C++ pango_layout_set_text函数代码示例

gboolean
text_to_path (const Text *text, GArray *points)
{
  cairo_t *cr;
  cairo_surface_t *surface;
  PangoLayout *layout;
  PangoRectangle ink_rect;
  char *str;
  gboolean ret = FALSE;

  if (!PANGO_IS_CAIRO_FONT_MAP (pango_context_get_font_map (dia_font_get_context())))
    return FALSE;

  layout = pango_layout_new(dia_font_get_context());
  pango_layout_set_font_description (layout, dia_font_get_description (text->font));
  pango_layout_set_indent (layout, 0);
  pango_layout_set_justify (layout, FALSE);
  pango_layout_set_alignment (layout, 
			      text->alignment == ALIGN_LEFT ? PANGO_ALIGN_LEFT :
			      text->alignment == ALIGN_RIGHT ? PANGO_ALIGN_RIGHT : PANGO_ALIGN_CENTER);

  str = text_get_string_copy (text);
  pango_layout_set_text (layout, str, -1);
  g_free (str);

  pango_layout_get_extents (layout, &ink_rect, NULL);
  /* any surface should do - this one is always available */
  surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
					ink_rect.width / PANGO_SCALE, ink_rect.height / PANGO_SCALE);
  cr = cairo_create (surface);
  cairo_surface_destroy (surface);

  pango_cairo_layout_path (cr, layout);

  /* convert the path */
  if (cairo_status (cr) == CAIRO_STATUS_SUCCESS)
  {
    cairo_path_t *path;
    int i;

    path = cairo_copy_path (cr);

    for (i=0; i < path->num_data; i += path->data[i].header.length) {
      cairo_path_data_t *data = &path->data[i];
      BezPoint bp;

      switch (data->header.type) {
      case CAIRO_PATH_MOVE_TO :
	bp.type = BEZ_MOVE_TO;
	bp.p1.x = data[1].point.x; bp.p1.y = data[1].point.y;
	break;
      case CAIRO_PATH_LINE_TO :
        bp.type = BEZ_LINE_TO;
	bp.p1.x = data[1].point.x; bp.p1.y = data[1].point.y;
	break;
      case CAIRO_PATH_CURVE_TO :
        bp.type = BEZ_CURVE_TO;
	bp.p1.x = data[1].point.x; bp.p1.y = data[1].point.y;
	bp.p2.x = data[2].point.x; bp.p2.y = data[2].point.y;
	bp.p3.x = data[3].point.x; bp.p3.y = data[3].point.y;
	break;
      case CAIRO_PATH_CLOSE_PATH :
        /* can't do anything */
      default :
        continue;
      }
      g_array_append_val (points, bp);
    }
    ret = (path->status == CAIRO_STATUS_SUCCESS);
    cairo_path_destroy (path);
  }
  /* finally scale it ? */

  /* clean up */
  g_object_unref (layout);
  cairo_destroy (cr);

  return ret;
}

static void
create_pages (Pqueue * queue)
{
	gchar * msg;
	gdouble line_height;
	guint i, id;
	glong index;
	PangoLayoutLine * line;
	PangoRectangle ink_rect, logical_rect;

	g_return_if_fail (queue);
	g_return_if_fail (queue->pos < strlen(queue->text));
	while (queue->pos < strlen (queue->text))
	{
		while (gtk_events_pending ())
			gtk_main_iteration ();
		for (i = 0; i < queue->lines_per_page; i++)
		{
			line = pango_layout_iter_get_line (queue->iter);
			pango_layout_iter_next_line (queue->iter);
			pango_layout_iter_get_line_extents (queue->iter, &ink_rect, &logical_rect);
			index = pango_layout_iter_get_index (queue->iter);
			if (index == 0)
			{
				i = queue->lines_per_page;
				queue->pos = strlen (queue->text);
				g_message ("%s", _("Error: Pango iter index is zero."));
				continue;
			}
			line_height = logical_rect.height / PANGO_SCALE;
			if ((queue->page_height + line_height) > (queue->height - (EDGE_MARGIN/2)))
			{
				queue->pos += index;
				queue->page_height = EDGE_MARGIN;
				gtk_progress_bar_pulse (queue->progressbar);
				pango_cairo_update_layout (queue->cr, queue->layout);
				queue->layout = make_new_page (queue->context, queue->desc, queue->height, queue->width);
				i = queue->lines_per_page;
				queue->page_count++;
				pango_layout_set_text (queue->layout, (queue->text+queue->pos), -1);
				queue->iter = pango_layout_get_iter (queue->layout);
				pango_cairo_show_layout_line (queue->cr, line);
				pango_cairo_update_layout (queue->cr, queue->layout);
				cairo_show_page (queue->cr);
			}
			else
				pango_cairo_show_layout_line (queue->cr, line);
			queue->page_height += line_height;
			cairo_move_to (queue->cr, SIDE_MARGIN / 2, queue->page_height);
		}
	}
	pango_layout_iter_free (queue->iter);
	gtk_progress_bar_set_fraction (queue->progressbar, 0.0);
	cairo_surface_destroy(queue->surface);
	pango_font_description_free (queue->desc);
	g_object_unref (queue->context);
	g_object_unref (queue->layout);
	cairo_destroy (queue->cr);
	id = gtk_statusbar_get_context_id (queue->statusbar, PACKAGE);
	msg = g_strdup_printf (ngettext("Saved PDF file. (%ld page)",
		"Saved PDF file (%ld pages).", queue->page_count), queue->page_count);
	gtk_statusbar_push (queue->statusbar, id, msg);
	g_free (msg);
}

gboolean
text_get_extents (const gchar *fontname,
                  const gchar *text,
                  gint        *width,
                  gint        *height,
                  gint        *ascent,
                  gint        *descent)
{
  PangoFontDescription *font_desc;
  PangoContext         *context;
  PangoLayout          *layout;
  PangoFontMap         *fontmap;
  PangoRectangle        rect;

