tesseract::SVPaint Class Reference

Inheritance diagram for tesseract::SVPaint:

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

Detailed Description

Definition at line 40 of file svpaint.cpp.

Constructor & Destructor Documentation

SVPaint()

tesseract::SVPaint::SVPaint ( const char *  server_name )

explicit

Definition at line 188 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 tesseract::SVPaint::Notify ( const SVEvent *  sv_event )

overridevirtual

Reimplemented from tesseract::SVEventHandler.

Definition at line 173 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);
  }
  // throw other events away
}

---

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

• /media/home/debian/src/github/tesseract-ocr/tesseract/src/svpaint.cpp