Fix folder navigation and restyle navigation arrows

README.md

@@ -1,58 +1,51 @@
 <div style="display:flex; gap:16px; align-items:center;">
   <img src="app/assets/logo.png" alt="ICRA" width="140"/>
   <div>
-    <strong>Interactive Color Range Analyzer</strong> is a Tkinter-based desktop tool for highlighting customised colour ranges in images.<br/>
-    Load a single photo or an entire folder, fine-tune hue/saturation/value sliders, and export overlays complete with quick statistics.
+    <strong>Interactive Color Range Analyzer</strong> is being reimagined with a <em>PySide6</em> user interface.<br/>
+    This branch focuses on building a native desktop shell with modern window controls before porting the colour-analysis features.
   </div>
 </div>
 
-## Features
-- Two synced previews (original + overlay)
-- Hue/Sat/Value sliders with presets and image colour picker
-- Exclusion rectangles or freehand polygons that persist while browsing
-- Theme toggle (light/dark) with rounded toolbar buttons and accent-aware highlights
-- Folder support with wrap-around previous/next navigation
-- Quick overlay export (PNG) with configurable defaults and language settings via `config.toml`
+## Current prototype
+- Custom frameless window with minimise / maximise / close controls that hook into Windows natively
+- Dark themed layout and basic image preview powered by Qt
+- “Open image” workflow that displays the selected asset scaled to the viewport
+
+> ⚠️ Legacy Tk features (sliders, exclusions, folder navigation, stats) are not wired up yet. The goal here is to validate the PySide6 shell first.
 
 ## Requirements
-- Python 3.11+ (3.10 works with `tomli`)
+- Python 3.11+
 - [uv](https://github.com/astral-sh/uv) for dependency management
-- Tkinter (install separately on some Linux distros)
+- Windows 10/11 recommended (PySide6 build included; Linux/macOS should work but are untested in this branch)
 
-## Setup with uv (Windows PowerShell)
+## Setup with uv (PowerShell example)
 ```bash
 git clone https://git.lukasmahler.de/lm/ICRA.git
 cd ICRA
 uv venv
-source .venv/Scripts/activate
+source .venv/Scripts/activate    # macOS/Linux: source .venv/bin/activate
 uv pip install .
 uv run icra
 ```
-The launcher copies Tcl/Tk resources into the virtualenv on first run, so no manual environment tweaks are needed.
-On macOS/Linux activate with `source .venv/bin/activate` instead.
 
-## Workflow
-1. Load an image (`🖼`) or a folder (`📂`).
-2. Pick a colour (`🎨` dialog, `🖱️` image click, or preset swatch).
-3. Fine‑tune sliders; watch the overlay update on the right.
-4. Toggle freehand mode (`△`) or stick with rectangles and mark areas to exclude (right mouse drag).
-5. Move through folder images with `⬅️` / `➡️`; exclusions stay put unless you opt into automatic resets.
-6. Save an overlay (`💾`) when ready.
+The app launches directly as a PySide6 GUI—no browser or local web server involved. Use the “Open Image…” button to load a file and test resizing/snap behaviour.
 
-## Project Layout
+## Roadmap (branch scope)
+1. Port hue/saturation/value controls to Qt widgets
+2. Re-implement exclusion drawing using QPainter overlays
+3. Integrate existing image-processing logic (`app/logic`) with the new UI
+
+## Project layout
 ```
 app/
-  app.py          # main app assembly
-  gui/            # UI, theme, picker mixins
-  logic/          # image ops, defaults, config helpers
-  lang/           # localisation TOML files
-config.toml       # optional defaults
-main.py           # entry point
+  assets/        # Shared branding
+  gui/, logic/   # Legacy Tk code kept for reference
+  qt/            # New PySide6 implementation (main_window, app bootstrap)
+config.toml      # Historical defaults (unused in the prototype)
+main.py          # Entry point -> PySide6 launcher
 ```
 
-## Localisation
-- English and German translations ship in `app/lang`. Set the desired language via the top-level `language` key in `config.toml`.
-
-## Development
-- Quick check: `uv run python -m compileall app main.py`
-- Contributions welcome; include screenshots for UI tweaks.
+## Development notes
+- Quick syntax check: `uv run python -m compileall app main.py`
+- Uploaded images are not persisted; the preview uses Qt pixmaps only.
+- Contributions welcome—please target this branch with PySide6-specific improvements.

app/__init__.py

@@ -1,5 +1,15 @@
-"""Application package."""
+"""Application package exposing the PySide6 entry points."""
 
