Added a `ZoomStepPercentage` property to `PdfViewerOptions` to allow configurable zoom step increments (1-50, default 5%). Updated `EnvelopeViewer.razor` to use this property for the zoom slider step. Modified `pdf-viewer.js` to apply the zoom step percentage for mouse wheel zoom, `zoomIn`, and `zoomOut` methods.
Included `ZoomStepPercentage` in `appsettings.json` and `setQualityOptions` for dynamic updates. Reduced `ZoomTransitionDuration` in `appsettings.json` from 900ms to 150ms for faster zoom transitions. These changes ensure consistent and customizable zoom behavior across the application.
Introduced `PdfViewerOptions` class to centralize PDF viewer
settings such as scaling, HiDPI support, zoom transitions,
and rendering delays. Bound these options to `appsettings.json`
for dynamic configuration.
Injected `PdfViewerOptions` into `EnvelopeViewer.razor` and
updated `OnInitializedAsync` to pass settings to JavaScript.
Replaced hardcoded values in `pdf-viewer.js` with configurable
options, improving maintainability and flexibility.
Enhanced rendering logic to respect HiDPI settings, maximum
DPR, and smooth zoom transitions. Improved thumbnail rendering
with configurable delays to optimize performance.
Refactor the `ToggleThumbnails` method to be asynchronous (`async Task`) to support asynchronous operations. Add logic to re-render thumbnails when toggled on, including forcing a UI update, waiting for DOM rendering, and invoking `RenderThumbnailsAsync`. These changes improve the user experience by ensuring thumbnails are properly updated when displayed.
Introduced a resizable splitter for the PDF thumbnail sidebar, allowing users to dynamically adjust its width. Added `_thumbnailWidth` property with min/max constraints and implemented mouse event handlers (`OnSplitterMouseDown`, `OnSplitterMouseMove`, `OnSplitterMouseUp`) to manage resizing.
Integrated JavaScript interop to attach/detach resize event listeners and save user preferences to `localStorage`. Updated `pdf-viewer.js` to handle resizing state and cleanup. Styled the splitter in `envelope-viewer.css` with hover/active states and ensured smooth interaction.
Persisted thumbnail width across sessions and added error handling for `localStorage`. Enhanced user experience with intuitive resizing and improved UI flexibility.
Removed the header section of the PDF thumbnail sidebar, including the title and close button, to streamline the UI. Updated Razor logic to control sidebar visibility directly, eliminating the need for `.pdf-thumbnails--visible`. Deleted associated CSS styles for the removed elements. Retained scrolling and padding styles for the thumbnail content.
Refactor the PDF thumbnail sidebar to use Razor logic for dynamic visibility control, removing reliance on CSS-based toggling. Updated the `pdf-thumbnails` layout to use `relative` positioning and improved its integration with the viewer structure. Introduced a new `pdf-canvas-wrapper` for better styling, scrolling, and alignment of the main PDF canvas.
Enhanced responsiveness by adjusting `pdf-thumbnails`, `pdf-thumbnails__content`, and `pdf-toolbar` styles for smaller screens. Deprecated the `pdf-thumbnails--visible` class and removed redundant CSS properties to simplify the codebase. Updated the `pdf-frame` layout to use a column-based flexbox for better alignment.
These changes improve maintainability, responsiveness, and the overall user experience of the `EnvelopeViewer` component.
Added delays in `EnvelopeViewer.razor` to ensure the DOM is ready and to render thumbnails sequentially, preventing browser overload and keeping the UI responsive. Enhanced error handling in `RenderThumbnailsAsync` with detailed debug logs.
In `pdf-viewer.js`, introduced a retry mechanism to wait for canvas elements to appear in the DOM and added detailed error logging for missing canvases or PDF document issues. Replaced generic comments with specific error messages to improve debugging.
These changes enhance the robustness, reliability, and user experience of the PDF viewer.
Introduced a PDF thumbnail sidebar in `EnvelopeViewer.razor` to enhance navigation between pages. Added a toggle button to show/hide the sidebar and implemented dynamic thumbnail rendering for all pages.
