C++ HasFocus函数代码示例

void View::PersistData(PersistStatus status, std::string anonId, PersistMap &storage) {
	// Remember if this view was a focused view.
	std::string tag = Tag();
	if (tag.empty()) {
		tag = anonId;
	}

	const std::string focusedKey = "ViewFocused::" + tag;
	switch (status) {
	case UI::PERSIST_SAVE:
		if (HasFocus()) {
			storage[focusedKey].resize(1);
		}
		break;
	case UI::PERSIST_RESTORE:
		if (storage.find(focusedKey) != storage.end()) {
			SetFocus();
		}
		break;
	}
}

void DragManipulator::OnMouseButtonPressed(const Mouse::Button& pButton)
{
    if(pButton != Mouse::Button_Left || !HasFocus())
        return;

    Renderer* renderer = GraphicSubsystem::Instance()->GetRenderer();
    GD_ASSERT(renderer);

    // Get the position of the mouse in the screen and widget.
    Int32 x, y;
    InputSubsystem::GetMouse().GetPos(x, y);
    mScreenClickPos = Vector2f(x, y);

    QPoint widgetPos = mEditor->GetMainView()->mapFromGlobal(QPoint(x, y));
    mClickPos = Vector2f(widgetPos.x(), widgetPos.y());

    // Calculate the center position of the manipulated objects.
    mWorldPosition = GetCenterPosition();

    UpdateOriginPositions();
}

inline void
TabMenuDisplay::PaintMainMenuItems(Canvas &canvas) const
{
  PaintMainMenuBorder(canvas);

  const bool is_focused = !HasCursorKeys() || HasFocus();

  unsigned main_menu_index = 0;
  for (auto i = main_menu_buttons.begin(),
         end = main_menu_buttons.end(); i != end;
       ++i, ++main_menu_index) {
    const bool isDown = main_menu_index == down_index.main_index &&
      !down_index.IsSub() && !drag_off_button;

    const bool is_selected = isDown ||
      main_menu_index == GetPageMainIndex(cursor);

    main_menu_buttons[main_menu_index].Draw(canvas, look,
                                            is_focused, isDown, is_selected);
  }
}

    void ActiveWidget::AcceptInputReset( const InputReset &request)
    {
        Widget *sender = request.Sender();
        _cursor = Pos(-1,-1);
        int i;

        for (i=0; i!=NUM_BUTTONS; ++i)
        {
            if ( _was_touched[i] ) 
            { 
                if (_was_over) OnMoveOut[i].Schedule_1( _cursor );
                OnRelease[i].Schedule_1( _cursor ); 
            }
            _was_touched[i] = false;
            _is_dragging[i] = false;
            _mb_down[i] = false;
        }

        for (i=0; i!=_pressed_keys.Size(); ++i)
        {
            bool likes_this_key = false;
            likes_this_key |= _on_path_key_mask.GetBit( _pressed_keys[i] );
            likes_this_key |= HasFocus() && _key_mask.GetBit( _pressed_keys[i] );
            if ( likes_this_key )
            {
                OnKeyRelease.Schedule_1( _pressed_keys[i]);
            }
        }
        _pressed_keys.Clear();

        if (_was_over || _unsent_outside)
        {
            OnMoveOutside.Schedule_1( _cursor ); HideHint();
        }

        _was_over = false;
        _unsent_outside = false;
        _result = false;
        Widget::Accept( InputReset(this) );
    }

void Choice::Draw(UIContext &dc) {
	if (!IsSticky()) {
		ClickableItem::Draw(dc);
	} else {
		Style style =	dc.theme->itemStyle;
		if (highlighted_) {
			style = dc.theme->itemHighlightedStyle;
		}
		if (down_) {
			style = dc.theme->itemDownStyle;
		}
		if (HasFocus()) {
			style = dc.theme->itemFocusedStyle;
		}
		dc.FillRect(style.background, bounds_);
	}

