internal static extern void cairo_scaled_font_extents(IntPtr scaled_font, out FontExtents extents);
internal static extern void cairo_font_extents(IntPtr cr, out FontExtents extents);
internal static extern void cairo_scaled_font_extents (IntPtr scaled_font, out FontExtents extents);
internal static extern void cairo_font_extents (IntPtr cr, out FontExtents extents);
protected override void onDraw(Context gr)
{
base.onDraw (gr);
gr.SelectFontFace (Font.Name, Font.Slant, Font.Wheight);
gr.SetFontSize (Font.Size);
gr.FontOptions = Interface.FontRenderingOptions;
gr.Antialias = Interface.Antialias;
rText = new Rectangle(new Size(
measureRawSize(LayoutingType.Width), measureRawSize(LayoutingType.Height)));
rText.Width -= 2 * Margin;
rText.Height -= 2 * Margin;
widthRatio = 1f;
heightRatio = 1f;
Rectangle cb = ClientRectangle;
rText.X = cb.X;
rText.Y = cb.Y;
if (horizontalStretch) {
widthRatio = (float)cb.Width / (float)rText.Width;
if (!verticalStretch)
heightRatio = widthRatio;
}
if (verticalStretch) {
heightRatio = (float)cb.Height / (float)rText.Height;
if (!horizontalStretch)
widthRatio = heightRatio;
}
rText.Width = (int)(widthRatio * (float)rText.Width);
rText.Height = (int)(heightRatio * (float)rText.Height);
switch (TextAlignment)
{
case Alignment.TopLeft: //ok
rText.X = cb.X;
rText.Y = cb.Y;
break;
case Alignment.Top: //ok
rText.Y = cb.Y;
rText.X = cb.X + cb.Width / 2 - rText.Width / 2;
break;
case Alignment.TopRight: //ok
rText.Y = cb.Y;
rText.X = cb.Right - rText.Width;
break;
case Alignment.Left://ok
rText.X = cb.X;
rText.Y = cb.Y + cb.Height / 2 - rText.Height / 2;
break;
case Alignment.Right://ok
rText.X = cb.X + cb.Width - rText.Width;
rText.Y = cb.Y + cb.Height / 2 - rText.Height / 2;
break;
case Alignment.Bottom://ok
rText.X = cb.Width / 2 - rText.Width / 2;
rText.Y = cb.Height - rText.Height;
break;
case Alignment.BottomLeft://ok
rText.X = cb.X;
rText.Y = cb.Bottom - rText.Height;
break;
case Alignment.BottomRight://ok
rText.Y = cb.Bottom - rText.Height;
rText.X = cb.Right - rText.Width;
break;
case Alignment.Center://ok
rText.X = cb.X + cb.Width / 2 - rText.Width / 2;
rText.Y = cb.Y + cb.Height / 2 - rText.Height / 2;
break;
}
gr.FontMatrix = new Matrix(widthRatio * (float)Font.Size, 0, 0, heightRatio * (float)Font.Size, 0, 0);
fe = gr.FontExtents;
#region draw text cursor
if (HasFocus && Selectable)
{
if (mouseLocalPos >= 0)
{
computeTextCursor(gr);
if (SelectionInProgress)
{
if (SelBegin < 0){
SelBegin = new Point(CurrentColumn, CurrentLine);
SelStartCursorPos = textCursorPos;
SelRelease = -1;
}else{
SelRelease = new Point(CurrentColumn, CurrentLine);
if (SelRelease == SelBegin)
SelRelease = -1;
else
SelEndCursorPos = textCursorPos;
}
}
}else
computeTextCursorPosition(gr);
Foreground.SetAsSource (gr);
gr.LineWidth = 1.0;
gr.MoveTo (0.5 + textCursorPos + rText.X, rText.Y + CurrentLine * fe.Height);
gr.LineTo (0.5 + textCursorPos + rText.X, rText.Y + (CurrentLine + 1) * fe.Height);
gr.Stroke();
}
#endregion
//****** debug selection *************
// if (SelRelease >= 0) {
// gr.Color = Color.Green;
// Rectangle R = new Rectangle (
// rText.X + (int)SelEndCursorPos - 2,
// rText.Y + (int)(SelRelease.Y * fe.Height),
// 4,
// (int)fe.Height);
// gr.Rectangle (R);
// gr.Fill ();
// }
// if (SelBegin >= 0) {
// gr.Color = Color.UnmellowYellow;
// Rectangle R = new Rectangle (
// rText.X + (int)SelStartCursorPos - 2,
// rText.Y + (int)(SelBegin.Y * fe.Height),
// 4,
// (int)fe.Height);
// gr.Rectangle (R);
// gr.Fill ();
// }
//*******************
for (int i = 0; i < lines.Count; i++) {
string l = lines [i].Replace ("\t", new String (' ', Interface.TabSize));
int lineLength = (int)gr.TextExtents (l).XAdvance;
Rectangle lineRect = new Rectangle (
rText.X,
rText.Y + (int)Math.Ceiling(i * fe.Height),
lineLength,
(int)Math.Ceiling(fe.Height));
// if (TextAlignment == Alignment.Center ||
// TextAlignment == Alignment.Top ||
// TextAlignment == Alignment.Bottom)
// lineRect.X += (rText.Width - lineLength) / 2;
// else if (TextAlignment == Alignment.Right ||
// TextAlignment == Alignment.TopRight ||
// TextAlignment == Alignment.BottomRight)
// lineRect.X += (rText.Width - lineLength);
if (Selectable) {
if (SelRelease >= 0 && i >= selectionStart.Y && i <= selectionEnd.Y) {
gr.SetSourceColor (selBackground);
Rectangle selRect = lineRect;
int cpStart = (int)SelStartCursorPos,
cpEnd = (int)SelEndCursorPos;
if (SelBegin.Y > SelRelease.Y) {
cpStart = cpEnd;
cpEnd = (int)SelStartCursorPos;
}
if (i == selectionStart.Y) {
selRect.Width -= cpStart;
selRect.Left += cpStart;
}
if (i == selectionEnd.Y)
selRect.Width -= (lineLength - cpEnd);
gr.Rectangle (selRect);
gr.Fill ();
}
}
if (string.IsNullOrWhiteSpace (l))
continue;
Foreground.SetAsSource (gr);
gr.MoveTo (lineRect.X, rText.Y + fe.Ascent + fe.Height * i);
gr.ShowText (l);
gr.Fill ();
}
}
protected override int measureRawSize(LayoutingType lt)
{
if (lines == null)
lines = getLines;
using (ImageSurface img = new ImageSurface (Format.Argb32, 10, 10)) {
using (Context gr = new Context (img)) {
//Cairo.FontFace cf = gr.GetContextFontFace ();
gr.SelectFontFace (Font.Name, Font.Slant, Font.Wheight);
gr.SetFontSize (Font.Size);
fe = gr.FontExtents;
te = new TextExtents();
if (lt == LayoutingType.Height){
int lc = lines.Count;
//ensure minimal height = text line height
if (lc == 0)
lc = 1;
return (int)Math.Ceiling(fe.Height * lc) + Margin * 2;
}
foreach (string s in lines) {
string l = s.Replace("\t", new String (' ', Interface.TabSize));
TextExtents tmp = gr.TextExtents (l);
if (tmp.XAdvance > te.XAdvance)
te = tmp;
}
return (int)Math.Ceiling (te.XAdvance) + Margin * 2;
}
}
}
