需求

  1. 全屏软键盘；
  2. 输入英文；
  3. 输入中文；
  4. 支持触摸、键盘和输入混合输入；
  5. 目前有黑色系皮肤；
  6. Qt4和Qt5区分2个版本；

Demo：Qt5

  
  
  
  CSDN(粉丝免积分下载)：https://download.csdn.net/download/qq21497936/13945327
  QQ群：1047134658（点击“文件”搜索“softKeyboard”，群内与博文同步更新）

Demo：Qt4

  移植到MCGS嵌入式工控机上
  
  

V1.0.0

Demo代码

  可视化的布局，以便于定制修改，所见即所得：
  
KeyBoardWidget.h

#ifndef KEYBOARDWIDGET_H
#define KEYBOARDWIDGET_H

#include <QWidget>
#include <QPushButton>
#include <QLabel>

namespace Ui {
class KeyBoardWidget;
}

class KeyBoardWidget : public QWidget
{
Q_OBJECT
private:
enum INPUT_MODE {
INPUT_MODE_ZH = 0x01,
INPUT_MODE_EN,
INPUT_MODE_SYMB,
};

public:
explicit KeyBoardWidget(QWidget *parent = 0);
~KeyBoardWidget();

public:
void clearChineseCache();
void setKeyPressEvent(QKeyEvent *event);

signals:
void signal_sendKeyToFocusItem(QString keyText);

protected:
void updateChineseCharactersButtonState();
void switchLanguage(int inputMode);
void searchChineseCharacters(int currentpage);

protected slots:
void slot_characterButtonsClicked();
void slot_switchLanguage();
void slot_backspace();
void slot_blankspace();
void slot_chineseCharacterSelected();
void slot_chineseCharacterPrevious();
void slot_chineseCharacterNext();
void slot_enter();
void slot_upper();
void slot_symbols();
void slot_emoji();
void slot_hideKeyboard();

protected:
void updateKeyboard();

protected:
void mousePressEvent(QMouseEvent *event);
void mouseReleaseEvent(QMouseEvent *event);
void mouseMoveEvent(QMouseEvent *event);
void showEvent(QShowEvent *event);
void hideEvent(QHideEvent *event);

private:
Ui::KeyBoardWidget *ui;

private:
QList<QPushButton*> _listCharacterBtns;
QList<QPushButton*> _listChineseCharactersBtns;
INPUT_MODE _currentMode;
INPUT_MODE _lastMode;
bool _upperMode;
int _symbolPage;

QFont _font;

private:
static QString _strKey
56c
boradCharacters;
static QString _strKeyBoradSymbols[];
};

#endif // KEYBOARDWIDGET_H

KeyBoardWidget.cpp

#include "KeyBoardWidget.h"
#include "ui_KeyBoardWidget.h"
#include <QLabel>
#include <QPushButton>
#include <QVBoxLayout>
#include <QHBoxLayout>
#include <QFontDatabase>
#include <QFile>
#include <QApplication>
#include <QMouseEvent>
#include <QDebug>
#include <QDesktopWidget>

...

KeyBoardWidget::KeyBoardWidget(QWidget *parent) :
QWidget(parent),
ui(new Ui::KeyBoardWidget),
_currentMode(INPUT_MODE_EN),
_upperMode(false),
_symbolPage(0)
{
ui->setupUi(this);

this->setFixedSize(qApp->desktop()->width(), 380);

//设置主窗体样式
setWindowFlags(windowFlags()
| Qt::Tool
| Qt::FramelessWindowHint
| Qt::WindowStaysOnTopHint
| Qt::WindowDoesNotAcceptFocus);

//图标字体
int fontId = QFontDatabase::addApplicationFont(":/font/res/FontAwesome.otf");
QString fontName = QFontDatabase::applicationFontFamilies(fontId).at(0);
_font.setFamily(fontName);
_font.setPixelSize(24);

