188 lines
6.3 KiB
C
188 lines
6.3 KiB
C
/* GAIL - The GNOME Accessibility Implementation Library
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* Copyright 2001 Sun Microsystems Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include "config.h"
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#include <math.h>
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#include <stdlib.h>
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#include <gtk/gtk.h>
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#include "gailmisc.h"
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/* IMPORTANT!!! This source file does NOT contain the implementation
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* code for AtkUtil - for that code, please see gail/gail.c.
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*/
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/**
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* SECTION:gailmisc
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* @Short_description: GailMisc is a set of utility functions which may be
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* useful to implementors of Atk interfaces for custom widgets.
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* @Title: GailMisc
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*
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* GailMisc is a set of utility function which are used in the implemementation
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* of Atk interfaces for GTK+ widgets. They may be useful to implementors of
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* Atk interfaces for custom widgets.
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*/
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/**
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* gail_misc_get_extents_from_pango_rectangle:
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* @widget: The widget that contains the PangoLayout, that contains
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* the PangoRectangle
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* @char_rect: The #PangoRectangle from which to calculate extents
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* @x_layout: The x-offset at which the widget displays the
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* PangoLayout that contains the PangoRectangle, relative to @widget
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* @y_layout: The y-offset at which the widget displays the
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* PangoLayout that contains the PangoRectangle, relative to @widget
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* @x: The x-position of the #PangoRectangle relative to @coords
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* @y: The y-position of the #PangoRectangle relative to @coords
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* @width: The width of the #PangoRectangle
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* @height: The height of the #PangoRectangle
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* @coords: An #AtkCoordType enumeration
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*
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* Gets the extents of @char_rect in device coordinates,
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* relative to either top-level window or screen coordinates as
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* specified by @coords.
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**/
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void
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gail_misc_get_extents_from_pango_rectangle (GtkWidget *widget,
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PangoRectangle *char_rect,
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gint x_layout,
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gint y_layout,
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gint *x,
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gint *y,
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gint *width,
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gint *height,
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AtkCoordType coords)
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{
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gint x_window, y_window, x_toplevel, y_toplevel;
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gail_misc_get_origins (widget, &x_window, &y_window,
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&x_toplevel, &y_toplevel);
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*x = (char_rect->x / PANGO_SCALE) + x_layout + x_window;
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*y = (char_rect->y / PANGO_SCALE) + y_layout + y_window;
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if (coords == ATK_XY_WINDOW)
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{
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*x -= x_toplevel;
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*y -= y_toplevel;
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}
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else if (coords != ATK_XY_SCREEN)
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{
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*x = 0;
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*y = 0;
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*height = 0;
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*width = 0;
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return;
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}
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*height = char_rect->height / PANGO_SCALE;
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*width = char_rect->width / PANGO_SCALE;
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return;
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}
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/**
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* gail_misc_get_index_at_point_in_layout:
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* @widget: A #GtkWidget
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* @layout: The #PangoLayout from which to get the index at the
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* specified point.
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* @x_layout: The x-offset at which the widget displays the
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* #PangoLayout, relative to @widget
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* @y_layout: The y-offset at which the widget displays the
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* #PangoLayout, relative to @widget
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* @x: The x-coordinate relative to @coords at which to
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* calculate the index
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* @y: The y-coordinate relative to @coords at which to
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* calculate the index
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* @coords: An #AtkCoordType enumeration
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*
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* Gets the byte offset at the specified @x and @y in a #PangoLayout.
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*
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* Returns: the byte offset at the specified @x and @y in a
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* #PangoLayout
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**/
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gint
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gail_misc_get_index_at_point_in_layout (GtkWidget *widget,
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PangoLayout *layout,
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gint x_layout,
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gint y_layout,
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gint x,
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gint y,
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AtkCoordType coords)
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{
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gint index, x_window, y_window, x_toplevel, y_toplevel;
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gint x_temp, y_temp;
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gboolean ret;
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gail_misc_get_origins (widget, &x_window, &y_window,
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&x_toplevel, &y_toplevel);
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x_temp = x - x_layout - x_window;
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y_temp = y - y_layout - y_window;
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if (coords == ATK_XY_WINDOW)
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{
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x_temp += x_toplevel;
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y_temp += y_toplevel;
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}
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else if (coords != ATK_XY_SCREEN)
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return -1;
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ret = pango_layout_xy_to_index (layout,
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x_temp * PANGO_SCALE,
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y_temp * PANGO_SCALE,
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&index, NULL);
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if (!ret)
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{
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if (x_temp < 0 || y_temp < 0)
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index = 0;
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else
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index = -1;
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}
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return index;
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}
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/**
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* gail_misc_get_origins:
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* @widget: a #GtkWidget
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* @x_window: the x-origin of the widget->window
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* @y_window: the y-origin of the widget->window
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* @x_toplevel: the x-origin of the toplevel window for widget->window
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* @y_toplevel: the y-origin of the toplevel window for widget->window
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*
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* Gets the origin of the widget window, and the origin of the
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* widgets top-level window.
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**/
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void
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gail_misc_get_origins (GtkWidget *widget,
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gint *x_window,
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gint *y_window,
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gint *x_toplevel,
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gint *y_toplevel)
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{
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GdkWindow *window;
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if (GTK_IS_TREE_VIEW (widget))
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window = gtk_tree_view_get_bin_window (GTK_TREE_VIEW (widget));
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else
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window = gtk_widget_get_window (widget);
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gdk_window_get_origin (window, x_window, y_window);
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window = gdk_window_get_toplevel (gtk_widget_get_window (widget));
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gdk_window_get_origin (window, x_toplevel, y_toplevel);
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}
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