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authorEmmanuele Bassi <ebassi@gnome.org>2021-02-17 17:41:56 +0000
committerEmmanuele Bassi <ebassi@gnome.org>2021-03-11 16:37:30 +0000
commit6f93e63d214e4a0d008a0d79c32101ae0da1f4e8 (patch)
tree0016ea8bf361517b65b16e576ffeff0450721428 /gdk/gdkpango.c
parent04fb95ce9f65f3464bcabe42d1c6092ac6719a7d (diff)
downloadgtk+-6f93e63d214e4a0d008a0d79c32101ae0da1f4e8.tar.gz
docs: Move detached sections into their own content file
Diffstat (limited to 'gdk/gdkpango.c')
-rw-r--r--gdk/gdkpango.c95
1 files changed, 0 insertions, 95 deletions
diff --git a/gdk/gdkpango.c b/gdk/gdkpango.c
index e050b985c6..5c25b3521b 100644
--- a/gdk/gdkpango.c
+++ b/gdk/gdkpango.c
@@ -25,101 +25,6 @@
#include <pango/pangocairo.h>
-/**
- * SECTION:pango_interaction
- * @Short_description: Using Pango in GDK
- * @Title: Pango Interaction
- *
- * Pango is the text layout system used by GDK and GTK. The functions
- * and types in this section are used to obtain clip regions for
- * #PangoLayouts, and to get #PangoContexts that can be used with
- * GDK.
- *
- * Creating a #PangoLayout object is the first step in rendering text,
- * and requires getting a handle to a #PangoContext. For GTK programs,
- * you’ll usually want to use gtk_widget_get_pango_context(), or
- * gtk_widget_create_pango_layout(). Once you have a #PangoLayout,
- * you can set the text and attributes of it with Pango functions like
- * pango_layout_set_text() and get its size with pango_layout_get_size().
- * (Note that Pango uses a fixed point system internally, so converting
- * between Pango units and pixels using [PANGO_SCALE][PANGO-SCALE-CAPS]
- * or the PANGO_PIXELS() macro.)
- *
- * Rendering a Pango layout is done most simply with pango_cairo_show_layout();
- * you can also draw pieces of the layout with pango_cairo_show_layout_line().
- *
- * ## Draw transformed text with Pango and cairo ## {#rotated-example}
- *
- * |[<!-- language="C" -->
- * #define RADIUS 100
- * #define N_WORDS 10
- * #define FONT "Sans Bold 18"
- *
- * PangoContext *context;
- * PangoLayout *layout;
- * PangoFontDescription *desc;
- *
- * double radius;
- * int width, height;
- * int i;
- *
- * // Set up a transformation matrix so that the user space coordinates for
- * // where we are drawing are [-RADIUS, RADIUS], [-RADIUS, RADIUS]
- * // We first center, then change the scale
- *
- * width = gdk_surface_get_width (surface);
- * height = gdk_surface_get_height (surface);
- * radius = MIN (width, height) / 2.;
- *
- * cairo_translate (cr,
- * radius + (width - 2 * radius) / 2,
- * radius + (height - 2 * radius) / 2);
- * cairo_scale (cr, radius / RADIUS, radius / RADIUS);
- *
- * // Create a PangoLayout, set the font and text
- * context = gdk_pango_context_get_for_display (display);
- * layout = pango_layout_new (context);
- * pango_layout_set_text (layout, "Text", -1);
- * desc = pango_font_description_from_string (FONT);
- * pango_layout_set_font_description (layout, desc);
- * pango_font_description_free (desc);
- *
- * // Draw the layout N_WORDS times in a circle
- * for (i = 0; i < N_WORDS; i++)
- * {
- * double red, green, blue;
- * double angle = 2 * G_PI * i / n_words;
- *
- * cairo_save (cr);
- *
- * // Gradient from red at angle == 60 to blue at angle == 300
- * red = (1 + cos (angle - 60)) / 2;
- * green = 0;
- * blue = 1 - red;
- *
- * cairo_set_source_rgb (cr, red, green, blue);
- * cairo_rotate (cr, angle);
- *
- * // Inform Pango to re-layout the text with the new transformation matrix
- * pango_cairo_update_layout (cr, layout);
- *
- * pango_layout_get_size (layout, &width, &height);
- *
- * cairo_move_to (cr, - width / 2 / PANGO_SCALE, - DEFAULT_TEXT_RADIUS);
- * pango_cairo_show_layout (cr, layout);
- *
- * cairo_restore (cr);
- * }
- *
- * g_object_unref (layout);
- * g_object_unref (context);
- * ]|
- *
- * ## Output of the [example][rotated-example] above.
- *
- * ![](rotated-text.png)
- */
-
/* Get a clip region to draw only part of a layout. index_ranges
* contains alternating range starts/stops. The region is the
* region which contains the given ranges, i.e. if you draw with the