Device dependent margins/config

src/labelle/cli/cli.py

@@ -18,7 +18,6 @@
 from labelle.lib.constants import (
     DEFAULT_BARCODE_TYPE,
     DEFAULT_MARGIN_PX,
-    PIXELS_PER_MM,
     USE_QR,
     BarcodeType,
     Direction,
@@ -54,12 +53,12 @@
 LOG = logging.getLogger(__name__)
 
 
-def mm_to_payload_px(mm: float, margin: float) -> float:
+def mm_to_payload_px(labeler: DymoLabeler, mm: float, margin: float) -> float:
     """Convert a length in mm to a number of pixels of payload.
 
-    The print resolution is 7 pixels/mm, and margin is subtracted from each side.
+    Margin is subtracted from each side.
     """
-    return max(0, (mm * PIXELS_PER_MM) - margin * 2)
+    return max(0, (mm * labeler.pixels_per_mm) - margin * 2)
 
 
 def version_callback(value: bool) -> None:
@@ -503,13 +502,6 @@ def default(
         min_label_mm_len = fixed_length
         max_label_mm_len = fixed_length
 
-    min_payload_len_px = mm_to_payload_px(min_label_mm_len, margin_px)
-    max_payload_len_px = (
-        mm_to_payload_px(max_label_mm_len, margin_px)
-        if max_label_mm_len is not None
-        else None
-    )
-
     if output == Output.PRINTER:
         device_manager = get_device_manager()
         device = device_manager.find_and_select_device(patterns=device_pattern)
@@ -518,13 +510,21 @@ def default(
         device = None
 
     dymo_labeler = DymoLabeler(tape_size_mm=tape_size_mm, device=device)
+
+    min_payload_len_px = mm_to_payload_px(dymo_labeler, min_label_mm_len, margin_px)
+    max_payload_len_px = (
+        mm_to_payload_px(dymo_labeler, max_label_mm_len, margin_px)
+        if max_label_mm_len is not None
+        else None
+    )
+
     if not render_engines:
         raise typer.BadParameter("No elements to print")
     render_engine = HorizontallyCombinedRenderEngine(render_engines)
     render_context = RenderContext(
         background_color="white",
         foreground_color="black",
-        height_px=dymo_labeler.height_px,
+        height_px=dymo_labeler.label_height_px,
         preview_show_margins=False,
     )
 
@@ -544,6 +544,7 @@ def default(
     else:
         render = PrintPreviewRenderEngine(
             render_engine=render_engine,
+            dymo_labeler=dymo_labeler,
             justify=justify,
             visible_horizontal_margin_px=margin_px,
             labeler_margin_px=dymo_labeler.labeler_margin_px,

src/labelle/gui/gui.py

@@ -63,7 +63,7 @@ def _init_elements(self) -> None:
         self._device_manager = DeviceManager()
         self._dymo_labeler = DymoLabeler()
         self._settings_toolbar.update_labeler_context(
-            supported_tape_sizes=self._dymo_labeler.SUPPORTED_TAPE_SIZES_MM,
+            supported_tape_sizes=self._dymo_labeler.device_config.supported_tape_sizes_mm,
             installed_tape_size=self._dymo_labeler.tape_size_mm,
             minimum_horizontal_margin_mm=self._dymo_labeler.minimum_horizontal_margin_mm,
         )
@@ -105,7 +105,7 @@ def _on_settings_changed(self, settings: Settings) -> None:
         self._render_context = RenderContext(
             foreground_color=settings.foreground_color,
             background_color=settings.background_color,
-            height_px=self._dymo_labeler.height_px,
+            height_px=self._dymo_labeler.label_height_px,
             preview_show_margins=settings.preview_show_margins,
         )
         self._label_list.update_params(

src/labelle/gui/q_labels_list.py

@@ -27,7 +27,6 @@
     RenderEngine,
     RenderEngineException,
 )
-from labelle.lib.utils import mm_to_px
 
 LOG = logging.getLogger(__name__)
 
