// Insert a bar item at a specified index
protected void InsertItem(int nIndex, HBarData item)
{
arrItem.Insert(nIndex, item);
if (dMaximumValue < item.Value)
{
dMaximumValue = item.Value;
}
}
// Get a bar item
public bool GetAt(int nIndex, out HBarData bar)
{
bar = null;
if (nIndex < 0 || arrItem.Count <= nIndex)
{
return(false);
}
bar = ((HBarData)arrItem[nIndex]);
return(true);
}
// Add a new bar item
protected void AddItem(HBarData item)
{
arrItem.Add(item);
// Set first value as the maximum. If control modified to support negeative numbers
// This will help to calculate true maximum, the reason is that the default is 0
// which is always bigger than negative values, thus it's always bigger than all
// values, while maximum value of array is something else(it's also negative) not 0
if (arrItem.Count == 1)
{
dMaximumValue = item.Value;
}
else if (dMaximumValue < item.Value)
{
dMaximumValue = item.Value;
}
}
// Insert a bar at a specified index
protected void InsertItem(int nIndex, double dValue, string strLabel, Color colorBar)
{
HBarData item = new HBarData(dValue, strLabel, colorBar);
InsertItem(nIndex, item);
}
// Add a new bar
protected void AddItem(double dValue, string strLabel, Color colorBar)
{
HBarData item = new HBarData(dValue, strLabel, colorBar);
AddItem(item);
}
// Draw a bar with label & valu using specified index bouned to the
// specified rectangle of the selected bitmap of specified graphics object
private void DrawBar(Graphics gr, RectangleF rectBar, HBarData bar)
{
// Some calculations
if (rectBar.Height <= 0)
{
rectBar.Height = 1;
}
int nAlphaStart = (int)(185 + 5 * rectBar.Width / 24),
nAlphaEnd = (int)(10 + 4 * rectBar.Width / 24);
if (nAlphaStart > 255)
{
nAlphaStart = 255;
}
else if (nAlphaStart < 0)
{
nAlphaStart = 0;
}
if (nAlphaEnd > 255)
{
nAlphaEnd = 255;
}
else if (nAlphaEnd < 0)
{
nAlphaEnd = 0;
}
Color ColorBacklight = bar.Color;
Color ColorBacklightEnd = Color.FromArgb(50, 0, 0, 0);
Color ColorGlowStart = Color.FromArgb(nAlphaEnd, 255, 255, 255);
Color ColorGlowEnd = Color.FromArgb(nAlphaStart, 255, 255, 255);
Color ColorFillBK = GetDarkerColor(bar.Color, 85);
Color ColorBorder = GetDarkerColor(bar.Color, 100);
// Draw a single bar.
#region BarItself
RectangleF er = new RectangleF(rectBar.Left, rectBar.Top - rectBar.Height / 2, rectBar.Width * 2, rectBar.Height * 2);
GraphicsPath rctPath = new GraphicsPath();
rctPath.AddEllipse(er);
PathGradientBrush pgr = new PathGradientBrush(rctPath);
pgr.CenterPoint = new PointF(rectBar.Right, rectBar.Top + rectBar.Height / 2);
pgr.CenterColor = ColorBacklight;
pgr.SurroundColors = new Color[] { ColorBacklightEnd };
RectangleF rectGlow = new RectangleF(rectBar.Left, rectBar.Top, rectBar.Width / 2, rectBar.Height);
LinearGradientBrush brGlow = new LinearGradientBrush(
new PointF(rectGlow.Right + 1, rectGlow.Top), new PointF(rectGlow.Left - 1, rectGlow.Top),
ColorGlowStart, ColorGlowEnd);
gr.FillRectangle(new SolidBrush(ColorFillBK), rectBar);
//gr.FillRectangle(new SolidBrush(Color.FromArgb(255, 0, 0, 0)), rectBar);
gr.FillRectangle(pgr, rectBar);
gr.FillRectangle(brGlow, rectGlow);
gr.DrawRectangle(new Pen(ColorBorder, 1), rectBar.Left, rectBar.Top, rectBar.Width, rectBar.Height);
#endregion
// Draw label
if (Label.Visible)
{
float nLabelHeight = Label.Font.GetHeight(gr);
