Files
kicad-zone-resistance/fill_resistance/dialog.py
T
janik 56e2f9c81a Include the net's traces as conductors alongside zone fills
Straight tracks become capsule outline polygons (rectangle +
semicircular caps), arc tracks annular bands with end caps, both
tessellated to the same sagitta tolerance as zone-fill arcs; they merge
into the per-layer copper next to the fills, so rasterization, via
stitching, the solver and the plots handle them unchanged. Trace-only
layers and trace-only nets now qualify as candidates. Dialog checkbox
(on by default, INCLUDE_TRACKS) toggles them per run.

Hole-less polygons (every track outline) now paint the layer mask
directly instead of allocating a full-frame temporary each.

Tests: exact N-cell chain on a rasterized capsule, analytic annular-
sector convergence for an arc trace, capsule/arc-band outline geometry
invariants, collinear-arc degradation, and fill+trace union solve.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
2026-07-15 15:37:51 +07:00

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"""Qt selection dialog shown on plugin launch: net, layers, per-electrode
contact, test current, optional cell size. PySide6 is already a plugin
dependency (matplotlib QtAgg backend); the QApplication created here is
reused by matplotlib afterwards.
"""
from __future__ import annotations
from dataclasses import dataclass
from PySide6.QtCore import Qt
from PySide6.QtWidgets import (QApplication, QCheckBox, QComboBox, QDialog,
QDialogButtonBox, QFormLayout, QLabel,
QLineEdit, QListWidget, QListWidgetItem,
QVBoxLayout)
from . import config, skin
ALL_LAYERS = "All selected layers"
AUTO_CONTACT = "(auto: per contact part)"
MODEL_LABELS = {
"uniform": "Uniform injection (conductor pressed on top)",
"equipotential": "Equipotential (ideal bonded lug)",
}
@dataclass
class Selection:
net: str
layers: list[str]
contact1: str # "auto", "all" or layer name
contact2: str
current_a: float
cell_um: float | None
freq_hz: float = 0.0
contact_model: str = "uniform"
include_buildup: bool = False
extra_cu_um: float = 0.0
include_tracks: bool = True
class _Dialog(QDialog):
def __init__(self, candidates: dict[str, list[str]], layer_order: list[str],
default_net: str, e1_label: str, e2_label: str,
contact1: str, contact2: str, buildup_layers: list[str]):
super().__init__()
self.setWindowTitle("Fill Resistance")
self.setWindowFlag(Qt.WindowStaysOnTopHint, True)
self._candidates = candidates
self._layer_order = layer_order
form = QFormLayout()
self.net_box = QComboBox()
for net in sorted(candidates):
self.net_box.addItem(net)
self.net_box.setCurrentText(default_net)
form.addRow("Signal (net):", self.net_box)
self.layer_list = QListWidget()
self.layer_list.setMaximumHeight(120)
form.addRow("Layers:", self.layer_list)
self.tracks_check = QCheckBox("include the net's traces "
"(tracks + arcs)")
self.tracks_check.setChecked(config.INCLUDE_TRACKS)
form.addRow("Conductors:", self.tracks_check)
self.contact1_box = QComboBox()
self.contact2_box = QComboBox()
form.addRow(f"V+ ({e1_label}):", self.contact1_box)
form.addRow(f"V ({e2_label}):", self.contact2_box)
self.model_box = QComboBox()
for key in ("uniform", "equipotential"):
self.model_box.addItem(MODEL_LABELS[key], key)
default_index = 0 if config.CONTACT_MODEL == "uniform" else 1
self.model_box.setCurrentIndex(default_index)
form.addRow("Contact model:", self.model_box)
self.current_edit = QLineEdit(f"{config.TEST_CURRENT_A:g}")
form.addRow("Test current [A]:", self.current_edit)
self.freq_edit = QLineEdit("")
self.freq_edit.setPlaceholderText("0 = DC (e.g. 142k, 1.5M)")
form.addRow("Frequency [Hz]:", self.freq_edit)
self.cell_edit = QLineEdit("")
self.cell_edit.setPlaceholderText("auto")
form.addRow("Cell size [µm]:", self.cell_edit)
self.buildup_check = QCheckBox(
f"{config.SOLDER_THICKNESS_UM:g} µm solder on mask openings"
+ (f" ({', '.join(buildup_layers)})" if buildup_layers
else " (none found)"))
self.buildup_check.setChecked(bool(buildup_layers)
and config.INCLUDE_MASK_BUILDUP)
self.buildup_check.setEnabled(bool(buildup_layers))
form.addRow("Buildup:", self.buildup_check)
self.extracu_edit = QLineEdit(f"{config.BUILDUP_EXTRA_CU_UM:g}")
