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Clear screen are when changing page, added a demo.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,163 @@ | ||
| import serial | ||
|
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| class MySerial(serial.Serial): | ||
| def write(self, what): | ||
| print(what.rstrip()) | ||
| serial.Serial.write(self, what) | ||
|
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| class App(object): | ||
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| def __init__(self, port): | ||
| self._port = port | ||
| self._page_stack = [] | ||
| self._p = None | ||
| self._lp = None | ||
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| def run(self): | ||
| # Connect and display initial messages | ||
| s = self._s = MySerial(self._port, 9600, timeout=None) | ||
| self.dump(5) | ||
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| # Run the loop | ||
| while self._p: | ||
| if self._p != self._lp: | ||
| self._p.display() | ||
| self._lp = self._p | ||
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| line = s.readline().rstrip() | ||
| try: | ||
| value = int(line) | ||
| self._p.on_button(value) | ||
| except ValueError: | ||
| print(line.rstrip()) | ||
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| def push_page(self, page): | ||
| self._page_stack.append(page) | ||
| self._p = page | ||
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| def pop_page(self, n=1): | ||
| self._page_stack = self._page_stack[:-n] | ||
| if self._page_stack: | ||
| self._p = self._page_stack[-1] | ||
| else: | ||
| self._p = None | ||
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| def change_page(self, page): | ||
| p = self._page_stack.pop() | ||
| self._page_stack.append(page) | ||
| self._p = page | ||
| return p | ||
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||
| def dump(self, timeout=0.1): | ||
| s = self._s | ||
| s.timeout = timeout | ||
| line = s.readline() | ||
| while(line): | ||
| print(line.rstrip()) | ||
| line = s.readline() | ||
|
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| s.timeout = None | ||
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| @classmethod | ||
| def execute(cls, pgcls, port): | ||
| app = cls(port) | ||
| page = pgcls(app) | ||
| app.push_page(page) | ||
| app.run() | ||
|
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| class Page(object): | ||
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| def __init__(self, app): | ||
| self._a = app | ||
| self._buttons = [] | ||
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| self.add_buttons() | ||
|
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| def add_buttons(self): | ||
| pass | ||
|
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| def display(self): | ||
| ## Redraw the page | ||
| s = self._a._s | ||
|
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| s.write("freeze\n") | ||
| s.readline() | ||
| s.write("clearbuttons\n".encode("utf8")) | ||
| s.readline() | ||
| for i, b in enumerate(self._buttons): | ||
| s.write("addbutton {0}{1}{2}{3}\n".format(b.x, b.y, b.w, b.h).encode("utf8")) | ||
| s.readline() | ||
| self.set_image(i, b.filename) | ||
| s.write("unfreeze\n".encode("utf8")) | ||
| s.readline() | ||
| self._a.dump() | ||
|
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| def add_button(self, x, y, w, h, filename="", callback=None): | ||
| self._buttons.append(Button(x, y, w, h, filename, callback)) | ||
| self._buttons[-1].index = len(self._buttons) - 1 | ||
|
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| def set_image(self, i, filename): | ||
| s = self._a._s | ||
|
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| b = self._buttons[i] | ||
| b.filename = filename | ||
| s.write("button{} {}\n".format(i + 1, b.filename).encode("utf8")) | ||
| s.readline() | ||
|
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| def on_button(self, i): | ||
| i = i - 1 | ||
| if i >= 0 and i < len(self._buttons): | ||
| cb = self._buttons[i].callback | ||
| if cb: | ||
| cb(self._a, self._buttons[i]) | ||
|
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| class Button(object): | ||
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| def __init__(self, x, y, w=1, h=1, filename="", callback=None): | ||
| self.x = x | ||
| self.y = y | ||
| self.w = w | ||
| self.h = h | ||
| self.filename = filename | ||
| self.callback = callback | ||
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| class MyStartPage(Page): | ||
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| def add_buttons(self): | ||
| self.add_button(1, 1, 2, 2, "0001", self._button1) | ||
| self.add_button(1, 3, 2, 2, "0002", self._button2) | ||
|
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| def _button1(self, app, button): | ||
| self.set_image(button.index, "0001") | ||
| p = MyExitPage(self._a) | ||
| p._orig = self._a.change_page(p) | ||
|
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| def _button2(self, app, button): | ||
| self.set_image(button.index, "0004") | ||
|
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| p = OtherPage(self._a) | ||
| self._a.push_page(p) | ||
|
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| class MyExitPage(Page): | ||
| def add_buttons(self): | ||
| self.add_button(1, 1, 2, 2, "0001", self._yes) | ||
| self.add_button(4, 1, 2, 2, "0002", self._no) | ||
|
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| def _yes(self, app, button): | ||
| self._a.pop_page() | ||
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| def _no(self, app, button): | ||
| self._a.change_page(self._orig) | ||
|
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| class OtherPage(Page): | ||
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| def add_buttons(self): | ||
| self.add_button(1, 1, 5, 1, "0009", self._button1) | ||
|
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| def _button1(self, app, button): | ||
| app.pop_page() | ||
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| App.execute(MyStartPage, "/dev/ttyACM0") | ||
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