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MyCommand.cpp
Package: MiniCAD_ALL.zip　[view]
Upload User: netltd
Upload Date: 2013-02-12
Package Size: 7234k
Code Size: 2k
Category:

Graph Drawing

Development Platform:

Visual C++

MyCommand.cpp：Code Content
  1. #include "stdafx.h"
  2. #include "MyDefine.h"
  3. #include "MyCommand.h"
  4. //////////////////////////////////////////////////////////////////////////////////////////////
  5. CCommandStruct::CCommandStruct(int command, int num, int* object, int* index)
  6. {
  7. ASSERT(num > 0);
  9. int i;
  10. m_command = command;
  11. m_num = num;
  12. m_object = new int[m_num];
  13. m_index = new int[m_num];
  15. for(i=0; i<m_num; i++)
  16. {
  17. m_object[i] = object[i];
  18. m_index[i] = index[i];
  19. }
  20. }
  22. CCommandStruct::~CCommandStruct()
  23. {
  24. delete m_object;
  25. delete m_index;
  26. }
  27. //////////////////////////////////////////////////////////////////////////////////////////////
  28. IMPLEMENT_DYNCREATE(CCommandStack, CObject)
  30. CCommandStack::CCommandStack()
  31. {
  32. CommandPointer = -1;   //命令指针
  34. }
  36. CCommandStack::~CCommandStack()
  37. {
  38. int index = m_CommandArray.GetSize();
  40. while(index--)
  41. delete (CCommandStruct*)m_CommandArray.GetAt(index);
  42. m_CommandArray.RemoveAll();
  43. }
  45. void CCommandStack::PushCommand(int command, int num, int* object, int* index)
  46. {
  47.    ASSERT(num >= 0);
  48.    CCommandStruct* pCommand;
  49.    
  50.    DelCommandFrom(CommandPointer + 1);
  52.    pCommand = new CCommandStruct(command, num, object, index);
  53.    m_CommandArray.Add(pCommand);
  54.    CommandPointer++;
  55. }
  57. void CCommandStack::RemoveAll()
  58. {
  59. for(int index = 0; index < m_CommandArray.GetSize(); index++)
  60. delete (CCommandStack*)m_CommandArray.GetAt(index);
  62. m_CommandArray.RemoveAll();
  63. }
  65. CCommandStruct* CCommandStack::Undo()
  66. {
  67. ASSERT(CommandPointer > -1 && CommandPointer < m_CommandArray.GetSize());
  68. if(CommandPointer == -1)
  69. return NULL;
  70. CCommandStruct* pCommand;
  71. pCommand = (CCommandStruct*)m_CommandArray.GetAt(CommandPointer);
  72. CommandPointer--;
  73. return pCommand;
  74. }
  76. CCommandStruct* CCommandStack::Redo()
  77. {
  78. if(CommandPointer >= m_CommandArray.GetSize())
  79. return NULL;
  80. CCommandStruct* pCommand;
  81. CommandPointer++;
  82. pCommand = (CCommandStruct*)m_CommandArray.GetAt(CommandPointer);
  83. return pCommand;
  84. }
  87. void CCommandStack::DelCommandFrom(int index)
  88. {
  89. ASSERT(index >= 0);
  90. while(index < m_CommandArray.GetSize())
  91. {
  92. delete (CCommandStruct*)m_CommandArray.GetAt(index);
  93. m_CommandArray.RemoveAt(index);
  94. }
  95. }
  97. BOOL CCommandStack::CanUndo()
  98. {
  99. if(m_CommandArray.GetSize() > 0 && CommandPointer > -1)
  100. return TRUE;
  101. else
  102. return FALSE;
  103. }
  105. BOOL CCommandStack::CanRedo()
  106. {
  107. if(m_CommandArray.GetSize() > 0 && CommandPointer < m_CommandArray.GetUpperBound())
  108. return TRUE;
  109. else
  110. return FALSE;
  111. }