  g_return_val_if_fail (fontname != NULL, FALSE);
  g_return_val_if_fail (text != NULL, FALSE);

  fontmap = pango_cairo_font_map_new_for_font_type (CAIRO_FONT_TYPE_FT);
  if (! fontmap)
    g_error ("You are using a Pango that has been built against a cairo "
             "that lacks the Freetype font backend");

  pango_cairo_font_map_set_resolution (PANGO_CAIRO_FONT_MAP (fontmap),
                                       72.0); /* FIXME: resolution */
  context = pango_font_map_create_context (fontmap);
  g_object_unref (fontmap);

  layout = pango_layout_new (context);
  g_object_unref (context);

  font_desc = pango_font_description_from_string (fontname);
  pango_layout_set_font_description (layout, font_desc);
  pango_font_description_free (font_desc);

  pango_layout_set_text (layout, text, -1);

  pango_layout_get_pixel_extents (layout, NULL, &rect);

  if (width)
    *width = rect.width;
  if (height)
    *height = rect.height;

  if (ascent || descent)
    {
      PangoLayoutIter *iter;
      PangoLayoutLine *line;

      iter = pango_layout_get_iter (layout);
      line = pango_layout_iter_get_line_readonly (iter);
      pango_layout_iter_free (iter);

      pango_layout_line_get_pixel_extents (line, NULL, &rect);

      if (ascent)
        *ascent = PANGO_ASCENT (rect);
      if (descent)
        *descent = - PANGO_DESCENT (rect);
    }

  g_object_unref (layout);

  return TRUE;
}

unsigned Gosu::pango::textWidth(const std::wstring& text,
    const std::wstring& fontFace, unsigned fontHeight,
    unsigned fontFlags)
{
    g_type_init();

    int dpi_x = 100, dpi_y = 100;

    context = pango_ft2_get_context(dpi_x, dpi_y);

    pango_context_set_language(context, pango_language_from_string ("en_US"));
    PangoDirection init_dir = PANGO_DIRECTION_LTR;
    pango_context_set_base_dir(context, init_dir);

//    static PangoFontDescription *font_description;
    font_description = pango_font_description_new();

    pango_font_description_set_family(font_description,
        g_strdup(narrow(fontFace).c_str()));
    pango_font_description_set_style(font_description,
        (fontFlags & ffItalic) ? PANGO_STYLE_ITALIC : PANGO_STYLE_NORMAL);
    pango_font_description_set_variant(font_description, PANGO_VARIANT_NORMAL);
    pango_font_description_set_weight(font_description,
        (fontFlags & ffBold) ? PANGO_WEIGHT_BOLD : PANGO_WEIGHT_NORMAL);
    pango_font_description_set_stretch(font_description, PANGO_STRETCH_NORMAL);
    int init_scale = int(fontHeight/2.0 + 0.5);
    pango_font_description_set_size(font_description, init_scale * PANGO_SCALE);

    pango_context_set_font_description(context, font_description);


    layout = pango_layout_new(context);


    if(fontFlags & ffUnderline)
    {
//        PangoAttribute *attr;
        attr = pango_attr_underline_new(PANGO_UNDERLINE_SINGLE);
        attr->start_index = 0;
        attr->end_index = text.length();
//        PangoAttrList* attrList;
        attrList = pango_attr_list_new();
        pango_attr_list_insert(attrList, attr);
        pango_layout_set_attributes(layout, attrList);
        pango_attr_list_unref(attrList);
    }


    // IMPR: Catch errors? (Last NULL-Pointer)
    gchar* utf8Str = g_ucs4_to_utf8((gunichar*)text.c_str(), text.length(), NULL, NULL, NULL);
    pango_layout_set_text(layout, utf8Str, -1);
    g_free(utf8Str);

    PangoDirection base_dir = pango_context_get_base_dir(context);
    pango_layout_set_alignment(layout,
        base_dir == PANGO_DIRECTION_LTR ? PANGO_ALIGN_LEFT : PANGO_ALIGN_RIGHT);

    pango_layout_set_width(layout, -1);

    PangoRectangle logical_rect;

    pango_layout_get_pixel_extents(layout, NULL, &logical_rect);
    height = logical_rect.height;
    width = logical_rect.width;

