SVPaint Class Reference

Inheritance diagram for SVPaint:

Public Member Functions
	SVPaint (const char *server_name)
void	Notify (const SVEvent *sv_event)
Public Member Functions inherited from SVEventHandler
virtual	~SVEventHandler ()

Detailed Description

Definition at line 37 of file svpaint.cpp.

Constructor & Destructor Documentation

SVPaint()

SVPaint::SVPaint ( const char *  server_name )

explicit

Definition at line 179 of file svpaint.cpp.

                                        {
  window_ = new ScrollView("ScrollView Paint Example",  // window caption
                            0, 0,                       // x,y window position
                            500, 500,                   // window size
                                    500, 500,                   // canvas size
                            false,      // whether the Y axis is inversed.
                                        // this is included due to legacy 
                                        // reasons for tesseract and enables
                                        // us to have (0,0) as the LOWER left
                                        // of the coordinate system.
                            server_name);               // the server address.

  // Set the start modes to point-to-point and line drawing.
  click_mode_ = 1;
  drag_mode_ = 4;
  has_start_point_ = false;

  // Bild our menus and add them to the window. The flag illustrates whether
  // this is a menu bar.
  SVMenuNode* popup_menu = BuildPopupMenu();
  popup_menu->BuildMenu(window_,false);
        
  SVMenuNode* bar_menu = BuildMenuBar();
  bar_menu->BuildMenu(window_,true);

  // Set the initial color values to White (could also be done by
  // passing (rgb[0], rgb[1], rgb[2]).
  window_->Pen(ScrollView::WHITE);
  window_->Brush(ScrollView::WHITE);

  // Adds the event handler to the window. This actually ensures that Notify
  // gets called when events occur.
  window_->AddEventHandler(this);

  // Set the window visible (calling this is important to actually render
  // everything. Without this call, the window would also be drawn, but the
  // menu bars would be missing.
  window_->SetVisible(true);

  // Rest this thread until its window is destroyed.
  // Note that a special eventhandling thread was created when constructing
  // the window. Due to this, the application will not deadlock here.
  window_->AwaitEvent(SVET_DESTROY);
  // We now have 3 Threads running:
  // (1) The MessageReceiver thread which fetches messages and distributes them
  // (2) The EventHandler thread which handles all events for window_
  // (3) The main thread which waits on window_ for a DESTROY event (blocked)
}

Member Function Documentation

Notify()

void SVPaint::Notify ( const SVEvent *  sv_event )

virtual

Reimplemented from SVEventHandler.

Definition at line 169 of file svpaint.cpp.

                                            {
  if (sv_event->type == SVET_CLICK) { ClickHandler(sv_event); }  
  else if (sv_event->type == SVET_SELECTION) { SelectionHandler(sv_event); }
  else if (sv_event->type == SVET_MENU) { MenuBarHandler(sv_event); }
  else if (sv_event->type == SVET_POPUP) { PopupHandler(sv_event); }
  else {} //throw other events away
}

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The documentation for this class was generated from the following file:

• /home/stefan/src/github/tesseract-ocr/tesseract/viewer/svpaint.cpp