/// <summary> Draw text with current font of indicated graphics context. </summary>
/// <param name="display"> The display pointer, that specifies the connection to the X server. <see cref="IntPtr"/> </param>
/// <param name="window"> The window to draw on. <see cref="IntPtr"/> </param>
/// <param name="gc"> The graphics context to use for drawing. <see cref="IntPtr"/> </param>
/// <param name="text"> The tyt to draw. <see cref="X11.TChar[]"/> </param>
/// <param name="area"> The area to draw within. <see cref="Rectangle"/> </param>
/// <param name="horzAlign"> The horizontal alignment (0.5F is centered). <see cref="XFloat"/> </param>
/// <param name="vertAlign"> The vertical alignment (0.5F is centered). <see cref="XFloat"/> </param>
public virtual void DrawTextLine(IntPtr display, IntPtr window, IntPtr gc, X11.TChar[] text, X11.TRectangle area, float horzAlign, float vertAlign)
{
if (display == IntPtr.Zero)
{
Console.WriteLine(CLASS_NAME + "::DrawTextLine () ERROR: Argument null: display");
return;
}
if (window == IntPtr.Zero)
{
Console.WriteLine(CLASS_NAME + "::DrawTextLine () ERROR: Argument null: window");
return;
}
if (gc == IntPtr.Zero)
{
Console.WriteLine(CLASS_NAME + "::DrawTextLine () ERROR: Argument null: gc");
return;
}
if (horzAlign < 0.0F || horzAlign > 1.0F)
{
Console.WriteLine(CLASS_NAME + "::DrawTextLine () ERROR: Argument out of range (0.0 ... 1.0): horzAlign");
if (horzAlign < 0.0F)
{
horzAlign = 0.0F;
}
if (horzAlign > 1.0F)
{
horzAlign = 1.0F;
}
}
if (vertAlign < 0.0F || vertAlign > 1.0F)
{
Console.WriteLine(CLASS_NAME + "::DrawTextLine () ERROR: Argument out of range (0.0 ... 1.0): vertAlign");
if (vertAlign < 0.0F)
{
vertAlign = 0.0F;
}
if (vertAlign > 1.0F)
{
vertAlign = 1.0F;
}
}
TSize textMeasure = MeasureTextLine(display, gc, text);
int textX = (int)((area.Width - textMeasure.Width) * horzAlign);
if (textX < _borderWidth + 2)
{
textX = _borderWidth + 2;
}
if (textX > area.Width - textMeasure.Width - _borderWidth - 2)
{
textX = area.Width - textMeasure.Width - _borderWidth - 2;
}
int textY = (int)((area.Height - textMeasure.Height) * vertAlign) + (int)(textMeasure.Height * 0.85F);
X11lib.XDrawString(display, window, gc, (TInt)((int)area.Left + (int)textX), (TInt)((int)area.Top + (int)textY), text, (X11.TInt)text.Length);
}