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GTK+ Reference Manual | ![]() |
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#include <gtk/gtk.h> GtkPrintContext;cairo_t * gtk_print_context_get_cairo_context (GtkPrintContext *context);void gtk_print_context_set_cairo_context (GtkPrintContext *context,cairo_t *cr,double dpi_x,double dpi_y); GtkPageSetup* gtk_print_context_get_page_setup (GtkPrintContext *context);gdouble gtk_print_context_get_width (GtkPrintContext *context);gdouble gtk_print_context_get_height (GtkPrintContext *context);gdouble gtk_print_context_get_dpi_x (GtkPrintContext *context);gdouble gtk_print_context_get_dpi_y (GtkPrintContext *context);PangoFontMap * gtk_print_context_get_pango_fontmap (GtkPrintContext *context);PangoContext * gtk_print_context_create_pango_context (GtkPrintContext *context);PangoLayout * gtk_print_context_create_pango_layout (GtkPrintContext *context);
A GtkPrintContext encapsulates context information that is required when
drawing pages for printing, such as the cairo context and important
parameters like page size and resolution. It also lets you easily
create
GtkPrintContext objects gets passed to the ::begin-print, ::end-print, ::request-page-setup and ::draw-page signals on the GtkPrintOperation.
Example 2. Using GtkPrintContext in a ::draw-page callback
static void draw_page (GtkPrintOperation *operation, GtkPrintContext *context, int page_nr) { cairo_t *cr; PangoLayout *layout; PangoFontDescription *desc; cr = gtk_print_context_get_cairo (context); /* Draw a red rectangle, as wide as the paper (inside the margins) */ cairo_set_source_rgb (cr, 1.0, 0, 0); cairo_rectangle (cr, 0, 0, gtk_print_context_get_width (context), 50); cairo_fill (cr); /* Draw some lines */ cairo_move_to (cr, 20, 10); cairo_line_to (cr, 40, 20); cairo_arc (cr, 60, 60, 20, 0, M_PI); cairo_line_to (cr, 80, 20); cairo_set_source_rgb (cr, 0, 0, 0); cairo_set_line_width (cr, 5); cairo_set_line_cap (cr, CAIRO_LINE_CAP_ROUND); cairo_set_line_join (cr, CAIRO_LINE_JOIN_ROUND); cairo_stroke (cr); /* Draw some text */ layout = gtk_print_context_create_layout (context); pango_layout_set_text (layout, "Hello World! Printing is easy", -1); desc = pango_font_description_from_string ("sans 28"); pango_layout_set_font_description (layout, desc); pango_font_description_free (desc); cairo_move_to (cr, 30, 20); pango_cairo_layout_path (cr, layout); /* Font Outline */ cairo_set_source_rgb (cr, 0.93, 1.0, 0.47); cairo_set_line_width (cr, 0.5); cairo_stroke_preserve (cr); /* Font Fill */ cairo_set_source_rgb (cr, 0, 0.0, 1.0); cairo_fill (cr); g_object_unref (layout); }
Printing support was added in GTK+ 2.10.
cairo_t * gtk_print_context_get_cairo_context (GtkPrintContext *context);
Obtains the cairo context that is associated with the GtkPrintContext.
context : |
a GtkPrintContext |
Returns : | the cairo context of context
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Since 2.10
void gtk_print_context_set_cairo_context (GtkPrintContext *context,cairo_t *cr,double dpi_x,double dpi_y);
context : |
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cr : |
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dpi_x : |
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dpi_y : |
GtkPageSetup* gtk_print_context_get_page_setup (GtkPrintContext *context);
Obtains the GtkPageSetup that determines the page dimensions of the GtkPrintContext.
context : |
a GtkPrintContext |
Returns : | the page setup of context
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Since 2.10
gdouble gtk_print_context_get_width (GtkPrintContext *context);
Obtains the width of the GtkPrintContext, in pixels.
context : |
a GtkPrintContext |
Returns : | the width of context
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Since 2.10
gdouble gtk_print_context_get_height (GtkPrintContext *context);
Obtains the width of the GtkPrintContext, in pixels.
context : |
a GtkPrintContext |
Returns : | the height of context
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Since 2.10
gdouble gtk_print_context_get_dpi_x (GtkPrintContext *context);
Obtains the horizontal resolution of the GtkPrintContext, in dots per inch.
context : |
a GtkPrintContext |
Returns : | the horizontal resolution of context
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Since 2.10
gdouble gtk_print_context_get_dpi_y (GtkPrintContext *context);
Obtains the vertical resolution of the GtkPrintContext, in dots per inch.
context : |
a GtkPrintContext |
Returns : | the vertical resolution of context
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Since 2.10
PangoFontMap * gtk_print_context_get_pango_fontmap (GtkPrintContext *context);
Returns a
context : |
a GtkPrintContext |
Returns : | the font map of context
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Since 2.10
PangoContext * gtk_print_context_create_pango_context (GtkPrintContext *context);
Creates a new
context : |
a GtkPrintContext |
Returns : | a new Pango context for context
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Since 2.10
PangoLayout * gtk_print_context_create_pango_layout (GtkPrintContext *context);
Creates a new
context : |
a GtkPrintContext |
Returns : | a new Pango layout for context
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Since 2.10