    return width;
}

static gboolean draw_callback(GtkWidget *widget,cairo_t *cr,gpointer data)
{
	guint width=gtk_widget_get_allocated_width(widget);
	guint height=gtk_widget_get_allocated_height(widget);
	double sw,sh,spacing;
	//PangoLayout* pn=gtk_widget_create_pango_layout(widget,"HELLO? IS THIS WORKING?(\u2126)");
	PangoContext* pc=gtk_widget_get_pango_context(widget);
	PangoLayout* pn=pango_layout_new(pc);
	sw=((double)width-2*gutter)/grid.width;
	sh=((double)height-2*gutter)/grid.height;
	spacing=MIN(sw,sh);
	cairo_set_source_rgb(cr,0,0,255);
//	cairo_arc(cr,mouseX,mouseY,5,0,2*G_PI);
	cairo_translate(cr,(double)width/2,(double)height/2);
	cairo_translate(cr,-(double)grid.width/2.0*spacing,-(double)grid.height/2.0*spacing);
	int i,j;
	cairo_set_source_rgb(cr,0,0,0);
	for(i=0;i<grid.map.ccount;i++)
	{
		Component* c=grid.map.components+i;
		int A=c->A;
		int B=c->B;
		draw_component(cr,pc,spacing,spacing*(A%(grid.width+1)),spacing*(A/(grid.width+1)),spacing*(B%(grid.width+1)),spacing*(B/(grid.width+1)),c);
	}
	cairo_set_source_rgb(cr,0,0,0);
	char buffer[20];
	for(i=0;i<=grid.width;i++)
	{
		for(j=0;j<=grid.height;j++)
		{
			if(draw_flags&VOLTAGES){
				sprintf(buffer,"%.2fV",grid.map.vertices[i+j*(grid.width+1)].voltage);
				pango_layout_set_text(pn,buffer,-1);
				int w,h;
				pango_layout_get_pixel_size(pn,&w,&h);
				cairo_arc(cr,i*spacing,j*spacing,25,0,2*G_PI);
				cairo_set_source_rgb(cr,1.0,1.0,1.0);
				cairo_fill_preserve(cr);
				cairo_set_source_rgb(cr,0.0,0.0,0.0);
				cairo_stroke(cr);
				cairo_move_to(cr,i*spacing-w/2,j*spacing-h/2);
				pango_cairo_update_layout(cr,pn);
				pango_cairo_show_layout(cr,pn);
				cairo_new_path(cr);
/*				sprintf(buffer,"%gV",grid.map.vertices[i+j*(grid.width+1)].voltage);
				pango_layout_set_text(pn,buffer,-1);
				int w,h;
				pango_layout_get_pixel_size(pn,&w,&h);
				cairo_arc(cr,i*spacing,j*spacing,w/2,0,2*G_PI);
				cairo_set_source_rgb(cr,1.0,1.0,1.0);
				cairo_fill_preserve(cr);
				cairo_set_source_rgb(cr,0.0,0.0,0.0);
				cairo_stroke(cr);
				cairo_move_to(cr,i*spacing-w/2,j*spacing-h/2);
				pango_cairo_update_layout(cr,pn);
				pango_cairo_show_layout(cr,pn);
				cairo_new_path(cr);*/
			}else{
				cairo_arc(cr,i*spacing,j*spacing,2,0,2*G_PI);
				cairo_set_source_rgb(cr,1.0,1.0,1.0);
				cairo_fill_preserve(cr);
				cairo_set_source_rgb(cr,0.0,0.0,0.0);
				cairo_stroke(cr);
			}
		}
	}
	//pango_cairo_show_layout(cr,pn);
return FALSE;
}

void draw_component(cairo_t *cr,PangoContext* pc,double unit,double x1,double y1,double x2,double y2,Component* com)
{
	PangoLayout* pn=pango_layout_new(pc);
	char buffer[20];
	double ang=atan2(y2-y1,x2-x1);
	if((ang>90&&ang<270)){
		ang-=180;
	}
	int w=0;
	int h=0;
	if(draw_flags&CURRENTS){
		sprintf(buffer,"%.3gA",com->current);
		cairo_move_to(cr,(x1+x2)/2,(y1+y2)/2);
		pango_layout_set_text(pn,buffer,-1);
		cairo_save(cr);
		cairo_translate(cr,(x1+x2)/2,(y1+y2)/2);
		pango_layout_get_pixel_size(pn,&w,&h);
		cairo_rotate(cr,ang);
		cairo_move_to(cr,-w/2,10);
		pango_cairo_update_layout(cr,pn);
		pango_cairo_show_layout(cr,pn);
	
		cairo_restore(cr);
	}
	if(com->type==WIRE)
	{
		cairo_move_to(cr,x1,y1);
		cairo_line_to(cr,x2,y2);
		cairo_stroke(cr);
		return;
	}
	if(com->type==RESISTOR)
	{
		//char buffer[20];
		//sprintf(buffer,"%g\u2126 %gA",*(double*)com->data,com->current);
		cairo_move_to(cr,x1,y1);
		cairo_save(cr);
		cairo_translate(cr,(x1+x2)/2,(y1+y2)/2);
		/*cairo_move_to(cr,unit*.2,unit*.2);
		PangoLayout* pn=pango_layout_new(pc);
		pango_layout_set_text(pn,buffer,-1);
		pango_cairo_update_layout(cr,pn);
		pango_cairo_show_layout(cr,pn);*/
		cairo_scale(cr,unit,unit);
		cairo_rotate(cr,atan2(y2-y1,x2-x1));
		cairo_line_to(cr,-.25,0);
		cairo_line_to(cr,-.1875,.125);
		cairo_line_to(cr,-.0625,-.125);
		cairo_line_to(cr,.0625,.125);
		cairo_line_to(cr,.1875,-.125);
		cairo_line_to(cr,.25,0);
		cairo_restore(cr);
		cairo_line_to(cr,x2,y2);
		cairo_stroke(cr);

		cairo_save(cr);
		cairo_translate(cr,(x1+x2)/2,(y1+y2)/2);
		cairo_rotate(cr,ang);
		sprintf(buffer,"%g\u2126",*(double*)com->data);
		pango_layout_set_text(pn,buffer,-1);
		pango_layout_get_pixel_size(pn,&w,&h);
		cairo_move_to(cr,-w/2,-h-10);
		pango_cairo_update_layout(cr,pn);
		pango_cairo_show_layout(cr,pn);
		cairo_restore(cr);
		cairo_new_path(cr);
		return;
	}
	if(com->type==BATTERY)
	{
		if(*(double*)com->data==0){
			cairo_save(cr);
			
			const double dash[]={10};
			cairo_set_dash(cr,dash,1,0);
			cairo_move_to(cr,x1,y1);
			cairo_line_to(cr,x2,y2);
			cairo_stroke(cr);
			cairo_restore(cr);
		}else{
			if(*(double*)com->data<0){
				double tmp=x1;
				x1=x2;
				x2=tmp;
				tmp=y1;
				y1=y2;
				y2=tmp;
			}
			cairo_move_to(cr,x1,y1);
			cairo_save(cr);
			cairo_translate(cr,(x1+x2)/2,(y1+y2)/2);
			cairo_scale(cr,unit,unit);
			cairo_rotate(cr,atan2(y2-y1,x2-x1));
			cairo_line_to(cr,-.05,0);
			cairo_move_to(cr,-.05,.25);
			cairo_line_to(cr,-.05,-.25);
			cairo_move_to(cr,.05,.15);
			cairo_line_to(cr,.05,-.15);
			cairo_move_to(cr,-.15,-.25);
			cairo_line_to(cr,-.25,-.25);
//.........这里部分代码省略.........

