512 lines
15 KiB
C
512 lines
15 KiB
C
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/* GTK - The GIMP Toolkit
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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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 Lesser 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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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "gtkwidgetprivate.h"
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#include "gtknative.h"
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#include "gtkboxlayout.h"
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#include "gtkorientable.h"
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typedef struct _CompareInfo CompareInfo;
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enum Axis {
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HORIZONTAL = 0,
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VERTICAL = 1
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};
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struct _CompareInfo
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{
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GtkWidget *widget;
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int x;
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int y;
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guint reverse : 1;
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guint axis : 1;
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};
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static inline void
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get_axis_info (const graphene_rect_t *bounds,
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int axis,
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int *start,
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int *end)
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{
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if (axis == HORIZONTAL)
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{
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*start = bounds->origin.x;
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*end = bounds->size.width;
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}
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else if (axis == VERTICAL)
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{
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*start = bounds->origin.y;
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*end = bounds->size.height;
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}
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else
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g_assert(FALSE);
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}
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/* Utility function, equivalent to g_list_reverse */
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static void
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reverse_ptr_array (GPtrArray *arr)
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{
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int i;
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for (i = 0; i < arr->len / 2; i ++)
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{
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void *a = g_ptr_array_index (arr, i);
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void *b = g_ptr_array_index (arr, arr->len - 1 - i);
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arr->pdata[i] = b;
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arr->pdata[arr->len - 1 - i] = a;
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}
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}
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static int
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tab_sort_func (gconstpointer a,
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gconstpointer b,
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gpointer user_data)
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{
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graphene_rect_t child_bounds1, child_bounds2;
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GtkWidget *child1 = *((GtkWidget **)a);
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GtkWidget *child2 = *((GtkWidget **)b);
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GtkTextDirection text_direction = GPOINTER_TO_INT (user_data);
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float y1, y2;
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if (!gtk_widget_compute_bounds (child1, _gtk_widget_get_parent (child1), &child_bounds1) ||
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!gtk_widget_compute_bounds (child2, _gtk_widget_get_parent (child2), &child_bounds2))
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return 0;
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y1 = child_bounds1.origin.y + (child_bounds1.size.height / 2.0f);
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y2 = child_bounds2.origin.y + (child_bounds2.size.height / 2.0f);
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if (y1 == y2)
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{
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const float x1 = child_bounds1.origin.x + (child_bounds1.size.width / 2.0f);
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const float x2 = child_bounds2.origin.x + (child_bounds2.size.width / 2.0f);
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if (text_direction == GTK_TEXT_DIR_RTL)
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return (x1 < x2) ? 1 : ((x1 == x2) ? 0 : -1);
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else
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return (x1 < x2) ? -1 : ((x1 == x2) ? 0 : 1);
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}
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else
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return (y1 < y2) ? -1 : 1;
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}
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static void
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focus_sort_tab (GtkWidget *widget,
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GtkDirectionType direction,
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GPtrArray *focus_order)
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{
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GtkTextDirection text_direction = _gtk_widget_get_direction (widget);
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g_ptr_array_sort_with_data (focus_order, tab_sort_func, GINT_TO_POINTER (text_direction));
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if (direction == GTK_DIR_TAB_BACKWARD)
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reverse_ptr_array (focus_order);
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}
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/* Look for a child in @children that is intermediate between
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* the focus widget and container. This widget, if it exists,
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* acts as the starting widget for focus navigation.
