public void DrawTimeAxis(Graphics g, ProjectDimensions dimdim, int w, int h, VidkaProj proj)
{
// compute how many segments/ticks/etc to draw
var frameStart = dimdim.convert_ScreenX2Frame(0);
var frameEnd = dimdim.convert_ScreenX2Frame(w);
int nSegments = w / Settings.Default.MinnimumTimelineSegmentSizeInPixels;
long framesPerSegment = (frameEnd - frameStart) / nSegments;
int secondsPerSegment = (int)(framesPerSegment / proj.FrameRate);
secondsPerSegment = Utils.GetClosestSnapToSecondsForTimeAxis(secondsPerSegment);
if (secondsPerSegment == 0) // we are zoomed in so much, but still show seconds
{
secondsPerSegment = 1;
}
// now that everything is rounded, how many segments do we really have?
var actualFramesPerSegment = secondsPerSegment * proj.FrameRate;
var actualNSegments = (int)((frameEnd - frameStart) / actualFramesPerSegment);
var startingSecond = (long)Math.Floor(proj.FrameToSec(frameStart));
// compute dimensions...
var y1 = h - dimdim.getY_timeAxisHeight(h);
var y2 = h;
g.DrawLine(penGray, 0, y1, w, y1);
for (var i = 0; i < actualNSegments + 1; i++)
{
var curSecond = startingSecond + i * secondsPerSegment;
var scrX = dimdim.convert_Sec2ScreenX(curSecond);
var ts = TimeSpan.FromSeconds(curSecond);
g.DrawLine(penGray, scrX, y1, scrX, y2);
g.DrawString(ts.ToString_MinuteOrHour(), fontDefault, brushDefault, scrX + 2, y1 + 4);
}
if (secondsPerSegment == 1 && framesPerSegment <= proj.FrameRate)
{
// draw frame ticks as well
for (var i = frameStart; i < frameEnd; i++)
{
var scrX = dimdim.convert_Frame2ScreenX(i);
g.DrawLine(penGray, scrX, y1, scrX, y1 + 3);
}
}
}