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Rapid Application Design with the ROOT GUI Classes

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. Overview. Main Features Benefits from Using CINT Application Design Signals & Slots

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Rapid Application Design with the ROOT GUI Classes

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  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

  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

  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] 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)); fMain->AddFrame(fGframe, new TGLayoutHints(kLHintsExpandX, 2, 2, 1, 1)); … // 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 = new TGTextEntry(fGframe, new TGTextBuffer(100)); 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

  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

  6. Signals & Slots • 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) I. Antcheva ACAT07 NIKEF, Amsterdam

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

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

  9. // 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); C++ Code Generation • Using ctrl+S any GUI can be savedas a C++ macro file thanks to the SavePrimitive methods implemented in all GUI classes. • The generated macro can be modified and executed • It restores the complete original GUI and all existing signal/slot connections root [0] .x example.C I. Antcheva ACAT07 NIKEF, Amsterdam

  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

  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

  12. Complex Dialogs I. Antcheva ACAT07 NIKEF, Amsterdam

  13. GUI Builder • 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) I. Antcheva ACAT07 NIKEF, Amsterdam

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

  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 ROOT + I. Antcheva ACAT07 NIKEF, Amsterdam

  16. Conclusions • 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 • 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

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