eventFilter()函数可以接受或拒绝拦截到的事件，若该函数返回 false, 则表示事件需要作进一步处理，此时事件会被发送到目标对象本身进行处理(注意： 这里并未向父对象进行传递)，若 evetnFilter()返回 true，则表示停止处理该事件，此时 目标对象和后面安装的事件过滤器 就无法获得该事件。
4.6改变键盘字体大小
void normalKeyboard::fChangeKeyboardFontSize(int fontSize)
{
QFont myFont(this->font().family(), fontSize);
QList<QPushButton *> myBtn = this->findChildren<QPushButton *>();
foreach (QPushButton * btn, myBtn)
{
btn->setFont(myFont);
}
ui->showPinyin->setFont(myFont);
}
4.7设置键盘的大小和位置
QPoint pos = QPoint();
this->setGeometry(pos.x(), pos.y(), width, height);
通过QPoint获取键盘界面的中心点，然后重新布局出键盘的位置和大小。它需要四个参数，分别是横坐标、纵坐标、宽度和高度。这样就可以实现在任意位置调出键盘了。
4.8设置为单例模式,保证一个程序只存在一个输入法实例对象
static normalKeyboard *Instance() {
if (!_instance) {
_instance = new normalKeyboard;
}
return _instance;
}
static normalKeyboard *_instance; //实例对象
4.9中文输入
当前的项目采用数据库查询的方式，虽然说不是很智能，输入的文字也不算全，但基本上满足日常使用了。
5.代码展示
讲了不少废话，还是贴源码吧！
5.1键盘部分
#ifndef NORMALKEYBOARD_H
#define NORMALKEYBOARD_H
#include <QWidget>
#include <QDesktopWidget>
#include <QLineEdit>
#include <QPushButton>
#include <QTimer>
#include <QPainter>
#include <QMouseEvent>
#include <QDebug>
#include "pinyinsql.h"
namespace Ui {
class normalKeyboard;
}
class normalKeyboard : public QWidget
{
Q_OBJECT
public:
explicit normalKeyboard(QWidget *parent = nullptr);
~normalKeyboard();
//单例模式,保证一个程序只存在一个输入法实例对象
static normalKeyboard *Instance() {
if (!_instance) {
_instance = new normalKeyboard;
}
return _instance;
}
void fNormalKeyboardInit();
void fBackspace();
void fInsertStr(QString str);
bool fCheakPressType();
void fChangeKeyboardFontSize(int fontSize);
void fResetKeyboardSize(QLineEdit *lineedit, QString style, int width, int high, int fontSize);
void fKeyboardPropertyInit();
void fChangeInputType(QString type);
void fShowChinese();
public slots:
void fBtnLongClick();
void fBtnClick();
void fFocusChanged(QWidget *, QWidget *);
protected:
bool eventFilter(QObject *watched, QEvent *event);
void mousePressEvent(QMouseEvent *e);
void mouseReleaseEvent(QMouseEvent *);
private slots:
void on_showPinyin_textChanged(const QString &arg1);
private:
Ui::normalKeyboard *ui;
static normalKeyboard *_instance; //实例对象
int g_DeskWidth, //桌面的宽
g_DeskHeight, //桌面的高
g_KeyboardWidth, //键盘的宽
g_KeyboardHeight, //键盘的高
g_CurrentChineseCount; //显示当前行第一个的下标
QLineEdit *p_CurrentLineEdit = nullptr; //当前聚焦的输入行
bool g_IsFirstClick, //是否首次加载
g_IsPressed, //是否长按退格
g_IsMousePressd;
QPushButton *p_LongPressedBtn = nullptr;//长按按钮
QTimer *p_LongPressTimer = nullptr; //长按定时器
QString g_CurrentFocusType; //当前焦点控件的类型
QString g_CurrentInputType; //当前输入法类型
QPoint g_MousePoint;
QStringList g_ChineseList;
QList <QPushButton *> g_SelectList;
};
#endif // NORMALKEYBOARD_H
#include "normalkeyboard.h"
#include "normalkeyboard.h"
#include "ui_normalkeyboard.h"
normalKeyboard::normalKeyboard(QWidget *parent) :
QWidget(parent),
ui(new Ui::normalKeyboard)
{
ui->setupUi(this);
this->setWindowFlags(Qt::Tool | Qt::WindowStaysOnTopHint | Qt::FramelessWindowHint);
fKeyboardPropertyInit();
fNormalKeyboardInit();
}
normalKeyboard::~normalKeyboard()
{
delete ui;
}
void normalKeyboard::fNormalKeyboardInit()
{
g_IsFirstClick = true;
g_CurrentChineseCount = 0;
g_IsPressed = false;