self.extracu_edit.setEnabled(bool(buildup_layers))
form.addRow("Extra Cu in openings [µm]:", self.extracu_edit)
buttons = QDialogButtonBox(QDialogButtonBox.Ok | QDialogButtonBox.Cancel)
buttons.accepted.connect(self._try_accept)
buttons.rejected.connect(self.reject)
lay = QVBoxLayout(self)
lay.addLayout(form)
note = QLabel("Multiple layers are coupled through the net's "
"via/through-pad barrels. At f > 0 the foil-thickness "
"skin effect is applied per layer; lateral (proximity) "
"redistribution is not modeled, so AC results are a "
"lower bound.")
note.setWordWrap(True)
note.setStyleSheet("color: gray; font-size: 10px;")
lay.addWidget(note)
self.error_label = QLabel("")
self.error_label.setWordWrap(True)
self.error_label.setStyleSheet("color: #b02a2a;")
self.error_label.setVisible(False)
lay.addWidget(self.error_label)
lay.addWidget(buttons)
self._selection: Selection | None = None
self._desired1, self._desired2 = contact1, contact2
self.net_box.currentTextChanged.connect(self._refresh)
self._refresh()
def _refresh(self):
self.error_label.setVisible(False)
net = self.net_box.currentText()
layers = [n for n in self._layer_order
if n in self._candidates.get(net, [])]
self.layer_list.clear()
for name in layers:
item = QListWidgetItem(name)
item.setFlags(item.flags() | Qt.ItemIsUserCheckable)
item.setCheckState(Qt.Checked)
self.layer_list.addItem(item)
for box, desired in ((self.contact1_box, self._desired1),
(self.contact2_box, self._desired2)):
box.clear()
box.addItem(AUTO_CONTACT)
box.addItem(ALL_LAYERS)
box.addItems(layers)
if desired == "all":
box.setCurrentText(ALL_LAYERS)
elif desired in layers:
box.setCurrentText(desired)
def checked_layers(self) -> list[str]:
out = []
for i in range(self.layer_list.count()):
item = self.layer_list.item(i)
if item.checkState() == Qt.Checked:
out.append(item.text())
return out
def _build_selection(self) -> Selection:
"""Parse and validate every field; raises ValueError with a
user-readable message instead of silently substituting defaults
(a typo silently becoming 1 A / DC would mislabel the result)."""
layers = self.checked_layers()
if not layers:
raise ValueError("Check at least one layer.")
def number(edit: QLineEdit, name: str) -> float:
try:
return float(edit.text().strip().replace(",", "."))
except ValueError:
raise ValueError(f"{name}: '{edit.text()}' is not a number.")
current = number(self.current_edit, "Test current")
if current <= 0:
raise ValueError("Test current must be > 0 A.")
cell = None
if self.cell_edit.text().strip():
cell = number(self.cell_edit, "Cell size")
if cell <= 0:
raise ValueError("Cell size must be > 0 µm.")
try:
freq = skin.parse_frequency(self.freq_edit.text())
except ValueError:
raise ValueError(
f"Frequency: cannot parse '{self.freq_edit.text()}' "
f"(examples: 0, 142k, 1.5M).")
extra_cu = 0.0
if self.extracu_edit.isEnabled():
extra_cu = number(self.extracu_edit, "Extra Cu")
if extra_cu < 0:
raise ValueError("Extra Cu must be ≥ 0 µm.")
def contact(box: QComboBox) -> str:
t = box.currentText()
if t == AUTO_CONTACT:
return "auto"
return "all" if t == ALL_LAYERS else t
return Selection(net=self.net_box.currentText(), layers=layers,
contact1=contact(self.contact1_box),
contact2=contact(self.contact2_box),
current_a=current, cell_um=cell,
freq_hz=freq,
contact_model=self.model_box.currentData(),
include_buildup=self.buildup_check.isChecked(),
extra_cu_um=extra_cu,
include_tracks=self.tracks_check.isChecked())
def _try_accept(self) -> None:
try:
self._selection = self._build_selection()
except ValueError as e:
self.error_label.setText(str(e))
self.error_label.setVisible(True)
return
self.accept()
def ask(candidates: dict[str, list[str]], layer_order: list[str],
default_net: str, e1_label: str, e2_label: str,
contact1: str, contact2: str,
buildup_layers: list[str] | None = None) -> Selection | None:
"""Show the dialog; returns None on cancel."""
app = QApplication.instance() or QApplication([])
dlg = _Dialog(candidates, layer_order, default_net, e1_label, e2_label,
contact1, contact2, buildup_layers or [])
dlg.raise_()
dlg.activateWindow()
if dlg.exec() != QDialog.Accepted:
return None
return dlg._selection