c++ - 罗技 LCD SDK (C++)

Question

我在使用 Logitech LCD SDK 时遇到问题。一切正常，但 2 个简单的事情不起作用。首先我无法让进度条工作。我每秒更新进度条的值并更新屏幕。什么都没发生。我已经测试了从 0 到 100 和从 0 到 1 的值，没有差异。

第二个问题是VS2012中的图片。我无法在 C++ Dll 中加载图像。下面的代码是我的 Logitech 类，其中包含屏幕的所有数据。完整的源代码可以在 BitBucket 找到。 .

我希望有人能帮助我吗？

编辑:问题出在进度条上。所有其余的代码都有效，例如。它把罗技液晶屏上的所有东西都画出来了，连进度条，时间，……但真正的问题出在进度条的进度上。这意味着栏背景绘制完美，但进度条没有移动，它似乎固定在 15% 左右的进度。通常，进度必须与音乐播放时相关联，例如，如果音乐文件为 3 分钟，则意味着 180 秒必须作为 100% 进度进行传输。但这不起作用!

  //-----------------------------------------------------------------
// Logitech File
// C++ Source - Logitech.cpp - version 2012 v1.0
//-----------------------------------------------------------------

//-----------------------------------------------------------------
// Include Files
//-----------------------------------------------------------------
#include "stdafx.h"
#include "Logitech.h"

//-----------------------------------------------------------------
// Logitech methods
//-----------------------------------------------------------------

//This LogitechObject is a instance of the Logitech class for using in the thread
Logitech * Logitech::LogitechObject;

Logitech::Logitech():   stopthread(false), firstTime(true), position(0), duration(0)
{
    LogitechObject = this;
}

Logitech::~Logitech()
{
    stopthread = true;
    this->state = StatePlay::Undefined;
    timerThread.detach();
}

bool Logitech::getFirstTime()
{
    return firstTime;
}

//Initialise Logitech LCD
BOOL Logitech::OnInitDialog()
{
    HRESULT hRes = m_lcd.Initialize(_T("MusicBee"), LG_DUAL_MODE, FALSE, TRUE);

    if (hRes != S_OK)
    {
        return FALSE;
    }

    //Create home screen Logitech Color LCD
    if(m_lcd.IsDeviceAvailable(LG_COLOR))
    {
        m_lcd.ModifyDisplay(LG_COLOR);
        logo = m_lcd.AddText(LG_STATIC_TEXT, LG_BIG, DT_CENTER, LGLCD_BW_BMP_WIDTH);
        m_lcd.SetOrigin(logo, 0, 50);
        m_lcd.SetText(logo, _T("MusicBee"));
        m_lcd.Update();
    }

    //Create home screen Logitech Monochrome LCD
    else if(m_lcd.IsDeviceAvailable(LG_MONOCHROME))
    {
        m_lcd.ModifyDisplay(LG_MONOCHROME);
        logo = m_lcd.AddText(LG_STATIC_TEXT, LG_BIG, DT_CENTER, LGLCD_BW_BMP_WIDTH);
        m_lcd.SetOrigin(logo, 0, 5);
        m_lcd.SetText(logo, _T("MusicBee"));
        m_lcd.Update();
    }

    //Start thread
    timerThread = thread(&Logitech::startThread);

    return TRUE;  // return TRUE  unless you set the focus to a control
}

//Create playing screen for Logitech Monochrome LCD
VOID Logitech::createMonochrome()
{
    m_lcd.RemovePage(0);
    m_lcd.AddNewPage();
    m_lcd.ShowPage(0);

    if (logo != 0)
    {
        delete logo;
        logo = 0;
    }

    artist = m_lcd.AddText(LG_SCROLLING_TEXT, LG_MEDIUM, DT_CENTER, LGLCD_BW_BMP_WIDTH);
    m_lcd.SetOrigin(artist, 0, 0);

    title = m_lcd.AddText(LG_SCROLLING_TEXT, LG_MEDIUM, DT_CENTER, LGLCD_BW_BMP_WIDTH);
    m_lcd.SetOrigin(title, 0, 13);

    progressbar = m_lcd.AddProgressBar(LG_FILLED);
    m_lcd.SetProgressBarSize(progressbar, 136, 5);
    m_lcd.SetOrigin(progressbar, 12, 38);

    time = m_lcd.AddText(LG_STATIC_TEXT, LG_SMALL, DT_LEFT, 80);
    m_lcd.SetOrigin(time, 12, 29);

    time1 = m_lcd.AddText(LG_STATIC_TEXT, LG_SMALL, DT_LEFT, 80);
    m_lcd.SetOrigin(time1, 125, 29);

    /*  playIcon = static_cast<HICON>(LoadImage(GetModuleHandle(NULL), MAKEINTRESOURCE(IDB_PNG2), IMAGE_BITMAP, 16, 16, LR_MONOCHROME));
    playIconHandle = m_lcd.AddIcon(playIcon, 16, 16);
    m_lcd.SetOrigin(playIconHandle, 2, 29);*/

    firstTime = false;
    changeArtistTitle(this->artistString, this->albumString, this->titleString, this->durationString, this->position);
}

