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Implemented basic preview!

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This commit is contained in:
0xFEEDC0DE64
2020-04-27 23:39:49 +02:00
parent e9c905eb67
commit 686f42265e
6 changed files with 70 additions and 18 deletions
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17
graphrenderer.cpp
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@ -15,17 +15,16 @@ QPixmap GraphRenderer::render(const QSize &size, const frame_t *frameBegin, cons
painter.fillRect(pixmap.rect(), palette.base());
painter.setPen(Qt::white);
painter.setBrush(Qt::black);
painter.setBrush(palette.base());
painter.drawRect(QRect({}, size));
painter.drawRect(pixmap.rect());
render(size, frameBegin, frameEnd, painter, palette);
render(pixmap.rect(), frameBegin, frameEnd, painter, palette);
painter.end();
return pixmap;
}
void GraphRenderer::render(const QSize &size, const frame_t *frameBegin, const frame_t *frameEnd, QPainter &painter, const QPalette &palette)
void GraphRenderer::render(const QRect &rect, const frame_t *frameBegin, const frame_t *frameEnd, QPainter &painter, const QPalette &palette)
{
if (frameEnd == frameBegin)
return;
@ -33,9 +32,9 @@ void GraphRenderer::render(const QSize &size, const frame_t *frameBegin, const f
painter.setPen(QPen{palette.color(QPalette::Text)});
painter.setBrush(palette.text());
const auto framesPerPixel = std::distance(frameBegin, frameEnd) / size.width();
const auto framesPerPixel = std::distance(frameBegin, frameEnd) / rect.width();
for (int x = 0; x < size.width(); x++)
for (int x = 0; x < rect.width(); x++)
{
const frame_t *begin = frameBegin + (x * framesPerPixel);
const frame_t *end = begin + framesPerPixel;
@ -53,7 +52,7 @@ void GraphRenderer::render(const QSize &size, const frame_t *frameBegin, const f
max[1] = (*iter)[1];
}
painter.drawLine(x, (size.height() / 2) - (min[0] * (size.height() / 2)),
x, (size.height() / 2) + (max[0] * (size.height() / 2)));
painter.drawLine(rect.x() + x, rect.y() + (rect.height() / 2) - (min[0] * (rect.height() / 2)),
rect.x() + x, rect.y() + (rect.height() / 2) + (max[0] * (rect.height() / 2)));
}
}