protected void UpdateTexture ()
{
text.SetSurfaceSize ((uint) (Width+MarginX),(uint) (Height+MarginY));
text.Clear ();
Cairo.Context context = text.Create ();
double lwidth = 1;
double hlwidth = lwidth*0.5;
double width = Width - lwidth;
double height = Height - lwidth;
double radius = Math.Min(marginX, marginY)*0.75;
if ((radius > height / 2) || (radius > width / 2))
radius = Math.Min(height / 2, width / 2);
context.MoveTo (hlwidth, hlwidth + radius);
context.Arc (hlwidth + radius, hlwidth + radius, radius, Math.PI, -Math.PI / 2);
context.LineTo (hlwidth + width - radius, hlwidth);
context.Arc (hlwidth + width - radius, hlwidth + radius, radius, -Math.PI / 2, 0);
context.LineTo (hlwidth + width, hlwidth + height - radius);
context.Arc (hlwidth + width - radius, hlwidth + height - radius, radius, 0, Math.PI / 2);
context.LineTo (hlwidth + radius, hlwidth + height);
context.Arc (hlwidth + radius, hlwidth + height - radius, radius, Math.PI / 2, Math.PI);
context.ClosePath ();
context.LineWidth = lwidth;
context.SetSourceRGB (1.0,1.0,1.0);
context.Stroke ();
((IDisposable) context.Target).Dispose ();
((IDisposable) context).Dispose ();
}
public static void MakeReflection(Cairo.ImageSurface source, CairoTexture dest)
{
int w = source.Width + 4;
int h = source.Height * 2 + 4;
dest.SetSurfaceSize((uint)w, (uint)h);
Cairo.Context context = dest.Create();
MakeReflection(context, source, w, h);
//((IDisposable) context.Target).Dispose ();
((IDisposable)context).Dispose();
}
/// <summary>
/// Draws the button into the texture
/// </summary>
/// <param name="actor">
/// A <see cref="CairoTexture"/>
/// </param>
protected void Draw (CairoTexture actor)
{
double x = 0.5, y = 0.5;
double r = (texture_height - x - y) / 2;
Cairo.Context cr = actor.Create ();
if ((Borders & Border.Right) == Border.Right)
cr.Arc (-x+texture_width-r, y+r, r, -Math.PI/2, Math.PI/2);
else {
cr.MoveTo (x+r,y);
cr.LineTo (-x+texture_width, y);
cr.LineTo (-x+texture_width, y+2*r);
}
if ((Borders & Border.Left) == Border.Left)
cr.Arc (x+r, y+r, r, Math.PI/2, -Math.PI/2);
else {
cr.LineTo (x, y+2*r);
cr.LineTo (x, y);
}
cr.ClosePath ();
cr.Color = Style.Background;
cr.FillPreserve();
cr.Color = Style.Border;
cr.LineWidth = Style.BorderSize;
cr.Stroke ();
cr.Color = Style.Standard.Color;
cr.SelectFontFace (Style.Standard.Family, Style.Standard.Slant, Style.Standard.Weight);
cr.SetFontSize (Style.Standard.Size);
TextExtents te = cr.TextExtents (Text);
cr.MoveTo ((texture_width-te.Width)/2,2*r-texture_height/4);
cr.FontOptions.HintStyle = HintStyle.Full;
cr.ShowText (Text);
((IDisposable) cr.Target).Dispose ();
((IDisposable) cr).Dispose ();
}
protected virtual void SetupBackground()
{
background.Clear();
Cairo.Context context = background.Create();
double lwidth = 1;
double hlwidth = lwidth * 0.5;
double margin = Margin;
//left curvature:
context.MoveTo(-hlwidth, -hlwidth);
context.CurveTo(margin * 0.33, -hlwidth,
margin * 0.5, Height * 0.4,
margin * 0.5, Height * 0.5);
context.CurveTo(margin * 0.5, Height * 0.6,
margin * 0.66, Height - hlwidth,
margin - hlwidth, Height - hlwidth);
//straight bottom:
context.LineTo(Width - margin - hlwidth, Height - hlwidth);
//right curvature:
context.CurveTo(Width - margin * 0.66, Height - hlwidth,
Width - margin * 0.5, Height * 0.6,
Width - margin * 0.5, Height * 0.5);
context.CurveTo(Width - margin * 0.5, Height * 0.4,
Width - margin * 0.33, -hlwidth,
Width - hlwidth, -hlwidth);
//straight top:
context.LineTo(-hlwidth, -hlwidth);