@@ -159,11 +158,12 @@ def render_preview(self) -> None:
         assert self.render_context is not None
         render_engine = PrintPreviewRenderEngine(
             render_engine=self._payload_render_engine,
+            dymo_labeler=self.dymo_labeler,
             justify=self.justify,
-            visible_horizontal_margin_px=mm_to_px(self.h_margin_mm),
+            visible_horizontal_margin_px=self.dymo_labeler.mm_to_px(self.h_margin_mm),
             labeler_margin_px=self.dymo_labeler.labeler_margin_px,
             max_width_px=None,
-            min_width_px=mm_to_px(self.min_label_width_mm),
+            min_width_px=self.dymo_labeler.mm_to_px(self.min_label_width_mm),
         )
         try:
             bitmap = render_engine.render(self.render_context)
@@ -179,10 +179,10 @@ def render_print(self) -> None:
         render_engine = PrintPayloadRenderEngine(
             render_engine=self._payload_render_engine,
             justify=self.justify,
-            visible_horizontal_margin_px=mm_to_px(self.h_margin_mm),
+            visible_horizontal_margin_px=self.dymo_labeler.mm_to_px(self.h_margin_mm),
             labeler_margin_px=self.dymo_labeler.labeler_margin_px,
             max_width_px=None,
-            min_width_px=mm_to_px(self.min_label_width_mm),
+            min_width_px=self.dymo_labeler.mm_to_px(self.min_label_width_mm),
         )
         try:
             bitmap, _ = render_engine.render_with_meta(self.render_context)

src/labelle/gui/q_settings_toolbar.py

@@ -57,7 +57,7 @@ def _init_elements(self) -> None:
 
     def update_labeler_context(
         self,
-        supported_tape_sizes: tuple[int, ...],
+        supported_tape_sizes: list[int],
         installed_tape_size: int,
         minimum_horizontal_margin_mm: float,
     ) -> None:

src/labelle/lib/constants.py

@@ -18,6 +18,7 @@
 
 import labelle.resources.fonts
 import labelle.resources.icons
+from labelle.lib.devices.device_config import DeviceConfig
 
 try:
     from pyqrcode import QRCode
@@ -34,19 +35,92 @@
     "WARNING: This device is not confirmed to work with this software. Please "
     "report your experiences in https://github.com/labelle-org/labelle/issues/4"
 )
-SUPPORTED_PRODUCTS = {
-    0x0011: "DYMO LabelMANAGER PC",
-    0x0015: "LabelPoint 350",
-    0x1001: "LabelManager PnP (no mode switch)",
-    0x1002: "LabelManager PnP (mode switch)",
-    0x1003: f"LabelManager 420P (no mode switch) {UNCONFIRMED_MESSAGE}",
-    0x1004: f"LabelManager 420P (mode switch) {UNCONFIRMED_MESSAGE}",
-    0x1005: "LabelManager 280 (no mode switch)",
-    0x1006: "LabelManager 280 (no mode switch)",
-    0x1007: f"LabelManager Wireless PnP (no mode switch) {UNCONFIRMED_MESSAGE}",
-    0x1008: f"LabelManager Wireless PnP (mode switch) {UNCONFIRMED_MESSAGE}",
-    0x1009: f"MobileLabeler {UNCONFIRMED_MESSAGE}",
-}
+
+# ---- Supported USB Devices configuration ----
+SUPPORTED_PRODUCTS = [
+    DeviceConfig(
+        name="DYMO LabelMANAGER PC",
+        device_ids=[0x0011],
+        # ToDo: Validate config!
+        # Printhead 128 Pixels, distributed over 18mm of active area
+        print_head_px=128,
+        print_head_mm=18,
+        supported_tape_sizes_mm=[6, 9, 12, 19],
+    ),
+    DeviceConfig(
+        name="LabelPoint 350",
+        device_ids=[0x0015],
+        # ToDo: Validate config!
+        # Printhead 64 Pixels, distributed over 9mm of active area
+        print_head_px=64,
+        print_head_mm=9,
+        supported_tape_sizes_mm=[6, 9, 12],
+    ),
+    DeviceConfig(
+        name="DYMO LabelMANAGER PC II",
+        device_ids=[0x001C],
+        # Printhead 128 Pixels, distributed over 18mm of active area
+        print_head_px=128,
+        print_head_mm=18,
+        supported_tape_sizes_mm=[6, 9, 12, 19, 24],
+    ),
+    DeviceConfig(
+        name="LabelManager PnP",
+        device_ids=[0x1001, 0x1002],
+        # Printhead 64 Pixels, distributed over 9mm of active area
+        print_head_px=64,
+        print_head_mm=9,
+        supported_tape_sizes_mm=[6, 9, 12],
+    ),
+    DeviceConfig(
+        name=f"LabelManager 420P {UNCONFIRMED_MESSAGE}",
+        device_ids=[0x1003, 0x1004],
+        # ToDo: Validate config!
+        # Printhead 64 Pixels, distributed over 9mm of active area
+        print_head_px=64,
+        print_head_mm=9,
+        supported_tape_sizes_mm=[6, 9, 12],
+    ),
+    DeviceConfig(
+        name="LabelManager 280",
+        device_ids=[0x1006, 0x1005],
+        # ToDo: Validate config!
+        # Printhead 64 Pixels, distributed over 9mm of active area
+        print_head_px=64,
+        print_head_mm=9,
+        supported_tape_sizes_mm=[6, 9, 12],
+    ),
+    DeviceConfig(
+        name=f"LabelManager Wireless PnP {UNCONFIRMED_MESSAGE}",
+        device_ids=[0x1007, 0x1008],
+        # ToDo: Validate config!
+        # Printhead 64 Pixels, distributed over 9mm of active area
+        print_head_px=64,
+        print_head_mm=9,
+        supported_tape_sizes_mm=[6, 9, 12],
+    ),
+    DeviceConfig(
+        name=f"MobileLabeler {UNCONFIRMED_MESSAGE}",
+        device_ids=[0x1009],
+        # ToDo: Validate config!
+        # Printhead 64 Pixels, distributed over 9mm of active area
+        print_head_px=64,
+        print_head_mm=9,
+        supported_tape_sizes_mm=[6, 9, 12],
+    ),
+]
+
+# Simulator configuration
+SIMULATOR_CONFIG = DeviceConfig(
+    name="Simulator",
+    device_ids=[0],
+    # Fake printhead 128 Pixels, distributed over 18mm of active area
+    print_head_px=128,
+    print_head_mm=18,
+    supported_tape_sizes_mm=[6, 9, 12, 19, 24],
+)
+
+
 DEV_VENDOR = 0x0922
 
