vdr-plugin-tvguide/messagebox.c

#include "messagebox.h"

cMessageBoxThread::cMessageBoxThread(cPixmap *content, int displayTime) {
    this->content = content;
    FrameTime = 30; // ms
    FadeTime = 200; // ms
    this->displayTime = displayTime;
}

cMessageBoxThread::~cMessageBoxThread(void) {
    Cancel(-1);
    while (Active())
        cCondWait::SleepMs(10);
}

void cMessageBoxThread::Action(void) {
    uint64_t Start = cTimeMs::Now();
    while (Running()) {
        uint64_t Now = cTimeMs::Now();
        cPixmap::Lock();
        double t = min(double(Now - Start) / FadeTime, 1.0);
        int Alpha = t * ALPHA_OPAQUE;
        if (Running() && content) {
            content->SetAlpha(Alpha);
            osdManager.flush();
        }
        cPixmap::Unlock();
        int Delta = cTimeMs::Now() - Now;
        if (Delta < FrameTime)
           cCondWait::SleepMs(FrameTime - Delta);
        if ((Now - Start) > FadeTime)
            break;
    }
    cCondWait::SleepMs(displayTime - 2*FadeTime);
    Start = cTimeMs::Now();
    while (Running()) {
        uint64_t Now = cTimeMs::Now();
        cPixmap::Lock();
        double t = min(double(Now - Start) / FadeTime, 1.0);
        int Alpha = (1-t) * ALPHA_OPAQUE;
        if (Running() && content) {
            content->SetAlpha(Alpha);
            osdManager.flush();
        }
        cPixmap::Unlock();
        int Delta = cTimeMs::Now() - Now;
        if (Delta < FrameTime)
           cCondWait::SleepMs(FrameTime - Delta);
        if ((Now - Start) > FadeTime)
            break;
    }
    osdManager.flush();
}

//--cMessageBox-------------------------------------------------------------
cMessageBoxThread *cMessageBox::msgboxThread = NULL;
cPixmap *cMessageBox::content = NULL;

bool cMessageBox::Start(int displayTime, cString msg) {
    int width = (tvguideConfig.osdWidth - 600)/2;
    if (!content) {
        int height = 400;
        content = osdManager.requestPixmap(5, cRect((tvguideConfig.osdWidth - width)/2, 
                                                    (tvguideConfig.osdHeight- height)/2, 
                                                    width, height));
    }
    if (msgboxThread) {
        delete msgboxThread;
        msgboxThread = NULL;
    }
    if (!msgboxThread) {
        msgboxThread = new cMessageBoxThread(content, displayTime);
        cTextWrapper message;
        message.Set(msg, tvguideConfig.FontMessageBox, width - 40);
        int textHeight = tvguideConfig.FontMessageBox->Height();
        int textLines = message.Lines();
        int height = textLines * (textHeight+20);
        cPixmap::Lock();
        content->SetViewPort(cRect((tvguideConfig.osdWidth - width)/2,(tvguideConfig.osdHeight- height)/2, width, height));
        content->SetAlpha(0);
        content->Fill(theme.Color(clrBorder));
        content->DrawRectangle(cRect(2,2,width-4, height-4), theme.Color(clrBackground));
        int textWidth = 0;
        for (int i=0; i<textLines; i++) {
            textWidth = tvguideConfig.FontMessageBox->Width(message.GetLine(i));
            content->DrawText(cPoint((width - textWidth)/2, 20 + i*textHeight), message.GetLine(i), theme.Color(clrFont), clrTransparent, tvguideConfig.FontMessageBox);
        }
        cPixmap::Unlock();
        msgboxThread->Start();
        return true;
    }
    return false;
}

void cMessageBox::Stop(void) {
    if (msgboxThread) {
        delete msgboxThread;
        msgboxThread = NULL;
    }
}

void cMessageBox::Destroy(void) {
    if (msgboxThread) {
        delete msgboxThread;
        msgboxThread = NULL;
    }
    if (content) {
        osdManager.releasePixmap(content);
        content = NULL;
    }
}