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*/
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static GtkWidget *
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find_old_focus (GtkWidget *widget,
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GPtrArray *children)
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{
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int i;
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for (i = 0; i < children->len; i ++)
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{
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GtkWidget *child = g_ptr_array_index (children, i);
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GtkWidget *child_ptr = child;
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while (child_ptr && child_ptr != widget)
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{
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GtkWidget *parent;
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parent = _gtk_widget_get_parent (child_ptr);
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if (parent && (_gtk_widget_get_focus_child (parent) != child_ptr))
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{
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child = NULL;
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break;
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}
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child_ptr = parent;
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}
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if (child)
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return child;
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}
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return NULL;
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}
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static gboolean
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old_focus_coords (GtkWidget *widget,
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graphene_rect_t *old_focus_bounds)
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{
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GtkWidget *old_focus;
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old_focus = gtk_root_get_focus (gtk_widget_get_root (widget));
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if (old_focus)
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return gtk_widget_compute_bounds (old_focus, widget, old_focus_bounds);
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return FALSE;
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}
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static int
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axis_compare (gconstpointer a,
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gconstpointer b,
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gpointer user_data)
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{
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graphene_rect_t bounds1;
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graphene_rect_t bounds2;
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CompareInfo *compare = user_data;
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int start1, end1;
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int start2, end2;
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if (!gtk_widget_compute_bounds (*((GtkWidget **)a), compare->widget, &bounds1) ||
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!gtk_widget_compute_bounds (*((GtkWidget **)b), compare->widget, &bounds2))
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return 0;
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get_axis_info (&bounds1, compare->axis, &start1, &end1);
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get_axis_info (&bounds2, compare->axis, &start2, &end2);
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start1 = start1 + (end1 / 2);
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start2 = start2 + (end2 / 2);
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if (start1 == start2)
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{
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/* Now use origin/bounds to compare the 2 widgets on the other axis */
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get_axis_info (&bounds1, 1 - compare->axis, &start1, &end1);
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get_axis_info (&bounds2, 1 - compare->axis, &start2, &end2);
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int x1 = abs (start1 + (end1 / 2) - compare->x);
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int x2 = abs (start2 + (end2 / 2) - compare->x);
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if (compare->reverse)
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return (x1 < x2) ? 1 : ((x1 == x2) ? 0 : -1);
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else
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return (x1 < x2) ? -1 : ((x1 == x2) ? 0 : 1);
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}
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else
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return (start1 < start2) ? -1 : 1;
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}
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static void
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focus_sort_left_right (GtkWidget *widget,
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GtkDirectionType direction,
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GPtrArray *focus_order)
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{
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CompareInfo compare_info;
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GtkWidget *old_focus = _gtk_widget_get_focus_child (widget);
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graphene_rect_t old_bounds;
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compare_info.widget = widget;
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compare_info.reverse = (direction == GTK_DIR_LEFT);
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if (!old_focus)
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old_focus = find_old_focus (widget, focus_order);
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if (old_focus && gtk_widget_compute_bounds (old_focus, widget, &old_bounds))
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{
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float compare_y1;
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float compare_y2;
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float compare_x;
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int i;
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/* Delete widgets from list that don't match minimum criteria */
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compare_y1 = old_bounds.origin.y;
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compare_y2 = old_bounds.origin.y + old_bounds.size.height;