 PRINTER_INTERFACE_CLASS = 0x07
@@ -63,10 +137,6 @@
 DEFAULT_MARGIN_PX = 56
 VERTICAL_PREVIEW_MARGIN_PX = 13
 
-DPI = 180
-MM_PER_INCH = 25.4
-PIXELS_PER_MM = DPI / MM_PER_INCH
-
 ICON_DIR = Path(labelle.resources.icons.__file__).parent
 
 

src/labelle/lib/devices/device_config.py

@@ -0,0 +1,44 @@
+from __future__ import annotations
+
+import logging
+from dataclasses import dataclass
+
+LOG = logging.getLogger(__name__)
+
+
+@dataclass
+class DeviceConfig:
+    """Configuration object for the capabilities of a label printer."""
+
+    name: str
+    """Name of this device"""
+
+    device_ids: list[int]
+    """List of USB Device ID's this device can identify as"""
+
+    print_head_px: int
+    """Size of the print head in pixels (use calibration routine to determine)"""
+
+    print_head_mm: float
+    """Size of the active area of the print head in millimters
+        (use calibration routine to determine)"""
+
+    supported_tape_sizes_mm: list[int]
+    """List of supported tape sizes in mm"""
+
+    tape_alignment_inaccuracy_mm: float = 1.0
+    """The inaccuracy of the tape position relative to the printhead
+
+    Inaccuracy of the tape position is mostly caused by
+    the tape moving slightly from side to side in the cartridge.
+    Improper cartrigde placemement is also an factor,
+    but negligible due to a physical spring in the lid.
+    """
+
+    LABELER_DISTANCE_BETWEEN_PRINT_HEAD_AND_CUTTER_MM: float = 8.1
+    """This is the distance between the printhead and the cutter (knife).
+    """
+
+    def matches_device_id(self, device_id: int) -> bool:
+        """Check if the a device ID matches this config."""
+        return device_id in self.device_ids

src/labelle/lib/devices/device_manager.py

@@ -8,6 +8,7 @@
     SUPPORTED_PRODUCTS,
     UNCONFIRMED_MESSAGE,
 )
+from labelle.lib.devices.device_config import DeviceConfig
 from labelle.lib.devices.usb_device import UsbDevice
 
 LOG = logging.getLogger(__name__)
@@ -80,8 +81,23 @@ def find_and_select_device(self, patterns: list[str] | None = None) -> UsbDevice
             LOG.debug(dev.device_info)
         dev = devices[0]
         if dev.is_supported:
-            msg = f"Recognized device as {SUPPORTED_PRODUCTS[dev.id_product]}"
+            msg = f"Recognized device as {get_device_config_by_id(dev.id_product).name}"
         else:
             msg = f"Unrecognized device: {hex(dev.id_product)}. {UNCONFIRMED_MESSAGE}"
         LOG.debug(msg)
         return dev
+
+
+def get_device_config_by_id(product_id: int) -> DeviceConfig:
+    """Get a labeler device config with USB ID.
+
+    :param idValue: USB ID value
+    :return: Device config, None if not found
+    """
+    #
+    for device in SUPPORTED_PRODUCTS:
+        if device.matches_device_id(product_id):
+            return device
+
+    # No device config found
+    raise ValueError(f"Unsupported device type product id: {hex(product_id)}")