public Position PointToTextPosition(Point point)
{
int index, trailing;
int x = Pango.Units.FromPixels(point.X - origin.X);
int y = Pango.Units.FromPixels(point.Y - origin.Y);
layout.XyToIndex(x, y, out index, out trailing);
return(IndexToPosition(index + trailing));
}
/// <summary>
/// Get character index after which layout should be broken to not exceed maxHeight
/// </summary>
/// <returns>
/// -1 if maxHeight is smaller than top padding. -2 if maxHeight is after text and character index if maxHeight is in the middle of the text.
/// </returns>
/// <param name='g'>
/// G.
/// </param>
/// <param name='tb'>
/// Tb.
/// </param>
/// <param name='maxHeight'>
/// Max height.
/// </param>
public static int GetBreakLineCharacterIndexbyMaxHeight(this Context g, TextBlock tb, double maxHeight)
{
int result = 0;
Pango.Rectangle unused;
Pango.Rectangle te;
double vertAlgSpan = 0;
int chi = 0;
int gi = 0;
if (maxHeight > 0)
{
Pango.Layout layout = createLayoutFromTextBlock(g, tb);
layout.GetExtents(out unused, out te);
double measuredHeight = te.Height / Pango.Scale.PangoScale;
if (tb.VerticalAlignment != VerticalAlignment.Top)
{
vertAlgSpan = measureVerticlaSpan(tb, measuredHeight);
}
double realTbStart = tb.Padding.Top + vertAlgSpan;
if (realTbStart >= maxHeight)
{
result = -1;
}
else if (maxHeight > realTbStart + measuredHeight)
{
return(-2);
}
else
{
layout.XyToIndex(0, (int)((maxHeight - realTbStart) * Pango.Scale.PangoScale), out chi, out gi);
byte[] bytes = System.Text.Encoding.UTF8.GetBytes(tb.Text);
int o = System.Text.Encoding.UTF8.GetCharCount(bytes, 0, chi);
result = o;
}
(layout as IDisposable).Dispose();
}
return(result);
}
void DrawList()
{
int winWidth, winHeight;
this.GdkWindow.GetSize(out winWidth, out winHeight);
int ypos = margin;
int lineWidth = winWidth - margin * 2;
int xpos = margin + padding;
int n = 0;
while (ypos < winHeight - margin && (page + n) < win.DataProvider.IconCount)
{
string text = win.DataProvider.GetText(page + n) ?? "<null>";
layout.SetText(text);
Gdk.Pixbuf icon = win.DataProvider.GetIcon(page + n);
int iconHeight = icon != null ? icon.Height : 24;
int iconWidth = icon != null ? icon.Width : 0;
int wi, he, typos, iypos;
layout.GetPixelSize(out wi, out he);
if (wi > Allocation.Width)
{
int idx, trail;
if (layout.XyToIndex((int)((Allocation.Width - xpos - iconWidth - 2) * Pango.Scale.PangoScale), 0, out idx, out trail) && idx > 3)
{
text = text.Substring(0, idx - 3) + "...";
layout.SetText(text);
layout.GetPixelSize(out wi, out he);
}
}
typos = he < rowHeight ? ypos + (rowHeight - he) / 2 : ypos;
iypos = iconHeight < rowHeight ? ypos + (rowHeight - iconHeight) / 2 : ypos;
if (page + n == selection)
{
if (!disableSelection)
{
this.GdkWindow.DrawRectangle(this.Style.BaseGC(StateType.Selected),
true, margin, ypos, lineWidth, he + padding);
this.GdkWindow.DrawLayout(this.Style.TextGC(StateType.Selected),
xpos + iconWidth + 2, typos, layout);
}
else
{
this.GdkWindow.DrawRectangle(this.Style.BaseGC(StateType.Selected),
false, margin, ypos, lineWidth, he + padding);
this.GdkWindow.DrawLayout(this.Style.TextGC(StateType.Normal),
xpos + iconWidth + 2, typos, layout);
}
}
else
{
this.GdkWindow.DrawLayout(this.Style.TextGC(StateType.Normal),
xpos + iconWidth + 2, typos, layout);
}
if (icon != null)
{
this.GdkWindow.DrawPixbuf(this.Style.ForegroundGC(StateType.Normal), icon, 0, 0,
xpos, iypos, iconWidth, iconHeight, Gdk.RgbDither.None, 0, 0);
}
ypos += rowHeight;
n++;
//reset the markup or it carries over to the next SetText
layout.SetMarkup(string.Empty);
}
}
public bool XyToIndex(int x, int y, out int index, out int trailing)
{
return(layout.XyToIndex(x, y, out index, out trailing));
}