	Style style = dc.theme->itemStyle;
	if (!IsEnabled())
		style = dc.theme->itemDisabledStyle;

	if (atlasImage_ != -1) {
		dc.Draw()->DrawImage(atlasImage_, bounds_.centerX(), bounds_.centerY(), 1.0f, style.fgColor, ALIGN_CENTER);
	} else {
		int paddingX = 12;
		dc.SetFontStyle(dc.theme->uiFont);
		if (centered_) {
			dc.DrawText(text_.c_str(), bounds_.centerX(), bounds_.centerY(), style.fgColor, ALIGN_CENTER);
		} else {
			if (iconImage_ != -1) {
				dc.Draw()->DrawImage(iconImage_, bounds_.x2() - 32 - paddingX, bounds_.centerY(), 0.5f, style.fgColor, ALIGN_CENTER);
			}
			dc.DrawText(text_.c_str(), bounds_.x + paddingX, bounds_.centerY(), style.fgColor, ALIGN_VCENTER);
		}
	}

	if (selected_) {
		dc.Draw()->DrawImage(dc.theme->checkOn, bounds_.x2() - 40, bounds_.centerY(), 1.0f, style.fgColor, ALIGN_CENTER);
	}
}

inline void
TabMenuDisplay::PaintSubMenuItems(Canvas &canvas,
                                  const unsigned CaptionStyle) const
{
  const MainMenuButton &main_button =
    GetMainMenuButton(GetPageMainIndex(cursor));

  PaintSubMenuBorder(canvas, main_button);

  assert(main_button.first_page_index < buttons.size());
  assert(main_button.last_page_index < buttons.size());

  const bool is_focused = !HasCursorKeys() || HasFocus();

  for (unsigned first_page_index = main_button.first_page_index,
         last_page_index = main_button.last_page_index,
         page_index = first_page_index;
       page_index <= last_page_index; ++page_index) {
    const unsigned sub_index = page_index - first_page_index;

    const bool is_pressed = sub_index == down_index.sub_index &&
      !drag_off_button;

    const bool is_cursor = page_index == cursor;
    const bool is_selected = is_pressed || is_cursor;

    canvas.SetTextColor(look.list.GetTextColor(is_selected, is_focused,
                                               is_pressed));
    canvas.SetBackgroundColor(look.list.GetBackgroundColor(is_selected,
                                                           is_focused,
                                                           is_pressed));

    const PixelRect &rc = GetSubMenuButtonSize(page_index);
    TabDisplay::PaintButton(canvas, CaptionStyle,
                            gettext(pages[page_index].menu_caption),
                            rc,
                            nullptr, is_cursor,
                            false);
  }
}

void AudioDisplay::OnPaint(wxPaintEvent&)
{
	if (!audio_renderer_provider) return;

	wxAutoBufferedPaintDC dc(this);

	wxRect audio_bounds(0, audio_top, GetClientSize().GetWidth(), audio_height);
	bool redraw_scrollbar = false;
	bool redraw_timeline = false;

	for (wxRegionIterator region(GetUpdateRegion()); region; ++region)
	{
		wxRect updrect = region.GetRect();

		redraw_scrollbar |= scrollbar->GetBounds().Intersects(updrect);
		redraw_timeline |= timeline->GetBounds().Intersects(updrect);

		if (audio_bounds.Intersects(updrect))
		{
			TimeRange updtime(
				std::max(0, TimeFromRelativeX(updrect.x - foot_size)),
				std::max(0, TimeFromRelativeX(updrect.x + updrect.width + foot_size)));

			PaintAudio(dc, updtime, updrect);
			PaintMarkers(dc, updtime);
			PaintLabels(dc, updtime);
		}
	}

	if (track_cursor_pos >= 0)
	{
		PaintTrackCursor(dc);
	}

	if (redraw_scrollbar)
		scrollbar->Paint(dc, HasFocus());
	if (redraw_timeline)
		timeline->Paint(dc);
}

bool CGUIControl::OnAction(const CAction &action)
{
  if (HasFocus())
  {
    switch (action.GetID())
    {
    case ACTION_MOVE_DOWN:
      OnDown();
      return true;

    case ACTION_MOVE_UP:
      OnUp();
      return true;

    case ACTION_MOVE_LEFT:
      OnLeft();
      return true;

    case ACTION_MOVE_RIGHT:
      OnRight();
      return true;

    case ACTION_SHOW_INFO:
      return OnInfo();

    case ACTION_NAV_BACK:
      return OnBack();

    case ACTION_NEXT_CONTROL:
      OnNextControl();
      return true;