g_CurrentFocusType.clear();
g_CurrentInputType = "InputUpper"; //InputLower InputChinese InputNumber_C InputNumber_E
g_IsMousePressd = false;
fChangeInputType("InputUpper");
//获取桌面的宽高
QDesktopWidget myAppWidget;
g_DeskWidth = myAppWidget.availableGeometry().width();
g_DeskHeight = myAppWidget.availableGeometry().height();
p_LongPressTimer = new QTimer;
connect(p_LongPressTimer, &QTimer::timeout, this, &normalKeyboard::fBtnLongClick);
QList<QPushButton *>myBtn = this->findChildren<QPushButton *>();
foreach(QPushButton *btn, myBtn)
connect(btn, &QPushButton::clicked, this, &normalKeyboard::fBtnClick);
//绑定全部改变焦点的信号
connect(qApp, SIGNAL(focusChanged(QWidget *, QWidget *)), this, SLOT(fFocusChanged(QWidget *, QWidget *)));
qApp->installEventFilter(this);
}
void normalKeyboard::fKeyboardPropertyInit()
{
ui->btnQ_1->setProperty("btnLetter", true);
ui->btnW_2->setProperty("btnLetter", true);
ui->btnE_3->setProperty("btnLetter", true);
ui->btnR_4->setProperty("btnLetter", true);
ui->btnT_5->setProperty("btnLetter", true);
ui->btnY_6->setProperty("btnLetter", true);
ui->btnU_7->setProperty("btnLetter", true);
ui->btnI_8->setProperty("btnLetter", true);
ui->btnO_9->setProperty("btnLetter", true);
ui->btnP_0->setProperty("btnLetter", true);
ui->btnA_->setProperty("btnLetter", true);
ui->btnB_->setProperty("btnLetter", true);
ui->btnD_->setProperty("btnLetter", true);
ui->btnF_->setProperty("btnLetter", true);
ui->btnG_->setProperty("btnLetter", true);
ui->btnH_->setProperty("btnLetter", true);
ui->btnJ_->setProperty("btnLetter", true);
ui->btnK_->setProperty("btnLetter", true);
ui->btnL_->setProperty("btnLetter", true);
ui->btnZ_->setProperty("btnLetter", true);
ui->btnX_->setProperty("btnLetter", true);
ui->btnC_->setProperty("btnLetter", true);
ui->btnV_->setProperty("btnLetter", true);
ui->btnB_->setProperty("btnLetter", true);
ui->btnN_->setProperty("btnLetter", true);
ui->btnM_->setProperty("btnLetter", true);
ui->btnSpace->setProperty("btnSpace", true);
ui->btnAt_->setProperty("btnOther", true);
ui->btnPeriod->setProperty("btnOther", true);
ui->btnApostrophe->setProperty("btnOther", true);
ui->btnMinus->setProperty("btnOther", true);
ui->backspace->setProperty("btnOther", true);
ui->btnShiftLeft->setProperty("btnFunc", true);
ui->btnSymbol->setProperty("btnFunc", true);
ui->btnLanguage->setProperty("btnFunc", true);
ui->btnShiftRight->setProperty("btnFunc", true);
ui->btnEnter->setProperty("btnFunc", true);
ui->btnPageUp->setProperty("btnPage", true);
ui->btnPageDown->setProperty("btnPage", true);
g_SelectList << ui->btnSelect1 << ui->btnSelect2 << ui->btnSelect3 << ui->btnSelect4 << ui->btnSelect5
<< ui->btnSelect6 << ui->btnSelect7 << ui->btnSelect8 << ui->btnSelect9;
ui->btnSelect1->setProperty("btnSelect", true);
ui->btnSelect2->setProperty("btnSelect", true);
ui->btnSelect3->setProperty("btnSelect", true);
ui->btnSelect4->setProperty("btnSelect", true);
ui->btnSelect5->setProperty("btnSelect", true);
ui->btnSelect6->setProperty("btnSelect", true);
ui->btnSelect7->setProperty("btnSelect", true);
ui->btnSelect8->setProperty("btnSelect", true);
ui->btnSelect9->setProperty("btnSelect", true);
}
//焦点改变
