1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
|
/*
* Copyright (C) 2014, Andrew P. <pan.pav.7c5@gmail.com>
* Copyright (C) 2017 - 2020, Sean Davis <sean@bluesabre.org>
*
* This program is free software: you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any later
* version. See http://www.gnu.org/copyleft/gpl.html the full text of the
* license.
*/
#include <gtk/gtk.h>
#include "greetermenubar.h"
static void greeter_menu_bar_size_allocate(GtkWidget* widget, GtkAllocation* allocation);
G_DEFINE_TYPE(GreeterMenuBar, greeter_menu_bar, GTK_TYPE_MENU_BAR);
static void
greeter_menu_bar_class_init(GreeterMenuBarClass* klass)
{
GtkWidgetClass* widget_class = GTK_WIDGET_CLASS(klass);
widget_class->size_allocate = greeter_menu_bar_size_allocate;
}
static void
greeter_menu_bar_init(GreeterMenuBar* square)
{
}
GtkWidget*
greeter_menu_bar_new(void)
{
return GTK_WIDGET(g_object_new(greeter_menu_bar_get_type(), NULL));
}
static gint
sort_minimal_size(gconstpointer a, gconstpointer b, GtkRequestedSize* sizes)
{
gint a_size = sizes[GPOINTER_TO_INT(a)].natural_size;
gint b_size = sizes[GPOINTER_TO_INT(b)].natural_size;
return a_size == b_size ? 0 : a_size > b_size ? -1 : +1;
}
static void
greeter_menu_bar_size_allocate(GtkWidget* widget, GtkAllocation* allocation)
{
GtkPackDirection pack_direction;
GList *item;
GList *shell_children;
GList *expand_nums = NULL;
guint visible_count = 0;
guint expand_count = 0;
g_return_if_fail(allocation != NULL);
g_return_if_fail(GREETER_IS_MENU_BAR(widget));
gtk_widget_set_allocation(widget, allocation);
pack_direction = gtk_menu_bar_get_pack_direction(GTK_MENU_BAR(widget));
g_return_if_fail(pack_direction == GTK_PACK_DIRECTION_LTR || pack_direction == GTK_PACK_DIRECTION_RTL);
shell_children = gtk_container_get_children(GTK_CONTAINER(widget));
for(item = shell_children; item; item = g_list_next(item))
if(gtk_widget_get_visible(item->data))
{
if(gtk_widget_compute_expand(item->data, GTK_ORIENTATION_HORIZONTAL))
{
expand_nums = g_list_prepend(expand_nums, GINT_TO_POINTER(visible_count));
expand_count++;
}
visible_count++;
}
if(gtk_widget_get_realized(widget))
gdk_window_move_resize(gtk_widget_get_window(widget),
allocation->x, allocation->y,
allocation->width, allocation->height);
if(visible_count > 0)
{
GtkAllocation remaining_space;
GtkStyleContext* context = gtk_widget_get_style_context(widget);
GtkStateFlags flags = gtk_widget_get_state_flags(widget);
GtkRequestedSize* requested_sizes = g_newa(GtkRequestedSize, visible_count);
guint border_width = gtk_container_get_border_width(GTK_CONTAINER(widget));
GtkShadowType shadow_type = GTK_SHADOW_OUT;
GtkBorder border;
gint toggle_size;
GtkRequestedSize* request;
gboolean ltr;
int size;
gtk_style_context_get_padding(context, flags, &border);
gtk_widget_style_get(widget, "shadow-type", &shadow_type, NULL);
remaining_space.x = (border_width + border.left);
remaining_space.y = (border_width + border.top);
remaining_space.width = allocation->width -
2 * border_width - border.left - border.right;
remaining_space.height = allocation->height -
2 * border_width - border.top - border.bottom;
if (shadow_type != GTK_SHADOW_NONE)
{
gtk_style_context_get_border(context, flags, &border);
remaining_space.x += border.left;
remaining_space.y += border.top;
remaining_space.width -= border.left + border.right;
remaining_space.height -= border.top + border.bottom;
}
request = requested_sizes;
size = remaining_space.width;
ltr = (gtk_widget_get_direction(widget) == GTK_TEXT_DIR_LTR) == (pack_direction == GTK_PACK_DIRECTION_LTR);
for(item = shell_children; item; item = g_list_next(item))
{
if (!gtk_widget_get_visible(item->data))
continue;
request->data = item->data;
gtk_widget_get_preferred_width_for_height(item->data, remaining_space.height,
&request->minimum_size,
&request->natural_size);
gtk_menu_item_toggle_size_request(GTK_MENU_ITEM(item->data),
&toggle_size);
request->minimum_size += toggle_size;
request->natural_size += toggle_size;
gtk_menu_item_toggle_size_allocate(GTK_MENU_ITEM(item->data), toggle_size);
size -= request->minimum_size;
request++;
}
size = gtk_distribute_natural_allocation(size, visible_count, requested_sizes);
/* Distribution extra space for widgets with expand=True */
if(size > 0 && expand_nums)
{
GList *first_item = NULL;
gint needed_size = -1;
gint max_size = 0;
gint total_needed_size = 0;
expand_nums = g_list_sort_with_data(expand_nums, (GCompareDataFunc)sort_minimal_size,
requested_sizes);
first_item = expand_nums;
max_size = requested_sizes[GPOINTER_TO_INT(first_item->data)].natural_size;
/* Free space that all widgets need to have the same (max_size) width
* [___max_width___][widget ][widget____ ]
* total_needed_size := [] + [ ] + [ ]
* total_needed_size = [ ]
*/
for(item = g_list_next(expand_nums); item; item = g_list_next(item))
total_needed_size += max_size - requested_sizes[GPOINTER_TO_INT(item->data)].natural_size;
while(first_item)
{
if(size >= total_needed_size)
{
/* total_needed_size is enough for all remaining widgets */
needed_size = max_size + (size - total_needed_size)/expand_count;
break;
}
/* Removing current maximal widget from list */
total_needed_size -= max_size - requested_sizes[GPOINTER_TO_INT(first_item->data)].natural_size;
first_item = g_list_next(first_item);
if(first_item)
max_size = requested_sizes[GPOINTER_TO_INT(first_item->data)].natural_size;
}
for(item = first_item; item; item = g_list_next(item))
{
gint dsize = 0;
request = &requested_sizes[GPOINTER_TO_INT(item->data)];
dsize = needed_size - request->natural_size;
if(size < dsize)
dsize = size;
size -= dsize;
request->natural_size += dsize;
}
}
for(guint i = 0; i < visible_count; i++)
{
GtkAllocation child_allocation = remaining_space;
request = &requested_sizes[i];
child_allocation.width = request->natural_size;
remaining_space.width -= request->natural_size;
if (ltr)
remaining_space.x += request->natural_size;
else
child_allocation.x += remaining_space.width;
gtk_widget_size_allocate(request->data, &child_allocation);
}
g_list_free(expand_nums);
}
g_list_free(shell_children);
}
|
