src/apps/haikudepot/textview/TextListener.h

   1 /*
   2  * Copyright 2014, Stephan Aßmus <superstippi@gmx.de>.
   3  * All rights reserved. Distributed under the terms of the MIT License.
   4  */
   5 #ifndef TEXT_LISTENER_H
   6 #define TEXT_LISTENER_H
   7
   8
   9 #include <Referenceable.h>
  10
  11
  12 class TextChangeEvent {
  13 protected:
  14                                                                 TextChangeEvent();
  15                                                                 TextChangeEvent(int32 firstChangedParagraph,
  16                                                                         int32 changedParagraphCount);
  17         virtual                                         ~TextChangeEvent();
  18
  19 public:
  20                         int32                           FirstChangedParagraph() const
  21                                                                         { return fFirstChangedParagraph; }
  22                         int32                           ChangedParagraphCount() const
  23                                                                         { return fChangedParagraphCount; }
  24
  25 private:
  26                         int32                           fFirstChangedParagraph;
  27                         int32                           fChangedParagraphCount;
  28 };
  29
  30
  31 class TextChangingEvent : public TextChangeEvent {
  32 public:
  33                                                                 TextChangingEvent(int32 firstChangedParagraph,
  34                                                                         int32 changedParagraphCount);
  35         virtual                                         ~TextChangingEvent();
  36
  37                         void                            Cancel();
  38                         bool                            IsCanceled() const
  39                                                                         { return fIsCanceled; }
  40
  41 private:
  42                                                                 TextChangingEvent();
  43
  44 private:
  45                         bool                            fIsCanceled;
  46 };
  47
  48
  49 class TextChangedEvent : public TextChangeEvent {
  50 public:
  51                                                                 TextChangedEvent(int32 firstChangedParagraph,
  52                                                                         int32 changedParagraphCount);
  53         virtual                                         ~TextChangedEvent();
  54
  55 private:
  56                                                                 TextChangedEvent();
  57 };
  58
  59
  60 class TextListener : public BReferenceable {
  61 public:
  62                                                                 TextListener();
  63         virtual                                         ~TextListener();
  64
  65         virtual void                            TextChanging(TextChangingEvent& event);
  66
  67         virtual void                            TextChanged(const TextChangedEvent& event);
  68 };
  69
  70
  71 typedef BReference<TextListener> TextListenerRef;
  72
  73
  74 #endif // TEXT_LISTENER_H