//Create playing screen for Logitech Color LCD
VOID Logitech::createColor()
{
    m_lcd.RemovePage(0);
    m_lcd.AddNewPage();
    m_lcd.ShowPage(0);

    if (logo != 0)
    {
        delete logo;
        logo = 0;
    }

    artist = m_lcd.AddText(LG_SCROLLING_TEXT, LG_MEDIUM, DT_CENTER, 320);
    m_lcd.SetOrigin(artist, 5, 5);

    album = m_lcd.AddText(LG_SCROLLING_TEXT, LG_MEDIUM, DT_CENTER, 320);
    m_lcd.SetOrigin(album, 5, 30);

    title = m_lcd.AddText(LG_SCROLLING_TEXT, LG_MEDIUM, DT_CENTER, 320);
    m_lcd.SetOrigin(title, 5, 55);

    time = m_lcd.AddText(LG_STATIC_TEXT, LG_SMALL, DT_LEFT, 80);
    m_lcd.SetOrigin(time, 5, 80);

    time1 = m_lcd.AddText(LG_STATIC_TEXT, LG_SMALL, DT_LEFT, 80);
    m_lcd.SetOrigin(time1, 275, 80);

    progressbar = m_lcd.AddProgressBar(LG_DOT_CURSOR);//320×240 pixel color screen
    m_lcd.SetProgressBarSize(progressbar, 310, 15);
    m_lcd.SetOrigin(progressbar, 5, 100);

    time1 = m_lcd.AddText(LG_STATIC_TEXT, LG_SMALL, DT_LEFT, 80);
    m_lcd.SetOrigin(time1, 275, 80);

    /*playIcon = static_cast<HICON>(LoadImage(AfxGetInstanceHandle(), MAKEINTRESOURCE(IDB_PNG1), IMAGE_ICON, 16, 16, LR_COLOR));
    playIconHandle = m_lcd.AddIcon(playIcon, 16, 16);
    m_lcd.SetOrigin(playIconHandle, 5, 29);*/

    firstTime = false;
    changeArtistTitle(this->artistString, this->albumString, this->titleString, this->durationString, this->position);
}

void Logitech::startThread()
{
    while(!LogitechObject->stopthread)
    {
        this_thread::sleep_for( chrono::milliseconds(500) );

        if(!LogitechObject->stopthread && LogitechObject->progressbar != NULL)
        {
            //Update progressbar and position time on the screen after 1 second of music.
            if(LogitechObject->state == StatePlay::Playing)
            {
                this_thread::sleep_for( chrono::milliseconds(500) );
                LogitechObject->position++;

                LogitechObject->m_lcd.SetProgressBarPosition(LogitechObject->progressbar, static_cast<FLOAT>(((float)LogitechObject->position / LogitechObject->duration)*100));
                LogitechObject->m_lcd.SetText(LogitechObject->time, LogitechObject->getPositionString().c_str());
            }

            //If music stopped then the progressbar and time must stop immediately
            else if(LogitechObject->state == StatePlay::Stopped)
            {
                LogitechObject->position = 0;
                LogitechObject->m_lcd.SetProgressBarPosition(LogitechObject->progressbar, 0);
                LogitechObject->m_lcd.SetText(LogitechObject->time, LogitechObject->getPositionString().c_str());
            }

            LogitechObject->m_lcd.Update();
        }
    }
}

void Logitech::changeArtistTitle(wstring artistStr, wstring albumStr, wstring titleStr, wstring duration, int position)
{
    this->artistString = artistStr;
    this->albumString = albumStr;
    this->titleString = titleStr;
    this->durationString = duration;
    this->position = position;
    this->duration = getDuration(duration);

    if(!firstTime)
    {
        if(m_lcd.IsDeviceAvailable(LG_COLOR))
        {
            m_lcd.SetText(album, albumStr.c_str());
        }


        m_lcd.SetText(artist, artistStr.c_str());
        m_lcd.SetText(title, titleStr.c_str());
        m_lcd.SetText(time, getPositionString().c_str());

        string s( duration.begin(), duration.end() );

        if(s.size() < 5)
        {
            s = "0" + s;
        }

        wstring ws( s.begin(), s.end() );

        m_lcd.SetText(time1, ws.c_str());
        ws.clear();

        ///*playIcon = static_cast<HICON>(LoadImage(AfxGetInstanceHandle(), MAKEINTRESOURCE(IDB_PNG1), IMAGE_ICON, 16, 16, LR_COLOR));
        //playIconHandle = m_lcd.AddIcon(playIcon, 16, 16);
        //m_lcd.SetOrigin(playIconHandle, 5, 29);*/

        m_lcd.Update();
        artistStr.clear();
        albumStr.clear();
        titleStr.clear();
        duration.clear();
    }
}

//Set current playing position
void Logitech::setPosition(int pos)
{
    this->position = pos/1000;
    m_lcd.SetText(time, getPositionString().c_str());
    m_lcd.Update();
}

