【Qt编程】基于Qt的词典开发系列<十二>调用讲述人

我们知道，win7系统自带有讲述人，即可以机器读出当前内容，具体可以将电脑锁定，然后点击左下角的按钮即可。之前在用Matlab写扫雷游戏的时候，也曾经调用过讲述人来进行游戏的语音提示。具体的Matlab脚本文件如下：

sp=actxserver('SAPI.SpVoice');sp.Speak('你好，欢迎来到西安电子科技大学！Hello,Welcome to XD University!')

Qt调用讲述人，需要使用专门的类，具体可以参考http://lynxline.com/qtspeech-say-hello-world 一文，文中大致介绍了该类的使用方法。下面我就通过使用该类来实现讲述人的调用。 首先建立一个dialog类型的gui项目，将上面所说的类QtSpeech类的头文件speech.h和源文件speech.cpp添加到工程中，这样项目中就有5个文件：dialog.h、speech.h、main.cpp、dialog.cpp、speech.cpp。当然还有界面文件dialog.ui。在界面文件中添加QTextEdit控件用于输入你要读取的文字，然后在其槽函数中添加QtSpeech的发音功能，添加QPushButton控件来控制发音。具体的各个文件源代码如下：1、dialog.h

#ifndef DIALOG_H
#define DIALOG_H
#include <QDialog>
#include"speech.h"
namespace Ui {
class Dialog;
}
class Dialog : public QDialog
{
Q_OBJECT

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

private slots:
void on_pushButton_clicked();
private:
Ui::Dialog *ui;
};
#endif // DIALOG_H

2、speech.h

#ifndef SPEECH_H
#define SPEECH_H
#include <QObject>
class QtSpeech : public QObject {
Q_OBJECT
public:
// 处理异常情况
struct Error { QString msg; Error(QString s):msg(s) {} };
struct InitError : Error { InitError(QString s):Error(s) {} };
struct LogicError : Error { LogicError(QString s):Error(s) {} };
struct CloseError : Error { CloseError(QString s):Error(s) {} };
//定义数据类型
struct VoiceName { QString id; QString name; };
typedef QList<VoiceName> VoiceNames;
//定义构造函数
QtSpeech(QObject * parent);
QtSpeech(VoiceName n = VoiceName(), QObject * parent =0L);
virtual ~QtSpeech();
const VoiceName & name() const; //要读的内容
static VoiceNames voices();     //要读的内容
void say(QString) const;                                    //同步发音
void tell(QString) const;                                   //异步发音
void tell(QString, QObject * obj, const char * slot) const; //发音结束时，有停顿
/*******************/
void pause(void) const;//暂停
void resume(void) const;//从暂停中恢复
void stop(void) const;//停止发音
/******************/
signals:
void finished();
protected:
virtual void timerEvent(QTimerEvent *);
private:
class Private;
Private * d;
};
//}
#endif // SPEECH_H

3、main.cpp

#include <QApplication>
#include"dialog.h"
int main(int argc, char *argv[]){
QApplication app(argc, argv);
Dialog dlg;
dlg.show();
return app.exec();
}

4、dialog.cpp

#include "dialog.h"
#include "ui_dialog.h"
Dialog::Dialog(QWidget *parent) :
QDialog(parent),
ui(new Ui::Dialog)
{
ui->setupUi(this);
}
Dialog::~Dialog()
{
delete ui;
}
void Dialog::on_pushButton_clicked()
{
QtSpeech *speaker = new QtSpeech(this);
speaker->tell(ui->textEdit->toPlainText(),speaker,SLOT(onSpeechFinished()));
// speaker.stop();
}

