TGtk4Canvas.h

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// Author: Sergey Linev, GSI   12/08/2026
 
/*************************************************************************
 * Copyright (C) 1995-2026, Rene Brun and Fons Rademakers.               *
 * All rights reserved.                                                  *
 *                                                                       *
 * For the licensing terms see $ROOTSYS/LICENSE.                         *
 * For the list of contributors see $ROOTSYS/README/CREDITS.             *
 *************************************************************************/
 
#ifndef ROOT_TGtk4Canvas
#define ROOT_TGtk4Canvas
 
#include "TCanvasImp.h"
 
class Gtk4CanvasWindow;
class Gtk4DrawArea;
 
namespace ROOT {
namespace Experimental {
 
 
class TGtk4Canvas : public TCanvasImp {
 
protected:
 
   Gtk4CanvasWindow *fCanvasWindow = nullptr;
   Gtk4DrawArea *fDrawArea = nullptr;
 
   Bool_t fFixedSize = kFALSE;      ///<! true when fixed-size canvas is configured
   UInt_t fClientBits = 0;          ///<! latest status bits from client like editor visible or not
 
   Bool_t PerformUpdate(Bool_t async) override;
   TVirtualPadPainter *CreatePadPainter() override;
 
   void AssignStatusBits(UInt_t bits);
 
 
public:
   TGtk4Canvas(TCanvas *c, const char *name, Int_t x, Int_t y, UInt_t width, UInt_t height);
   ~TGtk4Canvas() override;
 
   Gtk4DrawArea *GetDrawArea() const { return fDrawArea; }
 
   Int_t InitWindow() override;
   void Close() override;
   void Show() override;
 
   UInt_t GetWindowGeometry(Int_t &x, Int_t &y, UInt_t &w, UInt_t &h) override;
   void GetCanvasGeometry(Int_t wid, UInt_t &w, UInt_t &h) override;
   void ResizeCanvasWindow(Int_t) override {}
   void UpdateDisplay(Int_t = 0, Bool_t = kFALSE) override {}
 
   void ShowMenuBar(Bool_t = kTRUE) override { }
   void ShowStatusBar(Bool_t = kTRUE) override { }
   void ShowEditor(Bool_t = kTRUE) override {  }
   void ShowToolBar(Bool_t = kTRUE) override { }
   void ShowToolTips(Bool_t  = kTRUE) override { }
 
   void ForceUpdate() override;
 
   void SetWindowPosition(Int_t x, Int_t y) override;
   void SetWindowSize(UInt_t w, UInt_t h) override;
   void SetWindowTitle(const char *newTitle) override;
   void SetCanvasSize(UInt_t w, UInt_t h) override;
   void SetCursor(ECursor cursor) override;
   void Iconify() override;
   void RaiseWindow() override;
 
   Bool_t HasEditor() const override;
   Bool_t HasMenuBar() const override;
   Bool_t HasStatusBar() const override;
   Bool_t HasToolBar() const override { return kFALSE; }
   Bool_t HasToolTips() const override;
 
   static TCanvasImp *NewCanvas(TCanvas *c, const char *name, Int_t x, Int_t y, UInt_t width, UInt_t height);
 
   ClassDefOverride(TGtk4Canvas, 0) // Gtk4 implementation for TCanvasImp
};
 
} // namespace Experimental
} // namespace ROOT
 
#endif