Undo/Redo Framework

The Qt Undo/Redo Framework component is an undo/redo framework based on the Command design pattern.

This framework allows developers to easily implement multiplatform undo/redo functionality in their applications.

This Qt Solutions component is for Qt 3. For Qt 4 Solutions, please visit the Qt 4 Solutions Catalog.

Documentation:

Overview

• Undo/Redo Framework

• QtCommand
• QtUndoStack
• QtUndoManager
• QtUndoListBox

• Art Editor Example

Tested on:

• Qt 3.3.6 / Windows XP / MSVC.NET 2003
• Qt 3.3.6 / Linux / gcc
• Qt 3.3.6 / SunOS 5.9 / SunC++
• Qt 3.3.6 / MacOS X 10.4 / gcc

Unsupported platforms:

Only the tested platforms are supported, however the classes should be platform independent and are likely to work on the platforms supported by Qt.

Download Commercial Edition:

• qtundo-1.5-enterprise.zip
• qtundo-1.5-enterprise.tar.gz

Changes:

• 1.5: Size limitation of undo stack now works.
• 1.5: Fix possible crash after clear().
• 1.5: Proper update of QtUndoListBox.
• 1.4: Bugfixes.
• 1.3: QtUndoStack now has undo/redo QActions associated with it.
• 1.1: Added signal QtUndoStack::commandExecuted() which is emitted whenever a QtCommand is undone or redone.
• 1.1: Added signals to QtUndoManager: canUndoChanged(), canRedoChanged(), undoDescriptionChanged(), redoDescriptionChanged().
• 1.1: Added QtUndoStack::setClean() and signal QtUndoStack::cleanChanged() to signal when the edited object returns to the clean (saved) state.