bool wxFont::GTKSetPangoAttrs(PangoLayout* layout) const
{
    if (!IsOk() || !(GetUnderlined() || GetStrikethrough()))
        return false;

    PangoAttrList* attrs = pango_attr_list_new();
    PangoAttribute* a;

#ifndef __WXGTK3__
    if (wx_pango_version_check(1,16,0))
    {
        // a PangoLayout which has leading/trailing spaces with underlined font
        // is not correctly drawn by this pango version: Pango won't underline the spaces.
        // This can be a problem; e.g. wxHTML rendering of underlined text relies on
        // this behaviour. To workaround this problem, we use a special hack here
        // suggested by pango maintainer Behdad Esfahbod: we prepend and append two
        // empty space characters and give them a dummy colour attribute.
        // This will force Pango to underline the leading/trailing spaces, too.

        const char* text = pango_layout_get_text(layout);
        const size_t n = strlen(text);
        if ((n > 0 && text[0] == ' ') || (n > 1 && text[n - 1] == ' '))
        {
            wxCharBuffer buf(n + 6);
            // copy the leading U+200C ZERO WIDTH NON-JOINER encoded in UTF8 format
            memcpy(buf.data(), "\342\200\214", 3);
            // copy the user string
            memcpy(buf.data() + 3, text, n);
            // copy the trailing U+200C ZERO WIDTH NON-JOINER encoded in UTF8 format
            memcpy(buf.data() + 3 + n, "\342\200\214", 3);

            pango_layout_set_text(layout, buf, n + 6);

            // Add dummy attributes (use colour as it's invisible anyhow for 0
            // width spaces) to ensure that the spaces in the beginning/end of the
            // string are underlined too.
            a = pango_attr_foreground_new(0x0057, 0x52A9, 0xD614);
            a->start_index = 0;
            a->end_index = 3;
            pango_attr_list_insert(attrs, a);

            a = pango_attr_foreground_new(0x0057, 0x52A9, 0xD614);
            a->start_index = n + 3;
            a->end_index = n + 6;
            pango_attr_list_insert(attrs, a);
        }
    }
#endif // !__WXGTK3__

    if (GetUnderlined())
    {
        a = pango_attr_underline_new(PANGO_UNDERLINE_SINGLE);
        pango_attr_list_insert(attrs, a);
    }
    if (GetStrikethrough())
    {
        a = pango_attr_strikethrough_new(true);
        pango_attr_list_insert(attrs, a);
    }

    pango_layout_set_attributes(layout, attrs);
    pango_attr_list_unref(attrs);

    return true;
}

void render_text(GdkDrawable *da, GdkGC *gc, int x, int y, double angle,
    const char *s, const char *font, double xalign, double yalign,
    int xmax, int ymax)
{
	GdkScreen *screen;
	PangoRenderer *renderer;
	PangoContext *context;
	PangoLayout *layout;
	PangoFontDescription *desc;
	int width, height;
	PangoMatrix m = PANGO_MATRIX_INIT;
	double f_min, f;

	/* set up the renderer */

	screen = gdk_drawable_get_screen(da);
	renderer = gdk_pango_renderer_get_default(screen);
	gdk_pango_renderer_set_drawable(GDK_PANGO_RENDERER(renderer), da);
	gdk_pango_renderer_set_gc(GDK_PANGO_RENDERER(renderer), gc);

	/* start preparing the layout */

	context = gdk_pango_context_get_for_screen(screen);
	layout = pango_layout_new(context);
	pango_layout_set_text(layout, s, -1);

	/* apply the font */

	desc = pango_font_description_from_string(font);
	pango_layout_set_font_description(layout, desc);
	pango_font_description_free(desc);

	/* align and position the text */

	pango_layout_get_size(layout, &width, &height);
	f_min = 1.0;
	if (xmax) {
		f = xmax/((double) width/PANGO_SCALE);
		if (f < f_min)
			f_min = f;
	}
	if (ymax) {
		f = ymax/((double) height/PANGO_SCALE);
		if (f < f_min)
			f_min = f;
	}
	if (f_min < MIN_FONT_SCALE)
		f_min = MIN_FONT_SCALE;
	pango_matrix_translate(&m, x, y);
	pango_matrix_rotate(&m, angle);
	pango_matrix_translate(&m,
	    -xalign*f_min*width/PANGO_SCALE,
	    (yalign-1)*f_min*height/PANGO_SCALE);
	pango_matrix_scale(&m, f_min, f_min);

	pango_context_set_matrix(context, &m);
	pango_layout_context_changed(layout);
	pango_renderer_draw_layout(renderer, layout, 0, 0);

	/* clean up renderer */

	gdk_pango_renderer_set_drawable(GDK_PANGO_RENDERER(renderer), NULL);
	gdk_pango_renderer_set_gc(GDK_PANGO_RENDERER(renderer), NULL);

	/* free objects */

	g_object_unref(layout);
	g_object_unref(context);
}

//.........这里部分代码省略.........
            break;

    if (scale == G_N_ELEMENTS (ruler_metric.ruler_scale))
        scale = G_N_ELEMENTS (ruler_metric.ruler_scale) - 1;

    unit = gtk_shruler_get_unit (ruler);

    /* drawing starts here */
    length = 0;
    for (i = G_N_ELEMENTS (ruler_metric.subdivide) - 1; i >= 0; i--)
    {
        gdouble subd_incr;