void normalKeyboard::fFocusChanged(QWidget *p_PreceWidget, QWidget *p_CurrentWidget)
{
if(p_CurrentWidget != nullptr && !this->isAncestorOf(p_CurrentWidget))
{
#ifndef __arm__
if (p_PreceWidget == 0 && !g_IsFirstClick)
return;
#endif
g_IsFirstClick = false;
QWidget *p_ModalWidget = QApplication::activeModalWidget();
QWidget *p_PopupWidget = QApplication::activePopupWidget();
QWidget *p_Widget = QApplication::activeWindow();
/*
Qt::NonModal 非模态对话框
Qt::WindowModal 窗口级模态对话框，即只会阻塞父窗口、父窗口的父窗口及兄弟窗口。（半模态对话框）
Qt::ApplicationModal 应用程序级模态对话框，即会阻塞整个应用程序的所有窗口。（半模态对话框）
*/
if(p_ModalWidget !=nullptr && p_ModalWidget->inherits("QDialog"))
{
Qt::WindowModality Modality = p_ModalWidget->windowModality();
if(Qt::ApplicationModal == Modality)
{
p_CurrentLineEdit = nullptr;
g_CurrentFocusType.clear();
g_CurrentInputType = "InputUpper";
fChangeInputType(g_CurrentInputType);
this->setVisible(false);
return;
}
}
if(p_CurrentWidget->inherits("QLineEdit"))
{
p_CurrentLineEdit = (QLineEdit *) p_CurrentWidget;
g_CurrentFocusType = "QLineEdit";
}
else
{
p_CurrentLineEdit = nullptr;
g_CurrentFocusType.clear();
g_CurrentInputType = "InputUpper";
fChangeInputType(g_CurrentInputType);
this->setVisible(false);
}
}
}
void normalKeyboard::mousePressEvent(QMouseEvent *e)
{
if (e->button() == Qt::LeftButton)
{
g_IsMousePressd = true;
g_MousePoint = e->globalPos() - this->pos();
e->accept();
}
}
void normalKeyboard::mouseReleaseEvent(QMouseEvent *)
{
g_IsMousePressd = false;
}
//事件过滤器
bool normalKeyboard::eventFilter(QObject *watched, QEvent *event)
{
if(event->type() == QEvent::MouseButtonPress)
{
if(!g_CurrentFocusType.isEmpty() && watched != ui->btn_keyboard_close)
{
}
p_LongPressedBtn = (QPushButton *)watched;
if(fCheakPressType())
{
g_IsPressed = true;
p_LongPressTimer->start(500);
}
return false;
}
else if(event->type() == QEvent::MouseButtonRelease)
{
p_LongPressedBtn = (QPushButton *)watched;
if(fCheakPressType())
{
g_IsPressed = true;
p_LongPressTimer->stop();
}
return false;
}
else if(event->type() == QEvent::KeyPress)
{
if(!isVisible())
return QWidget::eventFilter(watched, event);
QString myStr;
QList<QPushButton *>myBtn = this->findChildren<QPushButton *>();
foreach(QPushButton *btn, myBtn)
{
if(btn->text() == myStr)
{
btn->click();
return true;
}
}
return false;
}
return QWidget::eventFilter(watched, event);
}
bool normalKeyboard::fCheakPressType()
{
//只有属于输入法键盘的合法按钮才继续处理
if (p_LongPressedBtn->property("btnLetter").toBool() || p_LongPressedBtn->property("btnOther").toBool())
return true;
else
return false;
}
//点击
void normalKeyboard::fBtnClick()
{
if(g_CurrentFocusType == "")
return;
else
{
QPushButton *myBtn = (QPushButton *)sender();
QString objectName = myBtn->objectName();
if(objectName == "btn_backspace")
fBackspace();
else if(objectName == "btn_keyboard_close")
{
this->setVisible(false);
}
else if(objectName == "btnF_")
{
if (g_CurrentInputType == "InputNumber_E" || g_CurrentInputType == "InputNumber_C")
{
fInsertStr("&");
}
else
{
fInsertStr(ui->btnF_->text());
}
}
else if (objectName == "btnShiftRight" || objectName == "btnShiftLeft")
{
if (g_CurrentInputType == "InputUpper")
{
g_CurrentInputType = "InputLower";
}
else if (g_CurrentInputType == "InputLower")
