void RotatedTextExposeEvent (object sender, ExposeEventArgs a)
{
DrawingArea drawingArea = sender as DrawingArea;
int width = drawingArea.Allocation.Width;
int height = drawingArea.Allocation.Height;
double deviceRadius;
// Get the default renderer for the screen, and set it up for drawing
Gdk.PangoRenderer renderer = Gdk.PangoRenderer.GetDefault (drawingArea.Screen);
renderer.Drawable = drawingArea.GdkWindow;
renderer.Gc = drawingArea.Style.BlackGC;
// Set up a transformation matrix so that the user space coordinates for
// the centered square where we draw are [-RADIUS, RADIUS], [-RADIUS, RADIUS]
// We first center, then change the scale
deviceRadius = Math.Min (width, height) / 2;
Matrix matrix = Pango.Matrix.Identity;
matrix.Translate (deviceRadius + (width - 2 * deviceRadius) / 2, deviceRadius + (height - 2 * deviceRadius) / 2);
matrix.Scale (deviceRadius / RADIUS, deviceRadius / RADIUS);
// Create a PangoLayout, set the font and text
Context context = drawingArea.CreatePangoContext ();
Pango.Layout layout = new Pango.Layout (context);
layout.SetText ("Text");
FontDescription desc = FontDescription.FromString ("Sans Bold 27");
layout.FontDescription = desc;
// Draw the layout N_WORDS times in a circle
for (int i = 0; i < N_WORDS; i++)
{
Gdk.Color color = new Gdk.Color ();
Matrix rotatedMatrix = matrix;
int w, h;
double angle = (360 * i) / N_WORDS;
// Gradient from red at angle == 60 to blue at angle == 300
color.Red = (ushort) (65535 * (1 + Math.Cos ((angle - 60) * Math.PI / 180)) / 2);
color.Green = 0;
color.Blue = (ushort) (65535 - color.Red);
renderer.SetOverrideColor (RenderPart.Foreground, color);
rotatedMatrix.Rotate (angle);
context.Matrix = rotatedMatrix;
// Inform Pango to re-layout the text with the new transformation matrix
layout.ContextChanged ();
layout.GetSize (out w, out h);
renderer.DrawLayout (layout, - w / 2, (int) (- RADIUS * Pango.Scale.PangoScale));
}
// Clean up default renderer, since it is shared
renderer.SetOverrideColor (RenderPart.Foreground, Gdk.Color.Zero);
renderer.Drawable = null;
renderer.Gc = null;
}
/// <summary>Dibuja un texto en la superficie de dibujo.</summary>
/// <param name="c">El color del texto.</param>
/// <param name="x">La posición x del texto.</param>
/// <param name="y">La posición y del texto.</param>
/// <param name="texto">El texto a dibujar en la superficie de dibujo.
/// </param>
/// <param name="cent">Indica si el texto está centrado (x e y se
/// refieren al centro del texto) o no (x e y se refieren a la
/// esquina superior del texto)</param>
public void DibujarTexto
(EnuColor c, int x, int y, String texto, bool cent)
{
int anc;
int alt;
lock (this)
{
if (pixmap != null)
{
if (texto != null)
{
layout.SetText(texto);
}
else
{
layout.SetText(" ");
}
x = CoordX(x);
y = CoordY(y);
if (cent)
{
try
{
layout.GetSize(out anc, out alt);
}
catch (System.NullReferenceException)
{
this.layout = new Pango.Layout(this.PangoContext);
return;
}
x = x - (anc / 2200);
y = y - (alt / 2200);
}
pixmap.DrawLayout(GetGC(c), x, y, layout);
}
}
}
void HandleM_printDrawPage(object o, DrawPageArgs args)
{
// Create a Print Context from the Print Operation
PrintContext context = args.Context;
// Create a Cairo Context from the Print Context
Cairo.Context cr = context.CairoContext;
// Get the width of the Print Context
double width = context.Width;
// Create a rectangle to be used for the Content
cr.Rectangle(0, 0, width, headerHeight);
cr.SetSourceRGB(0.95, 0.95, 0.95);
cr.FillPreserve();
// Create a Stroke to outline the Content
cr.SetSourceRGB(0, 0, 0);
cr.LineWidth = 1;
cr.Stroke();
// Create a Pango Layout for the Text
Pango.Layout layout = context.CreatePangoLayout();
// Get the Text Height fromt the Height of the layout and the Height of the Page
int layoutWidth, layoutHeight;
layout.GetSize(out layoutWidth, out layoutHeight);
double textHeight = (double)layoutHeight / (double)pangoScale;
cr.MoveTo(5, (headerHeight - textHeight) / 2);
// Set the Font and Font Size desired
Pango.FontDescription desc = Pango.FontDescription.FromString("sans 12");
layout.FontDescription = desc;
// Create a Header with the FileName and center it on the page