-from .app import ICRAApp, start_app
+from __future__ import annotations
 
-__all__ = ["ICRAApp", "start_app"]
+try:  # Legacy Tk support remains optional
+    from .app import ICRAApp, start_app as start_tk_app  # type: ignore[attr-defined]
+except Exception:  # pragma: no cover
+    ICRAApp = None  # type: ignore[assignment]
+    start_tk_app = None  # type: ignore[assignment]
+
+from .qt import create_application as create_qt_app, run as run_qt_app
+
+start_app = run_qt_app
+
+__all__ = ["ICRAApp", "start_tk_app", "create_qt_app", "run_qt_app", "start_app"]

app/launcher.py

@@ -1,49 +1,12 @@
-"""Launcher ensuring Tcl/Tk resources are available before starting ICRA."""
+"""Launcher for the PySide6 ICRA application."""
 
 from __future__ import annotations
 
-import os
-import shutil
-import subprocess
-import sys
-from pathlib import Path
-
-
-def _copy_tcl_runtime(venv_root: Path) -> tuple[Path, Path] | None:
-    """Copy Tcl/Tk directories from the base interpreter into the venv if needed."""
-
-    base_prefix = Path(getattr(sys, "base_prefix", sys.prefix))
-    base_tcl_dir = base_prefix / "tcl"
-    if not base_tcl_dir.exists():
-        return None
-
-    tcl_src = base_tcl_dir / "tcl8.6"
-    tk_src = base_tcl_dir / "tk8.6"
-    if not tcl_src.exists() or not tk_src.exists():
-        return None
-
-    target_root = venv_root / "tcl"
-    tcl_dest = target_root / "tcl8.6"
-    tk_dest = target_root / "tk8.6"
-
-    if not tcl_dest.exists():
-        shutil.copytree(tcl_src, tcl_dest, dirs_exist_ok=True)
-    if not tk_dest.exists():
-        shutil.copytree(tk_src, tk_dest, dirs_exist_ok=True)
-
-    return tcl_dest, tk_dest
+from .qt import run
 
 
 def main() -> int:
-    venv_root = Path(sys.prefix)
-    tcl_paths = _copy_tcl_runtime(venv_root)
-
-    env = os.environ.copy()
-    if tcl_paths:
-        env.setdefault("TCL_LIBRARY", str(tcl_paths[0]))
-        env.setdefault("TK_LIBRARY", str(tcl_paths[1]))
-
-    return subprocess.call([sys.executable, "main.py"], env=env)
+    return run()
 
 
 if __name__ == "__main__":

app/qt/__init__.py

@@ -0,0 +1,7 @@
+"""PySide6 application entry points."""
+
+from __future__ import annotations
+
+from .app import create_application, run
+
+__all__ = ["create_application", "run"]