{
g_CurrentInputType = "InputUpper";
}
fChangeInputType(g_CurrentInputType);
}
else if (objectName == "btnLanguage")
{
if (g_CurrentInputType == "InputChinese")
{
g_CurrentInputType = "InputUpper";
}
else if (g_CurrentInputType == "InputNumber_C")
{
g_CurrentInputType = "InputNumber_E";
}
else if (g_CurrentInputType == "InputNumber_E")
{
g_CurrentInputType = "InputNumber_C";
}
else if (g_CurrentInputType == "InputUpper" || g_CurrentInputType == "InputLower")
{
g_CurrentInputType = "InputChinese";
}
fChangeInputType(g_CurrentInputType);
}
else if (objectName == "btnSymbol")
{
if (g_CurrentInputType == "InputChinese")
{
g_CurrentInputType = "InputNumber_C";
}
else if (g_CurrentInputType == "InputUpper" || g_CurrentInputType == "InputLower")
{
g_CurrentInputType = "InputNumber_E";
}
else if (g_CurrentInputType == "InputNumber_E" || g_CurrentInputType == "InputNumber_C")
{
g_CurrentInputType = "InputUpper";
}
fChangeInputType(g_CurrentInputType);
}
else if (objectName == "backspace")
{
//如果当前是中文模式,则删除对应拼音,删除完拼音之后再删除对应文本输入框的内容
if (g_CurrentInputType == "InputChinese")
{
QString pinyin = ui->showPinyin->text();
int len = pinyin.length();
if (len > 0)
ui->showPinyin->setText(pinyin.left(len - 1));
else
fBackspace();
}
else
fBackspace();
}
else if (objectName == "btnPageUp" || objectName == "btnPageDown")
{
//中文模式才能翻页
if(objectName == "btnPageUp")
{
if(g_ChineseList.count() >= 9 && g_CurrentChineseCount >= 9 )
g_CurrentChineseCount -= 9;
}
else
{
if(g_ChineseList.count() > 9 && g_CurrentChineseCount < g_ChineseList.count() - 9)
g_CurrentChineseCount += 9;
}
//清空待选按钮
for(int i = 0; i < 9; i++)
{
g_SelectList.at(i)->setText("");
}
fShowChinese();
}
else if (objectName == "btnSpace")
{
if(g_CurrentInputType == "InputChinese")
{
if (ui->btnSelect1->text() != "")
{
fInsertStr(ui->btnSelect1->text());
ui->showPinyin->clear();
}
else
fInsertStr(" ");
}
else
fInsertStr(" ");
}
else if (objectName == "btnEnter")
{
if(g_CurrentInputType == "InputChinese")
{
if (ui->btnSelect1->text() != "")
{
fInsertStr(ui->btnSelect1->text());
ui->showPinyin->clear();
}
}
}
else
{
if(g_CurrentInputType == "InputChinese")
{
if(myBtn->property("btnSelect").toBool())
{
QString myStr = myBtn->text();
fInsertStr(myStr);
ui->showPinyin->setText("");
}
else if (myBtn->property("btnOther").toBool())
{
QString myStr = myBtn->text();
fInsertStr(myStr);
}
else
{
QString myStr = myBtn->text();
ui->showPinyin->insert(myStr);
}
}
else
{
QString myStr = myBtn->text();
fInsertStr(myStr);
}
}
}
}
//插入
void normalKeyboard::fInsertStr(QString str)
{
if (g_CurrentFocusType == "QLineEdit")
p_CurrentLineEdit->insert(str);
}
//退格
void normalKeyboard::fBackspace()
{
if (g_CurrentFocusType == "QLineEdit")
p_CurrentLineEdit->backspace();
}
//长按
void normalKeyboard::fBtnLongClick()
{
if (g_IsPressed) {
p_LongPressTimer->setInterval(30); //设置间隔时间
p_LongPressedBtn->click();
}
}
//改变字体大小
void normalKeyboard::fChangeKeyboardFontSize(int fontSize)
{
QFont myFont(this->font().family(), fontSize);
QList<QPushButton *> myBtn = this->findChildren<QPushButton *>();
foreach (QPushButton * btn, myBtn)
{
btn->setFont(myFont);
}
ui->showPinyin->setFont(myFont);
}
