From 418d081f6e106fba5ed05fddcd13bf4f93eab2de Mon Sep 17 00:00:00 2001
From: Felix Raimundo <felix.raimundo@numworks.com>
Date: Fri, 25 Mar 2016 17:21:50 +0100
Subject: [PATCH] Add the trig menu.

Change-Id: Ifbe2518cb3a089dace82d56031987fbc7a2e6181
---
 app/utils.cpp                          | 91 +++++++++++++++++++++++++-
 ion/include/ion/events.h               |  4 +-
 ion/src/shared/events.c                |  4 +-
 ion/src/simulator/keyboard/fltkkbd.cpp |  4 +-
 kandinsky/include/kandinsky/text.h     |  2 +-
 kandinsky/src/text.c                   |  2 +-
 6 files changed, 99 insertions(+), 8 deletions(-)

diff --git a/app/utils.cpp b/app/utils.cpp
index 62ef83a00..52afdd5e1 100644
--- a/app/utils.cpp
+++ b/app/utils.cpp
@@ -34,6 +34,85 @@ static void print_prompt(char* text, int index) {
   KDDrawChar(text[index], KDPointMake(index * font_size.width, SCREEN_HEIGHT - (PROMPT_HEIGHT / 2)), true);
 }
 
+static void clear_trig_menu() {
+  {
+    KDRect r;
+    r.x = SCREEN_WIDTH / 4 - 1;
+    r.y = SCREEN_HEIGHT / 4 - 1;
+    r.width = SCREEN_WIDTH / 2 + 2;
+    r.height = SCREEN_HEIGHT / 2 + 2;
+    KDFillRect(r, 0x00);
+  }
+}
+
+static void print_trig_menu() {
+  {
+    KDRect r;
+    r.x = SCREEN_WIDTH / 4 - 1;
+    r.y = SCREEN_HEIGHT / 4 - 1;
+    r.width = SCREEN_WIDTH / 2 + 2;
+    r.height = SCREEN_HEIGHT / 2 + 2;
+    KDFillRect(r, 0xFF);
+  }
+  {
+    KDRect r;
+    r.x = SCREEN_WIDTH / 4;
+    r.y = SCREEN_HEIGHT / 4;
+    r.width = SCREEN_WIDTH / 2;
+    r.height = SCREEN_HEIGHT / 2;
+    KDFillRect(r, 0x00);
+  }
+}
+
+static int get_trig_input(char* input) {
+  int pos = 0;
+  const char* kTexts[] = {
+    "sine",
+    "cosine",
+    "tangent",
+    "cancel"
+  };
+  const char* kOutputs[] = {
+    "sin( )",
+    "cos( )",
+    "tan( )",
+  };
+  const KDPoint orig = KDPointMake(SCREEN_WIDTH / 4, SCREEN_HEIGHT / 4);
+  while (true) {
+    print_trig_menu();
+
+    uint16_t vert_acc = 0;
+    for (int i(0); i<4; i++) {
+      KDSize text_size = KDStringSize(kTexts[i]);
+      KDDrawString(kTexts[i],
+          KDPointMake(orig.x, orig.y + vert_acc + text_size.height / 2),
+          i==pos);
+      vert_acc += text_size.height;
+    }
+
+    ion_event_t event = ion_get_event();
+    if (event == UP_ARROW) {
+      pos--;
+      if (pos < 0) {
+        pos = 0;
+      }
+    } else if (event == DOWN_ARROW) {
+      pos++;
+      if (pos >= 4) {
+        pos = 3;
+      }
+    } else if (event == '=') {
+      clear_trig_menu();
+      if (pos == 3) {
+        return 0;
+      } else {
+        memcpy(input, kOutputs[pos], (size_t) strlen(kOutputs[pos]));
+        return strlen(kOutputs[pos]);
+      }
+    }
+  }
+}
+
 char* get_text() {
   char input[255] = {0};
   int index = 0;
@@ -60,10 +139,20 @@ char* get_text() {
       input[index++] = (char) event;
       // We are at the end of the line.
       if (index > max) {
-        max++;
+        max=index;
         input[max] = ' ';
         input[max+1] = '\0';
       }
+    } else if (event == TRIG_MENU) {
+      int tmp = get_trig_input(&input[index]);
+      index+=tmp;
+      if (index > max) {
+        max=index;
+        input[max] = ' ';
+        input[max+1] = '\0';
+      }
+      // we want to be inside the parenthese if there are some.
+      index -= (tmp > 2) ? 2 : 0;
     }
   }
   