app/qt/app.py

@@ -0,0 +1,61 @@
+"""Application bootstrap for the PySide6 GUI."""
+
+from __future__ import annotations
+
+import sys
+from pathlib import Path
+
+from PySide6 import QtGui, QtWidgets
+
+from app.logic import DEFAULTS, LANGUAGE, RESET_EXCLUSIONS_ON_IMAGE_CHANGE
+from .main_window import MainWindow
+
+
+def create_application() -> QtWidgets.QApplication:
+    """Create the Qt application instance with customised styling."""
+    app = QtWidgets.QApplication.instance()
+    if app is None:
+        app = QtWidgets.QApplication(sys.argv)
+
+    app.setOrganizationName("ICRA")
+    app.setApplicationName("Interactive Color Range Analyzer")
+    app.setApplicationDisplayName("ICRA")
+
+    palette = QtGui.QPalette()
+    palette.setColor(QtGui.QPalette.Window, QtGui.QColor("#111216"))
+    palette.setColor(QtGui.QPalette.WindowText, QtGui.QColor("#f5f5f5"))
+    palette.setColor(QtGui.QPalette.Base, QtGui.QColor("#1a1b21"))
+    palette.setColor(QtGui.QPalette.AlternateBase, QtGui.QColor("#20212a"))
+    palette.setColor(QtGui.QPalette.Button, QtGui.QColor("#20212a"))
+    palette.setColor(QtGui.QPalette.ButtonText, QtGui.QColor("#f5f5f5"))
+    palette.setColor(QtGui.QPalette.Text, QtGui.QColor("#f5f5f5"))
+    palette.setColor(QtGui.QPalette.Highlight, QtGui.QColor("#5168ff"))
+    palette.setColor(QtGui.QPalette.HighlightedText, QtGui.QColor("#ffffff"))
+    app.setPalette(palette)
+
+    font = QtGui.QFont("Segoe UI", 10)
+    app.setFont(font)
+
+    logo_path = Path(__file__).resolve().parents[1] / "assets" / "logo.png"
+    if logo_path.exists():
+        app.setWindowIcon(QtGui.QIcon(str(logo_path)))
+
+    return app
+
+
+def run() -> int:
+    """Run the PySide6 GUI."""
+    app = create_application()
+    window = MainWindow(
+        language=LANGUAGE,
+        defaults=DEFAULTS.copy(),
+        reset_exclusions=RESET_EXCLUSIONS_ON_IMAGE_CHANGE,
+    )
+    primary_screen = app.primaryScreen()
+    if primary_screen is not None:
+        geometry = primary_screen.availableGeometry()
+        window.setGeometry(geometry)
+        window.showMaximized()
+    else:
+        window.showMaximized()
+    return app.exec()