        /* hack to get proper subdivisions at full pixels */
        if (unit == CM_UNIT_PIXEL && scale == 1 && i == 1)
            subd_incr = 1.0;
        else
            subd_incr = ((gdouble) ruler_metric.ruler_scale[scale] /
                         (gdouble) ruler_metric.subdivide[i]);

        if (subd_incr * fabs (increment) <= MINIMUM_INCR)
            continue;

        /* don't subdivide pixels */
        if (unit == CM_UNIT_PIXEL && subd_incr < 1.0)
            continue;

        if (lower < upper)
        {
            start = floor (lower / subd_incr) * subd_incr;
            end   = ceil  (upper / subd_incr) * subd_incr;
        }
        else
        {
            start = floor (upper / subd_incr) * subd_incr;
            end   = ceil  (lower / subd_incr) * subd_incr;
        }

        for (cur = start; cur <= end; cur += subd_incr)
        {
            if (((int)cur) % 10 == 0)
                length = height * 2 / 3;
            else if (((int)cur) % 5 == 0)
                length = height / 3;
            else
                length = height / 4;

            pos = ROUND ((cur - lower) * increment);

            if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
            {
                cairo_rectangle (cr,
                                 pos, height + ythickness - length,
                                 1,   length);
            }
            else
            {
                cairo_rectangle (cr,
                                 height + xthickness - length, pos,
                                 length,                       1);
            }

            /* draw label */
            if (i == 0 && ((int)cur) % 10 == 0)
            {
                g_snprintf (unit_str, sizeof (unit_str), "%d", (int) cur);

                if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
                {
                    pango_layout_set_text (layout, unit_str, -1);
                    pango_layout_get_extents (layout, &logical_rect, NULL);

                    cairo_move_to (cr,
                                   pos + 2,
                                   ythickness + PANGO_PIXELS (logical_rect.y - digit_offset));
                    pango_cairo_show_layout (cr, layout);
                }
                else
                {
                    gint j;

                    for (j = 0; j < (int) strlen (unit_str); j++)
                    {
                        pango_layout_set_text (layout, unit_str + j, 1);
                        pango_layout_get_extents (layout, NULL, &logical_rect);

                        cairo_move_to (cr,
                                       xthickness + 1,
                                       pos + digit_height * j + 2 + PANGO_PIXELS (logical_rect.y - digit_offset));
                        pango_cairo_show_layout (cr, layout);
                    }
                }
            }
        }
    }

    cairo_fill (cr);
out:
    cairo_destroy (cr);
}

//.........这里部分代码省略.........
    PangoLayout *pl;
    gchar s[128];

    vik_viewport_screen_to_coord ( vvp, 0, vvp->height, &left );
    vik_viewport_screen_to_coord ( vvp, vvp->width/SCSIZE, vvp->height, &right );

    vik_units_distance_t dist_units = a_vik_get_units_distance ();
    switch (dist_units) {
    case VIK_UNITS_DISTANCE_KILOMETRES:
      base = vik_coord_diff ( &left, &right ); // in meters
      break;
    case VIK_UNITS_DISTANCE_MILES:
      // in 0.1 miles (copes better when zoomed in as 1 mile can be too big)
      base = VIK_METERS_TO_MILES(vik_coord_diff ( &left, &right )) * 10.0;
      break;
    default:
      base = 1; // Keep the compiler happy
      g_critical("Houston, we've had a problem. distance=%d", dist_units);
    }
    ratio = (vvp->width/SCSIZE)/base;

    unit = 1;
    diff = fabs(base-unit);
    old_unit = unit;
    old_diff = diff;
    odd = 1;
    while (diff <= old_diff) {
      old_unit = unit;
      old_diff = diff;
      unit = unit * (odd%2 ? 5 : 2);
      diff = fabs(base-unit);
      odd++;
    }
    unit = old_unit;
    len = unit * ratio;

    /* white background */
    vik_viewport_draw_line(vvp, vvp->scale_bg_gc, 
			 PAD, vvp->height-PAD, PAD + len, vvp->height-PAD);
    vik_viewport_draw_line(vvp, vvp->scale_bg_gc,
			 PAD, vvp->height-PAD, PAD, vvp->height-PAD-HEIGHT);
    vik_viewport_draw_line(vvp, vvp->scale_bg_gc,
			 PAD + len, vvp->height-PAD, PAD + len, vvp->height-PAD-HEIGHT);
    /* black scale */
    vik_viewport_draw_line(vvp, gtk_widget_get_style(GTK_WIDGET(&vvp->drawing_area))->black_gc,
			 PAD, vvp->height-PAD, PAD + len, vvp->height-PAD);
    vik_viewport_draw_line(vvp, gtk_widget_get_style(GTK_WIDGET(&vvp->drawing_area))->black_gc,
			 PAD, vvp->height-PAD, PAD, vvp->height-PAD-HEIGHT);
    vik_viewport_draw_line(vvp, gtk_widget_get_style(GTK_WIDGET(&vvp->drawing_area))->black_gc,
			 PAD + len, vvp->height-PAD, PAD + len, vvp->height-PAD-HEIGHT);
    if (odd%2) {
      int i;
      for (i=1; i<5; i++) {
        vik_viewport_draw_line(vvp, vvp->scale_bg_gc, 
			     PAD+i*len/5, vvp->height-PAD, PAD+i*len/5, vvp->height-PAD-((i==5)?(2*HEIGHT/3):(HEIGHT/2)));
        vik_viewport_draw_line(vvp, gtk_widget_get_style(GTK_WIDGET(&vvp->drawing_area))->black_gc,
			     PAD+i*len/5, vvp->height-PAD, PAD+i*len/5, vvp->height-PAD-((i==5)?(2*HEIGHT/3):(HEIGHT/2)));
      }
    } else {
      int i;
      for (i=1; i<10; i++) {
        vik_viewport_draw_line(vvp, vvp->scale_bg_gc,
  			     PAD+i*len/10, vvp->height-PAD, PAD+i*len/10, vvp->height-PAD-((i==5)?(2*HEIGHT/3):(HEIGHT/2)));
        vik_viewport_draw_line(vvp, gtk_widget_get_style(GTK_WIDGET(&vvp->drawing_area))->black_gc,
  			     PAD+i*len/10, vvp->height-PAD, PAD+i*len/10, vvp->height-PAD-((i==5)?(2*HEIGHT/3):(HEIGHT/2)));
      }
    }
    pl = gtk_widget_create_pango_layout (GTK_WIDGET(&vvp->drawing_area), NULL); 
    pango_layout_set_font_description (pl, gtk_widget_get_style(GTK_WIDGET(&vvp->drawing_area))->font_desc);