diff --git a/ion/include/ion/events.h b/ion/include/ion/events.h
index 3758b742c..31a4b5545 100644
--- a/ion/include/ion/events.h
+++ b/ion/include/ion/events.h
@@ -75,7 +75,9 @@ typedef enum {
   LOWER_CASE_Z,
   LEFT_ARROW = 0x100, // events for things outside of ASCII.
   RIGHT_ARROW,
-  MENU_TRIG,
+  UP_ARROW,
+  DOWN_ARROW,
+  TRIG_MENU,
   ERROR = 0xffffffff,
 } ion_event_t;
 
diff --git a/ion/src/shared/events.c b/ion/src/shared/events.c
index b9c18c27f..4c088ea25 100644
--- a/ion/src/shared/events.c
+++ b/ion/src/shared/events.c
@@ -49,8 +49,8 @@ static ion_key_event_t ion_get_key_event() {
 // For now this is a bit silly but needed for instreface purpose.
 static const ion_event_t kEventForKeyDown[ION_NUMBER_OF_KEYS] = {
   UPPER_CASE_A, UPPER_CASE_B, UPPER_CASE_C, UPPER_CASE_D, UPPER_CASE_E,
-  UPPER_CASE_F, UPPER_CASE_G, UPPER_CASE_H, UPPER_CASE_I, UPPER_CASE_J,
-  UPPER_CASE_K, UPPER_CASE_L, UPPER_CASE_M, LEFT_ARROW, RIGHT_ARROW,
+  UPPER_CASE_F, UPPER_CASE_G, UPPER_CASE_H, UP_ARROW, DOWN_ARROW,
+  UPPER_CASE_K, UPPER_CASE_L, TRIG_MENU, LEFT_ARROW, RIGHT_ARROW,
   SEVEN, EIGHT, NINE, LEFT_PARENTHESIS, RIGHT_PARENTHESIS,
   FOUR, FIVE, SIX, PRODUCT, DIVISION,
   ONE, TWO, THREE, PLUS, MINUS,
diff --git a/ion/src/simulator/keyboard/fltkkbd.cpp b/ion/src/simulator/keyboard/fltkkbd.cpp
index e2148f555..1e8430718 100644
--- a/ion/src/simulator/keyboard/fltkkbd.cpp
+++ b/ion/src/simulator/keyboard/fltkkbd.cpp
@@ -6,8 +6,8 @@
 
 static const char* kCharForKey[KEYBOARD_ROWS * KEYBOARD_COLUMNS] = {
   "A", "B", "C", "D", "E",
-  "F", "G", "H", "I", "J",
-  "K", "L", "M", "LEFT", "RIGHT",
+  "F", "G", "H", "UP", "DOWN",
+  "K", "L", "TRIG", "LEFT", "RIGHT",
   "7", "8", "9", "(", ")",
   "4", "5", "6", "*", "/",
   "1", "2", "3", "+", "-",
diff --git a/kandinsky/include/kandinsky/text.h b/kandinsky/include/kandinsky/text.h
index 955fc0755..6284ca35b 100644
--- a/kandinsky/include/kandinsky/text.h
+++ b/kandinsky/include/kandinsky/text.h
@@ -5,6 +5,6 @@
 
 void KDDrawChar(char character, KDPoint p, uint8_t inverse);
 void KDDrawString(const char * text, KDPoint p, uint8_t inverse);
-KDSize KDStringSize(char * text);
+KDSize KDStringSize(const char * text);
 
 #endif
diff --git a/kandinsky/src/text.c b/kandinsky/src/text.c
index 9520b0890..f00934b61 100644
--- a/kandinsky/src/text.c
+++ b/kandinsky/src/text.c
@@ -23,7 +23,7 @@ void KDDrawString(const char * text, KDPoint p, uint8_t inverse) {
   }
 }
 
-KDSize KDStringSize(char * text) {
+KDSize KDStringSize(const char * text) {
   return (KDSize){
     .width = strlen(text)*BITMAP_FONT_CHARACTER_WIDTH,
     .height = BITMAP_FONT_CHARACTER_HEIGHT