Diff: LCDText.cpp

Revision:

0:9fd64882c5aa

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/LCDText.cpp	Tue Dec 10 02:17:48 2013 +0000
@@ -0,0 +1,56 @@
+#include "LCDText.h"
+
+void clearLCD() {
+    char buff[33];
+    memset(buff, ' ', 32);
+    buff[32] = '\0';
+    mylcd.printf(buff);
+}
+
+//clears LCD and prints the two strings centered on each line
+//max length of each string is 16
+void printLCD(const char* string1, const char* string2) {
+    char buff[33];
+    memset(buff, ' ', 32);
+    buff[32] = '\0';
+    //clear LCD
+    clearLCD();
+    
+    //print to LCD
+    if(string1) {
+        memcpy(buff+(16-strlen(string1))/2, string1, strlen(string1));
+    }
+    if(string2) {
+        memcpy(buff+16+(16-strlen(string2))/2, string2, strlen(string2));
+    }
+    mylcd.printf(buff);
+}
+
+//creates a menu with with a title, controlled by the up/down/select buttons
+//returns index of option selected
+int displayMenu(const char* menuTitle, const char** menuOptions, int numOptions) {
+    int curSelection = 0;
+    
+    printLCD(menuTitle, menuOptions[curSelection]);
+    if(!up || !down || !select || !back) wait(.3);
+    while(1) {
+        if(!up) {
+            curSelection = (curSelection == numOptions-1) ? 0 : (curSelection + 1);
+            printLCD(menuTitle, menuOptions[curSelection]);
+            if(!up) wait(.2);
+        }
+        if(!down) {
+            curSelection = (curSelection == 0) ? (numOptions - 1) : (curSelection - 1);
+            printLCD(menuTitle, menuOptions[curSelection]);
+            if(!down) wait(.2);
+        }
+        if(!select) {
+            clearLCD();
+            return curSelection;
+        }
+        if(!back) {
+            clearLCD();
+            return -1;
+        }
+    }
+}