    switch (dist_units) {
    case VIK_UNITS_DISTANCE_KILOMETRES:
      if (unit >= 1000) {
	sprintf(s, "%d km", (int)unit/1000);
      } else {
	sprintf(s, "%d m", (int)unit);
      }
      break;
    case VIK_UNITS_DISTANCE_MILES:
      // Handle units in 0.1 miles
      if (unit < 10.0) {
	sprintf(s, "%0.1f miles", unit/10.0);
      }
      else if ((int)unit == 10.0) {
	sprintf(s, "1 mile");
      }
      else {
	sprintf(s, "%d miles", (int)(unit/10.0));
      }
      break;
    default:
      g_critical("Houston, we've had a problem. distance=%d", dist_units);
    }
    pango_layout_set_text(pl, s, -1);
    vik_viewport_draw_layout(vvp, gtk_widget_get_style(GTK_WIDGET(&vvp->drawing_area))->black_gc,
			   PAD + len + PAD, vvp->height - PAD - 10, pl);
    g_object_unref(pl);
    pl = NULL;
  }
}

static void
_paint_lyrics (OlScrollWindow *scroll, cairo_t *cr)
{
  ol_assert (OL_IS_SCROLL_WINDOW (scroll));
  GtkWidget *widget = GTK_WIDGET (scroll);
  ol_assert (GTK_WIDGET_REALIZED (widget));
  OlScrollWindowPrivate *priv = OL_SCROLL_WINDOW_GET_PRIVATE (scroll);
  int line_height = ol_scroll_window_get_font_height (scroll) + priv->line_margin;
  int count = ol_scroll_window_compute_line_count (scroll);
  gint width, height;
  gdk_drawable_get_size (gtk_widget_get_window (GTK_WIDGET (scroll)),
                         &width, &height);
  
  /* set the font */
  PangoLayout *layout = _get_pango (scroll, cr);
  /* paint the lyrics*/
  cairo_save (cr);
  cairo_new_path (cr);
  cairo_rectangle (cr,
                   priv->padding_x, 0,
                   width - priv->padding_x * 2,
                   height - priv->padding_y * 2);
  cairo_close_path (cr);
  cairo_clip (cr);
  int i;
  gint current_lyric_id;
  gint lrc_y;
  _calc_paint_pos (scroll,
                   &current_lyric_id,
                   &lrc_y);
  int begin = current_lyric_id - count / 2;
  int end = current_lyric_id + count / 2 + 1;
  int ypos = height / 2  - lrc_y - (count / 2 + 1) * line_height;
  cairo_set_source_rgb(cr,
                       priv->inactive_color.r,
                       priv->inactive_color.g,
                       priv->inactive_color.b);
  if (scroll->whole_lyrics != NULL) {
    for (i = begin; i < end; i++) {
      ypos += line_height;
      if (i < 0) continue;
      if (i >= scroll->whole_lyrics->len)
        break;
      pango_layout_set_text (layout,
                             g_ptr_array_index (scroll->whole_lyrics, i),
                             -1);
      cairo_save (cr);
      double ratio = _get_active_color_ratio (scroll, i);
      double alpha = 1.0;
      if (ypos < line_height / 2.0 + priv->padding_y)
        alpha = 1.0 - (line_height / 2.0 + priv->padding_y - ypos) * 1.0 / line_height * 2;
      else if (ypos > height - line_height * 1.5 - priv->padding_y)
        alpha = (height - line_height - priv->padding_y - ypos) * 1.0 / line_height * 2;
      if (alpha < 0.0) alpha = 0.0;
      cairo_set_source_rgba (cr,
                             priv->active_color.r * ratio + 
                             priv->inactive_color.r * (1 - ratio),
                             priv->active_color.g * ratio +
                             priv->inactive_color.g * (1 - ratio),
                             priv->active_color.b * ratio +
                             priv->inactive_color.b * (1 - ratio),
                             alpha);
      cairo_move_to (cr, priv->padding_x, ypos);
      pango_cairo_update_layout (cr, layout);
      pango_cairo_show_layout (cr, layout);
      cairo_restore (cr);
    }
  }
  g_object_unref (layout);
  cairo_reset_clip (cr);
  cairo_restore (cr);
}

static void
gdl_dock_item_grip_size_allocate (GtkWidget     *widget,
                                  GtkAllocation *allocation)
{
    GdlDockItemGrip *grip;
    GtkContainer    *container;
    GtkRequisition   button_requisition = { 0, };
    GtkAllocation    child_allocation;

    g_return_if_fail (GDL_IS_DOCK_ITEM_GRIP (widget));
    g_return_if_fail (allocation != NULL);
  
    grip = GDL_DOCK_ITEM_GRIP (widget);
    container = GTK_CONTAINER (widget);

