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Difference between revisions of "E4/EAS/Undo Redo"
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==Eclipse 3.x API== | ==Eclipse 3.x API== | ||
In Eclipse 3.x, the IWorkbenchOperationSupport interface provided by PlatformUI.getWorkbench().getOperationSupport() can be used for managing undo/redo support. | In Eclipse 3.x, the IWorkbenchOperationSupport interface provided by PlatformUI.getWorkbench().getOperationSupport() can be used for managing undo/redo support. | ||
| + | |||
| + | ===Execution operation=== | ||
| + | <source lang="java"> | ||
| + | IWorkbenchOperationSupport operationSupport = PlatformUI.getWorkbench().getOperationSupport(); | ||
| + | IOperationHistory operationHistory = operationSupport.getOperationHistory(); | ||
| + | IStatus status = operationHistory.execute(undoableOperation, null, null); | ||
| + | if (!status.isOK()) { | ||
| + | // handle the error | ||
| + | } | ||
| + | </source> | ||
| + | |||
| + | ===Undo operation=== | ||
| + | <source lang="java"> | ||
| + | IWorkbenchOperationSupport operationSupport = PlatformUI.getWorkbench().getOperationSupport(); | ||
| + | IOperationHistory operationHistory = operationSupport.getOperationHistory(); | ||
| + | IStatus status = operationHistory.undo(undoableOperation, null, null); | ||
| + | if (!status.isOK()) { | ||
| + | // handle the error | ||
| + | } | ||
| + | </source> | ||
| + | |||
| + | ===Redo operation=== | ||
| + | <source lang="java"> | ||
| + | IWorkbenchOperationSupport operationSupport = PlatformUI.getWorkbench().getOperationSupport(); | ||
| + | IOperationHistory operationHistory = operationSupport.getOperationHistory(); | ||
| + | IStatus status = operationHistory.redo(undoableOperation, null, null); | ||
| + | if (!status.isOK()) { | ||
| + | // handle the error | ||
| + | } | ||
| + | </source> | ||
Latest revision as of 12:50, 26 October 2009
Components should be able to isolate their own atomic operations for supporting undo/redo. These should be connected to the base platform in some way to ensure that when a user invokes undo/redo, the context of the application can be analyzed and the right operation stack can be processed for undoing/redoing.
Eclipse 3.x API
In Eclipse 3.x, the IWorkbenchOperationSupport interface provided by PlatformUI.getWorkbench().getOperationSupport() can be used for managing undo/redo support.
Execution operation
IWorkbenchOperationSupport operationSupport = PlatformUI.getWorkbench().getOperationSupport(); IOperationHistory operationHistory = operationSupport.getOperationHistory(); IStatus status = operationHistory.execute(undoableOperation, null, null); if (!status.isOK()) { // handle the error }
Undo operation
IWorkbenchOperationSupport operationSupport = PlatformUI.getWorkbench().getOperationSupport(); IOperationHistory operationHistory = operationSupport.getOperationHistory(); IStatus status = operationHistory.undo(undoableOperation, null, null); if (!status.isOK()) { // handle the error }
Redo operation
IWorkbenchOperationSupport operationSupport = PlatformUI.getWorkbench().getOperationSupport(); IOperationHistory operationHistory = operationSupport.getOperationHistory(); IStatus status = operationHistory.redo(undoableOperation, null, null); if (!status.isOK()) { // handle the error }