QT控件大全 三十八 QWidgetKeyboard

效果如图：

核心代码：

#ifndef __WIDGETKEYBOARD_H_#define __WIDGETKEYBOARD_H_#include <QWidget>#include "ui_WidgetKeyboard.h"class QSignalMapper;class WidgetKeyboard : public QWidget, public Ui::WidgetKeyboard{    Q_OBJECT        private:QWidget *m_pParent;qreal opacity;bool isCaps;bool isShift;bool isCtrl;bool isAlt;bool isIns;QSignalMapper *signalMapper;QList<QToolButton *> allButtons;QString soundFilePath;            private slots:void on_btn_clicked(int btn);void on_btnCaps_toggled(bool checked);void on_btnShiftLeft_toggled(bool checked);void on_btnShiftRight_toggled(bool checked);void on_btnCtrlLeft_toggled(bool checked);void on_btnAltLeft_toggled(bool checked);void on_btnIns_clicked();void on_btnPrint_clicked();void on_sliderOpacity_valueChanged(int);void changeTextShift(bool isShift);void changeTextCaps(bool isCaps);bool checkNotTextKey(int keyId);void on_checkBoxShowNumPad_stateChanged(int state);    public:WidgetKeyboard(QWidget *parent = NULL);~WidgetKeyboard();void setOpacity(int);int getOpacity();void setSoundDisabled();void setSoundEnabled(QString soundPath);};#endif /*__WIDGETKEYBOARD_H_*/

