Add increment and decrement controls for numeric display options

Signed-off-by: Ahmed Abouzied <email@aabouzied.com>

Author: ahmedaabouzied

DisplayOptionsPanel.c

@@ -20,9 +20,12 @@ in the source distribution for its full text.
 #include "ProvideCurses.h"
 
 
-static const char* const DisplayOptionsFunctions[] = {"(De)Select  ","Increment  ", "Decrement  ", "Done  ", NULL};
-static const char* const DisplayOptionsKeys[] = {"Enter","+", "-", "F10", "Esc"};
-static const int DisplayOptionsEvents[] = {KEY_ENTER, '+', '-', KEY_F(10), 27};
+static const char* const BooleanDisplayOptionsFunctions[] = {"Select  ", "Done  ", NULL};
+static const char* const BooleanDisplayOptionsKeys[] = {"Enter", "F10", "Esc"};
+static const int BooleanDisplayOptionsEvents[] = {KEY_ENTER, KEY_F(10), 27};
+static const char* const NumericDisplayOptionsFunctions[] = {"Decrement ", "Increment ", "Done  ", NULL};
+static const char* const NumericDisplayOptionsKeys[] = {"-", "+", "F10", "Esc"};
+static const int NumericDisplayOptionsEvents[] = {'-', '+', KEY_F(10), 27};
 
 static void DisplayOptionsPanel_delete(Object* object) {
    Panel* super = (Panel*) object;
@@ -31,13 +34,40 @@ static void DisplayOptionsPanel_delete(Object* object) {
    free(this);
 }
 
+static void DisplayOptionsPanel_setFunctionBar(Panel *super, OptionItem* item){
+   if (OptionItem_kind(item) == OPTION_ITEM_NUMBER) {
+      FunctionBar* fuBar = FunctionBar_new(NumericDisplayOptionsFunctions, NumericDisplayOptionsKeys, NumericDisplayOptionsEvents);
+      super->currentBar = fuBar;
+   } else {
+      FunctionBar* fuBar = FunctionBar_new(BooleanDisplayOptionsFunctions, BooleanDisplayOptionsKeys, BooleanDisplayOptionsEvents);
+      super->currentBar = fuBar;
+   }
+}
+
 static HandlerResult DisplayOptionsPanel_eventHandler(Panel* super, int ch) {
    DisplayOptionsPanel* this = (DisplayOptionsPanel*) super;
 
    HandlerResult result = IGNORED;
    OptionItem* selected = (OptionItem*) Panel_getSelected(super);
 
    switch (ch) {
+
+   case KEY_UP: {
+      int selected_index = Panel_getSelectedIndex(super);
+      if (selected_index > 1) {
+         OptionItem* next_to_select = (OptionItem*) Panel_get(super, selected_index -1);
+         DisplayOptionsPanel_setFunctionBar(super, next_to_select);
+      }
+      break;
+   }
+   case KEY_DOWN: {
+      int selected_index = Panel_getSelectedIndex(super);
+      if (selected_index < Panel_size(super) - 1) {
+         OptionItem* next_to_select = (OptionItem*) Panel_get(super, selected_index +1);
+         DisplayOptionsPanel_setFunctionBar(super, next_to_select);
+      }
+      break;
+   }
    case '\n':
    case '\r':
    case KEY_ENTER:
@@ -92,7 +122,7 @@ const PanelClass DisplayOptionsPanel_class = {
 DisplayOptionsPanel* DisplayOptionsPanel_new(Settings* settings, ScreenManager* scr) {
    DisplayOptionsPanel* this = AllocThis(DisplayOptionsPanel);
    Panel* super = (Panel*) this;
-   FunctionBar* fuBar = FunctionBar_new(DisplayOptionsFunctions, DisplayOptionsKeys, DisplayOptionsEvents);
+   FunctionBar* fuBar = FunctionBar_new(BooleanDisplayOptionsFunctions, BooleanDisplayOptionsKeys, BooleanDisplayOptionsEvents);
    Panel_init(super, 1, 1, 1, 1, Class(OptionItem), true, fuBar);
 
    this->settings = settings;