layout.SetText(m_cache.Name + " : " + m_cache.CacheName);
//layout.Width = (int) width *3;
layout.Alignment = Pango.Alignment.Left;
Pango.CairoHelper.ShowLayout(cr, layout);
// cr.MoveTo (width/2, (headerHeight - textHeight) / 2);
// Set the Page Number in the Footer with a right alignment
string pageStr = String.Format(Catalog.GetString("Page {0} of {1}"), args.PageNr + 1, m_numPages);
layout.SetText(pageStr);
layout.Alignment = Pango.Alignment.Right;
cr.MoveTo(width - 75, (headerHeight - textHeight) / 2);
Pango.CairoHelper.ShowLayout(cr, layout);
// Create a new Pango Layout for the Content
layout = null;
layout = context.CreatePangoLayout();
// Set the Description of the Content
desc = Pango.FontDescription.FromString("sans");
desc.Size = (int)(m_fontSize * pangoScale);
layout.FontDescription = desc;
// Move to the beginning of the Content, which is after the Header Height and Gap
cr.MoveTo(0, headerHeight + headerGap);
int line = args.PageNr * m_linesPerPage;
// Draw the lines on the page according to how many lines there are left and how many lines can fit on the page
for (int i = 0; i < m_linesPerPage && line < m_numLines; i++)
{
layout.SetMarkup(m_Lines[line].TrimStart());
Pango.CairoHelper.ShowLayout(cr, layout);
cr.RelMoveTo(0, m_fontSize + 0.5);
line++;
}
layout = null;
context.Dispose();
}
void RotatedTextExposeEvent(object sender, ExposeEventArgs a)
{
DrawingArea drawingArea = sender as DrawingArea;
int width = drawingArea.Allocation.Width;
int height = drawingArea.Allocation.Height;
double deviceRadius;
// Get the default renderer for the screen, and set it up for drawing
Gdk.PangoRenderer renderer = Gdk.PangoRenderer.GetDefault(drawingArea.Screen);
renderer.Drawable = drawingArea.GdkWindow;
renderer.Gc = drawingArea.Style.BlackGC;
// Set up a transformation matrix so that the user space coordinates for
// the centered square where we draw are [-RADIUS, RADIUS], [-RADIUS, RADIUS]
// We first center, then change the scale
deviceRadius = Math.Min(width, height) / 2;
Matrix matrix = Pango.Matrix.Identity;
matrix.Translate(deviceRadius + (width - 2 * deviceRadius) / 2, deviceRadius + (height - 2 * deviceRadius) / 2);
matrix.Scale(deviceRadius / RADIUS, deviceRadius / RADIUS);
// Create a PangoLayout, set the font and text
Context context = drawingArea.CreatePangoContext();
Pango.Layout layout = new Pango.Layout(context);
layout.SetText("Text");
FontDescription desc = FontDescription.FromString("Sans Bold 27");
layout.FontDescription = desc;
// Draw the layout N_WORDS times in a circle
for (int i = 0; i < N_WORDS; i++)
{
Gdk.Color color = new Gdk.Color();
Matrix rotatedMatrix = matrix;
int w, h;
double angle = (360 * i) / N_WORDS;
// Gradient from red at angle == 60 to blue at angle == 300
color.Red = (ushort)(65535 * (1 + Math.Cos((angle - 60) * Math.PI / 180)) / 2);
color.Green = 0;
color.Blue = (ushort)(65535 - color.Red);
renderer.SetOverrideColor(RenderPart.Foreground, color);
rotatedMatrix.Rotate(angle);
context.Matrix = rotatedMatrix;
// Inform Pango to re-layout the text with the new transformation matrix
layout.ContextChanged();
layout.GetSize(out w, out h);
renderer.DrawLayout(layout, -w / 2, (int)(-RADIUS * Pango.Scale.PangoScale));
}
// Clean up default renderer, since it is shared
renderer.SetOverrideColor(RenderPart.Foreground, Gdk.Color.Zero);
renderer.Drawable = null;
renderer.Gc = null;
}
public override void Layout(Cairo.Context cr)
{
layout = Pango.CairoHelper.CreateLayout(cr);
Pango.FontDescription desc = Pango.FontDescription.FromString("sans 7");
layout.FontDescription = desc;
layout.SetMarkup(Text);
layout.Width = (int)(Pango.Scale.PangoScale*(Width - 2*BorderWidth));
layout.Alignment = Pango.Alignment.Center;
int layoutWidth, layoutHeight;
layout.GetSize (out layoutWidth, out layoutHeight);
double textHeight = (double)layoutHeight / Pango.Scale.PangoScale;
double textWidth = (double)layoutWidth / Pango.Scale.PangoScale;
if(textWidth < Width)
{
textWidth = Width;
}
X0 = XCenter - textWidth/2.0 - BorderWidth;
X1 = XCenter + textWidth/2.0 + BorderWidth;
Y0 = YTop;
Y1 = YTop + textHeight + 2.0*BorderWidth;
}