// 中文汉字按键存入列表
_listChineseCharactersBtns.append(
56c
ui->pushButton_r1);
_listChineseCharactersBtns.append(ui->pushButton_r2);
_listChineseCharactersBtns.append(ui->pushButton_r3);
_listChineseCharactersBtns.append(ui->pushButton_r4);
_listChineseCharactersBtns.append(ui->pushButton_r5);
for(int index = 0; index < _listChineseCharactersBtns.size(); index++)
{
connect(_listChineseCharactersBtns.at(index), SIGNAL(clicked(bool)), this, SLOT(slot_chineseCharacterSelected()));
}
// 翻页按键
ui->pushButton_prev->setFont(_font);
ui->pushButton_prev->setText(QString(QChar(0xf0d9)));
connect(ui->pushButton_prev, SIGNAL(clicked(bool)), this, SLOT(slot_chineseCharacterPrevious()));
ui->pushButton_next->setFont(_font);
ui->pushButton_next->setText(QString(QChar(0xf0da)));
connect(ui->pushButton_next, SIGNAL(clicked(bool)), this, SLOT(slot_chineseCharacterNext()));
// 字符按键存入列表
_listCharacterBtns.append(ui->pushButton_c1);
_listCharacterBtns.append(ui->pushButton_c2);
_listCharacterBtns.append(ui->pushButton_c3);
_listCharacterBtns.append(ui->pushButton_c4);
_listCharacterBtns.append(ui->pushButton_c5);
_listCharacterBtns.append(ui->pushButton_c6);
_listCharacterBtns.append(ui->pushButton_c7);
_listCharacterBtns.append(ui->pushButton_c8);

ad0
_listCharacterBtns.append(ui->pushButton_c9);
_listCharacterBtns.append(ui->pushButton_c10);
_listCharacterBtns.append(ui->pushButton_c11);
_listCharacterBtns.append(ui->pushButton_c12);
_listCharacterBtns.append(ui->pushButton_c13);
_listCharacterBtns.append(ui->pushButton_c14);
_listCharacterBtns.append(ui->pushButton_c15);
_listCharacterBtns.append(ui->pushButton_c16);
_listCharacterBtns.append(ui->pushButton_c17);
_listCharacterBtns.append(ui->pushButton_c18);
_listCharacterBtns.append(ui->pushButton_c19);
_listCharacterBtns.append(ui->pushButton_c20);
_listCharacterBtns.append(ui->pushButton_c21);
_listCharacterBtns.append(ui->pushButton_c22);
_listCharacterBtns.append(ui->pushButton_c23);
_listCharacterBtns.append(ui->pushButton_c24);
_listCharacterBtns.append(ui->pushButton_c25);
_listCharacterBtns.append(ui->pushButton_c26);
_listCharacterBtns.append(ui->pushButton_c27);
_listCharacterBtns.append(ui->pushButton_c28);
_listCharacterBtns.append(ui->pushButton_c29);
for(int index = 0; index < _strKeyboradCharacters.size(); index++)
{
_listCharacterBtns.at(index)->setText(_strKeyboradCharacters.at(index));
connect(_listCharacterBtns.at(index), SIGNAL(clicked(bool)),
this, SLOT(slot_characterButtonsClicked()));
}
// 功能键：回退
ui->pushButton_backspace->setText(QChar(0xf060));
ui->pushButton_backspace->setFont(_font);
connect(ui->pushButton_backspace, SIGNAL(clicked(bool)), this, SLOT(slot_backspace()));
// 功能键：大小写
ui->pushButton_upper->setFont(_font);
ui->pushButton_upper->setText(QChar(0xf062));
connect(ui->pushButton_upper, SIGNAL(clicked(bool)), this, SLOT(slot_upper()));
// 功能键：回车
ui->pushButton_enter->setFont(_font);
ui->pushButton_enter->setText("Enter");
connect(ui->pushButton_enter, SIGNAL(clicked(bool)), this, SLOT(slot_enter()));
// 功能键：切换符号
ui->pushButton_symbol->setText(".?123");
connect(ui->pushButton_symbol, SIGNAL(clicked(bool)), this, SLOT(slot_symbols()));
// 功能键：语言切换
ui->pushButton_language->setText("English");
connect(ui->pushButton_language, SIGNAL(clicked(bool)), this, SLOT(slot_switchLanguage()));
// 功能键：空格
ui->pushButton_blankspace->setText("");
connect(ui->pushButton_blankspace, SIGNAL(clicked(bool)), this, SLOT(slot_blankspace()));
// 功能键：表情
ui->pushButton_emoji->setFont(_font);
ui->pushButton_emoji->setText(QChar(0xf118));
connect(u
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i->pushButton_emoji, SIGNAL(clicked(bool)), this, SLOT(slot_emoji()));
// 功能键：隐藏
ui->pushButton_hideKeyboard->setFont(_font);
ui->pushButton_hideKeyboard->setText(QString(QChar(0xf11c)).append(QChar(0xf103)));
connect(ui->pushButton_hideKeyboard, SIGNAL(clicked(bool)), this, SLOT(slot_hideKeyboard()));

