00001 // @(#)root/gui:$Id: TGXYLayout.h 23115 2008-04-10 13:35:37Z rdm $ 00002 // Author: Reiner Rohlfs 24/03/2002 00003 00004 /************************************************************************* 00005 * Copyright (C) 1995-2002, Rene Brun, Fons Rademakers and Reiner Rohlfs * 00006 * All rights reserved. * 00007 * * 00008 * For the licensing terms see $ROOTSYS/LICENSE. * 00009 * For the list of contributors see $ROOTSYS/README/CREDITS. * 00010 *************************************************************************/ 00011 00012 ////////////////////////////////////////////////////////////////////////// 00013 // // 00014 // TGXYLayout // 00015 // // 00016 // Is a layout manager where the position and the size of each widget // 00017 // in the frame are defined by X / Y - coordinates. The coordinates // 00018 // for each widget are defined by the TGXYLayoutHints. Therefore it // 00019 // is not possible to share a layout hint for several widgets. // 00020 // // 00021 // The coordinates (X, Y) and the size (W, H) are defined in units // 00022 // of the size of a typical character. Also the size of the // 00023 // TGCompositeFrame for which a TGXYLayout manager is used has to be // 00024 // defined in its constructor in units of the size of a character! // 00025 // // 00026 // It is not possible to use any other layout hint than the // 00027 // TGXYLayoutHints for this layout manager! // 00028 // // 00029 // The rubberFlag in the constructor of the TGLXYLayoutHints defines // 00030 // how the position and the size of a widget is recalculated if the // 00031 // size of the frame is increased: // 00032 // - kLRubberX: The X - position (left edge) is increased by the same // 00033 // factor as the width of the frame increases. // 00034 // - kLRubberY: The Y - position (upper edge) is increased by the same // 00035 // factor as the height of the frame increases. // 00036 // - kLRubberW: The width of the widget is increased by the same // 00037 // factor as the width of the frame increases. // 00038 // - kLRubberY: The height of the widget is increased by the same // 00039 // factor as the height of the frame increases. // 00040 // But the size never becomes smaller than defined by the // 00041 // TGXYLayoutHints and the X and Y coordinates becomes never smaller // 00042 // than defined by the layout hints. // 00043 // // 00044 // TGXYLayoutHints // 00045 // // 00046 // This layout hint must be used for the TGXYLouyout manager! // 00047 // // 00048 // // 00049 // Example how to use this layout manager: // 00050 // // 00051 // TGMyFrame::TGMyFrame() // 00052 // : TGMainFrame(gClient->GetRoot(), 30, 12) // 00053 // // frame is 30 characters wide and 12 characters high // 00054 // { // 00055 // SetLayoutManager(new TGXYLayout(this)); // 00056 // // 00057 // // create a button of size 8 X 1.8 at position 20 / 1 // 00058 // TGTextButton * button; // 00059 // button = new TGTextButton(this, "&Apply", 1); // 00060 // AddFrame(button, new TGXYLayoutHints(20, 1, 8, 1.8)); // 00061 // // 00062 // // create a listbox of size 18 X 10 at position 1 / 1. // 00063 // // The height will increase if the frame height increases // 00064 // TGListBox *listBox; // 00065 // listBox = new TGListBox(this, 2); // 00066 // AddFrame(listBox, new TGXYLayoutHints(1, 1, 18, 10, // 00067 // TGXYLayoutHints::kLRubberX | // 00068 // TGXYLayoutHints::kLRubberY | // 00069 // TGXYLayoutHints::kLRubberH)); // 00070 // . // 00071 // . // 00072 // . // 00073 // } // 00074 // // 00075 // Normaly there is one layout hint per widget. Therefore these // 00076 // can be deleted like in the following example in the desctuctor // 00077 // of the frame: // 00078 // // 00079 // TGMyFrame::~TGMyFrame() // 00080 // { // 00081 // // Destructor, deletes all frames and their layout hints. // 00082 // // 00083 // // delete all frames and layout hints // 00084 // Cleanup(); // 00085 // } // 00086 // // 00087 ////////////////////////////////////////////////////////////////////////// 00088 00089 #ifndef ROOT_TGXYLayout 00090 #define ROOT_TGXYLayout 00091 00092 #ifndef ROOT_TGLayout 00093 #include "TGLayout.h" 00094 #endif 00095 00096 00097 class TGXYLayoutHints : public TGLayoutHints { 00098 00099 protected: 00100 Double_t fX; // x - position of widget 00101 Double_t fY; // y - position of widget 00102 Double_t fW; // width of widget 00103 Double_t fH; // height of widget 00104 UInt_t fFlag; // rubber flag 00105 00106 public: 00107 00108 enum ERubberFlag { 00109 kLRubberX = BIT(0), 00110 kLRubberY = BIT(1), 00111 kLRubberW = BIT(2), 00112 kLRubberH = BIT(3) 00113 }; 00114 00115 TGXYLayoutHints(Double_t x, Double_t y, Double_t w, Double_t h, 00116 UInt_t rubberFlag = kLRubberX | kLRubberY); 00117 00118 Double_t GetX() const { return fX; }; 00119 Double_t GetY() const { return fY; }; 00120 Double_t GetW() const { return fW; }; 00121 Double_t GetH() const { return fH; }; 00122 UInt_t GetFlag() const { return fFlag; }; 00123 00124 void SetX(Double_t x) { fX = x; } 00125 void SetY(Double_t y) { fY = y; } 00126 void SetW(Double_t w) { fW = w; } 00127 void SetH(Double_t h) { fH = h; } 00128 void SetFlag(UInt_t flag) { fFlag = flag; } 00129 00130 virtual void SavePrimitive(ostream &out, Option_t * = ""); 00131 00132 ClassDef(TGXYLayoutHints,0) // Hits for the X / Y - layout manager 00133 }; 00134 00135 00136 class TGXYLayout : public TGLayoutManager { 00137 00138 protected: 00139 TList *fList; // list of frames to arrange 00140 TGCompositeFrame *fMain; // container frame 00141 00142 Bool_t fFirst; // flag to determine the first call of Layout() 00143 UInt_t fFirstWidth; // original width of the frame fMain 00144 UInt_t fFirstHeight; // original height of the fram fMain 00145 00146 Int_t fTWidth; // text width of a default character "1234567890" / 10 00147 Int_t fTHeight; // text height 00148 00149 TGXYLayout(const TGXYLayout&); 00150 TGXYLayout& operator=(const TGXYLayout&); 00151 00152 public: 00153 TGXYLayout(TGCompositeFrame *main); 00154 00155 virtual void Layout(); 00156 virtual TGDimension GetDefaultSize() const; 00157 virtual void SavePrimitive(ostream &out, Option_t * = ""); 00158 00159 void NewSize() { fFirst = kTRUE; } 00160 00161 ClassDef(TGXYLayout,0) // X / Y - layout manager 00162 }; 00163 00164 #endif
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