#include "WidgetKeyboard.h"#include <QKeyEvent>#include <QSignalMapper>#include <QSound>#include <QMessageBox>#include <QDesktopWidget>#include <QClipboard>#include <QList>WidgetKeyboard::WidgetKeyboard(QWidget *parent) : QWidget(0){    setupUi(this);    resize(0,0);    this->setWindowFlags(Qt::Tool);    m_pParent = parent;    isCaps = false;    isShift = false;    isCtrl = false;    isAlt = false;isIns = false;    changeTextCaps(false);    signalMapper = new QSignalMapper(this);    sliderOpacity->setRange(20,100);    allButtons = findChildren<QToolButton *>();    for (int i=0;i<allButtons.count();i++) {        connect(allButtons.at(i), SIGNAL(clicked()), signalMapper, SLOT(map()));        signalMapper->setMapping(allButtons.at(i), i);    }    connect(signalMapper, SIGNAL(mapped(int)), this, SLOT(on_btn_clicked(int)));}WidgetKeyboard::~WidgetKeyboard(){delete signalMapper;}void WidgetKeyboard::on_btn_clicked(int btn){if(! soundFilePath.isEmpty())QSound::play(soundFilePath);QString strKeyId;    strKeyId = allButtons.at(btn)->accessibleName();    bool isOk;    int keyId = strKeyId.toInt(&isOk, 16);    if (strKeyId.isEmpty() || !isOk) {        QMessageBox::information(0,0,"Key Not Found");        return;    }        //Keys to be handled separatelyif (keyId==Qt::Key_Shift|| keyId==Qt::Key_Control|| keyId==Qt::Key_Alt|| keyId==Qt::Key_Print)        return;    int involvedKeys = 1;    Qt::KeyboardModifiers Modifier = Qt::NoModifier;    if (isCtrl) {        Modifier = Modifier | Qt::ControlModifier;        involvedKeys++;    }    if (isShift) {        Modifier = Modifier | Qt::ShiftModifier;        involvedKeys++;    }    if (isAlt) {        Modifier = Modifier | Qt::AltModifier;        involvedKeys++;    }            bool isTextKey = false;if(keyId==Qt::Key_Insert && !isShift)return;QString ch = allButtons.at(btn)->text().trimmed();    if (ch=="&&")        ch="&";else if (keyId==Qt::Key_Space)        ch = " ";    else if (checkNotTextKey(keyId))ch = QString();elseisTextKey = true;    if(isIns && isTextKey) {QKeyEvent keyEventIns(QEvent::KeyPress, Qt::Key_Delete, Qt::NoModifier);QApplication::sendEvent(m_pParent->focusWidget(), &keyEventIns);}QKeyEvent keyEvent(QEvent::KeyPress, keyId, Modifier, ch, false, involvedKeys);    QApplication::sendEvent(m_pParent->focusWidget(), &keyEvent);        btnShiftLeft->setChecked(false);btnShiftRight->setChecked(false);    btnCtrlLeft->setChecked(false);    btnAltLeft->setChecked(false);}void WidgetKeyboard::on_btnCaps_toggled(bool checked){    changeTextCaps(checked);    isCaps = checked;}void WidgetKeyboard::on_btnShiftLeft_toggled(bool checked){    isShift = checked;    if (isCaps) {        changeTextShift(checked);    }    else {        changeTextShift(checked);        changeTextCaps(checked);    }}void WidgetKeyboard::on_btnShiftRight_toggled(bool checked){    on_btnShiftLeft_toggled(checked);}void WidgetKeyboard::on_btnCtrlLeft_toggled(bool checked){    isCtrl = checked;}void WidgetKeyboard::on_btnAltLeft_toggled(bool checked){    isAlt = checked;}void WidgetKeyboard::on_btnIns_clicked(){isIns = !isIns;}void WidgetKeyboard::on_btnPrint_clicked(){QPixmap screen = QPixmap::grabWindow(QApplication::desktop()->winId());QClipboard *cb = QApplication::clipboard();cb->setPixmap(screen, QClipboard::Clipboard);}void WidgetKeyboard::on_sliderOpacity_valueChanged(int val){    opacity = 120.0 - val;    opacity /= 100.0;        setWindowOpacity(opacity);    }void WidgetKeyboard::changeTextShift(bool isShift){        changeTextCaps(!isShift);    if (isShift) {btnTilt->setText(QChar('~'));        btn1->setText(QChar('!'));        btn2->setText(QChar('@'));        btn3->setText(QChar('#'));        btn4->setText(QChar('$'));        btn5->setText(QChar('%'));        btn6->setText(QChar('^'));                btn7->setText("&&");        btn8->setText(QChar('*'));        btn9->setText(QChar('('));        btn0->setText(QChar(')'));        btnHiphen->setText(QChar('_'));        btnAssign->setText(QChar('+'));                btnStartSquare->setText(QChar('{'));        btnCloseSquare->setText(QChar('}'));        btnFwdSlash->setText(QChar('|'));                btnSemiColon->setText(QChar(':'));        btnSp->setText(QChar('"'));                    btnComma->setText(QChar('<'));        btnPeriod->setText(QChar('>'));        btnBcwdSlash->setText(QChar('?'));}    else {btnTilt->setText(QChar('`'));        btn1->setText(QChar('1'));        btn2->setText(QChar('2'));        btn3->setText(QChar('3'));        btn4->setText(QChar('4'));        btn5->setText(QChar('5'));        btn6->setText(QChar('6'));        btn7->setText(QChar('7'));        btn8->setText(QChar('8'));        btn9->setText(QChar('9'));        