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if (direction == GTK_DIR_LEFT)
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compare_x = old_bounds.origin.x;
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else
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compare_x = old_bounds.origin.x + old_bounds.size.width;
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for (i = 0; i < focus_order->len; i ++)
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{
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GtkWidget *child = g_ptr_array_index (focus_order, i);
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if (child != old_focus)
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{
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graphene_rect_t child_bounds;
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if (gtk_widget_compute_bounds (child, widget, &child_bounds))
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{
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const float child_y1 = child_bounds.origin.y;
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const float child_y2 = child_bounds.origin.y + child_bounds.size.height;
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if ((child_y2 <= compare_y1 || child_y1 >= compare_y2) /* No vertical overlap */ ||
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(direction == GTK_DIR_RIGHT && child_bounds.origin.x + child_bounds.size.width < compare_x) || /* Not to left */
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(direction == GTK_DIR_LEFT && child_bounds.origin.x > compare_x)) /* Not to right */
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{
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g_ptr_array_remove_index (focus_order, i);
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i --;
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}
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}
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else
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{
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g_ptr_array_remove_index (focus_order, i);
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i --;
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}
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}
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}
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compare_info.y = (compare_y1 + compare_y2) / 2;
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compare_info.x = old_bounds.origin.x + (old_bounds.size.width / 2.0f);
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}
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else
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{
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/* No old focus widget, need to figure out starting x,y some other way
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*/
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graphene_rect_t bounds;
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GtkWidget *parent;
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graphene_rect_t old_focus_bounds;
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parent = gtk_widget_get_parent (widget);
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if (!gtk_widget_compute_bounds (widget, parent ? parent : widget, &bounds))
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graphene_rect_init (&bounds, 0, 0, 0, 0);
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if (old_focus_coords (widget, &old_focus_bounds))
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{
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compare_info.y = old_focus_bounds.origin.y + (old_focus_bounds.size.height / 2.0f);
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}
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else
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{
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if (!GTK_IS_NATIVE (widget))
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compare_info.y = bounds.origin.y + bounds.size.height;
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else
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compare_info.y = bounds.size.height / 2.0f;
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}
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if (!GTK_IS_NATIVE (widget))
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compare_info.x = (direction == GTK_DIR_RIGHT) ? bounds.origin.x : bounds.origin.x + bounds.size.width;
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else
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compare_info.x = (direction == GTK_DIR_RIGHT) ? 0 : bounds.size.width;
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}
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compare_info.axis = HORIZONTAL;
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g_ptr_array_sort_with_data (focus_order, axis_compare, &compare_info);
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if (compare_info.reverse)
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reverse_ptr_array (focus_order);
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}
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static void
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focus_sort_up_down (GtkWidget *widget,
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GtkDirectionType direction,
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GPtrArray *focus_order)
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{
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CompareInfo compare_info;
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GtkWidget *old_focus = _gtk_widget_get_focus_child (widget);
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graphene_rect_t old_bounds;
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compare_info.widget = widget;
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compare_info.reverse = (direction == GTK_DIR_UP);
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if (!old_focus)
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old_focus = find_old_focus (widget, focus_order);
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if (old_focus && gtk_widget_compute_bounds (old_focus, widget, &old_bounds))
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{
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float compare_x1;
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float compare_x2;
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float compare_y;
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int i;
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/* Delete widgets from list that don't match minimum criteria */
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compare_x1 = old_bounds.origin.x;
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compare_x2 = old_bounds.origin.x + old_bounds.size.width;
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if (direction == GTK_DIR_UP)
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compare_y = old_bounds.origin.y;
