protected SliderTrackBarRenderer(SliderTrackBar trackBar)
{
if (trackBar == null)
{
throw new Exception("You have to pass the TrackBar object in the constructor!");
}
_trackBar = trackBar;
}
public HorizontalSliderTrackBarRenderer(SliderTrackBar trackBar) : base(trackBar)
{
if (trackBar == null)
{
throw new Exception("You have to pass the TrackBar object in the constructor!");
}
_trackBar = trackBar;
}
public int CalculateTickCount(SliderTrackBar trackBar)
{
int width = trackBar.Orientation == Orientation.Horizontal ? trackBar.Width : trackBar.Height;
int tickCount = (int)Math.Floor(((double)width + (double)trackBar.TickSpacing) / ((double)trackBar.TickWidth + (double)trackBar.TickSpacing));
if (trackBar.TickEmphasizeMinMaxAndZero && tickCount % 2 != 0)
{
tickCount -= 1;
}
return(tickCount);
}
public int CalculateTotalTickWidth(SliderTrackBar trackBar, int tickCount)
{
return((tickCount * trackBar.TickWidth) + ((tickCount - 1) * trackBar.TickSpacing));
}
public Dictionary <int, int> CalculateScaleFieldHeights(SliderTrackBar trackBar, int fieldCount)
{
Dictionary <int, int> heightList = new Dictionary <int, int>();
if (fieldCount > 0)
{
double stepWidth;
if (trackBar.Maximum >= trackBar.Minimum)
{
//Normal
if ((trackBar.Maximum >= 0 && trackBar.Minimum >= 0) || (trackBar.Maximum <= 0 && trackBar.Minimum <= 0))
{
stepWidth = 100 / ((double)fieldCount - 1);
for (int i = 0; i < fieldCount; i++)
{
double stepValue = i * stepWidth;
int absoluteStepValue = (int)Math.Abs(stepValue);
double fraction = (double)absoluteStepValue / 100;
double height = (fraction * ((double)trackBar.ScaleFieldMaxHeight - 2)) + 2;
heightList.Add(i, (int)height);
}
}
else
{
stepWidth = ((double)trackBar.Maximum - (double)trackBar.Minimum) / ((double)fieldCount - 1);
for (int i = 0; i < fieldCount; i++)
{
double stepValue = (double)trackBar.Minimum + i * stepWidth;
int absoluteStepValue = (int)Math.Abs(stepValue);
double fraction;
if (trackBar.ScaleFieldEqualizeHeights)
{
if (stepValue < 0)
{
fraction = (double)absoluteStepValue / (double)Math.Abs(trackBar.Minimum);
}
else
{
fraction = (double)absoluteStepValue / (double)Math.Abs(trackBar.Maximum);
}
}
else
{
fraction = (double)absoluteStepValue / (double)Math.Max(Math.Abs(trackBar.Maximum), Math.Abs(trackBar.Minimum));
}
double height = (fraction * ((double)trackBar.ScaleFieldMaxHeight - 2)) + 2;
heightList.Add(i, (int)height);
}
}
}
else
{
//Turn that thing around...
if ((trackBar.Maximum >= 0 && trackBar.Minimum >= 0) || (trackBar.Maximum <= 0 && trackBar.Minimum <= 0))
{
stepWidth = 100 / ((double)fieldCount - 1);
for (int i = 0; i < fieldCount; i++)
{
double stepValue = 100 - i * stepWidth;
int absoluteStepValue = (int)Math.Abs(stepValue);
double fraction = (double)absoluteStepValue / 100;
double height = (fraction * ((double)trackBar.ScaleFieldMaxHeight - 2)) + 2;
heightList.Add(i, (int)height);
}
}
else
{
stepWidth = ((double)trackBar.Minimum - (double)trackBar.Maximum) / ((double)fieldCount - 1);
for (int i = 0; i < fieldCount; i++)
{
double stepValue = (double)trackBar.Minimum - i * stepWidth;
int absoluteStepValue = (int)Math.Abs(stepValue);
double fraction;
if (trackBar.ScaleFieldEqualizeHeights)
{
if (stepValue < 0)
{
fraction = (double)absoluteStepValue / (double)Math.Abs(trackBar.Maximum);
}
else
{
fraction = (double)absoluteStepValue / (double)Math.Abs(trackBar.Minimum);
}
}
else
{
fraction = (double)absoluteStepValue / (double)Math.Max(Math.Abs(trackBar.Maximum), Math.Abs(trackBar.Minimum));
}
double height = (fraction * ((double)trackBar.ScaleFieldMaxHeight - 2)) + 2;
heightList.Add(i, (int)height);
}
}
}
}
return(heightList);
}
public int CalculateTotalScaleWidth(SliderTrackBar trackBar, int fieldCount)
{
return((fieldCount * trackBar.ScaleFieldWidth) + ((fieldCount - 1) * trackBar.ScaleFieldSpacing));
}
public int CalculateScaleFieldCount(SliderTrackBar trackBar)
{
int width = trackBar.Orientation == Orientation.Horizontal ? trackBar.Width : trackBar.Height;
return((int)Math.Floor(((double)width + (double)trackBar.ScaleFieldSpacing) / ((double)trackBar.ScaleFieldWidth + (double)trackBar.ScaleFieldSpacing)));
}