//设置键盘的大小和位置(当前点击的lineedit,键盘的位置，键盘的宽度，键盘的高度，键盘中pushbutton的大小)
void normalKeyboard::fResetKeyboardSize(QLineEdit *lineedit, QString style, int width, int height, int fontSize)
{
//qDebug() << "numberKeyboard fResetKeyboardSize" << g_DeskWidth << g_DeskHeight;
fChangeKeyboardFontSize(fontSize);
QSize myIconSize(height/6, height/6);
ui->btnShiftLeft->setIconSize(myIconSize);
ui->btnShiftRight->setIconSize(myIconSize);
ui->backspace->setIconSize(myIconSize);
ui->btn_keyboard_close->setIconSize(myIconSize);
ui->btnLanguage->setIconSize(myIconSize);
ui->btnEnter->setIconSize(myIconSize);
//根据用户选择的输入法位置设置-居中显示-底部填充-显示在输入框正下方等方式
if (style == "center")
{
QPoint pos = QPoint(g_DeskWidth/2 - width/2, g_DeskHeight/2 - height/2);
this->setGeometry(pos.x(), pos.y(), width, height);
}
else if (style == "bottom")
{
this->setGeometry(0, g_DeskHeight - height, g_DeskWidth, height);
}
else if (style == "leftdown")
{
QRect rect = lineedit->rect();
QPoint pos = QPoint(rect.left(), rect.bottom() + 2);
pos = lineedit->mapToGlobal(pos);//将窗口坐标转换成桌面坐标
this->setGeometry(pos.x(), pos.y(), width, height);
}
else if (style == "leftup")
{
QRect rect = lineedit->rect();
QPoint pos = QPoint(rect.left(), rect.top()- height - 2);
pos = lineedit->mapToGlobal(pos);
this->setGeometry(pos.x(), pos.y(), width, height);
}
else if (style == "rightup")
{
QRect rect = lineedit->rect();
QPoint pos = QPoint(rect.right() - width, rect.top() - height - 2);
pos = lineedit->mapToGlobal(pos);
this->setGeometry(pos.x(), pos.y(), width, height);
}
else if (style == "rightdown")
{
QRect rect = lineedit->rect();
QPoint pos = QPoint(rect.right() - width, rect.bottom() + 2);
pos = lineedit->mapToGlobal(pos);
this->setGeometry(pos.x(), pos.y(), width, height);
}
}
//改变键盘类型
void normalKeyboard::fChangeInputType(QString type)
{
g_ChineseList.clear();
if (type == "InputUpper")
{
ui->selectWidget->hide();
ui->btnA_->setText("A");
ui->btnB_->setText("B");
ui->btnC_->setText("C");
ui->btnD_->setText("D");
ui->btnE_3->setText("E");
ui->btnF_->setText("F");
ui->btnG_->setText("G");
ui->btnH_->setText("H");
ui->btnI_8->setText("I");
ui->btnJ_->setText("J");
ui->btnK_->setText("K");
ui->btnL_->setText("L");
ui->btnM_->setText("M");
ui->btnN_->setText("N");
ui->btnO_9->setText("O");
ui->btnP_0->setText("P");
ui->btnQ_1->setText("Q");
ui->btnR_4->setText("R");
ui->btnS_->setText("S");
ui->btnT_5->setText("T");
ui->btnU_7->setText("U");
ui->btnV_->setText("V");
ui->btnW_2->setText("W");
ui->btnX_->setText("X");
ui->btnY_6->setText("Y");
ui->btnZ_->setText("Z");
ui->btnAt_->setText("@");
ui->btnPeriod->setText(".");
ui->btnApostrophe->setText("'");
ui->btnMinus->setText("-");
ui->btnSpace->setText(tr("English"));
ui->btnShiftLeft->setEnabled(true);
ui->btnShiftRight->setEnabled(true);
ui->btnShiftLeft->setIcon(QPixmap(":/images/shift_checked.png"));
ui->btnShiftRight->setIcon(QPixmap(":/images/shift_checked.png"));
}
else if (type == "InputLower")
{
ui->selectWidget->hide();
ui->btnA_->setText("a");
ui->btnB_->setText("b");
ui->btnC_->setText("c");
ui->btnD_->setText("d");
ui->btnE_3->setText("e");
ui->btnF_->setText("f");
ui->btnG_->setText("g");
ui->btnH_->setText("h");
ui->btnI_8->setText("i");
