/// <summary>
/// This raises the <see cref="MapValueToIndicators"/> event
/// </summary>
/// <param name="e">The event arguments</param>
protected internal virtual void OnMapValueToIndicators(MapIndicatorEventArgs e)
{
var handler = MapValueToIndicators;
if (handler != null)
{
handler(this, e);
}
}
/// <summary>
/// This raises the <see cref="MapValueToIndicators"/> event
/// </summary>
/// <param name="e">The event arguments</param>
protected internal virtual void OnMapValueToIndicators(MapIndicatorEventArgs e)
{
var handler = MapValueToIndicators;
if(handler != null)
handler(this, e);
}
/// <summary>
/// This is used to draw the cell image on behalf of the cell
/// </summary>
/// <param name="value">The current cell value</param>
/// <param name="rowIndex">The cell's row index</param>
/// <returns>The image to display or null if there is no image</returns>
protected internal Image DrawImage(object value, int rowIndex)
{
if(images == null)
return null;
int cellValue, bit, maxBit, idx, x = 0, count = images.Images.Count, width = images.ImageSize.Width;
// Create the cell bitmap on first use
if(cellImage == null)
{
cellImage = new Bitmap(((width + this.ImageSpacing) * count) - this.ImageSpacing,
images.ImageSize.Height);
imageStates = new List<bool>();
}
// Reset the current states. Assume they are on by default.
for(idx = 0; idx < count; idx++)
if(idx < imageStates.Count - 1)
imageStates[idx] = true;
else
imageStates.Add(true);
// If the underlying value is a set of bit flags, use them to set the image state
if(this.IsBitFlags && (value is int || value is short))
{
if(value is int)
{
cellValue = (int)value;
maxBit = 32;
}
else
{
cellValue = (short)value;
maxBit = 16;
}
// Don't exceed the number of images in the list
if(maxBit > count)
maxBit = count;
for(idx = 0, bit = 1; idx < maxBit; idx++, bit <<= 1)
if((cellValue & bit) == 0)
imageStates[idx] = false;
}
MapIndicatorEventArgs e = new MapIndicatorEventArgs(base.Index, rowIndex, value, imageStates);
OnMapValueToIndicators(e);
using(Graphics g = Graphics.FromImage(cellImage))
{
// Draw each image using the appropriate state
for(idx = 0; idx < count; idx++, x += width + this.ImageSpacing)
if(imageStates[idx])
g.DrawImage(images.Images[idx], x, 0);
else
ControlPaint.DrawImageDisabled(g, images.Images[idx], x, 0, Color.Transparent);
}
return cellImage;
}
/// <summary>
/// This is used to draw the cell image on behalf of the cell
/// </summary>
/// <param name="value">The current cell value</param>
/// <param name="rowIndex">The cell's row index</param>
/// <returns>The image to display or null if there is no image</returns>
protected internal Image DrawImage(object value, int rowIndex)
{
if (images == null)
{
return(null);
}
int cellValue, bit, maxBit, idx, x = 0, count = images.Images.Count, width = images.ImageSize.Width;
// Create the cell bitmap on first use
if (cellImage == null)
{
cellImage = new Bitmap(((width + this.ImageSpacing) * count) - this.ImageSpacing,
images.ImageSize.Height);
imageStates = new List <bool>();
}
// Reset the current states. Assume they are on by default.
for (idx = 0; idx < count; idx++)
{
if (idx < imageStates.Count - 1)
{
imageStates[idx] = true;
}
else
{
imageStates.Add(true);
}
}
// If the underlying value is a set of bit flags, use them to set the image state
if (this.IsBitFlags && (value is int || value is short))
{
if (value is int)
{
cellValue = (int)value;
maxBit = 32;
}
else
{
cellValue = (short)value;
maxBit = 16;
}
// Don't exceed the number of images in the list
if (maxBit > count)
{
maxBit = count;
}
for (idx = 0, bit = 1; idx < maxBit; idx++, bit <<= 1)
{
if ((cellValue & bit) == 0)
{
imageStates[idx] = false;
}
}
}
MapIndicatorEventArgs e = new MapIndicatorEventArgs(base.Index, rowIndex, value, imageStates);
OnMapValueToIndicators(e);
using (Graphics g = Graphics.FromImage(cellImage))
{
// Draw each image using the appropriate state
for (idx = 0; idx < count; idx++, x += width + this.ImageSpacing)
{
if (imageStates[idx])
{
g.DrawImage(images.Images[idx], x, 0);
}
else
{
ControlPaint.DrawImageDisabled(g, images.Images[idx], x, 0, Color.Transparent);
}
}
}
return(cellImage);
}
