public Pango.FontMetrics GetMetrics(Pango.FontDescription desc, Pango.Language language)
{
IntPtr raw_ret = pango_context_get_metrics(Handle, desc == null ? IntPtr.Zero : desc.Handle, language == null ? IntPtr.Zero : language.Handle);
Pango.FontMetrics ret = raw_ret == IntPtr.Zero ? null : (Pango.FontMetrics)GLib.Opaque.GetOpaque(raw_ret, typeof(Pango.FontMetrics), false);
return(ret);
}
private void OnTextViewSizeRequested(object o, SizeRequestedArgs args)
{
Pango.FontMetrics metrics = PangoContext.GetMetrics(entry.Style.FontDescription, PangoContext.Language);
int line_height = ((int)(metrics.Ascent + metrics.Descent) + 512) >> 10; // PANGO_PIXELS(d)
metrics.Dispose();
HeightRequest = (line_height + 2) * 2;
}
protected override void OnGetPreferredHeight(out int minimum_height, out int natural_height)
{
int line_height;
using (Pango.FontMetrics metrics = PangoContext.GetMetrics(
entry.StyleContext.GetFont(StateFlags.Normal), PangoContext.Language)) {
line_height = ((metrics.Ascent + metrics.Descent) + 512) >> 10; // PANGO_PIXELS(d)
}
minimum_height = natural_height = (line_height + 2) * 2;
}
protected override void UpdateLayout()
{
System.Console.WriteLine("in update layout {0}", Allocation.ToString());
int num_thumbnails;
if (collection != null)
{
num_thumbnails = collection.Count;
}
else
{
num_thumbnails = 0;
}
cells_per_row = System.Math.Max(num_thumbnails, 1);
int num_rows = 1;
int num_cols = num_thumbnails;
int available_height = Allocation.Height - 2 * BORDER_SIZE;
if (DisplayTags)
{
available_height -= tag_icon_size + tag_icon_vspacing;
}
if (DisplayDates && this.Style != null)
{
Pango.FontMetrics metrics = this.PangoContext.GetMetrics(this.Style.FontDescription,
Pango.Language.FromString("en_US"));
available_height -= PangoPixels(metrics.Ascent + metrics.Descent);
}
thumbnail_width = (int)(available_height / thumbnail_ratio);
cell_width = ThumbnailWidth + 2 * cell_border_width;
cell_height = ThumbnailHeight + 2 * cell_border_width;
SetSize(System.Math.Max(((uint)(num_cols * cell_width + 2 * BORDER_SIZE)), (uint)Allocation.Width), (uint)(num_rows * cell_height + 2 * BORDER_SIZE));
Vadjustment.StepIncrement = cell_height;
Vadjustment.Change();
Hadjustment.StepIncrement = cell_width;
Hadjustment.Change();
}
public TextBox(int nlines)
{
ShadowType = Gtk.ShadowType.In;
SetPolicy(Gtk.PolicyType.Never, Gtk.PolicyType.Automatic);
textview = new Gtk.TextView();
textview.WrapMode = Gtk.WrapMode.Word;
textview.Show();
Add(textview);
Pango.Context ctx = textview.PangoContext;
Pango.FontMetrics metrics = ctx.GetMetrics(textview.Style.FontDescription,
ctx.Language);
int lineHeight = (metrics.Ascent + metrics.Descent) / (int)Pango.Scale.PangoScale;
SetSizeRequest(-1, lineHeight * nlines);
textview.Buffer.Changed += Buffer_Changed;
}
private int LegendHeight()
{
int max_height = 0;
Pango.FontMetrics metrics = this.PangoContext.GetMetrics(this.Style.FontDescription,
Pango.Language.FromString("en_US"));
max_height += PangoPixels(metrics.Ascent + metrics.Descent);
foreach (Pango.Layout l in tick_layouts)
{
if (l != null)
{
int width, height;
l.GetPixelSize(out width, out height);
max_height = Math.Max(height, max_height);
}
}
return((int)(max_height * 1.5));
}