btn0->setText(QChar('0'));        btnHiphen->setText(QChar('-'));        btnAssign->setText(QChar('='));                    btnStartSquare->setText(QChar('['));        btnCloseSquare->setText(QChar(']'));        btnFwdSlash->setText(QChar('\\'));                btnSemiColon->setText(QChar(';'));        btnSp->setText(QChar('\''));                btnComma->setText(QChar(','));        btnPeriod->setText(QChar('.'));        btnBcwdSlash->setText(QChar('/'));    }}void WidgetKeyboard::changeTextCaps(bool isCaps){        if (isCaps) {        btnQ->setText(QChar('Q'));        btnW->setText(QChar('W'));        btnE->setText(QChar('E'));        btnR->setText(QChar('R'));        btnT->setText(QChar('T'));        btnY->setText(QChar('Y'));        btnU->setText(QChar('U'));        btnI->setText(QChar('I'));        btnO->setText(QChar('O'));        btnP->setText(QChar('P'));        btnA->setText(QChar('A'));        btnS->setText(QChar('S'));        btnD->setText(QChar('D'));        btnF->setText(QChar('F'));        btnG->setText(QChar('G'));        btnH->setText(QChar('H'));        btnJ->setText(QChar('J'));        btnK->setText(QChar('K'));        btnL->setText(QChar('L'));                        btnZ->setText(QChar('Z'));        btnX->setText(QChar('X'));        btnC->setText(QChar('C'));        btnV->setText(QChar('V'));        btnB->setText(QChar('B'));        btnN->setText(QChar('N'));        btnM->setText(QChar('M'));            }else {        btnQ->setText(QChar('q'));        btnW->setText(QChar('w'));        btnE->setText(QChar('e'));        btnR->setText(QChar('r'));        btnT->setText(QChar('t'));        btnY->setText(QChar('y'));        btnU->setText(QChar('u'));        btnI->setText(QChar('i'));        btnO->setText(QChar('o'));        btnP->setText(QChar('p'));        btnA->setText(QChar('a'));        btnS->setText(QChar('s'));        btnD->setText(QChar('d'));        btnF->setText(QChar('f'));        btnG->setText(QChar('g'));        btnH->setText(QChar('h'));        btnJ->setText(QChar('j'));        btnK->setText(QChar('k'));        btnL->setText(QChar('l'));                btnZ->setText(QChar('z'));        btnX->setText(QChar('x'));        btnC->setText(QChar('c'));        btnV->setText(QChar('v'));        btnB->setText(QChar('b'));        btnN->setText(QChar('n'));        btnM->setText(QChar('m'));    }}bool WidgetKeyboard::checkNotTextKey(int keyId){if (keyId==Qt::Key_Shift            || keyId==Qt::Key_Control            || keyId==Qt::Key_Tab            || keyId==Qt::Key_Escape            || keyId==Qt::Key_Return            || keyId==Qt::Key_Insert            || keyId==Qt::Key_NumLock            || keyId==Qt::Key_F1            || keyId==Qt::Key_F2            || keyId==Qt::Key_F3            || keyId==Qt::Key_F4            || keyId==Qt::Key_F5            || keyId==Qt::Key_F6            || keyId==Qt::Key_F7            || keyId==Qt::Key_F8            || keyId==Qt::Key_F9            || keyId==Qt::Key_F10            || keyId==Qt::Key_F11            || keyId==Qt::Key_F12            || keyId==Qt::Key_Print            || keyId==Qt::Key_Pause            || keyId==Qt::Key_ScrollLock            || keyId==Qt::Key_Enter            || keyId==Qt::Key_Home            || keyId==Qt::Key_End            || keyId==Qt::Key_CapsLock            || keyId==Qt::Key_Insert            || keyId==Qt::Key_Delete            || keyId==Qt::Key_PageUp            || keyId==Qt::Key_PageDown            || keyId==Qt::Key_Down            || keyId==Qt::Key_Up            || keyId==Qt::Key_Left            || keyId==Qt::Key_Right|| keyId==Qt::Key_Alt) {return true;}elsereturn false;}void WidgetKeyboard::setOpacity(int opacity){    sliderOpacity->setValue(opacity);}int WidgetKeyboard::getOpacity(){    return sliderOpacity->value();}void WidgetKeyboard::setSoundDisabled(){soundFilePath = "";}/* Microsoft Windows : The underlying multimedia system is used; only WAVE format sound files are supported.X11: The Network Audio System is used if available, otherwise all operations work silently. NAS supports WAVE and AU files.Mac OS X : NSSound is used. All formats that NSSound supports, including QuickTime formats, are supported by Qt for Mac OS X.Qt for Embedded Linux : A built-in mixing sound server is used, accessing /dev/dsp directly. Only the WAVE format is supported.*/void WidgetKeyboard::setSoundEnabled(QString soundPath){soundFilePath = soundPath;}void WidgetKeyboard::on_checkBoxShowNumPad_stateChanged(int state){QList<QWidget *> children = frameNumPad->findChildren<QWidget *>();if(state==Qt::Checked){frameNumPad->show();/*for each(QWidget *child in children)child->show();*/}else{frameNumPad->hide();/*for each(QWidget *child in children)child->hide();*/}update();}

源码工程：QQ:609162385