PDF Viewer for Flet

https://github.com/user-attachments/assets/9b30611e-b8b4-45fa-a8b6-a7a50d9a234d

PdfViewer is a powerful PDF viewer component for Flet applications. It provides a feature-rich interface for displaying and interacting with PDF documents in your Flet applications.

Installation

pip install flet_pdfviewer

Basic Usage

Here's a simple example of how to use the FletPdfviewer component:

import flet as ft
from flet_pdfviewer import FletPdfviewer

def main(page: ft.Page):
    pdf_viewer = FletPdfviewer(
        source="https://example.com/sample.pdf",
        source_type="network",
        show_bookmark=True,
        enable_double_tap_zooming=True
    )
    
    page.add(pdf_viewer)

ft.app(target=main)

Advanced Example

Here's a more comprehensive example that demonstrates various features:

import flet as ft
from flet_pdfviewer import FletPdfviewer

def main(page: ft.Page):
    page.vertical_alignment = ft.MainAxisAlignment.CENTER
    page.horizontal_alignment = ft.CrossAxisAlignment.CENTER

    # Create PDF viewer with event handling
    def handle_zoom_changed(e):
        print(f"Zoom level changed: {e}")

    pdf_viewer = FletPdfviewer(
        source="https://example.com/sample.pdf",
        source_type="network",
        show_bookmark=True,
        enable_double_tap_zooming=True,
        on_zoom_level_changed=handle_zoom_changed,
        password="optional_password",  # If PDF is password-protected
        expand=True
    )

    # Add controls for PDF interaction
    def jump_to_page_3(e):
        pdf_viewer.jump_to_page(3)

    def set_zoom_2x(e):
        pdf_viewer.set_zoom_level(2.0)

    page.add(
        pdf_viewer,
        ft.Row(
            [ft.ElevatedButton("Go to Page 3", on_click=jump_to_page_3),
             ft.ElevatedButton("Zoom 2x", on_click=set_zoom_2x)]
        )
    )

ft.app(target=main)

API Reference

Constructor Parameters

• source (Optional[str]): The source of the PDF document. Can be a URL, file path, or asset path.
• source_type (Optional[str]): Type of the source. Can be "network", "file", or "asset". Default is "network".
• show_bookmark (Optional[bool]): Whether to show the bookmark panel. Default is True.
• memory_bytes (Optional[str]): PDF data as bytes in memory.
• password (Optional[str]): Password for protected PDF documents.
• enable_double_tap_zooming (Optional[bool]): Enable zooming with double tap. Default is True.
• on_zoom_level_changed (Optional[Callable]): Callback function for zoom level changes.

Standard Control Properties

• width (OptionalNumber): Control width.
• height (OptionalNumber): Control height.
• expand (Optional[bool]): Whether the control should expand to fill available space.
• opacity (OptionalNumber): Control opacity.
• tooltip (Optional[str]): Tooltip text.
• visible (Optional[bool]): Control visibility.

Properties

• source: Get or set the PDF source.
• source_type: Get or set the source type ("network", "file", "asset").
• show_bookmark: Get or set bookmark panel visibility.
• memory_bytes: Get or set PDF data in memory.
• password: Get or set PDF password.
• enable_double_tap_zooming: Get or set double tap zooming.

Methods

• open_bookmark_view(): Opens the bookmark view.
• jump_to_page(page_number: int): Jumps to the specified page number.
• set_zoom_level(zoom_level: float): Sets the zoom level (between 1.0 and 3.0).
• get_current_page() -> int: Gets the current page number (async).
• get_current_zoom_level() -> float: Gets the current zoom level (async).
• get_total_pages() -> int: Gets the total number of pages (async).

Events

• on_zoom_level_changed: Triggered when zoom level changes.

Notes

• For network PDFs, ensure the URL is accessible and the PDF is not blocked by CORS policies.
• Password-protected PDFs require the correct password to be set before viewing.
• Zoom levels are typically constrained between 1.0 and 3.0.
• Async methods should be awaited when called.