cinelerra/mainundo.h

   1 #ifndef MAINUNDO_H
   2 #define MAINUNDO_H
   3
   4
   5 #include "bctimer.inc"
   6 #include "linklist.h"
   7 #include "mwindow.inc"
   8
   9 #include <stdint.h>
  10
  11
  12 class UndoStackItem;
  13 class MainUndoStackItem;
  14
  15
  16 class MainUndo
  17 {
  18 public:
  19         MainUndo(MWindow *mwindow);
  20         ~MainUndo();
  21
  22    // Use this function for UndoStackItem subclasses with custom
  23    // undo and redo functions.  All fields including description must
  24    // be populated before calling this function.
  25    void push_undo_item(UndoStackItem *item);
  26
  27         void update_undo(char *description,
  28                 uint32_t load_flags,
  29                 void *creator = 0,
  30                 int changes_made = 1);
  31
  32 // alternatively, call this one after the change
  33         void push_state(char *description, uint32_t load_flags, void* creator);
  34
  35 // Used in undo and redo to reset the creators in all the records.
  36         void reset_creators();
  37
  38         int undo();
  39         int redo();
  40
  41 private:
  42         List<UndoStackItem> undo_stack;
  43         List<UndoStackItem> redo_stack;
  44         MainUndoStackItem* new_entry;   // for setting the after buffer
  45
  46         MWindow *mwindow;
  47         Timer *last_update;
  48         char* data_after;       // the state after a change
  49
  50         void capture_state();
  51         void prune_undo();
  52         bool ignore_push(char *description, uint32_t load_flags, void* creator);
  53
  54         friend class MainUndoStackItem;
  55 };
  56
  57 #endif