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Pico_ePaper_Code/pythonNanoGui/gui/widgets/label.py

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+# label.py Label class for nano-gui
+
+# Released under the MIT License (MIT). See LICENSE.
+# Copyright (c) 2018-2020 Peter Hinch
+
+from gui.core.nanogui import DObject
+from gui.core.writer import Writer
+
+# text: str display string int save width
+class Label(DObject):
+    def __init__(self, writer, row, col, text, invert=False, fgcolor=None, bgcolor=None, bdcolor=False):
+        # Determine width of object
+        if isinstance(text, int):
+            width = text
+            text = None
+        else:
+            width = writer.stringlen(text)
+        height = writer.height
+        super().__init__(writer, row, col, height, width, fgcolor, bgcolor, bdcolor)
+        if text is not None:
+            self.value(text, invert)
+
+    def value(self, text=None, invert=False, fgcolor=None, bgcolor=None, bdcolor=None):
+        txt = super().value(text)
+        # Redraw even if no text supplied: colors may have changed.
+        self.invert = invert
+        self.fgcolor = self.def_fgcolor if fgcolor is None else fgcolor
+        self.bgcolor = self.def_bgcolor if bgcolor is None else bgcolor
+        if bdcolor is False:
+            self.def_bdcolor = False
+        self.bdcolor = self.def_bdcolor if bdcolor is None else bdcolor
+        self.show()
+        return txt
+
+    def show(self):
+        txt = super().value()
+        if txt is None:  # No content to draw. Future use.
+            return
+        super().show()  # Draw or erase border
+        wri = self.writer
+        dev = self.device
+        Writer.set_textpos(dev, self.row, self.col)
+        wri.setcolor(self.fgcolor, self.bgcolor)
+        wri.printstring(txt, self.invert)
+        wri.setcolor()  # Restore defaults