Paint programm in c++
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کد پروژه: 258121
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We are going to implement the command pattern with the following requirements:
- Any time a pixel is modified, it must be as a command.
- Each command must be processed through some intermediate data structure (e.g. a queue, stack, list, vector, tree, or whatever makes sense--you need to decide).
- A history of the commands executed should be kept for at least the last or previous 10 commands (though there need not be a limit, 10 is an arbitrary number, but ideally you can handle 1000s), such that a user can 'undo' (at least 10 times) with by pressing the 'z' key and redo by pressing the 'y' key (at least 10 times).
- Note undo/redo function should emulate a painting program.
- i.e. I can only do a 'redo' after doing an 'undo'. If I do a new command, I can no longer redo.
- Executing the same command twice in a row should not be recorded. Think of this as a performance optimization where you are not changing the same pixel to the same color twice in a row.
- Consider implementing
operator==so you can determine if two commands were the same.
- Consider implementing
- Modifying a pixel should only be done when pressing the 'left mouse key'
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