protected override void OnSizeRequested(ref Gtk.Requisition requisition)
{
EnsureStyle();
Pango.FontMetrics metrics = PangoContext.GetMetrics(Style.FontDescription, PangoContext.Language);
renderer.Size = ((int)(metrics.Ascent + metrics.Descent) + 512) >> 10; // PANGO_PIXELS(d)
metrics.Dispose();
if (HasFrame)
{
renderer.Xpad = Style.Xthickness + (interior_focus ? focus_width : 0) + 2;
renderer.Ypad = Style.Ythickness + (interior_focus ? focus_width : 0) + 2;
}
else
{
renderer.Xpad = 0;
renderer.Ypad = 0;
}
requisition.Width = renderer.Width;
requisition.Height = renderer.Height;
}
protected Requisition SizeRequested()
{
var requisition = new Requisition();
Pango.FontMetrics metrics = PangoContext.GetMetrics(StyleContext.GetFont(StateFlags), PangoContext.Language);
renderer.Size = ((int)(metrics.Ascent + metrics.Descent) + 512) >> 10; // PANGO_PIXELS(d)
metrics.Dispose();
if (HasFrame)
{
renderer.Xpad = MarginLeft + (interior_focus ? focus_width : 0) + 2;
renderer.Ypad = MarginTop + (interior_focus ? focus_width : 0) + 2;
}
else
{
renderer.Xpad = 0;
renderer.Ypad = 0;
}
requisition.Width = renderer.Width;
requisition.Height = renderer.Height;
return(requisition);
}
public void DrawText(int x, int y, String text, TextAlign align)
{
Pango.FontDescription fd = Pango.FontDescription.FromString(FontFamily);
fd.Size = Pango.Units.FromPixels(FontSize);
if ((FontStyle & FontStyle.Bold) != 0)
{
fd.Weight = Pango.Weight.Bold;
}
if ((FontStyle & FontStyle.Italic) != 0)
{
fd.Style = Pango.Style.Italic;
}
Pango.Font font = parent.PangoContext.LoadFont(fd);
Pango.Language lang = Pango.Language.FromString("en");
Pango.FontMetrics metrics = font.GetMetrics(lang);
int estWidth = text.Length * metrics.ApproximateCharWidth * 3 / 2;
Pango.Context pango = parent.PangoContext;
Pango.Layout layout = new Pango.Layout(pango)
{
Width = estWidth,
Wrap = Pango.WrapMode.Word, Alignment = Pango.Alignment.Left,
FontDescription = fd
};
int color = this.Color;
ushort cRed = (ushort)((color >> 16) & 0xFF);
ushort cGreen = (ushort)((color >> 8) & 0xFF);
ushort cBlue = (ushort)(color & 0xFF);
layout.Attributes = new Pango.AttrList();
layout.Attributes.Insert(new Pango.AttrForeground(cRed, cGreen, cBlue));
layout.SetText(text);
double x0;
double y0;
double scale = 1.0 / Pango.Scale.PangoScale;
Pango.Rectangle dummy;
Pango.Rectangle extents;
layout.GetExtents(out dummy, out extents);
switch ((TextAlign)((int)align & 7))
{
case TextAlign.Right:
x0 = x - scale * extents.Width;
break;
case TextAlign.Center:
x0 = x - 0.5 * scale * extents.Width;
break;
default:
x0 = x;
break;
}
switch ((TextAlign)((int)align & ~7))
{
case TextAlign.Top:
y0 = y;
break;
case TextAlign.Bottom:
y0 = y - scale * (metrics.Ascent + metrics.Descent);
break;
case TextAlign.VCenter:
y0 = y - 0.5 * scale * metrics.Ascent;
break;
default:
y0 = y - scale * metrics.Ascent;
break;
}
Matrix srcM = Context.Matrix;
Pango.Matrix dstM;
dstM.X0 = 0.0;
dstM.Xx = srcM.Xx;
dstM.Xy = srcM.Xy;
dstM.Y0 = 0.0;
dstM.Yx = srcM.Yx;
dstM.Yy = srcM.Yy;
parent.PangoContext.Matrix = dstM;
srcM.TransformPoint(ref x0, ref y0);
parent.GdkWindow.DrawLayout(parent.Style.TextGC(StateType.Normal),
(int)(0.5 + x0), (int)(0.5 + y0), layout);
dstM.Xx = 1.0;
dstM.Yy = 1.0;
parent.PangoContext.Matrix = dstM;
}
