library: libGui #include "TGXYLayout.h"

# TGXYLayoutHints

class description - source file - inheritance tree (.pdf)

## class TGXYLayoutHints : public TGLayoutHints

| Inheritance Chart:

`TObject`

`TRefCnt`

<-

`TGLayoutHints`

<-

`TGXYLayoutHints`

        public:

                           TGXYLayoutHints(Double_t x, Double_t y, Double_t w, Double_t h, UInt_t rubberFlag = kLRubberX|kLRubberY)
                           TGXYLayoutHints(const TGXYLayoutHints&)
                           ~TGXYLayoutHints()
            static TClass* Class()
                    UInt_t GetFlag() const
                  Double_t GetH() const
                  Double_t GetW() const
                  Double_t GetX() const
                  Double_t GetY() const
           virtual TClass* IsA() const
          TGXYLayoutHints& operator=(const TGXYLayoutHints&)
                      void SetFlag(UInt_t flag)
                      void SetH(Double_t h)
                      void SetW(Double_t w)
                      void SetX(Double_t x)
                      void SetY(Double_t y)
              virtual void ShowMembers(TMemberInspector& insp, char* parent)
              virtual void Streamer(TBuffer& b)
                      void StreamerNVirtual(TBuffer& b)

### Data Members

        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:

          static const TGXYLayoutHints::ERubberFlag kLRubberX
          static const TGXYLayoutHints::ERubberFlag kLRubberY
          static const TGXYLayoutHints::ERubberFlag kLRubberW
          static const TGXYLayoutHints::ERubberFlag kLRubberH

## Class Description

     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 TGLXYLayoutHins 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 character long and 12 character heigh
     {
        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.

        TGFrameElement *ptr;

        // delete all frames and layout hints
        if (fList) {
           TIter next(fList);
           while ((ptr = (TGFrameElement *) next())) {
              if (ptr->fLayout)
                 delete ptr->fLayout;
              if (ptr->fFrame)
                 delete ptr->fFrame;
           }
        }
     }

TGXYLayoutHints(Double_t x, Double_t y, Double_t w, Double_t h, UInt_t rubberFlag) : TGLayoutHints(kLHintsNormal, 0,0,0,0)

     Constructor. The x, y, w and h define the position of the widget in
     its frame and the size of the widget. The unit is the size of a
     character. The rubberFlag defines how to move and to resize the
     widget when the frame is resized. Default is moving the X and Y
     position but keep the size of the widget.

### Inline Functions

                        void ~TGXYLayoutHints()
                    Double_t GetX() const
                    Double_t GetY() const
                    Double_t GetW() const
                    Double_t GetH() const
                      UInt_t GetFlag() const
                        void SetX(Double_t x)
                        void SetY(Double_t y)
                        void SetW(Double_t w)
                        void SetH(Double_t h)
                        void SetFlag(UInt_t flag)
                     TClass* Class()
                     TClass* IsA() const
                        void ShowMembers(TMemberInspector& insp, char* parent)
                        void Streamer(TBuffer& b)
                        void StreamerNVirtual(TBuffer& b)
             TGXYLayoutHints TGXYLayoutHints(const TGXYLayoutHints&)
            TGXYLayoutHints& operator=(const TGXYLayoutHints&)

Author: Reiner Rohlfs 24/03/2002
Last update: root/gui:$Name: $:$Id: TGXYLayout.cxx,v 1.1 2002/08/08 16:54:11 rdm Exp $
Copyright (C) 1995-2001, Rene Brun, Fons Rademakers and Reiner Rohlfs *