updateChineseCharactersButtonState();
}

KeyBoardWidget::~KeyBoardWidget()
{
delete ui;
}
...
void KeyBoardWidget::setKeyPressEvent(QKeyEvent *event)
{
if(_currentMode == INPUT_MODE_SYMB
&& _symbolPage == 0)
{
switch (event->key())
{
case Qt::Key_1:
_listCharacterBtns.at(0)->click();
break;
case Qt::Key_2:
_listCharacterBtns.at(1)->click();
break;
case Qt::Key_3:
_listCharacterBtns.at(2)->click();
break;
case Qt::Key_4:
_listCharacterBtns.at(3)->click();
break;
case Qt::Key_5:
_listCharacterBtns.at(4)->click();
break;
case Qt::Key_6:
_listCharacterBtns.at(5)->click();
break;
case Qt::Key_7:
_listCharacterBtns.at(6)->click();
break;
case Qt::Key_8:
_listCharacterBtns.at(7)->click();
break;
case Qt::Key_9:
_listCharacterBtns.at(8)->click();
break;
case Qt::Key_0:
_listCharacterBtns.at(9)->click();
break;
case Qt::Key_Backspace:
ui->pushButton_backspace->click();
break;
case Qt::Key_Return:
ui->pushButton_enter->click();
break;
default:
break;
}
}
else
{
switch (event->key())
{
case Qt::Key_Q:
_listCharacterBtns.at(0)->click();
break;
case Qt::Key_W:
_listCharacterBtns.at(1)->click();
break;
case Qt::Key_E:
_listCharacterBtns.at(2)->click();
break;
case Qt::Key_R:
_listCharacterBtns.at(3)->click();
break;
case Qt::Key_T:
_listCharacterBtns.at(4)->click();
break;
case Qt::Key_Y:
_listCharacterBtns.at(5)->click();
break;
case Qt::Key_U:
_listCharacterBtns.at(6)->click();
break;
case Qt::Key_I:
_listCharacterBtns.at(7)->click();
break;
case Qt::Key_O:
_listCharacterBtns.at(8)->click();
break;
case Qt::Key_P:
_listCharacterBtns.at(9)->click();
break;
case Qt::Key_A:
_listCharacterBtns.at(10)->click();
break;
case Qt::Key_S:
_listCharacterBtns.at(11)->click();
break;
case Qt::Key_D:
_listCharacterBtns.at(12)->click();
break;
case Qt::Key_F:
_listCharacterBtns.at(13)->click();
break;
case Qt::Key_G:
_listCharacterBtns.at(14)->click();
break;
case Qt::Key_H:
_listCharacterBtns.at(15)->click();
break;
case Qt::Key_J:
_listCharacterBtns.at(16)->click();
break;
case Qt::Key_K:
_listCharacterBtns.at(17)->click();
break;
case Qt::Key_L:
_listCharacterBtns.at(18)->click();
break;
case Qt::Key_Z:
_listCharacterBtns.at(19)->click();
break;
case Qt::Key_X:
_listCharacterBtns.at(20)->click();
break;
case Qt::Key_C:
_listCharacterBtns.at(21)->click();
break;
case Qt::Key_V:
_listCharacterBtns.at(22)->click();
break;
case Qt::Key_B:
_listCharacterBtns.at(23)->click();
break;
case Qt::Key_N:
_listCharacterBtns.at(24)->click();
break;
case Qt::Key_M:
_listCharacterBtns.at(25)->click();
break;
case Qt::Key_Comma:
_listCharacterBtns.at(26)->click();
break;
case Qt::Key_Period:
_listCharacterBtns.at(27)->click();
break;
case Qt::Key_Question:
_listCharacterBtns.at(28)->click();
break;
case Qt::Key_Backspace:
ui->pushButton_backspace->click();
break;
case Qt::Key_Space:
ui->pushButton_blankspace->click();
break;
case Qt::Key_Return:
ui->pushButton_enter->click();
break;
case Qt::Key_CapsLock:
ui->pushButton_upper->click();
break;
default:
break;
}
}

}

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