6 files changed, 100 insertions, 2 deletions
diff --git a/help/C/keyboard.page b/help/C/keyboard.page
index a522201..49e5c6f 100644
--- a/help/C/keyboard.page
+++ b/help/C/keyboard.page
@@ -39,4 +39,38 @@
 <p>
 To enter <link xref="superscript">superscript numbers</link> use <keyseq><key>Ctrl</key>number</keyseq>, for subscript use <keyseq><key>Alt</key>number</keyseq>.
 </p>
+ <p>
+ When in <link xref="mouse">programming mode</link>, to cycle between base digits use:
+ </p>
+ <table>
+ <tr>
+ <td><p>Binary</p></td>
+ <td><p><keyseq><key>Ctrl</key><key>B</key></keyseq></p></td>
+ </tr>
+ <tr>
+ <td><p>Octal</p></td>
+ <td><p><keyseq><key>Ctrl</key><key>O</key></keyseq></p></td>
+ </tr>
+ <tr>
+ <td><p>Decimal</p></td>
+ <td><p><keyseq><key>Ctrl</key><key>D</key></keyseq></p></td>
+ </tr>
+ <tr>
+ <td><p>Hexadecimal</p></td>
+ <td><p><keyseq><key>Ctrl</key><key>H</key></keyseq></p></td>
+ </tr>
+ </table>
+ <p>
+ To cycle between history entries you may use:
+ </p>
+ <table>
+ <tr>
+ <td><p>Previous Entry</p></td>
+ <td><p><keyseq><key>Alt</key><key>Up</key></keyseq></p></td>
+ </tr>
+ <tr>
+ <td><p>Next Entry</p></td>
+ <td><p><keyseq><key>Alt</key><key>Down</key></keyseq></p></td>
+ </tr>
+ </table>
 </page>
diff --git a/src/math-history-entry.c b/src/math-history-entry.c
index 8a6b4ae..8277f88 100644
--- a/src/math-history-entry.c
+++ b/src/math-history-entry.c
@@ -88,6 +88,12 @@ math_history_entry_insert_entry(MathHistoryEntry *history_entry, const gchar *eq
 #undef get_widget
 }
 
+gchar *
+math_history_entry_get_equation(MathHistoryEntry *history_entry)
+{
+ return gtk_widget_get_tooltip_text(history_entry->priv->equation_label);
+}
+
 static void
 math_history_entry_class_init(MathHistoryEntryClass *klass)
 {
diff --git a/src/math-history-entry.h b/src/math-history-entry.h
index 53ccc88..2133ade 100644
--- a/src/math-history-entry.h
+++ b/src/math-history-entry.h
@@ -44,6 +44,9 @@ math_history_entry_new(MathEquation *equation);
 void
 math_history_entry_insert_entry(MathHistoryEntry *history_entry, const gchar *equation, const gchar *answer_four_digits, const gchar *answer_nine_digits);
 
+gchar *
+math_history_entry_get_equation(MathHistoryEntry *history_entry);
+
 G_END_DECLS
 
 #endif /* MATH_HISTORY_ENTRY_VIEW_H */
diff --git a/src/math-history.c b/src/math-history.c
index 49d63a2..403a04f 100644
--- a/src/math-history.c
+++ b/src/math-history.c
@@ -22,6 +22,7 @@ struct MathHistoryPrivate
 
 gchar *last_answer;
 gchar *last_equation;
+ int current; /* 0 is the first entry, rows-1 the most recent entry */
 int rows;
 GtkWidget *listbox;
 };
@@ -82,6 +83,7 @@ math_history_insert_entry (MathHistory *history, char *equation, MPNumber *answe
 history->priv->last_answer = g_strdup(answer_nine_digits);
 history->priv->last_equation = g_strdup(equation);
 history->priv->rows++;
+ history->priv->current = history->priv->rows;
 g_signal_emit_by_name(history, "row-added");
 
 g_free(answer_four_digits);
@@ -94,12 +96,33 @@ 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;
+}
+
 static void
 math_history_class_init(MathHistoryClass *klass)
 {
@@ -124,6 +147,7 @@ math_history_init(MathHistory *history)
 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->current = 0;
 history->priv->rows = 0;
 history->priv->last_answer = g_strdup("");
 history->priv->last_equation = g_strdup("");
diff --git a/src/math-history.h b/src/math-history.h
index 7c7b079..87dab7a 100644
--- a/src/math-history.h
+++ b/src/math-history.h
@@ -45,6 +45,15 @@ math_history_new(MathEquation *equation);
 void
 math_history_insert_entry(MathHistory *history, char *equation, MPNumber *answer, int number_base);
 
+gpointer
+math_history_get_entry_at(MathHistory *history, int index);
+
+void
+math_history_set_current(MathHistory *history, int value);
+
+int
+math_history_get_current(MathHistory *history);
+
 void
 math_history_clear(MathHistory *history);
 
diff --git a/src/math-window.c b/src/math-window.c
index 08ac3e3..e872f4f 100644
--- a/src/math-window.c
+++ b/src/math-window.c
@@ -202,7 +202,29 @@ key_press_cb(MathWindow *window, GdkEventKey *event)
 gboolean result;
 g_signal_emit_by_name(window->priv->display, "key-press-event", event, &result);
 
- if (math_buttons_get_mode (window->priv->buttons) == PROGRAMMING && (event->state & GDK_CONTROL_MASK) == GDK_CONTROL_MASK) {
+ /* Keyboard navigation for history */
+ if ((event->state & GDK_MOD1_MASK) == GDK_MOD1_MASK && (event->keyval == GDK_KEY_Up || event->keyval == GDK_KEY_Down))
+ {
+ switch (event->keyval)
+ {
+ case GDK_KEY_Up:
+ math_history_set_current(window->priv->history, -1);
+ break;
+ case GDK_KEY_Down:
+ math_history_set_current(window->priv->history, 1);
+ break;
+ }
+
+ MathHistoryEntry *entry = math_history_get_entry_at(window->priv->history, math_history_get_current(window->priv->history));
+ if (entry)
+ {
+ gchar *equation_string = math_history_entry_get_equation(entry);
+ math_equation_set(window->priv->equation, equation_string);
+ g_free(equation_string);
+ }
+ return TRUE;
+ }
+ else if (math_buttons_get_mode (window->priv->buttons) == PROGRAMMING && (event->state & GDK_CONTROL_MASK) == GDK_CONTROL_MASK) {
 switch(event->keyval)
 {
 /* Binary */
@@ -540,7 +562,7 @@ static void create_menu(MathWindow* window)
 
 menu = add_menu(window->priv->menu_bar, VIEW_MENU_LABEL);
 window->priv->view_history_menu_item = add_menu_item(menu, gtk_check_menu_item_new_with_mnemonic(VIEW_HISTORY_LABEL), G_CALLBACK(history_check_toggled_cb), window);
- gtk_widget_add_accelerator(window->priv->view_history_menu_item, "activate", accel_group, GDK_KEY_H, GDK_CONTROL_MASK, GTK_ACCEL_VISIBLE);
+ gtk_widget_add_accelerator(window->priv->view_history_menu_item, "activate", accel_group, GDK_KEY_H, GDK_CONTROL_MASK | GDK_SHIFT_MASK, GTK_ACCEL_VISIBLE);
 
 menu = add_menu(window->priv->menu_bar, HELP_MENU_LABEL);
 menu_item = add_menu_item(menu, gtk_image_menu_item_new_from_icon("help-browser", HELP_CONTENTS_LABEL, accel_group), G_CALLBACK(help_cb), window);