+QImage Spectrogram::renderHUD(uint)
+{
+
+ QTime start = QTime::currentTime();
+
+ int x, y;
+ const uint minDistY = 30; // Minimum distance between two lines
+ const uint minDistX = 40;
+ const uint textDistX = 10;
+ const uint textDistY = 25;
+ const uint topDist = m_innerScopeRect.top() - m_scopeRect.top();
+ const uint leftDist = m_innerScopeRect.left() - m_scopeRect.left();
+ const uint mouseX = m_mousePos.x() - m_innerScopeRect.left();
+ const uint mouseY = m_mousePos.y() - m_innerScopeRect.top();
+ bool hideText;
+
+ QImage hud(m_scopeRect.size(), QImage::Format_ARGB32);
+ hud.fill(qRgba(0,0,0,0));
+
+ QPainter davinci(&hud);
+ davinci.setPen(AbstractScopeWidget::penLight);
+
+
+ // Frame display
+ for (int frameNumber = 0; frameNumber < m_innerScopeRect.height(); frameNumber += minDistY) {
+ y = topDist + m_innerScopeRect.height()-1 - frameNumber;
+ hideText = m_mouseWithinWidget && abs(y - mouseY) < textDistY && mouseY < m_innerScopeRect.height() && mouseX < m_innerScopeRect.width();
+
+ davinci.drawLine(leftDist, y, leftDist + m_innerScopeRect.width()-1, y);
+ if (!hideText) {
+ davinci.drawText(leftDist + m_innerScopeRect.width() + textDistX, y + 6, QVariant(frameNumber).toString());
+ }
+ }
+ // Draw a line through the mouse position with the correct Frame number
+ if (m_mouseWithinWidget && mouseY < m_innerScopeRect.height() && mouseX < m_innerScopeRect.width()) {
+ davinci.setPen(AbstractScopeWidget::penLighter);
+
+ x = leftDist + mouseX;
+ y = topDist + mouseY - 20;
+ if (y < 0) {
+ y = 0;
+ }
+ if (y > topDist + m_innerScopeRect.height()-1 - 30) {
+ y = topDist + m_innerScopeRect.height()-1 - 30;
+ }
+ davinci.drawLine(x, topDist + mouseY, leftDist + m_innerScopeRect.width()-1, topDist + mouseY);
+ davinci.drawText(leftDist + m_innerScopeRect.width() + textDistX,
+ y,
+ m_scopeRect.right()-m_innerScopeRect.right()-textDistX,
+ 40,
+ Qt::AlignLeft,
+ i18n("Frame\n%1", m_innerScopeRect.height()-1-mouseY));
+ }
+
+ // Frequency grid
+ const uint hzDiff = ceil( ((float)minDistX)/m_innerScopeRect.width() * m_freqMax / 1000 ) * 1000;
+ const int rightBorder = leftDist + m_innerScopeRect.width()-1;
+ x = 0;
+ y = topDist + m_innerScopeRect.height() + textDistY;
+ for (uint hz = 0; x <= rightBorder; hz += hzDiff) {
+ davinci.setPen(AbstractScopeWidget::penLight);
+ x = leftDist + (m_innerScopeRect.width()-1) * ((float)hz)/m_freqMax;
+
+ // Hide text if it would overlap with the text drawn at the mouse position
+ hideText = m_mouseWithinWidget && abs(x-(leftDist + mouseX + 18)) < minDistX && mouseX < m_innerScopeRect.width();
+
+ if (x <= rightBorder) {
+ davinci.drawLine(x, topDist, x, topDist + m_innerScopeRect.height()+6);
+ }
+ if (x+textDistY < leftDist + m_innerScopeRect.width()) {
+ // Only draw the text label if there is still enough room for the final one at the right.
+ if (!hideText) {
+ davinci.drawText(x-4, y, QVariant(hz/1000).toString());
+ }
+ }
+
+
+ if (hz > 0) {
+ // Draw finer lines between the main lines
+ davinci.setPen(AbstractScopeWidget::penLightDots);
+ for (uint dHz = 3; dHz > 0; dHz--) {
+ x = leftDist + m_innerScopeRect.width() * ((float)hz - dHz * hzDiff/4.0f)/m_freqMax;
+ if (x > rightBorder) {
+ break;
+ }
+ davinci.drawLine(x, topDist, x, topDist + m_innerScopeRect.height()-1);
+ }
+ }
+ }
+ // Draw the line at the very right (maximum frequency)
+ x = leftDist + m_innerScopeRect.width()-1;
+ hideText = m_mouseWithinWidget && abs(x-(leftDist + mouseX + 24)) < minDistX && mouseX < m_innerScopeRect.width();
+ davinci.drawLine(x, topDist, x, topDist + m_innerScopeRect.height()+6);
+ if (!hideText) {
+ davinci.drawText(x-10, y, i18n("%1 kHz").arg((double)m_freqMax/1000, 0, 'f', 1));
+ }
+
+ // Draw a line through the mouse position with the correct frequency label
+ if (m_mouseWithinWidget && mouseX < m_innerScopeRect.width()) {
+ davinci.setPen(AbstractScopeWidget::penThin);
+ x = leftDist + mouseX;
+ davinci.drawLine(x, topDist, x, topDist + m_innerScopeRect.height()+6);
+ davinci.drawText(x-10, y, i18n("%1 kHz").arg((double)(m_mousePos.x()-m_innerScopeRect.left())/m_innerScopeRect.width() * m_freqMax/1000, 0, 'f', 1));
+ }
+
+ // Draw the dB brightness scale
+ float val;
+ davinci.setPen(AbstractScopeWidget::penLighter);
+ for (y = topDist; y < topDist + m_innerScopeRect.height(); y++) {
+ val = 1-((float)y-topDist)/(m_innerScopeRect.height()-1);
+ int col = qRgba(255, 255, 255, 255.0 * val);
+ for (x = leftDist-6; x >= leftDist-13; x--) {
+ hud.setPixel(x, y, col);
+ }
+ }
+ const int rectWidth = leftDist-m_scopeRect.left()-22;
+ const int rectHeight = 50;
+ davinci.setFont(QFont(QFont().defaultFamily(), 10));
+ davinci.drawText(m_scopeRect.left(), topDist, rectWidth, rectHeight, Qt::AlignRight, i18n("%1\ndB", m_dBmax));
+ davinci.drawText(m_scopeRect.left(), topDist + m_innerScopeRect.height()-20, rectWidth, rectHeight, Qt::AlignRight, i18n("%1\ndB", m_dBmin));
+
+
+ emit signalHUDRenderingFinished(start.elapsed(), 1);
+ return hud;
+}