5、speech.cpp

#include "speech.h"
#include <QString>
#include <QPointer>
#include <QList>
#include <QTimerEvent>
#undef UNICODE
#include <sapi.h>
#include <sphelper.h>
#include <comdef.h>
#define UNICODE
#include <windows.h>
#include <windowsx.h>
#include <commctrl.h>
// some defines for throwing exceptions
#define Where QString("%1:%2:").arg(__FILE__).arg(__LINE__)
#define SysCall(x,e) {\
HRESULT hr = x;\
if (FAILED(hr)) {\
QString msg = #e;\
msg += ":"+QString(__FILE__);\
msg += ":"+QString::number(__LINE__)+":"+#x+":";\
msg += _com_error(hr).ErrorMessage();\
throw e(msg);\
}\
}
// internal data
class QtSpeech::Private {
public:
Private()
:onFinishSlot(0L),waitingFinish(false) {}
VoiceName name;
static const QString VoiceId;
typedef QPointer<QtSpeech> Ptr;
static QList<Ptr> ptrs;
CComPtr<ISpVoice> voice;
const char * onFinishSlot;
QPointer<QObject> onFinishObj;
bool waitingFinish;
class WCHAR_Holder {
public:
WCHAR * w;
WCHAR_Holder(QString s)
:w(0) {
w = new WCHAR[s.length()+1];
s.toWCharArray(w);
w[s.length()] =0;
}
~WCHAR_Holder() { delete[] w; }
};
};
const QString QtSpeech::Private::VoiceId = QString("win:%1");
QList<QtSpeech::Private::Ptr> QtSpeech::Private::ptrs = QList<QtSpeech::Private::Ptr>();
//类的定义
QtSpeech::QtSpeech(QObject * parent)
:QObject(parent), d(new Private)
{
CoInitialize(NULL);
SysCall( d->voice.CoCreateInstance( CLSID_SpVoice ), InitError);
VoiceName n;
WCHAR * w_id = 0L;
WCHAR * w_name = 0L;
CComPtr<ISpObjectToken> voice;
SysCall( d->voice->GetVoice(&voice), InitError);
SysCall( SpGetDescription(voice, &w_name), InitError);
SysCall( voice->GetId(&w_id), InitError);
n.name = QString::fromWCharArray(w_name);
n.id = QString::fromWCharArray(w_id);
voice.Release();
if (n.id.isEmpty())
throw InitError(Where+"No default voice in system");
d->name = n;
d->ptrs << this;
}
QtSpeech::QtSpeech(VoiceName n, QObject * parent)
:QObject(parent), d(new Private)
{
ULONG count = 0;
CComPtr<IEnumSpObjectTokens> voices;
CoInitialize(NULL);
SysCall( d->voice.CoCreateInstance( CLSID_SpVoice ), InitError);
if (n.id.isEmpty()) {
WCHAR * w_id = 0L;
WCHAR * w_name = 0L;
CComPtr<ISpObjectToken> voice;
SysCall( d->voice->GetVoice(&voice), InitError);
SysCall( SpGetDescription(voice, &w_name), InitError);
SysCall( voice->GetId(&w_id), InitError);
n.name = QString::fromWCharArray(w_name);
n.id = QString::fromWCharArray(w_id);
voice.Release();
}
else {
SysCall( SpEnumTokens(SPCAT_VOICES, NULL, NULL, &voices), InitError);
SysCall( voices->GetCount(&count), InitError);
for (int i =0; i< count; ++i) {
WCHAR * w_id = 0L;
CComPtr<ISpObjectToken> voice;
SysCall( voices->Next( 1, &voice, NULL ), InitError);
SysCall( voice->GetId(&w_id), InitError);
QString id = QString::fromWCharArray(w_id);
if (id == n.id) d->voice->SetVoice(voice);
voice.Release();
}
}
if (n.id.isEmpty())
throw InitError(Where+"No default voice in system");
d->name = n;
d->ptrs << this;
}
QtSpeech::~QtSpeech()
{
d->ptrs.removeAll(this);
delete d;
}
const QtSpeech::VoiceName & QtSpeech::name() const {
return d->name;
}
QtSpeech::VoiceNames QtSpeech::voices()
{
VoiceNames vs;
ULONG count = 0;
CComPtr<IEnumSpObjectTokens> voices;
CoInitialize(NULL);
SysCall( SpEnumTokens(SPCAT_VOICES, NULL, NULL, &voices), LogicError);
SysCall( voices->GetCount(&count), LogicError);
for(int i=0; i< count; ++i) {
WCHAR * w_id = 0L;
WCHAR * w_name = 0L;
CComPtr<ISpObjectToken> voice;
SysCall( voices->Next( 1, &voice, NULL ), LogicError);
SysCall( SpGetDescription(voice, &w_name), LogicError);
SysCall( voice->GetId(&w_id), LogicError);
QString id = QString::fromWCharArray(w_id);
QString name = QString::fromWCharArray(w_name);
VoiceName n = { id, name };
vs << n;
voice.Release();
}
return vs;
}
void QtSpeech::tell(QString text) const {
tell(text, 0L,0L);
}
void QtSpeech::tell(QString text, QObject * obj, const char * slot) const
{
if (d->waitingFinish)
throw LogicError(Where+"Already waiting to finish speech");
d->onFinishObj = obj;
d->onFinishSlot = slot;
if (obj && slot)
connect(const_cast<QtSpeech *>(this), SIGNAL(finished()), obj, slot);
d->waitingFinish = true;
const_cast<QtSpeech *>(this)->startTimer(100);
Private::WCHAR_Holder w_text(text);
SysCall( d->voice->Speak( w_text.w, SPF_ASYNC | SPF_IS_NOT_XML, 0), LogicError);
}
void QtSpeech::say(QString text) const
{
Private::WCHAR_Holder w_text(text);
SysCall( d->voice->Speak( w_text.w, SPF_IS_NOT_XML, 0), LogicError);
}
void QtSpeech::timerEvent(QTimerEvent * te)
{
QObject::timerEvent(te);
if (d->waitingFinish) {
SPVOICESTATUS es;
d->voice->GetStatus( &es, NULL );
if (es.dwRunningState == SPRS_DONE) {
d->waitingFinish = false;
killTimer(te->timerId());
finished();
}
}
}
/************************/
void QtSpeech::pause(void) const{//暂停
SysCall( d->voice->Pause(), LogicError);
}
void QtSpeech::resume() const{//恢复
SysCall(d->voice->Resume(), LogicError);
}
void QtSpeech::stop() const{//停止
SysCall(d->voice->Speak(NULL, SPF_PURGEBEFORESPEAK, 0), LogicError)
}
/***************************/
//}

程序结果如下：


基于Qt的词典开发系列

词典框架设计及成品展示
本地词典的设计
开始菜单的设计
无边框窗口的缩放与拖动
无边框窗口的拖动
界面美化设计
调用网络API
用户登录及API调用的实现
JSON数据解析
国际音标的显示
系统托盘的显示
调用讲述人
音频播放
自动补全功能
HTML特殊字符及正则表达式
后序
作品下载地址（发布版）：http://download.csdn.net/detail/tengweitw/8548767作品下载地址（绿色版）：http://download.csdn.net/detail/tengweitw/8830495源码下载地址：http://download.csdn.net/detail/tengweitw/8830503

原文：http://blog.csdn.net/tengweitw/article/details/38306803

作者：nineheadedbird