    case ACTION_PREV_CONTROL:
      OnPrevControl();
      return true;
    }
  }
  return false;
}

void CNavigationBar::Draw(void) const {
	CWindow::Draw();
	if (m_pSDLSurface)
	{
		CPainter Painter(m_pSDLSurface, CPainter::PAINT_REPLACE);        
		Painter.Draw3DLoweredRect(m_WindowRect.SizeRect(), DEFAULT_BACKGROUND_COLOR);
        SDL_Rect PictureSourceRect = CRect(CPoint(0, 0), 30, 30).SDLRect();
		for (unsigned int i = 0; i < m_Items.size(); ++i)
		{
			CRect ItemRect(CPoint(m_ClientRect.Left() + i*m_iItemWidth, m_ClientRect.Top()),
				m_iItemWidth , m_iItemHeight);
			if (ItemRect.Overlaps(m_ClientRect))
			{
				ItemRect.ClipTo(m_ClientRect);
				ItemRect.SetBottom(ItemRect.Bottom() - 1);
				ItemRect.SetRight(ItemRect.Right() - 1);
				if (i == m_iSelectedItem)
				{
					Painter.DrawRect(ItemRect, true, CApplication::Instance()->GetDefaultSelectionColor(), CApplication::Instance()->GetDefaultSelectionColor());
				}
				if (i == m_iFocusedItem && HasFocus())
				{
					ItemRect.Grow(1);
					Painter.DrawRect(ItemRect, false, CApplication::Instance()->GetDefaultSelectionColor() * 0.7);
					ItemRect.Grow(-1);
				}
				ItemRect.Grow(-1);
        // '- CPoint(0,1)' is to move the reference point one pixel up (otherwise the lowest pixels of p,g,q,y 
        // etc. are not fully visible.
				m_RenderedStrings.at(i).Draw(m_pSDLSurface, ItemRect, ItemRect.BottomLeft() - CPoint(0, 1) + CPoint(ItemRect.Width()/2, 0), m_Items[i].ItemColor);
        // Draw the picture (if available):
        if (m_Bitmaps.at(i) != nullptr) {
          SDL_Rect DestRect = ItemRect.Move(9, 1).SDLRect();
          SDL_BlitSurface(m_Bitmaps.at(i)->Bitmap(), &PictureSourceRect, m_pSDLSurface, &DestRect);
        }
			}
		}
	}
}

void
WndCustomButton::OnPaint(Canvas &canvas)
{
#ifdef HAVE_CLIPPING
  /* background and selector */
  canvas.Clear(look.background_brush);
#endif

  PixelRect rc = GetClientRect();

  // Draw focus rectangle
  if (HasFocus()) {
    canvas.DrawFilledRectangle(rc, look.focused.background_color);
    canvas.SetTextColor(IsEnabled()
                        ? look.focused.text_color : look.button.disabled.color);
  } else {
    canvas.DrawFilledRectangle(rc, look.background_color);
    canvas.SetTextColor(IsEnabled() ? look.text_color : look.button.disabled.color);
  }

  // If button has text on it
  tstring caption = get_text();
  if (caption.empty())
    return;

  // If button is pressed, offset the text for 3D effect
  if (is_down())
    OffsetRect(&rc, 1, 1);

  canvas.SelectNullPen();
  canvas.SetBackgroundTransparent();
#ifndef USE_GDI
  canvas.formatted_text(&rc, caption.c_str(), GetTextStyle());
#else
  unsigned s = DT_CENTER | DT_NOCLIP | DT_WORDBREAK;
  canvas.Select(*(look.button.font));
  canvas.formatted_text(&rc, caption.c_str(), s);
#endif
}

void Clickable::Key(const KeyInput &key) {
	if (!HasFocus() && key.deviceId != DEVICE_ID_MOUSE) {
		down_ = false;
		return;
	}
	// TODO: Replace most of Update with this.
	if (key.flags & KEY_DOWN) {
		if (IsAcceptKeyCode(key.keyCode)) {
			down_ = true;
		}
	}
	if (key.flags & KEY_UP) {
		if (IsAcceptKeyCode(key.keyCode)) {
			if (down_) {
				Click();
				down_ = false;
			}
		} else if (IsEscapeKeyCode(key.keyCode)) {
			down_ = false;
		}
	}
}

void wxBitmapButton::OnSetBitmap()
{
    wxCHECK_RET( m_widget != NULL, wxT("invalid bitmap button") );

