// Zoom in or out (ie. change the visible time span): give a scale < 1.0
// and it zooms in, > 1.0 and it zooms out.
public void Zoom(double scale)
{
if (scale <= 0.0)
{
return;
}
grid.BeginDraw();
if (VisibleTimeSpan.Scale(scale) > TotalTime)
{
var t = TimeSpan.FromTicks(TotalTime.Ticks / grid.Width);
if (t.Ticks > 2000)
{
TimePerPixel = t;
VisibleTimeStart = TimeSpan.Zero;
}
}
else
{
var t = TimePerPixel.Scale(scale);
if (t.Ticks > 2000)
{
TimePerPixel = t;
if (VisibleTimeEnd >= TotalTime)
{
VisibleTimeStart = TotalTime - VisibleTimeSpan;
}
}
}
grid.EndDraw();
}
public void ZoomTime(double scale, Point mousePosition)
{
if (scale <= 0.0)
{
return;
}
grid.BeginDraw();
decimal gridPixelWidth = splitContainer.Panel2.Width;
TimeSpan originalTimeSpan = VisibleTimeSpan;
TimePerPixel = TimePerPixel.Scale(scale);
TimeSpan newTimeSpan = VisibleTimeSpan;
decimal timeSpanOffset = ((100 / gridPixelWidth) * (mousePosition.X - splitContainer.SplitterDistance) / 100);
VisibleTimeStart = scale > 1
? VisibleTimeStart - (pixelsToTime((int)(timeToPixels(newTimeSpan - originalTimeSpan) * (float)timeSpanOffset)))
: VisibleTimeStart + (pixelsToTime((int)(timeToPixels(originalTimeSpan - newTimeSpan) * (float)timeSpanOffset)));
grid.EndDraw();
}
// Zoom in or out (ie. change the visible time span): give a scale < 1.0
// and it zooms in, > 1.0 and it zooms out.
public void Zoom(double scale)
{
if (scale <= 0.0)
{
return;
}
if (VisibleTimeSpan.Scale(scale) > TotalTime)
{
TimePerPixel = TimeSpan.FromTicks(TotalTime.Ticks / grid.Width);
VisibleTimeStart = TimeSpan.Zero;
}
else
{
TimePerPixel = TimePerPixel.Scale(scale);
if (VisibleTimeEnd > TotalTime)
{
VisibleTimeStart = TotalTime - VisibleTimeSpan;
}
}
}
// Zoom in or out (ie. change the visible time span): give a scale < 1.0
// and it zooms in, > 1.0 and it zooms out.
public void Zoom(double scale)
{
if (scale <= 0.0)
{
return;
}
grid.BeginDraw();
if (VisibleTimeSpan.Scale(scale) > TotalTime)
{
TimePerPixel = TimeSpan.FromTicks(TotalTime.Ticks / grid.Width);
VisibleTimeStart = TimeSpan.Zero;
}
else
{
TimePerPixel = TimePerPixel.Scale(scale);
if (VisibleTimeEnd > TotalTime)
{
VisibleTimeStart = TotalTime - VisibleTimeSpan;
}
}
grid.EndDraw();
grid.ResetAllElements();
}