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LibGUI: Add GUndoStack and GCommand classes
This patch converts the undo stack from GTextDocument into GUndoStack, and GTextDocumentUndoCommand now inherits from GCommand. Let's turn this into a generic mechanism that can be used to implement undo/redo in any application. :^)
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7 changed files with 156 additions and 73 deletions
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@ -57,6 +57,8 @@ OBJS = \
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GAboutDialog.o \
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GModelSelection.o \
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GLazyWidget.o \
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GCommand.o \
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GUndoStack.o \
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GWindow.o
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LIBRARY = libgui.a
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