    GTK_WIDGET_CLASS (parent_class)->size_allocate (widget, allocation);

    if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL)
        child_allocation.x = allocation->x + container->border_width + ALIGN_BORDER;
    else
        child_allocation.x = allocation->x + allocation->width - container->border_width;
    child_allocation.y = allocation->y + container->border_width;

    gtk_widget_size_request (grip->_priv->close_button, &button_requisition);

    if (gtk_widget_get_direction (widget) != GTK_TEXT_DIR_RTL)
        child_allocation.x -= button_requisition.width;

    child_allocation.width = button_requisition.width;
    child_allocation.height = button_requisition.height;

    gtk_widget_size_allocate (grip->_priv->close_button, &child_allocation);

    if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL)
        child_allocation.x += button_requisition.width;
    

    gtk_widget_size_request (grip->_priv->iconify_button, &button_requisition);

    if (gtk_widget_get_direction (widget) != GTK_TEXT_DIR_RTL)
        child_allocation.x -= button_requisition.width;

    child_allocation.width = button_requisition.width;
    child_allocation.height = button_requisition.height;

    gtk_widget_size_allocate (grip->_priv->iconify_button, &child_allocation);

    if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL)
        child_allocation.x += button_requisition.width;

    
    if (grip->title_window) {
        GdkRectangle area;
        
        /* set layout text */
        ensure_title_and_icon_pixbuf (grip);
        pango_layout_set_text (grip->_priv->title_layout, grip->_priv->title, -1);

        gdl_dock_item_grip_get_title_area (grip, &area);

        gdk_window_move_resize (grip->title_window,
                                area.x, area.y, area.width, area.height);

        if (grip->_priv->icon_pixbuf)
            area.width -= gdk_pixbuf_get_width (grip->_priv->icon_pixbuf) + 1;
            
        /* ellipsize title if it doesn't fit the title area */
        ellipsize_layout (grip->_priv->title_layout, area.width);
    }
}

static gint
gimp_tag_popup_layout_tags (GimpTagPopup *popup,
                            gint          width)
{
    PangoFontMetrics *font_metrics;
    gint              x;
    gint              y;
    gint              height = 0;
    gint              i;
    gint              line_height;
    gint              space_width;

    x = GIMP_TAG_POPUP_MARGIN;
    y = GIMP_TAG_POPUP_MARGIN;

    font_metrics = pango_context_get_metrics (popup->context,
                   pango_context_get_font_description (popup->context),
                   NULL);

    line_height = PANGO_PIXELS ((pango_font_metrics_get_ascent (font_metrics) +
                                 pango_font_metrics_get_descent (font_metrics)));
    space_width = PANGO_PIXELS (pango_font_metrics_get_approximate_char_width (font_metrics));

    pango_font_metrics_unref (font_metrics);

    for (i = 0; i < popup->tag_count; i++)
    {
        PopupTagData *tag_data = &popup->tag_data[i];
        gint          w, h;

        pango_layout_set_text (popup->layout,
                               gimp_tag_get_name (tag_data->tag), -1);
        pango_layout_get_pixel_size (popup->layout, &w, &h);

        tag_data->bounds.width  = w + 2 * GIMP_TAG_POPUP_PADDING;
        tag_data->bounds.height = h + 2 * GIMP_TAG_POPUP_PADDING;

        if (x + space_width + tag_data->bounds.width +
                GIMP_TAG_POPUP_MARGIN - 1 > width)
        {
            x = GIMP_TAG_POPUP_MARGIN;
            y += line_height + 2 * GIMP_TAG_POPUP_PADDING + GIMP_TAG_POPUP_LINE_SPACING;
        }

        tag_data->bounds.x = x;
        tag_data->bounds.y = y;

        x += tag_data->bounds.width + space_width;
    }

    if (gtk_widget_get_direction (GTK_WIDGET (popup)) == GTK_TEXT_DIR_RTL)
    {
        for (i = 0; i < popup->tag_count; i++)
        {
            PopupTagData *tag_data = &popup->tag_data[i];

            tag_data->bounds.x = (width -
                                  tag_data->bounds.x -
                                  tag_data->bounds.width);
        }
    }

    height = y + line_height + GIMP_TAG_POPUP_MARGIN;

    return height;
}

//.........这里部分代码省略.........
	        g_free(tfont);
	    }
            *fontpath = buf;
        }
    }

#ifdef ENABLE_PANGO_MARKUP
    if ((span->font) && (flags = span->font->flags)) {
	unsigned char buf[BUFSIZ];
	agxbuf xb;

	agxbinit(&xb, BUFSIZ, buf);
	agxbput(&xb,"<span");

	if (flags & HTML_BF)
	    agxbput(&xb," weight=\"bold\"");
	if (flags & HTML_IF)
	    agxbput(&xb," style=\"italic\"");
	if (flags & HTML_UL)
	    agxbput(&xb," underline=\"single\"");
	if (flags & HTML_S)
	    agxbput(&xb," strikethrough=\"true\"");
	agxbput (&xb,">");

	if (flags & HTML_SUP)
	    agxbput(&xb,"<sup>");
	if (flags & HTML_SUB)
	    agxbput(&xb,"<sub>");

	agxbput (&xb,xml_string0(span->str, TRUE));

	if (flags & HTML_SUB)
	    agxbput(&xb,"</sub>");
	if (flags & HTML_SUP)
	    agxbput(&xb,"</sup>");

	agxbput (&xb,"</span>");
	if (!pango_parse_markup (agxbuse(&xb), -1, 0, &attrs, &text, NULL, &error)) {
	    fprintf (stderr, "Error - pango_parse_markup: %s\n", error->message);
	    text = span->str;
	    attrs = NULL;
	}
	agxbfree (&xb);
    }
    else {
	text = span->str;
	attrs = NULL;
    }
#else
    text = span->str;
#endif

    layout = pango_layout_new (context);
    span->layout = (void *)layout;    /* layout free with textspan - see labels.c */
    span->free_layout = pango_free_layout;    /* function for freeing pango layout */

    pango_layout_set_text (layout, text, -1);
    pango_layout_set_font_description (layout, desc);
#ifdef ENABLE_PANGO_MARKUP
    if (attrs)
	pango_layout_set_attributes (layout, attrs);
#endif

    pango_layout_get_extents (layout, NULL, &logical_rect);

