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134 lines
4.3 KiB
Python
134 lines
4.3 KiB
Python
"""Touch keyboard."""
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class TouchKeyboard(object):
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"""Touchscreen keyboard for ILI9341."""
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YELLOW = const(65504)
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GREEN = const(2016)
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KEYS = (
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(
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('q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p'),
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('a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l'),
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('\t', 'z', 'x', 'c', 'v', 'b', 'n', 'm', '\b', '\b'),
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('\n', ' ', '\r')
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),
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(
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('Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P'),
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('A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L'),
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('\t', 'Z', 'X', 'C', 'V', 'B', 'N', 'M', '\b', '\b'),
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('\n', ' ', '\r')
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),
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(
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('1', '2', '3', '4', '5', '6', '7', '8', '9', '0'),
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('@', '#', '$', '%', '^', '&', '*', '(', ')'),
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('\f', '+', ',', '.', '-', '_', '!', '?', '\b', '\b'),
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('\a', ' ', '\r')
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),
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(
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('1', '2', '3', '4', '5', '6', '7', '8', '9', '0'),
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('<', '>', '|', '\\', '/', '{', '}', '[', ']'),
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('\f', '=', '"', '\'', ';', ':', '`', '~', '\b', '\b'),
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('\a', ' ', '\r')
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)
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)
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def __init__(self, display, font):
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"""Initialize Keybaord.
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Args:
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display (Display class): LCD Display
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font (XglcdFont class): Font to display text above keyboard
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"""
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self.display = display
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self.font = font
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self.kb_screen = 0
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self.kb_text = ''
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self.load_keyboard()
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self.waiting = False
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self.locked = False
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def clear_text(self):
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"""Clear the keyboard text."""
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self.display.fill_hrect(0, 11, self.display.width, 24, 0)
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self.kb_text = ''
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def handle_keypress(self, x, y, debug=False):
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"""Get pressed key.
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Args:
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x, y (int): Pressed screen coordinates.
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Returns:
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bool: True indicates return pressed otherwise False
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"""
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if self.locked is True:
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return
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if self.waiting is True:
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self.clear_text()
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self.waiting = False
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return
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x, y = y, x # Touch coordinates need to be swapped.
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if debug:
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self.display.fill_circle(x, y, 5, self.GREEN)
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# Calculate keyboard row and column
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if y >= 47: # Check if press within keyboard area
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row = int(y / 47) - 1
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if row == 0:
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column = int(x/32)
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elif row == 1 or row == 2:
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column = max(0, int((x-16)/32))
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else:
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# Row 3
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if x < 80:
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column = 0
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elif x > 240:
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column = 2
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else:
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column = 1
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key = self.KEYS[self.kb_screen][row][column]
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if key == '\t':
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self.kb_screen ^= 1 # Toggle caps
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self.load_keyboard()
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elif key == '\f':
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self.kb_screen = self.kb_screen - 2 ^ 1 + 2 # Toggle symbols
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self.load_keyboard()
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elif key == '\a':
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self.kb_screen = 0 # Letters
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self.load_keyboard()
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elif key == '\n':
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self.kb_screen = 2 # Numbers & symbols
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self.load_keyboard()
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elif key == '\b': # Backspace
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self.kb_text = self.kb_text[:-1]
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margin = self.font.measure_text(self.kb_text)
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self.display.fill_vrect(margin, 11, 12, 24, 0)
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elif key == '\r':
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# Keyboard return pressed
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if self.kb_text != '':
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return True
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else:
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margin = self.font.measure_text(self.kb_text)
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self.kb_text += key
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self.display.draw_letter(margin, 11, key, self.font,
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self.YELLOW)
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return False
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def load_keyboard(self):
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"""Display the currently selected keyboard."""
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self.display.draw_image('images/kb{0}.raw'.format(self.kb_screen),
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0, 47, 320, 192)
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def show_message(self, msg, color):
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"""Display message above keyboard."""
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self.clear_text()
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msg_length = self.font.measure_text(msg)
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margin = (self.display.width - msg_length) // 2
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self.display.draw_text(margin, 11, msg, self.font, color)
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