VirtualTreeview

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About

VirtualTreeview is a treeview control built from ground up.

Its main characteristics are :

  • it is extremely fast. Adding one million nodes takes only ~700 milliseconds
  • very small memory foot print. by only allocating about 60 bytes per node
  • optimized for high speed access. It takes as few as 0.5 seconds to traverse one million nodes
  • Multiselection is supported
  • Drawing the entire tree to a bitmap or the printer is supported
  • fixed background image can be used
  • Hot style for nodes is supported
  • Nodes can have individual heights
  • Sorting via compare callback
  • Support for unicode
  • Multiple columns are supported
  • ... and many more

This component was designed for cross-platform applications.

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Author

Author: Mike Lischke
Old LCL Port: Joerg Thaler,Christian Ulrich
New LCL Port: Luiz Américo

License

LGPL or Mozilla Public Licence 1.1

Download

The new releases can be found at Lazarus CCR

The old releases can be found at Lazarus CCR.

SVN

you can checkout the actual source from

https://lazarus-ccr.svn.sourceforge.net/svnroot/lazarus-ccr/components/virtualtreeview-new/

commandline to do this is

svn co https://lazarus-ccr.svn.sourceforge.net/svnroot/lazarus-ccr/components/virtualtreeview-new/

Bug report / Feature request

Bug Tracker project Lazarus-CCR, category Virtual Treeview

Change Log

  • 20/10/2012 - 4.8.7 LCL R2 - Compatibility with Lazarus 1.0 + 64 bit support
  • 18/02/2011 - 4.8.7 LCL R1 - Sync with 4.8 branch + misc fixes
  • 11/02/2010 - 4.8.6 - First stable release of the new port

Dependencies / System Requirements

Status: Stable Tested on Windows, Linux. Needs testing on MacOS.

Known Issues

Installation

  • If new to Lazarus, read Install Packages
  • Extract the LCL Extensions package to a directory (lazarus\components\lclextensions or other of your preference)
  • Extract the Virtual Treeview package to a directory (lazarus\components\virtualtreeview or other of your preference)
  • Open lclextensions_package.lpk in LCL Extensions directory and click "Use / Add to project"
  • Open virtualtreeview_package.lpk in Virtual Treeview and click "Use / Install". Rebuild the IDE

Help

Can be found at VirtualTreeview Main Page (search for help in chm format).

Example code can be found here: VirtualTreeview Example for Lazarus