//Change play state of the current playing song
void Logitech::changeState(StatePlay state)
{
    this->state = state;

    if(state == StatePlay::Playing && firstTime)
    {
        if(m_lcd.IsDeviceAvailable(LG_COLOR))
        {
            createColor();
        }

        else if(m_lcd.IsDeviceAvailable(LG_MONOCHROME))
        {
            createMonochrome();
        }
    }
}

//Gets the music duration
int Logitech::getDuration(wstring duration)
{
    string s( duration.begin(), duration.end() );

    int position = s.find(":");
    string minutes = s.substr(0, s.size() -position);
    string seconds = s.substr(position);
    int minutesInt = atoi(minutes.c_str());
    int secondsInt = atoi(seconds.c_str());

    return (minutesInt *60) + secondsInt;
}

//Change current position in string
wstring Logitech::getPositionString()
{
    string minutes = to_string((int)position /60);
    string seconds = to_string((int)position%60);

    if(minutes.size() < 2)
    {
        minutes = "0" + minutes;
    }

    if(seconds.size() < 2)
    {
        seconds = "0" + seconds;
    }

    string time = minutes + ":" + seconds;

    return wstring( time.begin(), time.end() );
}

Answer 1

在您尝试找出您的代码有什么问题之前，您应该验证 SDK 是否按您预期的方式运行。

请将此代码添加到您的 Logitech::startThread() 顶部，让我知道发生了什么:

LogitechObject->m_lcd.SetText(LogitechObject->time, "ProgressBar TEST SEQUENCE");
this_thread::sleep_for( chrono::milliseconds(2000) );
LogitechObject->m_lcd.SetText(LogitechObject->time, "ProgressBar TEST 0%");
LogitechObject->m_lcd.SetProgressBarPosition(LogitechObject->progressbar, 0);
this_thread::sleep_for( chrono::milliseconds(2000) );
LogitechObject->m_lcd.SetText(LogitechObject->time, "ProgressBar TEST 10%");
LogitechObject->m_lcd.SetProgressBarPosition(LogitechObject->progressbar, 10);
this_thread::sleep_for( chrono::milliseconds(2000) );
LogitechObject->m_lcd.SetText(LogitechObject->time, "ProgressBar TEST 20%");
LogitechObject->m_lcd.SetProgressBarPosition(LogitechObject->progressbar, 20);
this_thread::sleep_for( chrono::milliseconds(2000) );
LogitechObject->m_lcd.SetText(LogitechObject->time, "ProgressBar TEST 30%");
LogitechObject->m_lcd.SetProgressBarPosition(LogitechObject->progressbar, 30);
this_thread::sleep_for( chrono::milliseconds(2000) );
LogitechObject->m_lcd.SetText(LogitechObject->time, "ProgressBar TEST 40%");
LogitechObject->m_lcd.SetProgressBarPosition(LogitechObject->progressbar, 40);
this_thread::sleep_for( chrono::milliseconds(2000) );
LogitechObject->m_lcd.SetText(LogitechObject->time, "ProgressBar TEST 50%");
LogitechObject->m_lcd.SetProgressBarPosition(LogitechObject->progressbar, 50);
this_thread::sleep_for( chrono::milliseconds(2000) );
LogitechObject->m_lcd.SetText(LogitechObject->time, "ProgressBar TEST 60%");
LogitechObject->m_lcd.SetProgressBarPosition(LogitechObject->progressbar, 60);
this_thread::sleep_for( chrono::milliseconds(2000) );
LogitechObject->m_lcd.SetText(LogitechObject->time, "ProgressBar TEST 70%");
LogitechObject->m_lcd.SetProgressBarPosition(LogitechObject->progressbar, 70);
this_thread::sleep_for( chrono::milliseconds(2000) );
LogitechObject->m_lcd.SetText(LogitechObject->time, "ProgressBar TEST 80%");
LogitechObject->m_lcd.SetProgressBarPosition(LogitechObject->progressbar, 80);
this_thread::sleep_for( chrono::milliseconds(2000) );
LogitechObject->m_lcd.SetText(LogitechObject->time, "ProgressBar TEST 90%");
LogitechObject->m_lcd.SetProgressBarPosition(LogitechObject->progressbar, 90);
this_thread::sleep_for( chrono::milliseconds(2000) );
LogitechObject->m_lcd.SetText(LogitechObject->time, "ProgressBar TEST 100%");
LogitechObject->m_lcd.SetProgressBarPosition(LogitechObject->progressbar, 100);
this_thread::sleep_for( chrono::milliseconds(2000) );
LogitechObject->m_lcd.SetText(LogitechObject->time, "ProgressBar TEST COMPLETE");
this_thread::sleep_for( chrono::milliseconds(2000) );

理想情况下，它会将进度条设置为每个百分比一次两秒，让您验证进度条是否按预期运行。如果这不起作用，那么尝试找出您自己的代码有什么问题就没有多大意义；要么是SDK有问题，要么是你对它的控制参数的理解不符合SDK的要求。

让我知道你的结果。