Update 'CARDPUTER CircuitPython/projects/text_editor.py'

almost a fully functional text editor aside from no line scrolling - can save files and open them. no error handling has been set for folders, i assume they will break the program ;P

CARDPUTER CircuitPython/projects/text_editor.py

@@ -1,12 +1,18 @@
 # GUIDE
 # type freely! CTRL+D clears the text.
+# CTRL + S to Save
+# CTRL + O to Open
+# DESIGNED TO WORK WITH SD CARD !!! 
 # backspace, space, and return function as expected.
-# keys not recognised WILL print "UNKNOWN 0x??", but this is useful for extra key scans
-#
-# WORK IN PROGRESS
-# CTRL + S to save text to the SD Card
-# CTRL + O to open a text file
-# UP and DOWN scrolling - (use cursor )
+
+# keys not recognised WILL print "UNKNOWN 0x??",
+# unless PRINT_UNKNOWN_KEYS is set to False
+# UP, DOWN, LEFT, RIGHT will print,
+# unless PRINT_COMMAND_KEYS is set to False
+
+# TODO:
+# UP and DOWN scrolling
+# look into folders in SD card
 ######
 
 import board
@@ -19,6 +25,17 @@ import sdcardio
 import storage
 import os
 
+def file_menu():
+    files_text = ""
+    index = 0
+    for file in os.listdir("/sd"):
+        filename = str(file)
+        if index == open_cursor:
+            filename = "> " + filename
+        files_text = files_text + filename+"\n"
+        index += 1
+    files_group.text = files_text
+
 ## SD Card set up for saving text to SD card
 spi = busio.SPI(board.SD_SCK, MOSI=board.SD_MOSI, MISO=board.SD_MISO)
 cs = board.SD_CS
@@ -36,6 +53,10 @@ except OSError:
 
 keyb = Keyboard()
 
+PRINT_UNKNOWN_KEYS = False
+PRINT_COMMAND_KEYS = False
+COMMAND_KEYS = ["UP", "DOWN", "LEFT", "RIGHT"]
+
 page = "editor"
 
 intro_text = "Press CTRL+D to clear text\n"+SD_status+"\n\n"
@@ -75,7 +96,7 @@ open_cursor = 0
 
 while True:
     key = keyb.scan()
-    
+
     if key == "BACKSP":
         if page == "editor":
             text = text[:-1]
@@ -100,15 +121,7 @@ while True:
     elif key == "CTRLO":
         board.DISPLAY.root_group = open_group
         page="open"
-        files_text = ""
-        index = 0
-        for file in os.listdir("/sd"):
-            filename = str(file)
-            if index == open_cursor:
-                filename = "> " + filename
-            files_text = files_text + filename+"\n"
-            index += 1
-        files_group.text = files_text
+        file_menu()
         
     elif key == "ESC":
         if page == "editor":
@@ -121,15 +134,20 @@ while True:
     else:
         ## The actual editor
         if page == "editor":
-            ## WRAPPING
-            ## calculate wrapping when entering a character 
-            lines = text.split("\n")
-            current_line = lines[len(lines)-1]
-            if len(current_line) > 35:
-                text=text+"\n" # <- start a new line here
-            ##############################################
-            text = text+key
-            text_area.text = text
+            if "UNKNOWN" in key and PRINT_UNKNOWN_KEYS == False:
+                pass
+            elif key in COMMAND_KEYS and PRINT_COMMAND_KEYS == False:
+                pass
+            else:
+                ## WRAPPING
+                ## calculate wrapping when entering a character 
+                lines = text.split("\n")
+                current_line = lines[len(lines)-1]
+                if len(current_line) > 35:
+                    text=text+"\n" # <- start a new line here
+                ##############################################
+                text = text+key
+                text_area.text = text
 
         ## The save file menu - for typing the filename
         elif page == "save":
@@ -150,4 +168,27 @@ while True:
 
         ## The open file menu - for selecting a file
         elif page == "open":
-            pass
+            if key == "UP":
+                if open_cursor == 0:
+                    pass
+                else:
+                    open_cursor -= 1
+                    file_menu()
+            elif key == "DOWN":
+                if open_cursor == len(os.listdir("/sd"))-1:
+                    pass
+                else:
+                    open_cursor += 1
+                    file_menu()
+            elif key == "\n":
+                text = ""
+                fn = os.listdir("/sd")[open_cursor]
+                with open("/sd/"+fn, "r") as f:
+                    lines = f.readlines()
+                for line in lines:
+                    text = text + line
+                text_area.text = text
+                filename_text = fn
+                filename_group.text=filename_text
+                page = "editor"
+                board.DISPLAY.root_group = intro_text_area