app/qt/image_processor.py

@@ -0,0 +1,243 @@
+"""Minimal image processing pipeline adapted for the Qt frontend."""
+
+from __future__ import annotations
+
+import colorsys
+from dataclasses import dataclass
+from pathlib import Path
+from typing import Dict, Iterable, Tuple
+
+from PIL import Image, ImageDraw
+from PySide6 import QtGui
+
+from app.logic import PREVIEW_MAX_SIZE
+
+
+@dataclass
+class Stats:
+    matches_all: int = 0
+    total_all: int = 0
+    matches_keep: int = 0
+    total_keep: int = 0
+    matches_excl: int = 0
+    total_excl: int = 0
+
+    def summary(self, translate) -> str:
+        if self.total_all == 0:
+            return translate("stats.placeholder")
+        with_pct = (self.matches_keep / self.total_keep * 100) if self.total_keep else 0.0
+        without_pct = (self.matches_all / self.total_all * 100) if self.total_all else 0.0
+        excluded_pct = (self.total_excl / self.total_all * 100) if self.total_all else 0.0
+        excluded_match_pct = (self.matches_excl / self.total_excl * 100) if self.total_excl else 0.0
+        return translate(
+            "stats.summary",
+            with_pct=with_pct,
+            without_pct=without_pct,
+            excluded_pct=excluded_pct,
+            excluded_match_pct=excluded_match_pct,
+        )
+
+
+class QtImageProcessor:
+    """Process images and build overlays for the Qt UI."""
+
+    def __init__(self) -> None:
+        self.orig_img: Image.Image | None = None
+        self.preview_img: Image.Image | None = None
+        self.overlay_img: Image.Image | None = None
+        self.preview_paths: list[Path] = []
+        self.current_index: int = -1
+        self.stats = Stats()
+
+        self.defaults: Dict[str, int] = {
+            "hue_min": 0,
+            "hue_max": 360,
+            "sat_min": 25,
+            "val_min": 15,
+            "val_max": 100,
+            "alpha": 120,
+        }
+        self.hue_min = self.defaults["hue_min"]
+        self.hue_max = self.defaults["hue_max"]
+        self.sat_min = self.defaults["sat_min"]
+        self.val_min = self.defaults["val_min"]
+        self.val_max = self.defaults["val_max"]
+        self.alpha = self.defaults["alpha"]
+
+        self.exclude_shapes: list[dict[str, object]] = []
+        self.reset_exclusions_on_switch: bool = False
+
+    def set_defaults(self, defaults: dict) -> None:
+        for key in self.defaults:
+            if key in defaults:
+                self.defaults[key] = int(defaults[key])
+        for key, value in self.defaults.items():
+            setattr(self, key, value)
+        self._rebuild_overlay()
+
+    # thresholds -------------------------------------------------------------
+
+    def set_threshold(self, key: str, value: int) -> None:
+        setattr(self, key, value)
+        if self.preview_img is not None:
+            self._rebuild_overlay()
+
+    # image handling --------------------------------------------------------
+
+    def load_single_image(self, path: Path, *, reset_collection: bool = True) -> Path:
+        image = Image.open(path).convert("RGBA")
+        self.orig_img = image
+        if reset_collection:
+            self.preview_paths = [path]
+            self.current_index = 0
+        self._build_preview()
+        self._rebuild_overlay()
+        return path
+
+    def load_folder(self, paths: Iterable[Path], start_index: int = 0) -> Path:
+        self.preview_paths = list(paths)
+        if not self.preview_paths:
+            raise ValueError("No images in folder.")
+        self.current_index = max(0, min(start_index, len(self.preview_paths) - 1))
+        return self._load_image_at_current()
+
+    def next_image(self) -> Path | None:
+        if not self.preview_paths:
+            return None
+        self.current_index = (self.current_index + 1) % len(self.preview_paths)
+        return self._load_image_at_current()
+
+    def previous_image(self) -> Path | None:
+        if not self.preview_paths:
+            return None
+        self.current_index = (self.current_index - 1) % len(self.preview_paths)
+        return self._load_image_at_current()
+
+    def _load_image_at_current(self) -> Path:
+        path = self.preview_paths[self.current_index]
+        return self.load_single_image(path, reset_collection=False)
+
+    # preview/overlay -------------------------------------------------------
+
+    def _build_preview(self) -> None:
+        if self.orig_img is None:
+            self.preview_img = None
+            return
+        width, height = self.orig_img.size
+        max_w, max_h = PREVIEW_MAX_SIZE
+        scale = min(max_w / width, max_h / height)
+        if scale <= 0:
+            scale = 1.0
+        size = (max(1, int(width * scale)), max(1, int(height * scale)))
+        self.preview_img = self.orig_img.resize(size, Image.LANCZOS)
+