Updated `envelope-viewer.css` with styles for the sidebar, including hover/active states, transitions, and mobile responsiveness.
Enhanced `pdf-viewer.js` with a `renderThumbnail` method to render page previews on canvas elements. Added error handling for non-critical thumbnail rendering issues.
Improved user experience by providing an intuitive way to preview and navigate PDF pages.
Updated the zoom slider in `EnvelopeViewer.razor` to allow finer adjustments by changing the step size from 25 to 1. Modified `pdf-viewer.js` to enable smoother zooming with 1% increments for `zoomIn` and `zoomOut` methods. Capped zoom levels between 0.5 and 3.0. Enhanced mouse wheel zoom behavior to adjust zoom in 1% steps and notify the .NET side of changes via `OnZoomChanged`. Ensured pages are re-rendered after each zoom adjustment.
The PDF toolbar in `EnvelopeViewer.razor` has been redesigned to improve usability and functionality. Key changes include:
- Added buttons for page navigation, zooming, and preset zoom levels.
- Introduced a zoom slider and page input field for direct control.
- Added "Fit to Width" and "Set Zoom to 100%" features.
- Updated `ZoomIn` and `ZoomOut` methods with boundary checks.
- Added new methods: `SetZoom`, `OnZoomSliderChanged`, `OnPageInputChanged`, and `FitToWidth`.
Styling updates in `envelope-viewer.css` include a modernized toolbar design with rounded corners, shadows, and responsive layouts for smaller screens.
`pdf-viewer.js` was updated with `setScale` and `fitToWidth` methods to support the new functionality. These changes enhance the interactivity, flexibility, and user experience of the PDF viewer.
Added `DotNetObjectReference` in `EnvelopeViewer.razor` to enable Blazor-JS communication. Updated `OnAfterRenderAsync` to pass the reference to `pdfViewer.initialize`. Introduced `[JSInvokable]` method `OnZoomChanged` to handle zoom updates from JavaScript.
Enhanced `DisposeAsync` to clean up resources, including disposing of the `.NET reference` and invoking a JavaScript `dispose` method.
In `pdf-viewer.js`, modified `initialize` to accept a `.NET reference` and added `attachWheelEvent` to handle zooming via mouse wheel with `Ctrl`/`Meta` key. Updated `dispose` to clean up event listeners and reset the `.NET reference`. Added `getScale` to retrieve the current zoom scale.
Improved resource cleanup and event handling to prevent memory leaks and ensure stability.
Moved inline styles from `EnvelopeViewer.razor` to a new external
CSS file `envelope-viewer.css` for better maintainability and
separation of concerns. Added external JavaScript dependencies
(`pdf.js` and `pdf-viewer.js`) to enable PDF rendering.
Fixed encoding issues in error messages and improved the layout
structure with responsive design rules. Enhanced readability and
usability by organizing styles and ensuring proper localization
support.
Simplified the component by removing unnecessary debug output
and redundant comments. Removed the `OnAfterRenderAsync`
method, which previously handled PDF viewer initialization
and related JavaScript calls. This suggests the initialization
logic has been moved elsewhere or is no longer required in
this component.
Introduced a new Blazor component `EnvelopeViewer.razor` to display PDF documents with a user-friendly interface. The component supports dynamic routing via `/envelope/{EnvelopeKey}` and integrates the `pdf.js` library for efficient PDF rendering in the browser.
Key features include:
- Zoom and navigation controls (Next/Previous page, Zoom In/Out).
- Loading spinner, error handling, and fallback UI for robustness.
- Responsive design with modern styling using CSS.
- JavaScript interop via `pdf-viewer.js` for managing PDF rendering, scaling, and navigation.
Added lifecycle methods (`OnInitializedAsync`, `OnAfterRenderAsync`) for dynamic loading and rendering. Ensured asynchronous operations for smooth user interactions. Included a `DisposeAsync` method for cleanup.