gr.DrawString(
bar.Label,
Label.Font,
new SolidBrush(Label.Color),
new RectangleF(
rectBar.X,
rectBar.Bottom + nBarsGap,
rectBar.Width,
nLabelHeight));
}
// Draw value or %
if (Values.Visible)
{
string strValue = string.Empty;
if (Values.Mode == CValueProperty.ValueMode.Digit)
{
strValue = bar.Value.ToString("F1");
}
else if (Values.Mode == CValueProperty.ValueMode.Percent)
{
double dTotal = bars.TotalValue;
if (dTotal > 0)
{
strValue =
((double)(bar.Value / dTotal)).ToString("P1",
System.Globalization.CultureInfo.CurrentCulture);
}
}
float fValueHeight = Values.Font.GetHeight(gr);
gr.DrawString(
strValue,
Values.Font,
new SolidBrush(Values.Color),
new RectangleF(
rectBar.X,
rectBar.Top - fValueHeight - 1,
rectBar.Width + 2 * nBarsGap,
fValueHeight));
}
}
private void CreateLabelFont(Graphics gr, SizeF sizeBar)
{
float fFontSize = 100 + (sizeBar.Width / 24);
if (fFontSize <= 0)
{
fFontSize = 1;
}
// Set font style
string strFontName;
FontStyle fntStyle;
if (Label.Font == null)
{
strFontName = "Tahoma";
fntStyle = FontStyle.Regular;
}
else
{
strFontName = Label.Font.Name;
fntStyle = Label.Font.Style;
}
Label.Font = new Font(strFontName, fFontSize, fntStyle);
// Get lengthiest label
HBarData bar = null;
SizeF sizeMax = new SizeF(0, 0);
SizeF sizeText;
for (int i = 0; i < bars.Count; i++)
{
if (bars.GetAt(i, out bar))
{
sizeText = gr.MeasureString(bar.Label, Label.Font);
if (sizeText.Width > sizeMax.Width)
{
sizeMax = sizeText;
}
}
}
sizeText = sizeMax;
// Fit text in client area if needed
if (sizeText.Width > sizeBar.Width)
{
float fWidthRatio = sizeBar.Width / sizeText.Width;
fFontSize = (Label.Font.Size * fWidthRatio);
// Recreate font if needed
if (fFontSize > 0)
{
Label.Font.Dispose();
Label.Font = null;
Label.Font = new Font(strFontName, fFontSize, fntStyle);
}
}
}
private void CreateValueFont(Graphics gr, SizeF sizeBar)
{
// Set font style
string strFontName;
FontStyle fntStyle;
float fFontSize = 100 + (sizeBar.Width / 24);
if (fFontSize <= 0)
{
fFontSize = 1;
}
if (Values.Font == null)
{
strFontName = "Tahoma";
fntStyle = FontStyle.Regular;
}
else
{
strFontName = Values.Font.Name;
fntStyle = Values.Font.Style;
}
Values.Font = new Font(strFontName, fFontSize, fntStyle);
// Get lengthiest label
HBarData bar = null;
string strValue = string.Empty;
string strLargestValue = string.Empty;
double dTotal = bars.TotalValue;
for (int i = 0; i < bars.Count; i++)
{
if (bars.GetAt(i, out bar))
{
if (Values.Mode == CValueProperty.ValueMode.Digit)
{
strValue = String.Format("{0:F1}", bar.Value);
}
else if (Values.Mode == CValueProperty.ValueMode.Percent)
{
if (dTotal > 0)
{
strValue = ((double)(bar.Value / dTotal)).ToString("P1", System.Globalization.CultureInfo.CurrentCulture);
}
}
if (strValue.Length > strLargestValue.Length)
{
strLargestValue = strValue;
}
}
}
SizeF sizeText = gr.MeasureString(strValue, Values.Font);
// Fit text in client area if needed
if (sizeText.Width > sizeBar.Width)
{
float fWidthRatio = sizeBar.Width / sizeText.Width;
fFontSize = (Values.Font.Size * fWidthRatio);
// Recreate font if needed
if (fFontSize > 0)
{
Values.Font.Dispose();
Values.Font = null;
Values.Font = new Font(strFontName, fFontSize, fntStyle);
}
}
}
public bool GetAt(int nIndex, out HBarData bar)
{
return(bars.GetAt(nIndex, out bar));
}