Rapid Application Design with the ROOT GUI Classes

Transcription

1 Rapid Application Design with the ROOT GUI Classes Ilka Antcheva, Bertrand Bellenot, René Brun, Fons Rademakers, Valeriy Onuchin * CERN, Geneva, Switzerland * IHEP, Protvino, Russia 24 April 2007

2 Overview Main Features Benefits from Using CINT Application Design Signals & Slots Scripting C++ Code Generation Dialogs GUI Builder Automatic Context Menus External Applications Conclusions I. Antcheva ACAT07 NIKEF, Amsterdam 2

3 Main Features ROOT GUI classes form a rich and complete set of widgets Fully cross platform with the same look and feel on either Unix, Linux, Windows and Mac OS X Fully scriptable allowing fast prototyping via the embedded CINT C++ interpreter The GUI builder (under development) makes the task of designing complex GUI s easier and faster High level GUI s in ROOT : the browser, tree viewer, graphics editor, fit panel, session viewer of PROOF, etc. I. Antcheva ACAT07 NIKEF, Amsterdam 3

4 Benefits from Using CINT Prototyping via the CINT C++ interpreter Supports from simple sequence of statements to complex C++ class and method definitions Remove edit compile cycle Macros can be edited and re-executed Transparent interface to native C++ compiler to run macro with native machine performance root [0].x mydialog.c root [1].x mydialog.c // ftext = new TGTextEntry(fMain, new TGTextBuffer(100)); // ftext->settooltiptext("enter the label and hit Enter key"); // ftext->connect("returnpressed()", "MyDialog", this, "DoSetlabel()"); // fmain->addframe(ftext, new TGLayoutHints(kLHintsTop klhintsleft, 5, 5, 5, 5)); fgframe = new TGGroupFrame(fMain, "Last File"); flabel = new TGLabel(fGframe, "No Intut "); fgframe->addframe(flabel, new TGLayoutHints(kLHintsTop klhintsleft, 5, 5, 5, 5)); ftext fmain->addframe(fgframe, = new TGTextEntry(fGframe, new TGLayoutHints(kLHintsExpandX, new TGTextBuffer(100)); 2, 2, 1, 1)); ftext->settooltiptext("enter the label and hit Enter key"); ftext->connect("returnpressed()", "MyDialog", this, "DoSetlabel()"); ftext->resize(150, ftext->getdefaultheight()); fgframe->addframe(ftext, new TGLayoutHints(kLHintsTop klhintsleft, 5, 5, 5, 5)); fmain->addframe(fgframe, new TGLayoutHints(kLHintsExpandX, 2, 2, 1, 1)); I. Antcheva ACAT07 NIKEF, Amsterdam 4

5 Application Design Map user requirements and logically organize the GUI Application window is handled by TGMainFrame Select widgets from ROOT GUI classes Layout the GUI components Parent-children relationship Different layout managers Program them to perform actions Signal/slot mechanism Conventional model of event processing Run and validate or iterate to improve I. Antcheva ACAT07 NIKEF, Amsterdam 5

6 Signal/Slot communication mechanism is integrated into ROOT core by TQObject, TQConnection, TQClass Uses dictionary information and the CINT interpreter to connect signal methods to slot methods Total independence of the interacting classes (easy programming) Signals & Slots I. Antcheva ACAT07 NIKEF, Amsterdam 6

7 Scripting Macros via the ROOT Object Browser I. Antcheva ACAT07 NIKEF, Amsterdam 7

8 More Scripting TGTextEditor - basic editor for compiling and executing macros Drag & Drop macros from the browser I. Antcheva ACAT07 NIKEF, Amsterdam 8

9 Using ctrl+s any GUI can be saved as a C++ macro file thanks to the SavePrimitive methods implemented in all GUI classes. The generated macro can be modified and executed C++ Code Generation It restores the complete original GUI and all existing signal/slot connections root [0].x example.c // transient frame TGTransientFrame *frame2 = new TGTransientFrame(gClient->GetRoot(),760,590); // group frame TGButtonGroupe *frame3 = new TGGroupFrame(frame2, Operation"); TGRadioButton *frame4 = new TGRadioButton(frame3, Nop",10); frame3->addframe(frame4); I. Antcheva ACAT07 NIKEF, Amsterdam 9

10 Dialogs Standard set of common dialogs Input dialog Message window Search dialog Print dialog Files selection (multiple files) TGFileInfo fi; new TGFileDialog(fClient->GetDefaultRoot(), this, kfdopen,&fi); if (fi.fmultipleselection && fi.ffilenameslist) { TObjString *el; TIter next(fi.ffilenameslist); while ((el = (TObjString *) next())) { new TFile(el->GetString(), "update"); } } else if (fi.ffilename) { new TFile(fi.fFilename, "update"); } I. Antcheva ACAT07 NIKEF, Amsterdam 10

11 More Dialogs // Change background color via color selector. TGFrame *fr; TGColorDialog *cd = GetGlobalColorDialog(); cd->setcurrentcolor(fr->getbackground()); cd->connect("colorselected(pixel_t)", "TGFrame", fr, ChangeBackground(Pixel_t)"); fclient->waitforunmap(cd); TQObject::Disconnect(cd); // Change text font via font selection dialog. TGGroupFrame *gfr; TGFontDialog *fd = GetGlobalFontDialog(); TGResourcePool *rc = gc=fclient->getresourcepool(); TGGC *gc = rc->getgcpool()->findgc(fr->getnormgc()); TGFont *font = 0; Font = rc->getfontpool()->findfont(fr->getfontstruct()); fd->setcolor(gc->getforeground()); fd->setfont(font); fd->connect("fontselected(char*)", "TGGroupFrame", gfr, "SetTextFont(char*)"); fd->connect("colorselected(pixel_t)", "TGGroupFrame", gfr, "SetTextColor(Pixel_t)"); fclient->waitforunmap(fd); TQObject::Disconnect(fd); I. Antcheva ACAT07 NIKEF, Amsterdam 11

12 Complex Dialogs I. Antcheva ACAT07 NIKEF, Amsterdam 12

13 Visual design without coding Design process Mainly based on Drag & Drop Flexible layout settings Ends up as C++ source code reflecting parents-children relationship Establish signal/slot connections and their concrete implementation (to be done) GUI Builder I. Antcheva ACAT07 NIKEF, Amsterdam 13

14 Context sensitive popup menu Automatically generated by ROOT Gives direct access to class member functions Any context menu can be retrieved TClass *cl = Graph->IsA(); TList *mnl = cl->getmenulist(); Can be extended with userdefined entries Automatic Context Menus I. Antcheva ACAT07 NIKEF, Amsterdam 14

15 External Applications TCanvas can be embedded into any 3rd party GUI environment when it is possible to: Obtain a Window ID (XID on X11, HWND on Windows) Create a timer to handle ROOT events Forward events to the ROOT canvas I. Antcheva ACAT07 NIKEF, Amsterdam 15

16 The ROOT GUI classes form a rich and powerful scriptable cross-platform GUI library Solid basis for the development of additional GUIs: help browser, object editors, fit panel, event displays The GUI builder makes designing GUIs easier Conclusions Easy application distribution by storing the GUIs with data in the same ROOT file The future - to provide users with access through multiple interfaces from any location, with any device at any time. I. Antcheva ACAT07 NIKEF, Amsterdam 16