    InvalidateBestSize();

    wxBitmap the_one;
    if (!IsThisEnabled())
        the_one = GetBitmapDisabled();
   else if (m_isSelected)
     the_one = GetBitmapPressed();
   else if (HasFocus())
     the_one = GetBitmapFocus();

   if (!the_one.IsOk())
     {
         the_one = GetBitmapLabel();
         if (!the_one.IsOk())
             return;
     }

    GdkBitmap *mask = NULL;
    if (the_one.GetMask()) mask = the_one.GetMask()->GetBitmap();

    GtkWidget *child = BUTTON_CHILD(m_widget);
    if (child == NULL)
    {
        // initial bitmap
        GtkWidget *pixmap;
        pixmap = gtk_pixmap_new(the_one.GetPixmap(), mask);
        gtk_widget_show(pixmap);
        gtk_container_add(GTK_CONTAINER(m_widget), pixmap);
    }
    else
    {   // subsequent bitmaps
        GtkPixmap *pixmap = GTK_PIXMAP(child);
        gtk_pixmap_set(pixmap, the_one.GetPixmap(), mask);
    }
}

void CGUIMoverControl::Process(unsigned int currentTime, CDirtyRegionList &dirtyregions)
{
  if (m_bInvalidated)
  {
    m_imgFocus.SetWidth(m_width);
    m_imgFocus.SetHeight(m_height);

    m_imgNoFocus.SetWidth(m_width);
    m_imgNoFocus.SetHeight(m_height);
  }
  if (HasFocus())
  {
    unsigned int alphaCounter = m_frameCounter + 2;
    unsigned int alphaChannel;
    if ((alphaCounter % 128) >= 64)
      alphaChannel = alphaCounter % 64;
    else
      alphaChannel = 63 - (alphaCounter % 64);

    alphaChannel += 192;
    if (SetAlpha( (unsigned char)alphaChannel ))
      MarkDirtyRegion();
    m_imgFocus.SetVisible(true);
    m_imgNoFocus.SetVisible(false);
    m_frameCounter++;
  }
  else
  {
    if (SetAlpha(0xff))
      MarkDirtyRegion();
    m_imgFocus.SetVisible(false);
    m_imgNoFocus.SetVisible(true);
  }
  m_imgFocus.Process(currentTime);
  m_imgNoFocus.Process(currentTime);

  CGUIControl::Process(currentTime, dirtyregions);
}

void ColorPusher::Paint(Draw& w)
{
	Size sz = GetSize();
	w.DrawRect(sz, push ? SColorHighlight : SColorPaper);
	int ty = (sz.cy - StdFont().Info().GetHeight()) / 2;
	if(withtext) {
		w.DrawRect(2, 2, sz.cy - 4, sz.cy - 4, color);
		DrawFrame(w, 1, 1, sz.cy - 2, sz.cy - 2, SColorText);
		w.DrawText(sz.cy + 2, ty, FormatColor(color), StdFont(), SColorText());
	}
	else {
		if(!IsNull(color)) {
			w.DrawRect(2, 2, sz.cx - 4, sz.cy - 4, color);
			DrawFrame(w, 1, 1, sz.cx - 2, sz.cy - 2, SColorText);
		}
		else
		if(!withtext)
			w.DrawText(max(2, (sz.cx - GetTextSize(nulltext, StdFont()).cx) / 2), ty,
			           nulltext, StdFont(), SColorText());
	}
	if(HasFocus())
		DrawFocus(w, GetSize());
}

	virtual void PerformLayout()
	{
		TextImage *textImage = GetTextImage();
		if (m_bSelected)
		{
			VPANEL focus = input()->GetFocus();
			// if one of the children of the SectionedListPanel has focus, then 'we have focus' if we're selected
			if (HasFocus() || (focus && ipanel()->HasParent(focus, GetVParent())))
			{
				textImage->SetColor(m_ArmedFgColor2);
			}
			else
			{
				textImage->SetColor(m_FgColor2);
			}
		}
		else
		{
			textImage->SetColor(GetFgColor());					
		}
		BaseClass::PerformLayout();
		Repaint();
	}