Method resizeEvent

src/interface/WidgetMarqueeLabel.cpp:107–149

}

void ScrollText::resizeEvent(QResizeEvent*)
{
	// When the widget is resized, we need to update the alpha channel.

	alphaChannel = QImage(size(), QImage::Format_ARGB32_Premultiplied);
	buffer       = QImage(size(), QImage::Format_ARGB32_Premultiplied);

	// Create Alpha Channel:
	if (width() > 64)
	{
		// create first scanline
		QRgb *scanline1 = (QRgb*) alphaChannel.scanLine(0);

		for (int x = 1; x < 16; ++x)
		{
			scanline1[x - 1] = scanline1[width() - x] = qRgba(0, 0, 0, x << 4);
		}

		for (int x = 15; x < width() - 15; ++x)
		{
			scanline1[x] = qRgb(0, 0, 0);
		}

		// copy scanline to the other ones
		for (int y = 1; y < height(); ++y)
		{
			memcpy(alphaChannel.scanLine(y), (uchar*) scanline1, width() * 4);
		}
	}
	else
	{
		alphaChannel.fill(qRgb(0, 0, 0));
	}


	// Update scrolling state
	bool newScrollEnabled = (singleTextWidth > width() - leftMargin);

	if (newScrollEnabled != scrollEnabled)
	{
		updateText();
	}
}

void ScrollText::timer_timeout()
{