context.ClosePath();
context.LineWidth = lwidth;
context.SetSourceRGBA(1.0, 1.0, 1.0, 1.0);
context.StrokePreserve();
context.SetSourceRGBA(1.0, 1.0, 1.0, 0.10);
context.Fill();
((IDisposable)context.Target).Dispose();
((IDisposable)context).Dispose();
}
/// <summary>
/// Generates the undlying texture
/// </summary>
protected override void GenerateTextures ()
{
double x = 5+0.5, y = 5+0.5;
double r = (texture_width - x - y) / 2;
CairoTexture actor = new CairoTexture (texture_width,texture_height);
Cairo.Context context = actor.Create ();
context.Arc (x+r, y+r, r, 0, 2*Math.PI);
context.ClosePath ();
context.Color = Style.Background;
context.FillPreserve ();
context.Color = Style.Border;
context.LineWidth = Style.BorderSize;
context.Stroke ();
context.Color = Style.Foreground;
context.MoveTo (x+5,texture_height /2);
context.LineTo (texture_width-5-x, texture_height /2);
context.LineWidth = 2.0;
context.Stroke ();
if (inward)
{
context.MoveTo (texture_width /2,y+5);
context.LineTo (texture_width /2,texture_height-5-y);
context.Stroke ();
}
((IDisposable) context.Target).Dispose ();
((IDisposable) context).Dispose ();
textures.Add (actor);
}
public virtual void Update()
{
outline.Clear();
Cairo.Context context = outline.Create();
context.LineWidth = line_width;
context.MoveTo(outline.Height * 0.5, 0.5);
context.Arc(outline.Width - outline.Height * 0.5, outline.Height * 0.5, (outline.Height - line_width) * 0.5, 1.5 * Math.PI, 0.5 * Math.PI);
context.Arc(outline.Height * 0.5, outline.Height * 0.5, (outline.Height - line_width) * 0.5, 0.5 * Math.PI, 1.5 * Math.PI);
context.ClosePath();
context.SetSourceRGBA(1.0, 1.0, 1.0, 0.2);
context.FillPreserve();
context.SetSourceRGB(1.0, 1.0, 1.0);
context.Stroke();
((IDisposable)context.Target).Dispose();
((IDisposable)context).Dispose();
handle.Update();
handle.RaiseTop();
arrow_left.Update();
arrow_right.Update();
}
/// <summary>
/// Redraws the circle_prototype which is used for all circles as template.
/// This means a new circle is drawn with cairo and stored in a texture.
/// </summary>
static private void UpdatePrototype (CairoTexture actor, double r, double g, double b, double a,
double arc, double a_r, double a_g, double a_b)
{
double size = (double)circle_size;
actor.Clear();
Cairo.Context context = actor.Create();
Cairo.Gradient pattern = new Cairo.RadialGradient(size/2.0,size/2.0,size/3.0,
size/2.0,size/2.0,size/2.0);
pattern.AddColorStop(0,new Cairo.Color (r,g,b,a));
pattern.AddColorStop(1.0,new Cairo.Color (r,g,b,0.1));
context.LineWidth = (double)size/5.0;
context.Arc (size/2.0, size/2.0,
size/2.0-context.LineWidth/2.0,0,2*Math.PI);
context.Save();
context.Pattern = pattern;
context.Fill();
if (arc != 0) {
context.LineWidth = (double)size/10.0;
context.Arc (size/2.0, size/2.0,
size/2.0-context.LineWidth/2.0,-Math.PI/2.0,2*Math.PI*arc/100.0-Math.PI/2.0);
Hyena.Log.Debug ("Arc prototype "+ arc);
context.Color = new Cairo.Color (a_r,a_g,a_b,0.5);
context.Stroke ();
}
((IDisposable) context.Target).Dispose ();
((IDisposable) context).Dispose ();
}
public void DrawSpinner (CairoTexture tex, int count)
{
Cairo.Context cr = tex.Create ();
cr.Translate (height /2, height /2);
cr.LineWidth = 3;
for (int i = 0; i < 8; i ++) {
cr.Color = new Cairo.Color (1,1,1,1-(double)((count+i)%8)/7);
cr.MoveTo (0, -height/2.5+3);
cr.LineTo (0, -height/2.5);
cr.Rotate (-Math.PI / 4);
cr.Stroke ();
}
((IDisposable) cr.Target).Dispose ();
((IDisposable) cr).Dispose ();
}
