lava_widget.cpp

#include "lava_widget.h"
#include "lava_thread.h"

LavaWidget::LavaWidget(QWidget *parent) : QWidget(parent, 0, Qt::WStyle_Customize | Qt::WStyle_NoBorderEx)
{
    setFocusPolicy(QWidget::StrongFocus);
    setKeyCompression(false);
    th_lava = new LavaThread(this);
    th_lava->set_colours(qRgb(0, 0, 0), qRgb(240, 240, 240));
    th_lava->start();
}

LavaWidget::~LavaWidget()
{
    th_lava->terminate();
    th_lava->wait();
}

void LavaWidget::set_colours(QColor fg, QColor bg)
{
    th_lava->set_colours(fg.rgb(), bg.rgb());
}

void LavaWidget::customEvent(QCustomEvent *e)
{
    switch (e->type()) {
    case EventExit:
        qApp->quit();
        break;
    default:
        QMessageBox::warning(this, tr("Warning"), tr("Unknown event: %1").arg((int)e->type()));
    }
}

void LavaWidget::keyPressEvent(QKeyEvent *e)
{
    th_lava->keyPress(e);
}

void LavaWidget::keyReleaseEvent(QKeyEvent *e)
{
    th_lava->keyRelease(e);
}

void LavaWidget::mouseReleaseEvent(QMouseEvent *e)
{
    emit touched();
}

void LavaWidget::paintEvent(QPaintEvent *e)
{
    QImage img = th_lava->fb();
    if (img.isNull()) {
        QWidget::paintEvent(e);
        return;
    }

#if 0
    QImage scaled = img;
#else
    const int xscale = size().width() / img.width();
    const int yscale = size().height() / img.height();
    int scale = xscale >= yscale ? yscale : xscale;
    if (scale <= 0)
        scale = 1;
    int w = img.width() * scale;
    int h = img.height() * scale;
    w = w >= width() ? w : width();
    h = h >= height() ? h : height();

    QImage scaled(w, h, img.depth());
    int x0 = (scaled.width() - img.width() * scale) / 2;
    int y0 = (scaled.height() - img.height() * scale) / 2;
    scaled.fill(backgroundColor().rgb());
    for (int y = 0; y < img.height() * scale; y++) {
        for (int x = 0; x < img.width() * scale; x++) {
            QRgb *pis = (QRgb *)img.scanLine(y / scale);
            QRgb *pos = (QRgb *)scaled.scanLine(y0 + y);
            pos[x0 + x] = pis[x / scale];
        }
    }
#endif

    QPixmap pix;
    pix = scaled;
    setBackgroundPixmap(pix);
}