/// <summary>
/// 构造函数
/// Initializes a new instance of the CellImageStyle class with default settings
/// </summary>
public I3CellImageStyle()
{
this.image = null;
this.imageSizeMode = I3ImageSizeMode.Normal;
}
/// <summary>
/// Gets the Rectangle that specifies the Size and Location of
/// the Image contained in the current Cell
/// </summary>
/// <param name="image">The Image to be drawn</param>
/// <param name="sizeMode">An ImageSizeMode that specifies how the
/// specified Image is scaled</param>
/// <param name="rowAlignment">The alignment of the current Cell's row</param>
/// <param name="columnAlignment">The alignment of the current Cell's Column</param>
/// <returns>A Rectangle that specifies the Size and Location of
/// the Image contained in the current Cell</returns>
protected Rectangle CalcImageRect(Image image, I3ImageSizeMode sizeMode, I3RowAlignment rowAlignment, I3ColumnAlignment columnAlignment)
{
if (this.DrawText)
{
sizeMode = I3ImageSizeMode.ScaledToFit;
}
Rectangle imageRect = this.ClientRectangle;
if (sizeMode == I3ImageSizeMode.Normal)
{
if (image.Width < imageRect.Width)
{
imageRect.Width = image.Width;
}
if (image.Height < imageRect.Height)
{
imageRect.Height = image.Height;
}
}
else if (sizeMode == I3ImageSizeMode.ScaledToFit)
{
if (image.Width >= imageRect.Width || image.Height >= imageRect.Height)
{
double hScale = ((double)imageRect.Width) / ((double)image.Width);
double vScale = ((double)imageRect.Height) / ((double)image.Height);
double scale = Math.Min(hScale, vScale);
imageRect.Width = (int)(((double)image.Width) * scale);
imageRect.Height = (int)(((double)image.Height) * scale);
}
else
{
imageRect.Width = image.Width;
imageRect.Height = image.Height;
}
}
if (rowAlignment == I3RowAlignment.Center)
{
imageRect.Y += (this.ClientRectangle.Height - imageRect.Height) / 2;
}
else if (rowAlignment == I3RowAlignment.Bottom)
{
imageRect.Y = this.ClientRectangle.Bottom - imageRect.Height;
}
if (!this.DrawText)
{
if (columnAlignment == I3ColumnAlignment.Center)
{
imageRect.X += (this.ClientRectangle.Width - imageRect.Width) / 2;
}
else if (columnAlignment == I3ColumnAlignment.Right)
{
imageRect.X = this.ClientRectangle.Width - imageRect.Width;
}
}
return(imageRect);
}
