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39 lines
1.6 KiB
39 lines
1.6 KiB
15 years ago
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Problem:
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When working with the transform tool, the user performs many adjustments.
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These adjustments should be aggregated into one transform, and always
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performed from the original state of the image, as it was before the
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first transformation adjustment was applied -- because otherwise
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the quality degradation becomes too bad.
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That means that all work with the transform tool should eventually
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result in one transform command. However, when working with the transform
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tool, the user expects to be able to undo various stages of his transform
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actions. And undo should not undo to the original state, but to the previous
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state.
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When the user selects another tool, the definitive transform is applied.
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This happens because selecting another tool calls the clear function of
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the transform tool. One transform command should end up on the undo
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stack.
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When the user selects an action from the menu, like a filter,
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the definitive transform should also be applied, and only
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then the action from the menu.
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Thus, we have two problems:
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* Transforms should always be done from the original image, but undoing
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the transform command should unto to the previous state.
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* Pending transforms should be committed before a menu action is taken.
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These problems can be solved in one go, without any of the complications
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I created yesterday by always committing the transform to the undo history
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in the transform() method, but by performing the transform from the original
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paint device, as it was when the tool got activated.
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Menu actions should reset the tool: for this we will need my complicated hack,
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I propose resetting the transform tool after a command is added.
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