70 lines
2.6 KiB
Python
70 lines
2.6 KiB
Python
"""
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WelcomeScreen: A simple library providing a customizable welcome screen fading over an LCD
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Copyright (C) 2024 Benjamin Burkhardt
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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"""
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import time
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class WelcomeScreen:
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def __init__(self, lcd):
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self.lcd = lcd
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self.columns = self.lcd.num_columns
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self.lines = self.lcd.num_lines
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def show(self, cycles=1): # loops says how often the Starting text goes through
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if cycles < 1: cycles = 1
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padding = " " * self.columns # as much spaces as padding as one display line is long
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padding_hyphen = "-" * self.columns # as much hyphens as padding as one display line is long
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starting_str = "Starting..."
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started_str = "Started!".center(self.columns)
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# mechanism for centering on a 4*20 display
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y_offset = 0
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if self.lines == 4:
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y_offset = 1
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# also clear the top and bottom with ----
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self.lcd.move_to(0,0)
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self.lcd.putstr(padding_hyphen)
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self.lcd.move_to(0,4)
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self.lcd.putstr(padding_hyphen)
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for i in range(cycles):
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line1 = padding + starting_str + padding
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line2 = "The Program!".center(self.columns)
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for i in range(self.columns + len(starting_str)):
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self.lcd.move_to(0,y_offset)
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self.lcd.putstr(line1[0:self.columns])
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self.lcd.move_to(0,y_offset+1)
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self.lcd.putstr(line2[0:self.columns])
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line1 = line1[1:]
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self.lcd.move_to(0,y_offset)
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self.lcd.putstr(started_str)
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# now fade down
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if self.lines == 4:
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current_display = padding_hyphen + started_str + "The Program!".center(self.columns) + padding_hyphen
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else:
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current_display = started_str + "The Program!".center(self.columns)
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time.sleep(1)
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self.lcd.move_to(0,y_offset)
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self.lcd.putstr(padding + started_str)
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time.sleep(0.1)
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self.lcd.clear()
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time.sleep(0.3)
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