LogViewer

LogViewer is a general purpose message viewer for log messages with support for multiple sources to receive messages from.

• Windows OutputDebugString API
• Windows IPC (using WM_COPY messages)
• ZeroMQ (PUB/SUB socket) for logging over the network. It demonstrates the brilliant performance of ZMQ sockets.
• Serial port
• MQTT
• File change monitor

Each of these receivers support multiple subscribers for which messages can be displayed in a dedicated logviewer.

The DDuce library provides the Logger module to add logging to your application (currently only Delphi support, but FPC-Lazarus support will be added soon). The DDuce demo application demonstrates the currently supported message types.

General layout

• the main log treeview
• watches with history
• method callstack level display
• message details

Features currently supported using the ILogger interface methods

• Info/Warning and Error messages
• Method tracking with stack display showing execution times
• Screenshot capture
• Conditional logging
• Checkpoints
• Counters
• Watches + value history support
• Datasets
• Bitmaps
• Objects
• Components
• Native value types with type information
• Text with suppport for multiple highlighters
• Actions
• Up to 32 logging levels

Overview

A mindmap with a technical overview of the application: LogViewer.xmind

Libraries used

The Object Pascal (Delphi) sources depend on the following open source libraries and components:

• Spring4D
• DSharp
• Virtual treeview
• DDuce
• ZeroMQ
• zcontrols
• TBCEditor
• TChromeTabs
• Ararat Synapse
• OMultiPanel
• KControls
• JsonDataObjects
• midiio

Screenshots

Here is a preliminary look of the application (2018/09/22):