ui->btnJ_->setText("j");
ui->btnK_->setText("k");
ui->btnL_->setText("l");
ui->btnM_->setText("m");
ui->btnN_->setText("n");
ui->btnO_9->setText("o");
ui->btnP_0->setText("p");
ui->btnQ_1->setText("q");
ui->btnR_4->setText("r");
ui->btnS_->setText("s");
ui->btnT_5->setText("t");
ui->btnU_7->setText("u");
ui->btnV_->setText("v");
ui->btnW_2->setText("w");
ui->btnX_->setText("x");
ui->btnY_6->setText("y");
ui->btnZ_->setText("z");
ui->btnAt_->setText("@");
ui->btnPeriod->setText(".");
ui->btnApostrophe->setText("'");
ui->btnMinus->setText("-");
ui->btnSpace->setText(tr("English"));
ui->btnShiftLeft->setEnabled(true);
ui->btnShiftRight->setEnabled(true);
ui->btnShiftLeft->setIcon(QPixmap(":/images/shift_double_checked.png"));
ui->btnShiftRight->setIcon(QPixmap(":/images/shift_double_checked.png"));
}
else if (type == "InputChinese")
{
ui->selectWidget->show();
ui->btnA_->setText("a");
ui->btnB_->setText("b");
ui->btnC_->setText("c");
ui->btnD_->setText("d");
ui->btnE_3->setText("e");
ui->btnF_->setText("f");
ui->btnG_->setText("g");
ui->btnH_->setText("h");
ui->btnI_8->setText("i");
ui->btnJ_->setText("j");
ui->btnK_->setText("k");
ui->btnL_->setText("l");
ui->btnM_->setText("m");
ui->btnN_->setText("n");
ui->btnO_9->setText("o");
ui->btnP_0->setText("p");
ui->btnQ_1->setText("q");
ui->btnR_4->setText("r");
ui->btnS_->setText("s");
ui->btnT_5->setText("t");
ui->btnU_7->setText("u");
ui->btnV_->setText("v");
ui->btnW_2->setText("w");
ui->btnX_->setText("x");
ui->btnY_6->setText("y");
ui->btnZ_->setText("z");
ui->btnAt_->setText("@");
ui->btnPeriod->setText("。");
ui->btnApostrophe->setText("’");
ui->btnMinus->setText("-");
ui->btnSpace->setText(tr("中文"));
ui->btnShiftLeft->setEnabled(false);
ui->btnShiftRight->setEnabled(false);
ui->btnShiftLeft->setIcon(QPixmap(":/images/shift.png"));
ui->btnShiftRight->setIcon(QPixmap(":/images/shift.png"));
}
else if (type == "InputNumber_E")
{
ui->selectWidget->hide();
ui->btnA_->setText("@");
ui->btnB_->setText(",");
ui->btnC_->setText("<");
ui->btnD_->setText("%");
ui->btnE_3->setText("3");
ui->btnF_->setText("&&");
ui->btnG_->setText("*");
ui->btnH_->setText("-");
ui->btnI_8->setText("8");
ui->btnJ_->setText("+");
ui->btnK_->setText("(");
ui->btnL_->setText(")");
ui->btnM_->setText(";");
ui->btnN_->setText(":");
ui->btnO_9->setText("9");
ui->btnP_0->setText("0");
ui->btnQ_1->setText("1");
ui->btnR_4->setText("4");
ui->btnS_->setText("#");
ui->btnT_5->setText("5");
ui->btnU_7->setText("7");
ui->btnV_->setText(">");
ui->btnW_2->setText("2");
ui->btnX_->setText("\"");
ui->btnY_6->setText("6");
ui->btnZ_->setText("!");
ui->btnAt_->setText("@");
ui->btnPeriod->setText(".");
ui->btnApostrophe->setText("'");
ui->btnMinus->setText("-");
ui->btnSpace->setText(tr("English"));
ui->btnShiftLeft->setEnabled(false);
ui->btnShiftRight->setEnabled(false);
ui->btnShiftLeft->setIcon(QPixmap(":/images/shift.png"));
ui->btnShiftRight->setIcon(QPixmap(":/images/shift.png"));
}
else if (type == "InputNumber_C")
{
ui->selectWidget->hide();
ui->btnA_->setText("@");
ui->btnB_->setText("，");
ui->btnC_->setText("《");
ui->btnD_->setText("%");
ui->btnE_3->setText("3");
ui->btnF_->setText(tr("&&"));
ui->btnG_->setText("*");
