notebookvb

Medevio/60 ScansProcessing/preview_viewer.py

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+"""
+Standalone PDF/obrázek náhled — spouští se jako subprocess z extract_patient_info.py.
+Argumenty: preview_viewer.py <soubor> [--delete-on-close]
+"""
+import sys
+from pathlib import Path
+import tkinter as tk
+
+
+def main():
+    if len(sys.argv) < 2:
+        sys.exit(1)
+
+    pdf_path = Path(sys.argv[1])
+    delete_on_close = "--delete-on-close" in sys.argv
+
+    try:
+        from PIL import Image, ImageTk
+        import fitz
+    except ImportError:
+        sys.exit(2)
+
+    suffix = pdf_path.suffix.lower()
+    if suffix in (".jpg", ".jpeg", ".png"):
+        pil_img = Image.open(pdf_path)
+        doc = None
+    else:
+        doc = fitz.open(str(pdf_path))
+        pil_img = None
+
+    root = tk.Tk()
+    root.tk.call("encoding", "system", "utf-8")
+
+    sh = root.winfo_screenheight()
+    page_count = len(doc) if doc else 1
+    current = [0]
+    photo_ref = [None]
+
+    def render(n) -> Image.Image:
+        if doc is not None:
+            page = doc[n]
+            zoom = min(700 / page.rect.width, (sh - 150) / page.rect.height)
+            pix = page.get_pixmap(matrix=fitz.Matrix(zoom, zoom))
+            return Image.frombytes("RGB", (pix.width, pix.height), pix.samples)
+        else:
+            img = pil_img.copy()
+            img.thumbnail((700, sh - 150), Image.LANCZOS)
+            return img
+
+    def on_close():
+        if doc:
+            try:
+                doc.close()
+            except Exception:
+                pass
+        if delete_on_close:
+            try:
+                pdf_path.unlink(missing_ok=True)
+            except Exception:
+                pass
+        root.destroy()
+
+    root.title(pdf_path.stem)
+    root.attributes("-topmost", True)
+    root.resizable(False, False)
+    root.protocol("WM_DELETE_WINDOW", on_close)
+
+    lbl_img = tk.Label(root)
+    lbl_img.pack()
+
+    frame_nav = tk.Frame(root)
+    frame_nav.pack(pady=4)
+
+    lbl_page = tk.Label(frame_nav, font=("Segoe UI", 9))
+    lbl_page.pack(side="left", padx=10)
+
+    def show(n):
+        current[0] = n
+        img = render(n)
+        photo_ref[0] = ImageTk.PhotoImage(img)
+        lbl_img.config(image=photo_ref[0])
+        lbl_page.config(text=f"Strana {n + 1} / {page_count}")
+        btn_prev.config(state="normal" if n > 0 else "disabled")
+        btn_next.config(state="normal" if n < page_count - 1 else "disabled")
+
+    btn_prev = tk.Button(frame_nav, text="◄ Předchozí", command=lambda: show(current[0] - 1))
+    btn_prev.pack(side="left")
+    btn_next = tk.Button(frame_nav, text="Další ►", command=lambda: show(current[0] + 1))
+    btn_next.pack(side="left")
+
+    show(0)
+    root.update_idletasks()
+    sw = root.winfo_screenwidth()
+    w = root.winfo_width()
+    h = root.winfo_height()
+    x = (sw - w) // 2
+    root.geometry(f"+{x}+0")
+
+    # Zapiš geometrii do souboru pokud byl předán argument --write-geometry=<cesta>
+    import json as _json
+    for arg in sys.argv:
+        if arg.startswith("--write-geometry="):
+            geom_path = Path(arg.split("=", 1)[1])
+            geom_path.write_text(_json.dumps({"x": x, "y": 0, "w": w, "h": h}), encoding="utf-8")
+            break
+
+    root.mainloop()
+
+
+if __name__ == "__main__":
+    main()