C++ PushState函数代码示例

/* virtual */ OP_STATUS
Google2011NetworkApiResponseParser::EnterObject()
{
	if (m_state_stack_size == 0)
		return PushState(MAIN_OBJECT);
	else if (m_state_stack_size == 2 && m_state_stack[1] == LOCATION)
		return PushState(LOCATION_OBJECT);
	else
		return PushState(UNKNOWN_OBJECT);
}

void AudioView::Cut()
{
  ClearClipboard();

  TrackList *tracks = GetTracks();
  VTrack *n = tracks->First();
  VTrack *dest = 0;

  while(n) {
	if (n->selected) {
	  n->Cut(sel0, sel1, &dest);
	  if (dest)
		clipboard->Add(dest);
	}
	n = tracks->Next();
  }

  clipLen = (sel1 - sel0);

  sel1 = sel0;

  PushState();

  FixScrollbars();
  REDRAW(trackPanel);
  REDRAW(rulerPanel);
  UpdateMenus();
}

void AudioView::Paste()
{
  if (sel0 != sel1)
    Clear();
    
  wxASSERT(sel0 == sel1);

  double tsel = sel0;

  TrackList *tracks = GetTracks();
  VTrack *n = tracks->First();
  VTrack *c = clipboard->First();

  while(n && c) {
	if (n->selected) {
	  n->Paste(tsel, c);
	  c = clipboard->Next();
	}
	  
	n = tracks->Next();
  }

  // TODO: What if we clicked past the end of the track?

  sel0 = tsel;
  sel1 = tsel + clipLen;

  PushState();

  FixScrollbars();
  REDRAW(trackPanel);
  REDRAW(rulerPanel);
  UpdateMenus();
}

void AudioView::Pitch()
{
  VTrack *t;
  bool success = false;

  TrackList *tracks = GetTracks();
  t = tracks->First();
  while(t) {
    if (t->selected && t->GetKind() == VTrack::Wave) {
      NoteTrack *note = PitchExtract((WaveTrack *)t,
				     &((AudioDoc *)GetDocument())->dirManager);
      if (note) {
		success = true;
		tracks->Add(note);
      }
    }

    t = tracks->Next();
  }

  if (success) {
    PushState();
    
    FixScrollbars();
    REDRAW(trackPanel);
    REDRAW(rulerPanel);
  }
}

void AudioView::ImportMIDI()
{
  wxString fileName =
	wxFileSelector("Select a MIDI File...",
				   "", // Path
				   "", // Name
				   ".mid", // Extension
				   "*.mid", // Wildcard
				   0, // Flags
				   GetFrame()); // Parent

  if (fileName == "")
    return;

  NoteTrack *newTrack =
	new NoteTrack(&((AudioDoc *)GetDocument())->dirManager);
  
  if (::ImportMIDI(fileName, newTrack)) {

    SelectNone();
    GetTracks()->Add(newTrack);
	newTrack->selected = true;
    
    PushState();

    FixScrollbars();
    REDRAW(trackPanel);
    REDRAW(rulerPanel);
  }
}

	virtual void Draw(BRect updateRect)
	{
		BRegion region;
		region.Include(BRect(20, 20, 40, 40));
		region.Include(BRect(30, 30, 80, 80));
		ConstrainClippingRegion(&region);

		SetHighColor(55, 255, 128, 255);
		FillRect(BRect(0, 0, 100, 100));

		PushState();
			SetOrigin(15, 15);
	
			ConstrainClippingRegion(&region);
	
			SetHighColor(155, 255, 128, 255);
			FillRect(BRect(0, 0, 100, 100));
	
//			ConstrainClippingRegion(NULL);
	
			SetHighColor(0, 0, 0, 255);
			StrokeLine(BPoint(2, 2), BPoint(80, 80));
			SetHighColor(255, 0, 0, 255);
			StrokeLine(BPoint(2, 2), BPoint(4, 2));
		PopState();

