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/*
* 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;
MpSerializer *serializer;
gchar *last_equation;
int current; /* 0 is the first entry, rows-1 the most recent entry */
int rows;
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));
}
void
math_history_insert_entry (MathHistory *history, char *equation, MPNumber *answer)
{
if (g_strcmp0(history->priv->last_equation, equation) == 0 && history->priv->rows >= 1)
{
return;
}
MathHistoryEntry *entry = math_history_entry_new(history->priv->equation);
math_history_entry_insert_entry(entry, equation, answer, history->priv->serializer);
gtk_list_box_insert(GTK_LIST_BOX(history->priv->listbox), GTK_WIDGET(entry), -1);
gtk_widget_set_can_focus(GTK_WIDGET(entry), FALSE);
gtk_widget_show(GTK_WIDGET(entry));
g_free(history->priv->last_equation);
history->priv->last_equation = g_strdup(equation);
history->priv->rows++;
history->priv->current = history->priv->rows;
g_signal_emit_by_name(history, "row-added");
}
void
math_history_clear(MathHistory *history)
{
GList *children, *iter;
history->priv->rows = 0;
history->priv->current = 0;
children = gtk_container_get_children(GTK_CONTAINER(history->priv->listbox));
for (iter = children; iter != NULL; iter = g_list_next(iter))
gtk_widget_destroy(GTK_WIDGET(iter->data));
g_list_free(children);
}
gpointer
math_history_get_entry_at(MathHistory *history, int index)
{
if (index >= 0 && index < history->priv->rows)
return MATH_HISTORY_ENTRY(gtk_list_box_get_row_at_index(GTK_LIST_BOX(history->priv->listbox), index));
return NULL;
}
void
math_history_set_current(MathHistory *history, int value)
{
history->priv->current = CLAMP (history->priv->current + value, 0, history->priv->rows - 1);
}
int
math_history_get_current(MathHistory *history)
{
return history->priv->current;
}
void
math_history_set_serializer(MathHistory *history, MpSerializer *serializer)
{
history->priv->serializer = serializer;
GList *children, *iter;
children = gtk_container_get_children(GTK_CONTAINER(history->priv->listbox));
for (iter = children; iter != NULL; iter = g_list_next(iter))
math_history_entry_redisplay(MATH_HISTORY_ENTRY(iter->data), serializer);
g_list_free(children);
}
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->serializer = NULL;
history->priv->current = 0;
history->priv->rows = 0;
history->priv->last_equation = g_strdup("");
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);
}
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