ui->btnH_->setText("_");
ui->btnI_8->setText("8");
ui->btnJ_->setText("+");
ui->btnK_->setText("（");
ui->btnL_->setText("）");
ui->btnM_->setText("；");
ui->btnN_->setText("：");
ui->btnO_9->setText("9");
ui->btnP_0->setText("0");
ui->btnQ_1->setText("1");
ui->btnR_4->setText("4");
ui->btnS_->setText("#");
ui->btnT_5->setText("5");
ui->btnU_7->setText("7");
ui->btnV_->setText("》");
ui->btnW_2->setText("2");
ui->btnX_->setText("”");
ui->btnY_6->setText("6");
ui->btnZ_->setText("！");
ui->btnAt_->setText("@");
ui->btnPeriod->setText("。");
ui->btnApostrophe->setText("’");
ui->btnMinus->setText("@v@");
ui->btnSpace->setText(tr("中文"));
ui->btnShiftLeft->setEnabled(false);
ui->btnShiftRight->setEnabled(false);
ui->btnShiftLeft->setIcon(QPixmap(":/images/shift.png"));
ui->btnShiftRight->setIcon(QPixmap(":/images/shift.png"));
}
ui->showPinyin->clear();
}
void normalKeyboard::on_showPinyin_textChanged(const QString &arg1)
{
//qDebug() << "normalKeyboard on_showPinyin_textChanged" << arg1;
g_CurrentChineseCount = 0;
PinyinSql mypinyin;
g_ChineseList.clear();
for(int i = 0; i < 9; i++)
{
g_SelectList.at(i)->setText("");
}
mypinyin.fOpenPinyinSql("./hKeyboard/pinyin.db");
g_ChineseList = mypinyin.fSearchPinyinData(arg1);
mypinyin.fCloseSql();
fShowChinese();
}
void normalKeyboard::fShowChinese()
{
int j = 0;
for(int i = g_CurrentChineseCount; i < g_ChineseList.count(); i++)
{
if(j < 9)
{
g_SelectList.at(j)->setText(g_ChineseList.at(i));
j++;
}
}
}
5.2数据库部分
#ifndef PINYINSQL_H
#define PINYINSQL_H
#include <QObject>
#include <QSqlDatabase>
#include <QtSql>
#include <QSqlError>
#include <QSqlQuery>
#include <QDebug>
#include <QStringList>
class PinyinSql : public QObject
{
Q_OBJECT
public:
explicit PinyinSql(QObject *parent = nullptr);
bool fOpenPinyinSql(QString sqlName);
void fCloseSql();
QStringList fSearchPinyinData(QString);
private:
QSqlDatabase g_PinyinSqlDB;
};
#endif // PINYINSQL_H
#include "pinyinsql.h"
PinyinSql::PinyinSql(QObject *parent) : QObject(parent)
{
}
//打开数据库文件
bool PinyinSql::fOpenPinyinSql(QString sqlName)
{
if(QSqlDatabase::contains("qt_sql_default_connection"))
g_PinyinSqlDB = QSqlDatabase::database("qt_sql_default_connection");
else
g_PinyinSqlDB = QSqlDatabase::addDatabase("QSQLITE");
g_PinyinSqlDB.setDatabaseName(sqlName);
if(g_PinyinSqlDB.open())
{
//qDebug() << "hSql fOpenSql open sql succed!" << sqlName;
return true;
}
else
{
//qDebug() << "hSql fOpenSql open sql failed!" << sqlName;
return false;
}
}
//关闭数据库
void PinyinSql::fCloseSql()
{
g_PinyinSqlDB.close();
}
//搜索拼音对应的汉字
QStringList PinyinSql::fSearchPinyinData(QString pinyin)
{
QStringList resultList;
QSqlQuery myQuery;
QString myStr = QString("select word from zhcn where py == '%1' order by id asc;").arg(pinyin);
bool isSuccess = myQuery.exec(myStr);
if(isSuccess)
{
while (myQuery.next())
{
resultList << myQuery.value(0).toString();
}
}
resultList.removeDuplicates();
//qDebug() << "PinyinSql fSearchPinyinData resultList:" << resultList;
return resultList;
}
6.Demo下载
文中所涉及的源工程已上传，请有需要移步下载https://download.csdn.net/download/m0_56573550/89446913。
以上程序可能存在纰漏，实现功能也不尽完善。期待和大家一起学习交流，共同进步。
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