    /* if pango doesn't like the font then it sets width=0 but height = garbage */
    if (logical_rect.width == 0)
	logical_rect.height = 0;

    textlayout_scale = POINTS_PER_INCH / (FONT_DPI * PANGO_SCALE);
    span->size.x = (int)(logical_rect.width * textlayout_scale + 1);    /* round up so that width/height are never too small */
    span->size.y = (int)(logical_rect.height * textlayout_scale + 1);

    /* FIXME  -- Horrible kluge !!! */

    /* For now we are using pango for single line blocks only.
     * The logical_rect.height seems to be too high from the font metrics on some platforms.
     * Use an assumed height based on the point size.
     */

    span->size.y = (int)(span->font->size * 1.1 + .5);

    /* The y offset from baseline to 0,0 of the bitmap representation */
#if !defined(WIN32) && defined PANGO_VERSION_MAJOR && (PANGO_VERSION_MAJOR >= 1)
    span->yoffset_layout = pango_layout_get_baseline (layout) * textlayout_scale;
#else
    {
	/* do it the hard way on rhel5/centos5 */
	PangoLayoutIter *iter = pango_layout_get_iter (layout);
	span->yoffset_layout = pango_layout_iter_get_baseline (iter) * textlayout_scale;
    }
#endif

    /* The distance below midline for y centering of text strings */
    span->yoffset_centerline = 0.2 * span->font->size;

    if (logical_rect.width == 0)
	return FALSE;
    return TRUE;
}

/* Redraw the vertical ruler */
static gboolean
histo_expose_vertical_ruler( GtkWidget *widget, GdkEventExpose *event, gpointer user_data )
{
  histoDrawing_t *drawing = (histoDrawing_t*)user_data;
  HistoControlFlowData *histo_cfv = drawing->histo_control_flow_data;
  gchar text[255];
  
  PangoContext *context;
  PangoLayout *layout;
  PangoFontDescription *FontDesc;
  PangoRectangle ink_rect;
  gint global_height=0;
  GdkColor foreground = { 0, 0, 0, 0 };
  GdkColor background = { 0, 0xffff, 0xffff, 0xffff };
  GdkColor red ={ 0, 0xFFFF, 0x1E00, 0x1000 };
  //GdkColor magneta ={ 0, 0x8900, 0x0000, 0x8400 };
  g_debug("vertical ruler expose event");
 
  gdk_draw_rectangle (drawing->vertical_ruler->window,
          drawing->vertical_ruler->style->white_gc,
          TRUE,
          event->area.x, event->area.y,
          event->area.width,
          event->area.height);

  gdk_draw_line (drawing->vertical_ruler->window,
                  drawing->ruler_gc_butt,
                  padding_width-1/*event->area.width-1*/,event->area.y,
                  padding_width-1/*event->area.width-1*/,event->area.y + event->area.height);

  snprintf(text, 255, "%.1f", (float)histo_cfv->max_height);

  layout = gtk_widget_create_pango_layout(drawing->drawing_area, NULL);

  context = pango_layout_get_context(layout);
  FontDesc = pango_context_get_font_description(context);

  pango_font_description_set_size(FontDesc, 6*PANGO_SCALE);
  pango_layout_context_changed(layout);

  pango_layout_set_text(layout, text, -1);
  pango_layout_get_pixel_extents(layout, &ink_rect, NULL);
  global_height += ink_rect.height;

  gdk_draw_layout_with_colors(drawing->vertical_ruler->window,
      drawing->ruler_gc_butt,
      1,
      1,
      layout, &foreground, &background);

  gdk_draw_line (drawing->vertical_ruler->window,
                   drawing->ruler_gc_round,
                   drawing->vertical_ruler-> allocation.width-1, 1,
                   drawing->vertical_ruler-> allocation.width-7, 1);


  snprintf(text, 255, "%d", 0);

  pango_layout_set_text(layout, text, -1);
  pango_layout_get_pixel_extents(layout, &ink_rect, NULL);
  global_height += ink_rect.height;

  if(global_height <= drawing->vertical_ruler->allocation.height)
  {
    gdk_draw_layout_with_colors(drawing->vertical_ruler->window,
      drawing->ruler_gc_butt,
      1,
      drawing->vertical_ruler->allocation.height - ink_rect.height-2,
      layout, &foreground, &background);

    gdk_draw_line (drawing->vertical_ruler->window,
                    drawing->ruler_gc_butt,
                    drawing->vertical_ruler-> allocation.width-1,
		    drawing->vertical_ruler->allocation.height-1,
                    drawing->vertical_ruler-> allocation.width-7,
  		    drawing->vertical_ruler->allocation.height-1);
  }


  snprintf(text, 255, "%.1f",(float) histo_cfv->max_height/2.0);

  pango_layout_set_text(layout, text, -1);
  pango_layout_get_pixel_extents(layout, &ink_rect, NULL);
  global_height += ink_rect.height;

  if(global_height <= drawing->vertical_ruler->allocation.height)
  {
    gdk_draw_layout_with_colors(drawing->vertical_ruler->window,
      drawing->ruler_gc_butt,
      1,
      (drawing->vertical_ruler->allocation.height - ink_rect.height)/2,
      layout, &foreground, &background);

    gdk_draw_line (drawing->vertical_ruler->window,
                   drawing->ruler_gc_butt,
                   drawing->vertical_ruler-> allocation.width-1,
		   drawing->vertical_ruler-> allocation.height/2,
                   drawing->vertical_ruler-> allocation.width-7,
		   drawing->vertical_ruler->allocation.height/2);
//.........这里部分代码省略.........