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TGTableLayout.h
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1 // @(#)root/gui:$Id$
2 // Author: Brett Viren 04/15/2001
3 
4 /*************************************************************************
5  * Copyright (C) 2001, Brett Viren *
6  * All rights reserved. *
7  * *
8  * For the licensing terms see $ROOTSYS/LICENSE. *
9  * For the list of contributors see $ROOTSYS/README/CREDITS. *
10  *************************************************************************/
11 
12 #ifndef ROOT_TGTableLayout
13 #define ROOT_TGTableLayout
14 
15 #include "TGLayout.h"
16 
17 
18 // extension of ELayoutHints
19 enum ETableLayoutHints {
20  kLHintsShrinkX = BIT(8),
21  kLHintsShrinkY = BIT(9),
22  kLHintsFillX = BIT(10),
23  kLHintsFillY = BIT(11)
24 };
25 
26 
27 //////////////////////////////////////////////////////////////////////////
28 // //
29 // TGTableLayoutHints //
30 // //
31 // This class describes layout hints used by the TGTableLayout class. //
32 // //
33 //////////////////////////////////////////////////////////////////////////
34 
35 class TGTableLayoutHints : public TGLayoutHints {
36 
37 private:
38  TGTableLayoutHints(const TGTableLayoutHints&); // Not implemented
39  TGTableLayoutHints& operator=(const TGTableLayoutHints&); // Not implemented
40 
41 protected:
42  UInt_t fAttachLeft; // Column/row division number on which
43  UInt_t fAttachRight; // to attach the frame. Starts at 0
44  UInt_t fAttachTop; // and goes to # columns / # rows
45  UInt_t fAttachBottom; // respectively
46 
47 public:
48  TGTableLayoutHints(UInt_t attach_left, UInt_t attach_right,
49  UInt_t attach_top, UInt_t attach_bottom,
50  ULong_t hints = kLHintsNormal,
51  UInt_t padleft = 0, UInt_t padright = 0,
52  UInt_t padtop = 0, UInt_t padbottom = 0)
53  : TGLayoutHints(hints,padleft,padright,padtop,padbottom),
54  fAttachLeft(attach_left),
55  fAttachRight(attach_right),
56  fAttachTop(attach_top),
57  fAttachBottom(attach_bottom) { }
58  virtual ~TGTableLayoutHints() { }
59 
60  UInt_t GetAttachLeft() const { return fAttachLeft; }
61  UInt_t GetAttachRight() const { return fAttachRight; }
62  UInt_t GetAttachTop() const { return fAttachTop; }
63  UInt_t GetAttachBottom() const { return fAttachBottom; }
64  virtual void SavePrimitive(std::ostream &out, Option_t * = "");
65 
66  ClassDef(TGTableLayoutHints,0) // Class describing GUI table layout hints
67 };
68 
69 
70 //////////////////////////////////////////////////////////////////////////
71 // //
72 // TGTableLayout //
73 // //
74 // A LayoutManager which places child frames in a table. This uses //
75 // TGTableLayoutHints (not TGLayoutHints). See TGTableLayoutHints //
76 // for how to use these. This manager works like TGMatrixLayout with //
77 // the addition that: //
78 // - Child frames can span more than one column/row. //
79 // - Child frames can resize with the frame. //
80 // - Column and row sizes are not fixed nor (optionally) homogeneous. //
81 // - The number of columns and rows must be fully specified. //
82 // //
83 //////////////////////////////////////////////////////////////////////////
84 
85 class TGTableLayout : public TGLayoutManager {
86 
87 private:
88  TGTableLayout(const TGTableLayout&); // Not implemented
89  TGTableLayout& operator=(const TGTableLayout&); // Not implemented
90 
91 protected:
92  struct TableData_t {
93  UInt_t fDefSize; // Default size of col/rows
94  UInt_t fRealSize; // Real size of col/rows (eg, if table resize)
95  Bool_t fNeedExpand;
96  Bool_t fNeedShrink;
97  Bool_t fExpand;
98  Bool_t fShrink;
99  Bool_t fEmpty;
100  };
101  TableData_t *fRow; // info about each row
102  TableData_t *fCol; // info about each column
103  TGCompositeFrame *fMain; // container frame
104  TList *fList; // list of frames to arrange
105  Bool_t fHomogeneous; // all cols/rows same size
106 
107  void FindRowColSizes();
108  void FindRowColSizesInit();
109  void FindRowColSizesHomogeneous();
110  void FindRowColSizesSinglyAttached();
111  void FindRowColSizesMultiplyAttached();
112 
113  void SetRowColSizes();
114  void SetRowColSizesInit();
115 
116  void CheckSanity();
117 
118  static void SetRowColResize(UInt_t real_size, UInt_t nthings,
119  TableData_t *thing, Bool_t homogeneous);
120 
121 public:
122  // these are public in TGMatrixLayout ??? Perpetuate it.
123  Int_t fSep; // interval between frames
124  Int_t fHints; // layout hints (currently not used)
125  UInt_t fNrows; // number of rows
126  UInt_t fNcols; // number of columns
127 
128  TGTableLayout(TGCompositeFrame *main, UInt_t nrows, UInt_t ncols,
129  Bool_t homogeneous = kFALSE, Int_t sep = 0, Int_t hints = 0);
130  virtual ~TGTableLayout();
131 
132  virtual void Layout();
133  virtual TGDimension GetDefaultSize() const; // return sum of all child sizes
134  virtual void SavePrimitive(std::ostream &out, Option_t * = "");
135 
136  ClassDef(TGTableLayout,0) // Table layout manager
137 };
138 
139 #endif