add history view to show recent calculations.

add option to enable/disable history (disabled by default).
add possibility to resize mate-calc if history is enabled.

1 files changed, 129 insertions, 0 deletions

diff --git a/src/math-history-entry.c b/src/math-history-entry.c
new file mode 100644
index 0000000..baf3a7c
--- /dev/null
+++ b/src/math-history-entry.c
@@ -0,0 +1,129 @@
+/*
+ * 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-entry.h"
+
+struct MathHistoryEntryPrivate
+{
+    MathEquation *equation;
+
+    MPNumber *answer; /* Stores answer in MPNumber object */
+    char *equation_string; /* Stores equation to be entered in history-entry */
+    char *answer_string; /* Stores answer to be entered in history-entry */
+    GtkWidget *equation_label;
+    GtkWidget *answer_label;
+    GtkWidget *equation_eventbox;
+    GtkWidget *answer_eventbox;
+};
+
+G_DEFINE_TYPE_WITH_PRIVATE (MathHistoryEntry, math_history_entry, GTK_TYPE_LIST_BOX_ROW);
+
+#define UI_HISTORY_ENTRY_RESOURCE_PATH "/org/mate/calculator/ui/history-entry.ui"
+#define GET_WIDGET(ui, name) \
+          GTK_WIDGET(gtk_builder_get_object(ui, name))
+
+MathHistoryEntry *
+math_history_entry_new(MathEquation *equation)
+{
+    MathHistoryEntry *history_entry = g_object_new(math_history_entry_get_type(), NULL);
+    history_entry->priv->equation = g_object_ref(equation);
+    return history_entry;
+}
+
+void answer_clicked_cb(GtkWidget *widget, GdkEventButton *eventbutton, gpointer data);
+G_MODULE_EXPORT
+void
+answer_clicked_cb (GtkWidget *widget, GdkEventButton *eventbutton, gpointer data)
+{   /* Callback function for button-press-event on answer_eventbox */
+    GtkEventBox *event = (GtkEventBox*) widget;
+    MathHistoryEntry *history_entry = MATH_HISTORY_ENTRY(data);
+    if (event != NULL)
+    {
+        if (GTK_IS_BIN(event))
+        {
+            GtkWidget *answer_label = gtk_bin_get_child(GTK_BIN(event));
+            char *answer = gtk_widget_get_tooltip_text(answer_label);
+            if (answer != NULL)
+                math_equation_insert(history_entry->priv->equation, answer);
+        }
+    }
+}
+void equation_clicked_cb(GtkWidget *widget, GdkEventButton *eventbutton,  gpointer data);
+G_MODULE_EXPORT
+void
+equation_clicked_cb (GtkWidget *widget, GdkEventButton *eventbutton, gpointer data)
+{   /* Callback function for button-press-event on equation_eventbox */
+    GtkEventBox *event = (GtkEventBox*) widget;
+    MathHistoryEntry *history_entry = MATH_HISTORY_ENTRY(data);
+    if (event != NULL)
+    {
+        if (GTK_IS_BIN(event))
+        {
+            GtkLabel *equation_label = (GtkLabel*) gtk_bin_get_child(GTK_BIN(event));
+            const char *equation = gtk_label_get_text(equation_label);
+            if (equation  != NULL)
+                math_equation_set(history_entry->priv->equation, equation);
+        }
+    }
+}
+
+void
+math_history_entry_insert_entry(MathHistoryEntry *history_entry, char *equation, MPNumber *number, int number_base)
+{
+    GtkBuilder *builder = NULL;
+    GtkWidget *grid;
+    GError *error = NULL;
+    char *final_answer;
+    MpSerializer *serializer_nine = mp_serializer_new(MP_DISPLAY_FORMAT_AUTOMATIC, number_base, 9);
+    MpSerializer *serializer_four = mp_serializer_new(MP_DISPLAY_FORMAT_AUTOMATIC, number_base, 4);
+
+    history_entry->priv->answer = number;
+    history_entry->priv->equation_string = equation;
+    history_entry->priv->answer_string = mp_serializer_to_string(serializer_nine, history_entry->priv->answer);
+    final_answer = mp_serializer_to_string(serializer_four, history_entry->priv->answer);
+    
+    builder = gtk_builder_new();
+    if(gtk_builder_add_from_resource (builder, UI_HISTORY_ENTRY_RESOURCE_PATH, &error) == 0)
+    {
+        g_print("gtk_builder_add_from_resource FAILED\n");
+        g_print("%s\n",error->message);
+        return;
+    }
+    grid = GET_WIDGET(builder, "grid");
+    gtk_container_add(GTK_CONTAINER(history_entry), grid);
+    history_entry->priv->equation_label = GET_WIDGET(builder, "equation_label");
+    history_entry->priv->answer_label = GET_WIDGET(builder, "answer_label");
+    history_entry->priv->equation_eventbox = GET_WIDGET(builder, "equation_eventbox");
+    history_entry->priv->answer_eventbox = GET_WIDGET(builder, "answer_eventbox");
+    gtk_widget_set_tooltip_text(history_entry->priv->equation_label, history_entry->priv->equation_string); 
+    gtk_widget_set_tooltip_text(history_entry->priv->answer_label, history_entry->priv->answer_string); 
+    gtk_label_set_text(GTK_LABEL(history_entry->priv->equation_label), history_entry->priv->equation_string);
+    gtk_label_set_text(GTK_LABEL(history_entry->priv->answer_label), final_answer);
+    gtk_builder_connect_signals(builder, history_entry);
+}
+
+static void
+math_history_entry_class_init(MathHistoryEntryClass *klass)
+{
+}
+
+static void
+math_history_entry_init(MathHistoryEntry *history_entry)
+{
+    history_entry->priv = math_history_entry_get_instance_private(history_entry);
+    history_entry->priv->equation_string = "";
+    history_entry->priv->answer_string = "";
+}