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
|
/*
* Copyright (C) 2020 MATE developers
*
* 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 2 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 <string.h>
#include <glib/gi18n.h>
#include <gdk/gdkkeysyms.h>
#include "math-history.h"
struct MathHistoryPrivate
{
MathEquation *equation;
MathHistoryEntry *entry;
char *prev_equation;
int items_count; /* Number of entries in history listbox */
GtkWidget *listbox;
};
G_DEFINE_TYPE_WITH_PRIVATE(MathHistory, math_history, GTK_TYPE_SCROLLED_WINDOW);
MathHistory *
math_history_new(MathEquation *equation)
{
MathHistory *history = g_object_new(math_history_get_type(), NULL);
history->priv->equation = g_object_ref(equation);
return history;
}
static void
scroll_bottom_cb(MathHistory *history, gpointer data)
{
GtkAdjustment *adjustment;
// TODO make this dynamic, do not hardcode listbox_height_request/number_of_rows
int width, height;
adjustment = gtk_list_box_get_adjustment(GTK_LIST_BOX(history->priv->listbox));
gtk_widget_get_size_request(GTK_WIDGET(history), &width, &height);
gtk_adjustment_set_page_size(adjustment, height / 3);
gtk_adjustment_set_value (adjustment, gtk_adjustment_get_upper (adjustment)
- gtk_adjustment_get_page_size (adjustment));
}
static gboolean
check_history(MathHistory *history, char *equation)
{ /* Checks if the last inserted calculation is the same as the current calculation to be inserted in history-history */
if (history->priv->items_count >= 1 && g_strcmp0(equation, history->priv->prev_equation)==0)
return TRUE; /* returns true if last entered equation is the same as the current equation */
else
return FALSE;
}
void
math_history_insert_entry (MathHistory *history, char *equation, MPNumber *answer, int number_base)
{ /* Inserts a new entry into the history-history listbox */
history->priv->entry = math_history_entry_new(history->priv->equation);
gboolean check = check_history (history, equation);
history->priv->prev_equation = g_strdup(equation);
if (!check)
{
math_history_entry_insert_entry(history->priv->entry, equation, answer, number_base);
if (history->priv->entry != NULL)
{
gtk_list_box_insert(GTK_LIST_BOX(history->priv->listbox), GTK_WIDGET(history->priv->entry), -1);
gtk_widget_set_can_focus(GTK_WIDGET(history->priv->entry), FALSE);
gtk_widget_show_all(GTK_WIDGET(history->priv->entry));
history->priv->items_count++;
}
}
g_signal_emit_by_name(history, "row-added");
}
static void
math_history_class_init(MathHistoryClass *klass)
{
g_signal_new("row-added",
G_TYPE_FROM_CLASS(klass),
G_SIGNAL_RUN_FIRST,
0,
NULL,
NULL,
NULL,
G_TYPE_NONE,
0,
NULL);
}
static void
math_history_init(MathHistory *history)
{
history->priv = math_history_get_instance_private(history);
gtk_scrolled_window_set_shadow_type(GTK_SCROLLED_WINDOW(history), GTK_SHADOW_IN);
gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(history), GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
gtk_scrolled_window_set_placement(GTK_SCROLLED_WINDOW(history), GTK_CORNER_TOP_LEFT);
history->priv->items_count = 0;
history->priv->prev_equation = "";
history->priv->listbox = gtk_list_box_new();
gtk_list_box_set_selection_mode(GTK_LIST_BOX(history->priv->listbox), GTK_SELECTION_NONE);
gtk_widget_show(GTK_WIDGET(history->priv->listbox));
gtk_container_add(GTK_CONTAINER(history), history->priv->listbox);
gtk_widget_set_valign(GTK_WIDGET(history->priv->listbox), GTK_ALIGN_END);
gtk_widget_set_size_request(GTK_WIDGET(history), 100, 100);
gtk_widget_set_can_focus(GTK_WIDGET(history), FALSE);
g_signal_connect(history, "row-added", G_CALLBACK(scroll_bottom_cb), NULL);
}
|