		SetHighColor(0, 0, 0, 255);
		StrokeLine(BPoint(4, 2), BPoint(82, 80));
	}

void NetListView::FrameResized(float width, float height)
{
	BListView::FrameResized(width, height);
	//Ensure the bevel on the right is drawn properly
	if(width < oldWidth)
		oldWidth = width;
	PushState();
	BRect invalRect(oldWidth, 0, oldWidth, height);
	ConvertFromParent(&invalRect);
	BRegion lineRegion(invalRect);
	ConstrainClippingRegion(&lineRegion);
	Draw(invalRect);
	oldWidth = width;
	PopState();
	
	//Do word wrapping
	BFont curFont;
	GetFont(&curFont);
	float itemWidth = Bounds().Width();
	float wrapWidth = (itemWidth - 6)/curFont.Size();
	for(int itemNum = 0; itemNum < CountItems(); itemNum++)
	{
		NetListItem* item = (NetListItem*)(Items()[itemNum]);
		item->SetWidth(itemWidth);
		item->CalcWordWrap(wrapWidth);
	}
	//DoForEach(UpdateItem, (void*)this);
	Invalidate();
	
	BListView::FrameResized(width, height);
}

void AudacityProject::Trim(wxEvent & event)
{
   if (mViewInfo.sel0 >= mViewInfo.sel1)
      return;

   TrackListIterator iter(mTracks);
   VTrack *n = iter.First();

   while (n) {
      if (n->GetSelected()) {
         //Delete the section before the left selector
         n->Clear(n->GetOffset(), mViewInfo.sel0);
         if (mViewInfo.sel0 > n->GetOffset())
            n->SetOffset(mViewInfo.sel0);

         //Delete the section after the right selector
         n->Clear(mViewInfo.sel1, n->GetMaxLen());
      }
      n = iter.Next();
   }

   FixScrollbars();
   mTrackPanel->Refresh(false);
   PushState(_("Trim file to selection"));
}

void AudacityProject::OnImportMIDI(wxCommandEvent & event)
{
   wxString path = gPrefs->Read("/DefaultOpenPath",::wxGetCwd());

   wxString fileName = wxFileSelector(_("Select a MIDI file..."),
                                      path,     // Path
                                      "",       // Name
                                      "",       // Extension
                                      _("All files (*.*)|*.*|"
                                        "MIDI files (*.mid)|*.mid|"
                                        "Allegro files (*.gro)|*.gro"),
                                      0,        // Flags
                                      this);    // Parent

   if (fileName != "") {
      path =::wxPathOnly(fileName);
      gPrefs->Write("/DefaultOpenPath", path);

      NoteTrack *newTrack = new NoteTrack(&mDirManager);

      if (::ImportMIDI(fileName, newTrack)) {

         SelectNone();
         mTracks->Add(newTrack);
         newTrack->SetSelected(true);

         PushState(wxString::Format(_("Imported MIDI from '%s'"),
                                    fileName.c_str()));

         FixScrollbars();
         mTrackPanel->Refresh(false);
      }
   }
}

void
BBox::Draw(BRect updateRect)
{
	if (!IsVisible() || fBorder == B_NO_BORDER) return;

	e_theme_engine *theme = get_current_theme_engine();
	if (theme == NULL || theme->get_border_margins == NULL || theme->draw_border == NULL) return;

	float l = 0, t = 0, r = 0, b = 0;
	theme->get_border_margins(theme, this, &l, &t, &r, &b, fBorder, PenSize());

	BRect rect = Frame().OffsetToSelf(B_ORIGIN);
	if (!(fLabelView == NULL || fLabelView->Frame().Width() <= 0 || fLabelView->Frame().Height() < t))
		rect.top += (fLabelView->Frame().Height() - t) / 2.f;

	PushState();

	BRegion clipping(updateRect);
	if (!(fLabelView == NULL || fLabelView->Frame().IsValid() == false)) clipping.Exclude(fLabelView->Frame());
	ConstrainClippingRegion(&clipping);

	if (clipping.CountRects() > 0) theme->draw_border(theme, this, rect, fBorder, PenSize());