+    def _rebuild_overlay(self) -> None:
+        if self.preview_img is None:
+            self.overlay_img = None
+            self.stats = Stats()
+            return
+        base = self.preview_img.convert("RGBA")
+        overlay = Image.new("RGBA", base.size, (0, 0, 0, 0))
+        draw = ImageDraw.Draw(overlay)
+        pixels = base.load()
+        width, height = base.size
+        highlight = (255, 0, 0, int(self.alpha))
+        matches_all = total_all = 0
+        matches_keep = total_keep = 0
+        matches_excl = total_excl = 0
+
+        mask = self._build_exclusion_mask(base.size)
+        mask_px = mask.load() if mask else None
+
+        for y in range(height):
+            for x in range(width):
+                r, g, b, a = pixels[x, y]
+                if a == 0:
+                    continue
+                match = self._matches(r, g, b)
+                excluded = bool(mask_px and mask_px[x, y])
+                total_all += 1
+                if excluded:
+                    total_excl += 1
+                    if match:
+                        matches_excl += 1
+                else:
+                    total_keep += 1
+                    if match:
+                        draw.point((x, y), fill=highlight)
+                        matches_keep += 1
+                if match:
+                    matches_all += 1
+
+        self.overlay_img = overlay
+        self.stats = Stats(
+            matches_all=matches_all,
+            total_all=total_all,
+            matches_keep=matches_keep,
+            total_keep=total_keep,
+            matches_excl=matches_excl,
+            total_excl=total_excl,
+        )
+
+    # helpers ----------------------------------------------------------------
+
+    def _matches(self, r: int, g: int, b: int) -> bool:
+        h, s, v = colorsys.rgb_to_hsv(r / 255.0, g / 255.0, b / 255.0)
+        hue = (h * 360.0) % 360.0
+        if self.hue_min <= self.hue_max:
+            hue_ok = self.hue_min <= hue <= self.hue_max
+        else:
+            hue_ok = hue >= self.hue_min or hue <= self.hue_max
+        sat_ok = s * 100.0 >= self.sat_min
+        val_ok = self.val_min <= v * 100.0 <= self.val_max
+        return hue_ok and sat_ok and val_ok
+
+    # exported data ----------------------------------------------------------
+
+    def preview_pixmap(self) -> QtGui.QPixmap:
+        return self._to_pixmap(self.preview_img)
+
+    def overlay_pixmap(self) -> QtGui.QPixmap:
+        if self.preview_img is None or self.overlay_img is None:
+            return QtGui.QPixmap()
+        merged = Image.alpha_composite(self.preview_img.convert("RGBA"), self.overlay_img)
+        return self._to_pixmap(merged)
+
+    @staticmethod
+    def _to_pixmap(image: Image.Image | None) -> QtGui.QPixmap:
+        if image is None:
+            return QtGui.QPixmap()
+        buffer = image.tobytes("raw", "RGBA")
+        qt_image = QtGui.QImage(buffer, image.width, image.height, QtGui.QImage.Format_RGBA8888)
+        return QtGui.QPixmap.fromImage(qt_image)
+
+    # exclusions -------------------------------------------------------------
+
+    def set_exclusions(self, shapes: list[dict[str, object]]) -> None:
+        copied: list[dict[str, object]] = []
+        for shape in shapes:
+            kind = shape.get("kind")
+            if kind == "rect":
+                coords = tuple(shape.get("coords", (0, 0, 0, 0)))  # type: ignore[assignment]
+                copied.append({"kind": "rect", "coords": tuple(int(c) for c in coords)})
+            elif kind == "polygon":
+                pts = shape.get("points", [])
+                copied.append({"kind": "polygon", "points": [(int(x), int(y)) for x, y in pts]})
+        self.exclude_shapes = copied
+        self._rebuild_overlay()
+
+    def _build_exclusion_mask(self, size: Tuple[int, int]) -> Image.Image | None:
+        if not self.exclude_shapes:
+            return None
+        mask = Image.new("L", size, 0)
+        draw = ImageDraw.Draw(mask)
+        for shape in self.exclude_shapes:
+            kind = shape.get("kind")
+            if kind == "rect":
+                x0, y0, x1, y1 = shape["coords"]  # type: ignore[index]
+                draw.rectangle([x0, y0, x1, y1], fill=255)
+            elif kind == "polygon":
+                points = shape.get("points", [])
+                if len(points) >= 3:
+                    draw.polygon(points, fill=255)
+        return mask

pyproject.toml

@@ -1,13 +1,14 @@
 [project]
 name = "icra"
 version = "0.1.0"
-description = "Interactive Color Range Analyzer (ICRA) for Tkinter"
+description = "Interactive Color Range Analyzer (ICRA) desktop app (PySide6)"
 readme = "README.md"
 authors = [{ name = "ICRA contributors" }]
 license = "MIT"
 requires-python = ">=3.10"
 dependencies = [
     "pillow>=10.0.0",
+    "PySide6>=6.7",
 ]
 
 [project.scripts]