// @(#)root/gui:$Name: $:$Id: TGXYLayout.h,v 1.3 2006/05/23 04:47:38 brun Exp $ // Author: Reiner Rohlfs 24/03/2002 /************************************************************************* * Copyright (C) 1995-2002, Rene Brun, Fons Rademakers and Reiner Rohlfs * * All rights reserved. * * * * For the licensing terms see $ROOTSYS/LICENSE. * * For the list of contributors see $ROOTSYS/README/CREDITS. * *************************************************************************/ ////////////////////////////////////////////////////////////////////////// // // // TGXYLayout // // // // Is a layout manager where the position and the size of each widget // // in the frame are defined by X / Y - coordinates. The coordinates // // for each widget are defined by the TGXYLayoutHints. Therefore it // // is not possible to share a layout hint for several widgets. // // // // The coordinates (X, Y) and the size (W, H) are defined in units // // of the size of a typical character. Also the size of the // // TGCompositeFrame for which a TGXYLayout manager is used has to be // // defined in its constructor in units of the size of a character! // // // // It is not possible to use any other layout hint than the // // TGXYLayoutHints for this layout manager! // // // // The rubberFlag in the constructor of the TGLXYLayoutHints defines // // how the position and the size of a widget is recalculated if the // // size of the frame is increased: // // - kLRubberX: The X - position (left edge) is increased by the same // // factor as the width of the frame increases. // // - kLRubberY: The Y - position (upper edge) is increased by the same // // factor as the height of the frame increases. // // - kLRubberW: The width of the widget is increased by the same // // factor as the width of the frame increases. // // - kLRubberY: The height of the widget is increased by the same // // factor as the height of the frame increases. // // But the size never becomes smaller than defined by the // // TGXYLayoutHints and the X and Y coordinates becomes never smaller // // than defined by the layout hints. // // // // TGXYLayoutHints // // // // This layout hint must be used for the TGXYLouyout manager! // // // // // // Example how to use this layout manager: // // // // TGMyFrame::TGMyFrame() // // : TGMainFrame(gClient->GetRoot(), 30, 12) // // // frame is 30 characters wide and 12 characters high // // { // // SetLayoutManager(new TGXYLayout(this)); // // // // // create a button of size 8 X 1.8 at position 20 / 1 // // TGTextButton * button; // // button = new TGTextButton(this, "&Apply", 1); // // AddFrame(button, new TGXYLayoutHints(20, 1, 8, 1.8)); // // // // // create a listbox of size 18 X 10 at position 1 / 1. // // // The height will increase if the frame height increases // // TGListBox *listBox; // // listBox = new TGListBox(this, 2); // // AddFrame(listBox, new TGXYLayoutHints(1, 1, 18, 10, // // TGXYLayoutHints::kLRubberX | // // TGXYLayoutHints::kLRubberY | // // TGXYLayoutHints::kLRubberH)); // // . // // . // // . // // } // // // // Normaly there is one layout hint per widget. Therefore these // // can be deleted like in the following example in the desctuctor // // of the frame: // // // // TGMyFrame::~TGMyFrame() // // { // // // Destructor, deletes all frames and their layout hints. // // // // // delete all frames and layout hints // // Cleanup(); // // } // // // ////////////////////////////////////////////////////////////////////////// #ifndef ROOT_TGXYLayout #define ROOT_TGXYLayout #ifndef ROOT_TGLayout #include "TGLayout.h" #endif class TGXYLayoutHints : public TGLayoutHints { protected: Double_t fX; // x - position of widget Double_t fY; // y - position of widget Double_t fW; // width of widget Double_t fH; // height of widget UInt_t fFlag; // rubber flag public: enum ERubberFlag { kLRubberX = BIT(0), kLRubberY = BIT(1), kLRubberW = BIT(2), kLRubberH = BIT(3) }; TGXYLayoutHints(Double_t x, Double_t y, Double_t w, Double_t h, UInt_t rubberFlag = kLRubberX | kLRubberY); Double_t GetX() const { return fX; }; Double_t GetY() const { return fY; }; Double_t GetW() const { return fW; }; Double_t GetH() const { return fH; }; UInt_t GetFlag() const { return fFlag; }; void SetX(Double_t x) { fX = x; } void SetY(Double_t y) { fY = y; } void SetW(Double_t w) { fW = w; } void SetH(Double_t h) { fH = h; } void SetFlag(UInt_t flag) { fFlag = flag; } ClassDef(TGXYLayoutHints,0) // Hits for the X / Y - layout manager }; class TGXYLayout : public TGLayoutManager { protected: TList *fList; // list of frames to arrange TGCompositeFrame *fMain; // container frame Bool_t fFirst; // flag to determine the first call of Layout() UInt_t fFirstWidth; // original width of the frame fMain UInt_t fFirstHeight; // original height of the fram fMain Int_t fTWidth; // text width of a default character "1234567890" / 10 Int_t fTHeight; // text height TGXYLayout(const TGXYLayout&); TGXYLayout& operator=(const TGXYLayout&); public: TGXYLayout(TGCompositeFrame *main); virtual void Layout(); virtual TGDimension GetDefaultSize() const; void NewSize() { fFirst = kTRUE; } ClassDef(TGXYLayout,0) // X / Y - layout manager }; #endif