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else
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compare_y = old_bounds.origin.y + old_bounds.size.height;
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for (i = 0; i < focus_order->len; i ++)
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{
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GtkWidget *child = g_ptr_array_index (focus_order, i);
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if (child != old_focus)
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{
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graphene_rect_t child_bounds;
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if (gtk_widget_compute_bounds (child, widget, &child_bounds))
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{
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const float child_x1 = child_bounds.origin.x;
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const float child_x2 = child_bounds.origin.x + child_bounds.size.width;
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if ((child_x2 <= compare_x1 || child_x1 >= compare_x2) /* No horizontal overlap */ ||
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(direction == GTK_DIR_DOWN && child_bounds.origin.y + child_bounds.size.height < compare_y) || /* Not below */
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(direction == GTK_DIR_UP && child_bounds.origin.y > compare_y)) /* Not above */
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{
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g_ptr_array_remove_index (focus_order, i);
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i --;
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}
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}
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else
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{
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g_ptr_array_remove_index (focus_order, i);
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i --;
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}
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}
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}
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compare_info.x = (compare_x1 + compare_x2) / 2;
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compare_info.y = old_bounds.origin.y + (old_bounds.size.height / 2.0f);
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}
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else
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||
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|
{
|
||
|
|
/* No old focus widget, need to figure out starting x,y some other way
|
||
|
|
*/
|
||
|
|
GtkWidget *parent;
|
||
|
|
graphene_rect_t bounds;
|
||
|
|
graphene_rect_t old_focus_bounds;
|
||
|
|
|
||
|
|
parent = gtk_widget_get_parent (widget);
|
||
|
|
if (!gtk_widget_compute_bounds (widget, parent ? parent : widget, &bounds))
|
||
|
|
graphene_rect_init (&bounds, 0, 0, 0, 0);
|
||
|
|
|
||
|
|
if (old_focus_coords (widget, &old_focus_bounds))
|
||
|
|
{
|
||
|
|
compare_info.x = old_focus_bounds.origin.x + (old_focus_bounds.size.width / 2.0f);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
if (!GTK_IS_NATIVE (widget))
|
||
|
|
compare_info.x = bounds.origin.x + (bounds.size.width / 2.0f);
|
||
|
|
else
|
||
|
|
compare_info.x = bounds.size.width / 2.0f;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!GTK_IS_NATIVE (widget))
|
||
|
|
compare_info.y = (direction == GTK_DIR_DOWN) ? bounds.origin.y : bounds.origin.y + bounds.size.height;
|
||
|
|
else
|
||
|
|
compare_info.y = (direction == GTK_DIR_DOWN) ? 0 : + bounds.size.height;
|
||
|
|
}
|
||
|
|
|
||
|
|
compare_info.axis = VERTICAL;
|
||
|
|
g_ptr_array_sort_with_data (focus_order, axis_compare, &compare_info);
|
||
|
|
|
||
|
|
if (compare_info.reverse)
|
||
|
|
reverse_ptr_array (focus_order);
|
||
|
|
}
|
||
|
|
|
||
|
|
void
|
||
|
|
gtk_widget_focus_sort (GtkWidget *widget,
|
||
|
|
GtkDirectionType direction,
|
||
|
|
GPtrArray *focus_order)
|
||
|
|
{
|
||
|
|
GtkWidget *child;
|
||
|
|
|
||
|
|
g_assert (focus_order != NULL);
|
||
|
|
|
||
|
|
if (focus_order->len == 0)
|
||
|
|
{
|
||
|
|
/* Initialize the list with all visible child widgets */
|
||
|
|
for (child = _gtk_widget_get_first_child (widget);
|
||
|
|
child != NULL;
|
||
|
|
child = _gtk_widget_get_next_sibling (child))
|
||
|
|
{
|
||
|
|
if (_gtk_widget_get_mapped (child) &&
|
||
|
|
gtk_widget_get_sensitive (child))
|
||
|
|
g_ptr_array_add (focus_order, child);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Now sort that list depending on @direction */
|
||
|
|
switch (direction)
|
||
|
|
{
|
||
|
|
case GTK_DIR_TAB_FORWARD:
|
||
|
|
case GTK_DIR_TAB_BACKWARD:
|
||
|
|
{
|
||
|
|
GtkLayoutManager *layout = gtk_widget_get_layout_manager (widget);
|
||
|
|
if (GTK_IS_BOX_LAYOUT (layout))
|
||
|
|
{
|
||
|
|
GtkOrientation orientation = gtk_orientable_get_orientation (GTK_ORIENTABLE (layout));
|
||
|
|
if (orientation == GTK_ORIENTATION_HORIZONTAL)
|
||
|
|
{
|
||
|
|
if (direction == GTK_DIR_TAB_FORWARD)
|
||
|
|
focus_sort_left_right (widget, GTK_DIR_RIGHT, focus_order);
|
||
|
|
else
|
||
|
|
focus_sort_left_right (widget, GTK_DIR_LEFT, focus_order);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
if (direction == GTK_DIR_TAB_FORWARD)
|
||
|
|
focus_sort_up_down (widget, GTK_DIR_DOWN, focus_order);
|
||
|
|
else
|
||
|
|
focus_sort_up_down (widget, GTK_DIR_UP, focus_order);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
focus_sort_tab (widget, direction, focus_order);
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case GTK_DIR_UP:
|
||
|
|
case GTK_DIR_DOWN:
|
||
|
|
focus_sort_up_down (widget, direction, focus_order);
|
||
|
|
break;
|
||
|
|
case GTK_DIR_LEFT:
|
||
|
|
case GTK_DIR_RIGHT:
|
||
|
|
focus_sort_left_right (widget, direction, focus_order);
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
g_assert_not_reached ();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
gboolean
|
||
|
|
gtk_widget_focus_move (GtkWidget *widget,
|
||
|
|
GtkDirectionType direction)
|
||
|
|
{
|
||
|
|
GPtrArray *focus_order;
|
||
|
|
GtkWidget *focus_child = _gtk_widget_get_focus_child (widget);
|
||
|
|
int i;
|
||
|
|
gboolean ret = FALSE;
|
||
|
|
|
||
|
|
focus_order = g_ptr_array_new ();
|
||
|
|
gtk_widget_focus_sort (widget, direction, focus_order);
|
||
|
|
|
||
|
|
for (i = 0; i < focus_order->len && !ret; i++)
|
||
|
|
{
|
||
|
|
GtkWidget *child = g_ptr_array_index (focus_order, i);
|
||
|
|
|
||
|
|
if (focus_child)
|
||
|
|
{
|
||
|
|
if (focus_child == child)
|
||
|
|
{
|
||
|
|
focus_child = NULL;
|
||
|
|
ret = gtk_widget_child_focus (child, direction);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else if (_gtk_widget_get_mapped (child) &&
|
||
|
|
gtk_widget_is_ancestor (child, widget))
|
||
|
|
{
|
||
|
|
ret = gtk_widget_child_focus (child, direction);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
g_ptr_array_unref (focus_order);
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|