	PopState();
}

void GameEngine::Escaper() //this should be done in seperate class if I'm correct?
{
	if(event.type == ALLEGRO_EVENT_KEY_DOWN) //this thing shouldn't be here imo
	{
		switch(event.keyboard.keycode)
		{
		case ALLEGRO_KEY_ESCAPE:
			if (IsGameStateActive())
			{
				PushState(menuState);
				menuState->SwitchToMenu("Wave Menu");
			}
			else if (menuState->CurrentMenu->GetName() == "Wave Menu")
			{
				PopState();
			}
			break;
		case ALLEGRO_KEY_B: //this should seriously be left somewhere else, or this method should change its name
			if (IsGameStateActive())
			{
				if (collisionDetector->IsHitboxDisplayEnabled())
					collisionDetector->EnableHitboxDisplay(false);
				else
					collisionDetector->EnableHitboxDisplay(true);
			}
			break;
		}
	}
	else if (event.type == ALLEGRO_EVENT_DISPLAY_CLOSE)
		Quit();
}

GameEngine::GameEngine(int argc, char **argv) {
	m_running = true;

	// pass in glfwGetPrimaryMonitor() to first null for fullscreen
	window = glfwCreateWindow(1024, 768, WINDOWTITLE, NULL, NULL);

	if (!window)
	{
		fprintf(stderr, "Failed to open GLFW window. If you have an Intel GPU, they are not 3.3 compatible. Try the 2.1 version of the tutorials.\n");
		glfwTerminate();
		exit(EXIT_FAILURE);
	}
	glfwMakeContextCurrent(window);

	// Currently just starts it with the PlayState
	PlayState *state = new PlayState(window);
	PushState(state);
	ChangeState(state);
	
	//Callbacks
	glfwSetKeyCallback(window, key_callback);
	glfwSetCursorPosCallback(window, mouse_motion);
	glfwSetMouseButtonCallback(window, mouse_button);
	glfwSetScrollCallback(window, mouse_scroll);
}

void VideoEngine::DrawGrid(float x, float y, float x_step, float y_step, const Color &c)
{
    PushState();

    Move(0, 0);

    float x_max = _current_context.coordinate_system.GetRight();
    float y_max = _current_context.coordinate_system.GetBottom();

    std::vector<GLfloat> vertices;
    int32 num_vertices = 0;
    for(; x <= x_max; x += x_step) {
        vertices.push_back(x);
        vertices.push_back(_current_context.coordinate_system.GetBottom());
        vertices.push_back(x);
        vertices.push_back(_current_context.coordinate_system.GetTop());
        num_vertices += 2;
    }
    for(; y < y_max; y += y_step) {
        vertices.push_back(_current_context.coordinate_system.GetLeft());
        vertices.push_back(y);
        vertices.push_back(_current_context.coordinate_system.GetRight());
        vertices.push_back(y);
        num_vertices += 2;
    }
    glColor4fv(&c[0]);
    DisableTexture2D();
    EnableVertexArray();
    glVertexPointer(2, GL_FLOAT, 0, &(vertices[0]));
    glDrawArrays(GL_LINES, 0, num_vertices);

    PopState();
}

bool Mind::EndState()
{
	if (!_stateQueue.empty())
	{
		// Don't destroy the State object this round
		_recycleBin = _stateQueue.front();

		DM_LOG(LC_AI, LT_INFO)LOGSTRING("Ending State %s (%s)\r", _recycleBin->GetName().c_str(), _owner.GetEntity()->name.c_str());

		// Remove the current state from the queue
		_stateQueue.pop_front();

		// Trigger a stateswitch next round in any case
		_switchState = true;
	}

	if (_stateQueue.empty())
	{
		// No states left, add the default state at least
		PushState(STATE_DEFAULT);
	}
	
	// Return TRUE if there are additional states left
	return true;
}

void TExportZone::DrawInMarker(BRect updateRect)
{
	// Set up environment
	PushState();
		
	BPoint drawPt;
	
	// Draw left marker
	if (updateRect.Intersects(m_InRect) )
	{
		// Draw indicator in new location
		drawPt.Set(m_InRect.left, m_InRect.top);
		DrawBitmap(m_InMarker, drawPt);
	}

	// Draw right marker
	if (updateRect.Intersects(m_OutRect) )
	{
		// Draw indicator in new location
		drawPt.Set(m_OutRect.left, m_OutRect.top);
		DrawBitmap(m_OutMarker, drawPt);
	}
		
	// Restore environment
	PopState();
}